keybindings: Add toggle-tile-left/right bindings

Having keybindings for side-by-side tiling has been requested for
a long time, so add this support now.

https://bugzilla.gnome.org/show_bug.cgi?id=648700

.gitignore

@@ -19,6 +19,7 @@ libtool
 ltmain.sh
 missing
 .deps
+src/50-mutter-windows.xml
 src/mutter-wm.desktop
 src/mutter.desktop
 *.o

po/POTFILES.in

@@ -1,5 +1,6 @@
 # List of source files containing translatable strings.
 # Please keep this file sorted alphabetically.
+src/50-mutter-windows.xml.in
 src/compositor/compositor.c
 src/core/bell.c
 src/core/core.c

src/50-mutter-windows.xml.in

@@ -0,0 +1,15 @@
+<?xml version="1.0" encoding="UTF-8" ?>
+<KeyListEntries schema="org.gnome.mutter.keybindings"
+                group="system"
+                _name="Windows"
+                wm_name="Mutter"
+                package="mutter">
+
+	<KeyListEntry name="toggle-tiled-left"
+                      _description="View split on left"/>
+
+	<KeyListEntry name="toggle-tiled-right"
+                      _description="View split on right"/>
+
+</KeyListEntries>
+

src/Makefile.am

@@ -261,6 +261,11 @@ wmproperties_in_files=mutter-wm.desktop.in
 wmproperties_files=$(wmproperties_in_files:.desktop.in=.desktop)
 wmproperties_DATA = $(wmproperties_files)
 
+xmldir       = @GNOME_KEYBINDINGS_KEYSDIR@
+xml_in_files = \
+        50-mutter-windows.xml.in
+xml_DATA     = $(xml_in_files:.xml.in=.xml)
+
 gsettings_SCHEMAS = org.gnome.mutter.gschema.xml
 @INTLTOOL_XML_NOMERGE_RULE@
 @GSETTINGS_RULES@
@@ -279,6 +284,7 @@ CLEANFILES =					\
 	mutter.desktop				\
 	mutter-wm.desktop			\
 	org.gnome.mutter.gschema.xml		\
+	$(xml_DATA)				\
 	$(mutter_built_sources)			\
 	$(typelib_DATA)				\
 	$(gir_DATA)
@@ -295,6 +301,7 @@ EXTRA_DIST=$(desktopfiles_files) 	\
 	$(IMAGES) 			\
 	$(desktopfiles_in_files)	\
 	$(wmproperties_in_files)	\
+	$(xml_in_files)			\
 	org.gnome.mutter.gschema.xml.in \
 	mutter-schemas.convert \
 	libmutter.pc.in \

src/core/keybindings.c

@@ -3232,6 +3232,45 @@ handle_toggle_above       (MetaDisplay    *display,
     meta_window_make_above (window);
 }
 
+static void
+handle_toggle_tiled (MetaDisplay    *display,
+                     MetaScreen     *screen,
+                     MetaWindow     *window,
+                     XEvent         *event,
+                     MetaKeyBinding *binding,
+                     gpointer        dummy)
+{
+  MetaTileMode mode = binding->handler->data;
+
+  if ((META_WINDOW_TILED_LEFT (window) && mode == META_TILE_LEFT) ||
+      (META_WINDOW_TILED_RIGHT (window) && mode == META_TILE_RIGHT))
+    {
+      window->tile_monitor_number = window->saved_maximize ? window->monitor->number
+                                                           : -1;
+      window->tile_mode = window->saved_maximize ? META_TILE_MAXIMIZED
+                                                 : META_TILE_NONE;
+
+      if (window->saved_maximize)
+        meta_window_maximize (window, META_MAXIMIZE_VERTICAL |
+                                      META_MAXIMIZE_HORIZONTAL);
+      else
+        meta_window_unmaximize (window, META_MAXIMIZE_VERTICAL |
+                                        META_MAXIMIZE_HORIZONTAL);
+    }
+  else if (meta_window_can_tile_side_by_side (window))
+    {
+      window->tile_monitor_number = window->monitor->number;
+      window->tile_mode = mode;
+      /* Maximization constraints beat tiling constraints, so if the window
+       * is maximized, tiling won't have any effect unless we unmaximize it
+       * horizontally first; rather than calling meta_window_unmaximize(),
+       * we just set the flag and rely on meta_window_tile() syncing it to
+       * save an additional roundtrip.
+      window->maximized_horizontally = FALSE;
+      meta_window_tile (window);
+    }
+}
+
 static void
 handle_toggle_maximized    (MetaDisplay    *display,
                            MetaScreen     *screen,
@@ -3889,6 +3928,20 @@ init_builtin_key_bindings (MetaDisplay *display)
                           META_KEYBINDING_ACTION_TOGGLE_MAXIMIZED,
                           handle_toggle_maximized, 0);
 
+  add_builtin_keybinding (display,
+                          "toggle-tiled-left",
+                          SCHEMA_MUTTER_KEYBINDINGS,
+                          META_KEY_BINDING_PER_WINDOW,
+                          META_KEYBINDING_ACTION_TOGGLE_TILED_LEFT,
+                          handle_toggle_tiled, META_TILE_LEFT);
+
+  add_builtin_keybinding (display,
+                          "toggle-tiled-right",
+                          SCHEMA_MUTTER_KEYBINDINGS,
+                          META_KEY_BINDING_PER_WINDOW,
+                          META_KEYBINDING_ACTION_TOGGLE_TILED_RIGHT,
+                          handle_toggle_tiled, META_TILE_RIGHT);
+
   add_builtin_keybinding (display,
                           "toggle-above",
                           SCHEMA_COMMON_KEYBINDINGS,

src/meta/prefs.h

@@ -191,6 +191,8 @@ typedef enum _MetaKeyBindingAction
   META_KEYBINDING_ACTION_ACTIVATE_WINDOW_MENU,
   META_KEYBINDING_ACTION_TOGGLE_FULLSCREEN,
   META_KEYBINDING_ACTION_TOGGLE_MAXIMIZED,
+  META_KEYBINDING_ACTION_TOGGLE_TILED_LEFT,
+  META_KEYBINDING_ACTION_TOGGLE_TILED_RIGHT,
   META_KEYBINDING_ACTION_TOGGLE_ABOVE,
   META_KEYBINDING_ACTION_MAXIMIZE,
   META_KEYBINDING_ACTION_UNMAXIMIZE,

src/org.gnome.mutter.gschema.xml.in

@@ -83,6 +83,14 @@
       <default><![CDATA[['<Control><Shift><Alt>r']]]></default>
     </key>
 
+    <key name="toggle-tiled-left" type="as">
+      <default><![CDATA[['<Super>Left']]]></default>
+    </key>
+
+    <key name="toggle-tiled-right" type="as">
+      <default><![CDATA[['<Super>Right']]]></default>
+    </key>
+
     <key name="tab-popup-select" type="as">
       <default>[]</default>
       <_summary>Select window from tab popup</_summary>