Imported Upstream version 0.3.1upstream/0.3.1

1 files changed, 161 insertions, 0 deletions

diff --git a/src/images/themedIcon.vala b/src/images/themedIcon.vala
new file mode 100644
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+/* 
+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 representing a square-shaped icon, themed according to the
+/// current theme of Gnome-Pie.
+/////////////////////////////////////////////////////////////////////////
+
+public class ThemedIcon : Image {
+
+    /////////////////////////////////////////////////////////////////////
+    /// A cache which stores loaded icon. The key is the icon name. When
+    /// the users icon theme or the theme of Gnome-Pie changes, these
+    /// cahces are cleared.
+    /////////////////////////////////////////////////////////////////////
+
+    private static Gee.HashMap<string, Cairo.ImageSurface?> active_cache { private get; private set; }
+    private static Gee.HashMap<string, Cairo.ImageSurface?> inactive_cache { private get; private set; }
+    
+    /////////////////////////////////////////////////////////////////////
+    /// Initializes the caches.
+    /////////////////////////////////////////////////////////////////////
+    
+    public static void init() {
+        clear_cache();
+        
+        Config.global.notify["theme"].connect(() => {
+            clear_cache();
+        });
+        
+        Gtk.IconTheme.get_default().changed.connect(() => {
+            clear_cache();
+        });
+    }
+    
+    /////////////////////////////////////////////////////////////////////
+    /// Clears the cache.
+    /////////////////////////////////////////////////////////////////////
+    
+    public static void clear_cache() {
+        active_cache = new Gee.HashMap<string, Cairo.ImageSurface?>();
+        inactive_cache = new Gee.HashMap<string, Cairo.ImageSurface?>();
+    }
+    
+    /////////////////////////////////////////////////////////////////////
+    /// Paint a slice icon according to the current theme.
+    /////////////////////////////////////////////////////////////////////
+    
+    public ThemedIcon(string icon_name, bool active) {
+        // check cache
+        var current_cache = active ? active_cache : inactive_cache;
+        var cached = current_cache.get(icon_name);
+        
+        if (cached != null) {
+            this.surface = cached;
+            return;
+        }
+    
+        // get layers for the desired slice type
+        var layers = active ? Config.global.theme.active_slice_layers : Config.global.theme.inactive_slice_layers;
+        
+        // get max size
+        int size = 0;
+        foreach (var layer in layers) {
+            if (layer.image.width() > size) size = layer.image.width();
+        }
+        
+        this.surface = new Cairo.ImageSurface(Cairo.Format.ARGB32, size, size);
+        
+        // get size of icon layer
+        int icon_size = size;
+        foreach (var layer in layers) {
+            if (layer.is_icon) icon_size = layer.image.width();
+        }
+    
+        Image icon;
+        if (icon_name.contains("/"))
+            icon = new Image.from_file_at_size(icon_name, icon_size, icon_size);
+        else
+            icon = new Icon(icon_name, icon_size);
+        
+        var color = new Color.from_icon(icon);
+        var ctx = this.context();
+        
+        ctx.translate(size/2, size/2);
+        ctx.set_operator(Cairo.Operator.OVER);
+        
+        // now render all layers on top of each other
+        foreach (var layer in layers) {
+        
+            if (layer.colorize) {
+                ctx.push_group();
+            }
+                    
+            if (layer.is_icon) {
+            
+                ctx.push_group();
+                
+                layer.image.paint_on(ctx);
+                
+                ctx.set_operator(Cairo.Operator.IN);
+                
+                if (layer.image.width() != icon_size) {
+                    if (icon_name.contains("/"))
+                        icon = new Image.from_file_at_size(icon_name, layer.image.width(), layer.image.width());
+                    else
+                        icon = new Icon(icon_name,layer.image.width());
+                }
+                
+                icon.paint_on(ctx);
+
+                ctx.pop_group_to_source();
+                ctx.paint();
+                ctx.set_operator(Cairo.Operator.OVER);
+                
+            } else {
+                layer.image.paint_on(ctx);
+            }
+            
+            // colorize the whole layer if neccasary
+            if (layer.colorize) {
+                ctx.set_operator(Cairo.Operator.ATOP);
+                ctx.set_source_rgb(color.r, color.g, color.b);
+                ctx.paint();
+                
+                ctx.set_operator(Cairo.Operator.OVER);
+                ctx.pop_group_to_source();
+                ctx.paint();
+            }
+        }
+        
+        // store the surface in cache
+        current_cache.set(icon_name, this.surface);
+    }
+    
+    /////////////////////////////////////////////////////////////////////
+    /// Returns the size of the icon in pixels. Greetings to Liskov.
+    /////////////////////////////////////////////////////////////////////
+    
+    public int size() {
+        return base.width();
+    }
+}
+
+}