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Button widget annotations: implement support for pushbuttons

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This commit is contained in:
Tim van der Meij 2017-11-20 23:00:19 +01:00
parent 6f52fafdc0
commit 0fe80df2a7
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GPG Key ID: 8C3FD2925A5F2762
6 changed files with 100 additions and 39 deletions
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91
src/core/annotation.js
View File

@ -732,45 +732,70 @@ class ButtonWidgetAnnotation extends WidgetAnnotation {
this.data.checkBox = !this.hasFieldFlag(AnnotationFieldFlag.RADIO) &&
!this.hasFieldFlag(AnnotationFieldFlag.PUSHBUTTON);
if (this.data.checkBox) {
if (!isName(this.data.fieldValue)) {
return;
}
this.data.fieldValue = this.data.fieldValue.name;
}
this.data.radioButton = this.hasFieldFlag(AnnotationFieldFlag.RADIO) &&
!this.hasFieldFlag(AnnotationFieldFlag.PUSHBUTTON);
if (this.data.radioButton) {
this.data.fieldValue = this.data.buttonValue = null;
this.data.pushButton = this.hasFieldFlag(AnnotationFieldFlag.PUSHBUTTON);
// The parent field's `V` entry holds a `Name` object with the appearance
// state of whichever child field is currently in the "on" state.
let fieldParent = params.dict.get('Parent');
if (isDict(fieldParent) && fieldParent.has('V')) {
let fieldParentValue = fieldParent.get('V');
if (isName(fieldParentValue)) {
this.data.fieldValue = fieldParentValue.name;
}
}
if (this.data.checkBox) {
this._processCheckBox();
} else if (this.data.radioButton) {
this._processRadioButton(params);
} else if (this.data.pushButton) {
this._processPushButton(params);
} else {
warn('Invalid field flags for button widget annotation');
}
}
// The button's value corresponds to its appearance state.
let appearanceStates = params.dict.get('AP');
if (!isDict(appearanceStates)) {
return;
}
let normalAppearanceState = appearanceStates.get('N');
if (!isDict(normalAppearanceState)) {
return;
}
let keys = normalAppearanceState.getKeys();
for (let i = 0, ii = keys.length; i < ii; i++) {
if (keys[i] !== 'Off') {
this.data.buttonValue = keys[i];
break;
}
_processCheckBox() {
if (!isName(this.data.fieldValue)) {
return;
}
this.data.fieldValue = this.data.fieldValue.name;
}
_processRadioButton(params) {
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.
let fieldParent = params.dict.get('Parent');
if (isDict(fieldParent) && fieldParent.has('V')) {
let fieldParentValue = fieldParent.get('V');
if (isName(fieldParentValue)) {
this.data.fieldValue = fieldParentValue.name;
}
}
// The button's value corresponds to its appearance state.
let appearanceStates = params.dict.get('AP');
if (!isDict(appearanceStates)) {
return;
}
let normalAppearanceState = appearanceStates.get('N');
if (!isDict(normalAppearanceState)) {
return;
}
let keys = normalAppearanceState.getKeys();
for (let i = 0, ii = keys.length; i < ii; i++) {
if (keys[i] !== 'Off') {
this.data.buttonValue = keys[i];
break;
}
}
}
_processPushButton(params) {
if (!params.dict.has('A')) {
warn('Push buttons without action dictionaries are not supported');
return;
}
Catalog.parseDestDictionary({
destDict: params.dict,
resultObj: this.data,
docBaseUrl: params.pdfManager.docBaseUrl,
});
}
}

22
src/display/annotation_layer.js
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@ -61,8 +61,7 @@ class AnnotationElementFactory {
} else if (parameters.data.checkBox) {
return new CheckboxWidgetAnnotationElement(parameters);
}
warn('Unimplemented button widget annotation: pushbutton');
break;
return new PushButtonWidgetAnnotationElement(parameters);
case 'Ch':
return new ChoiceWidgetAnnotationElement(parameters);
}
@ -543,6 +542,25 @@ class RadioButtonWidgetAnnotationElement extends WidgetAnnotationElement {
}
}
class PushButtonWidgetAnnotationElement extends LinkAnnotationElement {
/**
* Render the push button widget annotation's HTML element
* in the empty container.
*
* @public
* @memberof PushButtonWidgetAnnotationElement
* @returns {HTMLSectionElement}
*/
render() {
// The rendering and functionality of a push button widget annotation is
// equal to that of a link annotation, but may have more functionality, such
// as performing actions on form fields (resetting, submitting, et cetera).
let container = super.render();
container.className = 'buttonWidgetAnnotation pushButton';
return container;
}
}
class ChoiceWidgetAnnotationElement extends WidgetAnnotationElement {
constructor(parameters) {
super(parameters, parameters.renderInteractiveForms);

3
test/annotation_layer_builder_overrides.css
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@ -19,7 +19,8 @@
position: absolute;
}
.annotationLayer .linkAnnotation > a {
.annotationLayer .linkAnnotation > a,
.annotationLayer .buttonWidgetAnnotation.pushButton > a {
opacity: 0.2;
background: #ff0;
box-shadow: 0px 2px 10px #ff0;

1
test/pdfs/issue4872.pdf.link Normal file
View File

@ -0,0 +1 @@
https://web.archive.org/web/20171003035412/https://www.cs.utexas.edu/users/EWD/ewd02xx/EWD288.PDF

10
test/test_manifest.json
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@ -3717,6 +3717,16 @@
"type": "eq",
"annotations": true
},
{ "id": "issue4872",
"file": "pdfs/issue4872.pdf",
"md5": "21c6cbc682140d6f6017bbeb45892053",
"rounds": 1,
"link": true,
"firstPage": 1,
"lastPage": 1,
"type": "eq",
"annotations": true
},
{ "id": "issue6108",
"file": "pdfs/issue6108.pdf",
"md5": "8961cb55149495989a80bf0487e0f076",

12
web/annotation_layer_builder.css
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@ -17,7 +17,8 @@
position: absolute;
}
.annotationLayer .linkAnnotation > a {
.annotationLayer .linkAnnotation > a,
.annotationLayer .buttonWidgetAnnotation.pushButton > a {
position: absolute;
font-size: 1em;
top: 0;
@ -26,11 +27,16 @@
height: 100%;
}
.annotationLayer .linkAnnotation > a /* -ms-a */ {
.annotationLayer .linkAnnotation > a /* -ms-a */ {
background: url("data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7") 0 0 repeat;
}
.annotationLayer .linkAnnotation > a:hover {
.annotationLayer .buttonWidgetAnnotation.pushButton > a /* -ms-a */ {
background: url("data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7") 0 0 repeat;
}
.annotationLayer .linkAnnotation > a:hover,
.annotationLayer .buttonWidgetAnnotation.pushButton > a:hover {
opacity: 0.2;
background: #ff0;
box-shadow: 0px 2px 10px #ff0;