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Create jspdf\jspdf.js
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‎jspdf/jspdf\jspdf.js‎

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/**
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* jsPDF
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* (c) 2009 James Hall
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*
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* Some parts based on FPDF.
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*/
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var jsPDF = function(){
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// Private properties
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var version = '20090504';
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var buffer = '';
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var pdfVersion = '1.3'; // PDF Version
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var defaultPageFormat = 'a4';
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var pageFormats = { // Size in mm of various paper formats
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'a3': [841.89, 1190.55],
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'a4': [595.28, 841.89],
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'a5': [420.94, 595.28],
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'letter': [612, 792],
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'legal': [612, 1008]
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};
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var textColor = '0 g';
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var page = 0;
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var objectNumber = 2; // 'n' Current object number
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var state = 0; // Current document state
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var pages = new Array();
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var offsets = new Array(); // List of offsets
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var lineWidth = 0.200025; // 2mm
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var pageHeight;
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var k; // Scale factor
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var unit = 'mm'; // Default to mm for units
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var fontNumber; // TODO: This is temp, replace with real font handling
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var documentProperties = {};
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var fontSize = 16; // Default font size
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var pageFontSize = 16;
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// Initilisation
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if (unit == 'pt') {
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k = 1;
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} else if(unit == 'mm') {
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k = 72/25.4;
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} else if(unit == 'cm') {
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k = 72/2.54;
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} else if(unit == 'in') {
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k = 72;
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}
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// Private functions
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var newObject = function() {
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//Begin a new object
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objectNumber ++;
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offsets[objectNumber] = buffer.length;
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out(objectNumber + ' 0 obj');
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}
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var putHeader = function() {
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out('%PDF-' + pdfVersion);
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}
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var putPages = function() {
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// TODO: Fix, hardcoded to a4 portrait
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var wPt = pageWidth * k;
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var hPt = pageHeight * k;
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for(n=1; n <= page; n++) {
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newObject();
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out('<</Type /Page');
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out('/Parent 1 0 R');
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out('/Resources 2 0 R');
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out('/Contents ' + (objectNumber + 1) + ' 0 R>>');
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out('endobj');
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//Page content
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p = pages[n];
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newObject();
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out('<</Length ' + p.length + '>>');
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putStream(p);
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out('endobj');
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}
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offsets[1] = buffer.length;
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out('1 0 obj');
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out('<</Type /Pages');
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var kids='/Kids [';
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for (i = 0; i < page; i++) {
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kids += (3 + 2 * i) + ' 0 R ';
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}
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out(kids + ']');
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out('/Count ' + page);
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out(sprintf('/MediaBox [0 0 %.2f %.2f]', wPt, hPt));
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out('>>');
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out('endobj');
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}
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var putStream = function(str) {
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out('stream');
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out(str);
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out('endstream');
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}
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var putResources = function() {
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putFonts();
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putImages();
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//Resource dictionary
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offsets[2] = buffer.length;
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out('2 0 obj');
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out('<<');
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putResourceDictionary();
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out('>>');
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out('endobj');
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}
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var putFonts = function() {
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// TODO: Only supports core font hardcoded to Helvetica
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newObject();
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fontNumber = objectNumber;
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name = 'Helvetica';
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out('<</Type /Font');
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out('/BaseFont /' + name);
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out('/Subtype /Type1');
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out('/Encoding /WinAnsiEncoding');
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out('>>');
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out('endobj');
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}
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var putImages = function() {
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// TODO
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}
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var putResourceDictionary = function() {
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out('/ProcSet [/PDF /Text /ImageB /ImageC /ImageI]');
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out('/Font <<');
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// Do this for each font, the '1' bit is the index of the font
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// fontNumber is currently the object number related to 'putFonts'
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out('/F1 ' + fontNumber + ' 0 R');
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out('>>');
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out('/XObject <<');
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putXobjectDict();
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out('>>');
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}
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var putXobjectDict = function() {
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// TODO
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// Loop through images
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}
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var putInfo = function() {
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out('/Producer (jsPDF ' + version + ')');
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if(documentProperties.title != undefined) {
