/*
- * vim:ts=8:expandtab
+ * vim:ts=4:sw=4:expandtab
*
* i3 - an improved dynamic tiling window manager
*
- * (c) 2009 Michael Stapelberg and contributors
+ * © 2009-2010 Michael Stapelberg and contributors
*
* See file LICENSE for license information.
*
+ * xcb.c: Helper functions for easier usage of XCB
+ *
+ */
+
+#include "all.h"
+
+TAILQ_HEAD(cached_fonts_head, Font) cached_fonts = TAILQ_HEAD_INITIALIZER(cached_fonts);
+unsigned int xcb_numlock_mask;
+
+/*
+ * Loads a font for usage, also getting its height. If fallback is true,
+ * i3 loads 'fixed' or '-misc-*' if the font cannot be found instead of
+ * exiting.
+ *
*/
-#include <stdint.h>
-#include <stdio.h>
-#include <stdlib.h>
+i3Font load_font(const char *pattern, bool fallback) {
+ i3Font new;
+ xcb_void_cookie_t font_cookie;
+ xcb_list_fonts_with_info_cookie_t info_cookie;
+
+ /* Send all our requests first */
+ new.id = xcb_generate_id(conn);
+ font_cookie = xcb_open_font_checked(conn, new.id, strlen(pattern), pattern);
+ info_cookie = xcb_list_fonts_with_info(conn, 1, strlen(pattern), pattern);
+
+ /* Check for errors. If errors, fall back to default font. */
+ xcb_generic_error_t *error = xcb_request_check(conn, font_cookie);
+
+ /* If we fail to open font, fall back to 'fixed'. If opening 'fixed' fails fall back to '-misc-*' */
+ if (error != NULL) {
+ ELOG("Could not open font %s (X error %d). Reverting to backup font.\n", pattern, error->error_code);
+ pattern = "fixed";
+ font_cookie = xcb_open_font_checked(conn, new.id, strlen(pattern), pattern);
+ info_cookie = xcb_list_fonts_with_info(conn, 1, strlen(pattern), pattern);
+
+ /* Check if we managed to open 'fixed' */
+ xcb_generic_error_t *error = xcb_request_check(conn, font_cookie);
+
+ /* Fall back to '-misc-*' if opening 'fixed' fails. */
+ if (error != NULL) {
+ ELOG("Could not open fallback font '%s', trying with '-misc-*'\n",pattern);
+ pattern = "-misc-*";
+ font_cookie = xcb_open_font_checked(conn, new.id, strlen(pattern), pattern);
+ info_cookie = xcb_list_fonts_with_info(conn, 1, strlen(pattern), pattern);
+
+ check_error(conn, font_cookie, "Could open neither requested font nor fallback (fixed or -misc-*");
+ }
+ }
+
+ /* 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);
+ exit_if_null(reply, "Could not load font \"%s\"\n", pattern);
-#include <xcb/xcb.h>
-/* All the helper functions needed for efficiently using XCB */
-#include "util.h"
+ new.height = reply->font_ascent + reply->font_descent;
+
+ return new;
+}
/*
* Returns the colorpixel to use for the given hex color (think of HTML).
* This has to be done by the caller.
*
*/
-uint32_t get_colorpixel(xcb_connection_t *conn, xcb_window_t window, char *hex) {
- /* TODO: We need to store the colorpixels per child to remove these unnecessary requests every time */
- #define RGB_8_TO_16(i) (65535 * ((i) & 0xFF) / 255)
- char strgroups[3][3] = {{hex[1], hex[2], '\0'},
- {hex[3], hex[4], '\0'},
- {hex[5], hex[6], '\0'}};
- int rgb16[3] = {RGB_8_TO_16(strtol(strgroups[0], NULL, 16)),
- RGB_8_TO_16(strtol(strgroups[1], NULL, 16)),
- RGB_8_TO_16(strtol(strgroups[2], NULL, 16))};
-
- xcb_screen_t *root_screen = xcb_setup_roots_iterator(xcb_get_setup(conn)).data;
-
- xcb_colormap_t colormap_id = xcb_generate_id(conn);
- xcb_void_cookie_t cookie = xcb_create_colormap_checked(conn, XCB_COLORMAP_ALLOC_NONE,
- colormap_id, window, root_screen->root_visual);
- check_error(conn, cookie, "Could not create colormap");
- xcb_alloc_color_reply_t *reply = xcb_alloc_color_reply(conn,
- xcb_alloc_color(conn, colormap_id, rgb16[0], rgb16[1], rgb16[2]), NULL);
-
- if (!reply) {
- printf("Could not allocate color\n");
- exit(1);
- }
+uint32_t get_colorpixel(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];
+}
+
+/*
+ * Convenience wrapper around xcb_create_window which takes care of depth, generating an ID and checking
+ * for errors.
