443 lines
15 KiB
C
443 lines
15 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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* © 2009-2011 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 his configuration file.
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*
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*/
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#include <ev.h>
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#include <stdio.h>
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#include <sys/types.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 <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 "libi3.h"
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#include "i3-nagbar.h"
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typedef struct {
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char *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 char *prompt = "Please do not run this program.";
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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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/*
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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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/* Stores the path of the shell */
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static const char *shell = NULL;
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if (shell == NULL)
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if ((shell = getenv("SHELL")) == NULL)
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shell = "/bin/sh";
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/* This is the child */
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execl(shell, shell, "-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 - 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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start_application(button->action);
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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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uint32_t values[3];
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values[0] = color_text;
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values[1] = color_background;
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xcb_change_gc(conn, pixmap_gc, XCB_GC_FOREGROUND | XCB_GC_BACKGROUND, values);
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xcb_image_text_8(conn, strlen(prompt), pixmap, pixmap_gc, 4 + 4/* X */,
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font.height + 2 + 4 /* Y = baseline of font */, prompt);
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/* render close button */
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int line_width = 4;
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int w = 20;
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int y = rect.width;
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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)) - 2 },
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{ y - w - (2 * line_width), (rect.height - (line_width / 2)) - 2 },
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{ y - w - (2 * line_width), line_width / 2 }
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};
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xcb_poly_line(conn, XCB_COORD_MODE_ORIGIN, pixmap, pixmap_gc, 5, points);
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values[0] = color_text;
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values[1] = color_button_background;
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values[2] = 1;
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xcb_change_gc(conn, pixmap_gc, XCB_GC_FOREGROUND | XCB_GC_BACKGROUND | XCB_GC_LINE_WIDTH, values);
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xcb_image_text_8(conn, strlen("x"), pixmap, pixmap_gc, y - w - line_width + (w / 2) - 4/* X */,
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font.height + 2 + 4 - 1/* Y = baseline of font */, "X");
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y -= w;
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y -= 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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/* TODO: make w = text extents of the label */
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w = 100;
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y -= 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), 2, w + (2 * line_width), rect.height - 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) + 2 },
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{ y - (line_width / 2), (line_width / 2) + 2 },
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{ y - (line_width / 2), (rect.height - 4 - (line_width / 2)) },
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{ y - w - (2 * line_width), (rect.height - 4 - (line_width / 2)) },
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{ y - w - (2 * line_width), (line_width / 2) + 2 }
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};
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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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xcb_change_gc(conn, pixmap_gc, XCB_GC_FOREGROUND | XCB_GC_BACKGROUND, values);
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xcb_image_text_8(conn, strlen(buttons[c].label), pixmap, pixmap_gc, y - w - line_width + 6/* X */,
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font.height + 2 + 3/* Y = baseline of font */, buttons[c].label);
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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 = 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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};
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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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int main(int argc, char *argv[]) {
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char *pattern = "-misc-fixed-medium-r-normal--13-120-75-75-C-70-iso10646-1";
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int o, option_index = 0;
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enum { TYPE_ERROR = 0, 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", no_argument, 0, 'm'},
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{"type", required_argument, 0, 't'},
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{0, 0, 0, 0}
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};
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char *options_string = "b:f:m:t:vh";
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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);
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return 0;
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case 'f':
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FREE(pattern);
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pattern = strdup(optarg);
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break;
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case 'm':
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prompt = strdup(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>] [-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 = 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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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"
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#undef xmacro
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xcb_screen_t *root_screen = xcb_aux_get_screen(conn, screens);
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root = root_screen->root;
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if (bar_type == TYPE_ERROR) {
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/* Red theme for error messages */
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color_button_background = get_colorpixel("#680a0a");
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color_background = get_colorpixel("#900000");
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color_text = get_colorpixel("#ffffff");
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color_border = get_colorpixel("#d92424");
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color_border_bottom = get_colorpixel("#470909");
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} else {
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/* Yellowish theme for warnings */
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color_button_background = get_colorpixel("#ffc100");
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color_background = get_colorpixel("#ffa8000");
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color_text = get_colorpixel("#000000");
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color_border = get_colorpixel("#ab7100");
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color_border_bottom = get_colorpixel("#ab7100");
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}
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font = load_font(pattern, true);
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/* Open an input window */
