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gri3-wm/i3bar/src/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) {
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) {
send_block_clicked(event->detail, block->name, block->instance,
event->root_x, event->root_y, relative_x,
event->event_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 = walk->rect.w - walk->statusline_width -
tray_width - logical_px((tray_width > 0) * sb_hoff_px);
if (x >= offset) {
/* 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;
child_handle_button(event, walk, statusline_x);
}
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);
client->mapped = true;
/* Trigger an update, we now have one extra tray client. */
configure_trayclients();
draw_bars(false);
}
/*
* Handles UnmapNotify events. These events happen when a tray client hides its
* window. We respond by realigning the tray clients.
*
*/
static void handle_unmap_notify(xcb_unmap_notify_event_t *event) {
DLOG("UnmapNotify 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 unmapped (window ID %08x). Adjusting tray.\n", event->window);
client->mapped = false;
/* Trigger an update, we now have more space for the statusline */
configure_trayclients();
draw_bars(false);
}
/*
* Handle PropertyNotify messages.
*
*/
static void handle_property_notify(xcb_property_notify_event_t *event) {
DLOG("PropertyNotify\n");
if (event->atom == atoms[_XEMBED_INFO] &&
event->state == XCB_PROPERTY_NEW_VALUE) {
/* _XEMBED_INFO property tells us whether a dock client should be mapped or unmapped. */
DLOG("xembed_info updated\n");
trayclient *client = trayclient_from_window(event->window);
if (!client) {
ELOG("PropertyNotify received for unknown window %08x\n", event->window);
return;
}
xcb_get_property_cookie_t xembedc;
xembedc = xcb_get_property_unchecked(xcb_connection,
0,
client->win,
atoms[_XEMBED_INFO],
XCB_GET_PROPERTY_TYPE_ANY,
0,
2 * 32);
xcb_get_property_reply_t *xembedr = xcb_get_property_reply(xcb_connection,
xembedc,
NULL);
if (xembedr == NULL || xembedr->length == 0) {
DLOG("xembed_info unset\n");
return;
}
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]);
bool map_it = ((xembed[1] & XEMBED_MAPPED) == XEMBED_MAPPED);
DLOG("map state now %d\n", map_it);
if (client->mapped && !map_it) {
/* need to unmap the window */
xcb_unmap_window(xcb_connection, client->win);
} else if (!client->mapped && map_it) {
/* need to map the window */
xcb_map_window(xcb_connection, client->win);
}
free(xembedr);
} else if (event->atom == XCB_ATOM_WM_CLASS) {
trayclient *client = trayclient_from_window(event->window);
if (client) {
trayclient_update_class(client);
}
}
}
/*
* If a tray client attempts to change its size we deny the request and respond
* by telling it its actual size.
*
*/
static void handle_configuration_change(xcb_window_t window) {
trayclient *trayclient;
i3_output *output;
SLIST_FOREACH (output, outputs, slist) {
if (!output->active)
continue;
int clients = 0;
TAILQ_FOREACH_REVERSE (trayclient, output->trayclients, tc_head, tailq) {
if (!trayclient->mapped)
continue;
clients++;
if (trayclient->win != window)
continue;
xcb_rectangle_t rect;
rect.x = output->rect.w - (clients * (icon_size + logical_px(config.tray_padding)));
rect.y = logical_px(config.tray_padding);
rect.width = icon_size;
rect.height = icon_size;
DLOG("This is a tray window. x = %d\n", rect.x);
fake_configure_notify(xcb_connection, rect, window, 0);
return;
}
}
DLOG("WARNING: Could not find corresponding tray window.\n");
}
static void handle_configure_request(xcb_configure_request_event_t *event) {
DLOG("ConfigureRequest for window = %08x\n", event->window);
handle_configuration_change(event->window);
}
static void handle_resize_request(xcb_resize_request_event_t *event) {
DLOG("ResizeRequest for window = %08x\n", event->window);
handle_configuration_change(event->window);
}
/*
* This function is called immediately before the main loop locks. We check for
* events from X11, handle them, then flush our outgoing queue.
