Merge pull request #3943 from yurydelendik/issue-3942

Fixes cleaning up of the rendered pages

web/page_view.js

@@ -67,16 +67,12 @@ var PageView = function pageView(container, id, scale,
     }
   };
 
-  this.resetRenderingState = function  pageViewResetRenderingState() {
+  this.reset = function pageViewReset() {
     if (this.renderTask) {
       this.renderTask.cancel();
     }
     this.resume = null;
     this.renderingState = RenderingStates.INITIAL;
-  };
-
-  this.reset = function pageViewReset() {
-    this.resetRenderingState();
 
     div.style.width = Math.floor(this.viewport.width) + 'px';
     div.style.height = Math.floor(this.viewport.height) + 'px';

web/viewer.js

@@ -1065,8 +1065,9 @@ var PDFView = {
 
   cleanup: function pdfViewCleanup() {
     for (var i = 0, ii = this.pages.length; i < ii; i++) {
-      if (this.pages[i]) {
-        this.pages[i].resetRenderingState();
+      if (this.pages[i] &&
+          this.pages[i].renderingState !== RenderingStates.FINISHED) {
+        this.pages[i].reset();
       }
     }
     this.pdfDocument.cleanup();