From fb2d165a488e34a646412615a7cc2aa2e8e82af1 Mon Sep 17 00:00:00 2001
From: notmasteryet <async.processingjs@yahoo.com>
Date: Sun, 11 Dec 2011 19:38:20 -0600
Subject: [PATCH] Simple search results

---
 web/viewer.css  | 40 +++++++++++++++++++-
 web/viewer.html | 10 +++++
 web/viewer.js   | 98 ++++++++++++++++++++++++++++++++++++++++---------
 3 files changed, 130 insertions(+), 18 deletions(-)

diff --git a/web/viewer.css b/web/viewer.css
index a1ef92810..56d513f70 100644
--- a/web/viewer.css
+++ b/web/viewer.css
@@ -172,9 +172,47 @@ span#info {
   box-shadow: 0px 2px 10px #ff0;
 }
 
+#searchScrollView {
+  position: absolute;
+  top: 10px;
+  bottom: 10px;
+  left: 10px;
+  width: 280px;
+}
+
+#searchToolbar {
+  padding-left: 0px;
+  right: 0px;
+  padding-top: 0px;
+  padding-bottom: 5px;
+}
+
+#searchToolbar > input {
+  width: 220px;
+}
+
+#searchResults {
+  overflow: auto;
+  background-color: #fff;
+  position: absolute;
+  top: 30px;
+  bottom: 0px;
+  left: 0px;
+  right: 0;
+  font-size: smaller;
+  opacity: 0.7;
+}
+
+#searchResults a {
+  display: block;
+  white-space: pre;
+  text-decoration: none;
+  color: black;
+}
+
 #sidebarControls {
   position:absolute;
-  width: 120px;
+  width: 180px;
   height: 32px;
   left: 15px;
   bottom: 35px;
diff --git a/web/viewer.html b/web/viewer.html
index 53ca2a247..98c19a53c 100644
--- a/web/viewer.html
+++ b/web/viewer.html
@@ -124,6 +124,13 @@
         <div id="outlineScrollView" hidden='true'>
           <div id="outlineView"></div>
         </div>
+        <div id="searchScrollView" hidden='true'>
+          <div id="searchToolbar">
+            <input id="searchTermsInput" onkeydown='if (event.keyCode == 13) PDFView.search()'>
+            <button id="searchButton" onclick='PDFView.search()'>Find</button>
+          </div>
+          <div id="searchResults"></div>
+        </div>
         <div id="sidebarControls">
           <button id="thumbsSwitch" title="Show Thumbnails" onclick="PDFView.switchSidebarView('thumbs')" data-selected>
             <img src="images/nav-thumbs.svg" align="top" height="16" alt="Thumbs" />
@@ -131,6 +138,9 @@
           <button id="outlineSwitch" title="Show Document Outline" onclick="PDFView.switchSidebarView('outline')" disabled>
             <img src="images/nav-outline.svg" align="top" height="16" alt="Document Outline" />
           </button>
+          <button id="searchSwitch" title="Show Search" onclick="PDFView.switchSidebarView('search')">
+            <img src="images/edit-find.svg" align="top" height="16" alt="Search Document" />
+          </button>
         </div>
      </div>
     </div>
diff --git a/web/viewer.js b/web/viewer.js
index 465df5ab5..340586a94 100644
--- a/web/viewer.js
+++ b/web/viewer.js
@@ -310,18 +310,69 @@ var PDFView = {
     else
       this.page = 1;
 
+    // loosing pdf reference here, starting text indexing in 500ms
     setTimeout((function loadStartTextExtraction() {
       this.startTextExtraction(pdf);
     }).bind(this), 500);
+    delete PDFView.extractedText;
   },
 
-  startTextExtraction: function(pdf) {
+  startTextExtraction: function pdfViewStartTextExtraction(pdf) {
+    var searchResults = document.getElementById('searchResults');
+    searchResults.textContent = '';
+
     pdf.textExtracted = function pdfTextExtracted(index) {
-      console.log(index.join());
+      PDFView.extractedText = index;
     };
     pdf.extractText();
   },
 