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win = xcb_generate_id(conn);
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xcb_create_window(
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conn,
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XCB_COPY_FROM_PARENT,
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win, /* the window id */
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root, /* parent == root */
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50, 50, 500, font.height + 8 + 8 /* 8 px padding */, /* dimensions */
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0, /* x11 border = 0, we draw our own */
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XCB_WINDOW_CLASS_INPUT_OUTPUT,
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XCB_WINDOW_CLASS_COPY_FROM_PARENT, /* copy visual from parent */
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XCB_CW_BACK_PIXEL | XCB_CW_EVENT_MASK,
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(uint32_t[]){
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0, /* back pixel: black */
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XCB_EVENT_MASK_EXPOSURE |
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XCB_EVENT_MASK_STRUCTURE_NOTIFY |
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XCB_EVENT_MASK_BUTTON_PRESS |
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XCB_EVENT_MASK_BUTTON_RELEASE
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});
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/* Map the window (make it visible) */
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xcb_map_window(conn, win);
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/* Setup NetWM atoms */
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#define xmacro(name) \
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do { \
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xcb_intern_atom_reply_t *reply = xcb_intern_atom_reply(conn, name ## _cookie, NULL); \
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if (!reply) \
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die("Could not get atom " # name "\n"); \
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\
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A_ ## name = reply->atom; \
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free(reply); \
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} while (0);
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#include "atoms.xmacro"
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#undef xmacro
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/* Set dock mode */
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xcb_change_property(conn,
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XCB_PROP_MODE_REPLACE,
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win,
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A__NET_WM_WINDOW_TYPE,
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A_ATOM,
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32,
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1,
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(unsigned char*) &A__NET_WM_WINDOW_TYPE_DOCK);
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/* Reserve some space at the top of the screen */
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struct {
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uint32_t left;
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uint32_t right;
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uint32_t top;
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uint32_t bottom;
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uint32_t left_start_y;
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uint32_t left_end_y;
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uint32_t right_start_y;
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uint32_t right_end_y;
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uint32_t top_start_x;
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uint32_t top_end_x;
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uint32_t bottom_start_x;
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uint32_t bottom_end_x;
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} __attribute__((__packed__)) strut_partial = {0,};
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strut_partial.top = font.height + 6;
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strut_partial.top_start_x = 0;
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strut_partial.top_end_x = 800;
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xcb_change_property(conn,
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XCB_PROP_MODE_REPLACE,
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win,
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A__NET_WM_STRUT_PARTIAL,
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A_CARDINAL,
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32,
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12,
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&strut_partial);
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/* Create pixmap */
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pixmap = xcb_generate_id(conn);
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pixmap_gc = xcb_generate_id(conn);
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xcb_create_pixmap(conn, root_screen->root_depth, pixmap, win, 500, font.height + 8);
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xcb_create_gc(conn, pixmap_gc, pixmap, 0, 0);
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/* Create graphics context */
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xcb_change_gc(conn, pixmap_gc, XCB_GC_FONT, (uint32_t[]){ font.id });
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/* Grab the keyboard to get all input */
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xcb_flush(conn);
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xcb_generic_event_t *event;
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while ((event = xcb_wait_for_event(conn)) != NULL) {
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if (event->response_type == 0) {
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fprintf(stderr, "X11 Error received! sequence %x\n", event->sequence);
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continue;
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}
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/* Strip off the highest bit (set if the event is generated) */
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int type = (event->response_type & 0x7F);
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switch (type) {
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case XCB_EXPOSE:
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handle_expose(conn, (xcb_expose_event_t*)event);
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break;
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case XCB_BUTTON_PRESS:
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handle_button_press(conn, (xcb_button_press_event_t*)event);
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break;
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case XCB_BUTTON_RELEASE:
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handle_button_release(conn, (xcb_button_release_event_t*)event);
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break;
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case XCB_CONFIGURE_NOTIFY: {
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xcb_configure_notify_event_t *configure_notify = (xcb_configure_notify_event_t*)event;
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rect = (xcb_rectangle_t){
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configure_notify->x,
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configure_notify->y,
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configure_notify->width,
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configure_notify->height
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};
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/* Recreate the pixmap / gc */
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xcb_free_pixmap(conn, pixmap);
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xcb_free_gc(conn, pixmap_gc);
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xcb_create_pixmap(conn, root_screen->root_depth, pixmap, win, rect.width, rect.height);
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xcb_create_gc(conn, pixmap_gc, pixmap, 0, 0);
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/* Create graphics context */
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xcb_change_gc(conn, pixmap_gc, XCB_GC_FONT, (uint32_t[]){ font.id });
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break;
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}
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}
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free(event);
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}
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return 0;
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}
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