gecko-dev/devtools/client/shared/SplitView.jsm

313 строки
9.2 KiB
JavaScript

/* vim:set ts=2 sw=2 sts=2 et: */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
"use strict";
const Cu = Components.utils;
const {require} = Cu.import("resource://devtools/shared/Loader.jsm", {});
const {KeyCodes} = require("devtools/client/shared/keycodes");
this.EXPORTED_SYMBOLS = ["SplitView"];
/* this must be kept in sync with CSS (ie. splitview.css) */
const LANDSCAPE_MEDIA_QUERY = "(min-width: 701px)";
var bindings = new WeakMap();
/**
* SplitView constructor
*
* Initialize the split view UI on an existing DOM element.
*
* A split view contains items, each of those having one summary and one details
* elements.
* It is adaptive as it behaves similarly to a richlistbox when there the aspect
* ratio is narrow or as a pair listbox-box otherwise.
*
* @param DOMElement aRoot
* @see appendItem
*/
this.SplitView = function SplitView(aRoot)
{
this._root = aRoot;
this._controller = aRoot.querySelector(".splitview-controller");
this._nav = aRoot.querySelector(".splitview-nav");
this._side = aRoot.querySelector(".splitview-side-details");
this._activeSummary = null;
this._mql = aRoot.ownerDocument.defaultView.matchMedia(LANDSCAPE_MEDIA_QUERY);
// items list focus and search-on-type handling
this._nav.addEventListener("keydown", (aEvent) => {
function getFocusedItemWithin(nav) {
let node = nav.ownerDocument.activeElement;
while (node && node.parentNode != nav) {
node = node.parentNode;
}
return node;
}
// do not steal focus from inside iframes or textboxes
if (aEvent.target.ownerDocument != this._nav.ownerDocument ||
aEvent.target.tagName == "input" ||
aEvent.target.tagName == "textbox" ||
aEvent.target.tagName == "textarea" ||
aEvent.target.classList.contains("textbox")) {
return false;
}
// handle keyboard navigation within the items list
let newFocusOrdinal;
if (aEvent.keyCode == KeyCodes.DOM_VK_PAGE_UP ||
aEvent.keyCode == KeyCodes.DOM_VK_HOME) {
newFocusOrdinal = 0;
} else if (aEvent.keyCode == KeyCodes.DOM_VK_PAGE_DOWN ||
aEvent.keyCode == KeyCodes.DOM_VK_END) {
newFocusOrdinal = this._nav.childNodes.length - 1;
} else if (aEvent.keyCode == KeyCodes.DOM_VK_UP) {
newFocusOrdinal = getFocusedItemWithin(this._nav).getAttribute("data-ordinal");
newFocusOrdinal--;
} else if (aEvent.keyCode == KeyCodes.DOM_VK_DOWN) {
newFocusOrdinal = getFocusedItemWithin(this._nav).getAttribute("data-ordinal");
newFocusOrdinal++;
}
if (newFocusOrdinal !== undefined) {
aEvent.stopPropagation();
let el = this.getSummaryElementByOrdinal(newFocusOrdinal);
if (el) {
el.focus();
}
return false;
}
});
};
SplitView.prototype = {
/**
* Retrieve whether the UI currently has a landscape orientation.
*
* @return boolean
*/
get isLandscape()
{
return this._mql.matches;
},
/**
* Retrieve the root element.
*
* @return DOMElement
*/
get rootElement()
{
return this._root;
},
/**
* Retrieve the active item's summary element or null if there is none.
*
* @return DOMElement
*/
get activeSummary()
{
return this._activeSummary;
},
/**
* Set the active item's summary element.
*
* @param DOMElement aSummary
*/
set activeSummary(aSummary)
{
if (aSummary == this._activeSummary) {
return;
}
if (this._activeSummary) {
let binding = bindings.get(this._activeSummary);
if (binding.onHide) {
binding.onHide(this._activeSummary, binding._details, binding.data);
}
this._activeSummary.classList.remove("splitview-active");
binding._details.classList.remove("splitview-active");
}
if (!aSummary) {
return;
}
let binding = bindings.get(aSummary);
aSummary.classList.add("splitview-active");
binding._details.classList.add("splitview-active");
this._activeSummary = aSummary;
if (binding.onShow) {
binding.onShow(aSummary, binding._details, binding.data);
}
},
/**
* Retrieve the active item's details element or null if there is none.
