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/*******************************************************************************
* Copyright 2007-2013 See AUTHORS file.
 * 
* 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 xworker.swt.actions;

import java.io.IOException;
import java.io.InputStream;

import ognl.OgnlException;

import org.eclipse.swt.custom.StyledText;
import org.xmeta.ActionContext;
import org.xmeta.Thing;

import xworker.swt.custom.StyledTextInputStreamRunnable;
import xworker.swt.util.VerifyEventToInputStream;

public class StyledTextActions {
	/**
	 * 绑定InputStream到StyledText。
	 * 
	 * @param actionContext
	 * @return
	 * @throws OgnlException
	 */
	public static Object bindInputStream(ActionContext actionContext) throws OgnlException{
		Thing self = (Thing) actionContext.get("self");
		StyledText text = (StyledText) self.doAction("getStyledText", actionContext);
		InputStream inputStream = (InputStream) self.doAction("getInputStream", actionContext);
		boolean autoScroolToBottom = self.getBoolean("autoScroolToBottom");
		
		if(text != null && inputStream != null){
			String charset = self.getStringBlankAsNull("charset");
			if(charset == null){
				charset = "utf-8";
			}
			StyledTextInputStreamRunnable run = new StyledTextInputStreamRunnable(text, inputStream, autoScroolToBottom, charset);
			if(self.getBoolean("createThread")){
				new Thread(run).start();
			}else{
				run.run();
			}
			
			return run;
		}else{
			return null;
		}
	}
	
	public static void keyInputToInputStream(ActionContext actionContext) throws IOException{
		Thing self = (Thing) actionContext.get("self");
		StyledText text = (StyledText) self.doAction("getStyledText", actionContext);
		VerifyEventToInputStream listener = new VerifyEventToInputStream(self.getBoolean("eventDoit"));
		text.addVerifyKeyListener(listener);
		String inputStreamVarName = self.getStringBlankAsNull("inputStreamVarName");
		if(inputStreamVarName != null){
			actionContext.getScope(0).put(inputStreamVarName, listener.getInputStream());
		}
		actionContext.getScope(0).put(self.getMetadata().getName(), listener);
	}
	
	public static void append(ActionContext actionContext){
		Thing self = (Thing) actionContext.get("self");
		StyledText styledText = (StyledText) self.doAction("getStyledText", actionContext);
		String text = (String) self.doAction("getText", actionContext);
		if(styledText != null && text != null){
			styledText.append(text);
			if(self.getBoolean("autoScroolToBottom")){
				styledText.setCaretOffset(styledText.getText().length());
				styledText.showSelection();
			}
		}
	}
}