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out('/Title (' + pdfEscape(documentProperties.title) + ')');
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}
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if(documentProperties.subject != undefined) {
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out('/Subject (' + pdfEscape(documentProperties.subject) + ')');
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}
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if(documentProperties.author != undefined) {
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out('/Author (' + pdfEscape(documentProperties.author) + ')');
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}
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if(documentProperties.keywords != undefined) {
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out('/Keywords (' + pdfEscape(documentProperties.keywords) + ')');
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}
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if(documentProperties.creator != undefined) {
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out('/Creator (' + pdfEscape(documentProperties.creator) + ')');
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}
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var created = new Date();
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var year = created.getFullYear();
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var month = (created.getMonth() + 1);
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var day = created.getDate();
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var hour = created.getHours();
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var minute = created.getMinutes();
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var second = created.getSeconds();
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out('/CreationDate (D:' + sprintf('%02d%02d%02d%02d%02d%02d', year, month, day, hour, minute, second) + ')');
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}
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var putCatalog = function () {
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out('/Type /Catalog');
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out('/Pages 1 0 R');
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// TODO: Add zoom and layout modes
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out('/OpenAction [3 0 R /FitH null]');
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out('/PageLayout /OneColumn');
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}
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function putTrailer() {
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out('/Size ' + (objectNumber + 1));
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out('/Root ' + objectNumber + ' 0 R');
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out('/Info ' + (objectNumber - 1) + ' 0 R');
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}
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var endDocument = function() {
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state = 1;
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putHeader();
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putPages();
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putResources();
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//Info
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newObject();
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out('<<');
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putInfo();
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out('>>');
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out('endobj');
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//Catalog
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newObject();
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out('<<');
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putCatalog();
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out('>>');
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out('endobj');
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//Cross-ref
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var o = buffer.length;
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out('xref');
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out('0 ' + (objectNumber + 1));
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out('0000000000 65535 f ');
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for (var i=1; i <= objectNumber; i++) {
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out(sprintf('%010d 00000 n ', offsets[i]));
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}
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//Trailer
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out('trailer');
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out('<<');
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putTrailer();
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out('>>');
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out('startxref');
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out(o);
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out('%%EOF');
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state = 3;
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}
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var beginPage = function() {
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page ++;
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// Do dimension stuff
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state = 2;
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pages[page] = '';
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// TODO: Hardcoded at A4 and portrait
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pageHeight = pageFormats['a4'][1] / k;
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pageWidth = pageFormats['a4'][0] / k;
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}
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var out = function(string) {
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if(state == 2) {
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pages[page] += string + '\n';
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} else {
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buffer += string + '\n';
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}
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}
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var _addPage = function() {
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beginPage();
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// Set line width
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out(sprintf('%.2f w', (lineWidth * k)));
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// Set font - TODO
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// 16 is the font size
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pageFontSize = fontSize;
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out('BT /F1 ' + parseInt(fontSize) + '.00 Tf ET');
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}
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// Add the first page automatically
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_addPage();
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// Escape text
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var pdfEscape = function(text) {
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return text.replace(/\\/g, '\\\\').replace(/\(/g, '\\(').replace(/\)/g, '\\)');
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}
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return {
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addPage: function() {
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_addPage();
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},
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text: function(x, y, text) {
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// need page height
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if(pageFontSize != fontSize) {
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out('BT /F1 ' + parseInt(fontSize) + '.00 Tf ET');
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pageFontSize = fontSize;
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}
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var str = sprintf('BT %.2f %.2f Td (%s) Tj ET', x * k, (pageHeight - y) * k, pdfEscape(text));
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out(str);
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},
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setProperties: function(properties) {
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documentProperties = properties;
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},
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addImage: function(imageData, format, x, y, w, h) {
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},
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output: function(type, options) {
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endDocument();
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if(type == undefined) {
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return buffer;
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}
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if(type == 'datauri') {
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document.location.href = 'data:application/pdf;base64,' + Base64.encode(buffer);
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}
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// @TODO: Add different output options
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},
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setFontSize: function(size) {
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fontSize = size;
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}
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}
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};

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