Include workspace con in workspace event

Send the affected workspace in the "current" property for each workspace
event for any type of workspace event that affects a particular
workspace.

fixes #1411

src/commands.c

@@ -944,7 +944,7 @@ void cmd_append_layout(I3_CMD, char *path) {
     restore_open_placeholder_windows(parent);
 
     if (content == JSON_CONTENT_WORKSPACE)
-        ipc_send_event("workspace", I3_IPC_EVENT_WORKSPACE, "{\"change\":\"restored\"}");
+        ipc_send_workspace_event("restored", parent, NULL);
 
     cmd_output->needs_tree_render = true;
 }
@@ -1313,7 +1313,7 @@ void cmd_move_workspace_to_output(I3_CMD, char *name) {
                 create_workspace_on_output(current_output, ws->parent);
 
             /* notify the IPC listeners */
-            ipc_send_event("workspace", I3_IPC_EVENT_WORKSPACE, "{\"change\":\"init\"}");
+            ipc_send_workspace_event("init", ws, NULL);
         }
         DLOG("Detaching\n");
 
@@ -1334,7 +1334,7 @@ void cmd_move_workspace_to_output(I3_CMD, char *name) {
         TAILQ_FOREACH(floating_con, &(ws->floating_head), floating_windows)
         floating_fix_coordinates(floating_con, &(old_content->rect), &(content->rect));
 
-        ipc_send_event("workspace", I3_IPC_EVENT_WORKSPACE, "{\"change\":\"move\"}");
+        ipc_send_workspace_event("move", ws, NULL);
         if (workspace_was_visible) {
             /* Focus the moved workspace on the destination output. */
             workspace_show(ws);
@@ -1761,7 +1761,7 @@ void cmd_reload(I3_CMD) {
     load_configuration(conn, NULL, true);
     x_set_i3_atoms();
     /* Send an IPC event just in case the ws names have changed */
-    ipc_send_event("workspace", I3_IPC_EVENT_WORKSPACE, "{\"change\":\"reload\"}");
+    ipc_send_workspace_event("reload", NULL, NULL);
     /* Send an update event for the barconfig just in case it has changed */
     update_barconfig();
 
@@ -2040,7 +2040,7 @@ void cmd_rename_workspace(I3_CMD, char *old_name, char *new_name) {
     cmd_output->needs_tree_render = true;
     ysuccess(true);
 
-    ipc_send_event("workspace", I3_IPC_EVENT_WORKSPACE, "{\"change\":\"rename\"}");
+    ipc_send_workspace_event("rename", workspace, NULL);
     ewmh_update_desktop_names();
     ewmh_update_desktop_viewport();
     ewmh_update_current_desktop();

src/con.c

@@ -12,6 +12,7 @@
  *
  */
 #include "all.h"
+#include "yajl_utils.h"
 
 static void con_on_remove_child(Con *con);
 
@@ -1435,8 +1436,15 @@ static void con_on_remove_child(Con *con) {
     if (con->type == CT_WORKSPACE) {
         if (TAILQ_EMPTY(&(con->focus_head)) && !workspace_is_visible(con)) {
             LOG("Closing old workspace (%p / %s), it is empty\n", con, con->name);
+            yajl_gen gen = ipc_marshal_workspace_event("empty", con, NULL);
             tree_close(con, DONT_KILL_WINDOW, false, false);
-            ipc_send_event("workspace", I3_IPC_EVENT_WORKSPACE, "{\"change\":\"empty\"}");
+
+            const unsigned char *payload;
+            ylength length;
+            y(get_buf, &payload, &length);
+            ipc_send_event("workspace", I3_IPC_EVENT_WORKSPACE, (const char *)payload);
+
+            y(free);
         }
         return;
     }

src/ipc.c

@@ -1120,21 +1120,23 @@ int ipc_create_socket(const char *filename) {
 }
 
 /*
- * For the workspace "focus" event we send, along the usual "change" field,
- * also the current and previous workspace, in "current" and "old"
- * respectively.
+ * Generates a json workspace event. Returns a dynamically allocated yajl
+ * generator. Free with yajl_gen_free().
  */
-void ipc_send_workspace_focus_event(Con *current, Con *old) {
+yajl_gen ipc_marshal_workspace_event(const char *change, Con *current, Con *old) {
     setlocale(LC_NUMERIC, "C");
     yajl_gen gen = ygenalloc();
 
