408 lines
18 KiB
C
408 lines
18 KiB
C
/*
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* vim:ts=8:expandtab
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*
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* i3 - an improved dynamic tiling window manager
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*
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* © 2009 Michael Stapelberg and contributors
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*
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* See file LICENSE for license information.
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*
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* layout.c: Functions handling layout/drawing of window decorations
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*
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*/
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#include <stdio.h>
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#include <string.h>
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#include <stdlib.h>
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#include <xcb/xcb.h>
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#include <assert.h>
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#include "config.h"
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#include "font.h"
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#include "i3.h"
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#include "xcb.h"
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#include "table.h"
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#include "util.h"
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#include "xinerama.h"
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#include "layout.h"
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/* This macro copies the old value of the given variable, changes the variable to contain
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the new one and returns true if it changed.
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Note that when combining multiple HAS_CHANGED statements, you need to use different variables.
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If someone by chance knows why this is necessary (order of expressions in gcc?) and/or can
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come up with a fix, please mail me. */
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#define HAS_CHANGED(temp, value, new) (temp = value, temp != (value = new))
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static int old_value_1;
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static int old_value_2;
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/*
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* Gets the unoccupied space (= space which is available for windows which were resized by the user)
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* for the given row. This is necessary to render both, customly resized windows and never touched
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* windows correctly, meaning that the aspect ratio will be maintained when opening new windows.
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*
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*/
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int get_unoccupied_x(Workspace *workspace, int row) {
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int unoccupied = workspace->rect.width;
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float default_factor = ((float)workspace->rect.width / workspace->cols) / workspace->rect.width;
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printf("get_unoccupied_x(), starting with %d, default_factor = %f\n", unoccupied, default_factor);
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for (int cols = 0; cols < workspace->cols;) {
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Container *con = workspace->table[cols][row];
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printf("width_factor[%d][%d] = %f, colspan = %d\n", cols, row, con->width_factor, con->colspan);
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if (con->width_factor == 0)
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unoccupied -= workspace->rect.width * default_factor * con->colspan;
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cols += con->colspan;
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}
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assert(unoccupied != 0);
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printf("unoccupied space: %d\n", unoccupied);
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return unoccupied;
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}
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/* See get_unoccupied_x() */
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int get_unoccupied_y(Workspace *workspace, int col) {
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int unoccupied = workspace->rect.height;
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float default_factor = ((float)workspace->rect.height / workspace->rows) / workspace->rect.height;
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printf("get_unoccupied_y(), starting with %d, default_factor = %f\n", unoccupied, default_factor);
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for (int rows = 0; rows < workspace->rows;) {
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Container *con = workspace->table[col][rows];
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printf("height_factor[%d][%d] = %f, rowspan %d\n", col, rows, con->height_factor, con->rowspan);
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if (con->height_factor == 0)
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unoccupied -= workspace->rect.height * default_factor * con->rowspan;
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rows += con->rowspan;
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}
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assert(unoccupied != 0);
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printf("unoccupied space: %d\n", unoccupied);
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return unoccupied;
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}
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/*
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* Redecorates the given client correctly by checking if it’s in a stacking container and
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* re-rendering the stack window or just calling decorate_window if it’s not in a stacking
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* container.
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*
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*/
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void redecorate_window(xcb_connection_t *conn, Client *client) {
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if (client->container->mode == MODE_STACK) {
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render_container(conn, client->container);
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xcb_flush(conn);
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} else decorate_window(conn, client, client->frame, client->titlegc, 0);
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}
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/*
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* (Re-)draws window decorations for a given Client onto the given drawable/graphic context.
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* When in stacking mode, the window decorations are drawn onto an own window.
