1c4100ce5d
This patch creates all necessary windows for i3bar with 32-bit visuals if available. It also introduces the possibility to define RGBA colors (next to RGB colors), which allows the user to set the opacity of any color. This requires running a compositor. With this patch we also start supporting _NET_SYSTEM_TRAY_VISUAL, which is necessary for the tray icons so they create the tray window with the correct depth and visual.
603 lines
22 KiB
C
603 lines
22 KiB
C
/*
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* vim:ts=4:sw=4:expandtab
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*
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* i3 - an improved dynamic tiling window manager
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* © 2009 Michael Stapelberg and contributors (see also: LICENSE)
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*
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* i3-nagbar is a utility which displays a nag message, for example in the case
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* when the user has an error in their configuration file.
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*
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*/
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#include <stdio.h>
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <sys/wait.h>
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#include <stdlib.h>
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#include <stdbool.h>
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#include <unistd.h>
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#include <string.h>
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#include <errno.h>
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#include <err.h>
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#include <stdint.h>
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#include <getopt.h>
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#include <limits.h>
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#include <fcntl.h>
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#include <paths.h>
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#include <xcb/xcb.h>
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#include <xcb/xcb_aux.h>
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#include <xcb/xcb_event.h>
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#include <xcb/randr.h>
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#include "libi3.h"
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#include "i3-nagbar.h"
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static char *argv0 = NULL;
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typedef struct {
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i3String *label;
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char *action;
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int16_t x;
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uint16_t width;
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} button_t;
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static xcb_window_t win;
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static xcb_pixmap_t pixmap;
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static xcb_gcontext_t pixmap_gc;
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static xcb_rectangle_t rect = {0, 0, 600, 20};
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static i3Font font;
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static i3String *prompt;
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static button_t *buttons;
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static int buttoncnt;
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/* Result of get_colorpixel() for the various colors. */
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static uint32_t color_background; /* background of the bar */
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static uint32_t color_button_background; /* background for buttons */
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static uint32_t color_border; /* color of the button border */
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static uint32_t color_border_bottom; /* color of the bottom border */
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static uint32_t color_text; /* color of the text */
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xcb_window_t root;
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xcb_connection_t *conn;
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xcb_screen_t *root_screen;
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/*
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* Having verboselog(), errorlog() and debuglog() is necessary when using libi3.
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*
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*/
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void verboselog(char *fmt, ...) {
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va_list args;
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va_start(args, fmt);
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vfprintf(stdout, fmt, args);
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va_end(args);
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}
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void errorlog(char *fmt, ...) {
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va_list args;
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va_start(args, fmt);
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vfprintf(stderr, fmt, args);
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va_end(args);
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}
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void debuglog(char *fmt, ...) {
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}
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/*
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* Starts the given application by passing it through a shell. We use double fork
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* to avoid zombie processes. As the started application’s parent exits (immediately),
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* the application is reparented to init (process-id 1), which correctly handles
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* childs, so we don’t have to do it :-).
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*
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* The shell is determined by looking for the SHELL environment variable. If it
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* does not exist, /bin/sh is used.
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*
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*/
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static void start_application(const char *command) {
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printf("executing: %s\n", command);
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if (fork() == 0) {
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/* Child process */
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setsid();
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if (fork() == 0) {
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/* This is the child */
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execl(_PATH_BSHELL, _PATH_BSHELL, "-c", command, (void *)NULL);
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/* not reached */
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}
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exit(0);
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}
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wait(0);
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}
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static button_t *get_button_at(int16_t x, int16_t y) {
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for (int c = 0; c < buttoncnt; c++)
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if (x >= (buttons[c].x) && x <= (buttons[c].x + buttons[c].width))
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return &buttons[c];
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return NULL;
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}
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static void handle_button_press(xcb_connection_t *conn, xcb_button_press_event_t *event) {
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printf("button pressed on x = %d, y = %d\n",
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event->event_x, event->event_y);
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/* TODO: set a flag for the button, re-render */
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}
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/*
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* Called when the user releases the mouse button. Checks whether the
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* coordinates are over a button and executes the appropriate action.
