/*******************************************************************************
 * Copyright (c) 2000, 2018 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.jdt.internal.debug.ui;

import java.net.URL;

import org.eclipse.core.runtime.FileLocator;
import org.eclipse.core.runtime.Path;
import org.eclipse.core.runtime.Platform;
import org.eclipse.jface.resource.ImageDescriptor;
import org.eclipse.jface.resource.ImageRegistry;
import org.eclipse.swt.graphics.Image;
import org.osgi.framework.Bundle;

/**
 * Bundle of most images used by the Java debug plug-in.
 */
public class JavaDebugImages {

    private static String ICONS_PATH = "$nl$/icons/full/"; //$NON-NLS-1$

	// The plugin registry
	private static ImageRegistry fgImageRegistry = null;

	/*
	 * Available cached Images in the Java debug plug-in image registry.
	 */
	public static final String IMG_OBJS_EXCEPTION= "IMG_OBJS_EXCEPTION";			//$NON-NLS-1$
	public static final String IMG_OBJS_EXCEPTION_DISABLED= "IMG_OBJS_EXCEPTION_DISABLED";			//$NON-NLS-1$
	public static final String IMG_OBJS_ERROR= "IMG_OBJS_ERROR";			//$NON-NLS-1$

	public static final String IMG_OVR_BREAKPOINT_INSTALLED= "IMG_OBJS_BREAKPOINT_INSTALLED";	//$NON-NLS-1$
	public static final String IMG_OVR_BREAKPOINT_INSTALLED_DISABLED= "IMG_OBJS_BREAKPOINT_INSTALLED_DISABLED";	//$NON-NLS-1$

	public static final String IMG_OBJS_LOCAL_VARIABLE = "IMG_OBJS_LOCAL_VARIABLE";	//$NON-NLS-1$
	public static final String IMG_OBJS_METHOD_RESULT = "IMG_OBJS_METHOD_RESULT"; //$NON-NLS-1$
	public static final String IMG_OBJS_METHOD_RESULT_DISABLED = "IMG_OBJS_METHOD_RESULT_DISABLED"; //$NON-NLS-1$

	public static final String IMG_OVR_METHOD_BREAKPOINT_ENTRY= "IMG_OBJS_METHOD_BREAKPOINT_ENTRY";	//$NON-NLS-1$
	public static final String IMG_OVR_METHOD_BREAKPOINT_ENTRY_DISABLED= "IMG_OBJS_METHOD_BREAKPOINT_ENTRY_DISABLED";	//$NON-NLS-1$
	public static final String IMG_OVR_METHOD_BREAKPOINT_EXIT= "IMG_OBJS_METHOD_BREAKPOINT_EXIT";	//$NON-NLS-1$
	public static final String IMG_OVR_METHOD_BREAKPOINT_EXIT_DISABLED= "IMG_OBJS_METHOD_BREAKPOINT_EXIT_DISABLED";	//$NON-NLS-1$

	public static final String IMG_OVR_CONDITIONAL_BREAKPOINT= "IMG_OBJS_CONDITIONAL_BREAKPOINT";	//$NON-NLS-1$
	public static final String IMG_OVR_CONDITIONAL_BREAKPOINT_DISABLED= "IMG_OBJS_CONDITIONAL_BREAKPOINT_DISABLED";	//$NON-NLS-1$

	public static final String IMG_OVR_SCOPED_BREAKPOINT= "IMG_OBJS_SCOPED_BREAKPOINT";	//$NON-NLS-1$
	public static final String IMG_OVR_SCOPED_BREAKPOINT_DISABLED= "IMG_OBJS_SCOPED_BREAKPOINT_DISABLED";	//$NON-NLS-1$

	public static final String IMG_OVR_UNCAUGHT_BREAKPOINT= "IMG_OBJS_UNCAUGHT_BREAKPOINT";	//$NON-NLS-1$
	public static final String IMG_OVR_UNCAUGHT_BREAKPOINT_DISABLED= "IMG_OBJS_UNCAUGHT_BREAKPOINT_DISABLED";	//$NON-NLS-1$

