aboutsummaryrefslogtreecommitdiff
path: root/tools/addon-sdk-1.4/examples/annotator/lib/main.js
diff options
context:
space:
mode:
Diffstat (limited to 'tools/addon-sdk-1.4/examples/annotator/lib/main.js')
-rw-r--r--tools/addon-sdk-1.4/examples/annotator/lib/main.js290
1 files changed, 290 insertions, 0 deletions
diff --git a/tools/addon-sdk-1.4/examples/annotator/lib/main.js b/tools/addon-sdk-1.4/examples/annotator/lib/main.js
new file mode 100644
index 0000000..9c9fba3
--- /dev/null
+++ b/tools/addon-sdk-1.4/examples/annotator/lib/main.js
@@ -0,0 +1,290 @@
+var widgets = require('widget');
+var pageMod = require('page-mod');
+var data = require('self').data;
+var panels = require('panel');
+var simpleStorage = require('simple-storage');
+var notifications = require("notifications");
+var privateBrowsing = require('private-browsing');
+
+/*
+Global variables
+* Boolean to indicate whether the add-on is switched on or not
+* Array for all workers associated with the 'selector' page mod
+* Array for all workers associated with the 'matcher' page mod
+*/
+var annotatorIsOn = false;
+var selectors = [];
+var matchers = [];
+
+if (!simpleStorage.storage.annotations)
+ simpleStorage.storage.annotations = [];
+
+/*
+Update the matchers: call this whenever the set of annotations changes
+*/
+function updateMatchers() {
+ matchers.forEach(function (matcher) {
+ matcher.postMessage(simpleStorage.storage.annotations);
+ });
+}
+
+/*
+You can add annotations iff the add-on is on AND private browsing is off
+*/
+function canEnterAnnotations() {
+ return (annotatorIsOn && !privateBrowsing.isActive);
+}
+
+/*
+Constructor for an Annotation object
+*/
+function Annotation(annotationText, anchor) {
+ this.annotationText = annotationText;
+ this.url = anchor[0];
+ this.ancestorId = anchor[1];
+ this.anchorText = anchor[2];
+}
+
+/*
+Function to deal with a new annotation.
+Create a new annotation object, store it, and
+notify all the annotators of the change.
+*/
+function handleNewAnnotation(annotationText, anchor) {
+ var newAnnotation = new Annotation(annotationText, anchor);
+ simpleStorage.storage.annotations.push(newAnnotation);
+ updateMatchers();
+}
+
+/*
+Function to tell the selector page mod that the add-on has become (in)active
+*/
+function activateSelectors() {
+ selectors.forEach(
+ function (selector) {
+ selector.postMessage(canEnterAnnotations());
+ });
+}
+
+/*
+Toggle activation: update the on/off state and notify the selectors.
+Toggling activation is disabled when private browsing is on.
+*/
+function toggleActivation() {
+ if (privateBrowsing.isActive) {
+ return false;
+ }
+ annotatorIsOn = !annotatorIsOn;
+ activateSelectors();
+ return canEnterAnnotations();
+}
+
+function detachWorker(worker, workerArray) {
+ var index = workerArray.indexOf(worker);
+ if(index != -1) {
+ workerArray.splice(index, 1);
+ }
+}
+
+exports.main = function() {
+
+/*
+The widget provides a mechanism to switch the selector on or off, and to
+view the list of annotations.
+
+The selector is switched on/off with a left-click, and the list of annotations
+is displayed on a right-click.
+*/
+ var widget = widgets.Widget({
+ id: 'toggle-switch',
+ label: 'Annotator',
+ contentURL: data.url('widget/pencil-off.png'),
+ contentScriptWhen: 'ready',
+ contentScriptFile: data.url('widget/widget.js')
+ });
+
+ widget.port.on('left-click', function() {
+ console.log('activate/deactivate');
+ widget.contentURL = toggleActivation() ?
+ data.url('widget/pencil-on.png') :
+ data.url('widget/pencil-off.png');
+ });
+
+ widget.port.on('right-click', function() {
+ console.log('show annotation list');
+ annotationList.show();
+ });
+
+/*
+The selector page-mod enables the user to select page elements to annotate.
+
+It is attached to all pages but only operates if the add-on is active.
+
+The content script highlights any page elements which can be annotated. If the
+user clicks a highlighted element it sends a message to the add-on containing
+information about the element clicked, which is called the anchor of the
+annotation.
+
+When we receive this message we assign the anchor to the annotationEditor and
+display it.
