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/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this file,
* You can obtain one at http://mozilla.org/MPL/2.0/. */
/**
* A collection of `AudioNodeModel`s used throughout the editor
* to keep track of audio nodes within the audio context.
*/
var gAudioNodes = new AudioNodesCollection();
/**
* Initializes the web audio editor views
*/
function startupWebAudioEditor() {
return all([
WebAudioEditorController.initialize(),
ContextView.initialize(),
InspectorView.initialize(),
PropertiesView.initialize(),
AutomationView.initialize()
]);
}
/**
* Destroys the web audio editor controller and views.
*/
function shutdownWebAudioEditor() {
return all([
WebAudioEditorController.destroy(),
ContextView.destroy(),
InspectorView.destroy(),
PropertiesView.destroy(),
AutomationView.destroy()
]);
}
/**
* Functions handling target-related lifetime events.
*/
var WebAudioEditorController = {
/**
* Listen for events emitted by the current tab target.
*/
initialize: Task.async(function* () {
this._onTabNavigated = this._onTabNavigated.bind(this);
this._onThemeChange = this._onThemeChange.bind(this);
gTarget.on("will-navigate", this._onTabNavigated);
gTarget.on("navigate", this._onTabNavigated);
gFront.on("start-context", this._onStartContext);
gFront.on("create-node", this._onCreateNode);
gFront.on("connect-node", this._onConnectNode);
gFront.on("connect-param", this._onConnectParam);
gFront.on("disconnect-node", this._onDisconnectNode);
gFront.on("change-param", this._onChangeParam);
gFront.on("destroy-node", this._onDestroyNode);
// Hook into theme change so we can change
// the graph's marker styling, since we can't do this
// with CSS
gDevTools.on("pref-changed", this._onThemeChange);
// Store the AudioNode definitions from the WebAudioFront, if the method exists.
// If not, get the JSON directly. Using the actor method is preferable so the client
// knows exactly what methods are supported on the server.
let actorHasDefinition = yield gTarget.actorHasMethod("webaudio", "getDefinition");
if (actorHasDefinition) {
AUDIO_NODE_DEFINITION = yield gFront.getDefinition();
} else {
AUDIO_NODE_DEFINITION = require("devtools/server/actors/utils/audionodes.json");
}
// Make sure the backend is prepared to handle audio contexts.
// Since actors are created lazily on the first request to them, we need to send an
// early request to ensure the CallWatcherActor is running and watching for new window
// globals.
gFront.setup({ reload: false });
}),
/**
* Remove events emitted by the current tab target.
*/
destroy: function () {
gTarget.off("will-navigate", this._onTabNavigated);
gTarget.off("navigate", this._onTabNavigated);
gFront.off("start-context", this._onStartContext);
gFront.off("create-node", this._onCreateNode);
gFront.off("connect-node", this._onConnectNode);
gFront.off("connect-param", this._onConnectParam);
gFront.off("disconnect-node", this._onDisconnectNode);
gFront.off("change-param", this._onChangeParam);
gFront.off("destroy-node", this._onDestroyNode);
gDevTools.off("pref-changed", this._onThemeChange);
},
/**
* Called when page is reloaded to show the reload notice and waiting
* for an audio context notice.
*/
reset: function () {
$("#content").hidden = true;
ContextView.resetUI();
InspectorView.resetUI();
PropertiesView.resetUI();
},
// Since node events (create, disconnect, connect) are all async,
// we have to make sure to wait that the node has finished creating
// before performing an operation on it.
getNode: function* (nodeActor) {
let id = nodeActor.actorID;
let node = gAudioNodes.get(id);
if (!node) {
let { resolve, promise } = defer();
gAudioNodes.on("add", function createNodeListener(createdNode) {
if (createdNode.id === id) {
gAudioNodes.off("add", createNodeListener);
resolve(createdNode);
}
});
node = yield promise;
}
return node;
},
/**
* Fired when the devtools theme changes (light, dark, etc.)
* so that the graph can update marker styling, as that
* cannot currently be done with CSS.
*/
_onThemeChange: function (event, data) {
window.emit(EVENTS.THEME_CHANGE, data.newValue);
},
/**
* Called for each location change in the debugged tab.
*/
_onTabNavigated: Task.async(function* (event, {isFrameSwitching}) {
switch (event) {
case "will-navigate": {
// Clear out current UI.
this.reset();
// When switching to an iframe, ensure displaying the reload button.
// As the document has already been loaded without being hooked.
if (isFrameSwitching) {
$("#reload-notice").hidden = false;
$("#waiting-notice").hidden = true;
} else {
// Otherwise, we are loading a new top level document,
// so we don't need to reload anymore and should receive
// new node events.
$("#reload-notice").hidden = true;
$("#waiting-notice").hidden = false;
}
// Clear out stored audio nodes
gAudioNodes.reset();
window.emit(EVENTS.UI_RESET);
break;
}
case "navigate": {
// TODO Case of bfcache, needs investigating
// bug 994250
break;
}
}
}),
/**
* Called after the first audio node is created in an audio context,
* signaling that the audio context is being used.
*/
_onStartContext: function () {
$("#reload-notice").hidden = true;
$("#waiting-notice").hidden = true;
$("#content").hidden = false;
window.emit(EVENTS.START_CONTEXT);
},
/**
* Called when a new node is created. Creates an `AudioNodeView` instance
* for tracking throughout the editor.
*/
_onCreateNode: function (nodeActor) {
gAudioNodes.add(nodeActor);
},
/**
* Called on `destroy-node` when an AudioNode is GC'd. Removes
* from the AudioNode array and fires an event indicating the removal.
*/
_onDestroyNode: function (nodeActor) {
gAudioNodes.remove(gAudioNodes.get(nodeActor.actorID));
},
/**
* Called when a node is connected to another node.
*/
_onConnectNode: Task.async(function* ({ source: sourceActor, dest: destActor }) {
let source = yield WebAudioEditorController.getNode(sourceActor);
let dest = yield WebAudioEditorController.getNode(destActor);
source.connect(dest);
}),
/**
* Called when a node is conneceted to another node's AudioParam.
*/
_onConnectParam: Task.async(function* ({ source: sourceActor, dest: destActor, param }) {
let source = yield WebAudioEditorController.getNode(sourceActor);
let dest = yield WebAudioEditorController.getNode(destActor);
source.connect(dest, param);
}),
/**
* Called when a node is disconnected.
*/
_onDisconnectNode: Task.async(function* (nodeActor) {
let node = yield WebAudioEditorController.getNode(nodeActor);
node.disconnect();
}),
/**
* Called when a node param is changed.
*/
_onChangeParam: Task.async(function* ({ actor, param, value }) {
let node = yield WebAudioEditorController.getNode(actor);
window.emit(EVENTS.CHANGE_PARAM, node, param, value);
})
};
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