yetangitu/pdf.js
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Simple search results

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notmasteryet 2011-12-11 19:38:20 -06:00
parent 4d44eb6184
commit fb2d165a48
3 changed files with 130 additions and 18 deletions
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98
web/viewer.js
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@ -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');
}
},