*
*/
static void xcb_prep_cb(struct ev_loop *loop, ev_prepare *watcher, int revents) {
xcb_generic_event_t *event;
if (xcb_connection_has_error(xcb_connection)) {
ELOG("X11 connection was closed unexpectedly - maybe your X server terminated / crashed?\n");
#ifdef I3_ASAN_ENABLED
__lsan_do_leak_check();
#endif
exit(1);
}
while ((event = xcb_poll_for_event(xcb_connection)) != NULL) {
if (event->response_type == 0) {
xcb_generic_error_t *error = (xcb_generic_error_t *)event;
DLOG("Received X11 error, sequence 0x%x, error_code = %d\n", error->sequence, error->error_code);
free(event);
continue;
}
int type = (event->response_type & ~0x80);
if (type == xkb_base && xkb_base > -1) {
DLOG("received an xkb event\n");
xcb_xkb_state_notify_event_t *state = (xcb_xkb_state_notify_event_t *)event;
const uint32_t mod = (config.modifier & 0xFFFF);
const bool new_mod_pressed = (mod != 0 && (state->mods & mod) == mod);
if (new_mod_pressed != mod_pressed) {
mod_pressed = new_mod_pressed;
if (state->xkbType == XCB_XKB_STATE_NOTIFY && config.modifier != XCB_NONE) {
if (mod_pressed) {
activated_mode = false;
unhide_bars();
} else if (!activated_mode) {
hide_bars();
}
}
}
free(event);
continue;
}
switch (type) {
case XCB_VISIBILITY_NOTIFY:
/* Visibility change: a bar is [un]obscured by other window */
handle_visibility_notify((xcb_visibility_notify_event_t *)event);
break;
case XCB_EXPOSE:
if (((xcb_expose_event_t *)event)->count == 0) {
/* Expose-events happen, when the window needs to be redrawn */
redraw_bars();
}
break;
case XCB_BUTTON_RELEASE:
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;
case XCB_CLIENT_MESSAGE:
/* Client messages are used for client-to-client communication, for
* example system tray widgets talk to us directly via client messages. */
handle_client_message((xcb_client_message_event_t *)event);
break;
case XCB_DESTROY_NOTIFY:
/* DestroyNotify signifies the end of the XEmbed protocol */
handle_destroy_notify((xcb_destroy_notify_event_t *)event);
break;
case XCB_UNMAP_NOTIFY:
/* UnmapNotify is received when a tray client hides its window. */
handle_unmap_notify((xcb_unmap_notify_event_t *)event);
break;
case XCB_MAP_NOTIFY:
handle_map_notify((xcb_map_notify_event_t *)event);
break;
case XCB_PROPERTY_NOTIFY:
/* PropertyNotify */
handle_property_notify((xcb_property_notify_event_t *)event);
break;
case XCB_CONFIGURE_REQUEST:
/* ConfigureRequest, sent by a tray child */
handle_configure_request((xcb_configure_request_event_t *)event);
break;
case XCB_RESIZE_REQUEST:
/* ResizeRequest sent by a tray child using override_redirect. */
handle_resize_request((xcb_resize_request_event_t *)event);
break;
}
free(event);
}
xcb_flush(xcb_connection);
}
/*
* Dummy callback. We only need this, so that the prepare and check watchers
* are triggered
*
*/
static void xcb_io_cb(struct ev_loop *loop, ev_io *watcher, int revents) {
}
/*
* Early initialization of the connection to X11: Everything which does not
* depend on 'config'.
*
*/
char *init_xcb_early(void) {
/* FIXME: xcb_connect leaks memory */
xcb_connection = xcb_connect(NULL, &screen);
if (xcb_connection_has_error(xcb_connection)) {
ELOG("Cannot open display\n");
exit(EXIT_FAILURE);
}
conn = xcb_connection;
DLOG("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"
root_screen = xcb_aux_get_screen(xcb_connection, screen);
xcb_root = root_screen->root;
depth = root_screen->root_depth;
colormap = root_screen->default_colormap;
visual_type = config.transparency ? xcb_aux_find_visual_by_attrs(root_screen, -1, 32) : NULL;
if (visual_type != NULL) {
depth = xcb_aux_get_depth_of_visual(root_screen, visual_type->visual_id);
colormap = xcb_generate_id(xcb_connection);
xcb_void_cookie_t cm_cookie = xcb_create_colormap_checked(xcb_connection,
XCB_COLORMAP_ALLOC_NONE,
colormap,
xcb_root,
visual_type->visual_id);
if (xcb_request_failed(cm_cookie, "Could not allocate colormap")) {
exit(EXIT_FAILURE);
}
} else {
visual_type = get_visualtype(root_screen);
}
xcb_cursor_context_t *cursor_ctx;
if (xcb_cursor_context_new(conn, root_screen, &cursor_ctx) < 0) {
errx(EXIT_FAILURE, "Cannot allocate xcursor context");
}
cursor = xcb_cursor_load_cursor(cursor_ctx, "left_ptr");
xcb_cursor_context_free(cursor_ctx);
/* The various watchers to communicate with xcb */
xcb_io = smalloc(sizeof(ev_io));
xcb_prep = smalloc(sizeof(ev_prepare));
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_io_start(main_loop, xcb_io);
ev_prepare_start(main_loop, xcb_prep);
/* Now we get the atoms and save them in a nice data structure */
get_atoms();
char *path = root_atom_contents("I3_SOCKET_PATH", xcb_connection, screen);
return path;
}
/*
* Register for xkb keyevents. To grab modifiers without blocking other applications from receiving key events
* involving that modifier, we sadly have to use xkb which is not yet fully supported
* in xcb.
