[ease/plugins: 2/37] Added base for OpenClipart plugin.

[Nate Stedman <natesm src gnome org>]

commit 91d8978b9108b65f23dc9d31374229632176e006
Author: Nate Stedman <natesm gmail com>
Date:   Thu Jun 17 03:45:58 2010 -0400

    Added base for OpenClipart plugin.

 plugins/Makefile        |    6 ++
 plugins/oca-dialog.vala |  213 +++++++++++++++++++++++++++++++++++++++++++++++
 plugins/oca-image.vala  |   10 ++
 3 files changed, 229 insertions(+), 0 deletions(-)
---
diff --git a/plugins/Makefile b/plugins/Makefile
index fe3dd13..0f4d662 100644
--- a/plugins/Makefile
+++ b/plugins/Makefile
@@ -1,6 +1,12 @@
 CFLAGS = --pkg gtk+-2.0 --pkg gmodule-2.0 --pkg json-glib-1.0 --pkg rest-extras-0.6
+OCAFLAGS = --pkg gtk+-2.0 --pkg libsexy --pkg rest-extras-0.6 --pkg libxml-2.0 -o openclipart
 
 flickr:flickr.vala
 	valac $(CFLAGS) flickr.vala
+	
+oca: oca-dialog.vala oca-image.vala
+	valac -g $(OCAFLAGS) oca-dialog.vala oca-image.vala
+
 clean:
 	rm -rf flickr
+	rm -rf openclipart
diff --git a/plugins/oca-dialog.vala b/plugins/oca-dialog.vala
new file mode 100644
index 0000000..1047fb9
--- /dev/null
+++ b/plugins/oca-dialog.vala
@@ -0,0 +1,213 @@
+public class OCA.Dialog : Gtk.Dialog
+{
+	private Gtk.IconView icons;
+	private Gtk.ScrolledWindow icons_scroll;
+	private Sexy.IconEntry search;
+	private Gtk.Button button;
+	private Gtk.Spinner spinner;
+	private Gtk.Alignment spinner_align;
+	private Rest.Proxy proxy;
+	private Rest.ProxyCall call;
+	private Gtk.VBox main_vbox;
+	
+	private const string REST_URL =
+		"http://www.openclipart.org/media/feed/rss/";;
+	
+	private const Sexy.IconEntryPosition ICON_POS =
+		Sexy.IconEntryPosition.PRIMARY;
+	
+	private const Gtk.IconSize SIZE = Gtk.IconSize.MENU;
+	private const int SPIN_SIZE = 40;
+	
+	public Dialog()
+	{
+		// search field
+		search = new Sexy.IconEntry();
+		search.set_icon(ICON_POS, new Gtk.Image.from_stock("gtk-find", SIZE));
+		search.add_clear_button();
+		
+		// search button
+		button = new Gtk.Button.from_stock("gtk-find");
+		button.clicked.connect((sender) => {
+			// create the rest proxy call
+			proxy = new Rest.Proxy(REST_URL, false);
+			call = proxy.new_call();
+			call.set_function(search.text);
+			
+			// remove the icons, if needed
+			if (icons_scroll.get_parent() == main_vbox)
+			{
+				main_vbox.remove(icons_scroll);
+			}
+			
+			// add the spinner
+			main_vbox.pack_end(spinner_align, true, true, 0);
+			spinner.start();
+			spinner_align.show_all();
+			
+			// run the call
+			call.run_async(on_call_finish, this);
+		});
+		
+		// spinner
+		spinner = new Gtk.Spinner();
+		spinner.set_size_request(SPIN_SIZE, SPIN_SIZE);
+		spinner_align = new Gtk.Alignment(0.5f, 0.5f, 0, 0);
+		spinner_align.add(spinner);
+		
+		// icon view
+		icons = new Gtk.IconView();
+		icons_scroll = new Gtk.ScrolledWindow(null, null);
+		icons_scroll.add_with_viewport(icons);
+		
+		// pack search field and button
+		var hbox = new Gtk.HBox(false, 5);
+		hbox.pack_start(search, true, true, 0);
+		hbox.pack_start(button, false, false, 0);
+		
+		// pack top and bottom
+		main_vbox = new Gtk.VBox(false, 0);
+		main_vbox.pack_start(hbox, false, false, 0);
+		(get_content_area() as Gtk.Box).pack_start(main_vbox, true, true, 0);
+	}
+	
+	private void on_call_finish(Rest.ProxyCall call)
+	{
+		// update UI
+		main_vbox.remove(spinner_align);
+		main_vbox.pack_start(icons_scroll, true, true, 0);
+		icons_scroll.show_all();
+		
+		Xml.Parser.init();
+		
+		Xml.Doc* doc = Xml.Parser.parse_doc(call.get_payload());
+		// TODO: better error handling
+		if (doc == null) return;