	public static final String IMG_OVR_CAUGHT_BREAKPOINT= "IMG_OBJS_CAUGHT_BREAKPOINT";	//$NON-NLS-1$
	public static final String IMG_OVR_CAUGHT_BREAKPOINT_DISABLED= "IMG_OBJS_CAUGHT_BREAKPOINT_DISABLED";	//$NON-NLS-1$

	public static final String IMG_OBJS_SNIPPET_EVALUATING= "IMG_OBJS_SNIPPET_EVALUATING";	//$NON-NLS-1$

	public static final String IMG_VIEW_ARGUMENTS_TAB= "IMG_VIEW_ARGUMENTS_TAB";  //$NON-NLS-1$

	public static final String IMG_OBJS_MONITOR = "IMG_OBJS_MONITOR";  //$NON-NLS-1$
	public static final String IMG_OBJS_CONTENDED_MONITOR = "IMG_OBJS_CONTENDED_MONITOR";  //$NON-NLS-1$
	public static final String IMG_OBJS_OWNED_MONITOR = "IMG_OBJS_OWNED_MONITOR";  //$NON-NLS-1$

	public static final String IMG_OBJS_REFERENCE = "IMG_OBJS_REFERENCE";  //$NON-NLS-1$

	public static final String IMG_OVR_OWNED = "IMG_OVR_OWNED";			//$NON-NLS-1$
	public static final String IMG_OVR_OWNS_MONITOR = "IMG_OVR_OWNS_MONITOR";		//$NON-NLS-1$
	public static final String IMG_OVR_IN_CONTENTION = "IMG_OVR_IN_CONTENTION";			//$NON-NLS-1$
	public static final String IMG_OVR_IN_CONTENTION_FOR_MONITOR = "IMG_OVR_IN_CONTENTION_FOR_MONITOR";		//$NON-NLS-1$
	public static final String IMG_OVR_IN_DEADLOCK = "IMG_OVR_IN_DEADLOCK"; //$NON-NLS-1$

	public static final String IMG_OBJS_EXCEPTION_BRKPT_TYPE = "IMG_OBJS_EXCEPTION_BRKPT_TYPE";  //$NON-NLS-1$
	public static final String IMG_OBJS_LINE_BRKPT_TYPE = "IMG_OBJS_LINE_BRKPT_TYPE";  //$NON-NLS-1$
	public static final String IMG_OBJS_CLASSLOAD_BRKPT_TYPE = "IMG_OBJS_CLASSLOAD_BRKPT_TYPE";  //$NON-NLS-1$
	public static final String IMG_OBJS_WATCHPOINT_TYPE = "IMG_OBJS_WATCHPOINT_TYPE";  //$NON-NLS-1$
	public static final String IMG_OBJS_JSP_BRKPT_TYPE = "IMG_OBJS_JSP_BRKPT_TYPE";  //$NON-NLS-1$
	public static final String IMG_OBJS_METHOD_BRKPT_TYPE = "IMG_OBJS_METHOD_BRKPT_TYPE";  //$NON-NLS-1$
	public static final String IMG_OBJS_THREAD_GROUP = "IMG_OBJS_THREAD_GROUP";  //$NON-NLS-1$

	public static final String IMG_OBJS_CLASSPATH = "IMG_OBJS_CLASSPATH"; //$NON-NLS-1$

	public static final String IMG_OVR_OUT_OF_SYNCH = "IMG_OVR_OUT_OF_SYNCH"; //$NON-NLS-1$
	public static final String IMG_OVR_MAY_BE_OUT_OF_SYNCH = "IMG_OVR_MAY_BE_OUT_OF_SYNCH"; //$NON-NLS-1$
	public static final String IMG_OVR_SYNCHRONIZED = "IMG_OVR_SYNCHRONIZED"; //$NON-NLS-1$