*
*/
static void register_xkb_keyevents(void) {
const xcb_query_extension_reply_t *extreply;
extreply = xcb_get_extension_data(conn, &xcb_xkb_id);
if (!extreply->present) {
ELOG("xkb is not present on this server\n");
exit(EXIT_FAILURE);
}
DLOG("initializing xcb-xkb\n");
xcb_xkb_use_extension(conn, XCB_XKB_MAJOR_VERSION, XCB_XKB_MINOR_VERSION);
xcb_xkb_select_events(conn,
XCB_XKB_ID_USE_CORE_KBD,
XCB_XKB_EVENT_TYPE_STATE_NOTIFY,
0,
XCB_XKB_EVENT_TYPE_STATE_NOTIFY,
0xff,
0xff,
NULL);
xkb_base = extreply->first_event;
}
/*
* Deregister from xkb keyevents.
*
*/
static void deregister_xkb_keyevents(void) {
xcb_xkb_select_events(conn,
XCB_XKB_ID_USE_CORE_KBD,
0,
0,
0,
0xff,
0xff,
NULL);
}
/*
* Initialization which depends on 'config' being usable. Called after the
* configuration has arrived.
*
*/
void init_xcb_late(char *fontname) {
if (fontname == NULL)
fontname = "-misc-fixed-medium-r-normal--13-120-75-75-C-70-iso10646-1";
/* Load the font */
font = load_font(fontname, true);
set_font(&font);
DLOG("Calculated font height: %d\n", font.height);
bar_height = font.height + 2 * logical_px(ws_voff_px);
icon_size = bar_height - 2 * logical_px(config.tray_padding);
if (config.separator_symbol)
separator_symbol_width = predict_text_width(config.separator_symbol);
xcb_flush(xcb_connection);
if (config.hide_on_modifier == M_HIDE)
register_xkb_keyevents();
}
/*
* Inform clients waiting for a new _NET_SYSTEM_TRAY that we took the
* selection.
*
*/
static void send_tray_clientmessage(void) {
uint8_t buffer[32] = {0};
xcb_client_message_event_t *ev = (xcb_client_message_event_t *)buffer;
ev->response_type = XCB_CLIENT_MESSAGE;
ev->window = xcb_root;
ev->type = atoms[MANAGER];
ev->format = 32;
ev->data.data32[0] = XCB_CURRENT_TIME;
ev->data.data32[1] = tray_reply->atom;
ev->data.data32[2] = selwin;
xcb_send_event(xcb_connection,
0,
xcb_root,
0xFFFFFF,
(char *)buffer);
}
/*
* Initializes tray support by requesting the appropriate _NET_SYSTEM_TRAY atom
* for the X11 display we are running on, then acquiring the selection for this
* atom. Afterwards, tray clients will send ClientMessages to our window.
*
*/
static void init_tray(void) {
DLOG("Initializing system tray functionality\n");
/* request the tray manager atom for the X11 display we are running on */
char atomname[strlen("_NET_SYSTEM_TRAY_S") + 11];
snprintf(atomname, strlen("_NET_SYSTEM_TRAY_S") + 11, "_NET_SYSTEM_TRAY_S%d", screen);
xcb_intern_atom_cookie_t tray_cookie;
if (tray_reply == NULL)
tray_cookie = xcb_intern_atom(xcb_connection, 0, strlen(atomname), atomname);
/* tray support: we need a window to own the selection */
selwin = xcb_generate_id(xcb_connection);
uint32_t selmask = XCB_CW_BACK_PIXEL | XCB_CW_BORDER_PIXEL | XCB_CW_OVERRIDE_REDIRECT | XCB_CW_COLORMAP;
uint32_t selval[] = {root_screen->black_pixel, root_screen->black_pixel, 1, colormap};
xcb_create_window(xcb_connection,
depth,
selwin,
xcb_root,
-1, -1,
1, 1,
0,
XCB_WINDOW_CLASS_INPUT_OUTPUT,
visual_type->visual_id,
selmask,
selval);
uint32_t orientation = _NET_SYSTEM_TRAY_ORIENTATION_HORZ;
/* set the atoms */
xcb_change_property(xcb_connection,
XCB_PROP_MODE_REPLACE,
selwin,
atoms[_NET_SYSTEM_TRAY_ORIENTATION],
XCB_ATOM_CARDINAL,
32,
1,
&orientation);
xcb_change_property(xcb_connection,
XCB_PROP_MODE_REPLACE,
selwin,
atoms[_NET_SYSTEM_TRAY_VISUAL],
XCB_ATOM_VISUALID,
32,
1,
&visual_type->visual_id);
init_tray_colors();
if (tray_reply == NULL) {
if (!(tray_reply = xcb_intern_atom_reply(xcb_connection, tray_cookie, NULL))) {
ELOG("Could not get atom %s\n", atomname);
exit(EXIT_FAILURE);
}
}
xcb_set_selection_owner(xcb_connection,
selwin,
tray_reply->atom,
XCB_CURRENT_TIME);
/* Verify that we have the selection */
xcb_get_selection_owner_cookie_t selcookie;
xcb_get_selection_owner_reply_t *selreply;
selcookie = xcb_get_selection_owner(xcb_connection, tray_reply->atom);
if (!(selreply = xcb_get_selection_owner_reply(xcb_connection, selcookie, NULL))) {
ELOG("Could not get selection owner for %s\n", atomname);
exit(EXIT_FAILURE);
}
if (selreply->owner != selwin) {
ELOG("Could not set the %s selection. "
"Maybe another tray is already running?\n",
atomname);
/* NOTE that this error is not fatal. We just can’t provide tray
* functionality */
free(selreply);
return;
}
free(selreply);
send_tray_clientmessage();
}
/*
* We need to set the _NET_SYSTEM_TRAY_COLORS atom on the tray selection window
* to make GTK+ 3 applets with symbolic icons visible. If the colors are unset,
* they assume a light background.
