+/*
+ * i3bar - an xcb-based status- and ws-bar for i3
+ *
+ * © 2010 Axel Wagner and contributors
+ *
+ * See file LICNSE for license information
+ *
+ * src/xcb.c: Communicating with X
+ *
+ */
#include <xcb/xcb.h>
+#include <xcb/xproto.h>
+#include <xcb/xcb_event.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
+#include <i3/ipc.h>
+#include <ev.h>
-#include "xcb.h"
-#include "outputs.h"
-#include "workspaces.h"
+#include "common.h"
+
+/* We save the Atoms in an easy to access array, indexed by an enum */
+#define NUM_ATOMS 3
+
+enum {
+ #define ATOM_DO(name) name,
+ #include "xcb_atoms.def"
+};
xcb_intern_atom_cookie_t atom_cookies[NUM_ATOMS];
+xcb_atom_t atoms[NUM_ATOMS];
+
+/* Variables, that are the same for all functions at all times */
+xcb_connection_t *xcb_connection;
+xcb_screen_t *xcb_screens;
+xcb_window_t xcb_root;
+xcb_font_t xcb_font;
+/* Event-Watchers, to interact with the user */
+ev_prepare *xcb_prep;
+ev_check *xcb_chk;
+ev_io *xcb_io;
+
+/*
+ * Converts a colorstring to a colorpixel as expected from xcb_change_gc.
+ * s is assumed to be in the format "rrggbb"
+ *
+ */
uint32_t get_colorpixel(const char *s) {
- char strings[3][3] = { { s[0], s[1], '\0'} ,
- { s[2], s[3], '\0'} ,
- { s[4], s[5], '\0'} };
- uint8_t r = strtol(strings[0], NULL, 16);
- uint8_t g = strtol(strings[1], NULL, 16);
- uint8_t b = strtol(strings[2], NULL, 16);
- return (r << 16 | g << 8 | b);
+ char strings[3][3] = { { s[0], s[1], '\0'} ,
+ { s[2], s[3], '\0'} ,
+ { s[4], s[5], '\0'} };
+ uint8_t r = strtol(strings[0], NULL, 16);
+ uint8_t g = strtol(strings[1], NULL, 16);
+ uint8_t b = strtol(strings[2], NULL, 16);
+ return (r << 16 | g << 8 | b);
}
-void init_xcb() {
- /* FIXME: xcb_connect leaks Memory */
- xcb_connection = xcb_connect(NULL, NULL);
- if (xcb_connection_has_error(xcb_connection)) {
- printf("Cannot open display\n");
- exit(EXIT_FAILURE);
- }
- printf("Connected to xcb\n");
+/*
+ * Handle a button-press-event (i.c. a mouse click on one of our bars).
