Imported Upstream version 0.2+gitdfdad95upstream/0.2+gitdfdad95

1 files changed, 139 insertions, 0 deletions

diff --git a/src/utilities/key.vala b/src/utilities/key.vala
new file mode 100644
index 0000000..6700b16
--- /dev/null
+++ b/src/utilities/key.vala
@@ -0,0 +1,139 @@
+/* 
+Copyright (c) 2011 by Simon Schneegans
+
+This program is free software: you can redistribute it and/or modify it
+under the terms of the GNU General Public License as published by the Free
+Software Foundation, either version 3 of the License, or (at your option)
+any later version.
+
+This program is distributed in the hope that it will be useful, but WITHOUT
+ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
+more details.
+
+You should have received a copy of the GNU General Public License along with
+this program.  If not, see <http://www.gnu.org/licenses/>. 
+*/
+
+namespace GnomePie {
+
+/////////////////////////////////////////////////////////////////////////    
+/// A class which represents a key stroke. It can be used to "press" 
+/// the associated keys.
+/////////////////////////////////////////////////////////////////////////
+
+public class Key : GLib.Object {
+
+    /////////////////////////////////////////////////////////////////////
+    /// Some static members, which are often used by this class.
+    /////////////////////////////////////////////////////////////////////    
+
+    private static X.Display display;
+
+    private static int shift_code;
+    private static int ctrl_code;
+    private static int alt_code;
+    private static int super_code;
+
+    /////////////////////////////////////////////////////////////////////
+    /// A human readable form of the Key's accelerator.
+    /////////////////////////////////////////////////////////////////////
+
+    public string label { get; private set; }
+    
+    /////////////////////////////////////////////////////////////////////
+    /// The accelerator of the Key.
+    /////////////////////////////////////////////////////////////////////
+    
+    public string accelerator { get; private set; }
+    
+    /////////////////////////////////////////////////////////////////////
+    /// Keycode and modifiers of this stroke.
+    /////////////////////////////////////////////////////////////////////
+    
+    private int key_code;
+    private Gdk.ModifierType modifiers;
+    
+    /////////////////////////////////////////////////////////////////////
+    /// C'tor, initializes all members.
+    /////////////////////////////////////////////////////////////////////
+    
+    public Key(string stroke) {
+        this.accelerator = stroke;
+        
+        uint keysym;
+        Gtk.accelerator_parse(stroke, out keysym, out this.modifiers);
+        this.key_code = display.keysym_to_keycode(keysym);
+        this.label = Gtk.accelerator_get_label(keysym, this.modifiers);
+    }
+    
+    /////////////////////////////////////////////////////////////////////
+    /// Initializes static members.
+    /////////////////////////////////////////////////////////////////////
+    
+    static construct {
+        display = new X.Display();
+    
+        shift_code = display.keysym_to_keycode(Gdk.keyval_from_name("Shift_L"));
+        ctrl_code =  display.keysym_to_keycode(Gdk.keyval_from_name("Control_L"));
+        alt_code =   display.keysym_to_keycode(Gdk.keyval_from_name("Alt_L"));
+        super_code = display.keysym_to_keycode(Gdk.keyval_from_name("Super_L"));
+    }
+
+    /////////////////////////////////////////////////////////////////////
+    /// Simulates the pressing of the Key .
+    /////////////////////////////////////////////////////////////////////
+
+    public void press() {
+        // store currently pressed modifier keys
+        Gdk.ModifierType current_modifiers = get_modifiers();
+
+        // release them and press the desired ones
+        press_modifiers(current_modifiers, false);
+        press_modifiers(this.modifiers, true);
+        
+        // send events to X
+        display.flush();
+
+        // press and release the actual key
+        X.Test.fake_key_event(this.display, this.key_code, true, 0);
+        X.Test.fake_key_event(this.display, this.key_code, false, 0);
+
+        // release the pressed modifiers and re-press the keys hold down by the user
+        press_modifiers(this.modifiers, false);
+        press_modifiers(current_modifiers, true);
+
+        // send events to X
+        display.flush();
+    }
+    
+    /////////////////////////////////////////////////////////////////////
+    /// Helper method returning currently hold down modifier keys.
+    /////////////////////////////////////////////////////////////////////
+    
+    private Gdk.ModifierType get_modifiers() {
+        Gdk.ModifierType modifiers;
+        Gdk.Display.get_default().get_pointer(null, null, null, out modifiers);
+        return modifiers;
+    }
+    
+    /////////////////////////////////////////////////////////////////////
+    /// Helper method which 'presses' the desired modifier keys.
+    /////////////////////////////////////////////////////////////////////
+    
+    private void press_modifiers(Gdk.ModifierType modifiers, bool down) {
+        if ((modifiers & Gdk.ModifierType.CONTROL_MASK) > 0)
+            X.Test.fake_key_event(this.display, this.ctrl_code, down, 0);
+
+        if ((modifiers & Gdk.ModifierType.SHIFT_MASK) > 0)
+            X.Test.fake_key_event(this.display, this.shift_code, down, 0);
+            
+        if ((modifiers & Gdk.ModifierType.MOD1_MASK) > 0)
+            X.Test.fake_key_event(this.display, this.alt_code, down, 0);
+
+        if ((modifiers & Gdk.ModifierType.SUPER_MASK) > 0)
+            X.Test.fake_key_event(this.display, this.super_code, down, 0);
+    }
+}
+
+}