* See also https://bugzilla.gnome.org/show_bug.cgi?id=679591
*
*/
void init_tray_colors(void) {
/* Convert colors.bar_fg (#rrggbb) to 16-bit RGB */
const char *bar_fg = (config.colors.bar_fg ? config.colors.bar_fg : "#FFFFFF");
DLOG("Setting bar_fg = %s as _NET_SYSTEM_TRAY_COLORS\n", bar_fg);
char strgroups[3][3] = {{bar_fg[1], bar_fg[2], '\0'},
{bar_fg[3], bar_fg[4], '\0'},
{bar_fg[5], bar_fg[6], '\0'}};
const uint8_t r = strtol(strgroups[0], NULL, 16);
const uint8_t g = strtol(strgroups[1], NULL, 16);
const uint8_t b = strtol(strgroups[2], NULL, 16);
const uint16_t r16 = ((uint16_t)r << 8) | r;
const uint16_t g16 = ((uint16_t)g << 8) | g;
const uint16_t b16 = ((uint16_t)b << 8) | b;
const uint32_t tray_colors[12] = {
r16, g16, b16, /* foreground color */
r16, g16, b16, /* error color */
r16, g16, b16, /* warning color */
r16, g16, b16, /* success color */
};
xcb_change_property(xcb_connection,
XCB_PROP_MODE_REPLACE,
selwin,
atoms[_NET_SYSTEM_TRAY_COLORS],
XCB_ATOM_CARDINAL,
32,
12,
tray_colors);
}
/*
* Cleanup the xcb stuff.
* Called once, before the program terminates.
*
*/
void clean_xcb(void) {
free_outputs();
free_font();
xcb_free_cursor(xcb_connection, cursor);
xcb_flush(xcb_connection);
xcb_aux_sync(xcb_connection);
xcb_disconnect(xcb_connection);
ev_prepare_stop(main_loop, xcb_prep);
ev_io_stop(main_loop, xcb_io);
FREE(xcb_prep);
FREE(xcb_io);
}
/*
* Get the earlier requested atoms and save them in the prepared data structure
*
*/
void get_atoms(void) {
xcb_intern_atom_reply_t *reply;
#define ATOM_DO(name) \
reply = xcb_intern_atom_reply(xcb_connection, atom_cookies[name], NULL); \
if (reply == NULL) { \
ELOG("Could not get atom %s\n", #name); \
exit(EXIT_FAILURE); \
} \
atoms[name] = reply->atom; \
free(reply);
#include "xcb_atoms.def"
DLOG("Got atoms\n");
}
/*
* Reparents all tray clients of the specified output to the root window. This
* is either used when shutting down, when an output appears (xrandr --output
* VGA1 --off) or when the primary output changes.
*
* Applications using the tray will start the protocol from the beginning again
* afterwards.
*
*/
void kick_tray_clients(i3_output *output) {
if (TAILQ_EMPTY(output->trayclients))
return;
trayclient *trayclient;
while (!TAILQ_EMPTY(output->trayclients)) {
trayclient = TAILQ_FIRST(output->trayclients);
/* Unmap, then reparent (to root) the tray client windows */
xcb_unmap_window(xcb_connection, trayclient->win);
xcb_reparent_window(xcb_connection,
trayclient->win,
xcb_root,
0,
0);
free(trayclient->class_class);
free(trayclient->class_instance);
/* We remove the trayclient right here. We might receive an UnmapNotify
* event afterwards, but better safe than sorry. */
TAILQ_REMOVE(output->trayclients, trayclient, tailq);
FREE(trayclient);
}
/* Fake a DestroyNotify so that Qt re-adds tray icons.