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*
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*/
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static void handle_button_release(xcb_connection_t *conn, xcb_button_release_event_t *event) {
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printf("button released on x = %d, y = %d\n",
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event->event_x, event->event_y);
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/* If the user hits the close button, we exit(0) */
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if (event->event_x >= (rect.width - logical_px(32)))
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exit(0);
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button_t *button = get_button_at(event->event_x, event->event_y);
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if (!button)
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return;
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/* We need to create a custom script containing our actual command
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* since not every terminal emulator which is contained in
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* i3-sensible-terminal supports -e with multiple arguments (and not
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* all of them support -e with one quoted argument either).
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*
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* NB: The paths need to be unique, that is, don’t assume users close
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* their nagbars at any point in time (and they still need to work).
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* */
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char *script_path = get_process_filename("nagbar-cmd");
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int fd = open(script_path, O_WRONLY | O_CREAT | O_TRUNC, S_IRUSR | S_IWUSR);
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if (fd == -1) {
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warn("Could not create temporary script to store the nagbar command");
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return;
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}
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FILE *script = fdopen(fd, "w");
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if (script == NULL) {
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warn("Could not fdopen() temporary script to store the nagbar command");
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return;
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}
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fprintf(script, "#!/bin/sh\nrm %s\n%s", script_path, button->action);
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/* Also closes fd */
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fclose(script);
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char *link_path;
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char *exe_path = get_exe_path(argv0);
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sasprintf(&link_path, "%s.nagbar_cmd", script_path);
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if (symlink(exe_path, link_path) == -1) {
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err(EXIT_FAILURE, "Failed to symlink %s to %s", link_path, exe_path);
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}
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char *terminal_cmd;
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sasprintf(&terminal_cmd, "i3-sensible-terminal -e %s", link_path);
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printf("argv0 = %s\n", argv0);
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printf("terminal_cmd = %s\n", terminal_cmd);
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start_application(terminal_cmd);
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free(link_path);
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free(terminal_cmd);
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free(script_path);
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free(exe_path);
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/* TODO: unset flag, re-render */
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}
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/*
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* Handles expose events (redraws of the window) and rendering in general. Will
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* be called from the code with event == NULL or from X with event != NULL.
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*
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*/
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static int handle_expose(xcb_connection_t *conn, xcb_expose_event_t *event) {
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/* re-draw the background */
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xcb_change_gc(conn, pixmap_gc, XCB_GC_FOREGROUND, (uint32_t[]){color_background});
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xcb_poly_fill_rectangle(conn, pixmap, pixmap_gc, 1, &rect);
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/* restore font color */
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set_font_colors(pixmap_gc, color_text, color_background);
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draw_text(prompt, pixmap, pixmap_gc, NULL,
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logical_px(4) + logical_px(4),
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logical_px(4) + logical_px(4),
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rect.width - logical_px(4) - logical_px(4));
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/* render close button */
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const char *close_button_label = "X";
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int line_width = logical_px(4);
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/* set width to the width of the label */
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int w = predict_text_width(i3string_from_utf8(close_button_label));
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/* account for left/right padding, which seems to be set to 8px (total) below */
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w += logical_px(8);
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int y = rect.width;
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uint32_t values[3];
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values[0] = color_button_background;
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values[1] = line_width;
