460 lines
12 KiB
Java
460 lines
12 KiB
Java
//This file is part of SECONDO.
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//Copyright (C) 2004, University in Hagen, Department of Computer Science,
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//Database Systems for New Applications.
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//SECONDO is free software; you can redistribute it and/or modify
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//it under the terms of the GNU General Public License as published by
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//the Free Software Foundation; either version 2 of the License, or
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//(at your option) any later version.
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//SECONDO is distributed in the hope that it will be useful,
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//but WITHOUT ANY WARRANTY; without even the implied warranty of
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//MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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//GNU General Public License for more details.
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//You should have received a copy of the GNU General Public License
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//along with SECONDO; if not, write to the Free Software
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//Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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package viewer.hoese.algebras;
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import sj.lang.ListExpr;
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import viewer.*;
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import viewer.hoese.*;
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import java.awt.*;
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import java.awt.event.*;
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import javax.swing.*;
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import javax.swing.text.EditorKit;
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import javax.swing.text.Document;
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import tools.Base64Decoder;
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import tools.Reporter;
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import java.io.*;
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import java.util.*;
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import java.util.regex.*;
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/**
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* A displayclass for the html formatted code
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*/
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public class Dsplpage extends Dsplhtml{
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private ListExpr files;
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private TreeMap map = new TreeMap(); // mapping between urls and files
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private static int count;
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/** Creates a new Instance of this.
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*/
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public Dsplpage(){
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if(Display==null){
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Display = new HTMLViewerFrame();
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}
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count = 0;
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}
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public String toString(){
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return Entry;
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}
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protected String changeImgTag(String orig){
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String attr = "(("+pattern_string +")|("+pattern_symbol+"))";
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String src = "[sS][Rr][cC]\\s*=\\s*";
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Pattern p = Pattern.compile(src+attr);
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Matcher m = p.matcher(orig);
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if(!m.find()){
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return orig;
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}
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String source = m.group();
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source = source.replaceAll("^"+src,"");
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Dsplurl.Url url = new Dsplurl.Url();
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source = source.trim();
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if(source.matches(pattern_string)){
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source = source.substring(1,source.length()-1);
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}
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url.readFrom(source,this.url);
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int pos = source.lastIndexOf(".");
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String ext;
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if(pos<0){
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ext = "";
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} else {
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ext = source.substring(pos);
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}
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String fname ="tmp/file"+count+ext;
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count++;
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map.put(url,fname);
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File f = new File(fname);
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return orig.replaceAll(src+attr,"src=\"file://"+f.getAbsolutePath()+"\"");
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}
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protected String changeLinkTag(String orig){
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String attr = "(("+pattern_string +")|("+pattern_symbol+"))";
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String src = "[hH][rR][eE][fF]\\s*=\\s*";
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Pattern p = Pattern.compile(src+attr);
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Matcher m = p.matcher(orig);
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if(!m.find()){
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return orig;
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}
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String source = m.group();
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source = source.replaceAll("^"+src,"");
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Dsplurl.Url url = new Dsplurl.Url();
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source = source.trim();
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if(source.matches(pattern_string)){
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source = source.substring(1,source.length()-1);
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}
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url.readFrom(source,this.url);
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int pos = source.lastIndexOf(".");
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String ext;
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if(pos<0){
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ext = "";
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} else {
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ext = source.substring(pos);
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}
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String fname ="tmp/file"+count+ext;
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count++;
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map.put(url,fname);
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File f = new File(fname);
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return orig.replaceAll(src+attr,"src=\"file://"+f.getAbsolutePath()+"\"");
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}
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protected boolean scanValue(ListExpr value){
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if(value.listLength()<1){
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Reporter.debug("wrong listlength for page "+ value.listLength());
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return false;
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}
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ListExpr html = value.first();
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if(html.listLength()!=2){ // (type value)
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return false;
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}
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html = html.second();
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if(!super.scanValue(html)){
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files = null;
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return false;
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}
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files = value.rest();
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return true;
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}
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public void init ( String name , int nameWidth,int indent,
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ListExpr type, ListExpr value, QueryResult qr)
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{
