[polari/wip/fmuellner/drop-target: 4/6] chatView: Re-enable drop target support

[Florian Müllner <fmuellner src gnome org>]

commit dade435710014e93d254e6d79119df9a475f5b27
Author: Florian Müllner <fmuellner gnome org>
Date:   Fri Feb 12 00:56:43 2016 +0100

    chatView: Re-enable drop target support
    
    Drag-n-drop provides an alternative to the clipboard for sharing content
    between applications, however our support has been disabled since commit
    ea4c7f61840. As we now have everything in place to hook up drops with the
    existing paste/upload UI for confirmation, we can finally make the chat
    log a drop target again.

 src/chatView.js     |    9 ++++++++-
 src/pasteManager.js |    5 -----
 src/roomStack.js    |   13 +++++++++++++
 3 files changed, 21 insertions(+), 6 deletions(-)
---
diff --git a/src/chatView.js b/src/chatView.js
index f441031..eb2196a 100644
--- a/src/chatView.js
+++ b/src/chatView.js
@@ -11,6 +11,7 @@ const Tpl = imports.gi.TelepathyLogger;
 
 const Lang = imports.lang;
 const Mainloop = imports.mainloop;
+const PasteManager = imports.pasteManager;
 const Signals = imports.signals;
 const Utils = imports.utils;
 
@@ -220,7 +221,9 @@ const ButtonTag = new Lang.Class({
 const ChatView = new Lang.Class({
     Name: 'ChatView',
     Extends: Gtk.ScrolledWindow,
+    Implements: [PasteManager.DropTargetIface],
     Properties: {
+        'can-drop': GObject.ParamSpec.override('can-drop', PasteManager.DropTargetIface),
         'max-nick-chars': GObject.ParamSpec.uint('max-nick-chars',
                                                  'max-nick-chars',
                                                  'max-nick-chars',
@@ -308,7 +311,7 @@ const ChatView = new Lang.Class({
         this._scrollBottom = adj.upper - adj.page_size;
 
         this._app = Gio.Application.get_default();
-        this._app.pasteManager.addWidget(this._view);
+        PasteManager.DropTargetIface.addTargets(this, this._view);
 
         this._hoverCursor = Gdk.Cursor.new(Gdk.CursorType.HAND1);
 
@@ -516,6 +519,10 @@ const ChatView = new Lang.Class({
         return this._maxNickChars;
     },
 
+    get can_drop() {
+        return this._channel != null;
+    },
+
     _updateMaxNickChars: function(length) {
         if (length <= this._maxNickChars)
             return;
diff --git a/src/pasteManager.js b/src/pasteManager.js
index b8458f0..c055d92 100644
--- a/src/pasteManager.js
+++ b/src/pasteManager.js
@@ -35,11 +35,6 @@ const PasteManager = new Lang.Class({
     _init: function() {
     },
 
-    addWidget: function(widget) {
-        // auto-paste needs some design; disable for now
-        return;
-    },
-
     pasteContent: function(content, title, callback) {
         if (typeof content == 'string') {
             Utils.gpaste(content, title, callback);
diff --git a/src/roomStack.js b/src/roomStack.js
index 05b2d38..80d161d 100644
--- a/src/roomStack.js
+++ b/src/roomStack.js
@@ -135,6 +135,19 @@ const RoomView = new Lang.Class({
                                  GObject.BindingFlags.SYNC_CREATE);
         sizeGroup.add_widget(this._entryArea);
 
+        this._view.connect('text-dropped', Lang.bind(this,
+            function(view, text) {
+               this._entryArea.pasteText(text, text.split('\n').length);
+            }));
+        this._view.connect('image-dropped', Lang.bind(this,
+            function(view, image) {
+               this._entryArea.pasteImage(image);
+            }));
+        this._view.connect('file-dropped', Lang.bind(this,
+            function(view, file) {
+               this._entryArea.pasteFile(file);
+            }));
+
         this.show_all();
     },