Implement support for StrikeOut annotations

src/core/annotation.js

@@ -99,6 +99,9 @@ AnnotationFactory.prototype = /** @lends AnnotationFactory.prototype */ {
       case 'Underline':
         return new UnderlineAnnotation(parameters);
 
+      case 'StrikeOut':
+        return new StrikeOutAnnotation(parameters);
+
       default:
         warn('Unimplemented annotation type "' + subtype + '", ' +
              'falling back to base annotation');
@@ -805,6 +808,22 @@ var UnderlineAnnotation = (function UnderlineAnnotationClosure() {
   return UnderlineAnnotation;
 })();
 
+var StrikeOutAnnotation = (function StrikeOutAnnotationClosure() {
+  function StrikeOutAnnotation(parameters) {
+    Annotation.call(this, parameters);
+
+    this.data.annotationType = AnnotationType.STRIKEOUT;
+    this.data.hasHtml = true;
+
+    // PDF viewers completely ignore any border styles.
+    this.data.borderStyle.setWidth(0);
+  }
+
+  Util.inherit(StrikeOutAnnotation, Annotation, {});
+
+  return StrikeOutAnnotation;
+})();
+
 exports.Annotation = Annotation;
 exports.AnnotationBorderStyle = AnnotationBorderStyle;
 exports.AnnotationFactory = AnnotationFactory;

src/display/annotation_layer.js

@@ -75,6 +75,9 @@ AnnotationElementFactory.prototype =
       case AnnotationType.UNDERLINE:
         return new UnderlineAnnotationElement(parameters);
 
+      case AnnotationType.STRIKEOUT:
+        return new StrikeOutAnnotationElement(parameters);
+
       default:
         throw new Error('Unimplemented annotation type "' + subtype + '"');
     }
@@ -630,6 +633,33 @@ var UnderlineAnnotationElement = (
   return UnderlineAnnotationElement;
 })();
 
+/**
+ * @class
+ * @alias StrikeOutAnnotationElement
+ */
+var StrikeOutAnnotationElement = (
+    function StrikeOutAnnotationElementClosure() {
+  function StrikeOutAnnotationElement(parameters) {
+    AnnotationElement.call(this, parameters);
+  }
+
+  Util.inherit(StrikeOutAnnotationElement, AnnotationElement, {
+    /**
+     * Render the strikeout annotation's HTML element in the empty container.
+     *
+     * @public
+     * @memberof StrikeOutAnnotationElement
+     * @returns {HTMLSectionElement}
+     */
+    render: function StrikeOutAnnotationElement_render() {
+      this.container.className = 'strikeoutAnnotation';
+      return this.container;
+    }
+  });
+
+  return StrikeOutAnnotationElement;
+})();
+
 /**
  * @typedef {Object} AnnotationLayerParameters
  * @property {PageViewport} viewport

test/pdfs/.gitignore

@@ -202,3 +202,4 @@
 !annotation-link-text-popup.pdf
 !annotation-text-without-popup.pdf
 !annotation-underline.pdf
+!annotation-strikeout.pdf

test/test_manifest.json

@@ -2645,6 +2645,13 @@
        "type": "eq",
        "annotations": true
     },
+    {  "id": "annotation-strikeout",
+       "file": "pdfs/annotation-strikeout.pdf",
+       "md5": "6624e6b5bedd2f2855b6ab12bbf93c57",
+       "rounds": 1,
+       "type": "eq",
+       "annotations": true
+    },
     {  "id": "issue6108",
        "file": "pdfs/issue6108.pdf",
        "md5": "8961cb55149495989a80bf0487e0f076",

web/annotation_layer_builder.css

@@ -72,3 +72,7 @@
 .annotationLayer .underlineAnnotation {
   cursor: pointer;
 }
+
+.annotationLayer .strikeoutAnnotation {
+  cursor: pointer;
+}