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String T = new String(type.symbolValue());
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String V;
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defined = !isUndefined(value);
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if(!defined){
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V = "undefined";
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content="undefined";
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}else{
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V = "Page";
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scanValue(value);
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}
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T=extendString(T,nameWidth, indent);
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String Text = V;
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Entry = T + " : <page> ...";
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qr.addEntry(this);
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return;
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}
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public void displayExtern(){
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Display.setSource(this);
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Display.setVisible(true);
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}
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public boolean isExternDisplayed(){
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return Display.isVisible() && this.equals(Display.getSource());
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}
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private static boolean isWhiteSpace(char c){
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return WHITESPACES.indexOf(c)>=0;
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}
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private static HTMLViewerFrame Display=null;
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private String Entry;
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private int Type; // contains the type which is the text (probably)
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private static final int MAX_DIRECT_DISPLAY_LENGTH = 30;
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private static final String WHITESPACES = " \t\n\r";
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private static class HTMLViewerFrame extends JFrame{
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public HTMLViewerFrame(){
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getContentPane().setLayout(new BorderLayout());
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Display = new JEditorPane();
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Display.setContentType("text/html");
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TextScrollPane = new JScrollPane(Display);
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TextPanel = new JPanel(new BorderLayout());
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JPanel SearchPanel = new JPanel();
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SearchPanel.add(CaseSensitive);
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SearchPanel.add(SearchField);
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SearchPanel.add(SearchBtn);
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SearchBtn.addActionListener(new ActionListener(){
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public void actionPerformed(ActionEvent evt){
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searchText();
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}
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});
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SearchField.addKeyListener(new KeyListener(){
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public void keyPressed(KeyEvent evt){
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if(evt.getKeyCode()==KeyEvent.VK_ENTER)
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searchText();
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}
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public void keyTyped(KeyEvent evt){}
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public void keyReleased(KeyEvent evt){}
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});
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TextPanel.add(TextScrollPane,BorderLayout.CENTER);
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TextPanel.add(SearchPanel,BorderLayout.SOUTH);
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getContentPane().add(TextPanel,BorderLayout.CENTER);
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CloseBtn = new JButton("Close");
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CloseBtn.addActionListener(new ActionListener(){
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public void actionPerformed(ActionEvent evt){
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TheText=null;
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HTMLViewerFrame.this.setVisible(false);
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}
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} );
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fileChooser = new JFileChooser();
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SaveBtn = new JButton("Save");
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SaveBtn.addActionListener(new ActionListener(){
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public void actionPerformed(ActionEvent evt){
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if(fileChooser.showSaveDialog(HTMLViewerFrame.this)==JFileChooser.APPROVE_OPTION){
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File F = HTMLViewerFrame.this.fileChooser.getSelectedFile();
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try{
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BufferedOutputStream out = new BufferedOutputStream(new FileOutputStream(F));
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out.write(TheText.getBytes());
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out.flush();
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out.close();
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}catch(Exception e){
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Reporter.debug(e);
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Reporter.showError("Error in saving file ");
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}
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}
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}
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});
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FormatBtn.addActionListener(new ActionListener(){
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public void actionPerformed(ActionEvent evt){
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switchView(FormatBtn.getText().equals(TXT_SOURCE));
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}
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});
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JPanel ControlPanel = new JPanel();
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ControlPanel.add(CloseBtn);
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ControlPanel.add(SaveBtn);
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ControlPanel.add(FormatBtn);
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getContentPane().add(ControlPanel,BorderLayout.SOUTH);
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setSize(640,480);
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}
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public void switchView(boolean toSrc){
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if(toSrc){
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FormatBtn.setText(TXT_HTML);
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Display.setContentType("text/plain");
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Display.setText(TheText);
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Display.setCaretPosition(0);// go to top
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} else {
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try{
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FormatBtn.setText(TXT_SOURCE);
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Display.setContentType("text/html");
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Display.setText(TheText);
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Display.setCaretPosition(0);// go to top
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}catch(Exception e){
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Reporter.debug(e);
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Reporter.showError("error in rendering html content");
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switchView(true);
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}
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}
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}
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/** searchs the text in the textfield in the document and
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* marks its if found
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*/
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private void searchText(){
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String Text = SearchField.getText();
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if(Text.length()==0){
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Reporter.showError("no text to search");
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return;
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}
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try{
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Document Doc = Display.getDocument();
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String DocText = Doc.getText(0,Doc.getLength());
