mirror of
https://gitlab.winehq.org/wine/wine-gecko.git
synced 2024-09-13 09:24:08 -07:00
1607 lines
49 KiB
JavaScript
1607 lines
49 KiB
JavaScript
/* -*- Mode: javascript; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim: set ft=javascript ts=2 et sw=2 tw=80: */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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"use strict";
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const Cc = Components.classes;
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const Ci = Components.interfaces;
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const Cu = Components.utils;
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const PANE_APPEARANCE_DELAY = 50;
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const PAGE_SIZE_ITEM_COUNT_RATIO = 5;
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Cu.import("resource://gre/modules/Services.jsm");
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Cu.import("resource://gre/modules/XPCOMUtils.jsm");
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this.EXPORTED_SYMBOLS = ["Heritage", "ViewHelpers", "WidgetMethods"];
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/**
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* Inheritance helpers from the addon SDK's core/heritage.
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* Remove these when all devtools are loadered.
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*/
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this.Heritage = {
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/**
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* @see extend in sdk/core/heritage.
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*/
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extend: function(aPrototype, aProperties = {}) {
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return Object.create(aPrototype, this.getOwnPropertyDescriptors(aProperties));
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},
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/**
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* @see getOwnPropertyDescriptors in sdk/core/heritage.
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*/
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getOwnPropertyDescriptors: function(aObject) {
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return Object.getOwnPropertyNames(aObject).reduce((aDescriptor, aName) => {
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aDescriptor[aName] = Object.getOwnPropertyDescriptor(aObject, aName);
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return aDescriptor;
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}, {});
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}
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};
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/**
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* Helpers for creating and messaging between UI components.
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*/
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this.ViewHelpers = {
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/**
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* Convenience method, dispatching a custom event.
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*
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* @param nsIDOMNode aTarget
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* A custom target element to dispatch the event from.
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* @param string aType
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* The name of the event.
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* @param any aDetail
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* The data passed when initializing the event.
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* @return boolean
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* True if the event was cancelled or a registered handler
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* called preventDefault.
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*/
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dispatchEvent: function(aTarget, aType, aDetail) {
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if (!(aTarget instanceof Ci.nsIDOMNode)) {
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return true; // Event cancelled.
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}
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let document = aTarget.ownerDocument || aTarget;
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let dispatcher = aTarget.ownerDocument ? aTarget : document.documentElement;
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let event = document.createEvent("CustomEvent");
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event.initCustomEvent(aType, true, true, aDetail);
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return dispatcher.dispatchEvent(event);
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},
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/**
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* Helper delegating some of the DOM attribute methods of a node to a widget.
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*
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* @param object aWidget
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* The widget to assign the methods to.
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* @param nsIDOMNode aNode
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* A node to delegate the methods to.
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*/
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delegateWidgetAttributeMethods: function(aWidget, aNode) {
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aWidget.getAttribute = aNode.getAttribute.bind(aNode);
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aWidget.setAttribute = aNode.setAttribute.bind(aNode);
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aWidget.removeAttribute = aNode.removeAttribute.bind(aNode);
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},
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/**
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* Helper delegating some of the DOM event methods of a node to a widget.
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*
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* @param object aWidget
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* The widget to assign the methods to.
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* @param nsIDOMNode aNode
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* A node to delegate the methods to.
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*/
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delegateWidgetEventMethods: function(aWidget, aNode) {
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aWidget.addEventListener = aNode.addEventListener.bind(aNode);
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aWidget.removeEventListener = aNode.removeEventListener.bind(aNode);
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},
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/**
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* Checks if the specified object looks like it's been decorated by an
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* event emitter.
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*
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* @return boolean
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* True if it looks, walks and quacks like an event emitter.
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*/
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isEventEmitter: function(aObject) {
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return aObject && aObject.on && aObject.off && aObject.once && aObject.emit;
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},
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/**
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* Checks if the specified object is an instance of a DOM node.
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*
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* @return boolean
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* True if it's a node, false otherwise.
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*/
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isNode: function(aObject) {
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return aObject instanceof Ci.nsIDOMNode ||
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aObject instanceof Ci.nsIDOMElement ||
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aObject instanceof Ci.nsIDOMDocumentFragment;
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},
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/**
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* Prevents event propagation when navigation keys are pressed.
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*
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* @param Event e
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* The event to be prevented.
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*/
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preventScrolling: function(e) {
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switch (e.keyCode) {
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case e.DOM_VK_UP:
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case e.DOM_VK_DOWN:
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case e.DOM_VK_LEFT:
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case e.DOM_VK_RIGHT:
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case e.DOM_VK_PAGE_UP:
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case e.DOM_VK_PAGE_DOWN:
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case e.DOM_VK_HOME:
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case e.DOM_VK_END:
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e.preventDefault();
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e.stopPropagation();
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}
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},
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/**
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* Sets a side pane hidden or visible.
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*
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* @param object aFlags
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* An object containing some of the following properties:
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* - visible: true if the pane should be shown, false to hide
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* - animated: true to display an animation on toggle
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* - delayed: true to wait a few cycles before toggle
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* - callback: a function to invoke when the toggle finishes
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* @param nsIDOMNode aPane
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* The element representing the pane to toggle.
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*/
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togglePane: function(aFlags, aPane) {
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// Hiding is always handled via margins, not the hidden attribute.
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aPane.removeAttribute("hidden");
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// Add a class to the pane to handle min-widths, margins and animations.
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if (!aPane.classList.contains("generic-toggled-side-pane")) {
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aPane.classList.add("generic-toggled-side-pane");
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}
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// Avoid useless toggles.
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if (aFlags.visible == !aPane.hasAttribute("pane-collapsed")) {
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if (aFlags.callback) aFlags.callback();
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return;
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}
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// Computes and sets the pane margins in order to hide or show it.
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function set() {
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if (aFlags.visible) {
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aPane.style.marginLeft = "0";
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aPane.style.marginRight = "0";
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aPane.removeAttribute("pane-collapsed");
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} else {
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let margin = ~~(aPane.getAttribute("width")) + 1;
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aPane.style.marginLeft = -margin + "px";
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aPane.style.marginRight = -margin + "px";
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aPane.setAttribute("pane-collapsed", "");
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}
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// Invoke the callback when the transition ended.
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if (aFlags.animated) {
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aPane.addEventListener("transitionend", function onEvent() {
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aPane.removeEventListener("transitionend", onEvent, false);
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if (aFlags.callback) aFlags.callback();
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}, false);
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}
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// Invoke the callback immediately since there's no transition.
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else {
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if (aFlags.callback) aFlags.callback();
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}
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}
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// The "animated" attributes enables animated toggles (slide in-out).
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if (aFlags.animated) {
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aPane.setAttribute("animated", "");
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} else {
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aPane.removeAttribute("animated");
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}
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// Sometimes it's useful delaying the toggle a few ticks to ensure
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// a smoother slide in-out animation.
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if (aFlags.delayed) {
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aPane.ownerDocument.defaultView.setTimeout(set.bind(this), PANE_APPEARANCE_DELAY);
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} else {
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set.call(this);
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}
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}
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};
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/**
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* Localization convenience methods.
