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Button widget annotations: implement radio button value fetching according to the specification

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This commit is contained in:
Tim van der Meij 2016-12-15 22:58:27 +01:00
parent 0c9a06c020
commit 77148c7880
1 changed files with 32 additions and 14 deletions
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46
src/core/annotation.js
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@ -776,24 +776,42 @@ var ButtonWidgetAnnotation = (function ButtonWidgetAnnotationClosure() {
this.data.pushbutton = this.hasFieldFlag(AnnotationFieldFlag.PUSHBUTTON);
this.data.radio = !this.data.pushbutton &&
this.hasFieldFlag(AnnotationFieldFlag.RADIO);
if (isName(this.data.fieldValue)) {
this.data.fieldValue = this.data.fieldValue.name;
} else {
warn('Button widget annotation: field value is not a `Name` object.');
}
// Get the value of the radio button
if (this.data.radio) {
// Generate a unique ID in case no value is found
this.data.buttonValue = Math.random().toString(16).slice(2);
var appearanceState = params.dict.get('AP');
if (isDict(appearanceState)) {
var appearances = appearanceState.get('N');
if (isDict(appearances) && appearances.has('Off')) {
var keys = appearances.getKeys();
for (var i = 0, ii = keys.length; i < ii; i++) {
if (keys[i] !== 'Off') {
this.data.buttonValue = keys[i];
break;
}
}
this.data.fieldValue = this.data.buttonValue = null;
// The parent field's `V` entry holds a `Name` object with the appearance
// state of whichever child field is currently in the "on" state.
var fieldParent = params.dict.get('Parent');
if (!isDict(fieldParent) || !fieldParent.has('V')) {
return;
}
var fieldParentValue = fieldParent.get('V');
if (!isName(fieldParentValue)) {
return;
}
this.data.fieldValue = fieldParentValue.name;
// The button's value corresponds to its appearance state.
var appearanceStates = params.dict.get('AP');
if (!isDict(appearanceStates)) {
return;
}
var normalAppearanceState = appearanceStates.get('N');
if (!isDict(normalAppearanceState)) {
return;
}
var keys = normalAppearanceState.getKeys();
for (var i = 0, ii = keys.length; i < ii; i++) {
if (keys[i] !== 'Off') {
this.data.buttonValue = keys[i];
break;
}
}
}