[gnome-documents/wip/lokdocview-rebase: 18/27] Add ViewTypes for different backends

[Debarshi Ray <debarshir src gnome org>]

commit 8a8bba0d606fb6ec6f8505675ce249b228577f9c
Author: Bastien Nocera <hadess hadess net>
Date:   Sun Dec 6 21:58:17 2015 +0100

    Add ViewTypes for different backends
    
    This should simplify adding subsequent backends, later on. This will
    still require major cleanups to make sure that all backend-specific code
    is moved into the backend though.

 src/documents.js |   18 ++++++++++++++++++
 src/embed.js     |   39 ++++++++++++++++++++++++---------------
 src/lokview.js   |    9 ++++-----
 src/preview.js   |    7 ++++++-
 4 files changed, 52 insertions(+), 21 deletions(-)
---
diff --git a/src/documents.js b/src/documents.js
index 3378de2..6713b00 100644
--- a/src/documents.js
+++ b/src/documents.js
@@ -45,6 +45,13 @@ const Search = imports.search;
 const TrackerUtils = imports.trackerUtils;
 const Utils = imports.utils;
 
+// Those are the per-document-type views
+const ViewType = {
+    UNSET: 0,
+    EV: 1,
+    LOK: 2
+};
+
 const DeleteItemJob = new Lang.Class({
     Name: 'DeleteItemJob',
 // deletes the given resource
@@ -234,6 +241,7 @@ const DocCommon = new Lang.Class({
         this.origPixbuf = null;
         this.defaultApp = null;
         this.defaultAppName = null;
+        this.viewType = ViewType.UNSET;
 
         this.mimeType = null;
         this.rdfType = null;
@@ -693,6 +701,14 @@ const DocCommon = new Lang.Class({
         log('Error: DocCommon implementations must override getSourceLink');
     },
 
+    updateViewType: function() {
+        if (LOKView.isOpenDocumentFormat(this.mimeType) && !Application.application.isBooks) {
+            this.viewType = ViewType.LOK;
+        } else {
+            this.viewType = ViewType.EV;
+        }
+    },
+
     getWhere: function() {
         let retval = '';
 
@@ -1380,6 +1396,7 @@ const DocumentManager = new Lang.Class({
         this._clearActiveDocModel();
 
         this._loaderCancellable = new Gio.Cancellable();
+        doc.updateViewType();
         this.emit('load-started', doc);
         doc.load(passwd, this._loaderCancellable, Lang.bind(this, this._onDocumentLoaded));
     },
@@ -1438,6 +1455,7 @@ const DocumentManager = new Lang.Class({
             recentManager.add_item(doc.uri);
 
             this._loaderCancellable = new Gio.Cancellable();
+            doc.updateViewType();
             this.emit('load-started', doc);
             doc.load(null, this._loaderCancellable, Lang.bind(this, this._onDocumentLoaded));
         }
diff --git a/src/embed.js b/src/embed.js
index dca45f1..a7486f8 100644
--- a/src/embed.js
+++ b/src/embed.js
@@ -153,6 +153,9 @@ const Embed = new Lang.Class({
         case WindowMode.WindowMode.PREVIEW:
             view = this._previewEv;
             break;
+        case WindowMode.WindowMode.PREVIEW_LOK:
+            view = this._previewLok;
+            break;
         case WindowMode.WindowMode.SEARCH:
             view = this._search;
             break;
@@ -352,25 +355,31 @@ const Embed = new Lang.Class({
     },
 
     _onLoadFinished: function(manager, doc, docModel) {
-        if (doc && docModel) {
-            if (Application.application.isBooks)
-                docModel.set_sizing_mode(EvView.SizingMode.FIT_PAGE);
-            else
-                docModel.set_sizing_mode(EvView.SizingMode.AUTOMATIC);
-            docModel.set_page_layout(EvView.PageLayout.AUTOMATIC);
-            this._toolbar.setModel(docModel);
-            this._previewEv.setModel(docModel);
-            this._previewEv.grab_focus();
-        }
-
         this._clearLoadTimer();
         this._spinner.stop();
 
-        //FIXME we need to select the preview widget better
-        if (doc != null && docModel == null)
-            this._stack.set_visible_child_name('preview-lok');
-        else
+        switch (doc.viewType) {
+        case Documents.ViewType.EV:
+            if (docModel) {
+                if (Application.application.isBooks)
+                    docModel.set_sizing_mode(EvView.SizingMode.FIT_PAGE);
+                else
+                    docModel.set_sizing_mode(EvView.SizingMode.AUTOMATIC);
+                docModel.set_page_layout(EvView.PageLayout.AUTOMATIC);
+                this._toolbar.setModel(docModel);
+                this._previewEv.setModel(docModel);
+                this._previewEv.grab_focus();
+            }
             this._stack.set_visible_child_name('preview-ev');
+            break;
+        case Documents.ViewType.LOK:
+            this._stack.set_visible_child_name('preview-lok');
+            break;
+        case Documents.ViewType.UNSET:
+        default:
+            log('Something bad happened and the document type is unset');
+            break;
+        }
     },
 
     _onLoadError: function(manager, doc, message, exception) {
diff --git a/src/lokview.js b/src/lokview.js
index d133bd5..ae18dac 100644
--- a/src/lokview.js
+++ b/src/lokview.js
@@ -136,8 +136,6 @@ const LOKView = new Lang.Class({
                                             Lang.bind(this, this._onLoadStarted));
         Application.documentManager.connect('load-error',
                                             Lang.bind(this, this._onLoadError));
-        Application.documentManager.connect('load-finished',
-                                            Lang.bind(this, this._onLoadFinished));
 
         this.connect('destroy', Lang.bind(this,
            function() {
@@ -147,6 +145,8 @@ const LOKView = new Lang.Class({
     },
 
     _onLoadStarted: function(manager, doc) {
+        if (doc.viewType != Documents.ViewType.LOK)
+            return;
         let file = Gio.File.new_for_uri (doc.uri);
         let location = file.get_path();
         this._doc = doc;
@@ -155,6 +155,8 @@ const LOKView = new Lang.Class({
     },
 
     _onLoadError: function(manager, doc, message, exception) {
+        if (doc.viewType != Documents.ViewType.LOK)
+            return;
         //FIXME we should hide controls
         this._setError(message, exception.message);
     },
@@ -175,9 +177,6 @@ const LOKView = new Lang.Class({
         this.view.set_edit(false);
     },
 
-    _onLoadFinished: function(manager, doc, docModel) {
-    },
-
     reset: function () {
         if (!this.view)
             return;
diff --git a/src/preview.js b/src/preview.js
index 12ebecb..c7804bc 100644
--- a/src/preview.js
+++ b/src/preview.js
@@ -43,6 +43,7 @@ const Utils = imports.utils;
 const View = imports.view;
 const WindowMode = imports.windowMode;
 const Presentation = imports.presentation;
+const Documents = imports.documents;
 
 const _FULLSCREEN_TOOLBAR_TIMEOUT = 2; // seconds
 
@@ -172,13 +173,17 @@ const PreviewView = new Lang.Class({
             }));
     },
 
-    _onLoadStarted: function() {
+    _onLoadStarted: function(manager, doc) {
+        if (doc.viewType != Documents.ViewType.EV)
+            return;
         this._bookmarkPage.enabled = false;
         this._places.enabled = false;
         this._copy.enabled = false;
     },
 
     _onLoadError: function(manager, doc, message, exception) {
+        if (doc.viewType != Documents.ViewType.EV)
+            return;
         this._controlsVisible = true;
         this._syncControlsVisible();
         this._setError(message, exception.message);