+  search: function pdfViewStartSearch() {
+    function bindLink(link, pageNumber) {
+      link.href = '#' + pageNumber;
+      link.onclick = function searchBindLink() {
+        PDFView.page = pageNumber;
+        return false;
+      };
+    }
+
+    var searchResults = document.getElementById('searchResults');
+    if (!('extractedText' in PDFView)) {
+      // not indexed yet, repeat in 1 second
+      searchResults.textContent = 'Searching...';
+      setTimeout(this.search.bind(this), 1000);
+      return;
+    }
+
+    var searchTermsInput = document.getElementById('searchTermsInput');
+    searchResults.removeAttribute('hidden');
+    searchResults.textContent = '';
+
+    var terms = searchTermsInput.value;
+    // simple search: removing spaces and hyphens, then scanning every
+    terms = terms.replace(/\s-/g, '').toLowerCase();
+    var index = PDFView.extractedText;
+    var pageFound = false;
+    for (var i = 0, ii = index.length; i < ii; i++) {
+      var pageText = index[i].replace(/\s-/g, '').toLowerCase();
+      var j = pageText.indexOf(terms);
+      if (j < 0)
+        continue;
+
+      var pageNumber = i + 1;
+      var textSample = index[i].substr(j, 50);
+      var link = document.createElement('a');
+      bindLink(link, pageNumber);
+      link.textContent = 'Page ' + pageNumber + ': ' + textSample;
+      searchResults.appendChild(link);
+
+      pageFound = true;
+    }
+    if (!pageFound) {
+      searchResults.textContent = '(Not found)';
+    }
+  },
+
   setHash: function pdfViewSetHash(hash) {
     if (!hash)
       return;
@@ -361,23 +412,36 @@ var PDFView = {
 
   switchSidebarView: function pdfViewSwitchSidebarView(view) {
     var thumbsScrollView = document.getElementById('sidebarScrollView');
-    var outlineScrollView = document.getElementById('outlineScrollView');
     var thumbsSwitchButton = document.getElementById('thumbsSwitch');
+    if (view == 'thumbs') {
+      thumbsScrollView.removeAttribute('hidden');
+      thumbsSwitchButton.setAttribute('data-selected', true);
+    } else {
+      thumbsScrollView.setAttribute('hidden', 'true');
+      thumbsSwitchButton.removeAttribute('data-selected');
+    }
+
+    var outlineScrollView = document.getElementById('outlineScrollView');
     var outlineSwitchButton = document.getElementById('outlineSwitch');
-    switch (view) {
-      case 'thumbs':
-        thumbsScrollView.removeAttribute('hidden');
-        outlineScrollView.setAttribute('hidden', 'true');
-        thumbsSwitchButton.setAttribute('data-selected', true);
-        outlineSwitchButton.removeAttribute('data-selected');
-        updateThumbViewArea();
-        break;
-      case 'outline':
-        thumbsScrollView.setAttribute('hidden', 'true');
-        outlineScrollView.removeAttribute('hidden');
-        thumbsSwitchButton.removeAttribute('data-selected');
-        outlineSwitchButton.setAttribute('data-selected', true);
-        break;
+    if (view == 'outline') {
+      outlineScrollView.removeAttribute('hidden');
+      outlineSwitchButton.setAttribute('data-selected', true);
+    } else {
+      outlineScrollView.setAttribute('hidden', 'true');
+      outlineSwitchButton.removeAttribute('data-selected');
+    }
+
+    var searchScrollView = document.getElementById('searchScrollView');
+    var searchSwitchButton = document.getElementById('searchSwitch');
+    if (view == 'search') {
+      searchScrollView.removeAttribute('hidden');
+      searchSwitchButton.setAttribute('data-selected', true);
+
+      var searchTermsInput = document.getElementById('searchTermsInput');
+      searchTermsInput.focus();
+    } else {
+      searchScrollView.setAttribute('hidden', 'true');
+      searchSwitchButton.removeAttribute('data-selected');
     }
   },