+		
+		Xml.Node* root = doc->get_root_element();
+		
+		// find the "channel" node
+		Xml.Node* channel = root->children;
+		for (; channel->name != "channel"; channel = channel->next);
+		
+		// create list and iterator
+		var model = new Gtk.ListStore(3, typeof(Gdk.Pixbuf), typeof(string),
+		                                 typeof(OCA.Image));
+		var tree_itr = Gtk.TreeIter();
+		
+		// loop over outermost nodes
+		for (Xml.Node* itr = channel->children;
+		     itr != null; itr = itr->next)
+		{
+			if (itr->type != Xml.ElementType.ELEMENT_NODE) continue;
+			
+			// if the node is an item, add it
+			if (itr->name == "item")
+			{
+				OCA.Image image = OCA.Image();
+				
+				for (Xml.Node* tag = itr->children;
+				     tag != null; tag = tag->next)
+				{
+					switch (tag->name)
+					{
+						case "title":
+							image.title = tag->children->content;
+							break;
+						case "link":
+							image.link = tag->children->content;
+							break;
+						case "dc:creator":
+							image.creator = tag->children->content;
+							break;
+						case "license":
+							image.license = tag->children->content;
+							break;
+						case "description":
+							image.description = tag->children->content;
+							break;
+						case "enclosure":
+							for (Xml.Attr* prop = tag->properties;
+							     prop != null; prop = prop->next)
+							{
+								if (prop->name == "url")
+								{
+									image.file_link = prop->children->content;
+								}
+							}
+							break;
+						case "media:thumbnail":
+							for (Xml.Attr* prop = tag->properties;
+							     prop != null; prop = prop->next)
+							{
+								if (prop->name == "url")
+								{
+									image.thumb_link = prop->children->content;
+								}
+							}
+							break;
+					}
+				}
+				
+				// get the pixbuf
+				var pixbuf = gdk_pixbuf_from_uri(image.thumb_link == null ?
+				                                 image.file_link : 
+				                                 image.thumb_link);
+				
+				// append to the model
+				model.append(out tree_itr);
+				model.set(tree_itr, Column.PIXBUF, pixbuf,
+				                    Column.TEXT, image.title);
+			}
+		}
+		
+		Xml.Parser.cleanup();
+		
+		// set icons
+		icons.set_model(model);
+		icons.text_column = Column.TEXT;
+		icons.pixbuf_column = Column.PIXBUF;
+	}
+	
+	private enum Column
+	{
+		PIXBUF = 0,
+		TEXT = 1,
+		OCA_IMAGE = 2
+	}
+	
+	private Gdk.Pixbuf? gdk_pixbuf_from_uri (string uri) {
+
+		File file = File.new_for_uri (uri);
+		FileInputStream filestream;
+		try {
+			filestream = file.read (null);
+		} catch (Error e) {
+			filestream = null;
+			error ("Couldn't read distant file : %s", e.message);
+		}
+		assert (filestream != null);
+		Gdk.Pixbuf pix;
+		try {
+			pix = new Gdk.Pixbuf.from_stream_at_scale (filestream,
+														   200,
+														   200,
+														   true,
+														   null);
+		} catch (Error e) {
+			error ("Couldn't create pixbuf from file: %s", e.message);
+			pix = null;
+		}
+		return pix;
+	}
+}
+
+public static int main(string[] args)
+{
+	Gtk.init(ref args);
+	var dialog = new OCA.Dialog();
+	dialog.show_all();
+	dialog.run();
+	
+	return 0;
+}
diff --git a/plugins/oca-image.vala b/plugins/oca-image.vala
new file mode 100644
index 0000000..ec985e2
--- /dev/null
+++ b/plugins/oca-image.vala
@@ -0,0 +1,10 @@
+public struct OCA.Image
+{
+	public string title;
+	public string link;
+	public string creator;
+	public string description;
+	public string license;
+	public string file_link;
+	public string thumb_link;
+}