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*
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* @param string aStringBundleName
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* The desired string bundle's name.
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*/
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ViewHelpers.L10N = function(aStringBundleName) {
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XPCOMUtils.defineLazyGetter(this, "stringBundle", () =>
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Services.strings.createBundle(aStringBundleName));
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XPCOMUtils.defineLazyGetter(this, "ellipsis", () =>
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Services.prefs.getComplexValue("intl.ellipsis", Ci.nsIPrefLocalizedString).data);
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};
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ViewHelpers.L10N.prototype = {
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stringBundle: null,
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/**
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* L10N shortcut function.
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*
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* @param string aName
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* @return string
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*/
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getStr: function(aName) {
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return this.stringBundle.GetStringFromName(aName);
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},
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/**
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* L10N shortcut function.
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*
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* @param string aName
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* @param array aArgs
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* @return string
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*/
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getFormatStr: function(aName, ...aArgs) {
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return this.stringBundle.formatStringFromName(aName, aArgs, aArgs.length);
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},
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/**
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* L10N shortcut function for numeric arguments that need to be formatted.
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* All numeric arguments will be fixed to 2 decimals and given a localized
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* decimal separator. Other arguments will be left alone.
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*
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* @param string aName
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* @param array aArgs
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* @return string
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*/
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getFormatStrWithNumbers: function(aName, ...aArgs) {
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let newArgs = aArgs.map(x => typeof x == "number" ? this.numberWithDecimals(x, 2) : x);
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return this.stringBundle.formatStringFromName(aName, newArgs, newArgs.length);
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},
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/**
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* Converts a number to a locale-aware string format and keeps a certain
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* number of decimals.
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*
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* @param number aNumber
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* The number to convert.
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* @param number aDecimals [optional]
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* Total decimals to keep.
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* @return string
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* The localized number as a string.
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*/
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numberWithDecimals: function(aNumber, aDecimals = 0) {
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// If this is an integer, don't do anything special.
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if (aNumber == (aNumber | 0)) {
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return aNumber;
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}
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// Remove {n} trailing decimals. Can't use toFixed(n) because
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// toLocaleString converts the number to a string. Also can't use
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// toLocaleString(, { maximumFractionDigits: n }) because it's not
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// implemented on OS X (bug 368838). Gross.
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let localized = aNumber.toLocaleString(); // localize
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let padded = localized + new Array(aDecimals).join("0"); // pad with zeros
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let match = padded.match("([^]*?\\d{" + aDecimals + "})\\d*$");
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return match.pop();
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}
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};
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/**
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* Shortcuts for lazily accessing and setting various preferences.
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* Usage:
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* let prefs = new ViewHelpers.Prefs("root.path.to.branch", {
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* myIntPref: ["Int", "leaf.path.to.my-int-pref"],
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* myCharPref: ["Char", "leaf.path.to.my-char-pref"],
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* ...
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* });
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*
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* prefs.myCharPref = "foo";
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* let aux = prefs.myCharPref;
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*
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* @param string aPrefsRoot
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* The root path to the required preferences branch.
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* @param object aPrefsObject
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* An object containing { accessorName: [prefType, prefName] } keys.
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*/
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ViewHelpers.Prefs = function(aPrefsRoot = "", aPrefsObject = {}) {
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this.root = aPrefsRoot;
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for (let accessorName in aPrefsObject) {
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let [prefType, prefName] = aPrefsObject[accessorName];
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this.map(accessorName, prefType, prefName);
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}
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};
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ViewHelpers.Prefs.prototype = {
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/**
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* Helper method for getting a pref value.
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*
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* @param string aType
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* @param string aPrefName
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* @return any
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*/
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_get: function(aType, aPrefName) {
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if (this[aPrefName] === undefined) {
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this[aPrefName] = Services.prefs["get" + aType + "Pref"](aPrefName);
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}
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return this[aPrefName];
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},
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/**
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* Helper method for setting a pref value.
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*
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* @param string aType
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* @param string aPrefName
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* @param any aValue
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*/
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_set: function(aType, aPrefName, aValue) {
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Services.prefs["set" + aType + "Pref"](aPrefName, aValue);
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this[aPrefName] = aValue;
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},
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/**
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* Maps a property name to a pref, defining lazy getters and setters.
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*
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* @param string aAccessorName
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* @param string aType
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* @param string aPrefName
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*/
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map: function(aAccessorName, aType, aPrefName) {
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Object.defineProperty(this, aAccessorName, {
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get: () => this._get(aType, [this.root, aPrefName].join(".")),
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set: (aValue) => this._set(aType, [this.root, aPrefName].join("."), aValue)
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});
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}
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};
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/**
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* A generic Item is used to describe children present in a Widget.
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* The label, value and description properties are necessarily strings.
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* Iterable via "for (let childItem in parentItem) { }".
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*
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* @param object aOwnerView
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* The owner view creating this item.
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* @param any aAttachment
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* Some attached primitive/object.
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* @param nsIDOMNode | nsIDOMDocumentFragment | array aContents [optional]
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* A prebuilt node, or an array containing the following properties:
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* - aLabel: the label displayed in the widget
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* - aValue: the actual internal value of the item
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* - aDescription: an optional description of the item
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*/
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function Item(aOwnerView, aAttachment, aContents = []) {
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this.ownerView = aOwnerView;
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this.attachment = aAttachment;
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let [aLabel, aValue, aDescription] = aContents;
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this._label = aLabel + "";
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this._value = aValue + "";
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this._description = (aDescription || "") + "";
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// Allow the insertion of prebuilt nodes, otherwise delegate the item view
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// creation to a widget.
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if (ViewHelpers.isNode(aLabel)) {
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this._prebuiltTarget = aLabel;
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}
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XPCOMUtils.defineLazyGetter(this, "_itemsByElement", () => new Map());
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};
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Item.prototype = {
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get label() this._label,
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get value() this._value,
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get description() this._description,
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get target() this._target,
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/**
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* Immediately appends a child item to this item.
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*
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* @param nsIDOMNode aElement
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* An nsIDOMNode representing the child element to append.
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* @param object aOptions [optional]
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* Additional options or flags supported by this operation:
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* - attachment: some attached primitive/object for the item
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* - attributes: a batch of attributes set to the displayed element
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* - finalize: function invoked when the child item is removed
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* @return Item
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* The item associated with the displayed element.
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*/
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append: function(aElement, aOptions = {}) {
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let item = new Item(this, aOptions.attachment);
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// Entangle the item with the newly inserted child node.
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this._entangleItem(item, this._target.appendChild(aElement));
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// Handle any additional options after entangling the item.
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if (aOptions.attributes) {
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aOptions.attributes.forEach(e => item._target.setAttribute(e[0], e[1]));
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}
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if (aOptions.finalize) {
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item.finalize = aOptions.finalize;
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}
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// Return the item associated with the displayed element.
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return item;
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},
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/**
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* Immediately removes the specified child item from this item.
