Merge pull request #5895 from Snuffleupagus/viewer-pref-init-refactor

Re-factor and clean-up some preference related code in viewer.js

web/viewer.js

@@ -111,6 +111,7 @@ var PDFViewerApplication = {
   preferenceSidebarViewOnLoad: SidebarView.NONE,
   preferencePdfBugEnabled: false,
   preferenceShowPreviousViewOnLoad: true,
+  preferenceDefaultZoomValue: '',
   isViewerEmbedded: (window.parent !== window),
   url: '',
 
@@ -231,9 +232,9 @@ var PDFViewerApplication = {
       }),
       Preferences.get('showPreviousViewOnLoad').then(function resolved(value) {
         self.preferenceShowPreviousViewOnLoad = value;
-        if (!value && window.history.state) {
+      }),
-          window.history.replaceState(null, '');
+      Preferences.get('defaultZoomValue').then(function resolved(value) {
-        }
+        self.preferenceDefaultZoomValue = value;
       }),
       Preferences.get('disableTextLayer').then(function resolved(value) {
         if (PDFJS.disableTextLayer === true) {
@@ -259,7 +260,6 @@ var PDFViewerApplication = {
       Preferences.get('useOnlyCssZoom').then(function resolved(value) {
         PDFJS.useOnlyCssZoom = value;
       })
-
       // TODO move more preferences and other async stuff here
     ]).catch(function (reason) { });
 
@@ -881,33 +881,26 @@ var PDFViewerApplication = {
       if (!PDFJS.disableHistory && !self.isViewerEmbedded) {
         // The browsing history is only enabled when the viewer is standalone,
         // i.e. not when it is embedded in a web page.
+        if (!self.preferenceShowPreviousViewOnLoad && window.history.state) {
+          window.history.replaceState(null, '');
+        }
         PDFHistory.initialize(self.documentFingerprint, self);
       }
-    });
 
-    // Fetch the necessary preference values.
+      store.initializedPromise.then(function resolved() {
-    var defaultZoomValue;
-    var defaultZoomValuePromise =
-      Preferences.get('defaultZoomValue').then(function (prefValue) {
-        defaultZoomValue = prefValue;
-      });
-
-    var storePromise = store.initializedPromise;
-    Promise.all([firstPagePromise, storePromise, defaultZoomValuePromise]).then(
-        function resolved() {
         var storedHash = null;
-      if (PDFViewerApplication.preferenceShowPreviousViewOnLoad &&
+        if (self.preferenceShowPreviousViewOnLoad &&
             store.get('exists', false)) {
           var pageNum = store.get('page', '1');
-        var zoom = defaultZoomValue ||
+          var zoom = self.preferenceDefaultZoomValue ||
                      store.get('zoom', self.pdfViewer.currentScale);
           var left = store.get('scrollLeft', '0');
           var top = store.get('scrollTop', '0');
 
           storedHash = 'page=' + pageNum + '&zoom=' + zoom + ',' +
                        left + ',' + top;
-      } else if (defaultZoomValue) {
+        } else if (self.preferenceDefaultZoomValue) {
-        storedHash = 'page=1&zoom=' + defaultZoomValue;
+          storedHash = 'page=1&zoom=' + self.preferenceDefaultZoomValue;
         }
         self.setInitialView(storedHash, scale);
 
@@ -921,8 +914,6 @@ var PDFViewerApplication = {
         }
       }, function rejected(reason) {
         console.error(reason);
-
-      firstPagePromise.then(function () {
         self.setInitialView(null, scale);
       });
     });