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xcb.c
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xcb.c
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/*
* vim:ts=4:sw=4:expandtab
*
* i3bar - an xcb-based status- and ws-bar for i3
* © 2010 Axel Wagner and contributors (see also: LICENSE)
*
* xcb.c: Communicating with X
*
*/
#include "common.h"
#include <err.h>
#include <ev.h>
#include <i3/ipc.h>
#include <stdlib.h>
#include <string.h>
#include <xcb/xcb_aux.h>
#include <xcb/xcb_cursor.h>
#include <xcb/xkb.h>
#ifdef I3_ASAN_ENABLED
#include <sanitizer/lsan_interface.h>
#endif
#include "libi3.h"
/* We save the atoms in an easy to access array, indexed by an enum */
enum {
#define ATOM_DO(name) name,
#include "xcb_atoms.def"
NUM_ATOMS
};
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;
int screen;
xcb_screen_t *root_screen;
xcb_window_t xcb_root;
static xcb_cursor_t cursor;
/* selection window for tray support */
static xcb_window_t selwin = XCB_NONE;
static xcb_intern_atom_reply_t *tray_reply = NULL;
/* This is needed for integration with libi3 */
xcb_connection_t *conn;
/* The font we'll use */
static i3Font font;
/* Icon size (based on font size) */
int icon_size;
xcb_visualtype_t *visual_type;
uint8_t depth;
xcb_colormap_t colormap;
/* Overall height of the bar (based on font size) */
int bar_height;
/* These are only relevant for XKB, which we only need for grabbing modifiers */
int xkb_base;
bool mod_pressed = 0;
/* Event watchers, to interact with the user */
ev_prepare *xcb_prep;
ev_io *xcb_io;
ev_io *xkb_io;
/* The name of current binding mode */
static mode binding;
/* Indicates whether a new binding mode was recently activated */
bool activated_mode = false;
/* The output in which the tray should be displayed. */
static i3_output *output_for_tray;
/* The parsed colors */
struct xcb_colors_t {
color_t bar_fg;
color_t bar_bg;
color_t sep_fg;
color_t focus_bar_fg;
color_t focus_bar_bg;
color_t focus_sep_fg;
color_t active_ws_fg;
color_t active_ws_bg;
color_t active_ws_border;
color_t inactive_ws_fg;
color_t inactive_ws_bg;
color_t inactive_ws_border;
color_t urgent_ws_bg;
color_t urgent_ws_fg;
color_t urgent_ws_border;
color_t focus_ws_bg;
color_t focus_ws_fg;
color_t focus_ws_border;
color_t binding_mode_bg;
color_t binding_mode_fg;
color_t binding_mode_border;
};
struct xcb_colors_t colors;
/* Horizontal offset between a workspace label and button borders */
static const int ws_hoff_px = 4;
/* Vertical offset between a workspace label and button borders */
static const int ws_voff_px = 3;
/* Offset between two workspace buttons */
static const int ws_spacing_px = 1;
/* Offset between the statusline and 1) workspace buttons on the left
* 2) the tray or screen edge on the right */
static const int sb_hoff_px = 4;
/* Additional offset between the tray and the statusline, if the tray is not empty */
static const int tray_loff_px = 2;
/* Vertical offset between the bar and a separator */
static const int sep_voff_px = 4;
/* Cached width of the custom separator if one was set */
int separator_symbol_width;
int _xcb_request_failed(xcb_void_cookie_t cookie, char *err_msg, int line) {
xcb_generic_error_t *err;
if ((err = xcb_request_check(xcb_connection, cookie)) != NULL) {
fprintf(stderr, "[%s:%d] ERROR: %s. X Error Code: %d\n", __FILE__, line, err_msg, err->error_code);
return err->error_code;
}
return 0;
}
static uint32_t get_sep_offset(struct status_block *block) {
if (!block->no_separator && block->sep_block_width > 0)
return block->sep_block_width / 2 + block->sep_block_width % 2;
return 0;
}
static int get_tray_width(struct tc_head *trayclients) {
trayclient *trayclient;
int tray_width = 0;
TAILQ_FOREACH_REVERSE (trayclient, trayclients, tc_head, tailq) {
if (!trayclient->mapped)
continue;
tray_width += icon_size + logical_px(config.tray_padding);
}
if (tray_width > 0)
tray_width += logical_px(tray_loff_px);
return tray_width;
}
/*
* Draws a separator for the given block if necessary.
