com.google.gwt.dom.client.DOMImplIE8 Maven / Gradle / Ivy
/*
* Copyright 2009 Google Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License"); you may not
* use this file except in compliance with the License. You may obtain a copy of
* the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
* License for the specific language governing permissions and limitations under
* the License.
*/
package com.google.gwt.dom.client;
class DOMImplIE8 extends DOMImplTrident {
private static boolean isIE8;
private static boolean isIE8Detected;
/**
* Check if the browser is IE8 or IE9.
*
* @return true if the browser is IE8, false if IE9
* or any other browser
*/
static boolean isIE8() {
if (!isIE8Detected) {
isIE8 = isIE8Impl();
isIE8Detected = true;
}
return isIE8;
}
// Stolen and modified from UserAgentPropertyGenerator
private static native boolean isIE8Impl() /*-{
var ua = navigator.userAgent.toLowerCase();
if (ua.indexOf("msie") != -1 && $doc.documentMode == 8) {
return true;
}
return false;
}-*/;
@Override
public void cssSetOpacity(Style style, double value) {
if (isIE8()) {
cssSetOpacityImpl(style, value);
} else {
super.cssSetOpacity(style, value);
}
}
@Override
public int getAbsoluteLeft(Element elem) {
Document doc = elem.getOwnerDocument();
return getBoundingClientRectLeft(elem) + doc.getScrollLeft();
}
@Override
public int getAbsoluteTop(Element elem) {
Document doc = elem.getOwnerDocument();
return getBoundingClientRectTop(elem) + doc.getScrollTop();
}
@Override
public int getScrollLeft(Element elem) {
if (isRTL(elem)) {
// IE8 returns increasingly *positive* values as you scroll left in RTL.
return -super.getScrollLeft(elem);
}
return super.getScrollLeft(elem);
}
@Override
public void setScrollLeft(Element elem, int left) {
if (isRTL(elem)) {
// IE8 returns increasingly *positive* values as you scroll left in RTL.
left = -left;
}
super.setScrollLeft(elem, left);
}
private native void cssSetOpacityImpl(Style style, double value) /*-{
style.filter = 'alpha(opacity=' + (value * 100) + ')';
}-*/;
}