| /******************************************************************************* |
| * Copyright (c) 2008, 2009 IBM Corporation 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: |
| * 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<String, String>(); |
| IconPathMap = new TreeMap<String, String>(); // 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); |
| } |
| } |
| } |
| } |
| } |
| } |