Text widget annotations: improve unit and reference tests

This patch improves the unit tests by testing the support for read-only
and multiline fields. Moreover, we add a reference test to ensure that
the text widgets are not only rendered, but also that their contents are
styled properly.

Finally, we perform minor improvements in `src/core/annotation.js`, for
example adding missing comments.

src/core/annotation.js

@@ -66,6 +66,8 @@ AnnotationFactory.prototype = /** @lends AnnotationFactory.prototype */ {
   /**
    * @param {XRef} xref
    * @param {Object} ref
+   * @param {string} uniquePrefix
+   * @param {Object} idCounters
    * @returns {Annotation}
    */
   create: function AnnotationFactory_create(xref, ref,
@@ -717,20 +719,19 @@ var TextWidgetAnnotation = (function TextWidgetAnnotationClosure() {
         return Annotation.prototype.getOperatorList.call(this, evaluator, task);
       }
 
-      var opList = new OperatorList();
-      var data = this.data;
+      var operatorList = new OperatorList();
 
       // Even if there is an appearance stream, ignore it. This is the
       // behaviour used by Adobe Reader.
-      if (!data.defaultAppearance) {
-        return Promise.resolve(opList);
+      if (!this.data.defaultAppearance) {
+        return Promise.resolve(operatorList);
       }
 
-      var stream = new Stream(stringToBytes(data.defaultAppearance));
-      return evaluator.getOperatorList(stream, task,
-                                       this.fieldResources, opList).
+      var stream = new Stream(stringToBytes(this.data.defaultAppearance));
+      return evaluator.getOperatorList(stream, task, this.fieldResources,
+                                       operatorList).
         then(function () {
-          return opList;
+          return operatorList;
         });
     }
   });

test/annotation_layer_test.css

@@ -43,7 +43,8 @@
   position: absolute;
 }
 
-.annotationLayer .textWidgetAnnotation input {
+.annotationLayer .textWidgetAnnotation input,
+.annotationLayer .textWidgetAnnotation textarea {
   background-color: rgba(0, 54, 255, 0.13);
   border: 1px solid transparent;
   box-sizing: border-box;
@@ -54,6 +55,18 @@
   width: 100%;
 }
 
+.annotationLayer .textWidgetAnnotation textarea {
+  font: message-box;
+  font-size: 9px;
+  resize: none;
+}
+
+.annotationLayer .textWidgetAnnotation input[disabled],
+.annotationLayer .textWidgetAnnotation textarea[disabled] {
+  background: none;
+  border: 1px solid transparent;
+}
+
 .annotationLayer .popupAnnotation {
   display: block !important;
 }

test/pdfs/.gitignore

@@ -249,4 +249,5 @@
 !annotation-squiggly.pdf
 !annotation-highlight.pdf
 !annotation-fileattachment.pdf
+!annotation-text-widget.pdf
 !zero_descent.pdf

test/test_manifest.json

@@ -3137,6 +3137,13 @@
        "type": "eq",
        "annotations": true
     },
+    {  "id": "annotation-text-widget-forms",
+       "file": "pdfs/annotation-text-widget.pdf",
+       "md5": "cc9672539ad5b837152a9c6961e5f106",
+       "rounds": 1,
+       "type": "eq",
+       "forms": true
+    },
     {  "id": "issue6108",
        "file": "pdfs/issue6108.pdf",
        "md5": "8961cb55149495989a80bf0487e0f076",

test/unit/annotation_layer_spec.js

@@ -469,7 +469,8 @@ describe('Annotation layer', function() {
       textWidgetDict = null;
     });
 
-    it('should handle unknown text alignment and maximum length', function() {
+    it('should handle unknown text alignment, maximum length and flags',
+        function() {
       var textWidgetRef = new Ref(124, 0);
       var xref = new XRefMock([
         { ref: textWidgetRef, data: textWidgetDict, }
@@ -478,11 +479,15 @@ describe('Annotation layer', function() {
       var textWidgetAnnotation = annotationFactory.create(xref, textWidgetRef);
       expect(textWidgetAnnotation.data.textAlignment).toEqual(null);
       expect(textWidgetAnnotation.data.maxLen).toEqual(null);
+      expect(textWidgetAnnotation.data.readOnly).toEqual(false);
+      expect(textWidgetAnnotation.data.multiLine).toEqual(false);
     });
 
-    it('should not set invalid text alignment and maximum length', function() {
+    it('should not set invalid text alignment, maximum length and flags',
+        function() {
       textWidgetDict.set('Q', 'center');
       textWidgetDict.set('MaxLen', 'five');
+      textWidgetDict.set('Ff', 'readonly');
 
       var textWidgetRef = new Ref(43, 0);
       var xref = new XRefMock([
@@ -492,11 +497,15 @@ describe('Annotation layer', function() {
       var textWidgetAnnotation = annotationFactory.create(xref, textWidgetRef);
       expect(textWidgetAnnotation.data.textAlignment).toEqual(null);
       expect(textWidgetAnnotation.data.maxLen).toEqual(null);
+      expect(textWidgetAnnotation.data.readOnly).toEqual(false);
+      expect(textWidgetAnnotation.data.multiLine).toEqual(false);
     });
 
-    it('should set valid text alignment and maximum length', function() {
+    it('should set valid text alignment, maximum length and flags',
+        function() {
       textWidgetDict.set('Q', 1);
       textWidgetDict.set('MaxLen', 20);
+      textWidgetDict.set('Ff', 4097);
 
       var textWidgetRef = new Ref(84, 0);
       var xref = new XRefMock([
@@ -506,6 +515,8 @@ describe('Annotation layer', function() {
       var textWidgetAnnotation = annotationFactory.create(xref, textWidgetRef);
       expect(textWidgetAnnotation.data.textAlignment).toEqual(1);
       expect(textWidgetAnnotation.data.maxLen).toEqual(20);
+      expect(textWidgetAnnotation.data.readOnly).toEqual(true);
+      expect(textWidgetAnnotation.data.multiLine).toEqual(true);
     });
   });