+ * We determine, wether the click occured on a ws-button or if the scroll-
+ * wheel was used and change the workspace appropriately
+ *
+ */
+void handle_button(xcb_button_press_event_t *event) {
+ i3_ws *cur_ws;
+
+ /* Determine, which bar was clicked */
+ i3_output *walk;
+ xcb_window_t bar = event->event;
+ SLIST_FOREACH(walk, outputs, slist) {
+ if (walk->bar == bar) {
+ break;
+ }
+ }
+
+ if (walk == NULL) {
+ printf("Unknown Bar klicked!\n");
+ return;
+ }
- /* We have to request the atoms we need */
- #define ATOM_DO(name) atom_cookies[name] = xcb_intern_atom(xcb_connection, 0, strlen(#name), #name);
- #include "xcb_atoms.def"
+ /* TODO: Move this to exern get_ws_for_output() */
+ TAILQ_FOREACH(cur_ws, walk->workspaces, tailq) {
+ if (cur_ws->visible) {
+ break;
+ }
+ }
- xcb_screens = xcb_setup_roots_iterator(xcb_get_setup(xcb_connection)).data;
- xcb_root = xcb_screens->root;
+ if (cur_ws == NULL) {
+ printf("No Workspace active?\n");
+ return;
+ }
- /* FIXME: Maybe we can push that further backwards */
- get_atoms();
+ int32_t x = event->event_x;
+
+ printf("Got Button %d\n", event->detail);
+
+ switch (event->detail) {
+ case 1:
+ /* Left Mousbutton. We determine, which button was clicked
+ * and set cur_ws accordingly */
+ TAILQ_FOREACH(cur_ws, walk->workspaces, tailq) {
+ printf("x = %d\n", x);
+ if (x < cur_ws->name_width + 10) {
+ break;
+ }
+ x -= cur_ws->name_width + 10;
+ }
+ if (cur_ws == NULL) {
+ return;
+ }
+ break;
+ case 4:
+ /* Mouse wheel down. We select the next ws */
+ if (cur_ws == TAILQ_FIRST(walk->workspaces)) {
+ cur_ws = TAILQ_LAST(walk->workspaces, ws_head);
+ } else {
+ cur_ws = TAILQ_PREV(cur_ws, ws_head, tailq);
+ }
+ break;
+ case 5:
+ /* Mouse wheel up. We select the previos ws */
+ if (cur_ws == TAILQ_LAST(walk->workspaces, ws_head)) {
+ cur_ws = TAILQ_FIRST(walk->workspaces);
+ } else {
+ cur_ws = TAILQ_NEXT(cur_ws, tailq);
+ }
+ break;
+ }
+
+ char buffer[50];
+ snprintf(buffer, 50, "%d", cur_ws->num);
+ i3_send_msg(I3_IPC_MESSAGE_TYPE_COMMAND, buffer);
}
+/*
+ * This function is called immediately bevor the main loop locks. We flush xcb
+ * then (and only then)
+ *
+ */
+void xcb_prep_cb(struct ev_loop *loop, ev_prepare *watcher, int revenst) {
+ xcb_flush(xcb_connection);
+}
+
+/*
+ * This function is called immediately after the main loop locks, so when one
+ * of the watchers registered an event.
+ * We check wether an X-Event arrived and handle it.
+ *
+ */
+void xcb_chk_cb(struct ev_loop *loop, ev_check *watcher, int revents) {
+ xcb_generic_event_t *event;
+ while ((event = xcb_poll_for_event(xcb_connection)) == NULL) {
+ return;
+ }
+
+ switch (event->response_type & ~0x80) {
+ case XCB_EXPOSE:
+ /* Expose-events happen, when the window needs to be redrawn */
+ draw_bars();
+ break;
+ case XCB_BUTTON_PRESS:
+ /* Button-press-events are mouse-buttons clicked on one of our bars */
+ handle_button((xcb_button_press_event_t*) event);
+ break;
+ }
+ FREE(event);
+}
+
+/*
+ * Dummy Callback. We only need this, so that the Prepare- and Check-Watchers
+ * are triggered
+ *
+ */
+void xcb_io_cb(struct ev_loop *loop, ev_io *watcher, int revents) {
+}
+
+/*
+ * Calculate the rendered width of a string with the configured font.