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*
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* @param Item aItem
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* The item associated with the element to remove.
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*/
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remove: function(aItem) {
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if (!aItem) {
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return;
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}
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this._target.removeChild(aItem._target);
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this._untangleItem(aItem);
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},
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/**
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* Entangles an item (model) with a displayed node element (view).
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*
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* @param Item aItem
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* The item describing a target element.
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* @param nsIDOMNode aElement
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* The element displaying the item.
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*/
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_entangleItem: function(aItem, aElement) {
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this._itemsByElement.set(aElement, aItem);
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aItem._target = aElement;
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},
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/**
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* Untangles an item (model) from a displayed node element (view).
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*
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* @param Item aItem
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* The item describing a target element.
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*/
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_untangleItem: function(aItem) {
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if (aItem.finalize) {
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aItem.finalize(aItem);
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}
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for (let childItem in aItem) {
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aItem.remove(childItem);
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}
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this._unlinkItem(aItem);
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aItem._prebuiltTarget = null;
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aItem._target = null;
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},
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/**
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* Deletes an item from the its parent's storage maps.
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*
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* @param Item aItem
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* The item describing a target element.
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*/
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_unlinkItem: function(aItem) {
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this._itemsByElement.delete(aItem._target);
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},
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/**
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* Returns a string representing the object.
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* @return string
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*/
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toString: function() {
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if (this._label && this._value) {
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return this._label + " -> " + this._value;
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}
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if (this.attachment) {
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return this.attachment.toString();
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}
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return "(null)";
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},
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_label: "",
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_value: "",
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_description: "",
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_prebuiltTarget: null,
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_target: null,
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finalize: null,
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attachment: null
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};
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/**
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* Some generic Widget methods handling Item instances.
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* Iterable via "for (let childItem in wrappedView) { }".
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*
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* Usage:
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* function MyView() {
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* this.widget = new MyWidget(document.querySelector(".my-node"));
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* }
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*
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* MyView.prototype = Heritage.extend(WidgetMethods, {
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* myMethod: function() {},
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* ...
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* });
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*
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* See https://gist.github.com/victorporof/5749386 for more details.
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*
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* Language:
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* - An "item" is an instance of an Item.
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* - An "element" or "node" is a nsIDOMNode.
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*
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|
* The supplied element node or widget can either be a <xul:menulist>, or any
|
|
* other object interfacing the following methods:
|
|
* - function:nsIDOMNode insertItemAt(aIndex:number, aLabel:string, aValue:string)
|
|
* - function:nsIDOMNode getItemAtIndex(aIndex:number)
|
|
* - function removeChild(aChild:nsIDOMNode)
|
|
* - function removeAllItems()
|
|
* - get:nsIDOMNode selectedItem()
|
|
* - set selectedItem(aChild:nsIDOMNode)
|
|
* - function getAttribute(aName:string)
|
|
* - function setAttribute(aName:string, aValue:string)
|
|
* - function removeAttribute(aName:string)
|
|
* - function addEventListener(aName:string, aCallback:function, aBubbleFlag:boolean)
|
|
* - function removeEventListener(aName:string, aCallback:function, aBubbleFlag:boolean)
|
|
*
|
|
* For automagical keyboard and mouse accessibility, the element node or widget
|
|
* should be an event emitter with the following events:
|
|
* - "keyPress" -> (aName:string, aEvent:KeyboardEvent)
|
|
* - "mousePress" -> (aName:string, aEvent:MouseEvent)
|
|
*/
|
|
this.WidgetMethods = {
|
|
/**
|
|
* Sets the element node or widget associated with this container.
|
|
* @param nsIDOMNode | object aWidget
|
|
*/
|
|
set widget(aWidget) {
|
|
this._widget = aWidget;
|
|
|
|
// Can't use WeakMaps for itemsByLabel or itemsByValue because
|
|
// keys are strings, and itemsByElement needs to be iterable.
|
|
XPCOMUtils.defineLazyGetter(this, "_itemsByLabel", () => new Map());
|
|
XPCOMUtils.defineLazyGetter(this, "_itemsByValue", () => new Map());
|
|
XPCOMUtils.defineLazyGetter(this, "_itemsByElement", () => new Map());
|
|
XPCOMUtils.defineLazyGetter(this, "_stagedItems", () => []);
|
|
|
|
// Handle internal events emitted by the widget if necessary.
|
|
if (ViewHelpers.isEventEmitter(aWidget)) {
|
|
aWidget.on("keyPress", this._onWidgetKeyPress.bind(this));
|
|
aWidget.on("mousePress", this._onWidgetMousePress.bind(this));
|
|
}
|
|
},
|
|
|
|
/**
|
|
* Gets the element node or widget associated with this container.
|
|
* @return nsIDOMNode | object
|
|
*/
|
|
get widget() this._widget,
|
|
|
|
/**
|
|
* Prepares an item to be added to this container. This allows, for example,
|
|
* for a large number of items to be batched up before being sorted & added.
|
|
*
|
|
* If the "staged" flag is *not* set to true, the item will be immediately
|
|
* inserted at the correct position in this container, so that all the items
|
|
* still remain sorted. This can (possibly) be much slower than batching up
|
|
* multiple items.
|
|
*
|
|
* By default, this container assumes that all the items should be displayed
|
|
* sorted by their label. This can be overridden with the "index" flag,
|
|
* specifying on which position should an item be appended. The "staged" and
|
|
* "index" flags are mutually exclusive, meaning that all staged items
|
|
* will always be appended.
|
|
*
|
|
* Furthermore, this container makes sure that all the items are unique
|
|
* (two items with the same label or value are not allowed) and non-degenerate
|
|
* (items with "undefined" or "null" labels/values). This can, as well, be
|
|
* overridden via the "relaxed" flag.
|
|
*
|
|
* @param nsIDOMNode | nsIDOMDocumentFragment array aContents
|
|
* A prebuilt node, or an array containing the following properties:
|
|
* - label: the label displayed in the container
|
|
* - value: the actual internal value of the item
|
|
* - description: an optional description of the item
|
|
* @param object aOptions [optional]
|
|
* Additional options or flags supported by this operation:
|
|
* - staged: true to stage the item to be appended later
|
|
* - index: specifies on which position should the item be appended
|
|
* - relaxed: true if this container should allow dupes & degenerates
|
|
* - attachment: some attached primitive/object for the item
|
|
* - attributes: a batch of attributes set to the displayed element
|
|
* - finalize: function invoked when the item is removed
|
|
* @return Item
|
|
* The item associated with the displayed element if an unstaged push,
|
|
* undefined if the item was staged for a later commit.
|
|
*/
|
|
push: function(aContents, aOptions = {}) {
|
|
let item = new Item(this, aOptions.attachment, aContents);
|
|
|
|
// Batch the item to be added later.
|
|
if (aOptions.staged) {
|
|
// An ulterior commit operation will ignore any specified index.
|
|
delete aOptions.index;
|
|
return void this._stagedItems.push({ item: item, options: aOptions });
|
|
}
|
|
// Find the target position in this container and insert the item there.
