forked from mirrors/gecko-dev
302 lines
9.1 KiB
JavaScript
302 lines
9.1 KiB
JavaScript
/* vim:set ts=2 sw=2 sts=2 et: */
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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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this.EXPORTED_SYMBOLS = ["SplitView"];
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/* this must be kept in sync with CSS (ie. splitview.css) */
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const LANDSCAPE_MEDIA_QUERY = "(min-width: 551px)";
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let bindings = new WeakMap();
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/**
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* SplitView constructor
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*
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* Initialize the split view UI on an existing DOM element.
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*
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* A split view contains items, each of those having one summary and one details
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* elements.
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* It is adaptive as it behaves similarly to a richlistbox when there the aspect
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* ratio is narrow or as a pair listbox-box otherwise.
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*
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* @param DOMElement aRoot
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* @see appendItem
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*/
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this.SplitView = function SplitView(aRoot)
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{
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this._root = aRoot;
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this._controller = aRoot.querySelector(".splitview-controller");
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this._nav = aRoot.querySelector(".splitview-nav");
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this._side = aRoot.querySelector(".splitview-side-details");
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this._activeSummary = null
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this._mql = aRoot.ownerDocument.defaultView.matchMedia(LANDSCAPE_MEDIA_QUERY);
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// items list focus and search-on-type handling
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this._nav.addEventListener("keydown", (aEvent) => {
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function getFocusedItemWithin(nav) {
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let node = nav.ownerDocument.activeElement;
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while (node && node.parentNode != nav) {
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node = node.parentNode;
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}
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return node;
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}
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// do not steal focus from inside iframes or textboxes
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if (aEvent.target.ownerDocument != this._nav.ownerDocument ||
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aEvent.target.tagName == "input" ||
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aEvent.target.tagName == "textbox" ||
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aEvent.target.tagName == "textarea" ||
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aEvent.target.classList.contains("textbox")) {
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return false;
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}
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// handle keyboard navigation within the items list
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let newFocusOrdinal;
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if (aEvent.keyCode == aEvent.DOM_VK_PAGE_UP ||
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aEvent.keyCode == aEvent.DOM_VK_HOME) {
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newFocusOrdinal = 0;
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} else if (aEvent.keyCode == aEvent.DOM_VK_PAGE_DOWN ||
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aEvent.keyCode == aEvent.DOM_VK_END) {
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newFocusOrdinal = this._nav.childNodes.length - 1;
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} else if (aEvent.keyCode == aEvent.DOM_VK_UP) {
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newFocusOrdinal = getFocusedItemWithin(this._nav).getAttribute("data-ordinal");
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newFocusOrdinal--;
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} else if (aEvent.keyCode == aEvent.DOM_VK_DOWN) {
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newFocusOrdinal = getFocusedItemWithin(this._nav).getAttribute("data-ordinal");
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newFocusOrdinal++;
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}
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if (newFocusOrdinal !== undefined) {
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aEvent.stopPropagation();
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let el = this.getSummaryElementByOrdinal(newFocusOrdinal);
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if (el) {
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el.focus();
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}
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return false;
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}
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}, false);
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}
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SplitView.prototype = {
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/**
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* Retrieve whether the UI currently has a landscape orientation.
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*
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* @return boolean
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*/
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get isLandscape() this._mql.matches,
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/**
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* Retrieve the root element.
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*
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* @return DOMElement
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*/
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get rootElement() this._root,
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/**
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* Retrieve the active item's summary element or null if there is none.
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*
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* @return DOMElement
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*/
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get activeSummary() this._activeSummary,
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/**
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* Set the active item's summary element.
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*
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* @param DOMElement aSummary
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*/
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set activeSummary(aSummary)
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{
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if (aSummary == this._activeSummary) {
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return;
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}
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if (this._activeSummary) {
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let binding = bindings.get(this._activeSummary);
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if (binding.onHide) {
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binding.onHide(this._activeSummary, binding._details, binding.data);
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}
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this._activeSummary.classList.remove("splitview-active");
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binding._details.classList.remove("splitview-active");
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}
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if (!aSummary) {
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return;
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}
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let binding = bindings.get(aSummary);
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aSummary.classList.add("splitview-active");
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binding._details.classList.add("splitview-active");
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this._activeSummary = aSummary;
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if (binding.onShow) {
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binding.onShow(aSummary, binding._details, binding.data);
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}
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},
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/**
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* Retrieve the active item's details element or null if there is none.
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* @return DOMElement
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*/
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get activeDetails()
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{
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let summary = this.activeSummary;
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return summary ? bindings.get(summary)._details : null;
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},
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/**
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* Retrieve the summary element for a given ordinal.
