[gnome-documents/wip/pranavk/lokdocview: 6/7] Add zoom feature

[Pranav Kant <pranavk src gnome org>]

commit 2cab4986de9aaee3a096bb3eda72cc4083551e3a
Author: Pranav Kant <pranavk gnome org>
Date:   Tue Aug 18 09:45:49 2015 +0530

    Add zoom feature

 src/application.js |    6 ++++--
 src/embed.js       |    2 ++
 src/lokview.js     |   22 ++++++++++++++++++++++
 src/preview.js     |    4 ++++
 4 files changed, 32 insertions(+), 2 deletions(-)
---
diff --git a/src/application.js b/src/application.js
index 9a02527..d09ad7d 100644
--- a/src/application.js
+++ b/src/application.js
@@ -572,9 +572,11 @@ const Application = new Lang.Class({
             { name: 'find-prev', accel: '<Shift><Primary>g',
               window_mode: WindowMode.WindowMode.PREVIEW },
             { name: 'zoom-in', accels: ['<Primary>plus', '<Primary>equal'],
-              window_mode: WindowMode.WindowMode.PREVIEW },
+              window_mode: [WindowMode.WindowMode.PREVIEW,
+                            WindowMode.WindowMode.LOKVIEW] },
             { name: 'zoom-out', accel: '<Primary>minus',
-              window_mode: WindowMode.WindowMode.PREVIEW },
+              window_mode: [WindowMode.WindowMode.PREVIEW,
+                            WindowMode.WindowMode.LOKVIEW] },
             { name: 'rotate-left', accel: '<Primary>Left',
               window_mode: WindowMode.WindowMode.PREVIEW },
             { name: 'rotate-right', accel: '<Primary>Right',
diff --git a/src/embed.js b/src/embed.js
index 0b99bd8..9141bd1 100644
--- a/src/embed.js
+++ b/src/embed.js
@@ -485,6 +485,8 @@ const Embed = new Lang.Class({
     _prepareForLOKView: function() {
         if (this._preview)
             this._preview.setModel(null);
+        if (this._edit)
+            this._edit.setUri(null);
         if (this._toolbar)
             this._toolbar.destroy();
 
diff --git a/src/lokview.js b/src/lokview.js
index c2c4386..c94cc09 100644
--- a/src/lokview.js
+++ b/src/lokview.js
@@ -68,11 +68,30 @@ const LOKView = new Lang.Class({
 
         this.show_all();
 
+        this._zoomIn = Application.application.lookup_action('zoom-in');
+        let zoomInId = this._zoomIn.connect('activate', Lang.bind(this,
+            function() {
+                let zoomLevel = this.view.get_zoom();
+                this.view.set_zoom(zoomLevel * 2);
+            }));
+
+        this._zoomOut = Application.application.lookup_action('zoom-out');
+        let zoomOutId = this._zoomOut.connect('activate', Lang.bind(this,
+            function() {
+                let zoomLevel = this.view.get_zoom();
+                this.view.set_zoom(zoomLevel / 2);
+            }));
+
         Application.documentManager.connect('load-started',
                                             Lang.bind(this, this._onLoadStarted));
         Application.documentManager.connect('load-finished',
                                             Lang.bind(this, this._onLoadFinished));
 
+        this.connect('destroy', Lang.bind(this,
+           function() {
+               this._zoomIn.disconnect(zoomInId);
+               this._zoomOut.disconnect(zoomOutId);
+           }));
     },
 
     _onLoadStarted: function() {
@@ -122,6 +141,9 @@ const LOKViewToolbar = new Lang.Class({
         this._gearMenu = Application.application.lookup_action('gear-menu');
         this._gearMenu.enabled = true;
 
+        this._lokView._zoomIn.enabled = true;
+        this._lokView._zoomOut.enabled = true;
+
         // back button, on the left of the toolbar
         let backButton = this.addBackButton();
         backButton.connect('clicked', Lang.bind(this,
diff --git a/src/preview.js b/src/preview.js
index 1e78b86..52d8f50 100644
--- a/src/preview.js
+++ b/src/preview.js
@@ -100,6 +100,8 @@ const PreviewView = new Lang.Class({
         this._zoomIn = Application.application.lookup_action('zoom-in');
         let zoomInId = this._zoomIn.connect('activate', Lang.bind(this,
             function() {
+                if (!this._model)
+                    return;
                 this._model.set_sizing_mode(EvView.SizingMode.FREE);
                 this.view.zoom_in();
             }));
@@ -107,6 +109,8 @@ const PreviewView = new Lang.Class({
         this._zoomOut = Application.application.lookup_action('zoom-out');
         let zoomOutId = this._zoomOut.connect('activate', Lang.bind(this,
             function() {
+                if (!this._model)
+                    return;
                 this._model.set_sizing_mode(EvView.SizingMode.FREE);
                 this.view.zoom_out();
             }));