/jEdit/tags/jedit-4-2-pre14/org/gjt/sp/jedit/help/HelpIndex.java
Java | 396 lines | 281 code | 44 blank | 71 comment | 43 complexity | d2cf4e531bdf7771f57df4607aedd00b MD5 | raw file
Possible License(s): BSD-3-Clause, AGPL-1.0, Apache-2.0, LGPL-2.0, LGPL-3.0, GPL-2.0, CC-BY-SA-3.0, LGPL-2.1, GPL-3.0, MPL-2.0-no-copyleft-exception, IPL-1.0
- /*
- * HelpIndex.java - Index for help searching feature
- * :tabSize=8:indentSize=8:noTabs=false:
- * :folding=explicit:collapseFolds=1:
- *
- * Copyright (C) 2002 Slava Pestov
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * as published by the Free Software Foundation; either version 2
- * of the License, or any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
- */
- package org.gjt.sp.jedit.help;
- //{{{ Imports
- import java.io.*;
- import java.net.*;
- import java.util.zip.*;
- import java.util.*;
- import org.gjt.sp.jedit.io.*;
- import org.gjt.sp.jedit.*;
- import org.gjt.sp.util.Log;
- //}}}
- class HelpIndex
- {
- //{{{ HelpIndex constructor
- public HelpIndex()
- {
- words = new HashMap();
- files = new ArrayList();
- ignoreWord("a");
- ignoreWord("an");
- ignoreWord("and");
- ignoreWord("are");
- ignoreWord("as");
- ignoreWord("be");
- ignoreWord("by");
- ignoreWord("can");
- ignoreWord("do");
- ignoreWord("for");
- ignoreWord("from");
- ignoreWord("how");
- ignoreWord("i");
- ignoreWord("if");
- ignoreWord("in");
- ignoreWord("is");
- ignoreWord("it");
- ignoreWord("not");
- ignoreWord("of");
- ignoreWord("on");
- ignoreWord("or");
- ignoreWord("s");
- ignoreWord("that");
- ignoreWord("the");
- ignoreWord("this");
- ignoreWord("to");
- ignoreWord("will");
- ignoreWord("with");
- ignoreWord("you");
- } //}}}
- /* //{{{ HelpIndex constructor
- public HelpIndex(String fileListPath, String wordIndexPath)
- {
- this();
- } //}}} */
- //{{{ indexEditorHelp() method
- /**
- * Indexes all available help, including the jEdit user's guide, FAQ,]
- * and plugin documentation.
- */
- public void indexEditorHelp()
- {
- try
- {
- String jEditHome = jEdit.getJEditHome();
- if(jEditHome != null)
- {
- indexDirectory(MiscUtilities.constructPath(jEditHome,"doc","users-guide"));
- indexDirectory(MiscUtilities.constructPath(jEditHome,"doc","FAQ"));
- indexDirectory(MiscUtilities.constructPath(jEditHome,"doc","news42"));
- }
- }
- catch(Throwable e)
- {
- Log.log(Log.ERROR,this,"Error indexing editor help");
- Log.log(Log.ERROR,this,e);
- }
- PluginJAR[] jars = jEdit.getPluginJARs();
- for(int i = 0; i < jars.length; i++)
- {
- try
- {
- indexJAR(jars[i].getZipFile());
- }
- catch(Throwable e)
- {
- Log.log(Log.ERROR,this,"Error indexing JAR: "
- + jars[i].getPath());
- Log.log(Log.ERROR,this,e);
- }
- }
- Log.log(Log.DEBUG,this,"Indexed " + words.size() + " words");
- } //}}}
- //{{{ indexDirectory() method
- /**
- * Indexes all HTML and text files in the specified directory.
- * @param dir The directory
- */
- public void indexDirectory(String dir) throws Exception
- {
- String[] files = VFSManager.getFileVFS()
- ._listDirectory(null,dir,"*.{html,txt}",true,null);
- for(int i = 0; i < files.length; i++)
- {
- indexURL(files[i]);
- }
- } //}}}
- //{{{ indexJAR() method
- /**
- * Indexes all HTML and text files in the specified JAR file.
- * @param jar The JAR file
- */
- public void indexJAR(ZipFile jar) throws Exception
- {
- Enumeration e = jar.entries();
- while(e.hasMoreElements())
- {
- ZipEntry entry = (ZipEntry)e.nextElement();
- String name = entry.getName();
- String lname = name.toLowerCase();
- if(lname.endsWith(".html")/* || lname.endsWith(".txt") */)
- {
- // only works for jEdit plugins
- String url = "jeditresource:/" +
- MiscUtilities.getFileName(jar.getName())
- + "!/" + name;
- Log.log(Log.DEBUG,this,url);
- indexStream(jar.getInputStream(entry),url);
- }
- }
- } //}}}
- //{{{ indexURL() method
- /**
- * Reads the specified HTML file and adds all words defined therein to the
- * index.
