[gnome-documents] preview: move go-prev/go-next to actions

[Cosimo Cecchi <cosimoc src gnome org>]

commit e7bb593da5c68a220bf2d012b613d4863af90ffa
Author: Cosimo Cecchi <cosimoc gnome org>
Date:   Sun Oct 30 21:50:30 2016 -0700

    preview: move go-prev/go-next to actions
    
    We can avoid specifying keybindings manually this way.

 src/mainWindow.js |   16 ----------------
 src/preview.js    |    8 +++++++-
 2 files changed, 7 insertions(+), 17 deletions(-)
---
diff --git a/src/mainWindow.js b/src/mainWindow.js
index 9435209..90db648 100644
--- a/src/mainWindow.js
+++ b/src/mainWindow.js
@@ -218,8 +218,6 @@ const MainWindow = new Lang.Class({
     _handleKeyPreview: function(event) {
         let keyval = event.get_keyval()[1];
         let preview = this._embed.getPreview();
-        let def_mod_mask = Gtk.accelerator_get_default_mod_mask();
-        let state = event.get_state()[1];
         let windowMode = Application.modeController.getWindowMode();
 
         if (keyval == Gdk.KEY_Escape &&
@@ -236,20 +234,6 @@ const MainWindow = new Lang.Class({
             return false;
         }
 
-        if (((keyval == Gdk.KEY_Page_Up) &&
-            ((state & Gdk.ModifierType.CONTROL_MASK) != 0)) ||
-            ((keyval == Gdk.KEY_Left) && ((state & def_mod_mask) == 0))) {
-            preview.goPrev();
-            return true;
-        }
-
-        if (((keyval == Gdk.KEY_Page_Down) &&
-            ((state & Gdk.ModifierType.CONTROL_MASK) != 0)) ||
-            ((keyval == Gdk.KEY_Right) && ((state & def_mod_mask) == 0))) {
-            preview.goNext();
-            return true;
-        }
-
         if (keyval == Gdk.KEY_Page_Up) {
             try {
                 preview.scroll(Gtk.ScrollType.PAGE_BACKWARD);
diff --git a/src/preview.js b/src/preview.js
index a387dea..08e7fe1 100644
--- a/src/preview.js
+++ b/src/preview.js
@@ -79,7 +79,13 @@ const Preview = new Lang.Class({
             { name: 'properties',
               callback: Lang.bind(this, this._properties) },
             { name: 'open-current',
-              callback: Lang.bind(this, this._openCurrent) }
+              callback: Lang.bind(this, this._openCurrent) },
+            { name: 'prev-page',
+              callback: Lang.bind(this, this.goPrev),
+              accels: ['<Primary>Page_Up', 'Left'] },
+            { name: 'next-page',
+              callback: Lang.bind(this, this.goNext),
+              accels: ['<Primary>Page_Down', 'Right'] }
         ];
     },