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<?xml version="1.0"?>
<!-- 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/. -->
<bindings id="richlistboxBindings"
xmlns="http://www.mozilla.org/xbl"
xmlns:xul="http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul"
xmlns:xbl="http://www.mozilla.org/xbl">
<binding id="richlistbox"
extends="chrome://global/content/bindings/listbox.xml#listbox-base">
<resources>
<stylesheet src="chrome://global/skin/richlistbox.css"/>
</resources>
<content>
<children includes="listheader"/>
<xul:scrollbox allowevents="true" orient="vertical" anonid="main-box"
flex="1" style="overflow: auto;" xbl:inherits="dir,pack">
<children/>
</xul:scrollbox>
</content>
<implementation>
<field name="_scrollbox">
document.getAnonymousElementByAttribute(this, "anonid", "main-box");
</field>
<field name="scrollBoxObject">
this._scrollbox.boxObject;
</field>
<constructor>
<![CDATA[
// add a template build listener
if (this.builder)
this.builder.addListener(this._builderListener);
else
this._refreshSelection();
]]>
</constructor>
<destructor>
<![CDATA[
// remove the template build listener
if (this.builder)
this.builder.removeListener(this._builderListener);
]]>
</destructor>
<!-- Overriding baselistbox -->
<method name="_fireOnSelect">
<body>
<![CDATA[
// make sure not to modify last-selected when suppressing select events
// (otherwise we'll lose the selection when a template gets rebuilt)
if (this._suppressOnSelect || this.suppressOnSelect)
return;
// remember the current item and all selected items with IDs
var state = this.currentItem ? this.currentItem.id : "";
if (this.selType == "multiple" && this.selectedCount) {
let getId = function getId(aItem) { return aItem.id; }
state += " " + [... this.selectedItems].filter(getId).map(getId).join(" ");
}
if (state)
this.setAttribute("last-selected", state);
else
this.removeAttribute("last-selected");
// preserve the index just in case no IDs are available
if (this.currentIndex > -1)
this._currentIndex = this.currentIndex + 1;
var event = document.createEvent("Events");
event.initEvent("select", true, true);
this.dispatchEvent(event);
// always call this (allows a commandupdater without controller)
document.commandDispatcher.updateCommands("richlistbox-select");
]]>
</body>
</method>
<!-- We override base-listbox here because those methods don't take dir
into account on listbox (which doesn't support dir yet) -->
<method name="getNextItem">
<parameter name="aStartItem"/>
<parameter name="aDelta"/>
<body>
<![CDATA[
var prop = this.dir == "reverse" && this._mayReverse ?
"previousSibling" :
"nextSibling";
while (aStartItem) {
aStartItem = aStartItem[prop];
if (aStartItem && aStartItem instanceof
Components.interfaces.nsIDOMXULSelectControlItemElement &&
(!this._userSelecting || this._canUserSelect(aStartItem))) {
--aDelta;
if (aDelta == 0)
return aStartItem;
}
}
return null;
]]></body>
</method>
<method name="getPreviousItem">
<parameter name="aStartItem"/>
<parameter name="aDelta"/>
<body>
<![CDATA[
var prop = this.dir == "reverse" && this._mayReverse ?