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*
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*/
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void decorate_window(xcb_connection_t *conn, Client *client, xcb_drawable_t drawable, xcb_gcontext_t gc, int offset) {
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i3Font *font = load_font(conn, config.font);
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uint32_t background_color,
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text_color,
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border_color;
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/* Clients without a container (docks) won’t get decorated */
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if (client->container == NULL)
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return;
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if (client->container->currently_focused == client) {
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/* Distinguish if the window is currently focused… */
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if (CUR_CELL->currently_focused == client)
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background_color = get_colorpixel(conn, client, client->frame, "#285577");
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/* …or if it is the focused window in a not focused container */
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else background_color = get_colorpixel(conn, client, client->frame, "#555555");
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text_color = get_colorpixel(conn, client, client->frame, "#ffffff");
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border_color = get_colorpixel(conn, client, client->frame, "#4c7899");
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} else {
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background_color = get_colorpixel(conn, client, client->frame, "#222222");
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text_color = get_colorpixel(conn, client, client->frame, "#888888");
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border_color = get_colorpixel(conn, client, client->frame, "#333333");
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}
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/* Our plan is the following:
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- Draw a rect around the whole client in background_color
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- Draw two lines in a lighter color
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- Draw the window’s title
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*/
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/* Draw a rectangle in background color around the window */
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xcb_change_gc_single(conn, gc, XCB_GC_FOREGROUND, background_color);
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xcb_rectangle_t rect = {0, offset, client->rect.width, offset + client->rect.height};
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xcb_poly_fill_rectangle(conn, drawable, gc, 1, &rect);
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/* Draw the lines */
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xcb_draw_line(conn, drawable, gc, border_color, 2, offset, client->rect.width, offset);
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xcb_draw_line(conn, drawable, gc, border_color, 2, offset + font->height + 3,
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2 + client->rect.width, offset + font->height + 3);
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/* Draw the font */
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uint32_t mask = XCB_GC_FOREGROUND | XCB_GC_BACKGROUND | XCB_GC_FONT;
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uint32_t values[] = { text_color, background_color, font->id };
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xcb_change_gc(conn, gc, mask, values);
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/* TODO: utf8? */
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char *label;
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asprintf(&label, "(%08x) %.*s", client->frame, client->name_len, client->name);
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xcb_void_cookie_t text_cookie = xcb_image_text_8_checked(conn, strlen(label), drawable,
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gc, 3 /* X */, offset + font->height /* Y = baseline of font */, label);
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check_error(conn, text_cookie, "Could not draw client's title");
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free(label);
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}
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/*
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* Pushes the client’s x and y coordinates to X11
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*
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*/
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static void reposition_client(xcb_connection_t *connection, Client *client) {
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printf("frame needs to be pushed to %dx%d\n", client->rect.x, client->rect.y);
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/* Note: We can use a pointer to client->x like an array of uint32_ts
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because it is followed by client->y by definition */
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xcb_configure_window(connection, client->frame,
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XCB_CONFIG_WINDOW_X | XCB_CONFIG_WINDOW_Y, &(client->rect.x));
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}
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/*
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* Pushes the client’s width/height to X11 and resizes the child window
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*
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*/
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static void resize_client(xcb_connection_t *connection, Client *client) {
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i3Font *font = load_font(connection, config.font);
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printf("resizing client to %d x %d\n", client->rect.width, client->rect.height);
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xcb_configure_window(connection, client->frame,
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XCB_CONFIG_WINDOW_WIDTH | XCB_CONFIG_WINDOW_HEIGHT,
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&(client->rect.width));
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/* Adjust the position of the child inside its frame.
