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Fixing inheritable forms input control properties

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notmasteryet 2011-11-12 15:39:23 -06:00
parent 1c18d054d5
commit 1d8a40b372
1 changed files with 40 additions and 13 deletions
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53
src/core.js
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@ -274,11 +274,22 @@ var Page = (function pagePage() {
},
getAnnotations: function pageGetAnnotations() {
var xref = this.xref;
function getInheritableProperty(annotation, name) {
var item = annotation;
while (item && !item.has(name)) {
item = xref.fetchIfRef(item.get('Parent'));
}
if (!item)
return null;
return item.get(name);
}
var annotations = xref.fetchIfRef(this.annotations) || [];
var i, n = annotations.length;
var items = [];
for (i = 0; i < n; ++i) {
var annotation = xref.fetch(annotations[i]);
var annotationRef = annotations[i];
var annotation = xref.fetch(annotationRef);
if (!isDict(annotation))
continue;
var subtype = annotation.get('Subtype');
@ -315,30 +326,46 @@ var Page = (function pagePage() {
}
break;
case 'Widget':
var fieldType = annotation.get('FT');
var fieldType = getInheritableProperty(annotation, 'FT');
if (!isName(fieldType))
break;
item.fieldType = fieldType.name;
// Building the full field name by collecting the field and
// its ancestors 'T' properties and joining them using '.'.
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'));
var namedItem = annotation, ref = annotationRef;
while (namedItem) {
var parentRef = namedItem.get('Parent');
var parent = xref.fetchIfRef(parentRef);
var name = namedItem.get('T');
if (name)
fieldName.unshift(name);
parent = xref.fetchIfRef(parent.get('Parent'));
fieldName.unshift(stringToPDFString(name));
else {
// The field name is absent, that means more than one field
// with the same name may exist. Replacing the empty name
// with the '`' plus index in the parent's 'Kids' array.
// This is not in the PDF spec but necessary to id the
// the input controls.
var kids = xref.fetchIfRef(parent.get('Kids'));
var j, jj;
for (j = 0, jj = kids.length; j < jj; j++) {
if (kids[j].num == ref.num && kids[j].gen == ref.gen)
break;
}
fieldName.unshift('`' + j);
}
namedItem = parent;
ref = parentRef;
}
item.fullName = fieldName.join('.');
var alternativeText = stringToPDFString(annotation.get('TU') || '');
item.alternativeText = alternativeText;
var da = annotation.get('DA') || '';
var da = getInheritableProperty(annotation, 'DA') || '';
var m = /([\d\.]+)\sTf/.exec(da);
if (m)
item.fontSize = parseFloat(m[1]);
item.textAlignment = annotation.get('Q');
item.flags = annotation.get('Ff') || 0;
item.textAlignment = getInheritableProperty(annotation, 'Q');
item.flags = getInheritableProperty(annotation, 'Ff') || 0;
break;
}
items.push(item);