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/*******************************************************************************
* Copyright (c) 2008, 2016 IBM Corporation and others.
*
* This program and the accompanying materials
* are made available under the terms of the Eclipse Public License 2.0
* which accompanies this distribution, and is available at
* https://www.eclipse.org/legal/epl-2.0/
*
* SPDX-License-Identifier: EPL-2.0
*
* Contributors:
* IBM Corporation - initial API and implementation
*******************************************************************************/
package org.eclipse.help.internal.webapp.data;
import java.util.HashMap;
import java.util.Map;
import java.util.TreeMap;
import org.eclipse.core.runtime.IConfigurationElement;
import org.eclipse.core.runtime.IExtension;
import org.eclipse.core.runtime.Platform;
public class IconFinder {
private static final String LEAF = "_leaf"; //$NON-NLS-1$
private static final String CLOSED = "_closed"; //$NON-NLS-1$
private static final String OPEN = "_open"; //$NON-NLS-1$
private static final String ALT = "_alt"; //$NON-NLS-1$
private static final String EXT_PT = "org.eclipse.help.toc"; //$NON-NLS-1$
private static final String TOC_ICON_ELEMENT = "tocIcon"; //$NON-NLS-1$
private static final String TOC_ICON_ID = "id"; //$NON-NLS-1$
private static final String OPEN_ICON_PATH = "openIcon"; //$NON-NLS-1$
private static final String CLOSED_ICON_PATH = "closedIcon"; //$NON-NLS-1$
private static final String LEAF_ICON_PATH = "leafIcon"; //$NON-NLS-1$
private static final String ICON_ALT_TEXT = "altText"; //$NON-NLS-1$
private static final String PATH_SEPARATOR = "/"; //$NON-NLS-1$
private static boolean iconsInitialized = false;
public static int TYPEICON_OPEN = 0;
public static int TYPEICON_CLOSED = 1;
public static int TYPEICON_LEAF = 2;
private static Map<String, String> IconPathMap = null; // hash table
private static void addIconPath(String IconKey, String IconPath) {
if (IconPathMap == null) {
IconPathMap = new HashMap<>();
IconPathMap = new TreeMap<>(); // sorted map
}
IconPathMap.put(IconKey, IconPath);
}
private static String getIconPath(String IconKey) {
return getEntry(IconKey);
}
private static String getIconAltText(String IconKey) {
return getEntry(IconKey);
}
private static String getEntry(String IconKey) {
if (IconPathMap == null)
return null;
Object key = IconPathMap.get(IconKey);
return (String) key;
}
private static void setIconImagePath(String bundleId, String path, String key) {
String iconPath = IconFinder.getIconPath(key);
if(iconPath == null){
iconPath = bundleId + PATH_SEPARATOR + path;
IconFinder.addIconPath(key, iconPath);
}
}
private static void setIconAltText(String value, String key) {
IconFinder.addIconPath(key, value);
}
public static String getImagePathFromId(String iconId, int type) {
if (iconId == null) {
return null;
}
initializeTocIcons();
String suffix;
switch(type){
case 0:suffix = OPEN;break;
case 1:suffix = CLOSED;break;
case 2:suffix = LEAF;break;
default: suffix = OPEN; break;
}
String result = lookupImagePath(iconId + suffix);
if (result != null) {
return result;
}
return lookupImagePath(iconId + OPEN);
}
public static String getIconAltFromId(String iconId) {
if (iconId == null) {
return null;
}
initializeTocIcons();
return getIconAltText(iconId + ALT);
}
/**
* Tests to see if an icon attribute was specified and the icon type was declared
* in an extension.
*/
public static boolean isIconDefined(String icon) {
if (icon == null || icon.length() == 0) {
return false;
}
String result = getImagePathFromId(icon, TYPEICON_OPEN);
return result != null;
}
private static String lookupImagePath(String name) {
return getIconPath(name);
}
private static void initializeTocIcons() {
if (iconsInitialized) {
return;
}
iconsInitialized = true;
// Get extension points that contribute products
IExtension[] extensionsFound = Platform.getExtensionRegistry()
.getExtensionPoint(EXT_PT).getExtensions();
for (IExtension element : extensionsFound) {
IConfigurationElement[] configElements = element
.getConfigurationElements();
for (IConfigurationElement iconElem : configElements) {
if (iconElem.getName().equals(TOC_ICON_ELEMENT)) {
String attrs[] = iconElem.getAttributeNames();
String contributorID = iconElem.getContributor().getName();
for (String attr : attrs) {
if (attr.equals(OPEN_ICON_PATH))
IconFinder.setIconImagePath(contributorID, iconElem.getAttribute(OPEN_ICON_PATH),iconElem.getAttribute(TOC_ICON_ID) + OPEN);
if (attr.equals(CLOSED_ICON_PATH))
IconFinder.setIconImagePath(contributorID,iconElem.getAttribute(CLOSED_ICON_PATH),iconElem.getAttribute(TOC_ICON_ID)+ CLOSED);
if (attr.equals(LEAF_ICON_PATH))
IconFinder.setIconImagePath(contributorID, iconElem.getAttribute(LEAF_ICON_PATH),iconElem.getAttribute(TOC_ICON_ID) + LEAF);
if (attr.equals(ICON_ALT_TEXT))
IconFinder.setIconAltText(iconElem.getAttribute(ICON_ALT_TEXT),iconElem.getAttribute(TOC_ICON_ID) + ALT);
}
}
}
}
}
}
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