+*/
+ var selector = pageMod.PageMod({
+ include: ['*'],
+ contentScriptWhen: 'ready',
+ contentScriptFile: [data.url('jquery-1.4.2.min.js'),
+ data.url('selector.js')],
+ onAttach: function(worker) {
+ worker.postMessage(canEnterAnnotations());
+ selectors.push(worker);
+ worker.port.on('show', function(data) {
+ annotationEditor.annotationAnchor = data;
+ annotationEditor.show();
+ });
+ worker.on('detach', function () {
+ detachWorker(this, selectors);
+ });
+ }
+ });
+
+/*
+The annotationEditor panel is the UI component used for creating
+new annotations. It contains a text area for the user to
+enter the annotation.
+
+When we are ready to display the editor we assign its 'anchor' property
+and call its show() method.
+
+Its content script sends the content of the text area to the add-on
+when the user presses the return key.
+
+When we receives this message we create a new annotation using the anchor
+and the text the user entered, store it, and hide the panel.
+*/
+ var annotationEditor = panels.Panel({
+ width: 220,
+ height: 220,
+ contentURL: data.url('editor/annotation-editor.html'),
+ contentScriptFile: data.url('editor/annotation-editor.js'),
+ onMessage: function(annotationText) {
+ if (annotationText)
+ handleNewAnnotation(annotationText, this.annotationAnchor);
+ annotationEditor.hide();
+ },
+ onShow: function() {
+ this.postMessage('focus');
+ }
+ });
+
+/*
+The annotationList panel is the UI component that lists all the annotations
+the user has entered.
+
+On its 'show' event we pass it the array of annotations.
+
+The content script creates the HTML elements for the annotations, and
+intercepts clicks on the links, passing them back to the add-on to open them
+in the browser.
+*/
+ var annotationList = panels.Panel({
+ width: 420,
+ height: 200,
+ contentURL: data.url('list/annotation-list.html'),
+ contentScriptFile: [data.url('jquery-1.4.2.min.js'),
+ data.url('list/annotation-list.js')],
+ contentScriptWhen: 'ready',
+ onShow: function() {
+ this.postMessage(simpleStorage.storage.annotations);
+ },
+ onMessage: function(message) {
+ require('tabs').open(message);
+ }
+ });
+
+/*
+We listen for the OverQuota event from simple-storage.
+If it fires we just notify the user and delete the most
+recent annotations until we are back in quota.
+*/
+ simpleStorage.on("OverQuota", function () {
+ notifications.notify({
+ title: 'Storage space exceeded',
+ text: 'Removing recent annotations'});
+ while (simpleStorage.quotaUsage > 1)
+ simpleStorage.storage.annotations.pop();
+ });
+
+/*
+We listen for private browsing start/stop events to change the widget icon
+and to notify the selectors of the change in state.
+*/
+ privateBrowsing.on('start', function() {
+ widget.contentURL = data.url('widget/pencil-off.png');
+ activateSelectors();
+ });
+
+ privateBrowsing.on('stop', function() {
+ if (canEnterAnnotations()) {
+ widget.contentURL = data.url('widget/pencil-on.png');
+ activateSelectors();
+ }
+ });
+
+/*
+The matcher page-mod locates anchors on web pages and prepares for the
+annotation to be displayed.
+
+It is attached to all pages, and when it is attached we pass it the complete
+list of annotations. It looks for anchors in its page. If it finds one it
+highlights the anchor and binds mouseenter/mouseout events to 'show' and 'hide'
+messages to the add-on.
+
+When the add-on receives the 'show' message it assigns the annotation text to
+the annotation panel and shows it.
+
+Note that the matcher is active whether or not the add-on is active:
+'inactive' only means that the user can't create new add-ons, they can still
+see old ones.
+*/
+ var matcher = pageMod.PageMod({
+ include: ['*'],
+ contentScriptWhen: 'ready',
+ contentScriptFile: [data.url('jquery-1.4.2.min.js'),
+ data.url('matcher.js')],
+ onAttach: function(worker) {
+ if(simpleStorage.storage.annotations) {
+ worker.postMessage(simpleStorage.storage.annotations);
+ }
+ worker.port.on('show', function(data) {
+ annotation.content = data;
+ annotation.show();
+ });
+ worker.port.on('hide', function() {
+ annotation.content = null;
+ annotation.hide();
+ });
+ worker.on('detach', function () {
+ detachWorker(this, matchers);
+ });
+ matchers.push(worker);
+ }
+ });
+
+/*
+The annotation panel is the UI component that displays an annotation.
+
+When we are ready to show it we assign its 'content' attribute to contain
+the annotation text, and that gets sent to the content process in onShow().
+*/
+ var annotation = panels.Panel({
+ width: 200,
+ height: 180,
+ contentURL: data.url('annotation/annotation.html'),
+ contentScriptFile: [data.url('jquery-1.4.2.min.js'),
+ data.url('annotation/annotation.js')],
+ contentScriptWhen: 'ready',
+ onShow: function() {
+ this.postMessage(this.content);
+ }
+ });
+
+}