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This commit is contained in:
Axel Wagner
2010-08-07 02:10:05 +02:00
parent b1a8ddd9d7
commit cee972280d
10 changed files with 389 additions and 42 deletions
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115
i3bar/src/xcb.c
View File

@ -9,6 +9,7 @@
#include "common.h"
/* We save the Atoms in an easy to access array, indexed by an enum */
#define NUM_ATOMS 3
enum {
@ -19,17 +20,22 @@ 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'} ,
@ -40,8 +46,16 @@ uint32_t get_colorpixel(const char *s) {
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) {
@ -55,6 +69,7 @@ void handle_button(xcb_button_press_event_t *event) {
return;
}
/* TODO: Move this to exern get_ws_for_output() */
TAILQ_FOREACH(cur_ws, walk->workspaces, tailq) {
if (cur_ws->visible) {
break;
@ -72,6 +87,8 @@ void handle_button(xcb_button_press_event_t *event) {
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) {
@ -84,17 +101,19 @@ void handle_button(xcb_button_press_event_t *event) {
}
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, ws_head)) {
cur_ws = TAILQ_LAST(walk->workspaces);
} else {
cur_ws = TAILQ_NEXT(cur_ws, tailq);
cur_ws = TAILQ_PREV(cur_ws, 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)) {
cur_ws = TAILQ_FIRST(walk->workspaces, ws_head);
} else {
cur_ws = TAILQ_PREV(cur_ws, ws_head, tailq);
cur_ws = TAILQ_NEXT(cur_ws, ws_head, tailq);
}
break;
}
@ -104,21 +123,42 @@ void handle_button(xcb_button_press_event_t *event) {
i3_send_msg(I3_IPC_MESSAGE_TYPE_COMMAND, buffer);
}
/*
* An X-Event occured, we determine, what kind and call the appropriate handler
*
* FIXME: Merge this in ev_chk_cb(), the additional call is superflous
*
*/
void handle_xcb_event(xcb_generic_event_t *event) {
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;
}
}
/*
* 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.
*
* FIXME: use a while-loop, to account for the xcb buffer
*
*/
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) {
@ -127,11 +167,20 @@ void xcb_chk_cb(struct ev_loop *loop, ev_check *watcher, int revents) {
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;
@ -139,7 +188,8 @@ int get_string_width(xcb_char2b_t *string, int glyph_len) {
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;
}
@ -149,6 +199,10 @@ int get_string_width(xcb_char2b_t *string, int glyph_len) {
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);
@ -160,30 +214,35 @@ void init_xcb(char *fontname) {
/* 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);
/* FIXME: push this to the end of init_xcb() */
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));
@ -196,11 +255,17 @@ void init_xcb(char *fontname) {
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();
}
/*
* Cleanup the xcb-stuff.
* Called once, before the program terminates.
*
*/
void clean_xcb() {
/* FIXME: destroy() the bars first */
xcb_disconnect(xcb_connection);
ev_check_stop(main_loop, xcb_chk);
@ -212,6 +277,10 @@ void clean_xcb() {
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); \
@ -222,6 +291,10 @@ void get_atoms() {
printf("Got Atoms\n");
}
/*
* Destroy the bar of the specified output
*
*/
void destroy_window(i3_output *output) {
if (output == NULL) {
return;
@ -233,6 +306,10 @@ void destroy_window(i3_output *output) {
output->bar = XCB_NONE;
}
/*
* Reconfigure all bars and create new for newly activated outputs
*
*/
void reconfig_windows() {
uint32_t mask;
uint32_t values[4];
@ -240,6 +317,8 @@ void reconfig_windows() {
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;
@ -249,7 +328,9 @@ void reconfig_windows() {
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,
@ -264,6 +345,7 @@ void reconfig_windows() {
mask,
values);
/* We want dock-windows (for now) */
xcb_change_property(xcb_connection,
XCB_PROP_MODE_REPLACE,
walk->bar,
@ -273,6 +355,7 @@ void reconfig_windows() {
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;
@ -282,8 +365,10 @@ void reconfig_windows() {
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 |
@ -301,6 +386,10 @@ void reconfig_windows() {
}
}
/*
* Render the bars, with buttons and statusline
*
*/
void draw_bars() {
printf("Drawing Bars...\n");
int i = 0;