+ *
+ */
+xcb_window_t create_window(xcb_connection_t *conn, Rect dims, uint16_t window_class,
+ enum xcursor_cursor_t cursor, bool map, uint32_t mask, uint32_t *values) {
+ xcb_window_t result = xcb_generate_id(conn);
+ xcb_cursor_t cursor_id = xcb_generate_id(conn);
+
+ /* If the window class is XCB_WINDOW_CLASS_INPUT_ONLY, depth has to be 0 */
+ uint16_t depth = (window_class == XCB_WINDOW_CLASS_INPUT_ONLY ? 0 : XCB_COPY_FROM_PARENT);
+
+ xcb_create_window(conn,
+ depth,
+ result, /* the window id */
+ root, /* parent == root */
+ dims.x, dims.y, dims.width, dims.height, /* dimensions */
+ 0, /* border = 0, we draw our own */
+ window_class,
+ XCB_WINDOW_CLASS_COPY_FROM_PARENT, /* copy visual from parent */
+ mask,
+ values);
+
+ /* Set the cursor */
+ if (xcursor_supported) {
+ mask = XCB_CW_CURSOR;
+ values[0] = xcursor_get_cursor(cursor);
+ xcb_change_window_attributes(conn, result, mask, values);
+ } else {
+ i3Font cursor_font = load_font("cursor", false);
+ int xcb_cursor = xcursor_get_xcb_cursor(cursor);
+ xcb_create_glyph_cursor(conn, cursor_id, cursor_font.id, cursor_font.id,
+ xcb_cursor, xcb_cursor + 1, 0, 0, 0, 65535, 65535, 65535);
+ xcb_change_window_attributes(conn, result, XCB_CW_CURSOR, &cursor_id);
+ xcb_free_cursor(conn, cursor_id);
+ }
+
+ /* Map the window (= make it visible) */
+ if (map)
+ xcb_map_window(conn, result);
+
+ return result;
+}
+
+/*
+ * Changes a single value in the graphic context (so one doesn’t have to define an array of values)
+ *
+ */
+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);
+}
+
+/*
+ * Draws a line from x,y to to_x,to_y using the given color
+ *
+ */
+void xcb_draw_line(xcb_connection_t *conn, xcb_drawable_t drawable, xcb_gcontext_t gc,
+ uint32_t colorpixel, uint32_t x, uint32_t y, uint32_t to_x, uint32_t to_y) {
+ xcb_change_gc_single(conn, gc, XCB_GC_FOREGROUND, colorpixel);
+ xcb_point_t points[] = {{x, y}, {to_x, to_y}};
+ xcb_poly_line(conn, XCB_COORD_MODE_ORIGIN, drawable, gc, 2, points);
+}
+
+/*
+ * Draws a rectangle from x,y with width,height using the given color
+ *
+ */
+void xcb_draw_rect(xcb_connection_t *conn, xcb_drawable_t drawable, xcb_gcontext_t gc,
+ uint32_t colorpixel, uint32_t x, uint32_t y, uint32_t width, uint32_t height) {
+ xcb_change_gc_single(conn, gc, XCB_GC_FOREGROUND, colorpixel);
+ xcb_rectangle_t rect = {x, y, width, height};
+ xcb_poly_fill_rectangle(conn, drawable, gc, 1, &rect);
+}
+
+/*
+ * Generates a configure_notify event and sends it to the given window
+ * Applications need this to think they’ve configured themselves correctly.
+ * The truth is, however, that we will manage them.