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* The coordinates of the child are relative to its frame, we
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* add a border of 2 pixel to each value */
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uint32_t mask = XCB_CONFIG_WINDOW_X |
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XCB_CONFIG_WINDOW_Y |
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XCB_CONFIG_WINDOW_WIDTH |
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XCB_CONFIG_WINDOW_HEIGHT;
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Rect *rect = &(client->child_rect);
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switch (client->container->mode) {
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case MODE_STACK:
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rect->x = 2;
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rect->y = 0;
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rect->width = client->rect.width - (2 + 2);
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rect->height = client->rect.height - 2;
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break;
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default:
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if (client->titlebar_position == TITLEBAR_OFF) {
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rect->x = 0;
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rect->y = 0;
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rect->width = client->rect.width;
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rect->height = client->rect.height;
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} else {
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rect->x = 2;
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rect->y = font->height + 2 + 2;
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rect->width = client->rect.width - (2 + 2);
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rect->height = client->rect.height - ((font->height + 2 + 2) + 2);
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}
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break;
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}
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printf("child will be at %dx%d with size %dx%d\n", rect->x, rect->y, rect->width, rect->height);
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xcb_configure_window(connection, client->child, mask, &(rect->x));
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/* After configuring a child window we need to fake a configure_notify_event according
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to ICCCM 4.2.3. This seems rather broken, especially since X sends exactly the same
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configure_notify_event automatically according to xtrace. Anyone knows details? */
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xcb_configure_notify_event_t event;
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event.event = client->child;
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event.window = client->child;
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event.response_type = XCB_CONFIGURE_NOTIFY;
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event.x = rect->x;
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event.y = rect->y;
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event.width = rect->width;
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event.height = rect->height;
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event.border_width = 0;
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event.above_sibling = XCB_NONE;
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event.override_redirect = false;
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xcb_send_event(connection, false, client->child, XCB_EVENT_MASK_STRUCTURE_NOTIFY, (char*)&event);
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}
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/*
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* Renders the given container. Is called by render_layout() or individually (for example
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* when focus changes in a stacking container)
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*
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*/
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void render_container(xcb_connection_t *connection, Container *container) {
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Client *client;
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int num_clients = 0, current_client = 0;
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if (container->currently_focused == NULL)
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return;
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CIRCLEQ_FOREACH(client, &(container->clients), clients)
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num_clients++;
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if (container->mode == MODE_DEFAULT) {
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printf("got %d clients in this default container.\n", num_clients);
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CIRCLEQ_FOREACH(client, &(container->clients), clients) {
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/* Check if we changed client->x or client->y by updating it.
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* Note the bitwise OR instead of logical OR to force evaluation of both statements */
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if (client->force_reconfigure |
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HAS_CHANGED(old_value_1, client->rect.x, container->x) |
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HAS_CHANGED(old_value_2, client->rect.y, container->y +
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(container->height / num_clients) * current_client))
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reposition_client(connection, client);
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/* TODO: vertical default layout */
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if (client->force_reconfigure |
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HAS_CHANGED(old_value_1, client->rect.width, container->width) |
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HAS_CHANGED(old_value_2, client->rect.height, container->height / num_clients))
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resize_client(connection, client);
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client->force_reconfigure = false;
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current_client++;
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}
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} else {
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i3Font *font = load_font(connection, config.font);
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int decoration_height = (font->height + 2 + 2);
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struct Stack_Window *stack_win = &(container->stack_win);
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/* Check if we need to remap our stack title window, it gets unmapped when the container
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is empty in src/handlers.c:unmap_notify() */
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if (stack_win->height == 0)
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xcb_map_window(connection, stack_win->window);
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/* Check if we need to reconfigure our stack title window */
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if (HAS_CHANGED(old_value_1, stack_win->width, container->width) |
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HAS_CHANGED(old_value_2, stack_win->height, decoration_height * num_clients)) {
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xcb_configure_window(connection, stack_win->window,
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XCB_CONFIG_WINDOW_WIDTH | XCB_CONFIG_WINDOW_HEIGHT, &(stack_win->width));
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uint32_t values[] = { XCB_STACK_MODE_ABOVE };
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xcb_configure_window(connection, stack_win->window, XCB_CONFIG_WINDOW_STACK_MODE, values);
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}
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/* Reconfigure the currently focused client, if necessary. It is the only visible one */
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client = container->currently_focused;
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/* Check if we changed client->x or client->y by updating it.