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*
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* @param number aOrdinal
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* @return DOMElement
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* Summary element with given ordinal or null if not found.
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* @see appendItem
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*/
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getSummaryElementByOrdinal: function SEC_getSummaryElementByOrdinal(aOrdinal)
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{
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return this._nav.querySelector("* > li[data-ordinal='" + aOrdinal + "']");
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},
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/**
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* Append an item to the split view.
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*
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* @param DOMElement aSummary
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* The summary element for the item.
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* @param DOMElement aDetails
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* The details element for the item.
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* @param object aOptions
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* Optional object that defines custom behavior and data for the item.
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* All properties are optional :
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* - function(DOMElement summary, DOMElement details, object data) onCreate
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* Called when the item has been added.
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* - function(summary, details, data) onShow
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* Called when the item is shown/active.
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* - function(summary, details, data) onHide
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* Called when the item is hidden/inactive.
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* - function(summary, details, data) onDestroy
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* Called when the item has been removed.
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* - object data
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* Object to pass to the callbacks above.
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* - number ordinal
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* Items with a lower ordinal are displayed before those with a
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* higher ordinal.
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*/
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appendItem: function ASV_appendItem(aSummary, aDetails, aOptions)
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{
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let binding = aOptions || {};
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binding._summary = aSummary;
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binding._details = aDetails;
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bindings.set(aSummary, binding);
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this._nav.appendChild(aSummary);
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aSummary.addEventListener("click", (aEvent) => {
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aEvent.stopPropagation();
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this.activeSummary = aSummary;
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}, false);
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this._side.appendChild(aDetails);
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if (binding.onCreate) {
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// queue onCreate handler
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this._root.ownerDocument.defaultView.setTimeout(function () {
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binding.onCreate(aSummary, aDetails, binding.data);
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}, 0);
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}
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},
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/**
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* Append an item to the split view according to two template elements
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* (one for the item's summary and the other for the item's details).
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*
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* @param string aName
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* Name of the template elements to instantiate.
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* Requires two (hidden) DOM elements with id "splitview-tpl-summary-"
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* and "splitview-tpl-details-" suffixed with aName.
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* @param object aOptions
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* Optional object that defines custom behavior and data for the item.
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* See appendItem for full description.
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* @return object{summary:,details:}
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* Object with the new DOM elements created for summary and details.
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* @see appendItem
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*/
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appendTemplatedItem: function ASV_appendTemplatedItem(aName, aOptions)
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{
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aOptions = aOptions || {};
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let summary = this._root.querySelector("#splitview-tpl-summary-" + aName);
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let details = this._root.querySelector("#splitview-tpl-details-" + aName);
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summary = summary.cloneNode(true);
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summary.id = "";
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if (aOptions.ordinal !== undefined) { // can be zero
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summary.style.MozBoxOrdinalGroup = aOptions.ordinal;
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summary.setAttribute("data-ordinal", aOptions.ordinal);
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}
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details = details.cloneNode(true);
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details.id = "";
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this.appendItem(summary, details, aOptions);
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return {summary: summary, details: details};
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},
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/**
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* Remove an item from the split view.
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*
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* @param DOMElement aSummary
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* Summary element of the item to remove.
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*/
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removeItem: function ASV_removeItem(aSummary)
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{
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if (aSummary == this._activeSummary) {
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this.activeSummary = null;
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}
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let binding = bindings.get(aSummary);
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aSummary.parentNode.removeChild(aSummary);
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binding._details.parentNode.removeChild(binding._details);
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if (binding.onDestroy) {
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binding.onDestroy(aSummary, binding._details, binding.data);
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}
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},
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/**
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* Remove all items from the split view.
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*/
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removeAll: function ASV_removeAll()
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{
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while (this._nav.hasChildNodes()) {
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this.removeItem(this._nav.firstChild);
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}
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},
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/**
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* Set the item's CSS class name.
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* This sets the class on both the summary and details elements, retaining
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* any SplitView-specific classes.
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*
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* @param DOMElement aSummary
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* Summary element of the item to set.
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* @param string aClassName
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* One or more space-separated CSS classes.
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*/
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setItemClassName: function ASV_setItemClassName(aSummary, aClassName)
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{
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let binding = bindings.get(aSummary);
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let viewSpecific;
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viewSpecific = aSummary.className.match(/(splitview\-[\w-]+)/g);
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viewSpecific = viewSpecific ? viewSpecific.join(" ") : "";
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aSummary.className = viewSpecific + " " + aClassName;
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viewSpecific = binding._details.className.match(/(splitview\-[\w-]+)/g);
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viewSpecific = viewSpecific ? viewSpecific.join(" ") : "";
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binding._details.className = viewSpecific + " " + aClassName;
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},
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};
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