michael@0: /* This Source Code Form is subject to the terms of the Mozilla Public
michael@0:  * License, v. 2.0. If a copy of the MPL was not distributed with this
michael@0:  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
michael@0: 
michael@0: /*
michael@0: Locate anchors for annotations and prepare to display the annotations.
michael@0: 
michael@0: For each annotation, if its URL matches this page,
michael@0: - get the ancestor whose ID matches the ID in the anchor
michael@0: - look for a <p> element whose content contains the anchor text
michael@0: 
michael@0: That's considered a match. Then we:
michael@0: - highlight the anchor element
michael@0: - add an 'annotated' class to tell the selector to skip this element
michael@0: - embed the annottion text as a new attribute
michael@0: 
michael@0: For all annotated elements:
michael@0: - bind 'mouseenter' and 'mouseleave' events to the element, to send 'show'
michael@0:   and 'hide' messages back to the add-on.
michael@0: */
michael@0: 
michael@0: self.on('message', function onMessage(annotations) {
michael@0:   annotations.forEach(
michael@0:     function(annotation) {
michael@0:       if(annotation.url == document.location.toString()) {
michael@0:         createAnchor(annotation);
michael@0:       }
michael@0:   });
michael@0: 
michael@0:   $('.annotated').css('border', 'solid 3px yellow');
michael@0: 
michael@0:   $('.annotated').bind('mouseenter', function(event) {
michael@0:     self.port.emit('show', $(this).attr('annotation'));
michael@0:     event.stopPropagation();
michael@0:     event.preventDefault();
michael@0:   });
michael@0: 
michael@0:   $('.annotated').bind('mouseleave', function() {
michael@0:     self.port.emit('hide');
michael@0:   });
michael@0: });
michael@0: 
michael@0: 
michael@0: function createAnchor(annotation) {
michael@0:   annotationAnchorAncestor = $('#' + annotation.ancestorId)[0] || document.body;
michael@0:   annotationAnchor = $(annotationAnchorAncestor).parent().find(
michael@0:                      ':contains("' + annotation.anchorText + '")').last();
michael@0:   annotationAnchor.addClass('annotated');
michael@0:   annotationAnchor.attr('annotation', annotation.annotationText);
michael@0: }