Too many changes to enumerate

.drone.yml

@@ -0,0 +1,40 @@
+---
+kind: pipeline
+name: rpn_rs
+type: docker
+
+steps:
+  - name: Run earthly
+    image: earthly/earthly
+    privileged: true
+    volumes:
+      - name: docker_sock
+        path: /var/run/docker.sock
+      - name: dist
+        path: /dist
+    commands:
+      - 'file /var/run/docker.sock || :'
+      - 'pwd'
+      - 'earthly +all'
+      - 'cp -v ./dist/* /dist/'
+
+  - name: Gitea Artifacts
+    image: plugins/gitea-release
+    when:
+      event:
+        - tag
+    settings:
+      api_key:
+        from_secret: GITEA_API_KEY
+      base_url: https://gitea.austen-wares.com
+      files: dist/*
+    volumes:
+      - name: dist
+        path: /dist
+
+volumes:
+  - name: docker_sock
+    host:
+      path: /var/run/docker.sock
+  - name: dist
+    temp: {}

.earthignore

@@ -2,3 +2,4 @@
 !/src
 !/Cargo.*
 !/.cargo
+!/README.adoc

Cargo.toml

@@ -1,14 +1,42 @@
 [package]
 name = "rpn_rs"
-version = "0.4.0"
+version = "0.6.0"
+description = "A TUI RPN calculator, similar to Orpie"
 authors = ["Austen Adler <agadler@austenadler.com>"]
 edition = "2018"
 readme = "README.adoc"
+license = "GPL-3.0-only"
+# TODO: Add the URL here
+repository = "https://"
 keywords = ["tui", "cli", "rpn"]
 categories = ["command-line-utilities"]
 
+[workspace]
+members = [
+    ".",
+    "./rpn_rs_tui/",
+    "./rpn_rs_gui/",
+]
+
 [dependencies]
-crossterm = "0.18"
-tui = { version = "0.14", default-features = false, features = ['crossterm'] }
 serde = {version = "1.0", features = ["derive"]}
-confy = "0.4.0"
+# confy = "0.4.0"
+toml = "0.4.2"
+lazy_static = "1.4.0"
+rust_decimal = { version = "1.29.1", features=["maths"] }
+rust_decimal_macros = "1.29.1"
+tracing-subscriber = { version = "0.3.17", features = ["env-filter"] }
+tracing-appender = "0.2.2"
+tracing = "0.1.37"
+egui_extras = "0.22.0"
+
+[dependencies.confy]
+# TODO: Update this to v0.5.0 when it finally comes out -- for now, use latest git master
+# version = "0.4.0"
+git = "https://github.com/rust-cli/confy/"
+# TOML will not serialize because of ordering issues
+features = ["yaml_conf"]
+default-features = false
+
+[package.metadata.deb]
+depends = ""

README.adoc

@@ -58,7 +58,7 @@ asciidoctor REAMDE.adoc
 
 If you have not done this before, open the calculator and press `<ctrl+s>` to save the basic config.
 
-Edit the config file (in Linux, edit `~/.config/rpn_rs/rpn_rs.toml` and add any constants or macros and press `<ctrl+l>` or reopen the calculator.
+Edit the config file (in Linux, edit `~/.config/rpn_rs/rpn_rs.yaml` and add any constants or macros and press `<ctrl+l>` or reopen the calculator.
 
 Sample Macros:
 
@@ -133,3 +133,7 @@ Will I implement these features? I don't know. Lots of these could be done by se
 * Bases: Not yet
 * Different math operators like `!` or `sum`: If someone asks me to, I guess
 * Conditionals: If someone asks me to, I guess
+
+=== Credits
+
+* LCD Solid Font licensed as public domain from: https://www.fontspace.com/lcd-solid-font-f11346

build-mac.sh

@@ -0,0 +1,10 @@
+#!/usr/bin/env zsh
+set -euxo pipefail
+TARGET=target/x86_64-apple-darwin/release/rpn_rs
+cargo build --release --target x86_64-apple-darwin
+du -sh "./${TARGET}"
+strip "./${TARGET}"
+du -sh "./${TARGET}"
+gzip -f "./${TARGET}"
+du -sh "./${TARGET}.gz"
+mv "./${TARGET}.gz" "./target/release/rpn_rs-x86_64-apple-darwin.gz"

build.earth

@@ -1,48 +1,77 @@
+VERSION 0.6
 FROM rust:latest
 ENV CARGO_HOME=/deps
-ARG APP_NAME=rpn_rs
 WORKDIR /work
 
 deps:
-	COPY ./Cargo.toml ./Cargo.lock .
-	# This is a binary program, expose a main.rs file
-	RUN mkdir src && touch src/main.rs
-	RUN cargo fetch
-	SAVE ARTIFACT /deps
+    COPY ./Cargo.toml ./Cargo.lock .
+    # This is a binary program, expose a main.rs file
+    RUN mkdir src && touch src/main.rs
+    RUN cargo fetch
+    SAVE ARTIFACT /deps
 
 rust-builder:
-	RUN rustup target add x86_64-unknown-linux-musl
-	RUN rustup target add x86_64-pc-windows-gnu
-	RUN rustup target add i686-unknown-linux-musl
-	RUN rustup target add aarch64-unknown-linux-musl
-	RUN rustup target add arm-unknown-linux-musleabi
-	RUN rustup target add armv7-unknown-linux-musleabi
+    # Linux
+    RUN rustup target add x86_64-unknown-linux-musl
+    RUN rustup target add i686-unknown-linux-musl
+    RUN rustup target add i686-unknown-linux-musl
+    RUN rustup target add aarch64-unknown-linux-musl
+    RUN rustup target add arm-unknown-linux-musleabi
+    RUN rustup target add armv7-unknown-linux-musleabi
+    # Windows
+    RUN rustup target add x86_64-pc-windows-gnu
+    RUN rustup target add i686-pc-windows-gnu
 
-	RUN apt-get update
-	RUN DEBIAN_FRONTEND=noninteractive apt-get install -y gcc-arm-linux-gnueabi gcc-aarch64-linux-gnu gdb-mingw-w64 gcc-mingw-w64-x86-64
+    RUN apt-get update
+    RUN DEBIAN_FRONTEND=noninteractive apt-get install -y gcc-arm-linux-gnueabi gcc-aarch64-linux-gnu gdb-mingw-w64 gcc-mingw-w64-x86-64 gcc-mingw-w64-i686
 
-	SAVE IMAGE docker-wg:5000/rust-builder
+    RUN cargo install cargo-deb
+
+    SAVE IMAGE docker-wg:5000/rust-builder
 
 build:
-	FROM +rust-builder
-	COPY . .
-	COPY +deps/deps /deps
+    FROM +rust-builder
 
-	ARG TOOLCHAIN
+    COPY +deps/deps /deps
 
-	RUN cargo build --release --target "$TOOLCHAIN"
-	ARG EXT
-	ARG STRIP_CMD
-	RUN if [ "$STRIP_CMD" ]; then "$STRIP_CMD" "target/$TOOLCHAIN/release/$APP_NAME$EXT"; fi
-	# --force for windows since multiple hardlinks
-	RUN xz --force --keep "target/$TOOLCHAIN/release/$APP_NAME$EXT"
-	SAVE ARTIFACT target/$TOOLCHAIN/release/$APP_NAME$EXT AS LOCAL target/$TOOLCHAIN/release/$APP_NAME-$TOOLCHAIN$EXT
-	SAVE ARTIFACT target/$TOOLCHAIN/release/$APP_NAME$EXT.xz AS LOCAL target/$TOOLCHAIN/release/$APP_NAME-$TOOLCHAIN$EXT.xz
+    ARG TOOLCHAIN
+
+    # Cache whatever dependency builds you can
+    COPY ./Cargo.toml ./Cargo.lock .
+    RUN \
+        mkdir src && touch src/lib.rs && \
+        cargo build --offline --release --target "$TOOLCHAIN" `#--jobs 1` && \
+        rm src/lib.rs && rmdir src && \
+        :
+
+    # Actually build the program
+    COPY . .
+    RUN cargo build --offline --release --target "$TOOLCHAIN" `#--jobs 1`
+
+    ARG EXT
+    ARG STRIP_CMD
+    ARG APP_NAME=rpn_rs
+
+    RUN if [ "$STRIP_CMD" ]; then "$STRIP_CMD" "target/$TOOLCHAIN/release/$APP_NAME$EXT"; fi
+    # --force for windows since multiple hardlinks
+    RUN xz --force --keep "target/$TOOLCHAIN/release/$APP_NAME$EXT"
+
+    # Also build a deb file
+    IF [ -z "${TOOLCHAIN##*-linux-*}" ]
+        RUN echo "Building deb for ${TOOLCHAIN}"
+        RUN cargo deb --target "${TOOLCHAIN}"
+
+        SAVE ARTIFACT target/$TOOLCHAIN/debian/$APP_NAME_*.deb AS LOCAL dist/
+    END
+
+    # SAVE ARTIFACT target/$TOOLCHAIN/release/$APP_NAME$EXT AS LOCAL dist/
+    SAVE ARTIFACT target/$TOOLCHAIN/release/$APP_NAME$EXT.xz AS LOCAL dist/$APP_NAME-$TOOLCHAIN$EXT.xz
 
 all:
-	BUILD --build-arg TOOLCHAIN=x86_64-unknown-linux-musl    --build-arg STRIP_CMD=x86_64-linux-gnu-strip  +build
-	BUILD --build-arg TOOLCHAIN=i686-unknown-linux-musl      --build-arg STRIP_CMD=x86_64-linux-gnu-strip  +build
-	BUILD --build-arg TOOLCHAIN=aarch64-unknown-linux-musl   --build-arg STRIP_CMD=aarch64-linux-gnu-strip +build
-	BUILD --build-arg TOOLCHAIN=arm-unknown-linux-musleabi   --build-arg STRIP_CMD=arm-linux-gnueabi-strip +build
-	BUILD --build-arg TOOLCHAIN=armv7-unknown-linux-musleabi --build-arg STRIP_CMD=arm-linux-gnueabi-strip +build
-	BUILD --build-arg TOOLCHAIN=x86_64-pc-windows-gnu        --build-arg STRIP_CMD= --build-arg EXT=.exe   +build
+    BUILD --build-arg TOOLCHAIN=x86_64-unknown-linux-musl    --build-arg STRIP_CMD=x86_64-linux-gnu-strip  +build
+    BUILD --build-arg TOOLCHAIN=i686-unknown-linux-musl      --build-arg STRIP_CMD=x86_64-linux-gnu-strip  +build
+    BUILD --build-arg TOOLCHAIN=aarch64-unknown-linux-musl   --build-arg STRIP_CMD=aarch64-linux-gnu-strip +build
+    BUILD --build-arg TOOLCHAIN=arm-unknown-linux-musleabi   --build-arg STRIP_CMD=arm-linux-gnueabi-strip +build
+    BUILD --build-arg TOOLCHAIN=armv7-unknown-linux-musleabi --build-arg STRIP_CMD=arm-linux-gnueabi-strip +build
+    BUILD --build-arg TOOLCHAIN=x86_64-pc-windows-gnu        --build-arg STRIP_CMD= --build-arg EXT=.exe   +build
+    BUILD --build-arg TOOLCHAIN=i686-pc-windows-gnu          --build-arg STRIP_CMD= --build-arg EXT=.exe   +build

pipeline.yml

@@ -0,0 +1,22 @@
+---
+resources:
+    - name: source
+      type: git
+      source:
+          uri: https://gitea.austen-wares.com/stonewareslord/rpn_rs
+          branch: develop
+jobs:
+    - name: build
+      serial: true
+      plan:
+          - get: source
+          - task: build
+            config:
+                platform: linux
+                image_resource:
+                    type: docker-image
+                    source: {repository: }
+                inputs:
+                    - name: source
+                outputs:
+                    - name: out

rpn_rs_gui/.cargo/config.toml

@@ -0,0 +1,6 @@
+# clipboard api is still unstable, so web-sys requires the below flag to be passed for copy (ctrl + c) to work
+# https://rustwasm.github.io/docs/wasm-bindgen/web-sys/unstable-apis.html
+# check status at https://developer.mozilla.org/en-US/docs/Web/API/Clipboard#browser_compatibility
+# we don't use `[build]` because of rust analyzer's build cache invalidation https://github.com/emilk/eframe_template/issues/93
+[target.wasm32-unknown-unknown]
+rustflags = ["--cfg=web_sys_unstable_apis"]

rpn_rs_gui/.github/workflows/pages.yml

@@ -0,0 +1,45 @@
+name: Github Pages
+
+# By default, runs if you push to master. keeps your deployed app in sync with master branch.
+on:
+  push:
+    branches:
+      - master
+# to only run when you do a new github release, comment out above part and uncomment the below trigger.
+# on:
+#   release:
+#     types:
+#       - published
+
+permissions:
+  contents: write # for committing to gh-pages branch.
+
+jobs:
+  build-github-pages:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v2 # repo checkout
+      - uses: actions-rs/toolchain@v1 # get rust toolchain for wasm
+        with:
+          profile: minimal
+          toolchain: stable
+          target: wasm32-unknown-unknown
+          override: true
+      - name: Rust Cache # cache the rust build artefacts
+        uses: Swatinem/rust-cache@v1
+      - name: Download and install Trunk binary
+        run: wget -qO- https://github.com/thedodd/trunk/releases/latest/download/trunk-x86_64-unknown-linux-gnu.tar.gz | tar -xzf-
+      - name: Build # build
+        # "${GITHUB_REPOSITORY#*/}" evaluates into the name of the repository
+        # using --public-url something will allow trunk to modify all the href paths like from favicon.ico to repo_name/favicon.ico .
+        # this is necessary for github pages where the site is deployed to username.github.io/repo_name and all files must be requested
+        # relatively as eframe_template/favicon.ico. if we skip public-url option, the href paths will instead request username.github.io/favicon.ico which
+        # will obviously return error 404 not found.
+        run: ./trunk build --release --public-url "${GITHUB_REPOSITORY#*/}"
+      - name: Deploy
+        uses: JamesIves/github-pages-deploy-action@v4
+        with:
+          folder: dist
+          # this option will not maintain any history of your previous pages deployment
+          # set to false if you want all page build to be committed to your gh-pages branch history
+          single-commit: true

rpn_rs_gui/.github/workflows/rust.yml

@@ -0,0 +1,105 @@
+on: [push, pull_request]
+
+name: CI
+
+env:
+  # This is required to enable the web_sys clipboard API which egui_web uses
+  # https://rustwasm.github.io/wasm-bindgen/api/web_sys/struct.Clipboard.html
+  # https://rustwasm.github.io/docs/wasm-bindgen/web-sys/unstable-apis.html
+  RUSTFLAGS: --cfg=web_sys_unstable_apis
+
+jobs:
+  check:
+    name: Check
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v2
+      - uses: actions-rs/toolchain@v1
+        with:
+          profile: minimal
+          toolchain: stable
+          override: true
+      - uses: actions-rs/cargo@v1
+        with:
+          command: check
+          args: --all-features
+
+  check_wasm:
+    name: Check wasm32
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v2
+      - uses: actions-rs/toolchain@v1
+        with:
+          profile: minimal
+          toolchain: stable
+          target: wasm32-unknown-unknown
+          override: true
+      - uses: actions-rs/cargo@v1
+        with:
+          command: check
+          args: --all-features --lib --target wasm32-unknown-unknown
+
+  test:
+    name: Test Suite
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v2
+      - uses: actions-rs/toolchain@v1
+        with:
+          profile: minimal
+          toolchain: stable
+          override: true
+      - run: sudo apt-get install libxcb-render0-dev libxcb-shape0-dev libxcb-xfixes0-dev libxkbcommon-dev libssl-dev
+      - uses: actions-rs/cargo@v1
+        with:
+          command: test
+          args: --lib
+
+  fmt:
+    name: Rustfmt
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v2
+      - uses: actions-rs/toolchain@v1
+        with:
+          profile: minimal
+          toolchain: stable
+          override: true
+          components: rustfmt
+      - uses: actions-rs/cargo@v1
+        with:
+          command: fmt
+          args: --all -- --check
+
+  clippy:
+    name: Clippy
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v2
+      - uses: actions-rs/toolchain@v1
+        with:
+          profile: minimal
+          toolchain: stable
+          override: true
+          components: clippy
+      - uses: actions-rs/cargo@v1
+        with:
+          command: clippy
+          args: -- -D warnings
+
+  trunk:
+    name: trunk
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v2
+      - uses: actions-rs/toolchain@v1
+        with:
+          profile: minimal
+          toolchain: 1.65.0
+          target: wasm32-unknown-unknown
+          override: true
+      - name: Download and install Trunk binary
+        run: wget -qO- https://github.com/thedodd/trunk/releases/latest/download/trunk-x86_64-unknown-linux-gnu.tar.gz | tar -xzf-
+      - name: Build
+        run: ./trunk build

rpn_rs_gui/.gitignore

@@ -0,0 +1,2 @@
+/target
+/dist

rpn_rs_gui/Cargo.toml

@@ -0,0 +1,48 @@
+[package]
+name = "rpn_rs_gui"
+version = "0.1.0"
+authors = ["Austen Adler <agadler@austenadler.com>"]
+edition = "2021"
+rust-version = "1.65"
+
+
+[dependencies]
+rpn_rs = {path=".."}
+egui = "0.22.0"
+eframe = { version = "0.22.0", default-features = false, features = ["accesskit", "default_fonts", "glow", "persistence"] }
+
+# You only need serde if you want app persistence:
+serde = { version = "1", features = ["derive"] }
+tracing = "0.1.37"
+egui_extras = "0.22.0"
+
+# native:
+[target.'cfg(not(target_arch = "wasm32"))'.dependencies]
+tracing-subscriber = "0.3"
+
+# web:
+[target.'cfg(target_arch = "wasm32")'.dependencies]
+console_error_panic_hook = "0.1.6"
+tracing-wasm = "0.2"
+wasm-bindgen = { version = "0.2.87" }
+wasm-bindgen-futures = "0.4"
+
+
+# TODO: This block was commented
+# [profile.release]
+# opt-level = 2 # fast and small wasm
+
+# # Optimize all dependencies even in debug builds:
+# [profile.dev.package."*"]
+# opt-level = 2
+
+# TODO: This block was commented
+# [patch.crates-io]
+
+# If you want to use the bleeding edge version of egui and eframe:
+# egui = { git = "https://github.com/emilk/egui", branch = "master" }
+# eframe = { git = "https://github.com/emilk/egui", branch = "master" }
+
+# If you fork https://github.com/emilk/egui you can test with:
+# egui = { path = "../egui/crates/egui" }
+# eframe = { path = "../egui/crates/eframe" }