|
|
if (!("index" in aOptions)) {
|
|
return this._insertItemAt(this._findExpectedIndexFor(item), item, aOptions);
|
|
}
|
|
// Insert the item at the specified index. If negative or out of bounds,
|
|
// the item will be simply appended.
|
|
return this._insertItemAt(aOptions.index, item, aOptions);
|
|
},
|
|
|
|
/**
|
|
* Flushes all the prepared items into this container.
|
|
* Any specified index on the items will be ignored. Everything is appended.
|
|
*
|
|
* @param object aOptions [optional]
|
|
* Additional options or flags supported by this operation:
|
|
* - sorted: true to sort all the items before adding them
|
|
*/
|
|
commit: function(aOptions = {}) {
|
|
let stagedItems = this._stagedItems;
|
|
|
|
// Sort the items before adding them to this container, if preferred.
|
|
if (aOptions.sorted) {
|
|
stagedItems.sort((a, b) => this._currentSortPredicate(a.item, b.item));
|
|
}
|
|
// Append the prepared items to this container.
|
|
for (let { item, options } of stagedItems) {
|
|
this._insertItemAt(-1, item, options);
|
|
}
|
|
// Recreate the temporary items list for ulterior pushes.
|
|
this._stagedItems.length = 0;
|
|
},
|
|
|
|
/**
|
|
* Updates this container to reflect the information provided by the
|
|
* currently selected item.
|
|
*
|
|
* @return boolean
|
|
* True if a selected item was available, false otherwise.
|
|
*/
|
|
refresh: function() {
|
|
let selectedItem = this.selectedItem;
|
|
if (!selectedItem) {
|
|
return false;
|
|
}
|
|
this._widget.removeAttribute("notice");
|
|
this._widget.setAttribute("label", selectedItem._label);
|
|
this._widget.setAttribute("tooltiptext", selectedItem._value);
|
|
return true;
|
|
},
|
|
|
|
/**
|
|
* Immediately removes the specified item from this container.
|
|
*
|
|
* @param Item aItem
|
|
* The item associated with the element to remove.
|
|
*/
|
|
remove: function(aItem) {
|
|
if (!aItem) {
|
|
return;
|
|
}
|
|
this._widget.removeChild(aItem._target);
|
|
this._untangleItem(aItem);
|
|
},
|
|
|
|
/**
|
|
* Removes the item at the specified index from this container.
|
|
*
|
|
* @param number aIndex
|
|
* The index of the item to remove.
|
|
*/
|
|
removeAt: function(aIndex) {
|
|
this.remove(this.getItemAtIndex(aIndex));
|
|
},
|
|
|
|
/**
|
|
* Removes all items from this container.
|
|
*/
|
|
empty: function() {
|
|
this._preferredValue = this.selectedValue;
|
|
this._widget.selectedItem = null;
|
|
this._widget.removeAllItems();
|
|
this._widget.setAttribute("notice", this.emptyText);
|
|
this._widget.setAttribute("label", this.emptyText);
|
|
this._widget.removeAttribute("tooltiptext");
|
|
|
|
for (let [, item] of this._itemsByElement) {
|
|
this._untangleItem(item);
|
|
}
|
|
|
|
this._itemsByLabel.clear();
|
|
this._itemsByValue.clear();
|
|
this._itemsByElement.clear();
|
|
this._stagedItems.length = 0;
|
|
},
|
|
|
|
/**
|
|
* Does not remove any item in this container. Instead, it overrides the
|
|
* current label to signal that it is unavailable and removes the tooltip.
|
|
*/
|
|
setUnavailable: function() {
|
|
this._widget.setAttribute("notice", this.unavailableText);
|
|
this._widget.setAttribute("label", this.unavailableText);
|
|
this._widget.removeAttribute("tooltiptext");
|
|
},
|
|
|
|
/**
|
|
* The label string automatically added to this container when there are
|
|
* no child nodes present.
|
|
*/
|
|
emptyText: "",
|
|
|
|
/**
|
|
* The label string added to this container when it is marked as unavailable.
|
|
*/
|
|
unavailableText: "",
|
|
|
|
/**
|
|
* Toggles all the items in this container hidden or visible.
|
|
*
|
|
* This does not change the default filtering predicate, so newly inserted
|
|
* items will always be visible. Use WidgetMethods.filterContents if you care.
|
|
*
|
|
* @param boolean aVisibleFlag
|
|
* Specifies the intended visibility.
|
|
*/
|
|
toggleContents: function(aVisibleFlag) {
|
|
for (let [element, item] of this._itemsByElement) {
|
|
element.hidden = !aVisibleFlag;
|
|
}
|
|
},
|
|
|
|
/**
|
|
* Toggles all items in this container hidden or visible based on a predicate.
|
|
*
|
|
* @param function aPredicate [optional]
|
|
* Items are toggled according to the return value of this function,
|
|
* which will become the new default filtering predicate in this container.
|
|
* If unspecified, all items will be toggled visible.
|
|
*/
|
|
filterContents: function(aPredicate = this._currentFilterPredicate) {
|
|
this._currentFilterPredicate = aPredicate;
|
|
|
|
for (let [element, item] of this._itemsByElement) {
|
|
element.hidden = !aPredicate(item);
|
|
}
|
|
},
|
|
|
|
/**
|
|
* Sorts all the items in this container based on a predicate.
|
|
*
|
|
* @param function aPredicate [optional]
|
|
* Items are sorted according to the return value of the function,
|
|
* which will become the new default sorting predicate in this container.
|
|
* If unspecified, all items will be sorted by their label.
|
|
*/
|
|
sortContents: function(aPredicate = this._currentSortPredicate) {
|
|
let sortedItems = this.orderedItems.sort(this._currentSortPredicate = aPredicate);
|
|
|
|
for (let i = 0, len = sortedItems.length; i < len; i++) {
|
|
this.swapItems(this.getItemAtIndex(i), sortedItems[i]);
|
|
}
|
|
},
|
|
|
|
/**
|
|
* Visually swaps two items in this container.
|
|
*
|
|
* @param Item aFirst
|
|
* The first item to be swapped.
|
|
* @param Item aSecond
|
|
* The second item to be swapped.
|
|
*/
|
|
swapItems: function(aFirst, aSecond) {
|
|
if (aFirst == aSecond) { // We're just dandy, thank you.
|
|
return;
|
|
}
|
|
let { _prebuiltTarget: firstPrebuiltTarget, target: firstTarget } = aFirst;
|
|
let { _prebuiltTarget: secondPrebuiltTarget, target: secondTarget } = aSecond;
|
|
|
|
// If the two items were constructed with prebuilt nodes as DocumentFragments,
|
|
// then those DocumentFragments are now empty and need to be reassembled.