*
*/
static void draw_separator(i3_output *output, uint32_t x, struct status_block *block, bool use_focus_colors) {
color_t sep_fg = (use_focus_colors ? colors.focus_sep_fg : colors.sep_fg);
color_t bar_bg = (use_focus_colors ? colors.focus_bar_bg : colors.bar_bg);
uint32_t sep_offset = get_sep_offset(block);
if (TAILQ_NEXT(block, blocks) == NULL || sep_offset == 0)
return;
uint32_t center_x = x - sep_offset;
if (config.separator_symbol == NULL) {
/* Draw a classic one pixel, vertical separator. */
draw_util_rectangle(&output->statusline_buffer, sep_fg,
center_x,
logical_px(sep_voff_px),
logical_px(1),
bar_height - 2 * logical_px(sep_voff_px));
} else {
/* Draw a custom separator. */
uint32_t separator_x = MAX(x - block->sep_block_width, center_x - separator_symbol_width / 2);
draw_util_text(config.separator_symbol, &output->statusline_buffer, sep_fg, bar_bg,
separator_x, logical_px(ws_voff_px), x - separator_x);
}
}
static uint32_t predict_statusline_length(bool use_short_text) {
uint32_t width = 0;
struct status_block *block;
TAILQ_FOREACH (block, &statusline_head, blocks) {
i3String *text = block->full_text;
struct status_block_render_desc *render = &block->full_render;
if (use_short_text && block->short_text != NULL) {
text = block->short_text;
render = &block->short_render;
}
if (i3string_get_num_bytes(text) == 0)
continue;
render->width = predict_text_width(text);
if (block->border)
render->width += logical_px(block->border_left + block->border_right);
/* Compute offset and append for text aligment in min_width. */
if (block->min_width <= render->width) {
render->x_offset = 0;
render->x_append = 0;
} else {
uint32_t padding_width = block->min_width - render->width;
switch (block->align) {
case ALIGN_LEFT:
render->x_append = padding_width;
break;
case ALIGN_RIGHT:
render->x_offset = padding_width;
break;
case ALIGN_CENTER:
render->x_offset = padding_width / 2;
render->x_append = padding_width / 2 + padding_width % 2;
break;
}
}
width += render->width + render->x_offset + render->x_append;
/* If this is not the last block, add some pixels for a separator. */
if (TAILQ_NEXT(block, blocks) != NULL)
width += block->sep_block_width;
}
return width;
}
/*
* Redraws the statusline to the output's statusline_buffer
*/
static void draw_statusline(i3_output *output, uint32_t clip_left, bool use_focus_colors, bool use_short_text) {
struct status_block *block;
color_t bar_color = (use_focus_colors ? colors.focus_bar_bg : colors.bar_bg);
draw_util_clear_surface(&output->statusline_buffer, bar_color);
/* Use unsigned integer wraparound to clip off the left side.
