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,
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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,
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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",
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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 = strdup(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 = realloc(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");
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/* Place requests for the atoms we need as soon as possible */
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#define xmacro(atom) \
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xcb_intern_atom_cookie_t atom##_cookie = xcb_intern_atom(conn, 0, strlen(#atom), #atom);
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#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;
|
||
}
|