+ *
+ */
+void fake_configure_notify(xcb_connection_t *conn, Rect r, xcb_window_t window) {
+ xcb_configure_notify_event_t generated_event;
+
+ generated_event.event = window;
+ generated_event.window = window;
+ generated_event.response_type = XCB_CONFIGURE_NOTIFY;
+
+ generated_event.x = r.x;
+ generated_event.y = r.y;
+ generated_event.width = r.width;
+ generated_event.height = r.height;
+
+ generated_event.border_width = 0;
+ generated_event.above_sibling = XCB_NONE;
+ generated_event.override_redirect = false;
+
+ xcb_send_event(conn, false, window, XCB_EVENT_MASK_STRUCTURE_NOTIFY, (char*)&generated_event);
+ xcb_flush(conn);
+}
+
+/*
+ * Generates a configure_notify_event with absolute coordinates (relative to the X root
+ * window, not to the client’s frame) for the given client.
+ *
+ */
+void fake_absolute_configure_notify(Con *con) {
+ Rect absolute;
+ if (con->window == NULL)
+ return;
+
+ absolute.x = con->rect.x + con->window_rect.x;
+ absolute.y = con->rect.y + con->window_rect.y;
+ absolute.width = con->window_rect.width;
+ absolute.height = con->window_rect.height;
+
+ DLOG("fake rect = (%d, %d, %d, %d)\n", absolute.x, absolute.y, absolute.width, absolute.height);
+
+ fake_configure_notify(conn, absolute, con->window->id);
+}
+
+/*
+ * Sends the WM_TAKE_FOCUS ClientMessage to the given window
+ *
+ */
+void send_take_focus(xcb_window_t window) {
+ xcb_client_message_event_t ev;
+
+ memset(&ev, 0, sizeof(xcb_client_message_event_t));
+
+ ev.response_type = XCB_CLIENT_MESSAGE;
+ ev.window = window;
+ ev.type = A_WM_PROTOCOLS;
+ ev.format = 32;
+ ev.data.data32[0] = A_WM_TAKE_FOCUS;
+ ev.data.data32[1] = XCB_CURRENT_TIME;
+
+ DLOG("Sending WM_TAKE_FOCUS to the client\n");
+ xcb_send_event(conn, false, window, XCB_EVENT_MASK_NO_EVENT, (char*)&ev);
+}
+
+/*
+ * Finds out which modifier mask is the one for numlock, as the user may change this.
+ *
+ */
+void xcb_get_numlock_mask(xcb_connection_t *conn) {
+ xcb_key_symbols_t *keysyms;
+ xcb_get_modifier_mapping_cookie_t cookie;
+ xcb_get_modifier_mapping_reply_t *reply;
+ xcb_keycode_t *modmap;
+ int mask, i;
+ const int masks[8] = { XCB_MOD_MASK_SHIFT,
+ XCB_MOD_MASK_LOCK,
+ XCB_MOD_MASK_CONTROL,
+ XCB_MOD_MASK_1,
+ XCB_MOD_MASK_2,
+ XCB_MOD_MASK_3,
+ XCB_MOD_MASK_4,
+ XCB_MOD_MASK_5 };
+
+ /* Request the modifier map */
+ cookie = xcb_get_modifier_mapping_unchecked(conn);
+
+ /* Get the keysymbols */
+ keysyms = xcb_key_symbols_alloc(conn);
+
+ if ((reply = xcb_get_modifier_mapping_reply(conn, cookie, NULL)) == NULL) {
+ xcb_key_symbols_free(keysyms);
+ return;
+ }
+
+ modmap = xcb_get_modifier_mapping_keycodes(reply);
+
+ /* Get the keycode for numlock */
+#ifdef OLD_XCB_KEYSYMS_API
+ xcb_keycode_t numlock = xcb_key_symbols_get_keycode(keysyms, XCB_NUM_LOCK);
+#else
+ /* For now, we only use the first keysymbol. */
+ xcb_keycode_t *numlock_syms = xcb_key_symbols_get_keycode(keysyms, XCB_NUM_LOCK);
+ if (numlock_syms == NULL)
+ return;
+ xcb_keycode_t numlock = *numlock_syms;
+ free(numlock_syms);
+#endif
+
+ /* Check all modifiers (Mod1-Mod5, Shift, Control, Lock) */
+ for (mask = 0; mask < 8; mask++)
+ for (i = 0; i < reply->keycodes_per_modifier; i++)
+ if (modmap[(mask * reply->keycodes_per_modifier) + i] == numlock)
+ xcb_numlock_mask = masks[mask];
+
+ xcb_key_symbols_free(keysyms);
+ free(reply);
+}
+
+/*
+ * Raises the given window (typically client->frame) above all other windows
+ *
+ */
+void xcb_raise_window(xcb_connection_t *conn, xcb_window_t window) {
+ uint32_t values[] = { XCB_STACK_MODE_ABOVE };
+ xcb_configure_window(conn, window, XCB_CONFIG_WINDOW_STACK_MODE, values);
+}
+
+/*
+ *
+ * Prepares the given Cached_Pixmap for usage (checks whether the size of the
+ * object this pixmap is related to (e.g. a window) has changed and re-creates
+ * the pixmap if so).