* We cannot actually destroy the window because then Qt will not restore
* its event mask on the new window. */
uint8_t buffer[32] = {0};
xcb_destroy_notify_event_t *event = (xcb_destroy_notify_event_t *)buffer;
event->response_type = XCB_DESTROY_NOTIFY;
event->event = selwin;
event->window = selwin;
xcb_send_event(conn, false, selwin, XCB_EVENT_MASK_STRUCTURE_NOTIFY, (char *)event);
send_tray_clientmessage();
}
/*
* Destroy the bar of the specified output
*
*/
void destroy_window(i3_output *output) {
if (output == NULL) {
return;
}
if (output->bar.id == XCB_NONE) {
return;
}
kick_tray_clients(output);
xcb_destroy_window(xcb_connection, output->bar.id);
output->bar.id = XCB_NONE;
}
/* Strut partial tells i3 where to reserve space for i3bar. This is determined
* by the `position` bar config directive. */
static xcb_void_cookie_t config_strut_partial(i3_output *output) {
/* A local struct to save the strut_partial property */
struct {
uint32_t left;
uint32_t right;
uint32_t top;
uint32_t bottom;
uint32_t left_start_y;
uint32_t left_end_y;
uint32_t right_start_y;
uint32_t right_end_y;
uint32_t top_start_x;
uint32_t top_end_x;
uint32_t bottom_start_x;
uint32_t bottom_end_x;
} __attribute__((__packed__)) strut_partial;
memset(&strut_partial, 0, sizeof(strut_partial));
switch (config.position) {
case POS_NONE:
break;
case POS_TOP:
strut_partial.top = bar_height;
strut_partial.top_start_x = output->rect.x;
strut_partial.top_end_x = output->rect.x + output->rect.w;
break;
case POS_BOT:
strut_partial.bottom = bar_height;
strut_partial.bottom_start_x = output->rect.x;
strut_partial.bottom_end_x = output->rect.x + output->rect.w;
break;
}
return xcb_change_property(xcb_connection,
XCB_PROP_MODE_REPLACE,
output->bar.id,
atoms[_NET_WM_STRUT_PARTIAL],
XCB_ATOM_CARDINAL,
32,
12,
&strut_partial);
}
/*
* Returns the output which should hold the tray, if one exists.
*
* An output is returned in these scenarios:
* 1. A specific output was listed in tray_outputs which is also in the list
* of outputs managed by this bar.
* 2. No tray_output directive was specified. In this case, we use the first
* available output.
* 3. 'tray_output primary' was specified. In this case we use the primary
* output.
*
* Three scenarios in which we specifically don't want to use a tray:
* 1. 'tray_output none' was specified.
* 2. A specific output was listed as a tray_output, but is not one of the
* outputs managed by this bar. For example, consider tray_outputs == [VGA-1],
* but outputs == [HDMI-1].
* 3. 'tray_output primary' was specified and no output in the list is
* primary.
*/
static i3_output *get_tray_output(void) {
i3_output *output = NULL;
if (TAILQ_EMPTY(&(config.tray_outputs))) {
/* No tray_output specified, use first active output. */
SLIST_FOREACH (output, outputs, slist) {
if (output->active) {
return output;
}
}
return NULL;
} else if (strcasecmp(TAILQ_FIRST(&(config.tray_outputs))->output, "none") == 0) {
/* Check for "tray_output none" */
return NULL;
}
/* If one or more tray_output assignments were specified, we ensure that at
* least one of them is actually an output managed by this instance. */
tray_output_t *tray_output;
TAILQ_FOREACH (tray_output, &(config.tray_outputs), tray_outputs) {
SLIST_FOREACH (output, outputs, slist) {
if (output->active &&
(strcasecmp(output->name, tray_output->output) == 0 ||
(strcasecmp(tray_output->output, "primary") == 0 && output->primary))) {
return output;
}
}
}
return NULL;
}
/*
* Reconfigure all bars and create new bars for recently activated outputs
*
*/
void reconfig_windows(bool redraw_bars) {
uint32_t mask;
uint32_t values[6];
i3_output *walk;
SLIST_FOREACH (walk, outputs, slist) {
if (!walk->active) {
/* If an output is not active, we destroy its bar */
