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OpenCms is an enterprise-ready, easy to use website content management system based on Java and XML technology. Offering a complete set of features, OpenCms helps content managers worldwide to create and maintain beautiful websites fast and efficiently.

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/*
 * This library is part of OpenCms -
 * the Open Source Content Management System
 *
 * Copyright (c) Alkacon Software GmbH (http://www.alkacon.com)
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
 * Lesser General Public License for more details.
 *
 * For further information about Alkacon Software, please see the
 * company website: http://www.alkacon.com
 *
 * For further information about OpenCms, please see the
 * project website: http://www.opencms.org
 * 
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */

package org.opencms.gwt.client.util.impl;

import org.opencms.gwt.client.util.CmsDomUtil;

import com.google.gwt.dom.client.Element;

/**
 * Helper class to retrieve the computed style of an element.

* * This implementation is used for all none MSIE browsers.

* * @since 8.0.0 */ public class DocumentStyleImpl { /** * Transforms a CSS property name to its javascript property name (font-size >> fontSize).

* * @param s the property name * * @return the javascript property name */ protected static native String camelize(String s)/*-{ return s.replace(/\-(\w)/g, function(all, letter) { return letter.toUpperCase(); }); }-*/; /** * Removes the opacity attribute from the element's inline-style.

* * @param element the DOM element to manipulate */ public native void clearOpacity(Element element) /*-{ element.style.removeProperty("opacity"); }-*/; /** * Returns the computed style of the given element.

* * @param elem the element * @param name the name of the CSS property * * @return the currently computed style */ public String getCurrentStyle(Element elem, String name) { name = hyphenize(name); String propVal = getComputedStyle(elem, name); if (CmsDomUtil.Style.opacity.name().equals(name) && ((propVal == null) || (propVal.trim().length() == 0))) { propVal = "1"; } return propVal; } /** * Transforms the CSS style name to the name of the javascript style property.

* * @param name the name of the CSS property * * @return the javascript property name */ public String getPropertyName(String name) { if ("float".equals(name)) { return "cssFloat"; } else if ("class".equals(name)) { return "className"; } else if ("for".equals(name)) { return "htmlFor"; } return camelize(name); } /** * Hyphenizes the given string.

* * @param name the string to hyphenize * * @return the result */ protected native String hyphenize(String name) /*-{ return name.replace(/([A-Z])/g, "-$1").toLowerCase(); }-*/; /** * Returns the computed style from the DOM object.

* * @param elem the element object * @param name name of the CSS property * * @return the property value */ protected native String getComputedStyle(Element elem, String name) /*-{ var cStyle = $doc.defaultView.getComputedStyle(elem, null); if (cStyle == null) { return null; } var value = cStyle.getPropertyValue(name); if (value == "auto" && (name == "width" || name == "height")) { var which = name === "width" ? [ "Left", "Right" ] : [ "Top", "Bottom" ]; function getWH() { var val; val = name === "width" ? elem.offsetWidth : elem.offsetHeight; for ( var i = 0; i < which.length; i++) { val -= parseFloat(getComputedStyle(elem, "padding" + which[i])) || 0; val -= parseFloat(getComputedStyle(elem, "border" + which[i] + "Width")) || 0; } return Math.max(0, Math.round(val)); } value = getWH() + "px"; } return value; }-*/; }





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