bdc6977680
- added color customization in render-config.xml - added ability to scale size of Venice logo in footer - added ability to customize size of site logo, as well as add a hyperlink - moved to use of LOG4J 1.1.3, LOG4J now installed in Venice lib directory instead of in JRE extensions directory (only Java extensions should go in JRE extensions directory) - close to requiring JAXP 1.1 (will still work with 1.0 though)
305 lines
10 KiB
Java
305 lines
10 KiB
Java
/*
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* The contents of this file are subject to the Mozilla Public License Version 1.1
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* (the "License"); you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at <http://www.mozilla.org/MPL/>.
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*
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* Software distributed under the License is distributed on an "AS IS" basis, WITHOUT
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* WARRANTY OF ANY KIND, either express or implied. See the License for the specific
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* language governing rights and limitations under the License.
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*
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* The Original Code is the Venice Web Communities System.
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*
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* The Initial Developer of the Original Code is Eric J. Bowersox <erbo@silcom.com>,
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* for Silverwrist Design Studios. Portions created by Eric J. Bowersox are
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* Copyright (C) 2001 Eric J. Bowersox/Silverwrist Design Studios. All Rights Reserved.
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*
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* Contributor(s):
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*/
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package com.silverwrist.venice.servlets.format;
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import java.io.Writer;
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import java.io.IOException;
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import java.util.*;
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import javax.servlet.*;
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import javax.servlet.http.*;
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import com.silverwrist.util.StringUtil;
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import com.silverwrist.venice.core.*;
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public class TopDisplay implements ContentRender, ColorSelectors
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{
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/*--------------------------------------------------------------------------------
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* Static data values
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*--------------------------------------------------------------------------------
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*/
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private static final String ATTR_NAME = "com.silverwrist.venice.TopDisplay";
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/*--------------------------------------------------------------------------------
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* Attributes
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*--------------------------------------------------------------------------------
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*/
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private ServletContext ctxt;
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private VeniceEngine engine;
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private UserContext uc;
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private List top_posts;
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private List descrs;
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private VeniceContent[] sideboxes;
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/*--------------------------------------------------------------------------------
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* Constructor
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*--------------------------------------------------------------------------------
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*/
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public TopDisplay(ServletContext ctxt, VeniceEngine engine, UserContext uc)
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throws DataException, AccessError, ErrorBox
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{
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// Stash some basic information.
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this.ctxt = ctxt;
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this.engine = engine;
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this.uc = uc;
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this.top_posts = engine.getPublishedMessages(false);
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this.descrs = uc.getSideBoxList();
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// Create the arrays used to construct sideboxes.
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Class[] ctor_argtypes = new Class[2];
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ctor_argtypes[0] = UserContext.class;
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ctor_argtypes[1] = String.class;
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Object[] ctor_args = new Object[2];
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ctor_args[0] = uc;
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// Create the actual sideboxes.
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sideboxes = new VeniceContent[descrs.size()];
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for (int i=0; i<descrs.size(); i++)
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{ // create each sidebox in turn...
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SideBoxDescriptor d = (SideBoxDescriptor)(descrs.get(i));
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String cn = "com.silverwrist.venice.servlets.format." + d.getClassname();
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try
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{ // get the class name and the constructor pointer
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Class sb_class = Class.forName(cn);
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if (!(VeniceContent.class.isAssignableFrom(sb_class)))
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throw new ErrorBox(null,"Invalid sidebox class: " + cn,null);
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java.lang.reflect.Constructor ctor = sb_class.getDeclaredConstructor(ctor_argtypes);
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// create the side box!
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ctor_args[1] = d.getParameter();
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sideboxes[i] = (VeniceContent)(ctor.newInstance(ctor_args));
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} // end try
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catch (ClassNotFoundException cnfe)
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{ // Class.forName didn't work? yIkes!
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throw new ErrorBox(null,"Cannot find sidebox class: " + cn,null);
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} // end catch
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catch (NoSuchMethodException nsme)
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{ // no constructor matching the prototype? yIkes!
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throw new ErrorBox(null,"Cannot find sidebox class constructor: " + cn,null);
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} // end catch
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catch (SecurityException se)
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{ // how'd we trip the security manager? oh well...
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throw new ErrorBox(null,"Security violation on class: " + cn,null);
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} // end catch
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catch (InstantiationException ie)
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{ // the target class is an abstract class - oh, that's not right!
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throw new ErrorBox(null,"Invalid sidebox class: " + cn,null);
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} // end catch
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catch (IllegalAccessException iae1)
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{ // the constructor isn't public - oh, that's not right!
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throw new ErrorBox(null,"Invalid sidebox class: " + cn,null);
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} // end catch
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catch (IllegalArgumentException iae2)
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{ // the arguments to the constructor are wrong - we should've caught this!
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throw new ErrorBox(null,"Invalid constructor call: " + cn,null);
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} // end catch
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catch (java.lang.reflect.InvocationTargetException ite)
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{ // the constructor itself threw an exception
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Throwable sub_e = ite.getTargetException();
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if (sub_e instanceof DataException)
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throw (DataException)sub_e;
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if (sub_e instanceof AccessError)
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throw (AccessError)sub_e;
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throw new ErrorBox(null,"Unknown exception creating: " + cn,null);
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} // end catch
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} // end for
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} // end constructor
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/*--------------------------------------------------------------------------------
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* External static operations
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*--------------------------------------------------------------------------------
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*/
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public static TopDisplay retrieve(ServletRequest request)
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{
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return (TopDisplay)(request.getAttribute(ATTR_NAME));
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} // end retrieve
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/*--------------------------------------------------------------------------------
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* Implementations from interface VeniceContent
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*--------------------------------------------------------------------------------
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*/
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public String getPageTitle(RenderData rdat)
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{
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return "My Front Page";
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} // end getPageTitle
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/*--------------------------------------------------------------------------------
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* Implementations from interface ContentRender
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*--------------------------------------------------------------------------------
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*/
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public void renderHere(Writer out, RenderData rdat) throws IOException
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{
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// Write out the start of the content structure.