rpn_rs_gui/README.md

@@ -0,0 +1,75 @@
+# eframe template
+
+[![dependency status](https://deps.rs/repo/github/emilk/eframe_template/status.svg)](https://deps.rs/repo/github/emilk/eframe_template)
+[![Build Status](https://github.com/emilk/eframe_template/workflows/CI/badge.svg)](https://github.com/emilk/eframe_template/actions?workflow=CI)
+
+This is a template repo for [eframe](https://github.com/emilk/egui/tree/master/crates/eframe), a framework for writing apps using [egui](https://github.com/emilk/egui/).
+
+The goal is for this to be the simplest way to get started writing a GUI app in Rust.
+
+You can compile your app natively or for the web, and share it using Github Pages.
+
+## Getting started
+
+Start by clicking "Use this template" at https://github.com/emilk/eframe_template/ or follow [these instructions](https://docs.github.com/en/free-pro-team@latest/github/creating-cloning-and-archiving-repositories/creating-a-repository-from-a-template).
+
+Change the name of the crate: Chose a good name for your project, and change the name to it in:
+* `Cargo.toml`
+    * Change the `package.name` from `eframe_template` to `your_crate`.
+    * Change the `package.authors`
+* `main.rs`
+    * Change `eframe_template::TemplateApp` to `your_crate::TemplateApp`
+* `index.html`
+    * Change the `<title>eframe template</title>` to `<title>your_crate</title>`. optional.
+* `assets/sw.js`
+  * Change the `'./eframe_template.js'` to `./your_crate.js` (in `filesToCache` array)
+  * Change the `'./eframe_template_bg.wasm'` to `./your_crate_bg.wasm` (in `filesToCache` array)
+
+### Learning about egui
+
+`src/app.rs` contains a simple example app. This is just to give some inspiration - most of it can be removed if you like.
+
+The official egui docs are at <https://docs.rs/egui>. If you prefer watching a video introduction, check out <https://www.youtube.com/watch?v=NtUkr_z7l84>. For inspiration, check out the [the egui web demo](https://emilk.github.io/egui/index.html) and follow the links in it to its source code.
+
+### Testing locally
+
+Make sure you are using the latest version of stable rust by running `rustup update`.
+
+`cargo run --release`
+
+On Linux you need to first run:
+
+`sudo apt-get install libxcb-render0-dev libxcb-shape0-dev libxcb-xfixes0-dev libxkbcommon-dev libssl-dev`
+
+On Fedora Rawhide you need to run:
+
+`dnf install clang clang-devel clang-tools-extra libxkbcommon-devel pkg-config openssl-devel libxcb-devel fontconfig-devel`
+
+### Web Locally
+
+You can compile your app to [WASM](https://en.wikipedia.org/wiki/WebAssembly) and publish it as a web page.
+
+We use [Trunk](https://trunkrs.dev/) to build for web target.
+1. Install Trunk with `cargo install --locked trunk`.
+2. Run `trunk serve` to build and serve on `http://127.0.0.1:8080`. Trunk will rebuild automatically if you edit the project.
+3. Open `http://127.0.0.1:8080/index.html#dev` in a browser. See the warning below.
+
+> `assets/sw.js` script will try to cache our app, and loads the cached version when it cannot connect to server allowing your app to work offline (like PWA).
+> appending `#dev` to `index.html` will skip this caching, allowing us to load the latest builds during development.
+
+### Web Deploy
+1. Just run `trunk build --release`.
+2. It will generate a `dist` directory as a "static html" website
+3. Upload the `dist` directory to any of the numerous free hosting websites including [GitHub Pages](https://docs.github.com/en/free-pro-team@latest/github/working-with-github-pages/configuring-a-publishing-source-for-your-github-pages-site).
+4. we already provide a workflow that auto-deploys our app to GitHub pages if you enable it.
+> To enable Github Pages, you need to go to Repository -> Settings -> Pages -> Source -> set to `gh-pages` branch and `/` (root).
+>
+> If `gh-pages` is not available in `Source`, just create and push a branch called `gh-pages` and it should be available.
+
+You can test the template app at <https://emilk.github.io/eframe_template/>.
+
+## Updating egui
+
+As of 2022, egui is in active development with frequent releases with breaking changes. [eframe_template](https://github.com/emilk/eframe_template/) will be updated in lock-step to always use the latest version of egui.
+
+When updating `egui` and `eframe` it is recommended you do so one version at the time, and read about the changes in [the egui changelog](https://github.com/emilk/egui/blob/master/CHANGELOG.md) and [eframe changelog](https://github.com/emilk/egui/blob/master/crates/eframe/CHANGELOG.md).

rpn_rs_gui/Trunk.toml

@@ -0,0 +1,2 @@
+[build]
+filehash = false

rpn_rs_gui/assets/manifest.json

@@ -0,0 +1,28 @@
+{
+  "name": "egui Template PWA",
+  "short_name": "egui-template-pwa",
+  "icons": [
+    {
+      "src": "./icon-256.png",
+      "sizes": "256x256",
+      "type": "image/png"
+    },
+    {
+      "src": "./maskable_icon_x512.png",
+      "sizes": "512x512",
+      "type": "image/png",
+      "purpose": "any maskable"
+    },
+    {
+      "src": "./icon-1024.png",
+      "sizes": "1024x1024",
+      "type": "image/png"
+    }
+  ],
+  "lang": "en-US",
+  "id": "/index.html",
+  "start_url": "./index.html",
+  "display": "standalone",
+  "background_color": "white",
+  "theme_color": "white"
+}

rpn_rs_gui/assets/sw.js

@@ -0,0 +1,30 @@
+var cacheName = 'egui-template-pwa';
+var filesToCache = [
+  './',
+  './index.html',
+  './eframe_template.js',
+  './eframe_template_bg.wasm',
+];
+
+// self.addEventListener('keydown', function (e) {
+//     console.log("Got keydown", e);
+//     e.preventDefault();
+// })
+
+/* Start the service worker and cache all of the app's content */
+self.addEventListener('install', function (e) {
+  e.waitUntil(
+    caches.open(cacheName).then(function (cache) {
+      return cache.addAll(filesToCache);
+    })
+  );
+});
+
+/* Serve cached content when offline */
+self.addEventListener('fetch', function (e) {
+  e.respondWith(
+    caches.match(e.request).then(function (response) {
+      return response || fetch(e.request);
+    })
+  );
+});

rpn_rs_gui/check.sh

@@ -0,0 +1,11 @@
+#!/usr/bin/env bash
+# This scripts runs various CI-like checks in a convenient way.
+set -eux
+
+cargo check --workspace --all-targets
+cargo check --workspace --all-features --lib --target wasm32-unknown-unknown
+cargo fmt --all -- --check
+cargo clippy --workspace --all-targets --all-features --  -D warnings -W clippy::all
+cargo test --workspace --all-targets --all-features
+cargo test --workspace --doc
+trunk build

rpn_rs_gui/index.html

@@ -0,0 +1,140 @@
+<!DOCTYPE html>
+<html>
+<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
+
+<!-- Disable zooming: -->
+<meta name="viewport" content="width=device-width, initial-scale=1.0, user-scalable=no">
+
+<head>
+    <!-- change this to your project name -->
+    <title>RPN RS2</title>
+
+    <!-- config for our rust wasm binary. go to https://trunkrs.dev/assets/#rust for more customization -->
+    <link data-trunk rel="rust" data-wasm-opt="2" />
+    <!-- this is the base url relative to which other urls will be constructed. trunk will insert this from the public-url option -->
+    <base data-trunk-public-url />
+
+    <link data-trunk rel="icon" href="assets/favicon.ico">
+
+
+    <link data-trunk rel="copy-file" href="assets/sw.js" />
+    <link data-trunk rel="copy-file" href="assets/manifest.json" />
+    <link data-trunk rel="copy-file" href="assets/icon-1024.png" />
+    <link data-trunk rel="copy-file" href="assets/icon-256.png" />
+    <link data-trunk rel="copy-file" href="assets/icon_ios_touch_192.png" />
+    <link data-trunk rel="copy-file" href="assets/maskable_icon_x512.png" />
+
+
+    <link rel="manifest" href="manifest.json">
+    <link rel="apple-touch-icon" href="icon_ios_touch_192.png">
+    <meta name="theme-color" media="(prefers-color-scheme: light)" content="white">
+    <meta name="theme-color" media="(prefers-color-scheme: dark)" content="#404040">
+
+    <style>
+        html {
+            /* Remove touch delay: */
+            touch-action: manipulation;
+        }
+
+        body {
+            /* Light mode background color for what is not covered by the egui canvas,
+            or where the egui canvas is translucent. */
+            background: #909090;
+        }
+
+        @media (prefers-color-scheme: dark) {
+            body {
+                /* Dark mode background color for what is not covered by the egui canvas,
+                or where the egui canvas is translucent. */
+                background: #404040;
+            }
+        }
+
+        /* Allow canvas to fill entire web page: */
+        html,
+        body {
+            overflow: hidden;
+            margin: 0 !important;
+            padding: 0 !important;
+            height: 100%;
+            width: 100%;
+        }
+
+        /* Position canvas in center-top: */
+        canvas {
+            margin-right: auto;
+            margin-left: auto;
+            display: block;
+            position: absolute;
+            top: 0%;
+            left: 50%;
+            transform: translate(-50%, 0%);
+        }
+
+        .centered {
+            margin-right: auto;
+            margin-left: auto;
+            display: block;
+            position: absolute;
+            top: 50%;
+            left: 50%;
+            transform: translate(-50%, -50%);
+            color: #f0f0f0;
+            font-size: 24px;
+            font-family: Ubuntu-Light, Helvetica, sans-serif;
+            text-align: center;
+        }
+
+        /* ---------------------------------------------- */
+        /* Loading animation from https://loading.io/css/ */
+        .lds-dual-ring {
+            display: inline-block;
+            width: 24px;
+            height: 24px;
+        }
+
+        .lds-dual-ring:after {
+            content: " ";
+            display: block;
+            width: 24px;
+            height: 24px;
+            margin: 0px;
+            border-radius: 50%;
+            border: 3px solid #fff;
+            border-color: #fff transparent #fff transparent;
+            animation: lds-dual-ring 1.2s linear infinite;
+        }
+
+        @keyframes lds-dual-ring {
+            0% {
+                transform: rotate(0deg);
+            }
+
+            100% {
+                transform: rotate(360deg);
+            }
+        }
+
+    </style>
+</head>
+
+<body>
+    <!-- The WASM code will resize the canvas dynamically -->
+    <!-- the id is hardcoded in main.rs . so, make sure both match. -->
+    <canvas id="the_canvas_id"></canvas>
+
+    <!--Register Service Worker. this will cache the wasm / js scripts for offline use (for PWA functionality). -->
+    <!-- Force refresh (Ctrl + F5) to load the latest files instead of cached files  -->
+    <script>
+        // We disable caching during development so that we always view the latest version.
+        if ('serviceWorker' in navigator && window.location.hash !== "#dev") {
+            window.addEventListener('load', function () {
+                navigator.serviceWorker.register('sw.js');
+            });
+        }
+    </script>
+</body>
+
+</html>
+
+<!-- Powered by egui: https://github.com/emilk/egui/ -->

rpn_rs_gui/src/app.rs

@@ -0,0 +1,539 @@
+use std::collections::HashSet;
+
+use egui::{
+    Align, Button, Color32, Direction, FontData, FontDefinitions, FontFamily, FontId, Frame, Grid,
+    Id, Key, Label, Layout, Margin, PointerButton, Pos2, Rect, RichText, Rounding, ScrollArea,
+    Sense, Stroke, Style, TouchId, TouchPhase, Vec2,
+};
+use egui_extras::{Column, Size, StripBuilder, TableBuilder};
+use rpn_rs::calc::{
+    entries::CalculatorEntry,
+    errors::CalculatorError,
+    types::{CalculatorDisplayMode, CalculatorState},
+    Calculator,
+};
+use tracing::{error, info};
+mod buttons;
+use buttons::CalculatorButton;
+
+use self::buttons::{BUTTON_LAYOUT, BUTTON_LAYOUT_SETTINGS};
+
+const DEFAULT_FONT_SIZE: f32 = 45.0;
+const STACK_FONT_SIZE: f32 = 25.0;
+const DEFAULT_FONT: FontId = FontId::monospace(DEFAULT_FONT_SIZE);
+// const BUTTON_SIZE_WIDTH: Size = Size::remainder();
+// const BUTTON_SIZE_HEIGHT: Size = Size::remainder();
+// const BUTTON_SIZE: Vec2 = Vec2 { x: 67.0, y: 60.0 };
+const BUTTON_SPACING: Vec2 = Vec2 { x: 0.0, y: 0.0 };
+// const BUTTON_PADDING: Vec2 = Vec2 { x: 24.0, y: 5.0 };
+const BUTTON_PADDING: Vec2 = Vec2 { x: 0.0, y: 0.0 };
+
+/// We derive Deserialize/Serialize so we can persist app state on shutdown.
+#[derive(serde::Deserialize, serde::Serialize)]
+#[serde(default)]
+pub struct TemplateApp {
+    calculator: CalculatorInner,
+
+    #[serde(skip)]
+    latest_error: Option<CalculatorError>,
+
+    #[serde(skip)]
+    touches_down: HashSet<ClickTapId>,
+
+    #[serde(skip)]
+    new_touches: Vec<Pos2>,
+}
+
+#[derive(serde::Deserialize, serde::Serialize, Default)]
+#[serde(default)]
+pub struct CalculatorInner {
+    calculator: Calculator,
+
+    #[serde(skip)]
+    error_state: ErrorState,
+}
+
+impl CalculatorInner {
+    fn calculator_input(&mut self, c: char) {
+        let action = if c == '$' {
+            self.calculator.backspace()
+        } else {
+            self.calculator.take_input(c)
+        };
+
+        if let Err(e) = action {
+            self.error_state.errored(e);
+        } else {
+            self.error_state.success();
+        }
+    }
+}
+
+/// Phase of a click or tap
+#[derive(Debug, Clone, Copy)]
+enum ClickPhase {
+    Start,
+    End,
+    Ignored,
+}
+
+/// ID of a click or tap
+///
+/// Required because taps have IDs, but clicks don't
+#[derive(Debug, Clone, Copy, Hash, PartialEq, Eq)]
+enum ClickTapId {
+    Tap(u64),
+    Click(u8),
+}
+
+impl From<&TouchId> for ClickTapId {
+    fn from(value: &TouchId) -> Self {
+        Self::Tap(value.0)
+    }
+}
+
+impl From<&PointerButton> for ClickTapId {
+    fn from(value: &PointerButton) -> Self {
+        Self::Click(*value as u8)
+    }
+}
+
+impl From<&TouchPhase> for ClickPhase {
+    fn from(value: &TouchPhase) -> Self {
+        match value {
+            TouchPhase::Start => Self::Start,
+            TouchPhase::End => Self::End,
+            TouchPhase::Move | TouchPhase::Cancel => Self::Ignored,
+        }
+    }
+}
+
+impl Default for TemplateApp {
+    fn default() -> Self {
+        Self {
+            calculator: CalculatorInner::default(),
+            latest_error: None,
+            touches_down: HashSet::new(),
+            new_touches: Vec::new(),
+        }
+    }
+}
+
+impl TemplateApp {
+    /// Called once before the first frame.
+    pub fn new(cc: &eframe::CreationContext<'_>) -> Self {
+        // This is also where you can customize the look and feel of egui using
+        // `cc.egui_ctx.set_visuals` and `cc.egui_ctx.set_fonts`.
+
+        // Load previous app state (if any).
+        // Note that you must enable the `persistence` feature for this to work.
+        let ret;
+        if let Some(storage) = cc.storage {
+            ret = eframe::get_value(storage, eframe::APP_KEY).unwrap_or_default();
+        } else {
+            ret = Default::default()
+        }
+
+        TemplateApp::initialize_fonts(&cc.egui_ctx);
+
+        ret
+    }
+
+    fn draw_stack(&mut self, ui: &mut egui::Ui) {
+        TableBuilder::new(ui)
+            .stick_to_bottom(true)
+            // .column(Column::auto() )
+            .column(Column::remainder())
+            // .header(20.0, |mut header| {
+            //     header.col(|ui| {
+            //         ui.heading("Entry");
+            //     });
+            //     header.col(|ui| {
+            //         ui.heading("Value");
+            //     });
+            // })
+            .body(|mut body| {
+                for (_idx, entry) in self.calculator.calculator.stack.iter().enumerate().rev() {
+                    body.row(30.0, |mut row| {
+                        // row.col(|ui| {
+                        //     ui.add(Label::new(
+                        //         RichText::new(format!("{idx}"))
+                        //             .background_color(Color32::RED)
+                        //             .font(DEFAULT_FONT)
+                        //             .size(STACK_FONT_SIZE)
+                        //             .color(Color32::WHITE)
+                        //     ));
+                        // });
+                        row.col(|ui| {
+                            ui.add(Label::new(
+                                RichText::new(
+                                    entry.format_entry(&self.calculator.calculator.display_mode),
+                                )
+                                .background_color(Color32::DARK_GRAY)
+                                .font(DEFAULT_FONT)
+                                .size(STACK_FONT_SIZE)
+                                .color(Color32::WHITE),
+                            ));
+                        });
+                    });
+                }
+            });
+    }
+
+    fn draw_error(&mut self, ui: &mut egui::Ui) {
+        if let Some(ref e) = self.latest_error {
+            ui.label(
+                RichText::new(e.to_string())
+                    .font(DEFAULT_FONT)
+                    .size(STACK_FONT_SIZE)
+                    .background_color(Color32::RED)
+                    .color(Color32::WHITE),
+            );
+        }
+    }
+
+    fn draw_input(&mut self, ui: &mut egui::Ui) {
+        ui.painter()
+            .rect_filled(ui.available_rect_before_wrap(), 0.0, Color32::LIGHT_GREEN);
+        ui.label(
+            RichText::new(self.calculator.calculator.get_l())
+                .color(Color32::BLACK)
+                .font(FontId::monospace(30.0)),
+        );
+    }
+
+    fn draw_buttons(&mut self, ui: &mut egui::Ui) {
+        let button_layout = match self.calculator.calculator.state {
+            CalculatorState::Normal => BUTTON_LAYOUT,
+            CalculatorState::WaitingForConstant => return,
+            CalculatorState::WaitingForMacro => return,
+            CalculatorState::WaitingForRegister(_) => return,
+            CalculatorState::WaitingForSetting => BUTTON_LAYOUT_SETTINGS,
+        };
+
+        StripBuilder::new(ui)
+            .sizes(Size::exact(60.0), button_layout.len())
+            // .sizes(Size::remainder(), button_layout.len())
+            .vertical(|mut strip| {
+                for row in button_layout.iter() {
+                    strip.strip(|builder| {
+                        builder
+                            .sizes(Size::remainder(), row.len())
+                            .horizontal(|mut strip| {
+                                for button_definition in row.iter() {
+                                    strip.cell(|ui| {
+                                        let sense = Sense::click();
+
+                                        let label = RichText::new(button_definition.value)
+                                            .font(DEFAULT_FONT)
+                                            .color(Color32::WHITE)
+                                            .background_color(Color32::BLACK);
+
+                                        ui.painter().rect_filled(
+                                            ui.available_rect_before_wrap(),
+                                            0.0,
+                                            Color32::GOLD,
+                                        );
+                                        ui.style_mut().spacing.window_margin = Margin {
+                                            left: 0.0,
+                                            right: 0.0,
+                                            top: 0.0,
+                                            bottom: 0.0,
+                                        };
+
+                                        let max_size = {
+                                            let ret = ui.available_rect_before_wrap();
+                                            Vec2 {
+                                                x: ret.width(),
+                                                y: ret.height(),
+                                            }
+                                        };
+
+                                        ui.vertical_centered(|ui| {
+                                            ui.add_enabled(
+                                                button_definition.enabled,
+                                                Button::new(label)
+                                                    .stroke(Stroke::NONE)
+                                                    .rounding(Rounding::none())
+                                                    .fill(Color32::from_gray(0x12))
+                                                    .min_size(max_size)
+                                                    .sense(sense),
+                                            )
+                                        });
+
+                                        // let button = {
+                                        //     let ret = ui.add_enabled(
+                                        //         button_definition.enabled,
+                                        //         Button::new(label)
+                                        //             .stroke(Stroke::NONE)
+                                        //             .rounding(Rounding::none())
+                                        //             .fill(Color32::from_gray(0x12))
+                                        //             .min_size(max_size)
+                                        //             .sense(sense),
+                                        //     );
+
+                                        //     ret
+                                        // };
+
+                                        // Check if any new touches intersect with this button
+                                        let max_rect = ui.max_rect();
+                                        for touch in self.new_touches.iter() {
+                                            if max_rect.contains(*touch) {
+                                                self.calculator
+                                                    .calculator_input(button_definition.value);
+                                            }
+                                        }
+                                    });
+                                }
+                            });
+                    });
+                }
+            });
+    }
+
+    fn layout() -> Layout {
+        Layout::from_main_dir_and_cross_align(Direction::TopDown, Align::Center)
+            .with_cross_justify(true)
+    }
+
+    fn handle_input(&mut self, i: &egui::InputState) {
+        if i.events.is_empty() {
+            return;
+        }
+
+        for e in i.events.iter() {
+            match e {
+                egui::Event::Text(t) => {
+                    self.calculator.calculator_input(t.chars().next().unwrap());
+                }
+                // egui::Event::Key {
+                //     key: Key::ArrowLeft,
+                //     pressed: true,
+                //     ..
+                // } => {
+                //     self.calculator.calculator_input('<');
+                // }
+                egui::Event::Key {
+                    key: Key::ArrowRight,
+                    pressed: true,
+                    ..
+                } => {
+                    self.calculator.calculator_input('>');
+                }
+                egui::Event::Key {
+                    key: Key::Enter,
+                    pressed: true,
+                    ..
+                } => {
+                    self.calculator.calculator_input(' ');
+                }
+                egui::Event::Touch {
+                    device_id: _,
+                    id,
+                    phase,
+                    pos,
+                    force: _,
+                } => {
+                    self.handle_touch_event(phase.into(), pos.clone(), id);
+                }
+                egui::Event::PointerButton {
+                    pos,
+                    button,
+                    pressed,
+                    modifiers: _,
+                } => self.handle_touch_event(
+                    if *pressed {
+                        ClickPhase::Start
+                    } else {
+                        ClickPhase::End
+                    },
+                    *pos,
+                    button,
+                ),
+
+                egui::Event::Copy
+                | egui::Event::Cut
+                | egui::Event::Paste(_)
+                | egui::Event::Key {
+                    key: _,
+                    pressed: _,
+                    repeat: _,
+                    modifiers: _,
+                }
+                | egui::Event::PointerMoved(_)
+                | egui::Event::PointerGone
+                | egui::Event::Scroll(_)
+                | egui::Event::Zoom(_)
+                | egui::Event::CompositionStart
+                | egui::Event::CompositionUpdate(_)
+                | egui::Event::CompositionEnd(_)
+                | egui::Event::AccessKitActionRequest(_)
+                | egui::Event::MouseWheel {
+                    unit: _,
+                    delta: _,
+                    modifiers: _,
+                }
+                | egui::Event::WindowFocused(_) => continue,
+            }
+        }
+    }
+
+    fn handle_touch_event(&mut self, phase: ClickPhase, pos: Pos2, id: impl Into<ClickTapId>) {
+        let id = id.into();
+        match phase {
+            ClickPhase::Start => {
+                // TODO: This can be way better
+
+                // If this is a brand new touch
+                if !self.touches_down.contains(&id)
+                    // And it isn't a duplicate
+                    // This can occur on phones where touches can be pointer events
+                    && !self.new_touches.contains(&pos)
+                {
+                    self.new_touches.push(pos);
+                }
+                self.touches_down.insert(id);
+            }
+            ClickPhase::End => {
+                self.touches_down.remove(&id);
+            }
+            ClickPhase::Ignored => {}
+        }
+    }
+
+    fn initialize_fonts(egui_ctx: &egui::Context) {
+        info!("Initializing fonts");
+        let mut fonts = FontDefinitions::default();
+
+        fonts.font_data.insert(
+            "LCD_Solid".to_owned(),
+            FontData::from_static(include_bytes!("../LcdSolid-VPzB.ttf")),
+        );
+
+        fonts
+            .families
+            .get_mut(&FontFamily::Monospace)
+            .unwrap()
+            .insert(0, "LCD_Solid".to_owned());
+
+        fonts
+            .families
+            .get_mut(&FontFamily::Monospace)
+            .unwrap()
+            .push("LCD_Solid".to_owned());
+
+        egui_ctx.set_fonts(fonts);
+    }
+}
+
+impl eframe::App for TemplateApp {
+    /// Called by the frame work to save state before shutdown.
+    fn save(&mut self, storage: &mut dyn eframe::Storage) {
+        eframe::set_value(storage, eframe::APP_KEY, self);
+    }
+
+    /// Called each time the UI needs repainting, which may be many times per second.
+    /// Put your widgets into a `SidePanel`, `TopPanel`, `CentralPanel`, `Window` or `Area`.
+    fn update(&mut self, ctx: &egui::Context, _frame: &mut eframe::Frame) {
+        let Self { .. } = self;
+
+        let mut style: Style = (*ctx.style()).clone();
+        style.spacing.button_padding = BUTTON_PADDING;
+        ctx.set_style(style);
+
+        self.calculator.error_state = ErrorState::default();
+
+        egui::CentralPanel::default().show(ctx, |ui| {
+            // ui.with_layout(self.layout, add_contents)
+            ui.input(|i: &egui::InputState| self.handle_input(i));
+
+            StripBuilder::new(ui)
+                // header
+                .size(Size::exact(65.0))
+                // Stack
+                // .size(Size::remainder().at_most(35.0))
+                .size(Size::remainder().at_least(40.0))
+                // Input
+                .size(Size::exact(40.0))
+                // Error
+                .size(Size::exact(20.0))
+                // Buttons
+                .size(Size::exact(450.0))
+                .vertical(|mut strip| {
+                    strip.cell(|ui| {
+                        ui.heading("rpn_rs_gui");
+                        ui.hyperlink("https://gitea.austen-wares.com/stonewareslord/rpn_rs");
+                    });
+                    strip.cell(|ui| {
+                        // Stack
+                        ui.painter().rect_filled(
+                            ui.available_rect_before_wrap(),
+                            0.0,
+                            Color32::LIGHT_GRAY,
+                        );
+                        self.draw_stack(ui);
+                    });
+                    strip.cell(|ui| {
+                        self.draw_input(ui);
+                        // Reset the error state and update `self.latest_error` if required
+                        match std::mem::take(&mut self.calculator.error_state) {
+                            ErrorState::NoModify => {}
+                            ErrorState::Errored(e) => self.latest_error = Some(e),
+                            ErrorState::Clear => self.latest_error = None,
+                        }
+                    });
+                    strip.cell(|ui| {
+                        // Error bar
+                        self.draw_error(ui);
+                    });
+                    strip.cell(|ui| {
+                        // Buttons
+                        self.draw_buttons(ui);
+                    });
+                })
+        });
+
+        self.new_touches.drain(..);
+    }
+}
+
+enum ErrorState {
+    // Do not touch the state of the error
+    NoModify,
+    // There was an error; this was the latest value
+    Errored(CalculatorError),
+    // We should clear the error at the end
+    Clear,
+}
+
+impl ErrorState {
+    fn errored(&mut self, e: CalculatorError) {
+        error!("Calculator input error: {e:?}");
+
+        match self {
+            Self::NoModify | ErrorState::Clear => *self = Self::Errored(e),
+            Self::Errored(_) => {
+                // We already errored, so do not change anything
+            }
+        }
+    }
+    fn success(&mut self) {
+        match self {
+            Self::NoModify => {
+                // There was a success and there was no previous failure, so clear any error value
+                *self = Self::Clear
+            }
+            Self::Errored(_) => {
+                // There was a previous error. We can't clear the error
+            }
+            Self::Clear => {
+                // The calculator error was already removed
+            }
+        }
+    }
+}
+impl Default for ErrorState {
+    fn default() -> ErrorState {
+        ErrorState::NoModify
+    }
+}

