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/*******************************************************************************
* Copyright: 2004, 2012 1&1 Internet AG, Germany, http://www.1und1.de,
* and EclipseSource
*
* This program and the accompanying materials are made available under the
* terms of the Eclipse Public License v1.0 which accompanies this
* distribution, and is available at http://www.eclipse.org/legal/epl-v10.html
*
* Contributors:
* 1&1 Internet AG and others - original API and implementation
* EclipseSource - adaptation for the Eclipse Rich Ajax Platform
******************************************************************************/
/**
* Contains methods to control and query the element's overflow properties.
*/
rwt.qx.Class.define("rwt.html.Overflow",
{
/*
*****************************************************************************
STATICS
*****************************************************************************
*/
statics :
{
// Mozilla notes (http://developer.mozilla.org/en/docs/Mozilla_CSS_Extensions):
// -moz-scrollbars-horizontal: Indicates that horizontal scrollbars should
// always appear and vertical scrollbars should never appear.
// -moz-scrollbars-vertical: Indicates that vertical scrollbars should
// always appear and horizontal scrollbars should never appear.
// -moz-scrollbars-none: Indicates that no scrollbars should appear but
// the element should be scrollable from script. (This is the same as
// hidden, and has been since Mozilla 1.6alpha.)
//
// Also a lot of interesting bugs:
// * https://bugzilla.mozilla.org/show_bug.cgi?id=42676
// * https://bugzilla.mozilla.org/show_bug.cgi?id=47710
// * https://bugzilla.mozilla.org/show_bug.cgi?id=235524
/**
* Returns the computed value of the horizontal overflow
*
* @type static
* @signature function(element, mode)
* @param element {Element} DOM element to query
* @param mode {Number} Choose one of the modes {@link rwt.html.Style#COMPUTED_MODE},
* {@link rwt.html.Style#CASCADED_MODE}, {@link rwt.html.Style#LOCAL_MODE}.
* The computed mode is the default one.
* @return {String} computed overflow value
*/
getX : rwt.util.Variant.select("qx.client",
{
// gecko support differs
"gecko" : rwt.client.Client.getVersion() < 1.8 ?
// older geckos do not support overflowX
// it's also more safe to translate hidden to -moz-scrollbars-none
// because of issues in older geckos
function(element, mode)
{
var overflow = rwt.html.Style.get(element, "overflow", mode, false);
if (overflow === "-moz-scrollbars-none") {
overflow = "hidden";
}
return overflow;
} :
// gecko >= 1.8 supports overflowX, too
function(element, mode) {
return rwt.html.Style.get(element, "overflowX", mode, false);
},
// opera support differs
"opera" : rwt.client.Client.getVersion() < 9.5 ?
// older versions of opera have no support for splitted overflow properties.
function(element, mode) {
return rwt.html.Style.get(element, "overflow", mode, false);
} :
// opera >=9.5 supports overflowX, too
function(element, mode) {
return rwt.html.Style.get(element, "overflowX", mode, false);
},
// use native overflowX property
"default" : function(element, mode) {
return rwt.html.Style.get(element, "overflowX", mode, false);
}
}),
/**
* Returns the computed value of the vertical overflow
*
* @type static
* @signature function(element, mode)
* @param element {Element} DOM element to query
* @param mode {Number} Choose one of the modes {@link rwt.html.Style#COMPUTED_MODE},
* {@link rwt.html.Style#CASCADED_MODE}, {@link rwt.html.Style#LOCAL_MODE}.
* The computed mode is the default one.
* @return {String} computed overflow value
*/
getY : rwt.util.Variant.select("qx.client",
{
// gecko support differs
"gecko" : rwt.client.Client.getVersion() < 1.8 ?
// older geckos do not support overflowY
// it's also more safe to translate hidden to -moz-scrollbars-none
// because of issues in older geckos
function(element, mode)
{
var overflow = rwt.html.Style.get(element, "overflow", mode, false);
if (overflow === "-moz-scrollbars-none") {
overflow = "hidden";
}
return overflow;
} :
// gecko >= 1.8 supports overflowY, too
function(element, mode) {
return rwt.html.Style.get(element, "overflowY", mode, false);
},
// opera support differs
"opera" : rwt.client.Client.getVersion() < 9.5 ?
// older versions of opera have no support for splitted overflow properties.
function(element, mode) {
return rwt.html.Style.get(element, "overflow", mode, false);
} :
// opera >=9.5 supports overflowY, too
function(element, mode) {
return rwt.html.Style.get(element, "overflowY", mode, false);
},
// use native overflowY property
"default" : function(element, mode) {
return rwt.html.Style.get(element, "overflowY", mode, false);
}
})
}
});