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* Note the bitwise OR instead of logical OR to force evaluation of both statements */
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if (client->force_reconfigure |
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HAS_CHANGED(old_value_1, client->rect.x, container->x) |
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HAS_CHANGED(old_value_2, client->rect.y, container->y + (decoration_height * num_clients)))
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reposition_client(connection, client);
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if (client->force_reconfigure |
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HAS_CHANGED(old_value_1, client->rect.width, container->width) |
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HAS_CHANGED(old_value_2, client->rect.height, container->height - (decoration_height * num_clients)))
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resize_client(connection, client);
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client->force_reconfigure = false;
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if (container->workspace->fullscreen_client == NULL) {
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uint32_t values[] = { XCB_STACK_MODE_ABOVE };
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xcb_configure_window(connection, client->frame, XCB_CONFIG_WINDOW_STACK_MODE, values);
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}
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/* Render the decorations of all clients */
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CIRCLEQ_FOREACH(client, &(container->clients), clients)
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decorate_window(connection, client, stack_win->window, stack_win->gc,
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current_client++ * decoration_height);
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}
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}
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static void render_bars(xcb_connection_t *connection, Workspace *r_ws, int width, int height) {
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Client *client;
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SLIST_FOREACH(client, &(r_ws->dock_clients), dock_clients) {
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if (client->force_reconfigure |
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HAS_CHANGED(old_value_1, client->rect.x, 0) |
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HAS_CHANGED(old_value_2, client->rect.y, height))
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reposition_client(connection, client);
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if (client->force_reconfigure |
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HAS_CHANGED(old_value_1, client->rect.width, width) |
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HAS_CHANGED(old_value_2, client->rect.height, client->desired_height))
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resize_client(connection, client);
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client->force_reconfigure = false;
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height += client->desired_height;
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}
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}
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void render_layout(xcb_connection_t *connection) {
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i3Screen *screen;
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TAILQ_FOREACH(screen, virtual_screens, screens) {
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/* r_ws (rendering workspace) is just a shortcut to the Workspace being currently rendered */
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Workspace *r_ws = &(workspaces[screen->current_workspace]);
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printf("Rendering screen %d\n", screen->num);
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if (r_ws->fullscreen_client != NULL)
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/* This is easy: A client has entered fullscreen mode, so we don’t render at all */
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continue;
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int width = r_ws->rect.width;
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int height = r_ws->rect.height;
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/* Reserve space for dock clients */
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Client *client;
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SLIST_FOREACH(client, &(r_ws->dock_clients), dock_clients)
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height -= client->desired_height;
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printf("got %d rows and %d cols\n", r_ws->rows, r_ws->cols);
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int xoffset[r_ws->rows];
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int yoffset[r_ws->cols];
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/* Initialize offsets */
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for (int cols = 0; cols < r_ws->cols; cols++)
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yoffset[cols] = r_ws->rect.y;
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for (int rows = 0; rows < r_ws->rows; rows++)
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xoffset[rows] = r_ws->rect.x;
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/* Go through the whole table and render what’s necessary */
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for (int cols = 0; cols < r_ws->cols; cols++)
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for (int rows = 0; rows < r_ws->rows; rows++) {
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Container *container = r_ws->table[cols][rows];
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printf("\n========\ncontainer has %d colspan, %d rowspan\n",
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container->colspan, container->rowspan);
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printf("container at %d, %d\n", xoffset[rows], yoffset[cols]);
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/* Update position of the container */
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container->row = rows;
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container->col = cols;
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container->x = xoffset[rows];
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container->y = yoffset[cols];
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if (container->width_factor == 0)
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container->width = (width / r_ws->cols);
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else container->width = get_unoccupied_x(r_ws, rows) * container->width_factor;
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container->width *= container->colspan;
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if (container->height_factor == 0)
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container->height = (height / r_ws->rows);
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else container->height = get_unoccupied_y(r_ws, cols) * container->height_factor;
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container->height *= container->rowspan;
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/* Render the container if it is not empty */
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render_container(connection, container);
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xoffset[rows] += container->width;
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yoffset[cols] += container->height;
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printf("==========\n");
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}
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render_bars(connection, r_ws, width, height);
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}
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xcb_flush(connection);
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}
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