+ * The string has to be encoded in ucs2 and glyph_len has to be the length
+ * of the string (in width)
+ *
+ */
+int get_string_width(xcb_char2b_t *string, int glyph_len) {
+ 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(xcb_connection, xcb_font, glyph_len, string);
+ reply = xcb_query_text_extents_reply(xcb_connection, cookie, &error);
+ if (reply == NULL) {
+ printf("ERROR: Could not get text extents!");
+ return 7;
+ }
+
+ width = reply->overall_width;
+ free(reply);
+ return width;
+}
+
+/*
+ * Initialize xcb and use the specified fontname for text-rendering
+ *
+ */
+void init_xcb(char *fontname) {
+ /* FIXME: xcb_connect leaks Memory */
+ xcb_connection = xcb_connect(NULL, NULL);
+ if (xcb_connection_has_error(xcb_connection)) {
+ printf("Cannot open display\n");
+ exit(EXIT_FAILURE);
+ }
+ printf("Connected to xcb\n");
+
+ /* We have to request the atoms we need */
+ #define ATOM_DO(name) atom_cookies[name] = xcb_intern_atom(xcb_connection, 0, strlen(#name), #name);
+ #include "xcb_atoms.def"
+
+ xcb_screens = xcb_setup_roots_iterator(xcb_get_setup(xcb_connection)).data;
+ xcb_root = xcb_screens->root;
+
+ /* We load and allocate the font */
+ xcb_font = xcb_generate_id(xcb_connection);
+ xcb_open_font(xcb_connection,
+ xcb_font,
+ strlen(fontname),
+ fontname);
+
+ /* We also need the fontheight to configure our bars accordingly */
+ xcb_list_fonts_with_info_cookie_t cookie;
+ cookie = xcb_list_fonts_with_info(xcb_connection,
+ 1,
+ strlen(fontname),
+ fontname);
+
+ /* The varios Watchers to communicate with xcb */
+ xcb_io = malloc(sizeof(ev_io));
+ xcb_prep = malloc(sizeof(ev_prepare));
+ xcb_chk = malloc(sizeof(ev_check));
+
+ ev_io_init(xcb_io, &xcb_io_cb, xcb_get_file_descriptor(xcb_connection), EV_READ);
+ ev_prepare_init(xcb_prep, &xcb_prep_cb);
+ ev_check_init(xcb_chk, &xcb_chk_cb);
+
+ ev_io_start(main_loop, xcb_io);
+ ev_prepare_start(main_loop, xcb_prep);
+ ev_check_start(main_loop, xcb_chk);
+
+ /* Now we get the atoms and save them in a nice data-structure */
+ get_atoms();
+
+ /* Now we calculate the font-height */
+ xcb_list_fonts_with_info_reply_t *reply;
+ reply = xcb_list_fonts_with_info_reply(xcb_connection,
+ cookie,
+ NULL);
+ font_height = reply->font_ascent + reply->font_descent;
+ FREE(reply);
+
+ printf("Calculated Font-height: %d\n", font_height);
+}
+
+/*
+ * Cleanup the xcb-stuff.
+ * Called once, before the program terminates.
+ *
+ */
void clean_xcb() {
- xcb_disconnect(xcb_connection);
+ i3_output *walk;
+ SLIST_FOREACH(walk, outputs, slist) {
+ destroy_window(walk);
+ }
+ FREE_SLIST(outputs, i3_output);
+
+ xcb_disconnect(xcb_connection);
+
+ ev_check_stop(main_loop, xcb_chk);
+ ev_prepare_stop(main_loop, xcb_prep);
+ ev_io_stop(main_loop, xcb_io);
+
+ FREE(xcb_chk);
+ FREE(xcb_prep);
+ FREE(xcb_io);
}
+/*
+ * Get the earlier requested atoms and save them in the prepared data-structure
+ *
+ */