/* FIXME: Maybe we rather want to unmap? */
DLOG("Destroying window for output %s\n", walk->name);
destroy_window(walk);
continue;
}
if (walk->bar.id == XCB_NONE) {
DLOG("Creating window for output %s\n", walk->name);
xcb_window_t bar_id = xcb_generate_id(xcb_connection);
xcb_pixmap_t buffer_id = xcb_generate_id(xcb_connection);
xcb_pixmap_t statusline_buffer_id = xcb_generate_id(xcb_connection);
mask = XCB_CW_BACK_PIXEL | XCB_CW_BORDER_PIXEL | XCB_CW_OVERRIDE_REDIRECT | XCB_CW_EVENT_MASK | XCB_CW_COLORMAP | XCB_CW_CURSOR;
values[0] = colors.bar_bg.colorpixel;
values[1] = root_screen->black_pixel;
/* If hide_on_modifier is set to hide or invisible mode, i3 is not supposed to manage our bar windows */
values[2] = (config.hide_on_modifier == M_DOCK ? 0 : 1);
/* We enable the following EventMask fields:
* EXPOSURE, to get expose events (we have to re-draw then)
* SUBSTRUCTURE_REDIRECT, to get ConfigureRequests when the tray
* child windows use ConfigureWindow
* BUTTON_PRESS, to handle clicks on the workspace buttons
* */
values[3] = XCB_EVENT_MASK_EXPOSURE |
XCB_EVENT_MASK_SUBSTRUCTURE_REDIRECT |
XCB_EVENT_MASK_BUTTON_PRESS |
XCB_EVENT_MASK_BUTTON_RELEASE;
if (config.hide_on_modifier == M_DOCK) {
/* If the bar is normally visible, catch visibility change events to suspend
* the status process when the bar is obscured by full-screened windows. */
values[3] |= XCB_EVENT_MASK_VISIBILITY_CHANGE;
walk->visible = true;
}
values[4] = colormap;
values[5] = cursor;
xcb_void_cookie_t win_cookie = xcb_create_window_checked(xcb_connection,
depth,
bar_id,
xcb_root,
walk->rect.x, walk->rect.y + walk->rect.h - bar_height,
walk->rect.w, bar_height,
0,
XCB_WINDOW_CLASS_INPUT_OUTPUT,
visual_type->visual_id,
mask,
values);
/* The double-buffer we use to render stuff off-screen */
xcb_void_cookie_t pm_cookie = xcb_create_pixmap_checked(xcb_connection,
depth,
buffer_id,
bar_id,
walk->rect.w,
bar_height);
/* The double-buffer we use to render the statusline before copying to buffer */
xcb_void_cookie_t slpm_cookie = xcb_create_pixmap_checked(xcb_connection,
depth,
statusline_buffer_id,
bar_id,
walk->rect.w,
bar_height);
/* Set the WM_CLASS and WM_NAME (we don't need UTF-8) atoms */
char *class;
int len = sasprintf(&class, "%s%ci3bar%c", config.bar_id, 0, 0);
xcb_void_cookie_t class_cookie;
class_cookie = xcb_change_property(xcb_connection,
XCB_PROP_MODE_REPLACE,
bar_id,
XCB_ATOM_WM_CLASS,
XCB_ATOM_STRING,
8,
len,
class);
char *name;
sasprintf(&name, "i3bar for output %s", walk->name);
xcb_void_cookie_t name_cookie;
name_cookie = xcb_change_property(xcb_connection,
XCB_PROP_MODE_REPLACE,
bar_id,
XCB_ATOM_WM_NAME,
XCB_ATOM_STRING,
8,
strlen(name),
name);
free(name);
/* We want dock windows (for now). When override_redirect is set, i3 is ignoring
* this one */
xcb_void_cookie_t dock_cookie = xcb_change_property(xcb_connection,
XCB_PROP_MODE_REPLACE,
bar_id,
atoms[_NET_WM_WINDOW_TYPE],
XCB_ATOM_ATOM,
32,
1,
(unsigned char *)&atoms[_NET_WM_WINDOW_TYPE_DOCK]);
draw_util_surface_init(xcb_connection, &walk->bar, bar_id, NULL, walk->rect.w, bar_height);
draw_util_surface_init(xcb_connection, &walk->buffer, buffer_id, NULL, walk->rect.w, bar_height);
draw_util_surface_init(xcb_connection, &walk->statusline_buffer, statusline_buffer_id, NULL, walk->rect.w, bar_height);
xcb_void_cookie_t strut_cookie = config_strut_partial(walk);
/* We finally map the bar (display it on screen), unless the modifier-switch is on */
xcb_void_cookie_t map_cookie;
if (config.hide_on_modifier == M_DOCK) {
map_cookie = xcb_map_window_checked(xcb_connection, bar_id);
}
if (xcb_request_failed(win_cookie, "Could not create window") ||
xcb_request_failed(pm_cookie, "Could not create pixmap") ||
xcb_request_failed(slpm_cookie, "Could not create statusline pixmap") ||