* For example, if clip_left is 75, then x will start at the very large
* number INT_MAX-75, which is way outside the surface dimensions. Drawing
* to that x position is a no-op which XCB and Cairo safely ignore. Once x moves
* up by 75 and goes past INT_MAX, it will wrap around again to 0, and we start
* actually rendering content to the surface. */
uint32_t x = 0 - clip_left;
/* Draw the text of each block */
TAILQ_FOREACH (block, &statusline_head, blocks) {
i3String *text = block->full_text;
struct status_block_render_desc *render = &block->full_render;
if (use_short_text && block->short_text != NULL) {
text = block->short_text;
render = &block->short_render;
}
if (i3string_get_num_bytes(text) == 0)
continue;
color_t fg_color;
if (block->urgent) {
fg_color = colors.urgent_ws_fg;
} else if (block->color) {
fg_color = draw_util_hex_to_color(block->color);
} else if (use_focus_colors) {
fg_color = colors.focus_bar_fg;
} else {
fg_color = colors.bar_fg;
}
color_t bg_color = bar_color;
int full_render_width = render->width + render->x_offset + render->x_append;
int has_border = block->border ? 1 : 0;
if (block->border || block->background || block->urgent) {
/* Let's determine the colors first. */
color_t border_color = bar_color;
if (block->urgent) {
border_color = colors.urgent_ws_border;
bg_color = colors.urgent_ws_bg;
} else {
if (block->border)
border_color = draw_util_hex_to_color(block->border);
if (block->background)
bg_color = draw_util_hex_to_color(block->background);
}
/* Draw the border. */
draw_util_rectangle(&output->statusline_buffer, border_color,
x, logical_px(1),
full_render_width,
bar_height - logical_px(2));
/* Draw the background. */
draw_util_rectangle(&output->statusline_buffer, bg_color,
x + has_border * logical_px(block->border_left),
logical_px(1) + has_border * logical_px(block->border_top),
full_render_width - has_border * logical_px(block->border_right + block->border_left),
bar_height - has_border * logical_px(block->border_bottom + block->border_top) - logical_px(2));
}
draw_util_text(text, &output->statusline_buffer, fg_color, bg_color,
x + render->x_offset + has_border * logical_px(block->border_left),
bar_height / 2 - font.height / 2,
render->width - has_border * logical_px(block->border_left + block->border_right));
x += full_render_width;
/* If this is not the last block, draw a separator. */
if (TAILQ_NEXT(block, blocks) != NULL) {
x += block->sep_block_width;
draw_separator(output, x, block, use_focus_colors);
}
}
}
/*
* Hides all bars (unmaps them)
*
*/
static void hide_bars(void) {
if ((config.hide_on_modifier == M_DOCK) || (config.hidden_state == S_SHOW && config.hide_on_modifier == M_HIDE)) {
return;
}
i3_output *walk;
SLIST_FOREACH (walk, outputs, slist) {
if (!walk->active) {
continue;
}
xcb_unmap_window(xcb_connection, walk->bar.id);
}
stop_child();
}
/*
* Unhides all bars (maps them)
*
*/
static void unhide_bars(void) {
if (config.hide_on_modifier != M_HIDE) {
return;
}
i3_output *walk;
xcb_void_cookie_t cookie;
uint32_t mask;
uint32_t values[5];
cont_child();
SLIST_FOREACH (walk, outputs, slist) {
if (walk->bar.id == XCB_NONE) {
continue;
}
mask = XCB_CONFIG_WINDOW_X |
XCB_CONFIG_WINDOW_Y |
XCB_CONFIG_WINDOW_WIDTH |
XCB_CONFIG_WINDOW_HEIGHT |
XCB_CONFIG_WINDOW_STACK_MODE;
values[0] = walk->rect.x;
if (config.position == POS_TOP)
values[1] = walk->rect.y;
else
values[1] = walk->rect.y + walk->rect.h - bar_height;
values[2] = walk->rect.w;
values[3] = bar_height;
values[4] = XCB_STACK_MODE_ABOVE;
DLOG("Reconfiguring window for output %s to %d,%d\n", walk->name, values[0], values[1]);
cookie = xcb_configure_window_checked(xcb_connection,
walk->bar.id,
mask,
values);
if (xcb_request_failed(cookie, "Could not reconfigure window")) {
exit(EXIT_FAILURE);
}
xcb_map_window(xcb_connection, walk->bar.id);
}
}
/*
* Parse the colors into a format that we can use
*
*/
void init_colors(const struct xcb_color_strings_t *new_colors) {
#define PARSE_COLOR(name, def) \
do { \
colors.name = draw_util_hex_to_color(new_colors->name ? new_colors->name : def); \
} while (0)
PARSE_COLOR(bar_fg, "#FFFFFF");
PARSE_COLOR(bar_bg, "#000000");
PARSE_COLOR(sep_fg, "#666666");
PARSE_COLOR(active_ws_fg, "#FFFFFF");
PARSE_COLOR(active_ws_bg, "#333333");
PARSE_COLOR(active_ws_border, "#333333");
PARSE_COLOR(inactive_ws_fg, "#888888");
PARSE_COLOR(inactive_ws_bg, "#222222");
PARSE_COLOR(inactive_ws_border, "#333333");
PARSE_COLOR(urgent_ws_fg, "#FFFFFF");
PARSE_COLOR(urgent_ws_bg, "#900000");
PARSE_COLOR(urgent_ws_border, "#2f343a");
PARSE_COLOR(focus_ws_fg, "#FFFFFF");
PARSE_COLOR(focus_ws_bg, "#285577");
PARSE_COLOR(focus_ws_border, "#4c7899");
#undef PARSE_COLOR
#define PARSE_COLOR_FALLBACK(name, fallback) \
do { \
colors.name = new_colors->name ? draw_util_hex_to_color(new_colors->name) : colors.fallback; \
} while (0)
/* For the binding mode indicator colors, we don't hardcode a default.