|
|
if (firstPrebuiltTarget instanceof Ci.nsIDOMDocumentFragment) {
|
|
for (let node of firstTarget.childNodes) {
|
|
firstPrebuiltTarget.appendChild(node.cloneNode(true));
|
|
}
|
|
}
|
|
if (secondPrebuiltTarget instanceof Ci.nsIDOMDocumentFragment) {
|
|
for (let node of secondTarget.childNodes) {
|
|
secondPrebuiltTarget.appendChild(node.cloneNode(true));
|
|
}
|
|
}
|
|
|
|
// 1. Get the indices of the two items to swap.
|
|
let i = this._indexOfElement(firstTarget);
|
|
let j = this._indexOfElement(secondTarget);
|
|
|
|
// 2. Remeber the selection index, to reselect an item, if necessary.
|
|
let selectedTarget = this._widget.selectedItem;
|
|
let selectedIndex = -1;
|
|
if (selectedTarget == firstTarget) {
|
|
selectedIndex = i;
|
|
} else if (selectedTarget == secondTarget) {
|
|
selectedIndex = j;
|
|
}
|
|
|
|
// 3. Silently nuke both items, nobody needs to know about this.
|
|
this._widget.removeChild(firstTarget);
|
|
this._widget.removeChild(secondTarget);
|
|
this._unlinkItem(aFirst);
|
|
this._unlinkItem(aSecond);
|
|
|
|
// 4. Add the items again, but reversing their indices.
|
|
this._insertItemAt.apply(this, i < j ? [i, aSecond] : [j, aFirst]);
|
|
this._insertItemAt.apply(this, i < j ? [j, aFirst] : [i, aSecond]);
|
|
|
|
// 5. Restore the previous selection, if necessary.
|
|
if (selectedIndex == i) {
|
|
this._widget.selectedItem = aFirst._target;
|
|
} else if (selectedIndex == j) {
|
|
this._widget.selectedItem = aSecond._target;
|
|
}
|
|
},
|
|
|
|
/**
|
|
* Visually swaps two items in this container at specific indices.
|
|
*
|
|
* @param number aFirst
|
|
* The index of the first item to be swapped.
|
|
* @param number aSecond
|
|
* The index of the second item to be swapped.
|
|
*/
|
|
swapItemsAtIndices: function(aFirst, aSecond) {
|
|
this.swapItems(this.getItemAtIndex(aFirst), this.getItemAtIndex(aSecond));
|
|
},
|
|
|
|
/**
|
|
* Checks whether an item with the specified label is among the elements
|
|
* shown in this container.
|
|
*
|
|
* @param string aLabel
|
|
* The item's label.
|
|
* @return boolean
|
|
* True if the label is known, false otherwise.
|
|
*/
|
|
containsLabel: function(aLabel) {
|
|
return this._itemsByLabel.has(aLabel) ||
|
|
this._stagedItems.some(({ item }) => item._label == aLabel);
|
|
},
|
|
|
|
/**
|
|
* Checks whether an item with the specified value is among the elements
|
|
* shown in this container.
|
|
*
|
|
* @param string aValue
|
|
* The item's value.
|
|
* @return boolean
|
|
* True if the value is known, false otherwise.
|
|
*/
|
|
containsValue: function(aValue) {
|
|
return this._itemsByValue.has(aValue) ||
|
|
this._stagedItems.some(({ item }) => item._value == aValue);
|
|
},
|
|
|
|
/**
|
|
* Gets the "preferred value". This is the latest selected item's value,
|
|
* remembered just before emptying this container.
|
|
* @return string
|
|
*/
|
|
get preferredValue() this._preferredValue,
|
|
|
|
/**
|
|
* Retrieves the item associated with the selected element.
|
|
* @return Item
|
|
*/
|
|
get selectedItem() {
|
|
let selectedElement = this._widget.selectedItem;
|
|
if (selectedElement) {
|
|
return this._itemsByElement.get(selectedElement);
|
|
}
|
|
return null;
|
|
},
|
|
|
|
/**
|
|
* Retrieves the selected element's index in this container.
|
|
* @return number
|
|
*/
|
|
get selectedIndex() {
|
|
let selectedElement = this._widget.selectedItem;
|
|
if (selectedElement) {
|
|
return this._indexOfElement(selectedElement);
|
|
}
|
|
return -1;
|
|
},
|
|
|
|
/**
|
|
* Retrieves the label of the selected element.
|
|
* @return string
|
|
*/
|
|
get selectedLabel() {
|
|
let selectedElement = this._widget.selectedItem;
|
|
if (selectedElement) {
|
|
return this._itemsByElement.get(selectedElement)._label;
|
|
}
|
|
return "";
|
|
},
|
|
|
|
/**
|
|
* Retrieves the value of the selected element.
|
|
* @return string
|
|
*/
|
|
get selectedValue() {
|
|
let selectedElement = this._widget.selectedItem;
|
|
if (selectedElement) {
|
|
return this._itemsByElement.get(selectedElement)._value;
|
|
}
|
|
return "";
|
|
},
|
|
|
|
/**
|
|
* Selects the element with the entangled item in this container.
|
|
* @param Item | function aItem
|
|
*/
|
|
set selectedItem(aItem) {
|
|
// A predicate is allowed to select a specific item.
|
|
// If no item is matched, then the current selection is removed.
|
|
if (typeof aItem == "function") {
|
|
aItem = this.getItemForPredicate(aItem);
|
|
}
|
|
|
|
// A falsy item is allowed to invalidate the current selection.
|
|
let targetElement = aItem ? aItem._target : null;
|
|
let prevElement = this._widget.selectedItem;
|
|
|
|
// Make sure the currently selected item's target element is also focused.
|
|
if (this.autoFocusOnSelection && targetElement) {
|
|
targetElement.focus();
|
|
}
|
|
|
|
// Prevent selecting the same item again and avoid dispatching
|
|
// a redundant selection event, so return early.
|
|
if (targetElement == prevElement) {
|
|
return;
|
|
}
|
|
this._widget.selectedItem = targetElement;
|
|
ViewHelpers.dispatchEvent(targetElement || prevElement, "select", aItem);
|
|
|
|
// Updates this container to reflect the information provided by the
|
|
// currently selected item.
|
|
this.refresh();
|
|
},
|
|
|
|
/**
|
|
* Selects the element at the specified index in this container.
|
|
* @param number aIndex
|
|
*/
|
|
set selectedIndex(aIndex) {
|
|
let targetElement = this._widget.getItemAtIndex(aIndex);
|
|
if (targetElement) {
|
|
this.selectedItem = this._itemsByElement.get(targetElement);
|
|
return;
|
|
}
|
|
this.selectedItem = null;
|
|
},
|
|
|
|
/**
|
|
* Selects the element with the specified label in this container.
|
|
* @param string aLabel
|
|
*/
|
|
set selectedLabel(aLabel)
|
|
this.selectedItem = this._itemsByLabel.get(aLabel),
|
|
|
|
/**
|
|
* Selects the element with the specified value in this container.
|
|
* @param string aValue
|
|
*/
|
|
set selectedValue(aValue)
|
|
this.selectedItem = this._itemsByValue.get(aValue),
|
|
|
|
/**
|
|
* Focus this container the first time an element is inserted?
