click_events as documented at https://i3wm.org/docs/i3bar-protocol.html

3 files changed, 127 insertions, 10 deletions

diff --git a/swaybar/bar.c b/swaybar/bar.c
index 5e87eac9..89f7c8c1 100644
--- a/swaybar/bar.c
+++ b/swaybar/bar.c
@@ -7,6 +7,7 @@
 #include <sys/wait.h>
 #include <signal.h>
 #include <poll.h>
+#include <linux/input-event-codes.h>
 #ifdef ENABLE_TRAY
 #include <dbus/dbus.h>
 #include "swaybar/tray/sni_watcher.h"
@@ -31,16 +32,30 @@ static void bar_init(struct bar *bar) {
 
 static void spawn_status_cmd_proc(struct bar *bar) {
         if (bar->config->status_command) {
-                int pipefd[2];
-                if (pipe(pipefd) != 0) {
-                        sway_log(L_ERROR, "Unable to create pipe for status_command fork");
+                int pipe_read_fd[2];
+                int pipe_write_fd[2];
+
+                if (pipe(pipe_read_fd) != 0) {
+                        sway_log(L_ERROR, "Unable to create pipes for status_command fork");
+                        return;
+                }
+                if (pipe(pipe_write_fd) != 0) {
+                        sway_log(L_ERROR, "Unable to create pipe for status_command fork (write)");
+                        close(pipe_read_fd[0]);
+                        close(pipe_read_fd[1]);
                         return;
                 }
+
                 bar->status_command_pid = fork();
                 if (bar->status_command_pid == 0) {
-                        close(pipefd[0]);
-                        dup2(pipefd[1], STDOUT_FILENO);
-                        close(pipefd[1]);
+                        close(pipe_read_fd[0]);
+                        dup2(pipe_read_fd[1], STDOUT_FILENO);
+                        close(pipe_read_fd[1]);
+                        
+                        dup2(pipe_write_fd[0], STDIN_FILENO);
+                        close(pipe_write_fd[0]);
+                        close(pipe_write_fd[1]);
+                        
                         char *const cmd[] = {
                                 "sh",
                                 "-c",
@@ -51,9 +66,13 @@ static void spawn_status_cmd_proc(struct bar *bar) {
                         return;
                 }
 
-                close(pipefd[1]);
-                bar->status_read_fd = pipefd[0];
+                close(pipe_read_fd[1]);
+                bar->status_read_fd = pipe_read_fd[0];
                 fcntl(bar->status_read_fd, F_SETFL, O_NONBLOCK);
+                
+                close(pipe_write_fd[0]);
+                bar->status_write_fd = pipe_write_fd[1];
+                fcntl(bar->status_write_fd, F_SETFL, O_NONBLOCK);
         }
 }
 
@@ -103,9 +122,22 @@ static void mouse_button_notify(struct window *window, int x, int y,
                 }
         }
 
+        switch (button) {
+                case BTN_LEFT:
+                        status_line_mouse_event(&swaybar, x, y, 1);
+                        break;
+                case BTN_MIDDLE:
+                        status_line_mouse_event(&swaybar, x, y, 2);
+                        break;
+                case BTN_RIGHT:
+                        status_line_mouse_event(&swaybar, x, y, 3);
+                        break;
+        }
+
 #ifdef ENABLE_TRAY
         tray_mouse_event(clicked_output, x, y, button, state_w);
 #endif
+
 }
 
 static void mouse_scroll_notify(struct window *window, enum scroll_direction direction) {
@@ -318,6 +350,10 @@ void bar_teardown(struct bar *bar) {
                 close(bar->status_read_fd);
         }
 
+        if (bar->status_write_fd) {
+                close(bar->status_write_fd);
+        }
+
         if (bar->ipc_socketfd) {
                 close(bar->ipc_socketfd);
         }
diff --git a/swaybar/render.c b/swaybar/render.c
index 6ec47e79..232d254b 100644
--- a/swaybar/render.c
+++ b/swaybar/render.c
@@ -94,6 +94,9 @@ static void render_block(struct window *window, struct config *config, struct st
 
         double pos = *x;
 