* Instead, we fall back to urgent_ws_* colors. */
PARSE_COLOR_FALLBACK(binding_mode_fg, urgent_ws_fg);
PARSE_COLOR_FALLBACK(binding_mode_bg, urgent_ws_bg);
PARSE_COLOR_FALLBACK(binding_mode_border, urgent_ws_border);
/* Similarly, for unspecified focused bar colors, we fall back to the
* regular bar colors. */
PARSE_COLOR_FALLBACK(focus_bar_fg, bar_fg);
PARSE_COLOR_FALLBACK(focus_bar_bg, bar_bg);
PARSE_COLOR_FALLBACK(focus_sep_fg, sep_fg);
#undef PARSE_COLOR_FALLBACK
init_tray_colors();
xcb_flush(xcb_connection);
}
static bool execute_custom_command(xcb_keycode_t input_code, bool event_is_release) {
binding_t *binding;
TAILQ_FOREACH (binding, &(config.bindings), bindings) {
if ((binding->input_code != input_code) || (binding->release != event_is_release))
continue;
i3_send_msg(I3_IPC_MESSAGE_TYPE_RUN_COMMAND, binding->command);
return true;
}
return false;
}
static void child_handle_button(xcb_button_press_event_t *event, i3_output *output, uint32_t statusline_x, uint32_t statusline_y) {
if (statusline_x > (uint32_t)output->statusline_width) {
return;
}
/* x of the start of the current block relative to the statusline. */
uint32_t last_block_x = 0;
struct status_block *block;
TAILQ_FOREACH (block, &statusline_head, blocks) {
i3String *text;
struct status_block_render_desc *render;
if (output->statusline_short_text && block->short_text != NULL) {
text = block->short_text;
render = &block->short_render;
} else {
text = block->full_text;
render = &block->full_render;
}
if (i3string_get_num_bytes(text) == 0) {
continue;
}
/* Include the whole block in our calculations: when min_width is
* specified, we have to take padding width into account. */
const uint32_t full_render_width = render->width + render->x_offset + render->x_append;
/* x of the click event relative to the current block. */
const uint32_t relative_x = statusline_x - last_block_x;
if (relative_x <= full_render_width) {
const uint32_t output_x = event->event_x;
const uint32_t output_y = statusline_y + event->event_y;
send_block_clicked(event->detail, block->name, block->instance,
event->root_x, event->root_y, relative_x,
event->event_y, output_x, output_y,
full_render_width, bar_height,
event->state);
return;
}
last_block_x += full_render_width + block->sep_block_width;
if (last_block_x > statusline_x) {
/* Click was on a separator. */
return;
}
}
}
/*
* Predict the width of a workspace button or the current binding mode indicator.
*
*/
static int predict_button_width(int name_width) {
return MAX(name_width + 2 * logical_px(ws_hoff_px) + 2 * logical_px(1),
logical_px(config.ws_min_width));
}
/*
* Handle a button press event (i.e. a mouse click on one of our bars).