xcb_request_failed(dock_cookie, "Could not set dock mode") ||
xcb_request_failed(class_cookie, "Could not set WM_CLASS") ||
xcb_request_failed(name_cookie, "Could not set WM_NAME") ||
xcb_request_failed(strut_cookie, "Could not set strut") ||
((config.hide_on_modifier == M_DOCK) && xcb_request_failed(map_cookie, "Could not map window"))) {
exit(EXIT_FAILURE);
}
} 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 |
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 strut partial property for output %s\n", walk->name);
xcb_void_cookie_t strut_cookie = config_strut_partial(walk);
DLOG("Destroying buffer for output %s\n", walk->name);
xcb_free_pixmap(xcb_connection, walk->buffer.id);
DLOG("Destroying statusline buffer for output %s\n", walk->name);
xcb_free_pixmap(xcb_connection, walk->statusline_buffer.id);
DLOG("Reconfiguring window for output %s to %d,%d\n", walk->name, values[0], values[1]);
xcb_void_cookie_t cfg_cookie = xcb_configure_window_checked(xcb_connection,
walk->bar.id,
mask,
values);
mask = XCB_CW_OVERRIDE_REDIRECT;
values[0] = (config.hide_on_modifier == M_DOCK ? 0 : 1);
DLOG("Changing window attribute override_redirect for output %s to %d\n", walk->name, values[0]);
xcb_void_cookie_t chg_cookie = xcb_change_window_attributes(xcb_connection,
walk->bar.id,
mask,
values);
DLOG("Recreating buffer for output %s\n", walk->name);
xcb_void_cookie_t pm_cookie = xcb_create_pixmap_checked(xcb_connection,
depth,
walk->buffer.id,
walk->bar.id,
walk->rect.w,
bar_height);
DLOG("Recreating statusline buffer for output %s\n", walk->name);
xcb_void_cookie_t slpm_cookie = xcb_create_pixmap_checked(xcb_connection,
depth,
walk->statusline_buffer.id,
walk->bar.id,
walk->rect.w,
bar_height);
draw_util_surface_free(xcb_connection, &(walk->bar));
draw_util_surface_free(xcb_connection, &(walk->buffer));
draw_util_surface_free(xcb_connection, &(walk->statusline_buffer));
draw_util_surface_init(xcb_connection, &(walk->bar), walk->bar.id, NULL, walk->rect.w, bar_height);
draw_util_surface_init(xcb_connection, &(walk->buffer), walk->buffer.id, NULL, walk->rect.w, bar_height);
draw_util_surface_init(xcb_connection, &(walk->statusline_buffer), walk->statusline_buffer.id, NULL, walk->rect.w, bar_height);
xcb_void_cookie_t map_cookie, umap_cookie;
if (redraw_bars) {
/* Unmap the window, and draw it again when in dock mode */
umap_cookie = xcb_unmap_window_checked(xcb_connection, walk->bar.id);
if (config.hide_on_modifier == M_DOCK) {
cont_child();
map_cookie = xcb_map_window_checked(xcb_connection, walk->bar.id);
} else {
stop_child();
}
if (config.hide_on_modifier == M_HIDE) {
/* Switching to hide mode, register for keyevents */
register_xkb_keyevents();
} else {
/* Switching to dock/invisible mode, deregister from keyevents */
deregister_xkb_keyevents();
}
}
if (xcb_request_failed(cfg_cookie, "Could not reconfigure window") ||
xcb_request_failed(chg_cookie, "Could not change window") ||
xcb_request_failed(pm_cookie, "Could not create pixmap") ||
xcb_request_failed(slpm_cookie, "Could not create statusline pixmap") ||
xcb_request_failed(strut_cookie, "Could not set strut") ||
(redraw_bars && (xcb_request_failed(umap_cookie, "Could not unmap window") ||
(config.hide_on_modifier == M_DOCK && xcb_request_failed(map_cookie, "Could not map window"))))) {
exit(EXIT_FAILURE);
}
}
}
/* Finally, check if we want to initialize the tray or destroy the selection
* window. The result of get_tray_output() is cached. */
output_for_tray = get_tray_output();
if (output_for_tray) {
if (selwin == XCB_NONE) {
init_tray();
}
} else if (selwin != XCB_NONE) {
DLOG("Destroying tray selection window\n");
xcb_destroy_window(xcb_connection, selwin);
selwin = XCB_NONE;
}
}
/*
* Draw the button for a workspace or the current binding mode indicator.