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xcb_change_gc(conn, pixmap_gc, XCB_GC_FOREGROUND | XCB_GC_LINE_WIDTH, values);
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xcb_rectangle_t close = {y - w - (2 * line_width), 0, w + (2 * line_width), rect.height};
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xcb_poly_fill_rectangle(conn, pixmap, pixmap_gc, 1, &close);
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xcb_change_gc(conn, pixmap_gc, XCB_GC_FOREGROUND, (uint32_t[]){color_border});
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xcb_point_t points[] = {
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{y - w - (2 * line_width), line_width / 2},
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{y - (line_width / 2), line_width / 2},
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{y - (line_width / 2), (rect.height - (line_width / 2)) - logical_px(2)},
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{y - w - (2 * line_width), (rect.height - (line_width / 2)) - logical_px(2)},
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{y - w - (2 * line_width), line_width / 2}};
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xcb_poly_line(conn, XCB_COORD_MODE_ORIGIN, pixmap, pixmap_gc, 5, points);
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values[0] = 1;
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set_font_colors(pixmap_gc, color_text, color_button_background);
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/* the x term here seems to set left/right padding */
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draw_text_ascii(close_button_label, pixmap, pixmap_gc,
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y - w - line_width + w / 2 - logical_px(4),
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logical_px(4) + logical_px(3),
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rect.width - y + w + line_width - w / 2 + logical_px(4));
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y -= w;
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y -= logical_px(20);
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/* render custom buttons */
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line_width = 1;
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for (int c = 0; c < buttoncnt; c++) {
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/* set w to the width of the label */
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w = predict_text_width(buttons[c].label);
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/* account for left/right padding, which seems to be set to 12px (total) below */
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w += logical_px(12);
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y -= logical_px(30);
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xcb_change_gc(conn, pixmap_gc, XCB_GC_FOREGROUND, (uint32_t[]){color_button_background});
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close = (xcb_rectangle_t){y - w - (2 * line_width), logical_px(2), w + (2 * line_width), rect.height - logical_px(6)};
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xcb_poly_fill_rectangle(conn, pixmap, pixmap_gc, 1, &close);
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xcb_change_gc(conn, pixmap_gc, XCB_GC_FOREGROUND, (uint32_t[]){color_border});
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buttons[c].x = y - w - (2 * line_width);
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buttons[c].width = w;
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xcb_point_t points2[] = {
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{y - w - (2 * line_width), (line_width / 2) + logical_px(2)},
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{y - (line_width / 2), (line_width / 2) + logical_px(2)},
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{y - (line_width / 2), (rect.height - logical_px(4) - (line_width / 2))},
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{y - w - (2 * line_width), (rect.height - logical_px(4) - (line_width / 2))},
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{y - w - (2 * line_width), (line_width / 2) + logical_px(2)}};
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xcb_poly_line(conn, XCB_COORD_MODE_ORIGIN, pixmap, pixmap_gc, 5, points2);
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values[0] = color_text;
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values[1] = color_button_background;
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set_font_colors(pixmap_gc, color_text, color_button_background);
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/* the x term seems to set left/right padding */
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draw_text(buttons[c].label, pixmap, pixmap_gc, NULL,
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y - w - line_width + logical_px(6),
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logical_px(4) + logical_px(3),
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rect.width - y + w + line_width - logical_px(6));
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y -= w;
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}
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/* border line at the bottom */
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line_width = logical_px(2);
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values[0] = color_border_bottom;
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values[1] = line_width;
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xcb_change_gc(conn, pixmap_gc, XCB_GC_FOREGROUND | XCB_GC_LINE_WIDTH, values);
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xcb_point_t bottom[] = {
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{0, rect.height - 0},
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{rect.width, rect.height - 0}};
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xcb_poly_line(conn, XCB_COORD_MODE_ORIGIN, pixmap, pixmap_gc, 2, bottom);
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/* Copy the contents of the pixmap to the real window */
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xcb_copy_area(conn, pixmap, win, pixmap_gc, 0, 0, 0, 0, rect.width, rect.height);
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xcb_flush(conn);
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return 1;
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}
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/**
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* Return the position and size the i3-nagbar window should use.
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* This will be the primary output or a fallback if it cannot be determined.
