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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 {
L10N,
} = require("resource://devtools/client/accessibility/utils/l10n.js");
class Picker {
constructor(panel) {
this._panel = panel;
this.isPicking = false;
this.onPickerAccessibleHovered = this.onPickerAccessibleHovered.bind(this);
this.onPickerAccessiblePicked = this.onPickerAccessiblePicked.bind(this);
this.onPickerAccessiblePreviewed =
this.onPickerAccessiblePreviewed.bind(this);
this.onPickerAccessibleCanceled =
this.onPickerAccessibleCanceled.bind(this);
}
get toolbox() {
return this._panel._toolbox;
}
get accessibilityProxy() {
return this._panel.accessibilityProxy;
}
get pickerButton() {
return this.toolbox.pickerButton;
}
get _telemetry() {
return this._panel._telemetry;
}
release() {
this._panel = null;
}
emit(event, data) {
this.toolbox.emit(event, data);
}
/**
* Select accessible object in the tree.
* @param {Object} accessible
* Accessiblle object to be selected in the inspector tree.
*/
select(accessible) {
this._panel.selectAccessible(accessible);
}
/**
* Highlight accessible object in the tree.
* @param {Object} accessible
* Accessiblle object to be selected in the inspector tree.
*/
highlight(accessible) {
this._panel.highlightAccessible(accessible);
}
getStr(key) {
return L10N.getStr(key);
}
/**
* Override the default presentation of the picker button in toolbox's top
* level toolbar.
*/
updateButton() {
this.pickerButton.description = this.getStr("accessibility.pick");
this.pickerButton.className = "accessibility";
this.pickerButton.disabled = !this.accessibilityProxy.enabled;
if (!this.accessibilityProxy.enabled && this.isPicking) {
this.cancel();
}
}
/**
* Handle an event when a new accessible object is hovered over.
* @param {Object} accessible
* newly hovered accessible object
*/
onPickerAccessibleHovered(accessible) {
if (accessible) {
this.emit("picker-accessible-hovered", accessible);
this.highlight(accessible);
}
}
/**
* Handle an event when a new accessible is picked by the user.
* @param {Object} accessible
* newly picked accessible object
*/
onPickerAccessiblePicked(accessible) {
if (accessible) {
this.select(accessible);
}
this.stop();
}
/**
* Handle an event when a new accessible is previewed by the user.
* @param {Object} accessible
* newly previewed accessible object
*/
onPickerAccessiblePreviewed(accessible) {
if (accessible) {
this.select(accessible);
}
}
/**
* Handle an event when picking is cancelled by the user.s
*/
onPickerAccessibleCanceled() {
this.cancel();
this.emit("picker-accessible-canceled");
}
/**
* Cancel picking.
*/
async cancel() {
await this.stop();
}
/**
* Stop picking.
*/
async stop() {
if (!this.isPicking) {
return;
}
this.isPicking = false;
this.pickerButton.isChecked = false;
await this.accessibilityProxy.cancelPick();
this._telemetry.toolClosed("accessibility_picker", this);
this.emit("picker-stopped");
}
/**
* Start picking.
* @param {Boolean} doFocus
* If true, move keyboard focus into content.
*/
async start(doFocus = true) {
if (this.isPicking) {
return;
}
this.isPicking = true;
this.pickerButton.isChecked = true;
await this.accessibilityProxy.pick(
doFocus,
this.onPickerAccessibleHovered,
this.onPickerAccessiblePicked,
this.onPickerAccessiblePreviewed,
this.onPickerAccessibleCanceled
);
this._telemetry.toolOpened("accessibility_picker", this);
this.emit("picker-started");
}
/**
* Toggle between starting and canceling the picker.
* @param {Boolean} doFocus
* If true, move keyboard focus into content.
*/
toggle(doFocus) {
if (this.isPicking) {
return this.cancel();
}
return this.start(doFocus);
}
}
exports.Picker = Picker;
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