243 lines
6.7 KiB
JavaScript
243 lines
6.7 KiB
JavaScript
/**
|
|
* jsPDF Outline PlugIn
|
|
* Copyright (c) 2014 Steven Spungin (TwelveTone LLC) steven@twelvetone.tv
|
|
*
|
|
* Licensed under the MIT License.
|
|
* http://opensource.org/licenses/mit-license
|
|
*/
|
|
|
|
/**
|
|
* Generates a PDF Outline
|
|
*/
|
|
;
|
|
(function(jsPDFAPI) {
|
|
'use strict';
|
|
|
|
jsPDFAPI.events.push([
|
|
'postPutResources', function() {
|
|
var pdf = this;
|
|
var rx = /^(\d+) 0 obj$/;
|
|
|
|
// Write action goto objects for each page
|
|
// this.outline.destsGoto = [];
|
|
// for (var i = 0; i < totalPages; i++) {
|
|
// var id = pdf.internal.newObject();
|
|
// this.outline.destsGoto.push(id);
|
|
// pdf.internal.write("<</D[" + (i * 2 + 3) + " 0 R /XYZ null
|
|
// null null]/S/GoTo>> endobj");
|
|
// }
|
|
//
|
|
// for (var i = 0; i < dests.length; i++) {
|
|
// pdf.internal.write("(page_" + (i + 1) + ")" + dests[i] + " 0
|
|
// R");
|
|
// }
|
|
//
|
|
if (this.outline.root.children.length > 0) {
|
|
var lines = pdf.outline.render().split(/\r\n/);
|
|
for (var i = 0; i < lines.length; i++) {
|
|
var line = lines[i];
|
|
var m = rx.exec(line);
|
|
if (m != null) {
|
|
var oid = m[1];
|
|
pdf.internal.newObjectDeferredBegin(oid);
|
|
}
|
|
pdf.internal.write(line);
|
|
}
|
|
}
|
|
|
|
// This code will write named destination for each page reference
|
|
// (page_1, etc)
|
|
if (this.outline.createNamedDestinations) {
|
|
var totalPages = this.internal.pages.length;
|
|
// WARNING: this assumes jsPDF starts on page 3 and pageIDs
|
|
// follow 5, 7, 9, etc
|
|
// Write destination objects for each page
|
|
var dests = [];
|
|
for (var i = 0; i < totalPages; i++) {
|
|
var id = pdf.internal.newObject();
|
|
dests.push(id);
|
|
var info = pdf.internal.getPageInfo(i+1);
|
|
pdf.internal.write("<< /D[" + info.objId + " 0 R /XYZ null null null]>> endobj");
|
|
}
|
|
|
|
// assign a name for each destination
|
|
var names2Oid = pdf.internal.newObject();
|
|
pdf.internal.write('<< /Names [ ');
|
|
for (var i = 0; i < dests.length; i++) {
|
|
pdf.internal.write("(page_" + (i + 1) + ")" + dests[i] + " 0 R");
|
|
}
|
|
pdf.internal.write(' ] >>', 'endobj');
|
|
|
|
// var kids = pdf.internal.newObject();
|
|
// pdf.internal.write('<< /Kids [ ' + names2Oid + ' 0 R');
|
|
// pdf.internal.write(' ] >>', 'endobj');
|
|
|
|
var namesOid = pdf.internal.newObject();
|
|
pdf.internal.write('<< /Dests ' + names2Oid + " 0 R");
|
|
pdf.internal.write('>>', 'endobj');
|
|
}
|
|
|
|
}
|
|
]);
|
|
|
|
jsPDFAPI.events.push([
|
|
'putCatalog', function() {
|
|
var pdf = this;
|
|
if (pdf.outline.root.children.length > 0) {
|
|
pdf.internal.write("/Outlines", this.outline.makeRef(this.outline.root));
|
|
if (this.outline.createNamedDestinations) {
|
|
pdf.internal.write("/Names " + namesOid + " 0 R");
|
|
}
|
|
// Open with Bookmarks showing
|
|
// pdf.internal.write("/PageMode /UseOutlines");
|
|
}
|
|
}
|
|
]);
|
|
|
|
jsPDFAPI.events.push([
|
|
'initialized', function() {
|
|
var pdf = this;
|
|
|
|
pdf.outline = {
|
|
createNamedDestinations : false,
|
|
root : {
|
|
children : []
|
|
}
|
|
};
|
|
|
|
var namesOid;
|
|
var destsGoto = [];
|
|
|
|
/**
|
|
* Options: pageNumber
|
|
*/
|
|
pdf.outline.add = function(parent,title,options) {
|
|
var item = {
|
|
title : title,
|
|
options : options,
|
|
children : []
|
|
};
|
|
if (parent == null) {
|
|
parent = this.root;
|
|
}
|
|
