From 13ec738798b8f4c88a0fcd8234f99b09b7928be6 Mon Sep 17 00:00:00 2001
From: Pdf Bot <pdfjsbot@gmail.com>
Date: Thu, 5 Nov 2015 16:52:09 +0000
Subject: [PATCH] PDF.js version 1.2.68 - See
 mozilla/pdf.js@8079bdddb9bfc2c8f9050bdd3486db9bdb4e7871

---
 bower.json            |  2 +-
 build/pdf.combined.js |  4 ++--
 build/pdf.js          |  4 ++--
 build/pdf.worker.js   |  4 ++--
 package.json          |  2 +-
 web/pdf_viewer.css    | 18 ++++++++++++++++++
 web/pdf_viewer.js     | 41 ++++++++++++++++++++++++++++++++++++++++-
 7 files changed, 66 insertions(+), 9 deletions(-)

diff --git a/bower.json b/bower.json
index 82cb9d053..a7a172cea 100644
--- a/bower.json
+++ b/bower.json
@@ -1,6 +1,6 @@
 {
   "name": "pdfjs-dist",
-  "version": "1.2.66",
+  "version": "1.2.68",
   "main": [
     "build/pdf.js",
     "build/pdf.worker.js"
diff --git a/build/pdf.combined.js b/build/pdf.combined.js
index 55fcb0554..0c15e9a26 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 = '1.2.66';
-PDFJS.build = 'c05416f';
+PDFJS.version = '1.2.68';
+PDFJS.build = '8079bdd';
 
 (function pdfjsWrapper() {
   // Use strict in our context only - users might not want it
diff --git a/build/pdf.js b/build/pdf.js
index 846b3657d..b21eb56c5 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 = '1.2.66';
-PDFJS.build = 'c05416f';
+PDFJS.version = '1.2.68';
+PDFJS.build = '8079bdd';
 
 (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 316716d57..48f6ec990 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 = '1.2.66';
-PDFJS.build = 'c05416f';
+PDFJS.version = '1.2.68';
+PDFJS.build = '8079bdd';
 
 (function pdfjsWrapper() {
   // Use strict in our context only - users might not want it
diff --git a/package.json b/package.json
index 8ca12fcff..585db650f 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "pdfjs-dist",
-  "version": "1.2.66",
+  "version": "1.2.68",
   "description": "Generic build of Mozilla's PDF.js library.",
   "keywords": [
     "Mozilla",
diff --git a/web/pdf_viewer.css b/web/pdf_viewer.css
index 73026813b..c14d0a6b3 100644
--- a/web/pdf_viewer.css
+++ b/web/pdf_viewer.css
@@ -62,6 +62,24 @@
 .textLayer ::selection { background: rgb(0,0,255); }
 .textLayer ::-moz-selection { background: rgb(0,0,255); }
 
+.textLayer .endOfContent {
+  display: block;
+  position: absolute;
+  left: 0px;
+  top: 100%;
+  right: 0px;
+  bottom: 0px;
+  z-index: -1;
+  cursor: default;
+  -webkit-user-select: none;
+  -ms-user-select: none;
+  -moz-user-select: none;
+}
+
+.textLayer .endOfContent.active {
+  top: 0px;
+}
+
 
 .annotationLayer .annotLink > a:hover {
   opacity: 0.2;
diff --git a/web/pdf_viewer.js b/web/pdf_viewer.js
index 384913b50..f41e3fb38 100644
--- a/web/pdf_viewer.js
+++ b/web/pdf_viewer.js
@@ -1506,12 +1506,17 @@ var TextLayerBuilder = (function TextLayerBuilderClosure() {
     this.viewport = options.viewport;
     this.textDivs = [];
     this.findController = options.findController || null;
+    this._bindMouse();
   }
 
   TextLayerBuilder.prototype = {
     _finishRendering: function TextLayerBuilder_finishRendering() {
       this.renderingDone = true;
 
+      var endOfContent = document.createElement('div');
+      endOfContent.className = 'endOfContent';
+      this.textLayerDiv.appendChild(endOfContent);
+
       var event = document.createEvent('CustomEvent');
       event.initCustomEvent('textlayerrendered', true, true, {
         pageNumber: this.pageNumber
@@ -1847,7 +1852,41 @@ var TextLayerBuilder = (function TextLayerBuilderClosure() {
       this.matches = this.convertMatches(this.findController === null ?
         [] : (this.findController.pageMatches[this.pageIdx] || []));
       this.renderMatches(this.matches);
-    }
+    },
+
+    /**
+     * Fixes text selection: adds additional div where mouse was clicked.
+     * This reduces flickering of the content if mouse slowly dragged down/up.
+     * @private
+     */
+    _bindMouse: function TextLayerBuilder_bindMouse() {
+      var div = this.textLayerDiv;
+      div.addEventListener('mousedown', function (e) {
+        var end = div.querySelector('.endOfContent');
+        if (!end) {
+          return;
+        }
+        // On non-Firefox browsers, the selection will feel better if the height
+        // of the endOfContent div will be adjusted to start at mouse click
+        // location -- this will avoid flickering when selections moves up.
+        // However it does not work when selection started on empty space.
+        var adjustTop = e.target !== div;
+        if (adjustTop) {
+          var divBounds = div.getBoundingClientRect();
+          var r = Math.max(0, (e.pageY - divBounds.top) / divBounds.height);
+          end.style.top = (r * 100).toFixed(2) + '%';
+        }
+        end.classList.add('active');
+      });
+      div.addEventListener('mouseup', function (e) {
+        var end = div.querySelector('.endOfContent');
+        if (!end) {
+          return;
+        }
+        end.style.top = '';
+        end.classList.remove('active');
+      });
+    },
   };
   return TextLayerBuilder;
 })();