* We determine, whether the click occurred on a workspace button or if the scroll-
* wheel was used and change the workspace appropriately
*
*/
static void handle_button(xcb_button_press_event_t *event) {
/* Determine, which bar was clicked */
i3_output *walk;
xcb_window_t bar = event->event;
SLIST_FOREACH (walk, outputs, slist) {
if (walk->bar.id == bar) {
break;
}
}
if (walk == NULL) {
DLOG("Unknown bar clicked!\n");
return;
}
DLOG("Got button %d\n", event->detail);
/* During button release events, only check for custom commands. */
const bool event_is_release = (event->response_type & ~0x80) == XCB_BUTTON_RELEASE;
int32_t x = event->event_x >= 0 ? event->event_x : 0;
int workspace_width = 0;
i3_ws *cur_ws = NULL, *clicked_ws = NULL, *ws_walk;
TAILQ_FOREACH (ws_walk, walk->workspaces, tailq) {
int w = predict_button_width(ws_walk->name_width);
if (x >= workspace_width && x <= workspace_width + w)
clicked_ws = ws_walk;
if (ws_walk->visible)
cur_ws = ws_walk;
workspace_width += w;
if (TAILQ_NEXT(ws_walk, tailq) != NULL)
workspace_width += logical_px(ws_spacing_px);
}
if (child_want_click_events() && x > workspace_width) {
const int tray_width = get_tray_width(walk->trayclients);
/* Calculate the horizontal coordinate (x) of the start of the
* statusline by subtracting its width and the width of the tray from
* the bar width. */
const int offset_x = walk->rect.w - walk->statusline_width -
tray_width - logical_px((tray_width > 0) * sb_hoff_px);
if (x >= offset_x) {
/* Click was after the start of the statusline, return to avoid
* executing any other actions even if a click event is not
* produced eventually. */
if (!event_is_release) {
/* x of the click event relative to the start of the
* statusline. */
const uint32_t statusline_x = x - offset_x;
const uint32_t statusline_y = event->root_y - walk->rect.y - event->event_y;
child_handle_button(event, walk, statusline_x, statusline_y);
}
return;
}
}
/* If a custom command was specified for this mouse button, it overrides
* the default behavior. */
if (execute_custom_command(event->detail, event_is_release) || event_is_release) {
return;
}
if (cur_ws == NULL) {
DLOG("No workspace active?\n");
return;
}
switch (event->detail) {
case XCB_BUTTON_SCROLL_UP:
case XCB_BUTTON_SCROLL_LEFT:
/* Mouse wheel up. We select the previous ws, if any.
* If there is no more workspace, don’t even send the workspace
* command, otherwise (with workspace auto_back_and_forth) we’d end
* up on the wrong workspace. */
if (cur_ws == TAILQ_FIRST(walk->workspaces))
return;
cur_ws = TAILQ_PREV(cur_ws, ws_head, tailq);
break;
case XCB_BUTTON_SCROLL_DOWN:
case XCB_BUTTON_SCROLL_RIGHT:
/* Mouse wheel down. We select the next ws, if any.