*
*/
static void draw_button(surface_t *surface, color_t fg_color, color_t bg_color, color_t border_color,
int x, int width, int text_width, i3String *text) {
int height = font.height + 2 * logical_px(ws_voff_px) - 2 * logical_px(1);
/* Draw the border of the button. */
draw_util_rectangle(surface, border_color, x, logical_px(1), width, height);
/* Draw the inside of the button. */
draw_util_rectangle(surface, bg_color, x + logical_px(1), 2 * logical_px(1),
width - 2 * logical_px(1), height - 2 * logical_px(1));
draw_util_text(text, surface, fg_color, bg_color, x + (width - text_width) / 2,
logical_px(ws_voff_px), text_width);
}
/*
* Render the bars, with buttons and statusline
*
*/
void draw_bars(bool unhide) {
DLOG("Drawing bars...\n");
uint32_t full_statusline_width = predict_statusline_length(false);
uint32_t short_statusline_width = predict_statusline_length(true);
i3_output *outputs_walk;
SLIST_FOREACH (outputs_walk, outputs, slist) {
int workspace_width = 0;
if (!outputs_walk->active) {
DLOG("Output %s inactive, skipping...\n", outputs_walk->name);
continue;
}
if (outputs_walk->bar.id == XCB_NONE) {
/* Oh shit, an active output without an own bar. Create it now! */
reconfig_windows(false);
}
bool use_focus_colors = output_has_focus(outputs_walk);
/* First things first: clear the backbuffer */
draw_util_clear_surface(&(outputs_walk->buffer), (use_focus_colors ? colors.focus_bar_bg : colors.bar_bg));
if (!config.disable_ws) {
i3_ws *ws_walk;
TAILQ_FOREACH (ws_walk, outputs_walk->workspaces, tailq) {
DLOG("Drawing button for WS %s at x = %d, len = %d\n",
i3string_as_utf8(ws_walk->name), workspace_width, ws_walk->name_width);
color_t fg_color = colors.inactive_ws_fg;
color_t bg_color = colors.inactive_ws_bg;
color_t border_color = colors.inactive_ws_border;
if (ws_walk->visible) {
if (!ws_walk->focused) {
fg_color = colors.active_ws_fg;
bg_color = colors.active_ws_bg;
border_color = colors.active_ws_border;
} else {
fg_color = colors.focus_ws_fg;
bg_color = colors.focus_ws_bg;
border_color = colors.focus_ws_border;
}
}
if (ws_walk->urgent) {
DLOG("WS %s is urgent!\n", i3string_as_utf8(ws_walk->name));
fg_color = colors.urgent_ws_fg;
bg_color = colors.urgent_ws_bg;
border_color = colors.urgent_ws_border;
unhide = true;
}
int w = predict_button_width(ws_walk->name_width);
draw_button(&(outputs_walk->buffer), fg_color, bg_color, border_color,
workspace_width, w, ws_walk->name_width, ws_walk->name);
workspace_width += w;
if (TAILQ_NEXT(ws_walk, tailq) != NULL)
workspace_width += logical_px(ws_spacing_px);
}
}
if (binding.name && !config.disable_binding_mode_indicator) {
workspace_width += logical_px(ws_spacing_px);
int w = predict_button_width(binding.name_width);
draw_button(&(outputs_walk->buffer), colors.binding_mode_fg, colors.binding_mode_bg,
colors.binding_mode_border, workspace_width, w, binding.name_width, binding.name);
unhide = true;
workspace_width += w;
}
if (!TAILQ_EMPTY(&statusline_head)) {
DLOG("Printing statusline!\n");
int tray_width = get_tray_width(outputs_walk->trayclients);
uint32_t hoff = logical_px(((workspace_width > 0) + (tray_width > 0)) * sb_hoff_px);
uint32_t max_statusline_width = outputs_walk->rect.w - workspace_width - tray_width - hoff;
uint32_t clip_left = 0;
uint32_t statusline_width = full_statusline_width;
bool use_short_text = false;
if (statusline_width > max_statusline_width) {
statusline_width = short_statusline_width;
use_short_text = true;
if (statusline_width > max_statusline_width) {
clip_left = statusline_width - max_statusline_width;
}
}
int16_t visible_statusline_width = MIN(statusline_width, max_statusline_width);
int x_dest = outputs_walk->rect.w - tray_width - logical_px((tray_width > 0) * sb_hoff_px) - visible_statusline_width;
draw_statusline(outputs_walk, clip_left, use_focus_colors, use_short_text);
draw_util_copy_surface(&outputs_walk->statusline_buffer, &outputs_walk->buffer, 0, 0,
x_dest, 0, visible_statusline_width, (int16_t)bar_height);
outputs_walk->statusline_width = statusline_width;
outputs_walk->statusline_short_text = use_short_text;
}
}
/* Assure the bar is hidden/unhidden according to the specified hidden_state and mode */
if (mod_pressed ||
config.hidden_state == S_SHOW ||
unhide) {
unhide_bars();
} else if (config.hide_on_modifier == M_HIDE) {
hide_bars();
}
redraw_bars();
}
/*
* Redraw the bars, i.e. simply copy the buffer to the barwindow
*
*/
void redraw_bars(void) {
i3_output *outputs_walk;
SLIST_FOREACH (outputs_walk, outputs, slist) {
if (!outputs_walk->active) {
continue;
}
draw_util_copy_surface(&(outputs_walk->buffer), &(outputs_walk->bar), 0, 0,
0, 0, outputs_walk->rect.w, outputs_walk->rect.h);
xcb_flush(xcb_connection);
}
}
/*
* Set the current binding mode
*
*/
void set_current_mode(struct mode *current) {
I3STRING_FREE(binding.name);
binding = *current;
activated_mode = binding.name != NULL;
}
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