* @return DOMElement
*/
get activeDetails()
{
let summary = this.activeSummary;
return summary ? bindings.get(summary)._details : null;
},
/**
* Retrieve the summary element for a given ordinal.
*
* @param number aOrdinal
* @return DOMElement
* Summary element with given ordinal or null if not found.
* @see appendItem
*/
getSummaryElementByOrdinal: function SEC_getSummaryElementByOrdinal(aOrdinal)
{
return this._nav.querySelector("* > li[data-ordinal='" + aOrdinal + "']");
},
/**
* Append an item to the split view.
*
* @param DOMElement aSummary
* The summary element for the item.
* @param DOMElement aDetails
* The details element for the item.
* @param object aOptions
* Optional object that defines custom behavior and data for the item.
* All properties are optional :
* - function(DOMElement summary, DOMElement details, object data) onCreate
* Called when the item has been added.
* - function(summary, details, data) onShow
* Called when the item is shown/active.
* - function(summary, details, data) onHide
* Called when the item is hidden/inactive.
* - function(summary, details, data) onDestroy
* Called when the item has been removed.
* - object data
* Object to pass to the callbacks above.
* - number ordinal
* Items with a lower ordinal are displayed before those with a
* higher ordinal.
*/
appendItem: function ASV_appendItem(aSummary, aDetails, aOptions)
{
let binding = aOptions || {};
binding._summary = aSummary;
binding._details = aDetails;
bindings.set(aSummary, binding);
this._nav.appendChild(aSummary);
aSummary.addEventListener("click", (aEvent) => {
aEvent.stopPropagation();
this.activeSummary = aSummary;
});
this._side.appendChild(aDetails);
if (binding.onCreate) {
binding.onCreate(aSummary, aDetails, binding.data);
}
},
/**
* Append an item to the split view according to two template elements
* (one for the item's summary and the other for the item's details).
*
* @param string aName
* Name of the template elements to instantiate.
* Requires two (hidden) DOM elements with id "splitview-tpl-summary-"
* and "splitview-tpl-details-" suffixed with aName.
* @param object aOptions
* Optional object that defines custom behavior and data for the item.
* See appendItem for full description.
* @return object{summary:,details:}
* Object with the new DOM elements created for summary and details.
* @see appendItem
*/
appendTemplatedItem: function ASV_appendTemplatedItem(aName, aOptions)
{
aOptions = aOptions || {};
let summary = this._root.querySelector("#splitview-tpl-summary-" + aName);
let details = this._root.querySelector("#splitview-tpl-details-" + aName);
summary = summary.cloneNode(true);
summary.id = "";
if (aOptions.ordinal !== undefined) { // can be zero
summary.style.MozBoxOrdinalGroup = aOptions.ordinal;
summary.setAttribute("data-ordinal", aOptions.ordinal);
}
details = details.cloneNode(true);
details.id = "";
this.appendItem(summary, details, aOptions);
return {summary: summary, details: details};
},
/**
* Remove an item from the split view.
*
* @param DOMElement aSummary
* Summary element of the item to remove.
*/
removeItem: function ASV_removeItem(aSummary)
{
if (aSummary == this._activeSummary) {
this.activeSummary = null;
}
let binding = bindings.get(aSummary);
aSummary.remove();
binding._details.remove();
if (binding.onDestroy) {
binding.onDestroy(aSummary, binding._details, binding.data);
}
},
/**
* Remove all items from the split view.
*/
removeAll: function ASV_removeAll()
{
while (this._nav.hasChildNodes()) {
this.removeItem(this._nav.firstChild);
}
},
/**
* Set the item's CSS class name.
* This sets the class on both the summary and details elements, retaining
* any SplitView-specific classes.
*
* @param DOMElement aSummary
* Summary element of the item to set.
* @param string aClassName
* One or more space-separated CSS classes.
*/
setItemClassName: function ASV_setItemClassName(aSummary, aClassName)
{
let binding = bindings.get(aSummary);
let viewSpecific;
viewSpecific = aSummary.className.match(/(splitview\-[\w-]+)/g);
viewSpecific = viewSpecific ? viewSpecific.join(" ") : "";
aSummary.className = viewSpecific + " " + aClassName;
viewSpecific = binding._details.className.match(/(splitview\-[\w-]+)/g);
viewSpecific = viewSpecific ? viewSpecific.join(" ") : "";
binding._details.className = viewSpecific + " " + aClassName;
},
};