com.cgxlib.xq.client.impl.DocumentStyleImplIE.java Source code

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Here is the source code for com.cgxlib.xq.client.impl.DocumentStyleImplIE.java

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/*
 * Copyright 2011, The gwtquery team.
 *
 * 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.cgxlib.xq.client.impl;

/*
 * #%L
 * CGXlib
 * %%
 * Copyright (C) 2016 CGXlib (http://www.cgxlib.com)
 * %%
 * 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.
 * #L%
  Code is originally from gwtquery, and modified by CGXlib team.
 */

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

/**
 * A helper class to get computed CSS styles for elements on IE6.
 */
public class DocumentStyleImplIE extends DocumentStyleImpl {

    /**
     * Fix style property names.
     */
    @Override
    public String fixPropertyName(String name) {
        name = super.fixPropertyName(name);
        if ("cssFloat".equals(name)) {
            return "styleFloat";
        } else if ("class".equals(name)) {
            return "className";
        }
        return name;
    }

    @Override
    public int getHeight(Element e) {
        return (int) (e.getOffsetHeight() - num(curCSS(e, "paddingTop", true))
                - num(curCSS(e, "paddingBottom", true)) - num(curCSS(e, "borderTopWidth", true))
                - num(curCSS(e, "borderBottomWidth", true)));
    }

    @Override
    public double getOpacity(Element e) {
        Style s = e.getStyle();
        String o = s.getProperty("filter");
        if (o != null) {
            return !o.matches(".*opacity=.*") ? 1 : Double.valueOf(o.replaceAll("[^\\d]", "")) / 100;
        }
        return super.getOpacity(e);
    }

    @Override
    public int getWidth(Element e) {
        return (int) (e.getOffsetWidth() - num(curCSS(e, "paddingLeft", true))
                - num(curCSS(e, "paddingRight", true)) - num(curCSS(e, "borderRightWidth", true))
                - num(curCSS(e, "borderRightWidth", true)));
    }

    /**
     * Remove a style property from an element.
     */
    public native void removeStyleProperty(Element e, String prop) /*-{
                                                                   if (e && e.style && 'removeAttribute' in e)
                                                                   e.style.removeAttribute(prop);
                                                                   }-*/;

    /**
     * Set the value of a style property of an element.
     * IE needs a special workaround to handle opacity
     */
    @Override
    public void setStyleProperty(Element e, String prop, String val) {
        if ("opacity".equals(prop)) {
            setOpacity(e, val);
        } else {
            super.setStyleProperty(e, prop, val);
        }
    }

    @Override
    protected native String getComputedStyle(Element elem, String hyphenName, String camelName,
            String pseudo) /*-{
                           // code lifted from jQuery
                           if (!elem.style || !'currentStyle' in elem || !'runtimeStyle' in elem) return null;
                           var style = elem.style;
                           var ret = elem.currentStyle[hyphenName] || elem.currentStyle[camelName];
                           if (!/^\d+(px)?$/i.test(ret) && /^\d/.test(ret)) {
                           // Remember the original values
                           var left = style.left, rsLeft = elem.runtimeStyle.left;
                           // Put in the new values to get a computed value out
                           elem.runtimeStyle.left = elem.currentStyle.left;
                           style.left = ret || 0;
                           ret = style.pixelLeft + "px";
                           // Revert the changed values
                           style.left = left;
                           elem.runtimeStyle.left = rsLeft;
                           }
                           return ret ? "" + ret : null;
                           }-*/;

    private void setOpacity(Element e, String val) {
        if (val == null || val.trim().length() == 0) {
            val = "1";
        }
        e.getStyle().setProperty("zoom", "1");
        e.getStyle().setProperty("filter", "alpha(opacity=" + (int) (Double.valueOf(val) * 100) + ")");
    }
}