parent.children.push(item);
|
|
return item;
|
|
}
|
|
|
|
pdf.outline.render = function() {
|
|
this.ctx = {};
|
|
this.ctx.val = '';
|
|
this.ctx.pdf = pdf;
|
|
|
|
this.genIds_r(this.root);
|
|
this.renderRoot(this.root);
|
|
this.renderItems(this.root);
|
|
|
|
return this.ctx.val;
|
|
};
|
|
|
|
pdf.outline.genIds_r = function(node) {
|
|
node.id = pdf.internal.newObjectDeferred();
|
|
for (var i = 0; i < node.children.length; i++) {
|
|
this.genIds_r(node.children[i]);
|
|
}
|
|
};
|
|
|
|
pdf.outline.renderRoot = function(node) {
|
|
this.objStart(node);
|
|
this.line('/Type /Outlines');
|
|
if (node.children.length > 0) {
|
|
this.line('/First ' + this.makeRef(node.children[0]));
|
|
this.line('/Last ' + this.makeRef(node.children[node.children.length - 1]));
|
|
}
|
|
this.line('/Count ' + this.count_r({
|
|
count : 0
|
|
}, node));
|
|
this.objEnd();
|
|
};
|
|
|
|
pdf.outline.renderItems = function(node) {
|
|
for (var i = 0; i < node.children.length; i++) {
|
|
var item = node.children[i];
|
|
this.objStart(item);
|
|
|
|
this.line('/Title ' + this.makeString(item.title));
|
|
|
|
this.line('/Parent ' + this.makeRef(node));
|
|
if (i > 0) {
|
|
this.line('/Prev ' + this.makeRef(node.children[i - 1]));
|
|
}
|
|
if (i < node.children.length - 1) {
|
|
this.line('/Next ' + this.makeRef(node.children[i + 1]));
|
|
}
|
|
if (item.children.length > 0) {
|
|
this.line('/First ' + this.makeRef(item.children[0]));
|
|
this.line('/Last ' + this.makeRef(item.children[item.children.length - 1]));
|
|
}
|
|
|
|
var count = this.count = this.count_r({
|
|
count : 0
|
|
}, item);
|
|
if (count > 0) {
|
|
this.line('/Count ' + count);
|
|
}
|
|
|
|
if (item.options) {
|
|
if (item.options.pageNumber) {
|
|
// Explicit Destination
|
|
//WARNING this assumes page ids are 3,5,7, etc.
|
|
var info = pdf.internal.getPageInfo(item.options.pageNumber)
|
|
this.line('/Dest ' + '[' + info.objId + ' 0 R /XYZ 0 ' + this.ctx.pdf.internal.pageSize.height + ' 0]');
|
|
// this line does not work on all clients (pageNumber instead of page ref)
|
|
//this.line('/Dest ' + '[' + (item.options.pageNumber - 1) + ' /XYZ 0 ' + this.ctx.pdf.internal.pageSize.height + ' 0]');
|
|
|
|
// Named Destination
|
|
// this.line('/Dest (page_' + (item.options.pageNumber) + ')');
|
|
|
|
// Action Destination
|
|
// var id = pdf.internal.newObject();
|
|
// pdf.internal.write('<</D[' + (item.options.pageNumber - 1) + ' /XYZ null null null]/S/GoTo>> endobj');
|
|
// this.line('/A ' + id + ' 0 R' );
|
|
}
|
|
}
|
|
this.objEnd();
|
|
}
|
|
for (var i = 0; i < node.children.length; i++) {
|
|
var item = node.children[i];
|
|
this.renderItems(item);
|
|
}
|
|
};
|
|
|
|
pdf.outline.line = function(text) {
|
|
this.ctx.val += text + '\r\n';
|
|
};
|
|
|
|
pdf.outline.makeRef = function(node) {
|
|
return node.id + ' 0 R';
|
|
};
|
|
|
|
pdf.outline.makeString = function(val) {
|
|
return '(' + pdf.internal.pdfEscape(val) + ')';
|
|
};
|
|
|
|
pdf.outline.objStart = function(node) {
|
|
this.ctx.val += '\r\n' + node.id + ' 0 obj' + '\r\n<<\r\n';
|
|
};
|
|
|
|
pdf.outline.objEnd = function(node) {
|
|
this.ctx.val += '>> \r\n' + 'endobj' + '\r\n';
|
|
};
|
|
|
|
pdf.outline.count_r = function(ctx,node) {
|
|
for (var i = 0; i < node.children.length; i++) {
|
|
ctx.count++;
|
|
this.count_r(ctx, node.children[i]);
|
|
}
|
|
return ctx.count;
|
|
};
|
|
}
|
|
]);
|
|
|
|
return this;
|
|
})(jsPDF.API);
|