* If there is no more workspace, don’t even send the workspace
* command, otherwise (with workspace auto_back_and_forth) we’d end
* up on the wrong workspace. */
if (cur_ws == TAILQ_LAST(walk->workspaces, ws_head))
return;
cur_ws = TAILQ_NEXT(cur_ws, tailq);
break;
case 1:
cur_ws = clicked_ws;
/* if no workspace was clicked, focus our currently visible
* workspace if it is not already focused */
if (cur_ws == NULL) {
TAILQ_FOREACH (cur_ws, walk->workspaces, tailq) {
if (cur_ws->visible && !cur_ws->focused)
break;
}
}
/* if there is nothing to focus, we are done */
if (cur_ws == NULL)
return;
break;
default:
return;
}
/* To properly handle workspace names with double quotes in them, we need
* to escape the double quotes. Unfortunately, that’s rather ugly in C: We
* first count the number of double quotes, then we allocate a large enough
* buffer, then we copy character by character. */
int num_quotes = 0;
size_t namelen = 0;
const char *utf8_name = cur_ws->canonical_name;
for (const char *walk = utf8_name; *walk != '\0'; walk++) {
if (*walk == '"' || *walk == '\\')
num_quotes++;
/* While we’re looping through the name anyway, we can save one
* strlen(). */
namelen++;
}
const size_t len = namelen + strlen("workspace \"\"") + 1;
char *buffer = scalloc(len + num_quotes, 1);
memcpy(buffer, "workspace \"", strlen("workspace \""));
size_t inpos, outpos;
for (inpos = 0, outpos = strlen("workspace \"");
inpos < namelen;
inpos++, outpos++) {
if (utf8_name[inpos] == '"' || utf8_name[inpos] == '\\') {
buffer[outpos] = '\\';
outpos++;
}
buffer[outpos] = utf8_name[inpos];
}
buffer[outpos] = '"';
i3_send_msg(I3_IPC_MESSAGE_TYPE_RUN_COMMAND, buffer);
free(buffer);
}
/*
* Handle visibility notifications: when none of the bars are visible, e.g.
* if windows are in fullscreen on each output, suspend the child process.
*
*/
static void handle_visibility_notify(xcb_visibility_notify_event_t *event) {
bool visible = (event->state != XCB_VISIBILITY_FULLY_OBSCURED);
int num_visible = 0;
i3_output *output;
SLIST_FOREACH (output, outputs, slist) {
if (!output->active) {
continue;
}
if (output->bar.id == event->window) {
output->visible = visible;
}
num_visible += output->visible;
}
if (num_visible == 0) {
stop_child();
} else {
cont_child();
}
}
/*
* Comparison function to sort trayclients in ascending alphanumeric order
* according to their class.
*
*/
static int reorder_trayclients_cmp(const void *_a, const void *_b) {
trayclient *a = *((trayclient **)_a);
trayclient *b = *((trayclient **)_b);
int result = strcasecmp_nullable(a->class_class, b->class_class);
return result != 0 ? result : strcasecmp_nullable(a->class_instance, b->class_instance);
}
/*
* Adjusts the size of the tray window and alignment of the tray clients by
* configuring their respective x coordinates. To be called when mapping or
* unmapping a tray client window.
*
*/
static void configure_trayclients(void) {
i3_output *output;
SLIST_FOREACH (output, outputs, slist) {
if (!output->active) {
continue;
}
int count = 0;
trayclient *client;
TAILQ_FOREACH (client, output->trayclients, tailq) {
if (client->mapped) {
count++;
}
}
int idx = 0;
trayclient **trayclients = smalloc(count * sizeof(trayclient *));
TAILQ_FOREACH (client, output->trayclients, tailq) {
if (client->mapped) {
trayclients[idx++] = client;
}
}
qsort(trayclients, count, sizeof(trayclient *), reorder_trayclients_cmp);
uint32_t x = output->rect.w;
for (idx = count; idx > 0; idx--) {
x -= icon_size + logical_px(config.tray_padding);
DLOG("Configuring tray window %08x to x=%d\n", trayclients[idx - 1]->win, x);
xcb_configure_window(xcb_connection,
trayclients[idx - 1]->win,
XCB_CONFIG_WINDOW_X,
&x);
}
free(trayclients);
}
}
static trayclient *trayclient_and_output_from_window(xcb_window_t win, i3_output **output) {
i3_output *o_walk;
SLIST_FOREACH (o_walk, outputs, slist) {
if (!o_walk->active) {
continue;
}
trayclient *client;
TAILQ_FOREACH (client, o_walk->trayclients, tailq) {
if (client->win == win) {
if (output) {
*output = o_walk;
}
return client;
}
}
}
return NULL;
}
static trayclient *trayclient_from_window(xcb_window_t win) {
return trayclient_and_output_from_window(win, NULL);
}
static void trayclient_update_class(trayclient *client) {
xcb_get_property_reply_t *prop = xcb_get_property_reply(
conn,
xcb_get_property_unchecked(
xcb_connection,
false,
client->win,
XCB_ATOM_WM_CLASS,
XCB_ATOM_STRING,
0,
32),
NULL);
if (prop == NULL || xcb_get_property_value_length(prop) == 0) {
DLOG("WM_CLASS not set.\n");
free(prop);
return;
}
/* We cannot use asprintf here since this property contains two
* null-terminated strings (for compatibility reasons). Instead, we
* use strdup() on both strings */
const size_t prop_length = xcb_get_property_value_length(prop);
char *new_class = xcb_get_property_value(prop);
const size_t class_class_index = strnlen(new_class, prop_length) + 1;
free(client->class_instance);
free(client->class_class);
client->class_instance = sstrndup(new_class, prop_length);
if (class_class_index < prop_length) {
client->class_class = sstrndup(new_class + class_class_index, prop_length - class_class_index);
} else {
client->class_class = NULL;
}
DLOG("WM_CLASS changed to %s (instance), %s (class)\n", client->class_instance, client->class_class);
free(prop);
}
/*
* Handles ClientMessages (messages sent from another client directly to us).
