/*******************************************************************************
* Copyright (c) 2008, 20156Angelo Zerr and others.
* All rights reserved. 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:
* Angelo Zerr <angelo.zerr@gmail.com> - initial API and implementation
* Stefan Weiser <stefanfranz.weiser@gmail.com> - Bug 459983
*******************************************************************************/
package org.eclipse.e4.ui.css.core.resources;
import org.eclipse.e4.ui.css.core.css2.CSS2ColorHelper;
import org.eclipse.e4.ui.css.core.dom.properties.css2.CSS2FontProperties;
import org.w3c.dom.css.CSSPrimitiveValue;
import org.w3c.dom.css.CSSValue;
import org.w3c.dom.css.RGBColor;
/**
* CSS Resources Helper to manage {@link IResourcesRegistry}.
*
*/
public class CSSResourcesHelpers {
public static String getCSSValueKey(CSSValue value) {
if (value instanceof CSS2FontProperties) {
return getCSSFontPropertiesKey((CSS2FontProperties) value);
}
if (value.getCssValueType() == CSSValue.CSS_PRIMITIVE_VALUE) {
return getCSSPrimitiveValueKey((CSSPrimitiveValue) value);
}
return null;
}
/**
* Return the key of the CSSPrimitiveValue <code>value</code> which is
* used to cache Resource into {@link IResourcesRegistry}.
*
* @param value
* @return
*/
public static String getCSSPrimitiveValueKey(CSSPrimitiveValue value) {
switch (value.getPrimitiveType()) {
case CSSPrimitiveValue.CSS_IDENT:
case CSSPrimitiveValue.CSS_URI:
String s = value.getStringValue();
// Test if s is Color Name
if (CSS2ColorHelper.isColorName(s)) {
RGBColor rgbColor = CSS2ColorHelper.getRGBColor(s);
if (rgbColor != null) {
return getCSSRGBColorKey(rgbColor);
}
}
return value.getStringValue();
case CSSPrimitiveValue.CSS_RGBCOLOR:
RGBColor rgbColor = value.getRGBColorValue();
return getCSSRGBColorKey(rgbColor);
case CSSPrimitiveValue.CSS_STRING:
return value.getCssText();
}
return null;
}
public static String getCSSRGBColorKey(RGBColor rgbColor) {
if (rgbColor == null) {
return null;
}
String rgb = ((int) rgbColor.getGreen().getFloatValue(CSSPrimitiveValue.CSS_NUMBER)) + "_";
rgb += ((int) rgbColor.getRed().getFloatValue(CSSPrimitiveValue.CSS_NUMBER)) + "_";
rgb += ((int) rgbColor.getBlue().getFloatValue(CSSPrimitiveValue.CSS_NUMBER)) + "";
return rgb;
}
public static String getCSSFontPropertiesKey(CSS2FontProperties fontProperties) {
return getCssText(fontProperties.getFamily()) + "_" + getCssText(fontProperties.getSize()) + "_"
+ getCssText(fontProperties.getStyle()) + "_" + getCssText(fontProperties.getWeight());
}
private static String getCssText(CSSPrimitiveValue cssPrimitiveValue) {
if (cssPrimitiveValue != null) {
return cssPrimitiveValue.getCssText();
}
return String.valueOf(cssPrimitiveValue);
}
/**
* Return the resource type of <code>type</code> cached into
* <code>resourcesRegistry</code> with CSSPrimitiveValue
* <code>value</code> key.
*
* @param resourcesRegistry
* @param type
* @param value
* @return
*/
public static Object getResource(IResourcesRegistry resourcesRegistry, Object type, CSSPrimitiveValue value) {
String key = getCSSPrimitiveValueKey(value);
return getResource(resourcesRegistry, type, key);
}
/**
* Return the resource type of <code>type</code> cached into
* <code>resourcesRegistry</code> with key <code>key</code>.
*
* @param resourcesRegistry
* @param type
* @param key
* @return
*/
public static Object getResource(IResourcesRegistry resourcesRegistry, Object type, String key) {
if (key == null) {
return null;
}
if (resourcesRegistry != null) {
return resourcesRegistry.getResource(type, key);
}
return null;
}
/**
* Register the <code>resource</code> type of <code>type</code> into
* <code>resourcesRegistry</code> with CSSPrimitiveValue
* <code>value</code> key.
*
* @param resourcesRegistry
* @param type
* @param value
* @param resource
*/
public static void registerResource(IResourcesRegistry resourcesRegistry, Object type, CSSPrimitiveValue value,
Object resource) {
if (resourcesRegistry != null) {
String key = getCSSPrimitiveValueKey(value);
if (key != null) {
resourcesRegistry.registerResource(type, key, resource);
}
}
}
/**
* Register the <code>resource</code> type of <code>type</code> into
* <code>resourcesRegistry</code> with <code>key</code>.
*
* @param resourcesRegistry
* @param type
* @param key
* @param resource
*/
public static void registerResource(IResourcesRegistry resourcesRegistry, Object type, String key,
Object resource) {
if (key == null) {
return;
}
if (resourcesRegistry != null) {
resourcesRegistry.registerResource(type, key, resource);
}
}
}