"nextSibling" :
"previousSibling";
while (aStartItem) {
aStartItem = aStartItem[prop];
if (aStartItem && aStartItem instanceof
Components.interfaces.nsIDOMXULSelectControlItemElement &&
(!this._userSelecting || this._canUserSelect(aStartItem))) {
--aDelta;
if (aDelta == 0)
return aStartItem;
}
}
return null;
]]>
</body>
</method>
<method name="appendItem">
<parameter name="aLabel"/>
<parameter name="aValue"/>
<body>
return this.insertItemAt(-1, aLabel, aValue);
</body>
</method>
<method name="insertItemAt">
<parameter name="aIndex"/>
<parameter name="aLabel"/>
<parameter name="aValue"/>
<body>
const XULNS =
"http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul";
var item =
this.ownerDocument.createElementNS(XULNS, "richlistitem");
item.setAttribute("value", aValue);
var label = this.ownerDocument.createElementNS(XULNS, "label");
label.setAttribute("value", aLabel);
label.setAttribute("flex", "1");
label.setAttribute("crop", "end");
item.appendChild(label);
var before = this.getItemAtIndex(aIndex);
if (!before)
this.appendChild(item);
else
this.insertBefore(item, before);
return item;
</body>
</method>
<property name="itemCount" readonly="true"
onget="return this.children.length"/>
<method name="getIndexOfItem">
<parameter name="aItem"/>
<body>
<![CDATA[
// don't search the children, if we're looking for none of them
if (aItem == null)
return -1;
return this.children.indexOf(aItem);
]]>
</body>
</method>
<method name="getItemAtIndex">
<parameter name="aIndex"/>
<body>
return this.children[aIndex] || null;
</body>
</method>
<method name="ensureIndexIsVisible">
<parameter name="aIndex"/>
<body>
<![CDATA[
// work around missing implementation in scrollBoxObject
return this.ensureElementIsVisible(this.getItemAtIndex(aIndex));
]]>
</body>
</method>
<method name="ensureElementIsVisible">
<parameter name="aElement"/>
<body>
<![CDATA[
if (!aElement)
return;
var targetRect = aElement.getBoundingClientRect();
var scrollRect = this._scrollbox.getBoundingClientRect();
var offset = targetRect.top - scrollRect.top;
if (offset >= 0) {
// scrollRect.bottom wouldn't take a horizontal scroll bar into account
let scrollRectBottom = scrollRect.top + this._scrollbox.clientHeight;
offset = targetRect.bottom - scrollRectBottom;
if (offset <= 0)
return;
}
this._scrollbox.scrollTop += offset;
]]>
</body>
</method>
<method name="scrollToIndex">
<parameter name="aIndex"/>
<body>
<![CDATA[
var item = this.getItemAtIndex(aIndex);
if (item)
this.scrollBoxObject.scrollToElement(item);
]]>
</body>
</method>
<method name="getNumberOfVisibleRows">
<!-- returns the number of currently visible rows -->
<!-- don't rely on this function, if the items' height can vary! -->
<body>
<![CDATA[
var children = this.children;
for (var top = 0; top < children.length && !this._isItemVisible(children[top]); top++);
for (var ix = top; ix < children.length && this._isItemVisible(children[ix]); ix++);
return ix - top;
]]>
</body>
</method>
<method name="getIndexOfFirstVisibleRow">
<body>
<![CDATA[
var children = this.children;
for (var ix = 0; ix < children.length; ix++)
if (this._isItemVisible(children[ix]))
return ix;
return -1;
]]>
</body>
</method>
<method name="getRowCount">
<body>
<![CDATA[
return this.children.length;
]]>
</body>
</method>
<method name="scrollOnePage">
<parameter name="aDirection"/> <!-- Must be -1 or 1 -->
<body>
<![CDATA[
var children = this.children;
if (children.length == 0)
return 0;
// If nothing is selected, we just select the first element
// at the extreme we're moving away from
if (!this.currentItem)
return aDirection == -1 ? children.length : 0;
// If the current item is visible, scroll by one page so that
// the new current item is at approximately the same position as
// the existing current item.
