Add blur (#390)

Author: lenemter

protocol/pantheon-desktop-shell-v1.xml

@@ -104,6 +104,24 @@
         Tell the shell that the panel would like to be visible in the multitasking view.
       </description>
     </request>
+
+    <request name="add_blur">
+      <description summary="add blur">
+        Tell the window manager to add background blur.
+      </description>
+
+      <arg name="left" type="uint"/>
+      <arg name="right" type="uint"/>
+      <arg name="top" type="uint"/>
+      <arg name="bottom" type="uint"/>
+      <arg name="clip_radius" type="uint"/>
+    </request>
+
+    <request name="remove_blur">
+      <description summary="remove blur">
+        Tell the window manager to remove blur that was set in set_blur_region.
+      </description>
+    </request>
   </interface>
 
   <interface name="io_elementary_pantheon_widget_v1" version="1">
@@ -117,5 +135,21 @@
         Tell the shell to keep the surface above on all workspaces
       </description>
     </request>
+
+    <request name="make_centered">
+      <description summary="requests to keep the surface centered">
+        Request to keep the surface centered. This will cause keyboard focus
+        to not be granted automatically but having to be requested via focus.
+      </description>
+    </request>
+
+    <request name="focus">
+      <description summary="request keyboard focus">
+        Request keyboard focus, taking it away from any other window.
+        Keyboard focus must always be manually be requested and is
+        - in contrast to normal windows - never automatically granted
+        by the compositor.
+      </description>
+    </request>
   </interface>
 </protocol>

protocol/pantheon-desktop-shell.vapi

@@ -48,6 +48,8 @@ namespace Pantheon.Desktop {
         public void set_size (int width, int height);
         public void set_hide_mode (Pantheon.Desktop.HideMode hide_mode);
         public void request_visible_in_multitasking_view ();
+        public void add_blur (uint left, uint right, uint top, uint bottom, uint clip_radius);
+        public void remove_blur ();
     }
 
     [CCode (cheader_filename = "pantheon-desktop-shell-client-protocol.h", cname = "struct io_elementary_pantheon_widget_v1", cprefix = "io_elementary_pantheon_widget_v1_")]

src/MainWindow.vala

@@ -18,6 +18,7 @@ public class Dock.MainWindow : Gtk.ApplicationWindow {
 
     // Matches top margin in Launcher.css
     private const int TOP_MARGIN = 64;
+    private const int BORDER_RADIUS = 9;
 
     private Settings transparency_settings;
     private static Settings settings = new Settings ("io.elementary.dock");
@@ -28,6 +29,8 @@ public class Dock.MainWindow : Gtk.ApplicationWindow {
     private Gtk.Box main_box;
 
     private WindowDragManager window_drag_manager;
+    private BottomMargin bottom_margin;
+    private bool initialized_blur = false;
 
     class construct {
         set_css_name ("dock-window");
@@ -50,9 +53,11 @@ public class Dock.MainWindow : Gtk.ApplicationWindow {
         size_group.add_widget (overlay.child);
         size_group.add_widget (launcher_manager);
 
+        bottom_margin = new BottomMargin ();
+
         main_box = new Gtk.Box (VERTICAL, 0);
         main_box.append (overlay);
-        main_box.append (new BottomMargin ());
+        main_box.append (bottom_margin);
         child = main_box;
 
         remove_css_class ("background");
@@ -131,6 +136,21 @@ public class Dock.MainWindow : Gtk.ApplicationWindow {
                 item_manager_width,
                 surface.height - top_margin
             }));
+
+            if (initialized_blur) {
+                return;
+            }
+
+            Graphene.Rect bounds;
+            bottom_margin.compute_bounds (bottom_margin, out bounds);
+
+            initialized_blur = true;
+
+            if (panel != null) {
+                panel.add_blur (0, 0, 0, (int) bounds.get_height (), BORDER_RADIUS);
+            } else {
+                update_panel_x11 ();
+            }
         });
 
         registry_listener.global = registry_handle_global;
@@ -162,6 +182,12 @@ public class Dock.MainWindow : Gtk.ApplicationWindow {
 
             var value = "anchor=8:hide-mode=%d:restore-previous-region=1:visible-in-multitasking-view=1".printf (settings.get_enum ("autohide-mode"));
 
+            if (initialized_blur) {
+                Graphene.Rect bounds;
+                bottom_margin.compute_bounds (bottom_margin, out bounds);
+                value += ":blur=0,0,0,%d,%d".printf ((int) bounds.get_height (), BORDER_RADIUS);
+            }
+
             xdisplay.change_property (window, prop, X.XA_STRING, 8, 0, (uchar[]) value, value.length);
         }
     }