yetangitu/pdf.js
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Implemented support for opening files from the local file system using the HTML5 File API.

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This commit is contained in:
Justin D'Arcangelo 2011-06-21 22:15:13 -04:00
parent 8bf617c844
commit 24e541e9de
5 changed files with 144 additions and 19 deletions
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98
multi-page-viewer.js
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@ -12,6 +12,7 @@ var PDFViewer = {
nextPageButton: null,
pageNumberInput: null,
scaleSelect: null,
fileInput: null,
willJumpToPage: false,
@ -215,7 +216,7 @@ var PDFViewer = {
}
},
open: function(url) {
openURL: function(url) {
PDFViewer.url = url;
document.title = url;
@ -231,26 +232,35 @@ var PDFViewer = {
req.responseArrayBuffer ||
req.response;
PDFViewer.pdf = new PDFDoc(new Stream(data));
PDFViewer.numberOfPages = PDFViewer.pdf.numPages;
document.getElementById('numPages').innerHTML = PDFViewer.numberOfPages.toString();
for (var i = 1; i <= PDFViewer.numberOfPages; i++) {
PDFViewer.createPage(i);
}
if (PDFViewer.numberOfPages > 0) {
PDFViewer.drawPage(1);
}
PDFViewer.previousPageButton.className = (PDFViewer.pageNumber === 1) ?
'disabled' : '';
PDFViewer.nextPageButton.className = (PDFViewer.pageNumber === PDFViewer.numberOfPages) ?
'disabled' : '';
PDFViewer.readPDF(data);
}
};
req.send(null);
},
readPDF: function(data) {
while (PDFViewer.element.hasChildNodes()) {
PDFViewer.element.removeChild(PDFViewer.element.firstChild);
}
PDFViewer.pdf = new PDFDoc(new Stream(data));
PDFViewer.numberOfPages = PDFViewer.pdf.numPages;
document.getElementById('numPages').innerHTML = PDFViewer.numberOfPages.toString();
for (var i = 1; i <= PDFViewer.numberOfPages; i++) {
PDFViewer.createPage(i);
}
if (PDFViewer.numberOfPages > 0) {
PDFViewer.drawPage(1);
document.location.hash = 1;
}
PDFViewer.previousPageButton.className = (PDFViewer.pageNumber === 1) ?
'disabled' : '';
PDFViewer.nextPageButton.className = (PDFViewer.pageNumber === PDFViewer.numberOfPages) ?
'disabled' : '';
}
};
@ -354,11 +364,63 @@ window.onload = function() {
PDFViewer.scaleSelect.onchange = function(evt) {
PDFViewer.changeScale(parseInt(this.value));
};
if (window.File && window.FileReader && window.FileList && window.Blob) {
var openFileButton = document.getElementById('openFileButton');
openFileButton.onclick = function(evt) {
if (this.className.indexOf('disabled') === -1) {
PDFViewer.fileInput.click();
}
};
openFileButton.onmousedown = function(evt) {
if (this.className.indexOf('disabled') === -1) {
this.className = 'down';
}
};
openFileButton.onmouseup = function(evt) {
this.className = (this.className.indexOf('disabled') !== -1) ? 'disabled' : '';
};
openFileButton.onmouseout = function(evt) {
this.className = (this.className.indexOf('disabled') !== -1) ? 'disabled' : '';
};
PDFViewer.fileInput = document.getElementById('fileInput');
PDFViewer.fileInput.onchange = function(evt) {
var files = evt.target.files;
if (files.length > 0) {
var file = files[0];
var fileReader = new FileReader();
document.title = file.name;
// Read the local file into a Uint8Array.
fileReader.onload = function(evt) {
var data = evt.target.result;
var buffer = new ArrayBuffer(data.length);
var uint8Array = new Uint8Array(buffer);
for (var i = 0; i < data.length; i++) {
uint8Array[i] = data.charCodeAt(i);
}
PDFViewer.readPDF(uint8Array);
};
// Read as a binary string since "readAsArrayBuffer" is not yet
// implemented in Firefox.
fileReader.readAsBinaryString(file);
}
};
PDFViewer.fileInput.value = null;
} else {
document.getElementById('fileWrapper').style.display = 'none';
}
PDFViewer.pageNumber = parseInt(PDFViewer.queryParams.page) || PDFViewer.pageNumber;
PDFViewer.scale = parseInt(PDFViewer.scaleSelect.value) / 100 || 1.0;
PDFViewer.open(PDFViewer.queryParams.file || PDFViewer.url);
PDFViewer.openURL(PDFViewer.queryParams.file || PDFViewer.url);
window.onscroll = function(evt) {
var lastPagesDrawn = PDFViewer.lastPagesDrawn;