void get_atoms() {
- xcb_intern_atom_reply_t* reply;
- #define ATOM_DO(name) reply = xcb_intern_atom_reply(xcb_connection, atom_cookies[name], NULL); \
- atoms[name] = reply->atom; \
- free(reply);
+ xcb_intern_atom_reply_t *reply;
+ #define ATOM_DO(name) reply = xcb_intern_atom_reply(xcb_connection, atom_cookies[name], NULL); \
+ atoms[name] = reply->atom; \
+ free(reply);
- #include "xcb_atoms.def"
- printf("Got Atoms\n");
+ #include "xcb_atoms.def"
+ printf("Got Atoms\n");
}
-void destroy_windows() {
- i3_output *walk = outputs;
- while(walk != NULL) {
- if (walk->bar == XCB_NONE) {
- continue;
- }
- xcb_destroy_window(xcb_connection, walk->bar);
- walk->bar = XCB_NONE;
- }
+/*
+ * Destroy the bar of the specified output
+ *
+ */
+void destroy_window(i3_output *output) {
+ if (output == NULL) {
+ return;
+ }
+ if (output->bar == XCB_NONE) {
+ return;
+ }
+ xcb_destroy_window(xcb_connection, output->bar);
+ output->bar = XCB_NONE;
}
-void create_windows() {
- uint32_t mask;
- uint32_t values[2];
-
- i3_output* walk = outputs;
- while (walk != NULL) {
- if (!walk->active) {
- walk = walk->next;
- continue;
- }
- printf("Creating Window for output %s\n", walk->name);
-
- walk->bar = xcb_generate_id(xcb_connection);
- mask = XCB_CW_BACK_PIXEL;
- values[0] = xcb_screens->black_pixel;
- xcb_create_window(xcb_connection,
- xcb_screens->root_depth,
- walk->bar,
- xcb_root,
- walk->rect.x, walk->rect.y,
- walk->rect.w, 20,
- 1,
- XCB_WINDOW_CLASS_INPUT_OUTPUT,
- xcb_screens->root_visual,
- mask,
- values);
-
- xcb_change_property(xcb_connection,
- XCB_PROP_MODE_REPLACE,
- walk->bar,
- atoms[_NET_WM_WINDOW_TYPE],
- atoms[ATOM],
- 32,
- 1,
- (unsigned char*) &atoms[_NET_WM_WINDOW_TYPE_DOCK]);
-
- walk->bargc = xcb_generate_id(xcb_connection);
- xcb_create_gc(xcb_connection,
- walk->bargc,
- walk->bar,
- 0,
- NULL);
-
- xcb_map_window(xcb_connection, walk->bar);
- walk = walk->next;
- }
- xcb_flush(xcb_connection);
+/*
+ * Reconfigure all bars and create new for newly activated outputs
+ *
+ */
+void reconfig_windows() {
+ uint32_t mask;
+ uint32_t values[4];
+
+ i3_output *walk;
+ SLIST_FOREACH(walk, outputs, slist) {
+ if (!walk->active) {
+ /* If an output is not active, we destroy it's bar */
+ /* FIXME: Maybe we rather want to unmap? */
+ printf("Destroying window for output %s\n", walk->name);
+ destroy_window(walk);
+ continue;
+ }
+ if (walk->bar == XCB_NONE) {
+ printf("Creating Window for output %s\n", walk->name);
+
+ walk->bar = xcb_generate_id(xcb_connection);
+ mask = XCB_CW_BACK_PIXEL | XCB_CW_EVENT_MASK;
+ /* Black background */
+ values[0] = xcb_screens->black_pixel;
+ /* The events we want to receive */
+ values[1] = XCB_EVENT_MASK_EXPOSURE |
+ XCB_EVENT_MASK_BUTTON_PRESS;
+ xcb_create_window(xcb_connection,
+ xcb_screens->root_depth,
+ walk->bar,
+ xcb_root,
+ walk->rect.x, walk->rect.y,
+ walk->rect.w, font_height + 6,
+ 1,