     y(map_open);
 
     ystr("change");
-    ystr("focus");
+    ystr(change);
 
     ystr("current");
-    dump_node(gen, current, false);
+    if (current == NULL)
+        y(null);
+    else
+        dump_node(gen, current, false);
 
     ystr("old");
     if (old == NULL)
@@ -1144,13 +1146,26 @@ void ipc_send_workspace_focus_event(Con *current, Con *old) {
 
     y(map_close);
 
+    setlocale(LC_NUMERIC, "");
+
+    return gen;
+}
+
+/*
+ * For the workspace events we send, along with the usual "change" field, also
+ * the workspace container in "current". For focus events, we send the
+ * previously focused workspace in "old".
+ */
+void ipc_send_workspace_event(const char *change, Con *current, Con *old) {
+    yajl_gen gen = ipc_marshal_workspace_event(change, current, old);
+
     const unsigned char *payload;
     ylength length;
     y(get_buf, &payload, &length);
 
     ipc_send_event("workspace", I3_IPC_EVENT_WORKSPACE, (const char *)payload);
+
     y(free);
-    setlocale(LC_NUMERIC, "");
 }
 
 /**

src/move.c

@@ -128,7 +128,7 @@ static void move_to_output_directed(Con *con, direction_t direction) {
 
     tree_flatten(croot);
 
-    ipc_send_workspace_focus_event(ws, old_ws);
+    ipc_send_workspace_event("focus", ws, old_ws);
 }
 
 /*

src/workspace.c

@@ -11,6 +11,7 @@
  *
  */
 #include "all.h"
+#include "yajl_utils.h"
 
 /* Stores a copy of the name of the last used workspace for the workspace
  * back-and-forth switching. */
@@ -91,7 +92,7 @@ Con *workspace_get(const char *num, bool *created) {
 
         con_attach(workspace, content, false);
 
-        ipc_send_event("workspace", I3_IPC_EVENT_WORKSPACE, "{\"change\":\"init\"}");
+        ipc_send_workspace_event("init", workspace, NULL);
         ewmh_update_number_of_desktops();
         ewmh_update_desktop_names();
         ewmh_update_desktop_viewport();
@@ -409,7 +410,7 @@ static void _workspace_show(Con *workspace) {
     } else
         con_focus(next);
 
-    ipc_send_workspace_focus_event(workspace, current);
+    ipc_send_workspace_event("focus", workspace, current);
 
     DLOG("old = %p / %s\n", old, (old ? old->name : "(null)"));
     /* Close old workspace if necessary. This must be done *after* doing
@@ -421,8 +422,16 @@ static void _workspace_show(Con *workspace) {
         /* check if this workspace is currently visible */
         if (!workspace_is_visible(old)) {
             LOG("Closing old workspace (%p / %s), it is empty\n", old, old->name);
+            yajl_gen gen = ipc_marshal_workspace_event("empty", old, NULL);
             tree_close(old, DONT_KILL_WINDOW, false, false);
-            ipc_send_event("workspace", I3_IPC_EVENT_WORKSPACE, "{\"change\":\"empty\"}");
+
+            const unsigned char *payload;
+            ylength length;
+            y(get_buf, &payload, &length);
+            ipc_send_event("workspace", I3_IPC_EVENT_WORKSPACE, (const char *)payload);
+
+            y(free);
+
             ewmh_update_number_of_desktops();
             ewmh_update_desktop_names();
             ewmh_update_desktop_viewport();
@@ -766,7 +775,7 @@ void workspace_update_urgent_flag(Con *ws) {
     DLOG("Workspace urgency flag changed from %d to %d\n", old_flag, ws->urgent);
 
     if (old_flag != ws->urgent)
-        ipc_send_event("workspace", I3_IPC_EVENT_WORKSPACE, "{\"change\":\"urgent\"}");
+        ipc_send_workspace_event("urgent", ws, NULL);
 }
 
 /*