From 47899636ed1d0e3293daa489c48dcb00f0a995f8 Mon Sep 17 00:00:00 2001
From: Pdf Bot <pdfjsbot@gmail.com>
Date: Fri, 29 May 2015 19:17:33 +0100
Subject: [PATCH] PDF.js version 1.1.177

---
 bower.json            |  2 +-
 build/pdf.combined.js |  4 ++--
 build/pdf.js          |  4 ++--
 build/pdf.worker.js   |  4 ++--
 package.json          |  2 +-
 web/pdf_viewer.js     | 36 ++++++++++++++++++++++++------------
 6 files changed, 32 insertions(+), 20 deletions(-)

diff --git a/bower.json b/bower.json
index 56beddd91..e03d8f870 100644
--- a/bower.json
+++ b/bower.json
@@ -1,6 +1,6 @@
 {
   "name": "pdfjs-dist",
-  "version": "1.1.174",
+  "version": "1.1.177",
   "main": [
     "build/pdf.js",
     "build/pdf.worker.js"
diff --git a/build/pdf.combined.js b/build/pdf.combined.js
index 107d08a83..bbc1e5ac3 100644
--- a/build/pdf.combined.js
+++ b/build/pdf.combined.js
@@ -22,8 +22,8 @@ if (typeof PDFJS === 'undefined') {
   (typeof window !== 'undefined' ? window : this).PDFJS = {};
 }
 
-PDFJS.version = '1.1.174';
-PDFJS.build = '189ef97';
+PDFJS.version = '1.1.177';
+PDFJS.build = 'd3fa65e';
 
 (function pdfjsWrapper() {
   // Use strict in our context only - users might not want it
diff --git a/build/pdf.js b/build/pdf.js
index 6f8ae06be..9ef72c2ae 100644
--- a/build/pdf.js
+++ b/build/pdf.js
@@ -22,8 +22,8 @@ if (typeof PDFJS === 'undefined') {
   (typeof window !== 'undefined' ? window : this).PDFJS = {};
 }
 
-PDFJS.version = '1.1.174';
-PDFJS.build = '189ef97';
+PDFJS.version = '1.1.177';
+PDFJS.build = 'd3fa65e';
 
 (function pdfjsWrapper() {
   // Use strict in our context only - users might not want it
diff --git a/build/pdf.worker.js b/build/pdf.worker.js
index 2f6ec3440..7e7ee6155 100644
--- a/build/pdf.worker.js
+++ b/build/pdf.worker.js
@@ -22,8 +22,8 @@ if (typeof PDFJS === 'undefined') {
   (typeof window !== 'undefined' ? window : this).PDFJS = {};
 }
 
-PDFJS.version = '1.1.174';
-PDFJS.build = '189ef97';
+PDFJS.version = '1.1.177';
+PDFJS.build = 'd3fa65e';
 
 (function pdfjsWrapper() {
   // Use strict in our context only - users might not want it
diff --git a/package.json b/package.json
index 385a6a61c..2e9b4b564 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "pdfjs-dist",
-  "version": "1.1.174",
+  "version": "1.1.177",
   "description": "Generic build of Mozilla's PDF.js library.",
   "keywords": [
     "Mozilla",
diff --git a/web/pdf_viewer.js b/web/pdf_viewer.js
index ec57d5c57..46e7eddcb 100644
--- a/web/pdf_viewer.js
+++ b/web/pdf_viewer.js
@@ -468,12 +468,14 @@ var PDFLinkService = (function () {
     get page() {
       return this.pdfViewer.currentPageNumber;
     },
+
     /**
      * @param {number} value
      */
     set page(value) {
       this.pdfViewer.currentPageNumber = value;
     },
+
     /**
      * @param dest - The PDF destination object.
      */
@@ -492,12 +494,14 @@ var PDFLinkService = (function () {
           }
           self.pdfViewer.scrollPageIntoView(pageNumber, dest);
 
-          // Update the browsing history.
-          self.pdfHistory.push({
-            dest: dest,
-            hash: destString,
-            page: pageNumber
-          });
+          if (self.pdfHistory) {
+            // Update the browsing history.
+            self.pdfHistory.push({
+              dest: dest,
+              hash: destString,
+              page: pageNumber
+            });
+          }
         } else {
           self.pdfDocument.getPageIndex(destRef).then(function (pageIndex) {
             var pageNum = pageIndex + 1;
@@ -576,7 +580,9 @@ var PDFLinkService = (function () {
         var params = parseQueryString(hash);
         // borrowing syntax from "Parameters for Opening PDF Files"
         if ('nameddest' in params) {
-          this.pdfHistory.updateNextHashParam(params.nameddest);
+          if (this.pdfHistory) {
+            this.pdfHistory.updateNextHashParam(params.nameddest);
+          }
           this.navigateTo(params.nameddest);
           return;
         }
@@ -606,7 +612,7 @@ var PDFLinkService = (function () {
                       zoomArgs.length > 1 ? (zoomArgs[1] | 0) : null];
             } else if (zoomArg === 'FitR') {
               if (zoomArgs.length !== 5) {
-                console.error('pdfViewSetHash: ' +
+                console.error('PDFLinkService_setHash: ' +
                               'Not enough parameters for \'FitR\'.');
               } else {
                 dest = [null, { name: zoomArg },
@@ -614,7 +620,7 @@ var PDFLinkService = (function () {
                         (zoomArgs[3] | 0), (zoomArgs[4] | 0)];
               }
             } else {
-              console.error('pdfViewSetHash: \'' + zoomArg +
+              console.error('PDFLinkService_setHash: \'' + zoomArg +
                             '\' is not a valid zoom value.');
             }
           }
@@ -636,7 +642,9 @@ var PDFLinkService = (function () {
       } else if (/^\d+$/.test(hash)) { // page number
         this.page = hash;
       } else { // named destination
-        this.pdfHistory.updateNextHashParam(unescape(hash));
+        if (this.pdfHistory) {
+          this.pdfHistory.updateNextHashParam(unescape(hash));
+        }
         this.navigateTo(unescape(hash));
       }
     },
@@ -648,11 +656,15 @@ var PDFLinkService = (function () {
       // See PDF reference, table 8.45 - Named action
       switch (action) {
         case 'GoBack':
-          this.pdfHistory.back();
+          if (this.pdfHistory) {
+            this.pdfHistory.back();
+          }
           break;
 
         case 'GoForward':
-          this.pdfHistory.forward();
+          if (this.pdfHistory) {
+            this.pdfHistory.forward();
+          }
           break;
 
         case 'NextPage':