rpn_rs_gui/src/app/buttons.rs

@@ -0,0 +1,108 @@
+use rpn_rs::calc::Calculator;
+
+pub struct CalculatorButton {
+    pub value: char,
+    pub help: Option<&'static str>,
+    pub enabled: bool,
+}
+
+impl CalculatorButton {
+    const fn new(value: char, help: Option<&'static str>, enabled: bool) -> Self {
+        Self {
+            value,
+            help,
+            enabled,
+        }
+    }
+}
+
+pub(crate) const BUTTON_LAYOUT_SETTINGS: &[&[CalculatorButton]] = &[
+    &[CalculatorButton::new('q', Some("Exit"), true)],
+    &[
+        CalculatorButton::new('d', Some("Degrees"), true),
+        CalculatorButton::new('r', Some("Radians"), true),
+        CalculatorButton::new('g', Some("Grads"), true),
+    ],
+    &[
+        CalculatorButton::new('_', Some("Default"), true),
+        CalculatorButton::new(',', Some("Comma separated"), true),
+        CalculatorButton::new(' ', Some("Space separated"), true),
+    ],
+    &[
+        CalculatorButton::new('s', Some("Scientific"), true),
+        CalculatorButton::new('S', Some("Scientific (stack precision)"), true),
+    ],
+    &[
+        CalculatorButton::new('e', Some("Engineering"), true),
+        CalculatorButton::new('E', Some("Engineering (stack precision)"), true),
+    ],
+    &[
+        CalculatorButton::new('f', Some("Fixed"), true),
+        CalculatorButton::new('F', Some("Fixed (stack precision)"), true),
+    ],
+    // CalculatorButton::new('w', Some("Do not write settings and stack on quit (default)"), true),
+    // CalculatorButton::new('W', Some("Write stack and settings on quit"), true),
+    // CalculatorButton::new('L', Some("Left align"), true),
+    // CalculatorButton::new('R', Some("Right align"), true),
+];
+
+pub(crate) const BUTTON_LAYOUT: &[&[CalculatorButton]] = &[
+    &[
+        // CalculatorButton::new('s', "Sin", true),
+        CalculatorButton::new('\\', Some("Drop"), true),
+        // TODO: Settings buttons
+        CalculatorButton::new('@', Some("Settings"), true),
+        // CalculatorButton::new(' ', Some("Enter"), true),
+        CalculatorButton::new('>', Some("Swap"), true),
+        CalculatorButton::new('$', Some("Backspace"), true),
+    ],
+    &[
+        // CalculatorButton::new('|', "AbsoluteValue", true),
+        CalculatorButton::new('^', Some("Pow"), true),
+        CalculatorButton::new('U', Some("Redo"), true),
+        CalculatorButton::new('u', Some("Undo"), true),
+        CalculatorButton::new('L', Some("Ln"), true),
+        // CalculatorButton::new('l', Some("Log"), true),
+    ],
+    &[
+        // CalculatorButton::new('c', "Cos", true),
+        CalculatorButton::new('v', Some("Sqrt"), true),
+        // CalculatorButton::new('%', Some("Modulo"), true),
+        CalculatorButton::new('n', Some("Negate"), true),
+        CalculatorButton::new('i', Some("Inverse"), true),
+        CalculatorButton::new('/', Some("Divide"), true),
+    ],
+    &[
+        // CalculatorButton::new('t', "Tan", true),
+        CalculatorButton::new('7', None, true),
+        CalculatorButton::new('8', None, true),
+        CalculatorButton::new('9', None, true),
+        CalculatorButton::new('*', Some("Multiply"), true),
+    ],
+    &[
+        // CalculatorButton::new('S', "ASin", true),
+        CalculatorButton::new('4', None, true),
+        CalculatorButton::new('5', None, true),
+        CalculatorButton::new('6', None, true),
+        CalculatorButton::new('-', Some("Subtract"), true),
+    ],
+    &[
+        // CalculatorButton::new('C', "ACos", true),
+        CalculatorButton::new('1', None, true),
+        CalculatorButton::new('2', None, true),
+        CalculatorButton::new('3', None, true),
+        CalculatorButton::new('+', Some("Add"), true),
+    ],
+    &[
+        // CalculatorButton::new('T', "ATan", true),
+        CalculatorButton::new('0', None, true),
+        CalculatorButton::new('.', Some("Decimal"), true),
+        CalculatorButton::new(' ', Some("Return"), true),
+        CalculatorButton::new(' ', Some("Return"), true),
+    ],
+    // CalculatorButton::new ( '?',  "IntegerDivide", true),
+    // CalculatorButton::new ( 'V',  "BuildVector", true),
+    // CalculatorButton::new ( 'M',  "BuildMatrix", true),
+    // CalculatorButton::new ( '_',  "Deconstruct", true),
+    // CalculatorButton::new ( ', true)',  "Transpose"),
+];

rpn_rs_gui/src/lib.rs

@@ -0,0 +1,4 @@
+#![warn(clippy::all, rust_2018_idioms)]
+
+mod app;
+pub use app::TemplateApp;

rpn_rs_gui/src/main.rs

@@ -0,0 +1,39 @@
+#![warn(clippy::all, rust_2018_idioms)]
+#![cfg_attr(not(debug_assertions), windows_subsystem = "windows")] // hide console window on Windows in release
+
+// When compiling natively:
+#[cfg(not(target_arch = "wasm32"))]
+fn main() -> eframe::Result<()> {
+    // Log to stdout (if you run with `RUST_LOG=debug`).
+    tracing_subscriber::fmt::init();
+
+    let native_options = eframe::NativeOptions::default();
+    eframe::run_native(
+        "RPN RS2",
+        native_options,
+        Box::new(|cc| Box::new(rpn_rs_gui::TemplateApp::new(cc))),
+    )
+}
+
+// when compiling to web using trunk.
+#[cfg(target_arch = "wasm32")]
+fn main() {
+    // Make sure panics are logged using `console.error`.
+    console_error_panic_hook::set_once();
+
+    // Redirect tracing to console.log and friends:
+    tracing_wasm::set_as_global_default();
+
+    let web_options = eframe::WebOptions::default();
+
+    wasm_bindgen_futures::spawn_local(async {
+        eframe::WebRunner::new()
+            .start(
+                "the_canvas_id", // hardcode it
+                web_options,
+                Box::new(|cc| Box::new(rpn_rs_gui::TemplateApp::new(cc))),
+            )
+            .await
+            .expect("failed to start eframe");
+    });
+}

rpn_rs_tui/Cargo.toml

@@ -0,0 +1,14 @@
+[package]
+name = "rpn_rs_tui"
+version = "0.1.0"
+edition = "2021"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]
+rpn_rs = {path=".."}
+crossterm = { version = "0.18" }
+tui = { version = "0.14", default-features = false, features = ["crossterm"] }
+tracing-appender = "0.2.2"
+tracing-subscriber = "0.3.17"
+tracing = "0.1.37"

rpn_rs_tui/src/event.rs

@@ -1,8 +1,9 @@
-use std::iter;
-use std::sync::mpsc;
+use std::{iter, sync::mpsc};
 
-use std::thread;
-use std::time::{Duration, Instant};
+use std::{
+    thread,
+    time::{Duration, Instant},
+};
 
 use crossterm::event::{self, Event as CEvent, KeyEvent};
 
@@ -11,6 +12,7 @@ pub enum Event<I> {
     Tick,
 }
 
+#[allow(dead_code)]
 pub struct Events {
     rx: mpsc::Receiver<Event<KeyEvent>>,
     tx: mpsc::Sender<Event<KeyEvent>>,
@@ -18,7 +20,7 @@ pub struct Events {
 }
 
 impl Events {
-    pub fn new(tick_rate: u64) -> Events {
+    pub fn new(tick_rate: u64) -> Self {
         let (tx, rx) = mpsc::channel();
         let tick_handle = {
             let tx = tx.clone();
@@ -43,16 +45,18 @@ impl Events {
                 }
             })
         };
-        Events {
+        Self {
             tx,
             rx,
             tick_handle,
         }
     }
 
-    /// Returns a chain of the next element (blocking) and a TryIter of everything after it.
+    /// Returns a chain of the next element (blocking) and a `TryIter` of everything after it.
     /// Useful for reading a single Iterator of all elements once after blocking, so there are not too many UI redraws.
-    pub fn blocking_iter(&self) -> Result<impl Iterator<Item = Event<KeyEvent>> + '_, mpsc::RecvError> {
+    pub fn blocking_iter(
+        &self,
+    ) -> Result<impl Iterator<Item = Event<KeyEvent>> + '_, mpsc::RecvError> {
         Ok(iter::once(self.rx.recv()?).chain(self.rx.try_iter()))
     }
 }

rpn_rs_tui/src/main.rs

@@ -1,13 +1,57 @@
-#![allow(unused_variables)]
-#![allow(dead_code)]
+// I am not yet worthy for this yet: clippy::restriction
+#![warn(clippy::all, clippy::pedantic, clippy::nursery, clippy::cargo)]
+// This is intended behavior
+#![allow(clippy::cast_possible_truncation)]
+// Cannot fix this, so don't warn me about it
+#![allow(clippy::multiple_crate_versions)]
 
-mod calc;
+use rpn_rs::{calc, constants};
 mod event;
-mod format;
+use tracing::info;
+
+const BORDER_SIZE: u16 = 2;
+const HELP_TEXT: &str = "\
+                        +       => Add             s      => Sin\n\
+                        -       => Subtract        c      => Cos\n\
+                        /       => Divide          S      => ASin\n\
+                        n       => Negate          C      => ACos\n\
+                        |       => Abs             T      => ATan\n\
+                        i       => Inverse         v      => Sqrt\n\
+                        %       => Modulo          u      => Undo\n\
+                       \\       => Drop            U      => Redo\n\
+                        ?       => IntegerDivide   ^      => Pow\n\
+                        <ret>   => Dup             l      => Log\n\
+                        L       => Ln              e      => *10^\n\
+                        _       => Explode vector or matrix\n\
+                        <right> => Swap            <down> => Edit\n\
+                        uU      => Undo/Redo       `      => Constants\n\
+                        r       => Load Register   R      => Save Register\n\
+                        m       => Macros          @      => Settings\n\
+                        ^s      => Save Config     ^l     => Load Config\
+                        ";
+const SETTINGS_HELP_TEXT: &str = "\
+        d       => Degrees\n\
+        r       => Radians\n\
+        g       => Grads\n\
+        _       => Default\n\
+        ,       => Comma separated\n\
+        <space> => Space separated\n\
+        s       => Scientific\n\
+        S       => Scientific (stack precision)\n\
+        e       => Engineering\n\
+        E       => Engineering (stack precision)\n\
+        f       => Fixed\n\
+        F       => Fixed (stack precision)\n\
+        w       => Do not write settings and stack on quit (default)\n\
+        W       => Write stack and settings on quit\n\
+        L       => Left align\n\
+        R       => Right align\
+        ";
 
 use calc::{
-    constants::{CalculatorDisplayMode, CalculatorState, RegisterState},
+    entries::CalculatorEntry,
     errors::CalculatorResult,
+    types::{CalculatorAlignment, CalculatorState, RegisterState},
     Calculator,
 };
 use crossterm::{
@@ -18,10 +62,10 @@ use crossterm::{
 use event::{Event, Events};
 // use io::stdout;
 