- * @param url The HTML file's URL
- */
- public void indexURL(String url) throws Exception
- {
- InputStream _in;
- if(MiscUtilities.isURL(url))
- _in = new URL(url).openStream();
- else
- {
- _in = new FileInputStream(url);
- // hack since HelpViewer needs a URL...
- url = "file:" + url;
- }
- indexStream(_in,url);
- } //}}}
- //{{{ lookupWord() method
- public Word lookupWord(String word)
- {
- Object o = words.get(word);
- if(o == IGNORE)
- return null;
- else
- return (Word)o;
- } //}}}
- //{{{ getFile() method
- public HelpFile getFile(int index)
- {
- return (HelpFile)files.get(index);
- } //}}}
- //{{{ Private members
- private static Word.Occurrence[] EMPTY_ARRAY = new Word.Occurrence[0];
- // used to mark words to ignore (see constructor for the list)
- private static Object IGNORE = new Object();
- private HashMap words;
- private ArrayList files;
- //{{{ ignoreWord() method
- private void ignoreWord(String word)
- {
- words.put(word,IGNORE);
- } //}}}
- //{{{ indexStream() method
- /**
- * Reads the specified HTML file and adds all words defined therein to the
- * index.
- * @param _in The input stream
- * @param file The file
- */
- private void indexStream(InputStream _in, String fileName)
- throws Exception
- {
- HelpFile file = new HelpFile(fileName);
- files.add(file);
- int index = files.size() - 1;
- StringBuffer titleText = new StringBuffer();
- BufferedReader in = new BufferedReader(
- new InputStreamReader(_in));
- try
- {
- StringBuffer word = new StringBuffer();
- boolean insideTag = false;
- boolean insideEntity = false;
- boolean title = false;
- int c;
- while((c = in.read()) != -1)
- {
- char ch = (char)c;
- if(insideTag)
- {
- if(ch == '>')
- {
- if(word.toString().equals("title"))
- title = true;
- insideTag = false;
- word.setLength(0);
- }
- else
- word.append(ch);
- }
- else if(insideEntity)
- {
- if(ch == ';')
- insideEntity = false;
- }
- else if(ch == '<')
- {
- if(title)
- title = false;
- if(word.length() != 0)
- {
- addWord(word.toString(),index,title);
- word.setLength(0);
- }
- insideTag = true;
- }
- else if(ch == '&')
- insideEntity = true;
- else if(title)
- titleText.append(ch);
- else if(!Character.isLetterOrDigit(ch))
- {
- if(word.length() != 0)
- {
- addWord(word.toString(),index,title);
- word.setLength(0);
- }
- }
- else
- word.append(ch);
- }
- }
- finally
- {
- in.close();
- }
- if(titleText.length() == 0)
- file.title = fileName;
- else
- file.title = titleText.toString();
- } //}}}
- //{{{ addWord() method
- private void addWord(String word, int file, boolean title)
- {
- word = word.toLowerCase();
- Object o = words.get(word);
- if(o == IGNORE)
- return;
- if(o == null)
- words.put(word,new Word(word,file,title));
- else
- ((Word)o).addOccurrence(file,title);
- } //}}}
- //}}}
- //{{{ Word class
- static class Word
- {
- // how much an occurrence in the title is worth
- static final int TITLE_OCCUR = 10;
- // the word
- String word;
- // files it occurs in
- int occurCount = 0;
- Occurrence[] occurrences;
- Word(String word, int file, boolean title)
- {
- this.word = word;
- occurrences = new Occurrence[5];
- addOccurrence(file,title);
- }
- void addOccurrence(int file, boolean title)
- {
- for(int i = 0; i < occurCount; i++)
- {
- if(occurrences[i].file == file)
- {
- occurrences[i].count += (title ? TITLE_OCCUR : 1);
- return;
- }
- }
- if(occurCount >= occurrences.length)
- {
- Occurrence[] newOccur = new Occurrence[occurrences.length * 2];
- System.arraycopy(occurrences,0,newOccur,0,occurCount);
- occurrences = newOccur;
- }
- occurrences[occurCount++] = new Occurrence(file,title);
- }
- static class Occurrence
- {
- int file;
- int count;
- Occurrence(int file, boolean title)
- {
- this.file = file;
- this.count = (title ? TITLE_OCCUR : 1);
- }
- }
- } //}}}
- //{{{ HelpFile class
- static class HelpFile
- {
- String file;
- String title;
- HelpFile(String file)
- {
- this.file = file;
- }
- public String toString()
- {
- return title;
- }
- public boolean equals(Object o)
- {
- if(o instanceof HelpFile)
- return ((HelpFile)o).file.equals(file);
- else
- return false;
- }
- } //}}}
- }