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*/
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static xcb_rectangle_t get_window_position(void) {
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/* Default values if we cannot determine the primary output or its CRTC info. */
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xcb_rectangle_t result = (xcb_rectangle_t){50, 50, 500, font.height + logical_px(8) + logical_px(8)};
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xcb_randr_get_screen_resources_current_cookie_t rcookie = xcb_randr_get_screen_resources_current(conn, root);
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xcb_randr_get_output_primary_cookie_t pcookie = xcb_randr_get_output_primary(conn, root);
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xcb_randr_get_output_primary_reply_t *primary = NULL;
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xcb_randr_get_screen_resources_current_reply_t *res = NULL;
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if ((primary = xcb_randr_get_output_primary_reply(conn, pcookie, NULL)) == NULL) {
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DLOG("Could not determine the primary output.\n");
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goto free_resources;
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}
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if ((res = xcb_randr_get_screen_resources_current_reply(conn, rcookie, NULL)) == NULL) {
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goto free_resources;
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}
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xcb_randr_get_output_info_reply_t *output =
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xcb_randr_get_output_info_reply(conn,
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xcb_randr_get_output_info(conn, primary->output, res->config_timestamp),
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NULL);
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if (output == NULL || output->crtc == XCB_NONE)
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goto free_resources;
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xcb_randr_get_crtc_info_reply_t *crtc =
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xcb_randr_get_crtc_info_reply(conn,
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xcb_randr_get_crtc_info(conn, output->crtc, res->config_timestamp),
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NULL);
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if (crtc == NULL)
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goto free_resources;
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DLOG("Found primary output on position x = %i / y = %i / w = %i / h = %i.\n",
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crtc->x, crtc->y, crtc->width, crtc->height);
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if (crtc->width == 0 || crtc->height == 0) {
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DLOG("Primary output is not active, ignoring it.\n");
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goto free_resources;
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}
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result.x = crtc->x;
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result.y = crtc->y;
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goto free_resources;
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free_resources:
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FREE(res);
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FREE(primary);
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return result;
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}
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int main(int argc, char *argv[]) {
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/* The following lines are a terribly horrible kludge. Because terminal
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* emulators have different ways of interpreting the -e command line
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* argument (some need -e "less /etc/fstab", others need -e less
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* /etc/fstab), we need to write commands to a script and then just run
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* that script. However, since on some machines, $XDG_RUNTIME_DIR and
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* $TMPDIR are mounted with noexec, we cannot directly execute the script
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* either.
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*
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* Initially, we tried to pass the command via the environment variable
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* _I3_NAGBAR_CMD. But turns out that some terminal emulators such as
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* xfce4-terminal run all windows from a single master process and only
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* pass on the command (not the environment) to that master process.
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*
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* Therefore, we symlink i3-nagbar (which MUST reside on an executable
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* filesystem) with a special name and run that symlink. When i3-nagbar