|
|
*
|
|
* If this flag is set to true, then when the first item is inserted in
|
|
* this container (and thus it's the only item available), its corresponding
|
|
* target element is focused as well.
|
|
*/
|
|
autoFocusOnFirstItem: true,
|
|
|
|
/**
|
|
* Focus on selection?
|
|
*
|
|
* If this flag is set to true, then whenever an item is selected in
|
|
* this container (e.g. via the selectedIndex or selectedItem setters),
|
|
* its corresponding target element is focused as well.
|
|
*
|
|
* You can disable this flag, for example, to maintain a certain node
|
|
* focused but visually indicate a different selection in this container.
|
|
*/
|
|
autoFocusOnSelection: true,
|
|
|
|
/**
|
|
* Focus on input (e.g. mouse click)?
|
|
*
|
|
* If this flag is set to true, then whenever an item receives user input in
|
|
* this container, its corresponding target element is focused as well.
|
|
*/
|
|
autoFocusOnInput: true,
|
|
|
|
/**
|
|
* The number of elements in this container to jump when Page Up or Page Down
|
|
* keys are pressed. If falsy, then the page size will be based on the
|
|
* number of visible items in the container.
|
|
*/
|
|
pageSize: 0,
|
|
|
|
/**
|
|
* Focuses the first visible item in this container.
|
|
*/
|
|
focusFirstVisibleItem: function() {
|
|
this.focusItemAtDelta(-this.itemCount);
|
|
},
|
|
|
|
/**
|
|
* Focuses the last visible item in this container.
|
|
*/
|
|
focusLastVisibleItem: function() {
|
|
this.focusItemAtDelta(+this.itemCount);
|
|
},
|
|
|
|
/**
|
|
* Focuses the next item in this container.
|
|
*/
|
|
focusNextItem: function() {
|
|
this.focusItemAtDelta(+1);
|
|
},
|
|
|
|
/**
|
|
* Focuses the previous item in this container.
|
|
*/
|
|
focusPrevItem: function() {
|
|
this.focusItemAtDelta(-1);
|
|
},
|
|
|
|
/**
|
|
* Focuses another item in this container based on the index distance
|
|
* from the currently focused item.
|
|
*
|
|
* @param number aDelta
|
|
* A scalar specifying by how many items should the selection change.
|
|
*/
|
|
focusItemAtDelta: function(aDelta) {
|
|
// Make sure the currently selected item is also focused, so that the
|
|
// command dispatcher mechanism has a relative node to work with.
|
|
// If there's no selection, just select an item at a corresponding index
|
|
// (e.g. the first item in this container if aDelta <= 1).
|
|
let selectedElement = this._widget.selectedItem;
|
|
if (selectedElement) {
|
|
selectedElement.focus();
|
|
} else {
|
|
this.selectedIndex = Math.max(0, aDelta - 1);
|
|
return;
|
|
}
|
|
|
|
let direction = aDelta > 0 ? "advanceFocus" : "rewindFocus";
|
|
let distance = Math.abs(Math[aDelta > 0 ? "ceil" : "floor"](aDelta));
|
|
while (distance--) {
|
|
if (!this._focusChange(direction)) {
|
|
break; // Out of bounds.
|
|
}
|
|
}
|
|
|
|
// Synchronize the selected item as being the currently focused element.
|
|
this.selectedItem = this.getItemForElement(this._focusedElement);
|
|
},
|
|
|
|
/**
|
|
* Focuses the next or previous item in this container.
|
|
*
|
|
* @param string aDirection
|
|
* Either "advanceFocus" or "rewindFocus".
|
|
* @return boolean
|
|
* False if the focus went out of bounds and the first or last item
|
|
* in this container was focused instead.
|
|
*/
|
|
_focusChange: function(aDirection) {
|
|
let commandDispatcher = this._commandDispatcher;
|
|
let prevFocusedElement = commandDispatcher.focusedElement;
|
|
|
|
commandDispatcher.suppressFocusScroll = true;
|
|
commandDispatcher[aDirection]();
|
|
|
|
// Make sure the newly focused item is a part of this container.
|
|
// If the focus goes out of bounds, revert the previously focused item.
|
|
if (!this.getItemForElement(commandDispatcher.focusedElement)) {
|
|
prevFocusedElement.focus();
|
|
return false;
|
|
}
|
|
// Focus remained within bounds.
|
|
return true;
|
|
},
|
|
|
|
/**
|
|
* Gets the command dispatcher instance associated with this container's DOM.
|
|
* If there are no items displayed in this container, null is returned.
|
|
* @return nsIDOMXULCommandDispatcher | null
|
|
*/
|
|
get _commandDispatcher() {
|
|
if (this._cachedCommandDispatcher) {
|
|
return this._cachedCommandDispatcher;
|
|
}
|
|
let someElement = this._widget.getItemAtIndex(0);
|
|
if (someElement) {
|
|
let commandDispatcher = someElement.ownerDocument.commandDispatcher;
|
|
return this._cachedCommandDispatcher = commandDispatcher;
|
|
}
|
|
return null;
|
|
},
|
|
|
|
/**
|
|
* Gets the currently focused element in this container.
|
|
*
|
|
* @return nsIDOMNode
|
|
* The focused element, or null if nothing is found.
|
|
*/
|
|
get _focusedElement() {
|
|
let commandDispatcher = this._commandDispatcher;
|
|
if (commandDispatcher) {
|
|
return commandDispatcher.focusedElement;
|
|
}
|
|
return null;
|
|
},
|
|
|
|
/**
|
|
* Gets the item in the container having the specified index.
|
|
*
|
|
* @param number aIndex
|
|
* The index used to identify the element.
|
|
* @return Item
|
|
* The matched item, or null if nothing is found.
|
|
*/
|
|
getItemAtIndex: function(aIndex) {
|
|
return this.getItemForElement(this._widget.getItemAtIndex(aIndex));
|
|
},
|
|
|
|
/**
|
|
* Gets the item in the container having the specified label.
|
|
*
|
|
* @param string aLabel
|
|
* The label used to identify the element.
|
|
* @return Item
|
|
* The matched item, or null if nothing is found.
|
|
*/
|
|
getItemByLabel: function(aLabel) {
|
|
return this._itemsByLabel.get(aLabel);
|
|
},
|
|
|
|
/**
|
|
* Gets the item in the container having the specified value.
|
|
*
|
|
* @param string aValue
|
|
* The value used to identify the element.
|
|
* @return Item
|
|
* The matched item, or null if nothing is found.
|
|
*/
|
|
getItemByValue: function(aValue) {
|
|
return this._itemsByValue.get(aValue);
|
|
},
|
|
|
|
/**
|
|
* Gets the item in the container associated with the specified element.
|
|
*
|
|
* @param nsIDOMNode aElement
|
|
* The element used to identify the item.
|
|
* @return Item
|
|
* The matched item, or null if nothing is found.
