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Simple AcroForms support

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notmasteryet 2011-11-02 20:46:39 -05:00
parent 112115c013
commit f3ee85efab
3 changed files with 167 additions and 37 deletions
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90
src/core.js
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@ -265,46 +265,87 @@ var Page = (function pagePage() {
}
},
getLinks: function pageGetLinks() {
var links = [];
var annotations = pageGetAnnotations();
var i, n = annotations.length;
for (i = 0; i < n; ++i) {
if (annotations[i].type != 'Link')
continue;
links.push(annotations[i]);
}
return links;
},
getAnnotations: function pageGetAnnotations() {
var xref = this.xref;
var annotations = xref.fetchIfRef(this.annotations) || [];
var i, n = annotations.length;
var links = [];
var items = [];
for (i = 0; i < n; ++i) {
var annotation = xref.fetch(annotations[i]);
if (!isDict(annotation))
continue;
var subtype = annotation.get('Subtype');
if (!isName(subtype) || subtype.name != 'Link')
if (!isName(subtype))
continue;
var rect = annotation.get('Rect');
var topLeftCorner = this.rotatePoint(rect[0], rect[1]);
var bottomRightCorner = this.rotatePoint(rect[2], rect[3]);
var link = {};
link.x = Math.min(topLeftCorner.x, bottomRightCorner.x);
link.y = Math.min(topLeftCorner.y, bottomRightCorner.y);
link.width = Math.abs(topLeftCorner.x - bottomRightCorner.x);
link.height = Math.abs(topLeftCorner.y - bottomRightCorner.y);
var a = this.xref.fetchIfRef(annotation.get('A'));
if (a) {
switch (a.get('S').name) {
case 'URI':
link.url = a.get('URI');
var item = {};
item.type = subtype.name;
item.x = Math.min(topLeftCorner.x, bottomRightCorner.x);
item.y = Math.min(topLeftCorner.y, bottomRightCorner.y);
item.width = Math.abs(topLeftCorner.x - bottomRightCorner.x);
item.height = Math.abs(topLeftCorner.y - bottomRightCorner.y);
switch (subtype.name) {
case 'Link':
var a = this.xref.fetchIfRef(annotation.get('A'));
if (a) {
switch (a.get('S').name) {
case 'URI':
link.url = a.get('URI');
break;
case 'GoTo':
link.dest = a.get('D');
break;
default:
TODO('other link types');
}
} else if (annotation.has('Dest')) {
// simple destination link
var dest = annotation.get('Dest');
link.dest = isName(dest) ? dest.name : dest;
}
break;
case 'Widget':
var fieldType = annotation.get('FT');
if (!isName(fieldType))
break;
case 'GoTo':
link.dest = a.get('D');
break;
default:
TODO('other link types');
}
} else if (annotation.has('Dest')) {
// simple destination link
var dest = annotation.get('Dest');
link.dest = isName(dest) ? dest.name : dest;
item.fieldType = fieldType.name;
var fieldName = [];
var name = stringToPDFString(annotation.get('T'));
if (name)
fieldName.push(name)
var parent = xref.fetchIfRef(annotation.get('Parent'));
while (parent) {
name = stringToPDFString(parent.get('T'));
if (name)
fieldName.unshift(name);
parent = xref.fetchIfRef(parent.get('Parent'));
}
item.fullName = fieldName.join('.');
var alternativeText = stringToPDFString(annotation.get('TU') || '');
item.alternativeText = alternativeText;
var da = annotation.get('DA') || '';
var m = /([\d\.]+)\sTf/.exec(da);
if (m)
item.fontSize = parseFloat(m[1]);
item.flags = annotation.get('Ff') || 0;
break;
}
links.push(link);
items.push(item);
}
return links;
return items;
},
startRendering: function pageStartRendering(ctx, callback) {
this.ctx = ctx;
@ -342,6 +383,7 @@ var PDFDocModel = (function pdfDoc() {
assertWellFormed(stream.length > 0, 'stream must have data');
this.stream = stream;
this.setup();
this.acroForm = this.xref.fetchIfRef(this.catalog.catDict.get('AcroForm'));
}
function find(stream, needle, limit, backwards) {