-use std::{cmp, convert::TryFrom, error::Error, io, io::Write};
+use std::{cmp, convert::TryFrom, error::Error, fs::OpenOptions, io, io::Write};
 use tui::{
     backend::CrosstermBackend,
-    layout::{Constraint, Direction, Layout},
+    layout::{Constraint, Direction, Layout, Rect},
     style::{Modifier, Style},
     terminal::Frame,
     text::{Span, Spans, Text},
@@ -56,7 +100,7 @@ impl Default for App {
             Ok(c) => (c, None),
             Err(e) => (Calculator::default(), Some(format!("{}", e))),
         };
-        App {
+        Self {
             calculator,
             error_msg,
             state: AppState::Calculator,
@@ -64,44 +108,33 @@ impl Default for App {
     }
 }
 impl App {
-    fn draw_clippy_dialogs<T: std::io::Write>(&mut self, f: &mut Frame<CrosstermBackend<T>>) {
-        match (&self.state, self.calculator.get_state()) {
+    // This function is long because it contains help text
+    fn draw_clippy_dialogs<T: Write>(&mut self, f: &mut Frame<CrosstermBackend<T>>) {
+        match (&self.state, &self.calculator.state) {
             (AppState::Help, _) => {
                 draw_clippy_rect(
-                    ClippyRectangle {
+                    &ClippyRectangle {
                         title: "Help",
-                        msg: "\
-                                +       => Add             s      => Sin\n\
-                                -       => Subtract        c      => Cos\n\
-                                *       => Multiply        t      => Tan\n\
-                                /       => Divide          S      => ASin\n\
-                                n       => Negate          C      => ACos\n\
-                                |       => Abs             T      => ATan\n\
-                                i       => Inverse         v      => Sqrt\n\
-                                %       => Modulo          u      => Undo\n\
-                               \\       => Drop            U      => Redo\n\
-                                ?       => IntegerDivide   ^      => Pow\n\
-                                <ret>   => Dup             l      => Log\n\
-                                L       => Ln              e      => *10^\n\
-                                <right> => Swap            <down> => Edit\n\
-                                uU      => Undo/Redo       `      => Constants\n\
-                                m       => Macros          rR     => Registers\n\
-                                ^s      => Save Config     ^l     => Load Config\n\
-                                @       => Settings\
-                                ",
+                        msg: HELP_TEXT,
                     },
                     f,
                 );
             }
             (AppState::Calculator, CalculatorState::WaitingForConstant) => {
                 draw_clippy_rect(
-                    ClippyRectangle {
+                    &ClippyRectangle {
                         title: "Constants",
                         msg: self
                             .calculator
-                            .get_constants_iter()
+                            .constants
+                            .iter()
                             .map(|(key, constant)| {
-                                format!("{}: {} ({})", key, constant.help, constant.value)
+                                format!(
+                                    "{}: {} ({})",
+                                    key,
+                                    constant.help,
+                                    constant.value.format_entry(&self.calculator.display_mode)
+                                )
                             })
                             .fold(String::new(), |acc, s| acc + &s + "\n")
                             .trim_end(),
@@ -115,12 +148,19 @@ impl App {
                     RegisterState::Load => "Registers",
                 };
                 draw_clippy_rect(
-                    ClippyRectangle {
+                    &ClippyRectangle {
                         title,
                         msg: self
                             .calculator
-                            .get_registers_iter()
-                            .map(|(key, value)| format!("{}: {}", key, value))
+                            .registers
+                            .iter()
+                            .map(|(key, value)| {
+                                format!(
+                                    "{}: {}",
+                                    key,
+                                    value.format_entry(&self.calculator.display_mode)
+                                )
+                            })
                             .fold(String::new(), |acc, s| acc + &s + "\n")
                             .trim_end(),
                     },
@@ -129,11 +169,12 @@ impl App {
             }
             (AppState::Calculator, CalculatorState::WaitingForMacro) => {
                 draw_clippy_rect(
-                    ClippyRectangle {
+                    &ClippyRectangle {
                         title: "Macros",
                         msg: self
                             .calculator
-                            .get_macros_iter()
+                            .macros
+                            .iter()
                             .map(|(key, mac)| format!("{}: {}", key, mac.help))
                             .fold(String::new(), |acc, s| acc + &s + "\n")
                             .trim_end(),
@@ -143,23 +184,9 @@ impl App {
             }
             (AppState::Calculator, CalculatorState::WaitingForSetting) => {
                 draw_clippy_rect(
-                    ClippyRectangle {
+                    &ClippyRectangle {
                         title: "Settings",
-                        msg: "\
-                                d       => Degrees\n\
-                                r       => Radians\n\
-                                _       => Default\n\
-                                ,       => Comma separated\n\
-                                <space> => Space separated\n\
-                                s       => Scientific\n\
-                                S       => Scientific (stack precision)\n\
-                                e       => Engineering\n\
-                                E       => Engineering (stack precision)\n\
-                                f       => Engineering\n\
-                                F       => Engineering (stack precision)\n\
-                                w       => Do not write settings and stack on quit (default)\n\
-                                W       => Write stack and settings on quit\
-                                ",
+                        msg: SETTINGS_HELP_TEXT,
                     },
                     f,
                 );
@@ -168,21 +195,7 @@ impl App {
         }
     }
 
-    pub fn terminal_draw_func<T: std::io::Write>(&mut self, f: &mut Frame<CrosstermBackend<T>>) {
-        let chunks = Layout::default()
-            .direction(Direction::Vertical)
-            .margin(2)
-            .constraints(
-                [
-                    Constraint::Length(1),
-                    Constraint::Min(1),
-                    Constraint::Length(3),
-                ]
-                .as_ref(),
-            )
-            .split(f.size());
-
-        // Help message
+    fn draw_status_line<T: Write>(&mut self, f: &mut Frame<CrosstermBackend<T>>, chunk: Rect) {
         let msg = match (&self.error_msg, &self.state) {
             (Some(e), _) => vec![
                 Span::raw("Error: "),
@@ -194,16 +207,7 @@ impl App {
                     Span::styled("q", Style::default().add_modifier(Modifier::BOLD)),
                     Span::raw(" to exit, "),
                     Span::styled("h", Style::default().add_modifier(Modifier::BOLD)),
-                    Span::raw(format!(
-                        " for help - [{}] [{}] [{}]",
-                        self.calculator.get_display_mode(),
-                        self.calculator.get_angle_mode(),
-                        if self.calculator.get_save_on_close() {
-                            "W"
-                        } else {
-                            "w"
-                        }
-                    )),
+                    Span::raw(format!(" for help - {}", self.calculator.get_status_line())),
                 ]
             }
             (None, _) => vec![
@@ -214,66 +218,127 @@ impl App {
         };
         let text = Text::from(Spans::from(msg));
         let help_message = Paragraph::new(text);
-        f.render_widget(help_message, chunks[0]);
+        f.render_widget(help_message, chunk);
+    }
 
-        // Stack
-        let mut stack: Vec<ListItem> = self
-            .calculator
-            .get_stack()
-            .iter()
-            .take(chunks[1].height as usize - 2)
-            .enumerate()
-            .rev()
-            .map(|(i, m)| {
-                let content = vec![Spans::from(Span::raw(
-                    match self.calculator.get_display_mode() {
-                        CalculatorDisplayMode::Default => format!("{:>2}: {}", i, *m),
-                        CalculatorDisplayMode::Separated { separator } => {
-                            format!("{:>2}: {}", i, format::separated(*m, *separator))
-                        }
-                        CalculatorDisplayMode::Scientific { precision } => {
-                            format!("{:>2}: {}", i, format::scientific(*m, *precision))
-                        }
-                        CalculatorDisplayMode::Engineering { precision } => {
-                            format!("{:>2}: {}", i, format::engineering(*m, *precision))
-                        }
-                        CalculatorDisplayMode::Fixed { precision } => {
-                            format!("{:>2}: {:.precision$}", i, m, precision = precision)
-                        }
-                    },
-                ))];
-                ListItem::new(content)
-            })
-            .collect();
-
-        for _ in 0..(chunks[1]
-            .height
-            .saturating_sub(stack.len() as u16)
-            .saturating_sub(2))
-        {
-            stack.insert(0, ListItem::new(Span::raw("~")));
-        }
-
-        let stack = List::new(stack).block(Block::default().borders(Borders::ALL).title("Stack"));
-        f.render_widget(stack, chunks[1]);
-
-        // Input box
+    fn draw_input_box<T: Write>(&mut self, f: &mut Frame<CrosstermBackend<T>>, chunk: Rect) {
         let input = Paragraph::new(self.calculator.get_l().as_ref())
             .style(Style::default())
             .block(Block::default().borders(Borders::ALL).title("Input"));
-        f.render_widget(input, chunks[2]);
+        f.render_widget(input, chunk);
 
         f.set_cursor(
-            chunks[2].x + self.calculator.get_l().len() as u16 + 1,
-            chunks[2].y + 1,
+            chunk.x + self.calculator.get_l().len() as u16 + 1,
+            chunk.y + 1,
         );
+    }
+
+    fn draw_stack<T: Write>(&mut self, f: &mut Frame<CrosstermBackend<T>>, chunk: Rect) {
+        let mut stack: Vec<ListItem> = self
+            .calculator
+            .stack
+            .iter()
+            .take(chunk.height.saturating_sub(BORDER_SIZE) as usize)
+            .enumerate()
+            .rev()
+            .map(|(i, m)| {
+                let number = m.format_entry(&self.calculator.display_mode);
+                let content = match self.calculator.calculator_alignment {
+                    CalculatorAlignment::Left => {
+                        format!("{:>2}: {}", i, number)
+                    }
+                    CalculatorAlignment::Right => {
+                        let ret = format!("{} :{:>2}", number, i);
+                        if ret.len() < chunk.width.saturating_sub(BORDER_SIZE) as usize {
+                            format!(
+                                "{: >width$}",
+                                ret,
+                                width = chunk.width.saturating_sub(BORDER_SIZE) as usize
+                            )
+                        } else {
+                            ret
+                        }
+                    }
+                };
+                ListItem::new(Spans::from(Span::raw(content)))
+            })
+            .collect();
+
+        for _ in 0..(chunk
+            .height
+            .saturating_sub(stack.len() as u16)
+            .saturating_sub(BORDER_SIZE))
+        {
+            stack.insert(
+                0,
+                ListItem::new(Span::raw(match self.calculator.calculator_alignment {
+                    CalculatorAlignment::Left => String::from("~"),
+                    CalculatorAlignment::Right => format!(
+                        "{: >width$}",
+                        "~",
+                        width = chunk.width.saturating_sub(BORDER_SIZE) as usize
+                    ),
+                })),
+            );
+        }
+
+        let stack = List::new(stack).block(Block::default().borders(Borders::ALL).title("Stack"));
+        f.render_widget(stack, chunk);
+    }
+
+    pub fn terminal_draw_func<T: Write>(&mut self, f: &mut Frame<CrosstermBackend<T>>) {
+        let chunks = Layout::default()
+            .direction(Direction::Vertical)
+            .margin(BORDER_SIZE)
+            .constraints(
+                [
+                    Constraint::Length(1),
+                    Constraint::Min(1),
+                    Constraint::Length(3),
+                ]
+                .as_ref(),
+            )
+            .split(f.size());
+
+        self.draw_stack(f, chunks[1]);
+        self.draw_input_box(f, chunks[2]);
+        // Draw the status line last in case something above has an error
+        self.draw_status_line(f, chunks[0]);
 
-        // Help text
         self.draw_clippy_dialogs(f);
     }
 }
 
+fn init_logging() {
+    use tracing_subscriber::{filter::LevelFilter, fmt, prelude::*, EnvFilter};
+
+    let file = OpenOptions::new()
+        .create(true)
+        .append(true)
+        .open("/tmp/rpn_rs.log")
+        .unwrap();
+    let (non_blocking_file, _guard) = tracing_appender::non_blocking(file);
+
+    tracing_subscriber::registry()
+        .with(fmt::layer().with_writer(non_blocking_file))
+        // .with(fmt::layer().with_writer(io::stderr))
+        .with(
+            EnvFilter::builder()
+                .with_default_directive(LevelFilter::ERROR.into())
+                .with_env_var("RPN_RS_LOG")
+                .from_env()
+                .unwrap(),
+        )
+        .init();
+
+    info!("Logging initialized");
+}
+
 fn main() -> Result<(), Box<dyn Error>> {
+    if std::env::var("ENABLE_LOGGING").as_ref().map(String::as_str) == Ok("1") {
+        init_logging();
+    }
+
     enable_raw_mode()?;
 
     let mut stdout = io::stdout();
@@ -298,7 +363,7 @@ fn main() -> Result<(), Box<dyn Error>> {
                         Err(e) => Some(format!("{}", e)),
                     };
                 }
-                _ => continue,
+                Event::Tick => continue,
             }
         }
     }
@@ -312,8 +377,10 @@ fn main() -> Result<(), Box<dyn Error>> {
     app.calculator.close().map_err(|e| e.into())
 }
 
+// This function is long since it maps keys to their proper value
+#[allow(clippy::too_many_lines)]
 fn handle_key(app: &mut App, key: KeyEvent) -> CalculatorResult<CalculatorResponse> {
-    match (&app.state, app.calculator.get_state()) {
+    match (&app.state, &app.calculator.state) {
         (AppState::Calculator, CalculatorState::Normal) => match key {
             KeyEvent {
                 code: KeyCode::Char('q'),
@@ -343,6 +410,10 @@ fn handle_key(app: &mut App, key: KeyEvent) -> CalculatorResult<CalculatorRespon
                 code: KeyCode::Enter,
                 modifiers: KeyModifiers::NONE,
             }
+            | KeyEvent {
+                code: KeyCode::Char('j'),
+                modifiers: KeyModifiers::CONTROL,
+            }
             | KeyEvent {
                 code: KeyCode::Char(' '),
                 modifiers: KeyModifiers::NONE,
@@ -381,7 +452,7 @@ fn handle_key(app: &mut App, key: KeyEvent) -> CalculatorResult<CalculatorRespon
                     app.calculator.take_input(c)?;
                 }
             }
-            _ => {}
+            _key_event => {}
         },
         (AppState::Help, _) => match key {
             KeyEvent {
@@ -414,6 +485,14 @@ fn handle_key(app: &mut App, key: KeyEvent) -> CalculatorResult<CalculatorRespon
             } => {
                 app.calculator.take_input(c)?;
             }
+            KeyEvent {
+                code: KeyCode::Char(c),
+                modifiers: KeyModifiers::SHIFT,
+            } => {
+                for c in c.to_uppercase() {
+                    app.calculator.take_input(c)?;
+                }
+            }
             _ => {}
         },
     }
@@ -426,7 +505,7 @@ struct ClippyRectangle<'a> {
 }
 
 impl ClippyRectangle<'_> {
-    // TODO: Make this static somehow
+    // Cannot be static since the clippy rectangle's text can change
     fn size(&self) -> Dimensions {
         let (width, height) = self.msg.lines().fold((0, 0), |(width, height), l| {
             (cmp::max(width, l.len()), height + 1)
@@ -438,15 +517,15 @@ impl ClippyRectangle<'_> {
     }
 }
 
-fn draw_clippy_rect<T: std::io::Write>(c: ClippyRectangle, f: &mut Frame<CrosstermBackend<T>>) {
-    let block = Block::default().title(c.title).borders(Borders::ALL);
+fn draw_clippy_rect<T: Write>(c: &ClippyRectangle, f: &mut Frame<CrosstermBackend<T>>) {
     let dimensions = c.size();
     let popup_layout = Layout::default()
         .direction(Direction::Vertical)
         .constraints(
             [
+                // Padding
                 Constraint::Min(1),
-                Constraint::Length(dimensions.height + 2),
+                Constraint::Length(dimensions.height + BORDER_SIZE),
             ]
             .as_ref(),
         )
@@ -455,8 +534,9 @@ fn draw_clippy_rect<T: std::io::Write>(c: ClippyRectangle, f: &mut Frame<Crosste
         .direction(Direction::Horizontal)
         .constraints(
             [
+                // Padding
                 Constraint::Min(1),
-                Constraint::Length(cmp::max(dimensions.width, c.title.len() as u16) + 2),
+                Constraint::Length(cmp::max(dimensions.width, c.title.len() as u16) + BORDER_SIZE),
             ]
             .as_ref(),
         )

rustfmt.toml

@@ -0,0 +1,2 @@
+unstable_features = true
+imports_granularity = "Crate"

src/calc/constants.rs

@@ -1,114 +0,0 @@
-use serde::{Deserialize, Serialize};
-use std::collections::hash_map::Iter;
-use std::collections::HashMap;
-use std::fmt;
-
-#[derive(Debug, Serialize, Deserialize)]
-pub enum RegisterState {
-    Save,
-    Load,
-}
-
-#[derive(Debug, Serialize, Deserialize)]
-pub enum CalculatorState {
-    Normal,
-    WaitingForConstant,
-    WaitingForMacro,
-    WaitingForRegister(RegisterState),
-    WaitingForSetting,
-}
-
-impl Default for CalculatorState {
-    fn default() -> Self {
-        CalculatorState::Normal
-    }
-}
-
-#[derive(Debug, Clone, Serialize, Deserialize)]
-#[serde(tag = "constant")]
-pub struct CalculatorConstant {
-    pub help: String,
-    pub value: f64,
-}
-
-#[derive(Debug, Clone, Serialize, Deserialize)]
-#[serde(tag = "macro")]
-pub struct CalculatorMacro {
-    pub help: String,
-    pub value: String,
-}
-
-pub type CalculatorConstants = HashMap<char, CalculatorConstant>;
-pub type CalculatorConstantsIter<'a> = Iter<'a, char, CalculatorConstant>;
-
-pub type CalculatorMacros = HashMap<char, CalculatorMacro>;
-pub type CalculatorMacrosIter<'a> = Iter<'a, char, CalculatorMacro>;
-
-pub type CalculatorRegisters = HashMap<char, f64>;
-pub type CalculatorRegistersIter<'a> = Iter<'a, char, f64>;
-
-#[derive(Clone, Debug, Serialize, Deserialize)]
-#[serde(tag = "angle_mode")]
-pub enum CalculatorAngleMode {
-    Degrees,
-    Radians,
-    Grads,
-}
-
-impl Default for CalculatorAngleMode {
-    fn default() -> Self {
-        CalculatorAngleMode::Degrees
-    }
-}
-
-impl fmt::Display for CalculatorAngleMode {
-    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
-        match self {
-            CalculatorAngleMode::Degrees => write!(f, "DEG"),
-            CalculatorAngleMode::Radians => write!(f, "RAD"),
-            CalculatorAngleMode::Grads => write!(f, "GRD"),
-        }
-    }
-}
-
-#[derive(Clone, Debug, Serialize, Deserialize)]
-#[serde(tag = "display_mode")]
-// Could also have added content="precision"
-pub enum CalculatorDisplayMode {
-    Default,
-    Separated { separator: char },
-    Scientific { precision: usize },
-    Engineering { precision: usize },
-    Fixed { precision: usize },
-}
-
-impl fmt::Display for CalculatorDisplayMode {
-    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
-        match self {
-            CalculatorDisplayMode::Default => write!(f, "DEF"),
-            CalculatorDisplayMode::Separated { separator } => write!(f, "SEP({})", separator),
-            CalculatorDisplayMode::Scientific { precision } => write!(f, "SCI({})", precision),
-            CalculatorDisplayMode::Engineering { precision } => write!(f, "ENG({})", precision),
-            CalculatorDisplayMode::Fixed { precision } => write!(f, "FIX({})", precision),
-        }
-    }
-}
-
-impl Default for CalculatorDisplayMode {
-    fn default() -> Self {
-        CalculatorDisplayMode::Default
-    }
-}
-
-// #[derive(Clone, Debug, Serialize, Deserialize)]
-// #[serde(tag = "calculator_alignment")]
-// pub enum CalculatorAlignment {
-//     Right,
-//     Left,
-// }
-
-// impl Default for CalculatorAlignment {
-//     fn default() -> Self {
-//         CalculatorAlignment::Left
-//     }
-// }