if (this._isItemVisible(this.currentItem))
this.scrollBoxObject.scrollBy(0, this.scrollBoxObject.height * aDirection);
// Figure out, how many items fully fit into the view port
// (including the currently selected one), and determine
// the index of the first one lying (partially) outside
var height = this.scrollBoxObject.height;
var startBorder = this.currentItem.boxObject.y;
if (aDirection == -1)
startBorder += this.currentItem.boxObject.height;
var index = this.currentIndex;
for (var ix = index; 0 <= ix && ix < children.length; ix += aDirection) {
var boxObject = children[ix].boxObject;
if (boxObject.height == 0)
continue; // hidden children have a y of 0
var endBorder = boxObject.y + (aDirection == -1 ? boxObject.height : 0);
if ((endBorder - startBorder) * aDirection > height)
break; // we've reached the desired distance
index = ix;
}
return index != this.currentIndex ? index - this.currentIndex : aDirection;
]]>
</body>
</method>
<!-- richlistbox specific -->
<property name="children" readonly="true">
<getter>
<![CDATA[
var childNodes = [];
var isReverse = this.dir == "reverse" && this._mayReverse;
var child = isReverse ? this.lastChild : this.firstChild;
var prop = isReverse ? "previousSibling" : "nextSibling";
while (child) {
if (child instanceof Components.interfaces.nsIDOMXULSelectControlItemElement)
childNodes.push(child);
child = child[prop];
}
return childNodes;
]]>
</getter>
</property>
<field name="_builderListener" readonly="true">
<![CDATA[
({
mOuter: this,
item: null,
willRebuild: function(builder) { },
didRebuild: function(builder) {
this.mOuter._refreshSelection();
}
});
]]>
</field>
<method name="_refreshSelection">
<body>
<![CDATA[
// when this method is called, we know that either the currentItem
// and selectedItems we have are null (ctor) or a reference to an
// element no longer in the DOM (template).
// first look for the last-selected attribute
var state = this.getAttribute("last-selected");
if (state) {
var ids = state.split(" ");
var suppressSelect = this._suppressOnSelect;
this._suppressOnSelect = true;
this.clearSelection();
for (let i = 1; i < ids.length; i++) {
var selectedItem = document.getElementById(ids[i]);
if (selectedItem)
this.addItemToSelection(selectedItem);
}
var currentItem = document.getElementById(ids[0]);
if (!currentItem && this._currentIndex)
currentItem = this.getItemAtIndex(Math.min(
this._currentIndex - 1, this.getRowCount()));
if (currentItem) {
this.currentItem = currentItem;
if (this.selType != "multiple" && this.selectedCount == 0)
this.selectedItem = currentItem;
if (this.scrollBoxObject.height) {
this.ensureElementIsVisible(currentItem);
}
else {
// XXX hack around a bug in ensureElementIsVisible as it will
// scroll beyond the last element, bug 493645.
var previousElement = this.dir == "reverse" ? currentItem.nextSibling :
currentItem.previousSibling;
this.ensureElementIsVisible(previousElement);
}
}
this._suppressOnSelect = suppressSelect;
// XXX actually it's just a refresh, but at least
// the Extensions manager expects this:
this._fireOnSelect();
return;
}
// try to restore the selected items according to their IDs
// (applies after a template rebuild, if last-selected was not set)
if (this.selectedItems) {
let itemIds = [];
for (let i = this.selectedCount - 1; i >= 0; i--) {
let selectedItem = this.selectedItems[i];
itemIds.push(selectedItem.id);
this.selectedItems.remove(selectedItem);
}
for (let i = 0; i < itemIds.length; i++) {
let selectedItem = document.getElementById(itemIds[i]);
if (selectedItem) {
this.selectedItems.append(selectedItem);
}
}
}
if (this.currentItem && this.currentItem.id)
this.currentItem = document.getElementById(this.currentItem.id);
else
this.currentItem = null;
// if we have no previously current item or if the above check fails to
// find the previous nodes (which causes it to clear selection)
if (!this.currentItem && this.selectedCount == 0) {
this.currentIndex = this._currentIndex ? this._currentIndex - 1 : 0;
// cf. listbox constructor:
// select items according to their attributes
var children = this.children;
for (let i = 0; i < children.length; ++i) {
if (children[i].getAttribute("selected") == "true")
this.selectedItems.append(children[i]);
}
}
if (this.selType != "multiple" && this.selectedCount == 0)
this.selectedItem = this.currentItem;
]]>
</body>
</method>
<method name="_isItemVisible">
<parameter name="aItem"/>
<body>
<![CDATA[
if (!aItem)
return false;
var y = this.scrollBoxObject.positionY + this.scrollBoxObject.y;
// Partially visible items are also considered visible
return (aItem.boxObject.y + aItem.boxObject.height > y) &&
(aItem.boxObject.y < y + this.scrollBoxObject.height);
]]>
</body>
</method>
<field name="_currentIndex">null</field>
<!-- For backwards-compatibility and for convenience.
