From 2c3b4bee71d588f853139ea33e4fc95aff391350 Mon Sep 17 00:00:00 2001
From: Tomeu Vizoso <tomeu@tomeuvizoso.net>
Date: Wed, 13 Jun 2007 19:14:28 +0000
Subject: Add target text/uri-list for images when dragging them out of mozilla.

---
(limited to 'dnd.py')

diff --git a/dnd.py b/dnd.py
new file mode 100644
index 0000000..b916276
--- /dev/null
+++ b/dnd.py
@@ -0,0 +1,88 @@
+# Copyright (C) 2007, One Laptop Per Child
+#
+# 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 2 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, write to the Free Software
+# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+
+import os.path
+import tempfile
+
+from xpcom.nsError import *
+from xpcom import COMException
+from xpcom import components
+from xpcom.components import interfaces
+
+from documentnode import DocumentNode
+
+class UriListDataProvider:
+    _com_interfaces_ = interfaces.nsIFlavorDataProvider
+    
+    def __init__(self, doc_node):
+        self._doc_node = doc_node
+
+    def getFlavorData(self, transferable, flavor):
+        if flavor != 'text/uri-list':
+            raise COMException(NS_ERROR_NOT_IMPLEMENTED)
+
+        mime_type = self._doc_node.get_image_mime_type()
+        image_name = self._doc_node.get_image_name()
+        image_name, file_ext = os.path.splitext(image_name)
+        
+        if file_ext:
+            file_ext = file_ext[1:]
+
+        cls = components.classes['@mozilla.org/mime;1']
+        mime_service = cls.getService(interfaces.nsIMIMEService)
+        file_ext = mime_service.getPrimaryExtension(mime_type, file_ext)
+            
+        f, file_path = tempfile.mkstemp(image_name + '.' + file_ext)
+        del f
+
+        self._doc_node.save_image(file_path)
+
+        cls = components.classes['@mozilla.org/supports-string;1']        
+        string_supports = cls.createInstance(interfaces.nsISupportsString)
+        string_supports.data = 'file://' + file_path
+
+        return string_supports, 32
+
+class DragDropHooks:
+    _com_interfaces_ = interfaces.nsIClipboardDragDropHooks
+    
+    def __init__(self, browser):
+        self._browser = browser
+    
+    def allowDrop(self, event, session):
+        raise COMException(NS_ERROR_NOT_IMPLEMENTED)
+
+    def allowStartDrag(self, event):
+        raise COMException(NS_ERROR_NOT_IMPLEMENTED)
+
+    def onPasteOrDrop(self, event, trans):
+        return False
+
+    def onCopyOrDrag(self, event, trans):
+        mouse_event = event.queryInterface(interfaces.nsIDOMMouseEvent)
+        event_target = mouse_event.target
+        target_node = event_target.queryInterface(interfaces.nsIDOMNode)
+        document_node = DocumentNode(target_node, self._browser.web_navigation)
+
+        if document_node.is_image():
+            trans.removeDataFlavor('text/x-moz-url')
+            trans.addDataFlavor('text/uri-list')
+            
+            data_provider = UriListDataProvider(document_node)
+            trans.setTransferData('text/uri-list', data_provider, 0)
+
+        return True
+
--
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