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* recognizes it’s started as a binary ending in .nagbar_cmd, it strips off
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* the .nagbar_cmd suffix and runs /bin/sh on argv[0]. That way, we can run
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* a shell script on a noexec filesystem.
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*
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* From a security point of view, i3-nagbar is just an alias to /bin/sh in
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* certain circumstances. This should not open any new security issues, I
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* hope. */
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char *cmd = NULL;
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const size_t argv0_len = strlen(argv[0]);
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if (argv0_len > strlen(".nagbar_cmd") &&
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strcmp(argv[0] + argv0_len - strlen(".nagbar_cmd"), ".nagbar_cmd") == 0) {
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unlink(argv[0]);
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cmd = sstrdup(argv[0]);
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*(cmd + argv0_len - strlen(".nagbar_cmd")) = '\0';
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execl("/bin/sh", "/bin/sh", cmd, NULL);
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err(EXIT_FAILURE, "execv(/bin/sh, /bin/sh, %s)", cmd);
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}
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argv0 = argv[0];
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char *pattern = sstrdup("pango:monospace 8");
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int o, option_index = 0;
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enum { TYPE_ERROR = 0,
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TYPE_WARNING = 1 } bar_type = TYPE_ERROR;
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static struct option long_options[] = {
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{"version", no_argument, 0, 'v'},
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{"font", required_argument, 0, 'f'},
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{"button", required_argument, 0, 'b'},
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{"help", no_argument, 0, 'h'},
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{"message", required_argument, 0, 'm'},
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{"type", required_argument, 0, 't'},
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{0, 0, 0, 0}};
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char *options_string = "b:f:m:t:vh";
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prompt = i3string_from_utf8("Please do not run this program.");
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while ((o = getopt_long(argc, argv, options_string, long_options, &option_index)) != -1) {
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switch (o) {
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case 'v':
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printf("i3-nagbar " I3_VERSION "\n");
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return 0;
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case 'f':
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FREE(pattern);
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pattern = sstrdup(optarg);
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break;
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case 'm':
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i3string_free(prompt);
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prompt = i3string_from_utf8(optarg);
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break;
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case 't':
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bar_type = (strcasecmp(optarg, "warning") == 0 ? TYPE_WARNING : TYPE_ERROR);
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break;
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case 'h':
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printf("i3-nagbar " I3_VERSION "\n");
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printf("i3-nagbar [-m <message>] [-b <button> <action>] [-t warning|error] [-f <font>] [-v]\n");
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return 0;
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case 'b':
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buttons = srealloc(buttons, sizeof(button_t) * (buttoncnt + 1));
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buttons[buttoncnt].label = i3string_from_utf8(optarg);
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buttons[buttoncnt].action = argv[optind];
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printf("button with label *%s* and action *%s*\n",
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i3string_as_utf8(buttons[buttoncnt].label),
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buttons[buttoncnt].action);
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buttoncnt++;
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printf("now %d buttons\n", buttoncnt);
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if (optind < argc)