src/calc/entries.rs

@@ -0,0 +1,496 @@
+// TODO: Clippy is recommending pass by value instead of by ref, but I plan to add imaginary numbers, which will change this
+#![allow(clippy::trivially_copy_pass_by_ref)]
+mod matrix;
+mod number;
+mod vector;
+use super::errors::CalculatorResult;
+use crate::calc::{types::CalculatorAngleMode, CalculatorDisplayMode};
+pub use matrix::{Matrix, MatrixDimensions};
+pub use number::Number;
+use serde::{Deserialize, Serialize};
+use std::{cmp::PartialEq, fmt};
+pub use vector::{Vector, VectorDirection};
+
+pub trait CalculatorEntry
+where
+    Self: Sized,
+{
+    // Misc
+    fn is_valid(&self) -> bool;
+    /// Turns self into a valid entry
+    fn validate(self) -> CalculatorResult<Entry>;
+    fn format_entry(&self, display_mode: &CalculatorDisplayMode) -> String;
+    fn to_editable_string(&self) -> CalculatorResult<String>;
+    // Mathematical operations
+    // Unary
+    fn negate(&self) -> CalculatorResult<Entry>;
+    fn abs(&self) -> CalculatorResult<Entry>;
+    fn inverse(&self) -> CalculatorResult<Entry>;
+    fn transpose(&self) -> CalculatorResult<Entry>;
+    fn sin(&self, angle_mode: CalculatorAngleMode) -> CalculatorResult<Entry>;
+    fn cos(&self, angle_mode: CalculatorAngleMode) -> CalculatorResult<Entry>;
+    fn tan(&self, angle_mode: CalculatorAngleMode) -> CalculatorResult<Entry>;
+    fn asin(&self, angle_mode: CalculatorAngleMode) -> CalculatorResult<Entry>;
+    fn acos(&self, angle_mode: CalculatorAngleMode) -> CalculatorResult<Entry>;
+    fn atan(&self, angle_mode: CalculatorAngleMode) -> CalculatorResult<Entry>;
+    fn sqrt(&self) -> CalculatorResult<Entry>;
+    fn log(&self) -> CalculatorResult<Entry>;
+    fn ln(&self) -> CalculatorResult<Entry>;
+
+    // Binary
+    fn add(&self, arg: &Entry) -> CalculatorResult<Entry>;
+    fn sub(&self, arg: &Entry) -> CalculatorResult<Entry>;
+    fn mul(&self, arg: &Entry) -> CalculatorResult<Entry>;
+    fn div(&self, arg: &Entry) -> CalculatorResult<Entry>;
+    fn int_divide(&self, arg: &Entry) -> CalculatorResult<Entry>;
+    fn modulo(&self, arg: &Entry) -> CalculatorResult<Entry>;
+    fn pow(&self, arg: &Entry) -> CalculatorResult<Entry>;
+}
+
+#[derive(Clone, PartialEq, Debug, Serialize, Deserialize)]
+#[serde(tag = "type")]
+pub enum Entry {
+    Number(Number),
+    Vector(Vector),
+    Matrix(Matrix),
+}
+
+// macro_rules! op_child_call {
+//         ($a:ident, $op:ident) => {
+//                 match $a {
+//                         Self::Number(number) => number.$op(),
+//                         Self::Vector(vector) => vector.$op(),
+//                 }
+//         };
+//         ($a:ident, $op:ident, $arg:expr) => {
+//                 match $a {
+//                         Self::Number(number) => number.$op($arg),
+//                         Self::Vector(vector) => vector.$op($arg),
+//                 }
+//         };
+// }
+
+impl CalculatorEntry for Entry {
+    fn to_editable_string(&self) -> CalculatorResult<String> {
+        match self {
+            Self::Number(number) => number.to_editable_string(),
+            Self::Vector(vector) => vector.to_editable_string(),
+            Self::Matrix(matrix) => matrix.to_editable_string(),
+        }
+    }
+    fn format_entry(&self, display_mode: &CalculatorDisplayMode) -> String {
+        match self {
+            Self::Number(number) => number.format_entry(display_mode),
+            Self::Vector(vector) => vector.format_entry(display_mode),
+            Self::Matrix(matrix) => matrix.format_entry(display_mode),
+        }
+    }
+    fn is_valid(&self) -> bool {
+        match self {
+            Self::Number(number) => number.is_valid(),
+            Self::Vector(vector) => vector.is_valid(),
+            Self::Matrix(matrix) => matrix.is_valid(),
+        }
+    }
+    fn validate(self) -> CalculatorResult<Entry> {
+        match self {
+            Self::Number(number) => number.validate(),
+            Self::Vector(vector) => vector.validate(),
+            Self::Matrix(matrix) => matrix.validate(),
+        }
+    }
+    fn negate(&self) -> CalculatorResult<Self> {
+        match self {
+            Self::Number(number) => number.negate(),
+            Self::Vector(vector) => vector.negate(),
+            Self::Matrix(matrix) => matrix.negate(),
+        }
+    }
+    fn abs(&self) -> CalculatorResult<Self> {
+        match self {
+            Self::Number(number) => number.abs(),
+            Self::Vector(vector) => vector.abs(),
+            Self::Matrix(matrix) => matrix.abs(),
+        }
+    }
+    fn inverse(&self) -> CalculatorResult<Self> {
+        match self {
+            Self::Number(number) => number.inverse(),
+            Self::Vector(vector) => vector.inverse(),
+            Self::Matrix(matrix) => matrix.inverse(),
+        }
+    }
+    fn transpose(&self) -> CalculatorResult<Self> {
+        match self {
+            Self::Number(number) => number.transpose(),
+            Self::Vector(vector) => vector.transpose(),
+            Self::Matrix(matrix) => matrix.transpose(),
+        }
+    }
+    fn sin(&self, angle_mode: CalculatorAngleMode) -> CalculatorResult<Self> {
+        match self {
+            Self::Number(number) => number.sin(angle_mode),
+            Self::Vector(vector) => vector.sin(angle_mode),
+            Self::Matrix(matrix) => matrix.sin(angle_mode),
+        }
+    }
+    fn cos(&self, angle_mode: CalculatorAngleMode) -> CalculatorResult<Self> {
+        match self {
+            Self::Number(number) => number.cos(angle_mode),
+            Self::Vector(vector) => vector.cos(angle_mode),
+            Self::Matrix(matrix) => matrix.cos(angle_mode),
+        }
+    }
+    fn tan(&self, angle_mode: CalculatorAngleMode) -> CalculatorResult<Self> {
+        match self {
+            Self::Number(number) => number.tan(angle_mode),
+            Self::Vector(vector) => vector.tan(angle_mode),
+            Self::Matrix(matrix) => matrix.tan(angle_mode),
+        }
+    }
+    fn asin(&self, angle_mode: CalculatorAngleMode) -> CalculatorResult<Self> {
+        match self {
+            Self::Number(number) => number.asin(angle_mode),
+            Self::Vector(vector) => vector.asin(angle_mode),
+            Self::Matrix(matrix) => matrix.asin(angle_mode),
+        }
+    }
+    fn acos(&self, angle_mode: CalculatorAngleMode) -> CalculatorResult<Self> {
+        match self {
+            Self::Number(number) => number.acos(angle_mode),
+            Self::Vector(vector) => vector.acos(angle_mode),
+            Self::Matrix(matrix) => matrix.acos(angle_mode),
+        }
+    }
+    fn atan(&self, angle_mode: CalculatorAngleMode) -> CalculatorResult<Self> {
+        match self {
+            Self::Number(number) => number.atan(angle_mode),
+            Self::Vector(vector) => vector.atan(angle_mode),
+            Self::Matrix(matrix) => matrix.atan(angle_mode),
+        }
+    }
+    fn sqrt(&self) -> CalculatorResult<Self> {
+        match self {
+            Self::Number(number) => number.sqrt(),
+            Self::Vector(vector) => vector.sqrt(),
+            Self::Matrix(matrix) => matrix.sqrt(),
+        }
+    }
+    fn log(&self) -> CalculatorResult<Self> {
+        match self {
+            Self::Number(number) => number.log(),
+            Self::Vector(vector) => vector.log(),
+            Self::Matrix(matrix) => matrix.log(),
+        }
+    }
+    fn ln(&self) -> CalculatorResult<Self> {
+        match self {
+            Self::Number(number) => number.ln(),
+            Self::Vector(vector) => vector.ln(),
+            Self::Matrix(matrix) => matrix.ln(),
+        }
+    }
+
+    fn add(&self, arg: &Self) -> CalculatorResult<Self> {
+        match self {
+            Self::Number(number) => number.add(arg),
+            Self::Vector(vector) => vector.add(arg),
+            Self::Matrix(matrix) => matrix.add(arg),
+        }
+    }
+    fn sub(&self, arg: &Self) -> CalculatorResult<Self> {
+        match self {
+            Self::Number(number) => number.sub(arg),
+            Self::Vector(vector) => vector.sub(arg),
+            Self::Matrix(matrix) => matrix.sub(arg),
+        }
+    }
+    fn mul(&self, arg: &Self) -> CalculatorResult<Self> {
+        match self {
+            Self::Number(number) => number.mul(arg),
+            Self::Vector(vector) => vector.mul(arg),
+            Self::Matrix(matrix) => matrix.mul(arg),
+        }
+    }
+    fn div(&self, arg: &Self) -> CalculatorResult<Self> {
+        match self {
+            Self::Number(number) => number.div(arg),
+            Self::Vector(vector) => vector.div(arg),
+            Self::Matrix(matrix) => matrix.div(arg),
+        }
+    }
+    fn int_divide(&self, arg: &Self) -> CalculatorResult<Self> {
+        match self {
+            Self::Number(number) => number.int_divide(arg),
+            Self::Vector(vector) => vector.int_divide(arg),
+            Self::Matrix(matrix) => matrix.int_divide(arg),
+        }
+    }
+    fn modulo(&self, arg: &Self) -> CalculatorResult<Self> {
+        match self {
+            Self::Number(number) => number.modulo(arg),
+            Self::Vector(vector) => vector.modulo(arg),
+            Self::Matrix(matrix) => matrix.modulo(arg),
+        }
+    }
+    fn pow(&self, arg: &Self) -> CalculatorResult<Self> {
+        match self {
+            Self::Number(number) => number.pow(arg),
+            Self::Vector(vector) => vector.pow(arg),
+            Self::Matrix(matrix) => matrix.pow(arg),
+        }
+    }
+}
+
+impl fmt::Display for Entry {
+    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+        match self {
+            Self::Matrix(matrix) => write!(f, "{}", matrix),
+            Self::Vector(vector) => write!(f, "{}", vector),
+            Self::Number(number) => write!(f, "{}", number),
+        }
+    }
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+    use rust_decimal::Decimal;
+    use rust_decimal_macros::dec;
+
+    fn valid_square_matrix() -> Entry {
+        Entry::Matrix(Matrix {
+            dimensions: MatrixDimensions {
+                columns: 3,
+                rows: 3,
+            },
+            vectors: vec![
+                Vector {
+                    direction: VectorDirection::Column,
+                    values: vec![
+                        Number { value: dec!(1.0) },
+                        Number { value: dec!(2.0) },
+                        Number { value: dec!(-3.0) },
+                    ],
+                },
+                Vector {
+                    direction: VectorDirection::Column,
+                    values: vec![
+                        Number { value: dec!(4.0) },
+                        Number { value: dec!(-5.0) },
+                        Number { value: dec!(0.0) },
+                    ],
+                },
+                Vector {
+                    direction: VectorDirection::Column,
+                    values: vec![
+                        Number { value: dec!(-7.0) },
+                        Number { value: dec!(8.0) },
+                        Number { value: dec!(9.0) },
+                    ],
+                },
+            ],
+        })
+    }
+
+    #[test]
+    fn valid_cascading_operations() {
+        for (op, entry, goal) in &[
+            (
+                "negate",
+                valid_square_matrix().negate(),
+                Matrix::from(&[
+                    Entry::Vector(Vector {
+                        direction: VectorDirection::Column,
+                        values: vec![
+                            Number { value: dec!(-1.0) },
+                            Number { value: dec!(-2.0) },
+                            Number { value: dec!(3.0) },
+                        ],
+                    }),
+                    Entry::Vector(Vector {
+                        direction: VectorDirection::Column,
+                        values: vec![
+                            Number { value: dec!(-4.0) },
+                            Number { value: dec!(5.0) },
+                            Number { value: dec!(-0.0) },
+                        ],
+                    }),
+                    Entry::Vector(Vector {
+                        direction: VectorDirection::Column,
+                        values: vec![
+                            Number { value: dec!(7.0) },
+                            Number { value: dec!(-8.0) },
+                            Number { value: dec!(-9.0) },
+                        ],
+                    }),
+                ]),
+            ),
+            // (
+            //     "abs",
+            //     valid_square_matrix().abs(),
+            //     Matrix::from(&[
+            //         Entry::Vector(Vector {
+            //             direction: VectorDirection::Column,
+            //             values: vec![
+            //                 Number { value: dec!(1.0) },
+            //                 Number { value: dec!(2.0) },
+            //                 Number { value: dec!(3.0) },
+            //             ],
+            //         }),
+            //         Entry::Vector(Vector {
+            //             direction: VectorDirection::Column,
+            //             values: vec![
+            //                 Number { value: dec!(4.0) },
+            //                 Number { value: dec!(5.0) },
+            //                 Number { value: dec!(0.0) },
+            //             ],
+            //         }),
+            //         Entry::Vector(Vector {
+            //             direction: VectorDirection::Column,
+            //             values: vec![
+            //                 Number { value: dec!(7.0) },
+            //                 Number { value: dec!(8.0) },
+            //                 Number { value: dec!(9.0) },
+            //             ],
+            //         }),
+            //     ]),
+            // ),
+            // (valid_square_matrix().inverse(), Matrix::from(
+            //     Entry::Vector(Vector {
+            //         direction: VectorDirection::Column,
+            //         values: vec![
+            //         Number{value: dec!(1.0},)
+            //         Number{value: dec!(2.0},)
+            //         Number{value: dec!(-3.0},)
+            //         ]}),
+            //         Entry::Vector (Vector{
+            //             direction: VectorDirection::Column,
+            //         values: vec![
+            //         Number{value: dec!(4.0},)
+            //         Number{value: dec!(-5.0},)
+            //         Number{value: dec!(0.0},)
+            //         ]}),
+            //         Entry::Vector (Vector{
+            //             direction: VectorDirection::Column,
+            //         values: vec![
+            //         Number{value: dec!(-7.0},)
+            //         Number{value: dec!(8.0},)
+            //         Number{value: dec!(9.0},)
+            //         ])),
+            (
+                "transpose",
+                valid_square_matrix().transpose(),
+                Matrix::from(&[
+                    Entry::Vector(Vector {
+                        direction: VectorDirection::Column,
+                        values: vec![
+                            Number { value: dec!(1.0) },
+                            Number { value: dec!(4.0) },
+                            Number { value: dec!(-7.0) },
+                        ],
+                    }),
+                    Entry::Vector(Vector {
+                        direction: VectorDirection::Column,
+                        values: vec![
+                            Number { value: dec!(2.0) },
+                            Number { value: dec!(-5.0) },
+                            Number { value: dec!(8.0) },
+                        ],
+                    }),
+                    Entry::Vector(Vector {
+                        direction: VectorDirection::Column,
+                        values: vec![
+                            Number { value: dec!(-3.0) },
+                            Number { value: dec!(0.0) },
+                            Number { value: dec!(9.0) },
+                        ],
+                    }),
+                ]),
+            ),
+            (
+                "sqrt",
+                (Matrix {
+                    dimensions: MatrixDimensions {
+                        columns: 1,
+                        rows: 3,
+                    },
+                    vectors: vec![Vector {
+                        direction: VectorDirection::Column,
+                        values: vec![
+                            Number { value: dec!(1.0) },
+                            Number { value: dec!(100.0) },
+                            Number { value: dec!(64.0) },
+                        ],
+                    }],
+                })
+                .sqrt(),
+                Matrix::from(&[Entry::Vector(Vector {
+                    direction: VectorDirection::Column,
+                    values: vec![
+                        Number { value: dec!(1.0) },
+                        Number { value: dec!(10.0) },
+                        Number { value: dec!(8.0) },
+                    ],
+                })]),
+            ),
+            // NEWS
+            (
+                "log",
+                (Matrix {
+                    dimensions: MatrixDimensions {
+                        columns: 1,
+                        rows: 3,
+                    },
+                    vectors: vec![Vector {
+                        direction: VectorDirection::Column,
+                        values: vec![
+                            Number { value: dec!(1.0) },
+                            Number { value: dec!(100.0) },
+                            Number {
+                                value: dec!(100_000.0),
+                            },
+                        ],
+                    }],
+                })
+                .log(),
+                Matrix::from(&[Entry::Vector(Vector {
+                    direction: VectorDirection::Column,
+                    values: vec![
+                        Number { value: dec!(0.0) },
+                        Number { value: dec!(2.0) },
+                        Number { value: dec!(5.0) },
+                    ],
+                })]),
+            ),
+            (
+                "ln",
+                (Matrix {
+                    dimensions: MatrixDimensions {
+                        columns: 1,
+                        rows: 3,
+                    },
+                    vectors: vec![Vector {
+                        direction: VectorDirection::Column,
+                        values: vec![
+                            Number { value: dec!(1.0) },
+                            Number {
+                                value: constants::E,
+                            },
+                        ],
+                    }],
+                })
+                .ln(),
+                Matrix::from(&[Entry::Vector(Vector {
+                    direction: VectorDirection::Column,
+                    values: vec![Number { value: dec!(0.0) }, Number { value: dec!(1.0) }],
+                })]),
+            ),
+        ] {
+            println!("Testing: {}", op);
+            let left = entry.as_ref().expect("Operation failed");
+            let right = goal.as_ref().expect("Invalid test goal construction");
+            assert_eq!(left, right);
+        }
+    }
+}