+ XCB_WINDOW_CLASS_INPUT_OUTPUT,
+ xcb_screens->root_visual,
+ mask,
+ values);
+
+ /* We want dock-windows (for now) */
+ xcb_change_property(xcb_connection,
+ XCB_PROP_MODE_REPLACE,
+ walk->bar,
+ atoms[_NET_WM_WINDOW_TYPE],
+ atoms[ATOM],
+ 32,
+ 1,
+ (unsigned char*) &atoms[_NET_WM_WINDOW_TYPE_DOCK]);
+
+ /* We also want a graphics-context (the "canvas" on which we draw) */
+ walk->bargc = xcb_generate_id(xcb_connection);
+ mask = XCB_GC_FONT;
+ values[0] = xcb_font;
+ xcb_create_gc(xcb_connection,
+ walk->bargc,
+ walk->bar,
+ mask,
+ values);
+
+ /* We finally map the bar (display it on screen) */
+ xcb_map_window(xcb_connection, walk->bar);
+ } else {
+ /* We already have a bar, so we just reconfigure it */
+ mask = XCB_CONFIG_WINDOW_X |
+ XCB_CONFIG_WINDOW_Y |
+ XCB_CONFIG_WINDOW_WIDTH |
+ XCB_CONFIG_WINDOW_HEIGHT;
+ values[0] = walk->rect.x;
+ values[1] = walk->rect.y + walk->rect.h - font_height - 6;
+ values[2] = walk->rect.w;
+ values[3] = font_height + 6;
+ printf("Reconfiguring Window for output %s to %d,%d\n", walk->name, values[0], values[1]);
+ xcb_configure_window(xcb_connection,
+ walk->bar,
+ mask,
+ values);
+ }
+ }
}
-void draw_buttons() {
- printf("Drawing Buttons...\n");
- i3_output *outputs_walk = outputs;
- int i = 0;
- xcb_font_t button_font = xcb_generate_id(xcb_connection);
- char *fontname = "-misc-fixed-medium-r-semicondensed--12-110-75-75-c-60-iso10646-1";
- xcb_open_font(xcb_connection,
- button_font,
- strlen(fontname),
- fontname);
- xcb_change_gc(xcb_connection,
- outputs_walk->bargc,
- XCB_GC_FONT,
- &button_font);
- while (outputs_walk != NULL) {
- if (!outputs_walk->active) {
- printf("Output %s inactive, skipping...\n", outputs_walk->name);
- outputs_walk = outputs_walk->next;
- continue;
- }
- if (outputs_walk->bar == XCB_NONE) {
- create_windows();
- }
- uint32_t color = get_colorpixel("000000");
- xcb_change_gc(xcb_connection,
- outputs_walk->bargc,
- XCB_GC_FOREGROUND,
- &color);
- xcb_rectangle_t rect = { 0, 0, outputs_walk->rect.w, 20 };
- xcb_poly_fill_rectangle(xcb_connection,
- outputs_walk->bar,
- outputs_walk->bargc,
- 1,
- &rect);
- i3_ws *ws_walk = workspaces;
- while (ws_walk != NULL) {
- if (ws_walk->output != outputs_walk) {
- printf("WS %s on wrong output, skipping...\n", ws_walk->name);
- ws_walk = ws_walk->next;
- continue;
- }
- printf("Drawing Button for WS %s...\n", ws_walk->name);
- uint32_t color = get_colorpixel("240000");
- if (ws_walk->visible) {
- color = get_colorpixel("480000");
- }
- if (ws_walk->urgent) {
- color = get_colorpixel("002400");
- }
- xcb_change_gc(xcb_connection,
- outputs_walk->bargc,
- XCB_GC_FOREGROUND,
- &color);
- xcb_change_gc(xcb_connection,
- outputs_walk->bargc,
- XCB_GC_BACKGROUND,
- &color);
- xcb_rectangle_t rect = { i + 1, 1, 18, 18 };
- xcb_poly_fill_rectangle(xcb_connection,
- outputs_walk->bar,
- outputs_walk->bargc,
- 1,
- &rect);
- color = get_colorpixel("FFFFFF");