*
* At the moment, only the tray window will receive client messages. All
* supported client messages currently are _NET_SYSTEM_TRAY_OPCODE.
*
*/
static void handle_client_message(xcb_client_message_event_t *event) {
if (event->type == atoms[I3_SYNC]) {
xcb_window_t window = event->data.data32[0];
uint32_t rnd = event->data.data32[1];
/* Forward the request to i3 via the IPC interface so that all pending
* IPC messages are guaranteed to be handled. */
char *payload = NULL;
sasprintf(&payload, "{\"rnd\":%d, \"window\":%d}", rnd, window);
i3_send_msg(I3_IPC_MESSAGE_TYPE_SYNC, payload);
free(payload);
} else if (event->type == atoms[_NET_SYSTEM_TRAY_OPCODE] &&
event->format == 32) {
DLOG("_NET_SYSTEM_TRAY_OPCODE received\n");
/* event->data.data32[0] is the timestamp */
uint32_t op = event->data.data32[1];
uint32_t mask;
uint32_t values[2];
if (op == SYSTEM_TRAY_REQUEST_DOCK) {
xcb_window_t client = event->data.data32[2];
mask = XCB_CW_EVENT_MASK;
/* Needed to get the most recent value of XEMBED_MAPPED. */
values[0] = XCB_EVENT_MASK_PROPERTY_CHANGE;
/* Needed for UnmapNotify events. */
values[0] |= XCB_EVENT_MASK_STRUCTURE_NOTIFY;
/* Needed because some tray applications (e.g., VLC) use
* override_redirect which causes no ConfigureRequest to be sent. */
values[0] |= XCB_EVENT_MASK_RESIZE_REDIRECT;
xcb_change_window_attributes(xcb_connection, client, mask, values);
/* Request the _XEMBED_INFO property. The XEMBED specification
* (which is referred by the tray specification) says this *has* to
* be set, but VLC does not set it… */
bool map_it = true;
int xe_version = 1;
xcb_get_property_cookie_t xembedc;
xcb_generic_error_t *error;
xembedc = xcb_get_property(xcb_connection,
0,
client,
atoms[_XEMBED_INFO],
XCB_GET_PROPERTY_TYPE_ANY,
0,
2 * 32);
xcb_get_property_reply_t *xembedr = xcb_get_property_reply(xcb_connection,
xembedc,
&error);
if (error != NULL) {
ELOG("Error getting _XEMBED_INFO property: error_code %d\n",
error->error_code);
free(error);
return;
}
if (xembedr != NULL && xembedr->length != 0) {
DLOG("xembed format = %d, len = %d\n", xembedr->format, xembedr->length);
uint32_t *xembed = xcb_get_property_value(xembedr);
DLOG("xembed version = %d\n", xembed[0]);
DLOG("xembed flags = %d\n", xembed[1]);
map_it = ((xembed[1] & XEMBED_MAPPED) == XEMBED_MAPPED);
xe_version = xembed[0];
if (xe_version > 1)
xe_version = 1;
free(xembedr);
} else {
ELOG("Window %08x violates the XEMBED protocol, _XEMBED_INFO not set\n", client);
}
DLOG("X window %08x requested docking\n", client);
if (output_for_tray == NULL) {
ELOG("No output found for tray\n");
return;
}
xcb_void_cookie_t rcookie = xcb_reparent_window(xcb_connection,
client,
output_for_tray->bar.id,
output_for_tray->rect.w - icon_size - logical_px(config.tray_padding),
logical_px(config.tray_padding));
if (xcb_request_failed(rcookie, "Could not reparent window. Maybe it is using an incorrect depth/visual?"))
