[polari] entryArea: Don't flash pasted text when using paste service

[Florian Müllner <fmuellner src gnome org>]

commit 362990fee0f5ac9d6afe3d77e6da2f5dbcabf26a
Author: Florian Müllner <fmuellner gnome org>
Date:   Fri Oct 16 15:07:27 2015 +0200

    entryArea: Don't flash pasted text when using paste service
    
    We currently decide whether to offer paste service integration when
    the entry's text changes, which means that pasted text flashes up
    briefly before switching to the paste UI. We can avoid this by
    subclassing GtkEntry and intercepting the paste operation itself.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=756848

 src/entryArea.js |   47 ++++++++++++++++++++++++++++++++++++++++-------
 1 files changed, 40 insertions(+), 7 deletions(-)
---
diff --git a/src/entryArea.js b/src/entryArea.js
index 9d33abf..95892d1 100644
--- a/src/entryArea.js
+++ b/src/entryArea.js
@@ -1,5 +1,6 @@
 const Gdk = imports.gi.Gdk;
 const GLib = imports.gi.GLib;
+const GObject = imports.gi.GObject;
 const Gtk = imports.gi.Gtk;
 
 const ChatView = imports.chatView;
@@ -13,6 +14,40 @@ const MAX_NICK_UPDATE_TIME = 5; /* s */
 const MAX_LINES = 5;
 
 
+const ChatEntry = new Lang.Class({
+    Name: 'ChatEntry',
+    Extends: Gtk.Entry,
+    Signals: { 'text-pasted': { param_types: [GObject.TYPE_STRING,
+                                              GObject.TYPE_INT] } },
+
+    _init: function(params) {
+        this.parent(params);
+
+        this._useDefaultHandler = false;
+    },
+
+    vfunc_paste_clipboard: function(entry) {
+        if (!this.editable || this._useDefaultHandler) {
+            this.parent();
+            return;
+        }
+
+        let clipboard = Gtk.Clipboard.get_default(this.get_display());
+        clipboard.request_text(Lang.bind(this,
+            function(clipboard, text) {
+                let nLines = text.split('\n').length;
+                if (nLines >= MAX_LINES) {
+                    this.emit('text-pasted', text, nLines);
+                    return;
+                }
+
+                this._useDefaultHandler = true;
+                this.emit('paste-clipboard');
+                this._useDefaultHandler = false;
+            }));
+    },
+});
+
 const EntryArea = new Lang.Class({
     Name: 'EntryArea',
 
@@ -82,8 +117,8 @@ const EntryArea = new Lang.Class({
                 return Gdk.EVENT_PROPAGATE;
             }));
 
-        this._entry = new Gtk.Entry({ hexpand: true,
-                                      activates_default: true });
+        this._entry = new ChatEntry({ hexpand: true, activates_default: true });
+        this._entry.connect('text-pasted', Lang.bind(this, this._onTextPasted));
         this._entry.connect('changed', Lang.bind(this, this._onEntryChanged));
         chatBox.add(this._entry);
 
@@ -186,16 +221,14 @@ const EntryArea = new Lang.Class({
 
     _onEntryChanged: function() {
         this._entry.get_style_context().remove_class('error');
-        let nLines = this._entry.text.split('\n').length;
-
-        if (nLines < MAX_LINES)
-            return;
+    },
 
+    _onTextPasted: function(entry, text, nLines) {
         this._multiLinelabel.label =
             ngettext("Paste %s line of text to public paste service?",
                      "Paste %s lines of text to public paste service?",
                      nLines).format(nLines);
-        this._pasteButton.action_target = new GLib.Variant('s', this._entry.text);
+        this._pasteButton.action_target = new GLib.Variant('s', text);
         this.widget.visible_child_name = 'multiline';
         this._pasteButton.grab_focus();
     },