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optind++;
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break;
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}
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}
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int screens;
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if ((conn = xcb_connect(NULL, &screens)) == NULL ||
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xcb_connection_has_error(conn))
|
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die("Cannot open display\n");
|
||
|
||
/* Place requests for the atoms we need as soon as possible */
|
||
#define xmacro(atom) \
|
||
xcb_intern_atom_cookie_t atom##_cookie = xcb_intern_atom(conn, 0, strlen(#atom), #atom);
|
||
#include "atoms.xmacro"
|
||
#undef xmacro
|
||
|
||
root_screen = xcb_aux_get_screen(conn, screens);
|
||
root = root_screen->root;
|
||
|
||
if (bar_type == TYPE_ERROR) {
|
||
/* Red theme for error messages */
|
||
color_button_background = get_colorpixel("#680a0a");
|
||
color_background = get_colorpixel("#900000");
|
||
color_text = get_colorpixel("#ffffff");
|
||
color_border = get_colorpixel("#d92424");
|
||
color_border_bottom = get_colorpixel("#470909");
|
||
} else {
|
||
/* Yellowish theme for warnings */
|
||
color_button_background = get_colorpixel("#ffc100");
|
||
color_background = get_colorpixel("#ffa8000");
|
||
color_text = get_colorpixel("#000000");
|
||
color_border = get_colorpixel("#ab7100");
|
||
color_border_bottom = get_colorpixel("#ab7100");
|
||
}
|
||
|
||
font = load_font(pattern, true);
|
||
set_font(&font);
|
||
|
||
xcb_rectangle_t win_pos = get_window_position();
|
||
|
||
/* Open an input window */
|
||
win = xcb_generate_id(conn);
|
||
|
||
xcb_create_window(
|
||
conn,
|
||
XCB_COPY_FROM_PARENT,
|
||
win, /* the window id */
|
||
root, /* parent == root */
|
||
win_pos.x, win_pos.y, win_pos.width, win_pos.height, /* dimensions */
|
||
0, /* x11 border = 0, we draw our own */
|
||
XCB_WINDOW_CLASS_INPUT_OUTPUT,
|
||
XCB_WINDOW_CLASS_COPY_FROM_PARENT, /* copy visual from parent */
|
||
XCB_CW_BACK_PIXEL | XCB_CW_EVENT_MASK,
|
||
(uint32_t[]){
|
||
0, /* back pixel: black */
|
||
XCB_EVENT_MASK_EXPOSURE |
|
||
XCB_EVENT_MASK_STRUCTURE_NOTIFY |
|
||
XCB_EVENT_MASK_BUTTON_PRESS |
|
||
XCB_EVENT_MASK_BUTTON_RELEASE});
|
||
|
||
/* Map the window (make it visible) */
|
||
xcb_map_window(conn, win);
|
||
|
||
/* Setup NetWM atoms */
|
||
#define xmacro(name) \
|
||
do { \
|
||
xcb_intern_atom_reply_t *reply = xcb_intern_atom_reply(conn, name##_cookie, NULL); \
|
||
if (!reply) \
|
||
die("Could not get atom " #name "\n"); \
|
||
\
|
||
A_##name = reply->atom; \
|
||
free(reply); \
|
||
} while (0);
|
||
#include "atoms.xmacro"
|
||
#undef xmacro
|
||
|
||
/* Set dock mode */
|
||
xcb_change_property(conn,
|
||
XCB_PROP_MODE_REPLACE,
|
||
win,
|
||
A__NET_WM_WINDOW_TYPE,
|
||
A_ATOM,
|
||
32,
|
||
1,
|
||
(unsigned char *)&A__NET_WM_WINDOW_TYPE_DOCK);
|
||
|
||
/* Reserve some space at the top of the screen */
|
||
struct {
|
||
uint32_t left;
|
||
uint32_t right;
|
||
uint32_t top;
|
||
uint32_t bottom;
|
||
uint32_t left_start_y;
|
||
uint32_t left_end_y;
|
||
uint32_t right_start_y;
|
||
uint32_t right_end_y;
|
||
uint32_t top_start_x;
|
||
uint32_t top_end_x;
|
||
uint32_t bottom_start_x;
|
||
uint32_t bottom_end_x;
|
||
} __attribute__((__packed__)) strut_partial;
|
||
memset(&strut_partial, 0, sizeof(strut_partial));
|
||
|
||
strut_partial.top = font.height + logical_px(6);
|
||
strut_partial.top_start_x = 0;
|
||
strut_partial.top_end_x = 800;
|
||
|
||
xcb_change_property(conn,
|
||
XCB_PROP_MODE_REPLACE,
|
||
win,
|
||
A__NET_WM_STRUT_PARTIAL,
|
||
A_CARDINAL,
|
||
32,
|
||
12,
|
||
&strut_partial);
|
||
|
||
/* Create pixmap */
|
||
pixmap = xcb_generate_id(conn);
|
||
pixmap_gc = xcb_generate_id(conn);
|
||
xcb_create_pixmap(conn, root_screen->root_depth, pixmap, win, 500, font.height + logical_px(8));
|
||
xcb_create_gc(conn, pixmap_gc, pixmap, 0, 0);
|
||
|
||
/* Grab the keyboard to get all input */
|
||
xcb_flush(conn);
|
||
|
||
xcb_generic_event_t *event;
|
||
while ((event = xcb_wait_for_event(conn)) != NULL) {
|
||
if (event->response_type == 0) {
|
||
fprintf(stderr, "X11 Error received! sequence %x\n", event->sequence);
|
||
continue;
|
||
}
|
||
|
||
/* Strip off the highest bit (set if the event is generated) */
|
||
int type = (event->response_type & 0x7F);
|
||
|
||
switch (type) {
|
||
case XCB_EXPOSE:
|
||
handle_expose(conn, (xcb_expose_event_t *)event);
|
||
break;
|
||
|
||
case XCB_BUTTON_PRESS:
|
||
handle_button_press(conn, (xcb_button_press_event_t *)event);
|
||
break;
|
||
|
||
case XCB_BUTTON_RELEASE:
|
||
handle_button_release(conn, (xcb_button_release_event_t *)event);
|
||
break;
|
||
|
||
case XCB_CONFIGURE_NOTIFY: {
|
||
xcb_configure_notify_event_t *configure_notify = (xcb_configure_notify_event_t *)event;
|
||
rect = (xcb_rectangle_t){
|
||
configure_notify->x,
|
||
configure_notify->y,
|
||
configure_notify->width,
|
||
configure_notify->height};
|
||
|
||
/* Recreate the pixmap / gc */
|
||
xcb_free_pixmap(conn, pixmap);
|
||
xcb_free_gc(conn, pixmap_gc);
|
||
|
||
xcb_create_pixmap(conn, root_screen->root_depth, pixmap, win, rect.width, rect.height);
|
||
xcb_create_gc(conn, pixmap_gc, pixmap, 0, 0);
|
||
break;
|
||
}
|
||
}
|
||
|
||
free(event);
|
||
}
|
||
|
||
FREE(pattern);
|
||
|
||
return 0;
|
||
}
|