- xcb_change_gc(xcb_connection,
- outputs_walk->bargc,
- XCB_GC_FOREGROUND,
- &color);
- xcb_image_text_8(xcb_connection,
- strlen(ws_walk->name),
- outputs_walk->bar,
- outputs_walk->bargc,
- i + 3, 14,
- ws_walk->name);
- i += 20;
- ws_walk = ws_walk->next;
- }
- outputs_walk = outputs_walk->next;
- i = 0;
- }
- xcb_flush(xcb_connection);
+/*
+ * Render the bars, with buttons and statusline
+ *
+ */
+void draw_bars() {
+ printf("Drawing Bars...\n");
+ int i = 0;
+ i3_output *outputs_walk;
+ SLIST_FOREACH(outputs_walk, outputs, slist) {
+ if (!outputs_walk->active) {
+ printf("Output %s inactive, skipping...\n", outputs_walk->name);
+ continue;
+ }
+ if (outputs_walk->bar == XCB_NONE) {
+ reconfig_windows();
+ }
+ uint32_t color = get_colorpixel("000000");
+ xcb_change_gc(xcb_connection,
+ outputs_walk->bargc,
+ XCB_GC_FOREGROUND,
+ &color);
+ xcb_rectangle_t rect = { 0, 0, outputs_walk->rect.w, font_height + 6 };
+ xcb_poly_fill_rectangle(xcb_connection,
+ outputs_walk->bar,
+ outputs_walk->bargc,
+ 1,
+ &rect);
+ if (statusline != NULL) {
+ printf("Printing statusline!\n");
+ xcb_change_gc(xcb_connection,
+ outputs_walk->bargc,
+ XCB_GC_BACKGROUND,
+ &color);
+ color = get_colorpixel("FFFFFF");
+ xcb_change_gc(xcb_connection,
+ outputs_walk->bargc,
+ XCB_GC_FOREGROUND,
+ &color);
+
+ int glyph_count;
+ xcb_char2b_t *text = (xcb_char2b_t*) convert_utf8_to_ucs2(statusline, &glyph_count);
+
+ xcb_void_cookie_t cookie;
+ cookie = xcb_image_text_16(xcb_connection,
+ glyph_count,
+ outputs_walk->bar,
+ outputs_walk->bargc,
+ outputs_walk->rect.w - get_string_width(text, glyph_count) - 4,
+ font_height + 1,
+ (xcb_char2b_t*) text);
+
+ xcb_generic_error_t *err = xcb_request_check(xcb_connection, cookie);
+
+ if (err != NULL) {
+ printf("XCB-Error: %d\n", err->error_code);
+ }
+ }
+ i3_ws *ws_walk;
+ TAILQ_FOREACH(ws_walk, outputs_walk->workspaces, tailq) {
+ printf("Drawing Button for WS %s at x = %d\n", ws_walk->name, i);
+ uint32_t color = get_colorpixel("240000");
+ if (ws_walk->visible) {
+ color = get_colorpixel("480000");
+ }
+ if (ws_walk->urgent) {
+ printf("WS %s is urgent!\n", ws_walk->name);
+ color = get_colorpixel("002400");
+ }
+ xcb_change_gc(xcb_connection,
+ outputs_walk->bargc,
+ XCB_GC_FOREGROUND,
+ &color);
+ xcb_change_gc(xcb_connection,
+ outputs_walk->bargc,
+ XCB_GC_BACKGROUND,
+ &color);
+ xcb_rectangle_t rect = { i + 1, 1, ws_walk->name_width + 8, font_height + 4 };
+ xcb_poly_fill_rectangle(xcb_connection,
+ outputs_walk->bar,
+ outputs_walk->bargc,
+ 1,
+ &rect);
+ color = get_colorpixel("FFFFFF");
+ xcb_change_gc(xcb_connection,
+ outputs_walk->bargc,
+ XCB_GC_FOREGROUND,
+ &color);
+ xcb_image_text_16(xcb_connection,
+ ws_walk->name_glyphs,
+ outputs_walk->bar,
+ outputs_walk->bargc,
+ i + 5, font_height + 1,
+ ws_walk->ucs2_name);
+ i += 10 + ws_walk->name_width;
+ }
+
+ i = 0;
+ }
}
projects / i3 / i3 / blobdiff