inputhtmlrenderer.java

一个使用struts+hibernate+spring开发的完的网站源代码。

/*
 * Copyright 2004 The Apache Software Foundation.
 * 
 * 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 org.apache.myfaces.custom.inputHtml;

import java.io.IOException;
import java.util.Map;

import javax.faces.component.EditableValueHolder;
import javax.faces.component.UIComponent;
import javax.faces.component.UIForm;
import javax.faces.context.FacesContext;
import javax.faces.context.ResponseWriter;
import javax.faces.convert.ConverterException;

import org.apache.myfaces.component.UserRoleUtils;
import org.apache.myfaces.component.html.util.AddResource;
import org.apache.myfaces.renderkit.RendererUtils;
import org.apache.myfaces.renderkit.html.HTML;
import org.apache.myfaces.renderkit.html.HtmlRenderer;
import org.apache.myfaces.renderkit.html.HtmlRendererUtils;
import org.apache.myfaces.renderkit.html.util.HTMLEncoder;
import org.apache.myfaces.renderkit.html.util.JavascriptUtils;

/**
 * @author Sylvain Vieujot (latest modification by $Author: svieujot $)
 * @version $Revision: 1.1 $ $Date: 2005/03/26 20:31:37 $
 * $Log: InputHtmlRenderer.java,v $
 * Revision 1.1  2005/03/26 20:31:37  svieujot
 * Rename x:htmlEditor to x:inputHtml.
 *
 * Revision 1.26  2005/03/15 21:24:41  svieujot
 * Style handling improvements.
 *
 * Revision 1.25  2005/03/15 05:24:03  svieujot
 * Add a fallback textarea mode to the htmlEditor.
 *
 * Revision 1.24  2005/03/09 04:13:52  svieujot
 * htmlEditor : remove unused scripts
 *
 * Revision 1.23  2005/03/09 04:07:22  svieujot
 * htmlEditor : Kupu 1.2rc2 update
 *
 * Revision 1.22  2005/02/08 14:24:45  svieujot
 * Temporarily hide unimplemented functionalities (internal images library & internal links library).
 *
 * Revision 1.21  2005/02/07 01:40:42  svieujot
 * style attribute fix.
 *
 * Revision 1.20  2005/02/06 19:45:32  svieujot
 * Add allowExternalLinks attribute.
 *
 * Revision 1.19  2005/02/05 23:07:45  svieujot
 * x:htmlEditor Add full page mode (zoom) & bugfixes
 *
 * Revision 1.18  2005/02/05 18:51:21  svieujot
 * x:htmlEditor : Upgrade to Kupu 1.2rc1, remove formularMode (too experimental), bugfixes.
 *
 * Revision 1.17  2005/01/02 20:39:16  svieujot
 * HtmlEditor can now process HTML documents and HTML fragments.
 *
 * Revision 1.16  2004/12/27 04:11:11  mmarinschek
 * Data Table stores the state of facets of children; script tag is rendered with type attribute instead of language attribute, popup works better as a column in a data table
 *
 * Revision 1.15  2004/12/10 02:16:26  svieujot
 * Start implementing UserRoleAware.
 *
 * Revision 1.14  2004/12/09 05:19:12  svieujot
 * Bugfix for submitted values that were not taken care of.
 *
 * Revision 1.13  2004/12/08 04:36:27  svieujot
 * Cancel last *source attributes, and make style and styleClass more modular.
 *
 * Revision 1.12  2004/12/08 04:13:56  svieujot
 * Add styleSource and styleClassSource for the htmlEditor source window.
 *
 * Revision 1.11  2004/12/06 04:26:07  svieujot
 * Make HtmlEditor UserRoleAware.
 *
 * Revision 1.10  2004/12/06 01:03:42  svieujot
 * Bugfix : getter now use boolean instead of Boolean, and setters created.
 *
 * Revision 1.9  2004/12/04 03:50:44  svieujot
 * Remove bug for IE
 *
 * Revision 1.8  2004/12/04 03:26:28  svieujot
 * Various bug fixes
 *
 * Revision 1.7  2004/12/04 02:09:42  svieujot
 * Several small fixes.
 *
 * Revision 1.6  2004/12/04 00:40:25  svieujot
 * htmlEditor : add style and styleClass attributes.
 *
 * Revision 1.5  2004/12/04 00:20:00  svieujot
 * htmlEditor : Add a formular mode, and more sensible defaults.
 *
 * Revision 1.4  2004/12/03 21:59:09  svieujot
 * Initial set of htmlEditor attributes.
 *
 * Revision 1.3  2004/12/03 12:55:30  svieujot
 * Get ride of the save button / process.
 *
 * Revision 1.2  2004/12/03 08:31:28  manolito
 * writer.append copy'n'paste error?
 *
 * Revision 1.1  2004/12/02 22:28:30  svieujot
 * Add an x:htmlEditor based on the Kupu library.
 */
public class InputHtmlRenderer extends HtmlRenderer {
    // TODO : Finish Disabled mode.
    // TODO : Automatic Fallback for non kupu capable browsers (Safari, smartphones, non javascript, ...).
    // TODO : Make Image & Link Library work.