+ *
+ */
+void cached_pixmap_prepare(xcb_connection_t *conn, struct Cached_Pixmap *pixmap) {
+ DLOG("preparing pixmap\n");
+
+ /* If the Rect did not change, the pixmap does not need to be recreated */
+ if (memcmp(&(pixmap->rect), pixmap->referred_rect, sizeof(Rect)) == 0)
+ return;
+
+ memcpy(&(pixmap->rect), pixmap->referred_rect, sizeof(Rect));
+
+ if (pixmap->id == 0 || pixmap->gc == 0) {
+ DLOG("Creating new pixmap...\n");
+ pixmap->id = xcb_generate_id(conn);
+ pixmap->gc = xcb_generate_id(conn);
+ } else {
+ DLOG("Re-creating this pixmap...\n");
+ xcb_free_gc(conn, pixmap->gc);
+ xcb_free_pixmap(conn, pixmap->id);
+ }
+
+ xcb_create_pixmap(conn, root_depth, pixmap->id,
+ pixmap->referred_drawable, pixmap->rect.width, pixmap->rect.height);
+
+ xcb_create_gc(conn, pixmap->gc, pixmap->id, 0, 0);
+}
+
+/*
+ * Query the width of the given text (16-bit characters, UCS) with given real
+ * length (amount of glyphs) using the given font.
+ *
+ */
+int predict_text_width(char *text, int length) {
+ xcb_query_text_extents_cookie_t cookie;
+ xcb_query_text_extents_reply_t *reply;
+ xcb_generic_error_t *error;
+ int width;
+
+ cookie = xcb_query_text_extents(conn, config.font.id, length, (xcb_char2b_t*)text);
+ if ((reply = xcb_query_text_extents_reply(conn, cookie, &error)) == NULL) {
+ ELOG("Could not get text extents (X error code %d)\n",
+ error->error_code);
+ /* We return the rather safe guess of 7 pixels, because a
+ * rendering error is better than a crash. Plus, the user will
+ * see the error in his log. */
+ return 7;
+ }
+
+ width = reply->overall_width;
+ free(reply);
+ return width;
+}
+
+/*
+ * Configures the given window to have the size/position specified by given rect
+ *
+ */
+void xcb_set_window_rect(xcb_connection_t *conn, xcb_window_t window, Rect r) {
+ xcb_void_cookie_t cookie;
+ cookie = xcb_configure_window(conn, window,
+ XCB_CONFIG_WINDOW_X |
+ XCB_CONFIG_WINDOW_Y |
+ XCB_CONFIG_WINDOW_WIDTH |
+ XCB_CONFIG_WINDOW_HEIGHT,
+ &(r.x));
+ /* ignore events which are generated because we configured a window */
+ add_ignore_event(cookie.sequence);
+}
+
+/*
+ * Returns true if the given reply contains the given atom.
+ *
+ */
+bool xcb_reply_contains_atom(xcb_get_property_reply_t *prop, xcb_atom_t atom) {
+ if (prop == NULL || xcb_get_property_value_length(prop) == 0)
+ return false;
+
+ xcb_atom_t *atoms;
+ if ((atoms = xcb_get_property_value(prop)) == NULL)
+ return false;
+
+ for (int i = 0; i < xcb_get_property_value_length(prop) / (prop->format / 8); i++)
+ if (atoms[i] == atom)
+ return true;
+
+ return false;
- uint32_t pixel = reply->pixel;
- free(reply);
- xcb_free_colormap(conn, colormap_id);
- return pixel;
}
projects / i3 / i3 / blobdiff