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out.write("<TABLE BORDER=0 ALIGN=CENTER WIDTH=\"100%\" CELLPADDING=4 CELLSPACING=0><TR VALIGN=TOP>\n");
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out.write("<TD ALIGN=LEFT>\n");
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// The top content is a JSP page, so include it here.
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rdat.setRequestAttribute(ATTR_NAME,this);
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RequestDispatcher dispatcher = ctxt.getRequestDispatcher(rdat.getFormatJSPPath("top_content.jsp"));
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out.flush();
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rdat.flushOutput(); // make sure the stuff to be output first is output
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try
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{ // include me!
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rdat.includeDispatch(dispatcher);
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} // end try
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catch (ServletException se)
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{ // since we can't throw ServletException, we throw IOException
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throw new IOException("Failure including top_content.jsp");
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} // end catch
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rdat.flushOutput(); // now make sure the included page is properly flushed
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out.write("</TD>\n<TD ALIGN=CENTER WIDTH=210>\n"); // break to the sidebox column
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for (int i=0; i<sideboxes.length; i++)
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{ // draw in the outer framework of the sidebox
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out.write("<TABLE ALIGN=CENTER WIDTH=200 BORDER=0 CELLPADDING=2 CELLSPACING=0>"
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+ "<TR VALIGN=MIDDLE BGCOLOR=\"" + rdat.getStdColor(SIDEBOX_TITLE_BACKGROUND)
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+ "\"><TD ALIGN=LEFT>\n");
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out.write(rdat.getStdFontTag(SIDEBOX_TITLE_FOREGROUND,3) + "<B>"
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+ StringUtil.encodeHTML(sideboxes[i].getPageTitle(rdat)) + "</B></FONT>\n");
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out.write("</TD></TR><TR VALIGN=TOP BGCOLOR=\"" + rdat.getStdColor(SIDEBOX_CONTENT_BACKGROUND)
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+ "\"><TD ALIGN=LEFT>\n");
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// Fill in the sidebox by calling down to the base.
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if (sideboxes[i] instanceof ContentRender)
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{ // we have a direct-rendering component here - do it
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ContentRender cr = (ContentRender)(sideboxes[i]);
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cr.renderHere(out,rdat);
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} // end if
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else if (sideboxes[i] instanceof JSPRender)
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{ // we have a JSP rendering component here - bounce to the appropriate JSP file
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JSPRender jr = (JSPRender)(sideboxes[i]);
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rdat.storeJSPRender(jr);
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dispatcher = ctxt.getRequestDispatcher(rdat.getFormatJSPPath(jr.getTargetJSPName()));
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out.flush();
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rdat.flushOutput(); // make sure the stuff to be output first is output
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try
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{ // include me!
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rdat.includeDispatch(dispatcher);
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} // end try
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catch (ServletException se)
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{ // since we can't throw ServletException, we throw IOException
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out.write(rdat.getStdFontTag(SIDEBOX_CONTENT_FOREGROUND,2) + "<EM>failure rendering class "
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+ sideboxes[i].getClass().getName() + ": " + StringUtil.encodeHTML(se.getMessage())
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+ "</EM></FONT>\n");
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out.flush();
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} // end catch
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rdat.flushOutput(); // now make sure the included page is properly flushed
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} // end else if
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else // this is bogus - just display a little error here
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out.write(rdat.getStdFontTag(SIDEBOX_CONTENT_FOREGROUND,2) + "<EM>cannot display sidebox of class: "
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+ sideboxes[i].getClass().getName() + "</EM></FONT>\n");
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// close up the framework of this sidebox
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out.write("</TD></TR></TABLE><P>\n");
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} // end for
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if (uc.isLoggedIn())
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{ // write the Configure button below the sideboxes
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out.write("<A HREF=\"" + rdat.getEncodedServletPath("TODO") + "\"><IMG SRC=\""
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+ rdat.getFullImagePath("bn_configure.gif")
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+ "\" ALT=\"Configure\" WIDTH=80 HEIGHT=24 BORDER=0></A>\n");
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} // end if
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// Finish up.
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out.write("</TD>\n</TR></TABLE>");
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} // end renderHere
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/*--------------------------------------------------------------------------------
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* External operations
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*--------------------------------------------------------------------------------
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*/
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public static String getPosterName(TopicMessageContext msg)
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{
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try
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{ // have to guard agains a DataException here
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return msg.getCreatorName();
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} // end try
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catch (DataException de)
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{ // just return "unknown" on failure
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return "(unknown)";
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} // end catch
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} // end getPosterName
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public static String getMessageBodyText(TopicMessageContext msg)
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{
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try
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{ // have to guard against a DataException here
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return msg.getBodyText();
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} // end try
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catch (DataException de)
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{ // just return an error message
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return "<EM>(Unable to retrieve message data: " + StringUtil.encodeHTML(de.getMessage()) + ")</EM>";
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} // end catch
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} // end getMessageBodyText
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public int getNumTopPosts()
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{
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return top_posts.size();
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} // end getNumTopPosts
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public TopicMessageContext getTopPost(int index)
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{
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return (TopicMessageContext)(top_posts.get(index));
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} // end getTopPost
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public boolean displayWelcome()
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{
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return !(uc.isLoggedIn());
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} // end displayWelcome
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} // end class TopDisplay
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