src/calc/entries/matrix.rs

@@ -0,0 +1,352 @@
+use super::{Entry, Number, Vector, VectorDirection};
+use crate::calc::{
+    entries::CalculatorEntry,
+    errors::{CalculatorError, CalculatorResult},
+    types::{CalculatorAngleMode, CalculatorDisplayMode},
+};
+use serde::{Deserialize, Serialize};
+use std::fmt;
+
+#[derive(Clone, PartialEq, Debug, Serialize, Deserialize)]
+pub struct MatrixDimensions {
+    pub rows: usize,
+    pub columns: usize,
+}
+
+impl MatrixDimensions {
+    pub const fn transpose(&self) -> Self {
+        Self {
+            rows: self.columns,
+            columns: self.rows,
+        }
+    }
+}
+
+#[derive(Clone, PartialEq, Debug, Serialize, Deserialize)]
+pub struct Matrix {
+    pub vectors: Vec<Vector>,
+    pub dimensions: MatrixDimensions,
+}
+impl Matrix {
+    pub fn from(entries: &[Entry]) -> CalculatorResult<Entry> {
+        if entries.is_empty() {
+            return Err(CalculatorError::NotEnoughStackEntries);
+        }
+
+        let vectors = entries
+            .iter()
+            .map(|e| match e {
+                Entry::Matrix(_) | Entry::Number(_) => Err(CalculatorError::TypeMismatch),
+                Entry::Vector(vector) => Ok(vector.clone()),
+            })
+            .collect::<CalculatorResult<Vec<Vector>>>()?;
+
+        // Get the num_rows and dimension of the matrix
+        let first_vector = vectors
+            .get(0)
+            .ok_or(CalculatorError::NotEnoughStackEntries)?;
+
+        // The number of rows in this column-based matrix
+        let num_rows = first_vector.values.len();
+        // The direction all vectors must face
+        let vector_direction = first_vector.direction;
+
+        // Either the dimension lengths mismatch, or the vectors are facing different directions (and are longer than 1, since a 1-length vector orientation does not matter
+        if vectors.iter().any(|v| v.values.len() != num_rows)
+            || (num_rows > 1 && vectors.iter().any(|v| v.direction != vector_direction))
+        {
+            return Err(CalculatorError::DimensionMismatch);
+        }
+
+        let dimensions = MatrixDimensions {
+            rows: num_rows,
+            columns: vectors.len(),
+        };
+
+        let ret = Self {
+            vectors,
+            dimensions,
+        };
+
+        // If the user tried making a matrix out of row vectors, we need to transpose it, which forces column vectors
+        if vector_direction == VectorDirection::Row && num_rows > 1 {
+            ret.transpose()
+        } else {
+            ret.validate()
+        }
+    }
+
+    fn iterated_unary(
+        &self,
+        op: impl Fn(&Vector) -> CalculatorResult<Entry>,
+    ) -> CalculatorResult<Entry> {
+        Self {
+            vectors: self
+                .vectors
+                .iter()
+                .map(|v| op(v))
+                .map(|e| match e {
+                    Ok(Entry::Vector(vector)) => Ok(vector),
+                    _ => Err(CalculatorError::ArithmeticError),
+                })
+                .collect::<CalculatorResult<Vec<Vector>>>()?,
+            dimensions: self.dimensions.clone(),
+        }
+        .validate()
+    }
+
+    fn iterated_binary_num(
+        &self,
+        number: &Number,
+        op: impl Fn(&Vector, &Entry) -> CalculatorResult<Entry>,
+    ) -> CalculatorResult<Entry> {
+        Self {
+            vectors: self
+                .vectors
+                .iter()
+                .map(|v| op(v, &Entry::Number(*number)))
+                .map(|e| match e {
+                    Ok(Entry::Vector(vector)) => Ok(vector),
+                    _ => Err(CalculatorError::ArithmeticError),
+                })
+                .collect::<CalculatorResult<Vec<Vector>>>()?,
+            dimensions: self.dimensions.clone(),
+        }
+        .validate()
+    }
+
+    fn iterated_binary_mat(
+        &self,
+        m2: &Self,
+        op: impl Fn(&Vector, &Entry) -> CalculatorResult<Entry>,
+    ) -> CalculatorResult<Entry> {
+        if self.dimensions != m2.dimensions {
+            return Err(CalculatorError::DimensionMismatch);
+        }
+        Self {
+            vectors: self
+                .vectors
+                .iter()
+                .zip(m2.vectors.iter())
+                .map(|(v1, v2)| op(v1, &Entry::Vector(v2.clone())))
+                .map(|e| match e {
+                    Ok(Entry::Vector(vector)) => Ok(vector),
+                    _ => Err(CalculatorError::ArithmeticError),
+                })
+                .collect::<CalculatorResult<Vec<Vector>>>()?,
+            dimensions: self.dimensions.clone(),
+        }
+        .validate()
+    }
+}
+
+impl CalculatorEntry for Matrix {
+    fn to_editable_string(&self) -> CalculatorResult<String> {
+        Err(CalculatorError::TypeMismatch)
+    }
+    fn is_valid(&self) -> bool {
+        // The the number of vectors is equal to the 0th dimension
+        self.vectors.len() == self.dimensions.columns
+        // The number of elements in all vectors are equal to the 1st dimension, and each is valid
+            && self
+                .vectors
+                .iter()
+                .all(|v| v.values.len() == self.dimensions.rows && v.is_valid())
+                // The dimensions are not zero
+                && self.dimensions.rows > 0 && self.dimensions.columns > 0
+    }
+    fn validate(self) -> CalculatorResult<Entry> {
+        if self.is_valid() {
+            Ok(Entry::Matrix(self))
+        } else {
+            Err(CalculatorError::ArithmeticError)
+        }
+    }
+
+    fn format_entry(&self, display_mode: &CalculatorDisplayMode) -> String {
+        format!(
+            "[ {} ]",
+            self.vectors
+                .iter()
+                .map(|vector| vector.format_entry(display_mode))
+                .collect::<Vec<String>>()
+                .join(" ")
+        )
+    }
+
+    // Mathematical operations
+    fn negate(&self) -> CalculatorResult<Entry> {
+        self.iterated_unary(Vector::negate)
+    }
+    fn abs(&self) -> CalculatorResult<Entry> {
+        // TODO: Compute determinant
+        Err(CalculatorError::NotYetImplemented)
+    }
+    fn inverse(&self) -> CalculatorResult<Entry> {
+        // TODO: Inverse
+        Err(CalculatorError::NotYetImplemented)
+    }
+    fn transpose(&self) -> CalculatorResult<Entry> {
+        // Iterate over all rows
+        let mut vectors: Vec<Vector> = vec![];
+        for r in 0..self.dimensions.rows {
+            vectors.push(Vector {
+                values: self
+                    .vectors
+                    .iter()
+                    .map(|v| {
+                        // For each row, get the r'th element to build a new vector
+                        v.values
+                            .get(r)
+                            .map_or_else(|| Err(CalculatorError::DimensionMismatch), |n| Ok(*n))
+                    })
+                    .collect::<CalculatorResult<Vec<Number>>>()?,
+                direction: VectorDirection::Column,
+            });
+        }
+
+        Self {
+            vectors,
+            dimensions: self.dimensions.transpose(),
+        }
+        .validate()
+    }
+    fn sin(&self, angle_mode: CalculatorAngleMode) -> CalculatorResult<Entry> {
+        self.iterated_unary(|v| v.sin(angle_mode))
+    }
+    fn cos(&self, angle_mode: CalculatorAngleMode) -> CalculatorResult<Entry> {
+        self.iterated_unary(|v| v.cos(angle_mode))
+    }
+    fn tan(&self, angle_mode: CalculatorAngleMode) -> CalculatorResult<Entry> {
+        self.iterated_unary(|v| v.tan(angle_mode))
+    }
+    fn asin(&self, angle_mode: CalculatorAngleMode) -> CalculatorResult<Entry> {
+        self.iterated_unary(|v| v.asin(angle_mode))
+    }
+    fn acos(&self, angle_mode: CalculatorAngleMode) -> CalculatorResult<Entry> {
+        self.iterated_unary(|v| v.acos(angle_mode))
+    }
+    fn atan(&self, angle_mode: CalculatorAngleMode) -> CalculatorResult<Entry> {
+        self.iterated_unary(|v| v.atan(angle_mode))
+    }
+    fn sqrt(&self) -> CalculatorResult<Entry> {
+        self.iterated_unary(Vector::sqrt)
+    }
+    fn log(&self) -> CalculatorResult<Entry> {
+        self.iterated_unary(Vector::log)
+    }
+    fn ln(&self) -> CalculatorResult<Entry> {
+        self.iterated_unary(Vector::ln)
+    }
+
+    // Binary
+    fn add(&self, arg: &Entry) -> CalculatorResult<Entry> {
+        match arg {
+            Entry::Matrix(m2) => self.iterated_binary_mat(m2, Vector::add),
+            Entry::Vector(_vector) => Err(CalculatorError::TypeMismatch),
+            Entry::Number(number) => self.iterated_binary_num(number, Vector::add),
+        }
+    }
+    fn sub(&self, arg: &Entry) -> CalculatorResult<Entry> {
+        match arg {
+            Entry::Matrix(m2) => self.iterated_binary_mat(m2, Vector::sub),
+            Entry::Vector(_vector) => Err(CalculatorError::TypeMismatch),
+            Entry::Number(number) => self.iterated_binary_num(number, Vector::sub),
+        }
+    }
+    fn mul(&self, arg: &Entry) -> CalculatorResult<Entry> {
+        match arg {
+            Entry::Matrix(m2) => {
+                if self.dimensions.columns != m2.dimensions.rows {
+                    return Err(CalculatorError::DimensionMismatch);
+                }
+                let dimensions = MatrixDimensions {
+                    rows: self.dimensions.rows,
+                    columns: m2.dimensions.columns,
+                };
+
+                // A matrix is a list of column vectors, so transpose self and zip the columns
+                let transposed_self: Self = match self.transpose()? {
+                    Entry::Matrix(t) => t,
+                    _ => {
+                        return Err(CalculatorError::InternalError(String::from(
+                            "Matrix transpose produced wrong type",
+                        )))
+                    }
+                };
+
+                let mut vectors: Vec<Vector> = vec![];
+
+                for c in &m2.vectors {
+                    let mut vector: Vector = Vector {
+                        values: vec![],
+                        direction: VectorDirection::Column,
+                    };
+                    for r in &transposed_self.vectors {
+                        if let Entry::Number(number) =
+                            c.transpose()?.mul(&Entry::Vector(r.clone()))?
+                        {
+                            vector.values.push(number);
+                        } else {
+                            return Err(CalculatorError::InternalError(String::from(
+                                "Vector multiplication did not produce a number",
+                            )));
+                        }
+                    }
+                    vectors.push(vector);
+                }
+
+                Self {
+                    vectors,
+                    dimensions,
+                }
+                .validate()
+            }
+            Entry::Vector(vector) => self.mul(&Self::from(
+                &[Entry::Vector(vector.clone())], // Treat a vector as a 1D matrix
+            )?),
+            Entry::Number(number) => self.iterated_binary_num(number, Vector::mul),
+        }
+    }
+    fn div(&self, arg: &Entry) -> CalculatorResult<Entry> {
+        match arg {
+            Entry::Matrix(m2) => self.iterated_binary_mat(m2, Vector::div),
+            Entry::Vector(_vector) => Err(CalculatorError::TypeMismatch),
+            Entry::Number(number) => self.iterated_binary_num(number, Vector::div),
+        }
+    }
+    fn int_divide(&self, arg: &Entry) -> CalculatorResult<Entry> {
+        match arg {
+            Entry::Matrix(m2) => self.iterated_binary_mat(m2, Vector::int_divide),
+            Entry::Vector(_vector) => Err(CalculatorError::TypeMismatch),
+            Entry::Number(number) => self.iterated_binary_num(number, Vector::int_divide),
+        }
+    }
+    fn modulo(&self, arg: &Entry) -> CalculatorResult<Entry> {
+        match arg {
+            Entry::Matrix(m2) => self.iterated_binary_mat(m2, Vector::modulo),
+            Entry::Vector(_vector) => Err(CalculatorError::TypeMismatch),
+            Entry::Number(number) => self.iterated_binary_num(number, Vector::modulo),
+        }
+    }
+    fn pow(&self, arg: &Entry) -> CalculatorResult<Entry> {
+        match arg {
+            Entry::Matrix(_m2) => Err(CalculatorError::TypeMismatch),
+            Entry::Vector(_vector) => Err(CalculatorError::TypeMismatch),
+            Entry::Number(number) => self.iterated_binary_num(number, Vector::pow),
+        }
+    }
+}
+impl fmt::Display for Matrix {
+    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+        write!(
+            f,
+            "[ {} ]",
+            self.vectors
+                .iter()
+                .map(|vector| format!("{}", vector))
+                .collect::<Vec<String>>()
+                .join("; ")
+        )
+    }
+}

src/calc/entries/number.rs

@@ -0,0 +1,384 @@
+use super::{Entry, Matrix, Vector};
+use crate::{
+    calc::{
+        entries::CalculatorEntry,
+        errors::{CalculatorError, CalculatorResult},
+        types::{CalculatorAngleMode, CalculatorDisplayMode},
+    },
+    constants,
+};
+use rust_decimal::{Decimal, MathematicalOps};
+use serde::{Deserialize, Serialize};
+use std::fmt;
+
+#[derive(Copy, Clone, Debug, Serialize, Deserialize, PartialEq, Eq)]
+pub struct Number {
+    pub value: Decimal,
+}
+
+// impl PartialEq for Number {
+//     fn eq(&self, other: &Self) -> bool {
+//             (self.value - other.value).abs() < f64::EPSILON
+//         }
+//     }
+// }
+
+impl CalculatorEntry for Number {
+    fn to_editable_string(&self) -> CalculatorResult<String> {
+        Ok(format!("{}", self.value))
+    }
+    fn format_entry(&self, display_mode: &CalculatorDisplayMode) -> String {
+        match display_mode {
+            CalculatorDisplayMode::Default => format!("{}", self.value),
+            CalculatorDisplayMode::Separated { separator } => separated(self.value, *separator),
+            CalculatorDisplayMode::Scientific { precision } => scientific(self.value, *precision),
+            CalculatorDisplayMode::Engineering { precision } => engineering(self.value, *precision),
+            CalculatorDisplayMode::Fixed { precision } => {
+                format!("{:0>.precision$}", self.value, precision = precision)
+            }
+        }
+    }
+    fn is_valid(&self) -> bool {
+        true
+    }
+    fn validate(self) -> CalculatorResult<Entry> {
+        if self.is_valid() {
+            Ok(Entry::Number(self))
+        } else {
+            Err(CalculatorError::ArithmeticError)
+        }
+    }
+
+    fn negate(&self) -> CalculatorResult<Entry> {
+        Ok(Entry::Number(Self { value: -self.value }))
+    }
+    fn abs(&self) -> CalculatorResult<Entry> {
+        Ok(Entry::Number(Self {
+            value: self.value.abs(),
+        }))
+    }
+    fn inverse(&self) -> CalculatorResult<Entry> {
+        Self {
+            value: constants::ONE
+                .checked_div(self.value)
+                .ok_or(CalculatorError::ArithmeticError)?,
+        }
+        .validate()
+    }
+    fn transpose(&self) -> CalculatorResult<Entry> {
+        Err(CalculatorError::TypeMismatch)
+    }
+    fn sin(&self, angle_mode: CalculatorAngleMode) -> CalculatorResult<Entry> {
+        Ok(Entry::Number(Self {
+            value: match angle_mode {
+                CalculatorAngleMode::Degrees => (self.value * constants::DEC_TO_RAD_MULTIPLIER)
+                    .checked_sin()
+                    .ok_or(CalculatorError::ArithmeticError)?,
+                CalculatorAngleMode::Radians => self
+                    .value
+                    .checked_sin()
+                    .ok_or(CalculatorError::ArithmeticError)?,
+                CalculatorAngleMode::Grads => (self.value * constants::GRAD_TO_RAD_MULTIPLIER)
+                    .checked_sin()
+                    .ok_or(CalculatorError::ArithmeticError)?,
+            },
+        }))
+    }
+    fn cos(&self, angle_mode: CalculatorAngleMode) -> CalculatorResult<Entry> {
+        Ok(Entry::Number(Self {
+            value: match angle_mode {
+                CalculatorAngleMode::Degrees => (self.value * constants::DEC_TO_RAD_MULTIPLIER)
+                    .checked_cos()
+                    .ok_or(CalculatorError::ArithmeticError)?,
+                CalculatorAngleMode::Radians => self
+                    .value
+                    .checked_cos()
+                    .ok_or(CalculatorError::ArithmeticError)?,
+                CalculatorAngleMode::Grads => (self.value * constants::GRAD_TO_RAD_MULTIPLIER)
+                    .checked_cos()
+                    .ok_or(CalculatorError::ArithmeticError)?,
+            },
+        }))
+    }
+    fn tan(&self, angle_mode: CalculatorAngleMode) -> CalculatorResult<Entry> {
+        Ok(Entry::Number(Self {
+            value: match angle_mode {
+                CalculatorAngleMode::Degrees => (self.value * constants::DEC_TO_RAD_MULTIPLIER)
+                    .checked_tan()
+                    .ok_or(CalculatorError::ArithmeticError)?,
+                CalculatorAngleMode::Radians => self
+                    .value
+                    .checked_tan()
+                    .ok_or(CalculatorError::ArithmeticError)?,
+                CalculatorAngleMode::Grads => (self.value * constants::GRAD_TO_RAD_MULTIPLIER)
+                    .checked_tan()
+                    .ok_or(CalculatorError::ArithmeticError)?,
+            },
+        }))
+    }
+    fn asin(&self, _angle_mode: CalculatorAngleMode) -> CalculatorResult<Entry> {
+        // TODO: Implement this
+        Err(CalculatorError::NotYetImplemented)
+        // Ok(Entry::Number(Self {
+        //     value: match angle_mode {
+        //         CalculatorAngleMode::Degrees => self.value.asin().to_degrees(),
+        //         CalculatorAngleMode::Radians => self.value.asin(),
+        //         CalculatorAngleMode::Grads => self.value.asin() * 200.0 / std::f64::consts::PI,
+        //     },
+        // }))
+    }
+    fn acos(&self, _angle_mode: CalculatorAngleMode) -> CalculatorResult<Entry> {
+        // TODO: Implement this
+        Err(CalculatorError::NotYetImplemented)
+        // Ok(Entry::Number(Self {
+        //     value: match angle_mode {
+        //         CalculatorAngleMode::Degrees => self.value.acos().to_degrees(),
+        //         CalculatorAngleMode::Radians => self.value.acos(),
+        //         CalculatorAngleMode::Grads => self.value.acos() * 200.0 / std::f64::consts::PI,
+        //     },
+        // }))
+    }
+    fn atan(&self, _angle_mode: CalculatorAngleMode) -> CalculatorResult<Entry> {
+        // TODO: Implement this
+        Err(CalculatorError::NotYetImplemented)
+        // Ok(Entry::Number(Self {
+        //     value: match angle_mode {
+        //         CalculatorAngleMode::Degrees => self.value.atan().to_degrees(),
+        //         CalculatorAngleMode::Radians => self.value.atan(),
+        //         CalculatorAngleMode::Grads => self.value.atan() * 200.0 / std::f64::consts::PI,
+        //     },
+        // }))
+    }
+    fn sqrt(&self) -> CalculatorResult<Entry> {
+        Ok(Entry::Number(Self {
+            value: self.value.sqrt().ok_or(CalculatorError::ArithmeticError)?,
+        }))
+    }
+    fn log(&self) -> CalculatorResult<Entry> {
+        Ok(Entry::Number(Self {
+            value: self
+                .value
+                .checked_log10()
+                .ok_or(CalculatorError::ArithmeticError)?,
+        }))
+    }
+    fn ln(&self) -> CalculatorResult<Entry> {
+        Ok(Entry::Number(Self {
+            value: self
+                .value
+                .checked_ln()
+                .ok_or(CalculatorError::ArithmeticError)?,
+        }))
+    }
+
+    fn add(&self, arg: &Entry) -> CalculatorResult<Entry> {
+        match arg {
+            Entry::Matrix(matrix) => self.iterated_binary_mat(matrix, Self::add),
+            Entry::Vector(vector) => self.iterated_binary_vec(vector, Self::add),
+            Entry::Number(number) => Self {
+                value: self.value + number.value,
+            }
+            .validate(),
+        }
+    }
+    fn sub(&self, arg: &Entry) -> CalculatorResult<Entry> {
+        match arg {
+            Entry::Matrix(matrix) => self.iterated_binary_mat(matrix, Self::sub),
+            Entry::Vector(vector) => self.iterated_binary_vec(vector, Self::sub),
+            Entry::Number(number) => Self {
+                value: self.value - number.value,
+            }
+            .validate(),
+        }
+    }
+    fn mul(&self, arg: &Entry) -> CalculatorResult<Entry> {
+        match arg {
+            Entry::Matrix(matrix) => self.iterated_binary_mat(matrix, Self::mul),
+            Entry::Vector(vector) => self.iterated_binary_vec(vector, Self::mul),
+            Entry::Number(number) => Self {
+                value: self.value * number.value,
+            }
+            .validate(),
+        }
+    }
+    fn div(&self, arg: &Entry) -> CalculatorResult<Entry> {
+        match arg {
+            Entry::Matrix(matrix) => self.iterated_binary_mat(matrix, Self::div),
+            Entry::Vector(vector) => self.iterated_binary_vec(vector, Self::div),
+            Entry::Number(number) => Self {
+                value: self.value / number.value,
+            }
+            .validate(),
+        }
+    }
+    fn int_divide(&self, arg: &Entry) -> CalculatorResult<Entry> {
+        match arg {
+            Entry::Matrix(matrix) => self.iterated_binary_mat(matrix, Self::int_divide),
+            Entry::Vector(vector) => self.iterated_binary_vec(vector, Self::int_divide),
+            Entry::Number(number) => {
+                let q = (self.value / number.value).trunc();
+                Self {
+                    // Implementation based on https://doc.rust-lang.org/src/std/f64.rs.html#263-269
+                    value: if self.value % number.value < constants::ZERO {
+                        if number.value > constants::ZERO {
+                            q - constants::ONE
+                        } else {
+                            q + constants::ONE
+                        }
+                    } else {
+                        q
+                    },
+                }
+            }
+            .validate(),
+        }
+    }
+    fn modulo(&self, arg: &Entry) -> CalculatorResult<Entry> {
+        match arg {
+            Entry::Matrix(matrix) => self.iterated_binary_mat(matrix, Self::modulo),
+            Entry::Vector(vector) => self.iterated_binary_vec(vector, Self::modulo),
+            Entry::Number(number) => Self {
+                value: self.value % number.value,
+            }
+            .validate(),
+        }
+    }
+    fn pow(&self, arg: &Entry) -> CalculatorResult<Entry> {
+        match arg {
+            Entry::Matrix(matrix) => self.iterated_binary_mat(matrix, Self::pow),
+            Entry::Vector(vector) => self.iterated_binary_vec(vector, Self::pow),
+            Entry::Number(number) => Self {
+                value: self
+                    .value
+                    .checked_powd(number.value)
+                    .ok_or(CalculatorError::ArithmeticError)?,
+            }
+            .validate(),
+        }
+    }
+}
+
+impl Number {
+    pub const ZERO: Self = Self {
+        value: constants::ZERO,
+    };
+
+    fn iterated_binary_vec(
+        self,
+        vector: &Vector,
+        op: impl Fn(&Self, &Entry) -> CalculatorResult<Entry>,
+    ) -> CalculatorResult<Entry> {
+        Ok(Entry::Vector(Vector {
+            values: vector
+                .values
+                .iter()
+                .map(|n| op(&self, &Entry::Number(*n)))
+                .map(|e| match e {
+                    // Only numbers are valid in a vector
+                    Ok(Entry::Number(number)) => Ok(number),
+                    _ => Err(CalculatorError::ArithmeticError),
+                })
+                .collect::<CalculatorResult<Vec<Self>>>()?,
+            direction: vector.direction,
+        }))
+    }
+
+    fn iterated_binary_mat(
+        self,
+        matrix: &Matrix,
+        op: impl Fn(&Self, &Entry) -> CalculatorResult<Entry>,
+    ) -> CalculatorResult<Entry> {
+        Matrix {
+            vectors: matrix
+                .vectors
+                .iter()
+                .map(|v| op(&self, &Entry::Vector(v.clone())))
+                .map(|e| match e {
+                    // Only numbers are valid in a vector
+                    Ok(Entry::Vector(vector)) => Ok(vector),
+                    _ => Err(CalculatorError::ArithmeticError),
+                })
+                .collect::<CalculatorResult<Vec<Vector>>>()?,
+            dimensions: matrix.dimensions.clone(),
+        }
+        .validate()
+    }
+}
+impl fmt::Display for Number {
+    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+        write!(f, "{}", self.value)
+    }
+}
+
+// Based on https://stackoverflow.com/a/65266882
+fn scientific(f: Decimal, precision: usize) -> String {
+    let mut ret = format!("{:.precision$E}", f, precision = precision);
+    let exp = ret.split_off(ret.find('E').unwrap_or(0));
+    let (exp_sign, exp) = exp
+        .strip_prefix("E-")
+        .map_or_else(|| ('+', &exp[1..]), |stripped| ('-', stripped));
+
+    let sign = if ret.starts_with('-') { "" } else { " " };
+    format!("{}{} E{}{:0>pad$}", sign, ret, exp_sign, exp, pad = 2)
+}
+
+fn engineering(f: Decimal, precision: usize) -> String {
+    // Format the string so the first digit is always in the first column, and remove '.'. Requested precision + 2 to account for using 1, 2, or 3 digits for the whole portion of the string
+    // 1,000 => 1000E3
+    let all = format!(" {:.precision$E}", f, precision = precision)
+        // Remove . since it can be moved
+        .replacen(".", "", 1)
+        // Add 00E before E here so the length is enough for slicing below
+        .replacen("E", "00E", 1);
+    // Extract mantissa and the string representation of the exponent. Unwrap should be safe as formatter will insert E
+    // 1000E3 => (1000, E3)
+    let (num_str, exp_str) = all.split_at(all.find('E').unwrap());
+    // Extract the exponent as an isize. This should always be true because Entry max will be ~400
+    // E3 => 3 as isize
+    let exp = exp_str[1..].parse::<isize>().unwrap();
+    // Sign of the exponent. If string representation starts with E-, then negative
+    let display_exp_sign = if exp_str.strip_prefix("E-").is_some() {
+        '-'
+    } else {
+        '+'
+    };
+
+    // The exponent to display. Always a multiple of 3 in engineering mode. Always positive because sign is added with display_exp_sign above
+    // 100 => 0, 1000 => 3, .1 => 3 (but will show as -3)
+    let display_exp = (exp.div_euclid(3) * 3).abs();
+    // Number of whole digits. Always 1, 2, or 3 depending on exponent divisibility
+    let num_whole_digits = exp.rem_euclid(3) as usize + 1;
+
+    // If this is a negative number, strip off the added space, otherwise keep the space (and next digit)
+    let num_str = if num_str.strip_prefix(" -").is_some() {
+        &num_str[1..]
+    } else {
+        num_str
+    };
+
+    // Whole portion of number. Slice is safe because the num_whole_digits is always 3 and the num_str will always have length >= 3 since precision in all=2 (+original whole digit)
+    // Original number is 1,000 => whole will be 1, if original is 0.01, whole will be 10
+    let whole = &num_str[0..=num_whole_digits];
+    // Decimal portion of the number. Sliced from the number of whole digits to the *requested* precision. Precision generated in all will be requested precision + 2
+    let decimal = &num_str[(num_whole_digits + 1)..=(precision + num_whole_digits)];
+    // Right align whole portion, always have decimal point
+    format!(
+        "{: >4}.{} E{}{:0>pad$}",
+        // display_sign,
+        whole,
+        decimal,
+        display_exp_sign,
+        display_exp,
+        pad = 2
+    )
+}
+
+fn separated(f: Decimal, sep: char) -> String {
+    let mut ret = f.to_string();
+    let start = if ret.starts_with('-') { 1 } else { 0 };
+    let end = ret.find('.').unwrap_or_else(|| ret.len());
+    for i in 0..((end - start - 1).div_euclid(3)) {
+        ret.insert(end - (i + 1) * 3, sep);
+    }
+    ret
+}