	public static final String IMG_WIZBAN_NEWSCRAPPAGE = "IMG_WIZBAN_NEWSCRAPPAGE"; //$NON-NLS-1$
	public static final String IMG_WIZBAN_LIBRARY = "IMG_WIZBAN_LIBRARY"; //$NON-NLS-1$
	public static final String IMG_TOOL_TERMSNIPPET = "IMG_TOOL_TERMSNIPPET"; //$NON-NLS-1$
	public static final String IMG_TOOL_TERMSNIPPET_HOVER = "IMG_TOOL_TERMSNIPPET_HOVER"; //$NON-NLS-1$
	public static final String IMG_TOOL_TERMSNIPPET_DISABLED = "IMG_TOOL_TERMSNIPPET_DISABLED"; //$NON-NLS-1$
	public static final String IMG_OBJ_JAVA_INSPECT_EXPRESSION = "IMG_OBJ_JAVA_INSPECT_EXPRESSION"; //$NON-NLS-1$

    public static final String IMG_ELCL_AUTO_FORMAT = "IMG_ELCL_AUTO_FORMAT"; //$NON-NLS-1$

    public static final String IMG_ELCL_ALL_REFERENCES = "IMG_ELCL_ALL_REFERENCES"; //$NON-NLS-1$

	public static final String IMG_OVR_IN_TRIGGER_POINT = "IMG_OVR_IN_TRIGGER_POINT"; //$NON-NLS-1$

	public static final String IMG_OVR_TRIGGER_SUPPRESSED = "IMG_OVR_TRIGGER_SUPPRESSED"; //$NON-NLS-1$

	public static final String IMG_JAVA_STACKTRACE_CONSOLE = "IMG_JAVA_STACKTRACE_CONSOLE"; //$NON-NLS-1$

	/*
	 * Set of predefined Image Descriptors.
	 */
	private static final String T_OBJ= ICONS_PATH + "obj16/"; 		//$NON-NLS-1$
	private static final String T_OVR= ICONS_PATH + "ovr16/"; 		//$NON-NLS-1$
	private static final String T_WIZBAN= ICONS_PATH + "wizban/"; 	//$NON-NLS-1$
	private static final String T_EVIEW= ICONS_PATH + "eview16/"; 	//$NON-NLS-1$
	private static final String T_DLCL= ICONS_PATH + "dtool16/"; 	//$NON-NLS-1$
	private static final String T_ELCL= ICONS_PATH + "etool16/"; 	//$NON-NLS-1$
    private static final String E_LCL = ICONS_PATH + "elcl16/"; //$NON-NLS-1$

	/**
	 * Returns the image managed under the given key in this registry.
	 *
	 * @param key the image's key
	 * @return the image managed under the given key
	 */
	public static Image get(String key) {
		return getImageRegistry().get(key);
	}

	/**
	 * Returns the <code>ImageDescriptor</code> identified by the given key,
	 * or <code>null</code> if it does not exist.
	 */
	public static ImageDescriptor getImageDescriptor(String key) {
		return getImageRegistry().getDescriptor(key);
	}

	/*
	 * Helper method to access the image registry from the JDIDebugUIPlugin class.
	 */
	/* package */ static ImageRegistry getImageRegistry() {
		if (fgImageRegistry == null) {
			initializeImageRegistry();
		}
		return fgImageRegistry;
	}

	private static void initializeImageRegistry() {
		fgImageRegistry= new ImageRegistry(JDIDebugUIPlugin.getStandardDisplay());
		declareImages();
	}

	private static void declareImages() {
		declareRegistryImage(IMG_OBJS_EXCEPTION, T_OBJ + "jexception_obj.png"); //$NON-NLS-1$
		declareRegistryImage(IMG_OBJS_EXCEPTION_DISABLED, T_OBJ + "jexceptiond_obj.png"); //$NON-NLS-1$
		declareRegistryImage(IMG_OVR_BREAKPOINT_INSTALLED, T_OVR + "installed_ovr.png"); //$NON-NLS-1$
		declareRegistryImage(IMG_OVR_BREAKPOINT_INSTALLED_DISABLED, T_OVR + "installed_ovr_disabled.png"); //$NON-NLS-1$
		declareRegistryImage(IMG_OBJS_REFERENCE, T_OBJ + "reference_obj.gif"); //$NON-NLS-1$