|
|
*/
|
|
getItemForElement: function(aElement) {
|
|
while (aElement) {
|
|
let item = this._itemsByElement.get(aElement);
|
|
if (item) {
|
|
return item;
|
|
}
|
|
aElement = aElement.parentNode;
|
|
}
|
|
return null;
|
|
},
|
|
|
|
/**
|
|
* Gets a visible item in this container validating a specified predicate.
|
|
*
|
|
* @param function aPredicate
|
|
* The first item which validates this predicate is returned
|
|
* @return Item
|
|
* The matched item, or null if nothing is found.
|
|
*/
|
|
getItemForPredicate: function(aPredicate, aOwner = this) {
|
|
for (let [element, item] of aOwner._itemsByElement) {
|
|
let match;
|
|
if (aPredicate(item) && !element.hidden) {
|
|
match = item;
|
|
} else {
|
|
match = this.getItemForPredicate(aPredicate, item);
|
|
}
|
|
if (match) {
|
|
return match;
|
|
}
|
|
}
|
|
return null;
|
|
},
|
|
|
|
/**
|
|
* Finds the index of an item in the container.
|
|
*
|
|
* @param Item aItem
|
|
* The item get the index for.
|
|
* @return number
|
|
* The index of the matched item, or -1 if nothing is found.
|
|
*/
|
|
indexOfItem: function(aItem) {
|
|
return this._indexOfElement(aItem._target);
|
|
},
|
|
|
|
/**
|
|
* Finds the index of an element in the container.
|
|
*
|
|
* @param nsIDOMNode aElement
|
|
* The element get the index for.
|
|
* @return number
|
|
* The index of the matched element, or -1 if nothing is found.
|
|
*/
|
|
_indexOfElement: function(aElement) {
|
|
for (let i = 0; i < this._itemsByElement.size; i++) {
|
|
if (this._widget.getItemAtIndex(i) == aElement) {
|
|
return i;
|
|
}
|
|
}
|
|
return -1;
|
|
},
|
|
|
|
/**
|
|
* Gets the total number of items in this container.
|
|
* @return number
|
|
*/
|
|
get itemCount() this._itemsByElement.size,
|
|
|
|
/**
|
|
* Returns a list of items in this container, in no particular order.
|
|
* @return array
|
|
*/
|
|
get items() {
|
|
let items = [];
|
|
for (let [, item] of this._itemsByElement) {
|
|
items.push(item);
|
|
}
|
|
return items;
|
|
},
|
|
|
|
/**
|
|
* Returns a list of labels in this container, in no particular order.
|
|
* @return array
|
|
*/
|
|
get labels() {
|
|
let labels = [];
|
|
for (let [label] of this._itemsByLabel) {
|
|
labels.push(label);
|
|
}
|
|
return labels;
|
|
},
|
|
|
|
/**
|
|
* Returns a list of values in this container, in no particular order.
|
|
* @return array
|
|
*/
|
|
get values() {
|
|
let values = [];
|
|
for (let [value] of this._itemsByValue) {
|
|
values.push(value);
|
|
}
|
|
return values;
|
|
},
|
|
|
|
/**
|
|
* Returns a list of all the visible (non-hidden) items in this container,
|
|
* in no particular order.
|
|
* @return array
|
|
*/
|
|
get visibleItems() {
|
|
let items = [];
|
|
for (let [element, item] of this._itemsByElement) {
|
|
if (!element.hidden) {
|
|
items.push(item);
|
|
}
|
|
}
|
|
return items;
|
|
},
|
|
|
|
/**
|
|
* Returns a list of all items in this container, in the displayed order.
|
|
* @return array
|
|
*/
|
|
get orderedItems() {
|
|
let items = [];
|
|
let itemCount = this.itemCount;
|
|
for (let i = 0; i < itemCount; i++) {
|
|
items.push(this.getItemAtIndex(i));
|
|
}
|
|
return items;
|
|
},
|
|
|
|
/**
|
|
* Returns a list of all the visible (non-hidden) items in this container,
|
|
* in the displayed order
|
|
* @return array
|
|
*/
|
|
get orderedVisibleItems() {
|
|
let items = [];
|
|
let itemCount = this.itemCount;
|
|
for (let i = 0; i < itemCount; i++) {
|
|
let item = this.getItemAtIndex(i);
|
|
if (!item._target.hidden) {
|
|
items.push(item);
|
|
}
|
|
}
|
|
return items;
|
|
},
|
|
|
|
/**
|
|
* Specifies the required conditions for an item to be considered unique.
|
|
* Possible values:
|
|
* - 1: label AND value are different from all other items
|
|
* - 2: label OR value are different from all other items
|
|
* - 3: only label is required to be different
|
|
* - 4: only value is required to be different
|
|
*/
|
|
uniquenessQualifier: 1,
|
|
|
|
/**
|
|
* Checks if an item is unique in this container.
|
|
*
|
|
* @param Item aItem
|
|
* The item for which to verify uniqueness.
|
|
* @return boolean
|
|
* True if the item is unique, false otherwise.
|
|
*/
|
|
isUnique: function(aItem) {
|
|
switch (this.uniquenessQualifier) {
|
|
case 1:
|
|
return !this._itemsByLabel.has(aItem._label) &&
|
|
!this._itemsByValue.has(aItem._value);
|
|
case 2:
|
|
return !this._itemsByLabel.has(aItem._label) ||
|
|
!this._itemsByValue.has(aItem._value);
|
|
case 3:
|
|
return !this._itemsByLabel.has(aItem._label);
|
|
case 4:
|
|
return !this._itemsByValue.has(aItem._value);
|
|
}
|
|
return false;
|
|
},
|
|
|
|
/**
|
|
* Checks if an item is eligible for this container.
|
|
*
|
|
* @param Item aItem
|
|
* The item for which to verify eligibility.
|
|
* @return boolean
|
|
* True if the item is eligible, false otherwise.
|
|
*/
|
|
isEligible: function(aItem) {
|
|
let isUnique = this.isUnique(aItem);
|
|
let isPrebuilt = !!aItem._prebuiltTarget;
|
|
let isDegenerate = aItem._label == "undefined" || aItem._label == "null" ||
|
|
aItem._value == "undefined" || aItem._value == "null";
|
|
|
|
return isPrebuilt || (isUnique && !isDegenerate);
|
|
},
|
|
|
|
/**
|
|
* Finds the expected item index in this container based on the default
|
|
* sort predicate.
|
|
*
|
|
* @param Item aItem
|
|
* The item for which to get the expected index.
|
|
* @return number
|
|
* The expected item index.
|
|
*/
|
|
_findExpectedIndexFor: function(aItem) {
|
|
let itemCount = this.itemCount;
|
|
|
|
for (let i = 0; i < itemCount; i++) {
|
|
if (this._currentSortPredicate(this.getItemAtIndex(i), aItem) > 0) {
|
|
return i;
|
|
}
|
|
}
|
|
return itemCount;
|
|
},
|
|
|
|
/**
|
|
* Immediately inserts an item in this container at the specified index.
|
|
*
|
|
* @param number aIndex
|
|
* The position in the container intended for this item.
|
|
* @param Item aItem
|
|
* An object containing a label and a value property (at least).
