gri3-wm/i3-input/xcb.c

166 lines
5.0 KiB
C

/*
* vim:ts=8:expandtab
*
* i3 - an improved dynamic tiling window manager
*
* © 2009 Michael Stapelberg and contributors
*
* See file LICENSE for license information.
*
*/
#include <stdint.h>
#include <stdlib.h>
#include <string.h>
#include <stdio.h>
#include <xcb/xcb.h>
#include <xcb/xcb_keysyms.h>
#include <X11/keysym.h>
#include "i3-input.h"
/*
* Convenience-wrapper around xcb_change_gc which saves us declaring a variable
*
*/
void xcb_change_gc_single(xcb_connection_t *conn, xcb_gcontext_t gc, uint32_t mask, uint32_t value) {
xcb_change_gc(conn, gc, mask, &value);
}
/*
* Returns the colorpixel to use for the given hex color (think of HTML).
*
* The hex_color has to start with #, for example #FF00FF.
*
* NOTE that get_colorpixel() does _NOT_ check the given color code for validity.
* This has to be done by the caller.
*
*/
uint32_t get_colorpixel(xcb_connection_t *conn, char *hex) {
char strgroups[3][3] = {{hex[1], hex[2], '\0'},
{hex[3], hex[4], '\0'},
{hex[5], hex[6], '\0'}};
uint32_t rgb16[3] = {(strtol(strgroups[0], NULL, 16)),
(strtol(strgroups[1], NULL, 16)),
(strtol(strgroups[2], NULL, 16))};
return (rgb16[0] << 16) + (rgb16[1] << 8) + rgb16[2];
}
/*
* Returns the mask for Mode_switch (to be used for looking up keysymbols by
* keycode).
*
*/
uint32_t get_mod_mask(xcb_connection_t *conn, uint32_t keycode) {
xcb_key_symbols_t *symbols = xcb_key_symbols_alloc(conn);
xcb_get_modifier_mapping_reply_t *modmap_r;
xcb_keycode_t *modmap, kc;
xcb_keycode_t *modeswitchcodes = xcb_key_symbols_get_keycode(symbols, keycode);
if (modeswitchcodes == NULL)
return 0;
modmap_r = xcb_get_modifier_mapping_reply(conn, xcb_get_modifier_mapping(conn), NULL);
modmap = xcb_get_modifier_mapping_keycodes(modmap_r);
for (int i = 0; i < 8; i++)
for (int j = 0; j < modmap_r->keycodes_per_modifier; j++) {
kc = modmap[i * modmap_r->keycodes_per_modifier + j];
for (xcb_keycode_t *ktest = modeswitchcodes; *ktest; ktest++) {
if (*ktest != kc)
continue;
free(modeswitchcodes);
free(modmap_r);
return (1 << i);
}
}
return 0;
}
/*
* Opens the window we use for input/output and maps it
*
*/
xcb_window_t open_input_window(xcb_connection_t *conn, uint32_t width, uint32_t height) {
xcb_window_t win = xcb_generate_id(conn);
//xcb_cursor_t cursor_id = xcb_generate_id(conn);
#if 0
/* Use the default cursor (left pointer) */
if (cursor > -1) {
i3Font *cursor_font = load_font(conn, "cursor");
xcb_create_glyph_cursor(conn, cursor_id, cursor_font->id, cursor_font->id,
XCB_CURSOR_LEFT_PTR, XCB_CURSOR_LEFT_PTR + 1,
0, 0, 0, 65535, 65535, 65535);
}
#endif
uint32_t mask = 0;
uint32_t values[3];
mask |= XCB_CW_BACK_PIXEL;
values[0] = 0;
mask |= XCB_CW_OVERRIDE_REDIRECT;
values[1] = 1;
mask |= XCB_CW_EVENT_MASK;
values[2] = XCB_EVENT_MASK_EXPOSURE;
xcb_create_window(conn,
XCB_COPY_FROM_PARENT,
win, /* the window id */
root, /* parent == root */
50, 50, width, height, /* dimensions */
0, /* border = 0, we draw our own */
XCB_WINDOW_CLASS_INPUT_OUTPUT,
XCB_WINDOW_CLASS_COPY_FROM_PARENT, /* copy visual from parent */
mask,
values);
#if 0
if (cursor > -1)
xcb_change_window_attributes(conn, result, XCB_CW_CURSOR, &cursor_id);
#endif
/* Map the window (= make it visible) */
xcb_map_window(conn, win);
return win;
}
/*
* Returns the ID of the font matching the given pattern and stores the height
* of the font (in pixels) in *font_height. die()s if no font matches.
*
*/
int get_font_id(xcb_connection_t *conn, char *pattern, int *font_height) {
xcb_void_cookie_t font_cookie;
xcb_list_fonts_with_info_cookie_t info_cookie;
/* Send all our requests first */
int result;
result = xcb_generate_id(conn);
font_cookie = xcb_open_font_checked(conn, result, strlen(pattern), pattern);
info_cookie = xcb_list_fonts_with_info(conn, 1, strlen(pattern), pattern);
xcb_generic_error_t *error = xcb_request_check(conn, font_cookie);
if (error != NULL) {
fprintf(stderr, "ERROR: Could not open font: %d\n", error->error_code);
exit(1);
}
/* Get information (height/name) for this font */
xcb_list_fonts_with_info_reply_t *reply = xcb_list_fonts_with_info_reply(conn, info_cookie, NULL);
if (reply == NULL)
die("Could not load font \"%s\"\n", pattern);
*font_height = reply->font_ascent + reply->font_descent;
return result;
}