    protected boolean isDisabled(FacesContext facesContext, UIComponent uiComponent) {
        if( !UserRoleUtils.isEnabledOnUserRole(uiComponent) )
            return false;

        return ((InputHtml)uiComponent).isDisabled();
    }
	
	private static boolean useFallback(InputHtml editor){
		// TODO : Handle fallback="auto"
		return editor.getFallback().equals("true");
	}
    
    public void encodeEnd(FacesContext context, UIComponent uiComponent) throws IOException {
        RendererUtils.checkParamValidity(context, uiComponent, InputHtml.class);
		InputHtml editor = (InputHtml) uiComponent;
		if( useFallback(editor) )
			encodeEndFallBackMode(context, editor);
		else
			encodeEndNormalMode(context, editor);
    }
	
	private void encodeEndFallBackMode(FacesContext context, InputHtml editor) throws IOException {
		String clientId = editor.getClientId(context);	
		// Use only a textarea
		ResponseWriter writer = context.getResponseWriter();
        writer.startElement(HTML.TEXTAREA_ELEM, editor);

        writer.writeAttribute(HTML.NAME_ATTR, clientId, null);
        HtmlRendererUtils.writeIdIfNecessary(writer, editor, context);
		
		if( editor.getStyle()!=null )
            writer.writeAttribute(HTML.STYLE_ATTR, editor.getStyle(), null);
		if( editor.getStyleClass()!=null )
            writer.writeAttribute(HTML.STYLE_CLASS_ATTR, editor.getStyleClass(), null);

        if (isDisabled(context, editor))
            writer.writeAttribute(HTML.DISABLED_ATTR, Boolean.TRUE, null);

        String text = RendererUtils.getStringValue(context, editor);
        writer.write( htmlToPlainText( text ) );

        writer.endElement(HTML.TEXTAREA_ELEM);
	}
	
	private static String htmlToPlainText(String html){
		return getHtmlBody( html ).replaceAll("<br.*>","\n");
	}
	
	private static String getHtmlBody(String html){
		String lcText = html.toLowerCase();
        int textLength = lcText.length();
        int bodyStartIndex = 0;
        while(bodyStartIndex < textLength){
            bodyStartIndex = lcText.indexOf("<body");
            if( bodyStartIndex == -1 )
                break; // not found.
            
            bodyStartIndex += 5;
            char c = lcText.charAt(bodyStartIndex);
            if( c=='>' ){
                break;
            }
            
            if( c!=' ' && c!='\t' )
                continue;
            
            bodyStartIndex = lcText.indexOf('>', bodyStartIndex);
        }
        bodyStartIndex++;
        
        int bodyEndIndex = lcText.lastIndexOf("</body>")-1;
        
        if( bodyStartIndex<0 || bodyEndIndex<0
           || bodyStartIndex > bodyEndIndex
           || bodyStartIndex>=textLength || bodyEndIndex>=textLength ){
            return html.trim();
        }
        
        return html.substring(bodyStartIndex, bodyEndIndex+1).trim();
	}
	
	private void encodeEndNormalMode(FacesContext context, InputHtml editor) throws IOException {
		String clientId = editor.getClientId(context);
        String formId;
        {
            UIComponent tmpComponent = editor.getParent();
            while(!(tmpComponent instanceof UIForm) ){
                tmpComponent = tmpComponent.getParent();
            }
            formId = tmpComponent.getClientId(context);
        }
            
        
        AddResource.addStyleSheet(InputHtmlRenderer.class, "kupustyles.css", context);