return;
/* We reconfigure the window to use a reasonable size. The systray
* specification explicitly says:
* Tray icons may be assigned any size by the system tray, and
* should do their best to cope with any size effectively
*/
mask = XCB_CONFIG_WINDOW_WIDTH | XCB_CONFIG_WINDOW_HEIGHT;
values[0] = icon_size;
values[1] = icon_size;
xcb_configure_window(xcb_connection,
client,
mask,
values);
/* send the XEMBED_EMBEDDED_NOTIFY message */
void *event = scalloc(32, 1);
xcb_client_message_event_t *ev = event;
ev->response_type = XCB_CLIENT_MESSAGE;
ev->window = client;
ev->type = atoms[_XEMBED];
ev->format = 32;
ev->data.data32[0] = XCB_CURRENT_TIME;
ev->data.data32[1] = XEMBED_EMBEDDED_NOTIFY;
ev->data.data32[2] = output_for_tray->bar.id;
ev->data.data32[3] = xe_version;
xcb_send_event(xcb_connection,
0,
client,
XCB_EVENT_MASK_NO_EVENT,
(char *)ev);
free(event);
/* Put the client inside the save set. Upon termination (whether
* killed or normal exit does not matter) of i3bar, these clients
* will be correctly reparented to their most closest living
* ancestor. Without this, tray icons might die when i3bar
* exits/crashes. */
xcb_change_save_set(xcb_connection, XCB_SET_MODE_INSERT, client);
trayclient *tc = scalloc(1, sizeof(trayclient));
tc->win = client;
tc->xe_version = xe_version;
tc->mapped = false;
TAILQ_INSERT_TAIL(output_for_tray->trayclients, tc, tailq);
trayclient_update_class(tc);
if (map_it) {
DLOG("Mapping dock client\n");
xcb_map_window(xcb_connection, client);
} else {
DLOG("Not mapping dock client yet\n");
}
/* Trigger an update to copy the statusline text to the appropriate
* position */
configure_trayclients();
draw_bars(false);
}
}
}
/*
* Handles DestroyNotify events by removing the tray client from the data
* structure. According to the XEmbed protocol, this is one way for a tray
* client to finish the protocol. After this event is received, there is no
* further interaction with the tray client.
*
* See: https://standards.freedesktop.org/xembed-spec/xembed-spec-latest.html
*
*/
static void handle_destroy_notify(xcb_destroy_notify_event_t *event) {
DLOG("DestroyNotify for window = %08x, event = %08x\n", event->window, event->event);
i3_output *output;
trayclient *client = trayclient_and_output_from_window(event->window, &output);
if (!client) {
DLOG("WARNING: Could not find corresponding tray window.\n");
return;
}
DLOG("Removing tray client with window ID %08x\n", event->window);
TAILQ_REMOVE(output->trayclients, client, tailq);
free(client->class_class);
free(client->class_instance);
FREE(client);
/* Trigger an update, we now have more space for the statusline */
configure_trayclients();
draw_bars(false);
}
/*
* Handles MapNotify events. These events happen when a tray client shows its
* window. We respond by realigning the tray clients.
*
*/
static void handle_map_notify(xcb_map_notify_event_t *event) {
DLOG("MapNotify for window = %08x, event = %08x\n", event->window, event->event);
trayclient *client = trayclient_from_window(event->window);
if (!client) {
DLOG("WARNING: Could not find corresponding tray window.\n");
return;
}
DLOG("Tray client mapped (window ID %08x). Adjusting tray.\n", event->window);