Use getIndexOfItem instead. -->
<method name="getIndexOf">
<parameter name="aElement"/>
<body>
<![CDATA[
return this.getIndexOfItem(aElement);
]]>
</body>
</method>
<!-- For backwards-compatibility and for convenience.
Use ensureElementIsVisible instead -->
<method name="ensureSelectedElementIsVisible">
<body>
<![CDATA[
return this.ensureElementIsVisible(this.selectedItem);
]]>
</body>
</method>
<!-- For backwards-compatibility and for convenience.
Use moveByOffset instead. -->
<method name="goUp">
<body>
<![CDATA[
var index = this.currentIndex;
this.moveByOffset(-1, true, false);
return index != this.currentIndex;
]]>
</body>
</method>
<method name="goDown">
<body>
<![CDATA[
var index = this.currentIndex;
this.moveByOffset(1, true, false);
return index != this.currentIndex;
]]>
</body>
</method>
<!-- deprecated (is implied by currentItem and selectItem) -->
<method name="fireActiveItemEvent"><body/></method>
</implementation>
<handlers>
<handler event="click">
<![CDATA[
// clicking into nothing should unselect
if (event.originalTarget == this._scrollbox) {
this.clearSelection();
this.currentItem = null;
}
]]>
</handler>
<handler event="MozSwipeGesture">
<![CDATA[
// Only handle swipe gestures up and down
switch (event.direction) {
case event.DIRECTION_DOWN:
this._scrollbox.scrollTop = this._scrollbox.scrollHeight;
break;
case event.DIRECTION_UP:
this._scrollbox.scrollTop = 0;
break;
}
]]>
</handler>
</handlers>
</binding>
<binding id="richlistitem"
extends="chrome://global/content/bindings/listbox.xml#listitem">
<content>
<children/>
</content>
<resources>
<stylesheet src="chrome://global/skin/richlistbox.css"/>
</resources>
<implementation>
<destructor>
<![CDATA[
var control = this.control;
if (!control)
return;
// When we are destructed and we are current or selected, unselect ourselves
// so that richlistbox's selection doesn't point to something not in the DOM.
// We don't want to reset last-selected, so we set _suppressOnSelect.
if (this.selected) {
var suppressSelect = control._suppressOnSelect;
control._suppressOnSelect = true;
control.removeItemFromSelection(this);
control._suppressOnSelect = suppressSelect;
}
if (this.current)
control.currentItem = null;
]]>
</destructor>
<property name="label" readonly="true">
<!-- Setter purposely not implemented; the getter returns a
concatentation of label text to expose via accessibility APIs -->
<getter>
<![CDATA[
const XULNS =
"http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul";
return Array.map(this.getElementsByTagNameNS(XULNS, "label"),
label => label.value)
.join(" ");
]]>
</getter>
</property>
<property name="searchLabel">
<getter>
<![CDATA[
return this.hasAttribute("searchlabel") ?
this.getAttribute("searchlabel") : this.label;
]]>
</getter>
<setter>
<![CDATA[
if (val !== null)
this.setAttribute("searchlabel", val);
else
// fall back to the label property (default value)
this.removeAttribute("searchlabel");
return val;
]]>
</setter>
</property>
</implementation>
</binding>
</bindings>
|