+        block->x = (int) pos;
+        block->width = (int) block_width;
+
         // render background
         if (block->background != 0x0) {
                 cairo_set_source_u32(window->cairo, block->background);
diff --git a/swaybar/status_line.c b/swaybar/status_line.c
index 83e8ce2c..f0888273 100644
--- a/swaybar/status_line.c
+++ b/swaybar/status_line.c
@@ -27,6 +27,8 @@ struct {
 static char line[1024];
 static char line_rest[1024];
 
+static char event_buff[1024];
+
 static void free_status_block(void *item) {
         if (!item) {
                 return;
@@ -391,6 +393,67 @@ static int i3json_handle_fd(struct bar *bar) {
         return i3json_parse(bar);
 }
 
+bool status_line_mouse_event(struct bar *bar, int x, int y, uint32_t button) {
+        sway_log(L_DEBUG, "status_line_mouse_event.");
+        if (!bar->status->click_events) {
+                sway_log(L_DEBUG, "click_events are not enabled.");
+                return false;
+        }
+
+        if (bar->status->protocol == I3BAR) {
+                sway_log(L_DEBUG, "Sending click event.");
+
+                // find clicked block
+                struct status_block *clicked_block = NULL;
+                struct status_block *current_block = NULL;
+                int num_blocks = bar->status->block_line->length;
+
+                if (num_blocks == 0) {
+                        return false;
+                }
+                else {
+                        current_block = bar->status->block_line->items[0];
+                        if (x < current_block->x) {
+                                return false;
+                        }
+                }
+
+                for (int i = 0; i < num_blocks; i++) {
+                        current_block = bar->status->block_line->items[i];
+                        if (x < (current_block->x + current_block->width)) {
+                                clicked_block = current_block;
+                                break;
+                        }
+                }
+
+                if (!clicked_block || !clicked_block->name) {
+                        return false;
+                }
+
+                // event example {"name":"capture","instance":"label","button":1,"x":3431,"y":18}
+        
+                struct json_object *event_json = json_object_new_object();
+                json_object_object_add(event_json, "name", json_object_new_string(clicked_block->name));
+                if (clicked_block->instance) {
+                        json_object_object_add(event_json, "instance", json_object_new_string(clicked_block->instance));
+                }
+                json_object_object_add(event_json, "button", json_object_new_int(button));
+                json_object_object_add(event_json, "x", json_object_new_int(x));
+                json_object_object_add(event_json, "y", json_object_new_int(y));
+
+                int len = snprintf(event_buff, sizeof(event_buff), "%s,\n", json_object_to_json_string(event_json));
+
+                json_object_put(event_json);
+
+                if (len <= (int)sizeof(event_buff)) { // if not truncated
+                        write(bar->status_write_fd, event_buff, len);
+                        return true;
+                }
+        }
+
+        return false;
+}
+
 bool handle_status_line(struct bar *bar) {
         bool dirty = false;
 
@@ -418,15 +481,29 @@ bool handle_status_line(struct bar *bar) {
                 if (line[0] == '{') {
                         // detect i3bar json protocol
                         json_object *proto = json_tokener_parse(line);
-                        json_object *version;
                         if (proto) {
+
+                                json_object *version;
                                 if (json_object_object_get_ex(proto, "version", &version)
                                                         && json_object_get_int(version) == 1
                                 ) {
                                         sway_log(L_DEBUG, "Switched to i3bar protocol.");
                                         bar->status->protocol = I3BAR;
-                                        i3json_handle_data(bar, line_rest);
                                 }
+
+                                json_object *click_events;
+                                if (json_object_object_get_ex(proto, "click_events", &click_events)
+                                                        && json_object_get_boolean(click_events)
+                                ) {
+                                        sway_log(L_DEBUG, "Enabling click events.");
+                                        bar->status->click_events = true;
+
+                                        const char *events_array = "[\n";
+                                        write(bar->status_write_fd, events_array, strlen(events_array));
+                                }
+
+                                i3json_handle_data(bar, line_rest);
+
                                 json_object_put(proto);
                         }
                 }
@@ -441,6 +518,7 @@ struct status_line *init_status_line() {
         line->block_line = create_list();
         line->text_line = NULL;
         line->protocol = UNDEF;
+        line->click_events = false;
 
         return line;
 }