+/*
+ * 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 "common.h"
+/* We save the Atoms in an easy to access array, indexed by an enum */
#define NUM_ATOMS 3
enum {
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;
-xcb_event_handlers_t xcb_event_handlers;
-
+/*
+ * 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'} ,
return (r << 16 | g << 8 | b);
}
+/*
+ * 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) {
return;
}
+ /* TODO: Move this to exern get_ws_for_output() */
TAILQ_FOREACH(cur_ws, walk->workspaces, tailq) {
if (cur_ws->visible) {
break;
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;
case 4:
- if (cur_ws == TAILQ_LAST(walk->workspaces, ws_head)) {
- cur_ws = TAILQ_FIRST(walk->workspaces);
+ /* 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_NEXT(cur_ws, tailq);
+ cur_ws = TAILQ_PREV(cur_ws, ws_head, tailq);
}
break;
case 5:
- if (cur_ws == TAILQ_FIRST(walk->workspaces)) {
- cur_ws = TAILQ_LAST(walk->workspaces, ws_head);
+ /* 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_PREV(cur_ws, ws_head, tailq);
+ cur_ws = TAILQ_NEXT(cur_ws, tailq);
}
break;
}
i3_send_msg(I3_IPC_MESSAGE_TYPE_COMMAND, buffer);
}
-void handle_xcb_event(xcb_generic_event_t *event) {
+/*
+ * 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;
}
-}
-
-void xcb_prep_cb(struct ev_loop *loop, ev_prepare *watcher, int revenst) {
- xcb_flush(xcb_connection);
-}
-
-void xcb_chk_cb(struct ev_loop *loop, ev_check *watcher, int revents) {
- xcb_generic_event_t *event;
- if ((event = xcb_poll_for_event(xcb_connection)) != NULL) {
- handle_xcb_event(event);
- }
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) {
- /* Dummy Callback. We only need this, so that xcb-events trigger
- * Prepare- and Check-Watchers */
}
+/*
+ * 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;
int width;
cookie = xcb_query_text_extents(xcb_connection, xcb_font, glyph_len, string);
- if ((reply = xcb_query_text_extents_reply(xcb_connection, cookie, &error)) == NULL) {
+ reply = xcb_query_text_extents_reply(xcb_connection, cookie, &error);
+ if (reply == NULL) {
printf("ERROR: Could not get text extents!");
return 7;
}
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);
/* 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"
+ #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);
- 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);
+ /* 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_prepare_start(main_loop, xcb_prep);
ev_check_start(main_loop, xcb_chk);
- /* FIXME: Maybe we can push that further backwards */
+ /* 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() {
+ 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);
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); \
printf("Got Atoms\n");
}
+/*
+ * Destroy the bar of the specified output
+ *
+ */
void destroy_window(i3_output *output) {
if (output == NULL) {
return;
output->bar = XCB_NONE;
}
+/*
+ * 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;
}
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,
mask,
values);
+ /* We want dock-windows (for now) */
xcb_change_property(xcb_connection,
XCB_PROP_MODE_REPLACE,
walk->bar,
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;
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;
+ values[1] = walk->rect.y + walk->rect.h - font_height - 6;
values[2] = walk->rect.w;
- values[3] = walk->rect.h;
+ 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);
}
}
- xcb_flush(xcb_connection);
}
+/*
+ * Render the bars, with buttons and statusline
+ *
+ */
void draw_bars() {
printf("Drawing Bars...\n");
int i = 0;
i = 0;
}
- xcb_flush(xcb_connection);
}
projects / i3 / i3 / blobdiff