|
|
* @param object aOptions [optional]
|
|
* Additional options or flags supported by this operation:
|
|
* - node: allows the insertion of prebuilt nodes instead of labels
|
|
* - relaxed: true if this container should allow dupes & degenerates
|
|
* - attributes: a batch of attributes set to the displayed element
|
|
* - finalize: function when the item is untangled (removed)
|
|
* @return Item
|
|
* The item associated with the displayed element, null if rejected.
|
|
*/
|
|
_insertItemAt: function(aIndex, aItem, aOptions = {}) {
|
|
// Relaxed nodes may be appended without verifying their eligibility.
|
|
if (!aOptions.relaxed && !this.isEligible(aItem)) {
|
|
return null;
|
|
}
|
|
|
|
// Entangle the item with the newly inserted node.
|
|
this._entangleItem(aItem, this._widget.insertItemAt(aIndex,
|
|
aItem._prebuiltTarget || aItem._label, // Allow the insertion of prebuilt nodes.
|
|
aItem._value,
|
|
aItem._description,
|
|
aItem.attachment));
|
|
|
|
// Handle any additional options after entangling the item.
|
|
if (!this._currentFilterPredicate(aItem)) {
|
|
aItem._target.hidden = true;
|
|
}
|
|
if (this.autoFocusOnFirstItem && this._itemsByElement.size == 1) {
|
|
aItem._target.focus();
|
|
}
|
|
if (aOptions.attributes) {
|
|
aOptions.attributes.forEach(e => aItem._target.setAttribute(e[0], e[1]));
|
|
}
|
|
if (aOptions.finalize) {
|
|
aItem.finalize = aOptions.finalize;
|
|
}
|
|
|
|
// Return the item associated with the displayed element.
|
|
return aItem;
|
|
},
|
|
|
|
/**
|
|
* Entangles an item (model) with a displayed node element (view).
|
|
*
|
|
* @param Item aItem
|
|
* The item describing a target element.
|
|
* @param nsIDOMNode aElement
|
|
* The element displaying the item.
|
|
*/
|
|
_entangleItem: function(aItem, aElement) {
|
|
this._itemsByLabel.set(aItem._label, aItem);
|
|
this._itemsByValue.set(aItem._value, aItem);
|
|
this._itemsByElement.set(aElement, aItem);
|
|
aItem._target = aElement;
|
|
},
|
|
|
|
/**
|
|
* Untangles an item (model) from a displayed node element (view).
|
|
*
|
|
* @param Item aItem
|
|
* The item describing a target element.
|
|
*/
|
|
_untangleItem: function(aItem) {
|
|
if (aItem.finalize) {
|
|
aItem.finalize(aItem);
|
|
}
|
|
for (let childItem in aItem) {
|
|
aItem.remove(childItem);
|
|
}
|
|
|
|
this._unlinkItem(aItem);
|
|
aItem._prebuiltTarget = null;
|
|
aItem._target = null;
|
|
},
|
|
|
|
/**
|
|
* Deletes an item from the its parent's storage maps.
|
|
*
|
|
* @param Item aItem
|
|
* The item describing a target element.
|
|
*/
|
|
_unlinkItem: function(aItem) {
|
|
this._itemsByLabel.delete(aItem._label);
|
|
this._itemsByValue.delete(aItem._value);
|
|
this._itemsByElement.delete(aItem._target);
|
|
},
|
|
|
|
/**
|
|
* The keyPress event listener for this container.
|
|
* @param string aName
|
|
* @param KeyboardEvent aEvent
|
|
*/
|
|
_onWidgetKeyPress: function(aName, aEvent) {
|
|
// Prevent scrolling when pressing navigation keys.
|
|
ViewHelpers.preventScrolling(aEvent);
|
|
|
|
switch (aEvent.keyCode) {
|
|
case aEvent.DOM_VK_UP:
|
|
case aEvent.DOM_VK_LEFT:
|
|
this.focusPrevItem();
|
|
return;
|
|
case aEvent.DOM_VK_DOWN:
|
|
case aEvent.DOM_VK_RIGHT:
|
|
this.focusNextItem();
|
|
return;
|
|
case aEvent.DOM_VK_PAGE_UP:
|
|
this.focusItemAtDelta(-(this.pageSize || (this.itemCount / PAGE_SIZE_ITEM_COUNT_RATIO)));
|
|
return;
|
|
case aEvent.DOM_VK_PAGE_DOWN:
|
|
this.focusItemAtDelta(+(this.pageSize || (this.itemCount / PAGE_SIZE_ITEM_COUNT_RATIO)));
|
|
return;
|
|
case aEvent.DOM_VK_HOME:
|
|
this.focusFirstVisibleItem();
|
|
return;
|
|
case aEvent.DOM_VK_END:
|
|
this.focusLastVisibleItem();
|
|
return;
|
|
}
|
|
},
|
|
|
|
/**
|
|
* The keyPress event listener for this container.
|
|
* @param string aName
|
|
* @param MouseEvent aEvent
|
|
*/
|
|
_onWidgetMousePress: function(aName, aEvent) {
|
|
if (aEvent.button != 0) {
|
|
// Only allow left-click to trigger this event.
|
|
return;
|
|
}
|
|
|
|
let item = this.getItemForElement(aEvent.target);
|
|
if (item) {
|
|
// The container is not empty and we clicked on an actual item.
|
|
this.selectedItem = item;
|
|
// Make sure the current event's target element is also focused.
|
|
this.autoFocusOnInput && item._target.focus();
|
|
}
|
|
},
|
|
|
|
/**
|
|
* The predicate used when filtering items. By default, all items in this
|
|
* view are visible.
|
|
*
|
|
* @param Item aItem
|
|
* The item passing through the filter.
|
|
* @return boolean
|
|
* True if the item should be visible, false otherwise.
|
|
*/
|
|
_currentFilterPredicate: function(aItem) {
|
|
return true;
|
|
},
|
|
|
|
/**
|
|
* The predicate used when sorting items. By default, items in this view
|
|
* are sorted by their label.
|
|
*
|
|
* @param Item aFirst
|
|
* The first item used in the comparison.
|
|
* @param Item aSecond
|
|
* The second item used in the comparison.
|
|
* @return number
|
|
* -1 to sort aFirst to a lower index than aSecond
|
|
* 0 to leave aFirst and aSecond unchanged with respect to each other
|
|
* 1 to sort aSecond to a lower index than aFirst
|
|
*/
|
|
_currentSortPredicate: function(aFirst, aSecond) {
|
|
return +(aFirst._label.toLowerCase() > aSecond._label.toLowerCase());
|
|
},
|
|
|
|
_widget: null,
|
|
_preferredValue: null,
|
|
_cachedCommandDispatcher: null
|
|
};
|
|
|
|
/**
|
|
* A generator-iterator over all the items in this container.
|
|
*/
|
|
Item.prototype.__iterator__ =
|
|
WidgetMethods.__iterator__ = function() {
|
|
for (let [, item] of this._itemsByElement) {
|
|
yield item;
|
|
}
|
|
};
|