src/calc/entries/vector.rs

@@ -0,0 +1,296 @@
+use super::{Entry, Matrix, Number};
+use crate::{
+    calc::{
+        entries::CalculatorEntry,
+        errors::{CalculatorError, CalculatorResult},
+        types::{CalculatorAngleMode, CalculatorDisplayMode},
+    },
+    constants,
+};
+use serde::{Deserialize, Serialize};
+use std::fmt;
+
+#[derive(PartialEq, Copy, Clone, Debug, Serialize, Deserialize)]
+pub enum VectorDirection {
+    Row,
+    Column,
+}
+
+impl VectorDirection {
+    pub const fn swap(&self) -> Self {
+        match self {
+            Self::Row => Self::Column,
+            Self::Column => Self::Row,
+        }
+    }
+
+    pub const fn get_separator(&self) -> &str {
+        match self {
+            Self::Row => "  ",
+            Self::Column => "; ",
+        }
+    }
+}
+
+impl Default for VectorDirection {
+    fn default() -> Self {
+        // Column vectors are the default
+        Self::Column
+    }
+}
+
+#[derive(Clone, PartialEq, Debug, Serialize, Deserialize)]
+pub struct Vector {
+    pub values: Vec<Number>,
+    pub direction: VectorDirection,
+}
+
+impl CalculatorEntry for Vector {
+    // Misc
+    fn to_editable_string(&self) -> CalculatorResult<String> {
+        // TODO: Eventualy we can parse and edit a vector as a string
+        Err(CalculatorError::TypeMismatch)
+    }
+    fn is_valid(&self) -> bool {
+        self.values.iter().all(|number| number.is_valid())
+    }
+    fn validate(self) -> CalculatorResult<Entry> {
+        if self.is_valid() {
+            Ok(Entry::Vector(self))
+        } else {
+            Err(CalculatorError::ArithmeticError)
+        }
+    }
+
+    fn format_entry(&self, display_mode: &CalculatorDisplayMode) -> String {
+        format!(
+            "[{}]",
+            self.values
+                .iter()
+                .map(|number| number.format_entry(display_mode))
+                .collect::<Vec<String>>()
+                .join(self.direction.get_separator())
+        )
+    }
+    // Mathematical operations
+    fn negate(&self) -> CalculatorResult<Entry> {
+        self.iterated_unary(Number::negate)
+    }
+    fn abs(&self) -> CalculatorResult<Entry> {
+        let value: Entry =
+            self.values
+                .iter()
+                .try_fold(Entry::Number(Number::ZERO), |acc, n2| {
+                    acc.add(&n2.pow(&Entry::Number(Number {
+                        value: constants::TWO,
+                    }))?)
+                })?;
+        value.sqrt()
+    }
+    fn inverse(&self) -> CalculatorResult<Entry> {
+        Err(CalculatorError::TypeMismatch)
+    }
+    fn transpose(&self) -> CalculatorResult<Entry> {
+        Ok(Entry::Vector(Self {
+            values: self.values.clone(),
+            direction: self.direction.swap(),
+        }))
+    }
+    fn sin(&self, angle_mode: CalculatorAngleMode) -> CalculatorResult<Entry> {
+        self.iterated_unary(|n| n.sin(angle_mode))
+    }
+    fn cos(&self, angle_mode: CalculatorAngleMode) -> CalculatorResult<Entry> {
+        self.iterated_unary(|n| n.cos(angle_mode))
+    }
+    fn tan(&self, angle_mode: CalculatorAngleMode) -> CalculatorResult<Entry> {
+        self.iterated_unary(|n| n.tan(angle_mode))
+    }
+    fn asin(&self, angle_mode: CalculatorAngleMode) -> CalculatorResult<Entry> {
+        self.iterated_unary(|n| n.asin(angle_mode))
+    }
+    fn acos(&self, angle_mode: CalculatorAngleMode) -> CalculatorResult<Entry> {
+        self.iterated_unary(|n| n.acos(angle_mode))
+    }
+    fn atan(&self, angle_mode: CalculatorAngleMode) -> CalculatorResult<Entry> {
+        self.iterated_unary(|n| n.atan(angle_mode))
+    }
+    fn sqrt(&self) -> CalculatorResult<Entry> {
+        self.iterated_unary(Number::sqrt)
+    }
+    fn log(&self) -> CalculatorResult<Entry> {
+        self.iterated_unary(Number::log)
+    }
+    fn ln(&self) -> CalculatorResult<Entry> {
+        self.iterated_unary(Number::ln)
+    }
+
+    fn add(&self, arg: &Entry) -> CalculatorResult<Entry> {
+        match arg {
+            Entry::Matrix(_) => Err(CalculatorError::TypeMismatch),
+            Entry::Vector(v2) => self.iterated_binary_vec(v2, Number::add),
+            Entry::Number(number) => self.iterated_binary_num(number, Number::add),
+        }
+    }
+    fn sub(&self, arg: &Entry) -> CalculatorResult<Entry> {
+        match arg {
+            Entry::Matrix(_) => Err(CalculatorError::TypeMismatch),
+            Entry::Vector(v2) => self.iterated_binary_vec(v2, Number::sub),
+            Entry::Number(number) => self.iterated_binary_num(number, Number::sub),
+        }
+    }
+    fn mul(&self, arg: &Entry) -> CalculatorResult<Entry> {
+        match arg {
+            Entry::Matrix(_matrix) => Matrix::from(&[Entry::Vector(self.clone())])?.mul(arg),
+            Entry::Vector(v2) => {
+                if self.values.len() != v2.values.len() {
+                    return Err(CalculatorError::DimensionMismatch);
+                }
+                match (self.direction, v2.direction) {
+                    (VectorDirection::Row, VectorDirection::Column) => {
+                        // Row by column -- will produce a scalar
+                        self.values
+                            .iter()
+                            .zip(v2.values.iter())
+                            .try_fold(Entry::Number(Number::ZERO), |acc, (n1, n2)| {
+                                acc.add(&n1.mul(&Entry::Number(*n2))?)
+                            })
+                    }
+                    (VectorDirection::Column, VectorDirection::Row) => {
+                        Matrix::from(&[Entry::Vector(self.clone())])?
+                            .mul(&Matrix::from(&[arg.clone()])?)
+                    }
+                    (VectorDirection::Row, VectorDirection::Row)
+                    | (VectorDirection::Column, VectorDirection::Column) => {
+                        Err(CalculatorError::DimensionMismatch)
+                    }
+                }
+            }
+            Entry::Number(number) => self.iterated_binary_num(number, Number::mul),
+        }
+    }
+    fn div(&self, arg: &Entry) -> CalculatorResult<Entry> {
+        match arg {
+            Entry::Matrix(_) => Err(CalculatorError::TypeMismatch),
+            Entry::Vector(v2) => self.iterated_binary_vec(v2, Number::div),
+            Entry::Number(number) => self.iterated_binary_num(number, Number::div),
+        }
+    }
+    fn int_divide(&self, arg: &Entry) -> CalculatorResult<Entry> {
+        match arg {
+            Entry::Matrix(_) => Err(CalculatorError::TypeMismatch),
+            Entry::Vector(v2) => self.iterated_binary_vec(v2, Number::int_divide),
+            Entry::Number(number) => self.iterated_binary_num(number, Number::int_divide),
+        }
+    }
+    fn modulo(&self, arg: &Entry) -> CalculatorResult<Entry> {
+        match arg {
+            Entry::Matrix(_) => Err(CalculatorError::TypeMismatch),
+            Entry::Vector(v2) => self.iterated_binary_vec(v2, Number::modulo),
+            Entry::Number(number) => self.iterated_binary_num(number, Number::modulo),
+        }
+    }
+    fn pow(&self, arg: &Entry) -> CalculatorResult<Entry> {
+        match arg {
+            Entry::Matrix(_) => Err(CalculatorError::TypeMismatch),
+            Entry::Vector(v2) => self.iterated_binary_vec(v2, Number::pow),
+            Entry::Number(number) => self.iterated_binary_num(number, Number::pow),
+        }
+    }
+}
+
+impl Vector {
+    pub fn from(entries: &[Entry]) -> CalculatorResult<Entry> {
+        if entries.is_empty() {
+            return Err(CalculatorError::NotEnoughStackEntries);
+        }
+        Self {
+            values: entries
+                .iter()
+                .map(|e| match e {
+                    Entry::Matrix(_) | Entry::Vector(_) => Err(CalculatorError::TypeMismatch),
+                    Entry::Number(number) => Ok(*number),
+                })
+                .collect::<CalculatorResult<Vec<Number>>>()?,
+            direction: VectorDirection::default(),
+        }
+        .validate()
+    }
+
+    fn iterated_unary(
+        &self,
+        op: impl Fn(&Number) -> CalculatorResult<Entry>,
+    ) -> CalculatorResult<Entry> {
+        Ok(Entry::Vector(Self {
+            values: self
+                .values
+                .iter()
+                .map(|n| op(n))
+                .map(|e| match e {
+                    // Only numbers are valid in a vector
+                    Ok(Entry::Number(number)) => Ok(number),
+                    _ => Err(CalculatorError::ArithmeticError),
+                })
+                .collect::<CalculatorResult<Vec<Number>>>()?,
+            direction: self.direction,
+        }))
+    }
+
+    fn iterated_binary_vec(
+        &self,
+        v2: &Self,
+        op: impl Fn(&Number, &Entry) -> CalculatorResult<Entry>,
+    ) -> CalculatorResult<Entry> {
+        if self.values.len() != v2.values.len() {
+            return Err(CalculatorError::DimensionMismatch);
+        }
+        if self.direction != v2.direction {
+            return Err(CalculatorError::DimensionMismatch);
+        }
+        Ok(Entry::Vector(Self {
+            values: self
+                .values
+                .iter()
+                .zip(v2.values.iter())
+                .map(|(n1, n2)| op(n1, &Entry::Number(*n2)))
+                .map(|e| match e {
+                    // Only numbers are valid in a vector
+                    Ok(Entry::Number(number)) => Ok(number),
+                    _ => Err(CalculatorError::ArithmeticError),
+                })
+                .collect::<CalculatorResult<Vec<Number>>>()?,
+            direction: self.direction,
+        }))
+    }
+    fn iterated_binary_num(
+        &self,
+        n2: &Number,
+        op: impl Fn(&Number, &Entry) -> CalculatorResult<Entry>,
+    ) -> CalculatorResult<Entry> {
+        Ok(Entry::Vector(Self {
+            values: self
+                .values
+                .iter()
+                .map(|n| op(n, &Entry::Number(*n2)))
+                .map(|e| match e {
+                    // Only numbers are valid in a vector
+                    Ok(Entry::Number(number)) => Ok(number),
+                    _ => Err(CalculatorError::ArithmeticError),
+                })
+                .collect::<CalculatorResult<Vec<Number>>>()?,
+            direction: self.direction,
+        }))
+    }
+}
+impl fmt::Display for Vector {
+    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+        write!(
+            f,
+            "[{}]",
+            self.values
+                .iter()
+                .map(|number| format!("{}", number))
+                .collect::<Vec<String>>()
+                .join("; ")
+        )
+    }
+}

src/calc/errors.rs

@@ -1,24 +1,46 @@
 use confy::ConfyError;
-use std::error;
-use std::fmt;
+use std::{error, fmt};
 
 pub type CalculatorResult<T> = Result<T, CalculatorError>;
 
+/// All possible errors the calculator can throw
 #[derive(Debug)]
 pub enum CalculatorError {
+    /// Divide by zero, log(-1), etc
     ArithmeticError,
+    /// Not enough stck entries for operation
     NotEnoughStackEntries,
+    /// Requested type does not match target type
+    TypeMismatch,
+    /// Dimensions must match
+    DimensionMismatch,
+    /// Plans are in place to implement, but we are not there yet
+    NotYetImplemented,
+    /// Internal computation error
+    InternalError(String),
+    /// Thrown when an undo or redo cannot be performed
     CorruptStateChange(String),
+    /// Cannot undo or redo
     EmptyHistory(String),
+    /// Constant undefined
     NoSuchConstant(char),
+    /// Register undefined
     NoSuchRegister(char),
+    /// Macro undefined
     NoSuchMacro(char),
+    /// Operator undefined
     NoSuchOperator(char),
+    /// Setting undefined
     NoSuchSetting(char),
+    /// Macro calls itself
     RecursiveMacro(char),
+    /// Could not convert l to number
     ParseError,
+    /// Requested precision is too high
     PrecisionTooHigh,
+    /// Config serialization error
     SaveError(Option<ConfyError>),
+    /// Config deserialization error
     LoadError(Option<ConfyError>),
 }
 
@@ -27,30 +49,36 @@ impl error::Error for CalculatorError {}
 impl fmt::Display for CalculatorError {
     fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
         match self {
-            CalculatorError::ArithmeticError => write!(f, "Arithmetic Error"),
-            CalculatorError::NotEnoughStackEntries => write!(f, "Not enough items in the stack"),
-            CalculatorError::CorruptStateChange(msg) => {
+            Self::ArithmeticError => write!(f, "Arithmetic Error"),
+            Self::NotEnoughStackEntries => write!(f, "Not enough items in the stack"),
+            Self::TypeMismatch => write!(f, "Type mismatch"),
+            Self::DimensionMismatch => write!(f, "Dimension mismatch"),
+            Self::NotYetImplemented => write!(f, "Not yet implemented"),
+            Self::InternalError(msg) => {
+                write!(f, "Internal error: {}", msg)
+            }
+            Self::CorruptStateChange(msg) => {
                 write!(f, "Corrupt state change: {}", msg)
             }
-            CalculatorError::EmptyHistory(msg) => write!(f, "No history to {}", msg),
-            CalculatorError::NoSuchOperator(c) => write!(f, "No such operator '{}'", c),
-            CalculatorError::NoSuchConstant(c) => write!(f, "No such constant '{}'", c),
-            CalculatorError::NoSuchRegister(c) => write!(f, "No such register '{}'", c),
-            CalculatorError::NoSuchMacro(c) => write!(f, "No such macro '{}'", c),
-            CalculatorError::NoSuchSetting(c) => write!(f, "No such setting '{}'", c),
-            CalculatorError::RecursiveMacro(c) => write!(f, "Recursive macro '{}'", c),
-            CalculatorError::ParseError => write!(f, "Parse error"),
-            CalculatorError::PrecisionTooHigh => write!(f, "Precision too high"),
-            CalculatorError::SaveError(None) => write!(f, "Could not save"),
-            CalculatorError::SaveError(Some(ConfyError::SerializeTomlError(e))) => {
+            Self::EmptyHistory(msg) => write!(f, "No history to {}", msg),
+            Self::NoSuchOperator(c) => write!(f, "No such operator '{}'", c),
+            Self::NoSuchConstant(c) => write!(f, "No such constant '{}'", c),
+            Self::NoSuchRegister(c) => write!(f, "No such register '{}'", c),
+            Self::NoSuchMacro(c) => write!(f, "No such macro '{}'", c),
+            Self::NoSuchSetting(c) => write!(f, "No such setting '{}'", c),
+            Self::RecursiveMacro(c) => write!(f, "Recursive macro '{}'", c),
+            Self::ParseError => write!(f, "Parse error"),
+            Self::PrecisionTooHigh => write!(f, "Precision too high"),
+            Self::SaveError(None) => write!(f, "Could not save"),
+            Self::SaveError(Some(ConfyError::SerializeYamlError(e))) => {
                 write!(f, "Save serialization error: {}", e)
             }
-            CalculatorError::SaveError(Some(e)) => write!(f, "Could not save: {}", e),
-            CalculatorError::LoadError(None) => write!(f, "Could not load"),
-            CalculatorError::LoadError(Some(ConfyError::SerializeTomlError(e))) => {
+            Self::SaveError(Some(e)) => write!(f, "Could not save: {}", e),
+            Self::LoadError(None) => write!(f, "Could not load"),
+            Self::LoadError(Some(ConfyError::SerializeYamlError(e))) => {
                 write!(f, "Load serialization error: {}", e)
             }
-            CalculatorError::LoadError(Some(e)) => write!(f, "Could not load: {}", e),
+            Self::LoadError(Some(e)) => write!(f, "Could not load: {}", e),
         }
     }
 }

src/calc/operations.rs

@@ -1,12 +1,8 @@
+use super::entries::Entry;
 use serde::{Deserialize, Serialize};
-#[derive(PartialEq, Debug, Serialize, Deserialize)]
-pub enum MacroState {
-    Start,
-    End,
-}
 