		declareRegistryImage(IMG_OBJS_LOCAL_VARIABLE, T_OBJ + "localvariable_obj.png"); //$NON-NLS-1$
		declareRegistryImage(IMG_OBJS_METHOD_RESULT, T_OBJ + "methodresult_obj.png"); //$NON-NLS-1$
		declareRegistryImage(IMG_OBJS_METHOD_RESULT_DISABLED, T_OBJ + "methodresult_obj_disabled.png"); //$NON-NLS-1$

		declareRegistryImage(IMG_OVR_METHOD_BREAKPOINT_ENTRY, T_OVR + "entry_ovr.png"); //$NON-NLS-1$
		declareRegistryImage(IMG_OVR_METHOD_BREAKPOINT_ENTRY_DISABLED, T_OVR + "entry_ovr_disabled.png"); //$NON-NLS-1$
		declareRegistryImage(IMG_OVR_METHOD_BREAKPOINT_EXIT, T_OVR + "exit_ovr.png"); //$NON-NLS-1$
		declareRegistryImage(IMG_OVR_METHOD_BREAKPOINT_EXIT_DISABLED, T_OVR + "exit_ovr_disabled.png"); //$NON-NLS-1$

		declareRegistryImage(IMG_OVR_CONDITIONAL_BREAKPOINT, T_OVR + "conditional_ovr.png"); //$NON-NLS-1$
		declareRegistryImage(IMG_OVR_CONDITIONAL_BREAKPOINT_DISABLED, T_OVR + "conditional_ovr_disabled.png"); //$NON-NLS-1$

		declareRegistryImage(IMG_OVR_SCOPED_BREAKPOINT, T_OVR + "scoped_ovr.png"); //$NON-NLS-1$
		declareRegistryImage(IMG_OVR_SCOPED_BREAKPOINT_DISABLED, T_OVR + "scoped_ovr_disabled.png"); //$NON-NLS-1$

		declareRegistryImage(IMG_OVR_UNCAUGHT_BREAKPOINT, T_OVR + "uncaught_ovr.png"); //$NON-NLS-1$
		declareRegistryImage(IMG_OVR_UNCAUGHT_BREAKPOINT_DISABLED, T_OVR + "uncaught_ovr_disabled.png"); //$NON-NLS-1$

		declareRegistryImage(IMG_OVR_CAUGHT_BREAKPOINT, T_OVR + "caught_ovr.png"); //$NON-NLS-1$
		declareRegistryImage(IMG_OVR_CAUGHT_BREAKPOINT_DISABLED, T_OVR + "caught_ovr_disabled.png"); //$NON-NLS-1$

		declareRegistryImage(IMG_OBJS_ERROR, T_OBJ + "jrtexception_obj.png"); //$NON-NLS-1$

		declareRegistryImage(IMG_OBJS_SNIPPET_EVALUATING, T_OBJ + "jsbook_run_obj.png"); //$NON-NLS-1$

		declareRegistryImage(IMG_VIEW_ARGUMENTS_TAB, T_EVIEW + "variable_tab.png"); //$NON-NLS-1$

		declareRegistryImage(IMG_OVR_OUT_OF_SYNCH, T_OVR + "error_co.png"); //$NON-NLS-1$
		declareRegistryImage(IMG_OVR_MAY_BE_OUT_OF_SYNCH, T_OVR + "warning_co.png"); //$NON-NLS-1$
		declareRegistryImage(IMG_OVR_SYNCHRONIZED, T_OVR + "sync_ovr.png"); //$NON-NLS-1$

		declareRegistryImage(IMG_OBJS_MONITOR, T_OBJ + "monitor_obj.png"); //$NON-NLS-1$
		declareRegistryImage(IMG_OVR_OWNED, T_OVR + "owned_ovr.png"); //$NON-NLS-1$
		declareRegistryImage(IMG_OVR_OWNS_MONITOR, T_OVR + "ownsmonitor_ovr.png"); //$NON-NLS-1$
		declareRegistryImage(IMG_OVR_IN_CONTENTION, T_OVR + "contention_ovr.png"); //$NON-NLS-1$
		declareRegistryImage(IMG_OVR_IN_CONTENTION_FOR_MONITOR, T_OVR + "contentionformonitor_ovr.png"); //$NON-NLS-1$
		declareRegistryImage(IMG_OVR_IN_DEADLOCK, T_OVR + "deadlock_ovr.png"); //$NON-NLS-1$
		declareRegistryImage(IMG_OBJS_CONTENDED_MONITOR, T_OBJ + "contended_monitor_obj.png"); //$NON-NLS-1$
		declareRegistryImage(IMG_OBJS_OWNED_MONITOR, T_OBJ + "owned_monitor_obj.png"); //$NON-NLS-1$
		declareRegistryImage(IMG_OBJS_THREAD_GROUP, T_OBJ + "threadgroup_obj.png"); //$NON-NLS-1$

