/*
* Copyright 2009 Google Inc.
*
* 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.google.gwt.dev.ui;
import com.google.gwt.core.ext.TreeLogger;
import com.google.gwt.core.ext.TreeLogger.Type;
import com.google.gwt.dev.ModuleHandle;
import com.google.gwt.dev.util.log.PrintWriterTreeLogger;
import java.net.URL;
import java.util.HashMap;
import java.util.Map;
/**
* Defines the interaction between DevelopmentMode and the UI, so that
* alternate UIs can be implemented.
* <p>
* Sequence of calls:
* <ul>
* <li>{@link #initialize(Type)}
* <li>{@link #getTopLogger()}
* <li>possibly {@link #getWebServerLogger(String, byte[])}
* <li>{@link #setStartupUrls(Map)}
* <li>{@link #moduleLoadComplete(boolean)} or
* <li>zero or more {@link #getModuleLogger}
* </ul>
* {@link #setCallback(com.google.gwt.dev.ui.UiEvent.Type, UiCallback)} may be
* interspersed among these calls after {@link #initialize(Type)} is called.
*/
public abstract class DevModeUI {
/**
* Map of callbacks.
*/
private final Map<UiEvent.Type<? extends UiCallback>, UiCallback> callbacks
= new HashMap<UiEvent.Type<? extends UiCallback>, UiCallback>();
/**
* A lazily-initialized console logger - see {@link #getConsoleLogger()}.
*/
private PrintWriterTreeLogger consoleLogger = null;
/**
* Log level for all logging in this UI.
*/
private Type logLevel;
/**
* Show that a module is loaded in the UI.
*
* <p>Note that the {@link CloseModuleEvent} should already have a callback
* registered when this is called if needed -- the UI is not required to
* change the UI if it is registered later.
*
* @param userAgent full user agent name
* @param remoteSocket name of remote socket endpoint in host:port format
* @param url URL of top-level window
* @param tabKey stable browser tab identifier, or the empty string if no
* such identifier is available
* @param moduleName the name of the module loaded
* @param sessionKey a unique session key
* @param agentTag short-form user agent identifier, suitable for use in
* a label for this connection
* @param agentIcon icon to use for the user agent (fits inside 24x24) or
* null if unavailable
* @param logLevel logging detail requested
* @return a handle to the module
*/
public abstract ModuleHandle getModuleLogger(String userAgent,
String remoteSocket, String url, String tabKey, String moduleName,
String sessionKey, String agentTag, byte[] agentIcon, Type logLevel);
/**
* Create a top-level logger for messages which are not associated with the
* web server or any module. Defaults to logging to stdout.
*
* @return TreeLogger instance to use
*/
public TreeLogger getTopLogger() {
return getConsoleLogger();
}
/**
* Create the web server portion of the UI if not already created, and
* return its TreeLogger instance.
*
* <p>Note that the {@link RestartServerEvent} should already have a callback
* registered when this is called -- the UI is not required to change the
* UI if it is registered later.
*
* @param serverName short name of the web server or null if only the icon
* should be used
* @param serverIcon byte array containing an icon (fitting into 24x24) to
* use for the server, or null if only the name should be used
* @return TreeLogger instance
*/
public abstract TreeLogger getWebServerLogger(String serverName,
byte[] serverIcon);
/**
* Initialize the UI - must be called exactly once and before any other method
* on this class.
*
* <p>Subclasses should call super.initialize(logLevel).
*
* @param logLevel log level for all logging
*/
public void initialize(Type logLevel) {
this.logLevel = logLevel;
}
/**
* Indicates that all modules have been loaded (loading the XML, not
* completing onModuleLoad), and that URLs previously specified in
* {@link #setStartupUrls(Map)} may be launched if successful.
*
* @param success true if all modules were successfully loaded
*/
public void moduleLoadComplete(boolean success) {
// do nothing by default
}
/**
* Sets the callback for a given event type..
*
* @param <C> callback type
* @param type UI event type token
* @param callback event callback, or null to clear the callback
*/
public final <C extends UiCallback> void setCallback(UiEvent.Type<C> type,
C callback) {
assert type != null;
callbacks.put(type, callback);
}
/**
* Set the URLs that should be available to start.
*
* @param urls map of URLs -- the key is the name supplied with -startupUrls,
* and the value is the mapped URL with all parameters included
*/
public void setStartupUrls(Map<String, URL> urls) {
// do nothing by default
}
/**
* Call callback for a given event.
*
* @param eventType type of event
* @return the UiCallback for this event or null if none
*/
@SuppressWarnings("unchecked")
protected final <C extends UiCallback> C getCallback(
UiEvent.Type<?> eventType) {
return (C) callbacks.get(eventType);
}
/**
* @return a console-based logger.
*/
protected final TreeLogger getConsoleLogger() {
if (consoleLogger == null) {
consoleLogger = new PrintWriterTreeLogger();
consoleLogger.setMaxDetail(getLogLevel());
}
return consoleLogger;
}
/**
* @return the log level for all logging.
*/
protected final Type getLogLevel() {
return logLevel;
}
/**
* Returns true if a callback has been registered for an event.
*
* @param eventType type of event
* @return true if a callback has been registered for event
*/
protected final boolean hasCallback(
UiEvent.Type<? extends UiCallback> eventType) {
return callbacks.get(eventType) != null;
}
}