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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/. */
"use strict";
const { VariablesView } = require("resource://devtools/client/shared/widgets/VariablesView.jsm");
const GENERIC_VARIABLES_VIEW_SETTINGS = {
searchEnabled: false,
editableValueTooltip: "",
editableNameTooltip: "",
preventDisableOnChange: true,
preventDescriptorModifiers: false,
eval: () => {}
};
/**
* Functions handling the audio node inspector UI.
*/
var PropertiesView = {
/**
* Initialization function called when the tool starts up.
*/
initialize: function () {
this._onEval = this._onEval.bind(this);
this._onNodeSet = this._onNodeSet.bind(this);
window.on(EVENTS.UI_INSPECTOR_NODE_SET, this._onNodeSet);
this._propsView = new VariablesView($("#properties-content"), GENERIC_VARIABLES_VIEW_SETTINGS);
this._propsView.eval = this._onEval;
},
/**
* Destruction function called when the tool cleans up.
*/
destroy: function () {
window.off(EVENTS.UI_INSPECTOR_NODE_SET, this._onNodeSet);
this._propsView = null;
},
/**
* Empties out the props view.
*/
resetUI: function () {
this._propsView.empty();
this._currentNode = null;
},
/**
* Internally sets the current audio node and rebuilds appropriate
* views.
*/
_setAudioNode: function (node) {
this._currentNode = node;
if (this._currentNode) {
this._buildPropertiesView();
}
},
/**
* Reconstructs the `Properties` tab in the inspector
* with the `this._currentNode` as it's source.
*/
_buildPropertiesView: Task.async(function* () {
let propsView = this._propsView;
let node = this._currentNode;
propsView.empty();
let audioParamsScope = propsView.addScope("AudioParams");
let props = yield node.getParams();
// Disable AudioParams VariableView expansion
// when there are no props i.e. AudioDestinationNode
this._togglePropertiesView(!!props.length);
props.forEach(({ param, value, flags }) => {
let descriptor = {
value: value,
writable: !flags || !flags.readonly,
};
let item = audioParamsScope.addItem(param, descriptor);
// No items should currently display a dropdown
item.twisty = false;
});
audioParamsScope.expanded = true;
window.emit(EVENTS.UI_PROPERTIES_TAB_RENDERED, node.id);
}),
/**
* Toggles the display of the "empty" properties view when
* node has no properties to display.
*/
_togglePropertiesView: function (show) {
let propsView = $("#properties-content");
let emptyView = $("#properties-empty");
(show ? propsView : emptyView).removeAttribute("hidden");
(show ? emptyView : propsView).setAttribute("hidden", "true");
},
/**
* Returns the scope for AudioParams in the
* VariablesView.
*
* @return Scope
*/
_getAudioPropertiesScope: function () {
return this._propsView.getScopeAtIndex(0);
},
/**
* Event handlers
*/
/**
* Called when the inspector view determines a node is selected.
*/
_onNodeSet: function (_, id) {
this._setAudioNode(gAudioNodes.get(id));
},
/**
* Executed when an audio prop is changed in the UI.
*/
_onEval: Task.async(function* (variable, value) {
let ownerScope = variable.ownerView;
let node = this._currentNode;
let propName = variable.name;
let error;
if (!variable._initialDescriptor.writable) {
error = new Error("Variable " + propName + " is not writable.");
} else {
// Cast value to proper type
try {
let number = parseFloat(value);
if (!isNaN(number)) {
value = number;
} else {
value = JSON.parse(value);
}
error = yield node.actor.setParam(propName, value);
}
catch (e) {
error = e;
}
}
// TODO figure out how to handle and display set prop errors
// and enable `test/brorwser_wa_properties-view-edit.js`
// Bug 994258
if (!error) {
ownerScope.get(propName).setGrip(value);
window.emit(EVENTS.UI_SET_PARAM, node.id, propName, value);
} else {
window.emit(EVENTS.UI_SET_PARAM_ERROR, node.id, propName, value);
}
})
};
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