		declareRegistryImage(IMG_WIZBAN_NEWSCRAPPAGE, T_WIZBAN + "newsbook_wiz.png");		//$NON-NLS-1$
		declareRegistryImage(IMG_WIZBAN_LIBRARY, T_WIZBAN + "library_wiz.png"); 	//$NON-NLS-1$

		declareRegistryImage(IMG_TOOL_TERMSNIPPET, T_ELCL + "term_sbook.png"); //$NON-NLS-1$
		declareRegistryImage(IMG_TOOL_TERMSNIPPET_HOVER, T_ELCL + "term_sbook.png"); //$NON-NLS-1$
		declareRegistryImage(IMG_TOOL_TERMSNIPPET_DISABLED, T_DLCL + "term_sbook.png"); //$NON-NLS-1$

		declareRegistryImage(IMG_OBJ_JAVA_INSPECT_EXPRESSION, T_OBJ + "insp_sbook.png"); //$NON-NLS-1$
		declareRegistryImage(IMG_OBJS_CLASSPATH, T_OBJ + "classpath_obj.png"); //$NON-NLS-1$

		declareRegistryImage(IMG_OBJS_EXCEPTION_BRKPT_TYPE, T_OBJ + "jexception_obj.png"); //$NON-NLS-1$
		declareRegistryImage(IMG_OBJS_LINE_BRKPT_TYPE, T_OBJ + "jline_obj.png"); //$NON-NLS-1$
		declareRegistryImage(IMG_OBJS_CLASSLOAD_BRKPT_TYPE, T_OBJ + "jload_obj.png"); //$NON-NLS-1$
		declareRegistryImage(IMG_OBJS_METHOD_BRKPT_TYPE, T_OBJ + "jmeth_obj.png"); //$NON-NLS-1$
		declareRegistryImage(IMG_OBJS_JSP_BRKPT_TYPE, T_OBJ + "jspbrkpt_obj.png"); //$NON-NLS-1$
		declareRegistryImage(IMG_OBJS_WATCHPOINT_TYPE, T_OBJ + "jwatch_obj.png"); //$NON-NLS-1$

		declareRegistryImage(IMG_ELCL_AUTO_FORMAT, E_LCL + "autoform_menu.png"); //$NON-NLS-1$

		declareRegistryImage(IMG_ELCL_ALL_REFERENCES, E_LCL + "all_references.png"); //$NON-NLS-1$

		declareRegistryImage(IMG_OVR_IN_TRIGGER_POINT, T_OVR + "trigger_ovr.png"); //$NON-NLS-1$

		declareRegistryImage(IMG_OVR_TRIGGER_SUPPRESSED, T_OVR + "trigger_suppressed_ovr.png"); //$NON-NLS-1$

		declareRegistryImage(IMG_JAVA_STACKTRACE_CONSOLE, T_OBJ + "javastacktrace_console.png"); //$NON-NLS-1$

	}

	/**
     * Declare an Image in the registry table.
     * @param key   The key to use when registering the image
     * @param path  The path where the image can be found. This path is relative to where
     *              this plugin class is found (i.e. typically the packages directory)
     */
    private final static void declareRegistryImage(String key, String path) {
        ImageDescriptor desc = ImageDescriptor.getMissingImageDescriptor();
        Bundle bundle = Platform.getBundle(JDIDebugUIPlugin.getUniqueIdentifier());
        URL url = null;
        if (bundle != null){
            url = FileLocator.find(bundle, new Path(path), null);
            if(url != null) {
            	desc = ImageDescriptor.createFromURL(url);
            }
        }
        fgImageRegistry.put(key, desc);
    }
}