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if(!CaseSensitive.isSelected()){
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DocText = DocText.toUpperCase();
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Text = Text.toUpperCase();
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}
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int pos = DocText.indexOf(Text,LastSearchPos);
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if(pos<0){
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Reporter.showError("end of text is reached");
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LastSearchPos=0;
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return;
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}
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pos = pos;
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int i1 = pos;
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int i2 = pos+Text.length();
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LastSearchPos = pos+1;
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Display.setCaretPosition(i1);
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Display.moveCaretPosition(i2);
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Display.getCaret().setSelectionVisible(true);
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} catch(Exception e){
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Reporter.debug(e);
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Reporter.showError("error in searching text");
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}
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}
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public void setSource(Dsplpage S){
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deleteFiles(Source);
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Source = S;
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LastSearchPos=0;
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Display.setEditable(false);
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TheText = S.content;
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try{
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Display.setText(TheText);
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switchView(false); // show html if possible
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} catch(Exception e){
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Reporter.debug("Error in setting text");
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Display.setText("");
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}
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Display.setCaretPosition(0);// go to top
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getContentPane().add(TextPanel,BorderLayout.CENTER);
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createFiles(S.files,S.map);
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invalidate();validate();repaint();
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}
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private void deleteFiles(Dsplpage source){
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if(source ==null){
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return;
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}
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TreeMap map = source.map;
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Iterator it = map.keySet().iterator();
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while(it.hasNext()){
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String name = (String) map.get(it.next());
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if(name==null){
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Reporter.debug("url not mapped");
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} else {
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File F = new File(name);
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if(F.exists()){
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boolean succ = F.delete();
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if(!succ){
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Reporter.writeError("cannot delete the file "+F);
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}
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} else{
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Reporter.writeError("try to delete the file " +F + ", but it does not exist");
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}
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}
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}
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}
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private void createFiles(ListExpr files, TreeMap map){
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if(files.atomType()!=ListExpr.NO_ATOM){
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Reporter.debug("invalid list for embedded files");
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return;
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}
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while(!files.isEmpty()){
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ListExpr file = files.first();
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files = files.rest();
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if(file.listLength()!=3){
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Reporter.debug("invalid list length for embedded file");
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} else {
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Dsplurl.Url url = new Dsplurl.Url();
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ListExpr urlList = file.first();
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if(urlList.listLength()==2){
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urlList = urlList.second();
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}
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if(!url.readFrom(urlList)){
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Reporter.debug("cannot extract url from " + file.first());
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} else {
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String fName = (String) map.get(url);
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if(fName==null){
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Reporter.debug("url " + url+" is not mapped");
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} else {
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try{
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String text = file.second().textValue();
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byte[] content = Base64Decoder.decode(text);
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FileOutputStream out = new FileOutputStream(fName);
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for(int i=0;i<content.length;i++){
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out.write(content[i]);
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}
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out.close();
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(new File(fName)).deleteOnExit();
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} catch(Exception e){
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Reporter.debug(e);
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Reporter.debug("Error in extracting file");
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}
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}
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}
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}
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}
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}
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public Dsplhtml getSource(){
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return Source;
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}
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private JEditorPane Display;
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private JButton CloseBtn;
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private JButton SaveBtn;
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private JFileChooser fileChooser;
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private Dsplpage Source;
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private String TheText;
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private static JScrollPane TextScrollPane;
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private static JPanel TextPanel;
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private JCheckBox CaseSensitive = new JCheckBox("case sensitive");
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private JTextField SearchField = new JTextField(20);
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private JButton SearchBtn = new JButton("search");
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private final static String TXT_SOURCE = "source";
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private final static String TXT_HTML = "html";
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private JButton FormatBtn = new JButton(TXT_SOURCE);
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private int LastSearchPos=0;
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}
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//public static final String pattern_string = "(\"((\\\\\")|([^\"]))*\")|('((\\\\')|([^']))*')";
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public static final String pattern_string = "(\"((\\\\\")|([^\"]))*\")";
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public static final String pattern_symbol = "[^\\s\"]+";
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}
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