From b6edbb38c1eafa35044408bd8eaa2e045d5378a0 Mon Sep 17 00:00:00 2001
From: Yury Delendik <ydelendik@mozilla.com>
Date: Mon, 16 Apr 2012 16:46:26 -0500
Subject: [PATCH] Fixes content stream reset; terminating rendering when
 destroyed

---
 src/api.js  | 9 +++++++--
 src/core.js | 7 +++++--
 2 files changed, 12 insertions(+), 4 deletions(-)

diff --git a/src/api.js b/src/api.js
index 189b94dbe..dfc245b03 100644
--- a/src/api.js
+++ b/src/api.js
@@ -233,6 +233,11 @@ var PDFPageProxy = (function PDFPageProxyClosure() {
       // Once the operatorList and fonts are loaded, do the actual rendering.
       this.displayReadyPromise.then(
         function pageDisplayReadyPromise() {
+          if (self.destroyed) {
+            complete();
+            return;
+          }
+
           var gfx = new CanvasGraphics(params.canvasContext,
             this.objs, params.textLayer);
           try {
@@ -351,8 +356,8 @@ var PDFPageProxy = (function PDFPageProxyClosure() {
       this.destroyed = true;
 
       if (!this.renderInProgress) {
-        delete self.operatorList;
-        delete self.displayReadyPromise;
+        delete this.operatorList;
+        delete this.displayReadyPromise;
       }
     }
   };
diff --git a/src/core.js b/src/core.js
index cbd2abf8d..2734d0eef 100644
--- a/src/core.js
+++ b/src/core.js
@@ -137,10 +137,13 @@ var Page = (function PageClosure() {
       var resources = this.resources;
       if (isArray(content)) {
         // fetching items
+        var streams = [];
         var i, n = content.length;
         for (i = 0; i < n; ++i)
-          content[i] = xref.fetchIfRef(content[i]);
-        content = new StreamsSequenceStream(content);
+          streams.push(xref.fetchIfRef(content[i]));
+        content = new StreamsSequenceStream(streams);
+      } else if (isStream(content)) {
+        content.reset();
       } else if (!content) {
         // replacing non-existent page content with empty one
         content = new Stream(new Uint8Array(0));