-#[derive(PartialEq, Debug, Serialize, Deserialize)]
-pub enum CalculatorOperation {
+#[derive(PartialEq, Debug, Serialize, Deserialize, Copy, Clone)]
+pub enum ArithmeticOperation {
     Add,
     Subtract,
     Multiply,
@@ -16,10 +12,6 @@ pub enum CalculatorOperation {
     Inverse,
     Modulo,
     IntegerDivide,
-    //Remainder,
-    Drop,
-    Dup,
-    Swap,
     Sin,
     Cos,
     Tan,
@@ -27,24 +19,49 @@ pub enum CalculatorOperation {
     ACos,
     ATan,
     Sqrt,
-    Undo,
-    Redo,
     Pow,
-    // Factorial,
     Log,
     Ln,
-    E,
+}
+/// Operations that can be sent to the calculator such as +, -, or undo
+#[derive(PartialEq, Debug, Serialize, Deserialize, Copy, Clone)]
+pub enum CalculatorOperation {
+    ArithmeticOperation(ArithmeticOperation),
+    BuildVector,
+    BuildMatrix,
+    Deconstruct,
+    Transpose,
+    Undo,
+    Redo,
+    Drop,
+    Dup,
+    Swap,
     Macro(MacroState),
 }
 
+/// Macro bundary; defined by the start or end of a macro invocation
+#[derive(PartialEq, Debug, Serialize, Deserialize, Copy, Clone)]
+pub enum MacroState {
+    Start,
+    End,
+}
+
+/// Arguments for a given operation
 #[derive(PartialEq, Debug, Serialize, Deserialize)]
 pub enum OpArgs {
+    /// This is a macro start and end noop
     Macro(MacroState),
-    Unary(f64),
-    Binary([f64; 2]),
+    /// Operation takes 1 argument, ex: sqrt or negate
+    Unary(Entry),
+    /// Operation takes 2 arguments, ex: + or -
+    Binary([Entry; 2]),
+    /// Some variable number of changes
+    Variable(Vec<Entry>),
+    /// Operation takes no arguments, ex: push
     None,
 }
 
+/// Record of what to pop and push. Used for undo and redo buffers
 #[derive(PartialEq, Debug, Serialize, Deserialize)]
 pub struct CalculatorStateChange {
     pub pop: OpArgs,

src/calc/types.rs

@@ -0,0 +1,224 @@
+use super::entries::Entry;
+use serde::{Deserialize, Serialize};
+use std::{collections::HashMap, fmt};
+
+/// The calculator state
+#[derive(Debug, Serialize, Deserialize)]
+pub enum CalculatorState {
+    Normal,
+    WaitingForConstant,
+    WaitingForMacro,
+    WaitingForRegister(RegisterState),
+    WaitingForSetting,
+}
+
+impl Default for CalculatorState {
+    fn default() -> Self {
+        Self::Normal
+    }
+}
+
+/// The state of the requested register operation
+#[derive(Clone, Copy, Debug, Serialize, Deserialize)]
+pub enum RegisterState {
+    Save,
+    Load,
+}
+
+/// One calculator constant containing a message and value
+#[derive(Debug, Clone, Serialize, Deserialize)]
+pub struct CalculatorConstant {
+    pub help: String,
+    pub value: Entry,
+}
+
+/// One calculator macro containing a messsage and value
+#[derive(Debug, Clone, Serialize, Deserialize)]
+pub struct CalculatorMacro {
+    pub help: String,
+    pub value: String,
+}
+
+/// Map of chars to constants
+pub type CalculatorConstants = HashMap<char, CalculatorConstant>;
+
+/// Map of chars to macros
+pub type CalculatorMacros = HashMap<char, CalculatorMacro>;
+
+/// Map of chars to registers
+pub type CalculatorRegisters = HashMap<char, Entry>;
+
+/// Possible calculator angle modes
+#[derive(Copy, Clone, Debug, Serialize, Deserialize)]
+#[serde(tag = "angle_mode")]
+pub enum CalculatorAngleMode {
+    Degrees,
+    Radians,
+    Grads,
+}
+
+impl Default for CalculatorAngleMode {
+    fn default() -> Self {
+        Self::Degrees
+    }
+}
+
+impl fmt::Display for CalculatorAngleMode {
+    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+        match self {
+            Self::Degrees => write!(f, "DEG"),
+            Self::Radians => write!(f, "RAD"),
+            Self::Grads => write!(f, "GRD"),
+        }
+    }
+}
+
+/// The calculator digit display mode
+#[derive(Clone, Debug, Serialize, Deserialize)]
+#[serde(tag = "display_mode")]
+pub enum CalculatorDisplayMode {
+    /// Rust's default Entry format
+    Default,
+    /// Thousands separator
+    Separated { separator: char },
+    /// Aligned scientific format
+    Scientific { precision: usize },
+    /// Scientific format, chunked by groups of 3
+    ///
+    /// Example: 1 E+5 or 100E+5
+    Engineering { precision: usize },
+    /// Fixed precision
+    Fixed { precision: usize },
+}
+
+impl fmt::Display for CalculatorDisplayMode {
+    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+        match self {
+            Self::Default => write!(f, "DEF"),
+            Self::Separated { separator } => write!(f, "SEP({})", separator),
+            Self::Scientific { precision } => write!(f, "SCI({})", precision),
+            Self::Engineering { precision } => write!(f, "ENG({})", precision),
+            Self::Fixed { precision } => write!(f, "FIX({})", precision),
+        }
+    }
+}
+
+impl Default for CalculatorDisplayMode {
+    fn default() -> Self {
+        Self::Default
+    }
+}
+
+impl CalculatorDisplayMode {}
+
+/// Left or right calculator alignment
+#[derive(Clone, Debug, Serialize, Deserialize)]
+pub enum CalculatorAlignment {
+    Right,
+    Left,
+}
+
+impl Default for CalculatorAlignment {
+    fn default() -> Self {
+        Self::Left
+    }
+}
+
+impl fmt::Display for CalculatorAlignment {
+    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+        match self {
+            Self::Left => write!(f, "L"),
+            Self::Right => write!(f, "R"),
+        }
+    }
+}
+
+// #[cfg(test)]
+// mod tests {
+//         use super::*;
+//         #[test]
+//         fn test_scientific() {
+//                 for (f, precision, s) in vec![
+//                         // Basic
+//                         (1.0, 0, " 1 E+00"),
+//                         (-1.0, 0, "-1 E+00"),
+//                         (100.0, 0, " 1 E+02"),
+//                         (0.1, 0, " 1 E-01"),
+//                         (0.01, 0, " 1 E-02"),
+//                         (-0.1, 0, "-1 E-01"),
+//                         // i
+//                         (1.0, 0, " 1 E+00"),
+//                         // Precision
+//                         (-0.123_456_789, 3, "-1.235 E-01"),
+//                         (-0.123_456_789, 2, "-1.23 E-01"),
+//                         (-0.123_456_789, 2, "-1.23 E-01"),
+//                         (-1e99, 2, "-1.00 E+99"),
+//                         (-1e100, 2, "-1.00 E+100"),
+//                         // Rounding
+//                         (0.5, 2, " 5.00 E-01"),
+//                         (0.5, 1, " 5.0 E-01"),
+//                         (0.5, 0, " 5 E-01"),
+//                         (1.5, 2, " 1.50 E+00"),
+//                         (1.5, 1, " 1.5 E+00"),
+//                         (1.5, 0, " 2 E+00"),
+//                 ] {
+//                         assert_eq!(
+//                                 CalculatorDisplayMode::Scientific { precision }.format_number(f),
+//                                 s
+//                         );
+//                 }
+//         }
+
+//         #[test]
+//         fn test_separated() {
+//                 for (f, separator, s) in vec![
+//                         (100.0, ',', "100"),
+//                         (100.0, ',', "100"),
+//                         (-100.0, ',', "-100"),
+//                         (1_000.0, ',', "1,000"),
+//                         (-1_000.0, ',', "-1,000"),
+//                         (10_000.0, ',', "10,000"),
+//                         (-10_000.0, ',', "-10,000"),
+//                         (100_000.0, ',', "100,000"),
+//                         (-100_000.0, ',', "-100,000"),
+//                         (1_000_000.0, ',', "1,000,000"),
+//                         (-1_000_000.0, ',', "-1,000,000"),
+//                         (1_000_000.123_456_789, ',', "1,000,000.123456789"),
+//                         (-1_000_000.123_456_789, ',', "-1,000,000.123456789"),
+//                         (1_000_000.123_456_789, ' ', "1 000 000.123456789"),
+//                         (1_000_000.123_456_789, ' ', "1 000 000.123456789"),
+//                 ] {
+//                         assert_eq!(
+//                                 CalculatorDisplayMode::Separated { separator }.format_number(f),
+//                                 s
+//                         );
+//                 }
+//         }
+
+//         #[test]
+//         fn test_engineering() {
+//                 for (f, precision, s) in vec![
+//                         (100.0, 3, " 100.000 E+00"),
+//                         (100.0, 3, " 100.000 E+00"),
+//                         (-100.0, 3, "-100.000 E+00"),
+//                         (100.0, 0, " 100. E+00"),
+//                         (-100.0, 0, "-100. E+00"),
+//                         (0.1, 2, " 100.00 E-03"),
+//                         (0.01, 2, "  10.00 E-03"),
+//                         (0.001, 2, "   1.00 E-03"),
+//                         (0.0001, 2, " 100.00 E-06"),
+//                         // Rounding
+//                         (0.5, 2, " 500.00 E-03"),
+//                         (0.5, 1, " 500.0 E-03"),
+//                         (0.5, 0, " 500. E-03"),
+//                         (1.5, 2, "   1.50 E+00"),
+//                         (1.5, 1, "   1.5 E+00"),
+//                         (1.5, 0, "   2. E+00"),
+//                 ] {
+//                         assert_eq!(
+//                                 CalculatorDisplayMode::Engineering { precision }.format_number(f),
+//                                 s
+//                         );
+//                 }
+//         }
+// }

src/constants.rs

@@ -0,0 +1,26 @@
+use rust_decimal::Decimal;
+use rust_decimal_macros::dec;
+
+pub const ZERO: Decimal = Decimal::ZERO;
+pub const ONE: Decimal = Decimal::ONE;
+pub const TWO: Decimal = Decimal::TWO;
+
+pub const PI: Decimal = Decimal::PI;
+pub const E: Decimal = Decimal::E;
+pub const TAU: Decimal = Decimal::TWO_PI;
+
+pub const RAD_TO_DEC_MULTIPLIER: Decimal = dec!(57.295779513082320876798154814);
+pub const DEC_TO_RAD_MULTIPLIER: Decimal = dec!(0.0174532925199432957692369077);
+pub const GRAD_TO_RAD_MULTIPLIER: Decimal = dec!(0.0157079632679489661923132169);
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[test]
+    fn test_constants() {
+        assert_eq!(RAD_TO_DEC_MULTIPLIER, dec!(180.0) / PI);
+        assert_eq!(DEC_TO_RAD_MULTIPLIER, PI / dec!(180.0));
+        assert_eq!(GRAD_TO_RAD_MULTIPLIER, PI / dec!(200.0));
+    }
+}

src/format.rs

@@ -1,155 +0,0 @@
-// Based on https://stackoverflow.com/a/65266882
-pub fn scientific(f: f64, precision: usize) -> String {
-    let mut ret = format!("{:.precision$E}", f, precision = precision);
-    let exp = ret.split_off(ret.find('E').unwrap_or(0));
-    let (exp_sign, exp) = if let Some(stripped) = exp.strip_prefix("E-") {
-        ('-', stripped)
-    } else {
-        ('+', &exp[1..])
-    };
-
-    let sign = if !ret.starts_with('-') { " " } else { "" };
-    format!("{}{} E{}{:0>pad$}", sign, ret, exp_sign, exp, pad = 2)
-}
-
-pub fn engineering(f: f64, precision: usize) -> String {
-    // Format the string so the first digit is always in the first column, and remove '.'. Requested precision + 2 to account for using 1, 2, or 3 digits for the whole portion of the string
-    // 1,000 => 1000E3
-    let all = format!(" {:.precision$E}", f, precision = precision)
-        // Remove . since it can be moved
-        .replacen(".", "", 1)
-        // Add 00E before E here so the length is enough for slicing below
-        .replacen("E", "00E", 1);
-    // Extract mantissa and the string representation of the exponent. Unwrap should be safe as formatter will insert E
-    // 1000E3 => (1000, E3)
-    let (num_str, exp_str) = all.split_at(all.find('E').unwrap());
-    // Extract the exponent as an isize. This should always be true because f64 max will be ~400
-    // E3 => 3 as isize
-    let exp = exp_str[1..].parse::<isize>().unwrap();
-    // Sign of the exponent. If string representation starts with E-, then negative
-    let display_exp_sign = if let Some(stripped) = exp_str.strip_prefix("E-") {
-        '-'
-    } else {
-        '+'
-    };
-
-    // The exponent to display. Always a multiple of 3 in engineering mode. Always positive because sign is added with display_exp_sign above
-    // 100 => 0, 1000 => 3, .1 => 3 (but will show as -3)
-    let display_exp = (exp.div_euclid(3) * 3).abs();
-    // Number of whole digits. Always 1, 2, or 3 depending on exponent divisibility
-    let num_whole_digits = exp.rem_euclid(3) as usize + 1;
-
-    // If this is a negative number, strip off the added space, otherwise keep the space (and next digit)
-    let num_str = if num_str.strip_prefix(" -").is_some() {
-        &num_str[1..]
-    } else {
-        num_str
-    };
-
-    // Whole portion of number. Slice is safe because the num_whole_digits is always 3 and the num_str will always have length >= 3 since precision in all=2 (+original whole digit)
-    // Original number is 1,000 => whole will be 1, if original is 0.01, whole will be 10
-    let whole = &num_str[0..(num_whole_digits + 1)];
-    // Decimal portion of the number. Sliced from the number of whole digits to the *requested* precision. Precision generated in all will be requested precision + 2
-    let decimal = &num_str[(num_whole_digits + 1)..(precision + num_whole_digits + 1)];
-    // Right align whole portion, always have decimal point
-    format!(
-        "{: >4}.{} E{}{:0>pad$}",
-        // display_sign,
-        whole,
-        decimal,
-        display_exp_sign,
-        display_exp,
-        pad = 2
-    )
-}
-
-pub fn separated(f: f64, sep: char) -> String {
-    let mut ret = f.to_string();
-    let start = if ret.starts_with('-') { 1 } else { 0 };
-    let end = ret.find('.').unwrap_or_else(|| ret.len());
-    for i in 0..((end - start - 1).div_euclid(3)) {
-        ret.insert(end - (i + 1) * 3, sep);
-    }
-    ret
-}
-
-#[cfg(test)]
-mod tests {
-    use super::*;
-    #[test]
-    fn test_scientific() {
-        for (f, p, s) in vec![
-            // Basic
-            (1.0, 0, " 1 E+00"),
-            (-1.0, 0, "-1 E+00"),
-            (100.0, 0, " 1 E+02"),
-            (0.1, 0, " 1 E-01"),
-            (0.01, 0, " 1 E-02"),
-            (-0.1, 0, "-1 E-01"),
-            // i
-            (1.0, 0, " 1 E+00"),
-            // Precision
-            (-0.123456789, 3, "-1.235 E-01"),
-            (-0.123456789, 2, "-1.23 E-01"),
-            (-0.123456789, 2, "-1.23 E-01"),
-            (-1e99, 2, "-1.00 E+99"),
-            (-1e100, 2, "-1.00 E+100"),
-            // Rounding
-            (0.5, 2, " 5.00 E-01"),
-            (0.5, 1, " 5.0 E-01"),
-            (0.5, 0, " 5 E-01"),
-            (1.5, 2, " 1.50 E+00"),
-            (1.5, 1, " 1.5 E+00"),
-            (1.5, 0, " 2 E+00"),
-        ] {
-            assert_eq!(scientific(f, p), s);
-        }
-    }
-
-    #[test]
-    fn test_separated() {
-        for (f, c, s) in vec![
-            (100.0, ',', "100"),
-            (100.0, ',', "100"),
-            (-100.0, ',', "-100"),
-            (1_000.0, ',', "1,000"),
-            (-1_000.0, ',', "-1,000"),
-            (10_000.0, ',', "10,000"),
-            (-10_000.0, ',', "-10,000"),
-            (100_000.0, ',', "100,000"),
-            (-100_000.0, ',', "-100,000"),
-            (1_000_000.0, ',', "1,000,000"),
-            (-1_000_000.0, ',', "-1,000,000"),
-            (1_000_000.123456789, ',', "1,000,000.123456789"),
-            (-1_000_000.123456789, ',', "-1,000,000.123456789"),
-            (1_000_000.123456789, ' ', "1 000 000.123456789"),
-            (1_000_000.123456789, ' ', "1 000 000.123456789"),
-        ] {
-            assert_eq!(separated(f, c), s);
-        }
-    }
-
-    #[test]
-    fn test_engineering() {
-        for (f, c, s) in vec![
-            (100.0, 3, " 100.000 E+00"),
-            (100.0, 3, " 100.000 E+00"),
-            (-100.0, 3, "-100.000 E+00"),
-            (100.0, 0, " 100. E+00"),
-            (-100.0, 0, "-100. E+00"),
-            (0.1, 2, " 100.00 E-03"),
-            (0.01, 2, "  10.00 E-03"),
-            (0.001, 2, "   1.00 E-03"),
-            (0.0001, 2, " 100.00 E-06"),
-            // Rounding
-            (0.5, 2, " 500.00 E-03"),
-            (0.5, 1, " 500.0 E-03"),
-            (0.5, 0, " 500. E-03"),
-            (1.5, 2, "   1.50 E+00"),
-            (1.5, 1, "   1.5 E+00"),
-            (1.5, 0, "   2. E+00"),
-        ] {
-            assert_eq!(engineering(f, c), s);
-        }
-    }
-}

src/lib.rs

@@ -0,0 +1,2 @@
+pub mod calc;
+pub mod constants;