searchandreplace.java

用java 编写的源码开放的文本编辑器。有很多有用的特性

/*
 * SearchAndReplace.java - Search and replace
 * :tabSize=8:indentSize=8:noTabs=false:
 * :folding=explicit:collapseFolds=1:
 *
 * Copyright (C) 1999, 2000, 2001, 2002 Slava Pestov
 * Portions copyright (C) 2001 Tom Locke
 *
 * 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.search;

//{{{ Imports
import bsh.BshMethod;
import java.awt.Component;
import javax.swing.JOptionPane;
import javax.swing.text.Segment;
import org.gjt.sp.jedit.*;
import org.gjt.sp.jedit.io.VFSManager;
import org.gjt.sp.jedit.msg.SearchSettingsChanged;
import org.gjt.sp.jedit.textarea.*;
import org.gjt.sp.util.Log;
//}}}

/**
 * Class that implements regular expression and literal search within
 * jEdit buffers.<p>
 *
 * There are two main groups of methods in this class:
 * <ul>
 * <li>Property accessors - for changing search and replace settings.</li>
 * <li>Actions - for performing search and replace.</li>
 * </ul>
 *
 * The "HyperSearch" and "Keep dialog" features, as reflected in
 * checkbox options in the search dialog, are not handled from within
 * this class. If you wish to have these options set before the search dialog
 * appears, make a prior call to either or both of the following:
 *
 * <pre> jEdit.setBooleanProperty("search.hypersearch.toggle",true);
 * jEdit.setBooleanProperty("search.keepDialog.toggle",true);</pre>
 *
 * If you are not using the dialog to undertake a search or replace, you may
 * call any of the search and replace methods (including
 * {@link #hyperSearch(View)}) without concern for the value of these properties.
 *
 * @author Slava Pestov
 * @author John Gellene (API documentation)
 * @version $Id: SearchAndReplace.java,v 1.43 2003/02/09 05:16:57 spestov Exp $
 */
public class SearchAndReplace
{
	//{{{ Getters and setters

	//{{{ setSearchString() method
	/**
	 * Sets the current search string.
	 * @param search The new search string
	 */
	public static void setSearchString(String search)
	{
		if(search.equals(SearchAndReplace.search))
			return;

		SearchAndReplace.search = search;
		matcher = null;

		EditBus.send(new SearchSettingsChanged(null));
	} //}}}

	//{{{ getSearchString() method
	/**
	 * Returns the current search string.
	 */
	public static String getSearchString()
	{
		return search;
	} //}}}

	//{{{ setReplaceString() method
	/**
	 * Sets the current replacement string.
	 * @param search The new replacement string
	 */
	public static void setReplaceString(String replace)
	{
		if(replace.equals(SearchAndReplace.replace))
			return;

		SearchAndReplace.replace = replace;
		matcher = null;

		EditBus.send(new SearchSettingsChanged(null));
	} //}}}

	//{{{ getReplaceString() method
	/**
	 * Returns the current replacement string.
	 */
	public static String getReplaceString()
	{
		return replace;
	} //}}}

	//{{{ setIgnoreCase() method
	/**
	 * Sets the ignore case flag.
	 * @param ignoreCase True if searches should be case insensitive,
	 * false otherwise
	 */
	public static void setIgnoreCase(boolean ignoreCase)
	{
		if(ignoreCase == SearchAndReplace.ignoreCase)
			return;

		SearchAndReplace.ignoreCase = ignoreCase;
		matcher = null;

		EditBus.send(new SearchSettingsChanged(null));
	} //}}}

	//{{{ getIgnoreCase() method
	/**
	 * Returns the state of the ignore case flag.
	 * @return True if searches should be case insensitive,
	 * false otherwise
	 */
	public static boolean getIgnoreCase()
	{
		return ignoreCase;
	} //}}}

	//{{{ setRegexp() method
	/**
	 * Sets the state of the regular expression flag.
	 * @param regexp True if regular expression searches should be
	 * performed
	 */
	public static void setRegexp(boolean regexp)
	{
		if(regexp == SearchAndReplace.regexp)
			return;

		SearchAndReplace.regexp = regexp;
		if(regexp && reverse)
			reverse = false;

		matcher = null;

		EditBus.send(new SearchSettingsChanged(null));
	} //}}}

	//{{{ getRegexp() method
	/**
	 * Returns the state of the regular expression flag.
	 * @return True if regular expression searches should be performed
	 */
	public static boolean getRegexp()
	{
		return regexp;
	} //}}}

	//{{{ setReverseSearch() method
	/**
	 * Determines whether a reverse search will conducted from the current
	 * position to the beginning of a buffer. Note that reverse search and
	 * regular expression search is mutually exclusive; enabling one will
	 * disable the other.
	 * @param reverse True if searches should go backwards,
	 * false otherwise
	 */
	public static void setReverseSearch(boolean reverse)
	{
		if(reverse == SearchAndReplace.reverse)
			return;

		SearchAndReplace.reverse = (regexp ? false : reverse);

		matcher = null;

		EditBus.send(new SearchSettingsChanged(null));
	} //}}}

	//{{{ getReverseSearch() method
	/**
	 * Returns the state of the reverse search flag.
	 * @return True if searches should go backwards,
	 * false otherwise
	 */
	public static boolean getReverseSearch()
	{
		return reverse;
	} //}}}

	//{{{ setBeanShellReplace() method
	/**
	 * Sets the state of the BeanShell replace flag.
	 * @param regexp True if the replace string is a BeanShell expression
	 * @since jEdit 3.2pre2
	 */
	public static void setBeanShellReplace(boolean beanshell)
	{
		if(beanshell == SearchAndReplace.beanshell)
			return;

		SearchAndReplace.beanshell = beanshell;
		matcher = null;

		EditBus.send(new SearchSettingsChanged(null));
	} //}}}

	//{{{ getBeanShellReplace() method
	/**
	 * Returns the state of the BeanShell replace flag.
	 * @return True if the replace string is a BeanShell expression
	 * @since jEdit 3.2pre2
	 */
	public static boolean getBeanShellReplace()
	{
		return beanshell;
	} //}}}

	//{{{ setAutoWrap() method
	/**
	 * Sets the state of the auto wrap around flag.
	 * @param wrap If true, the 'continue search from start' dialog
	 * will not be displayed
	 * @since jEdit 3.2pre2
	 */
	public static void setAutoWrapAround(boolean wrap)
	{
		if(wrap == SearchAndReplace.wrap)
			return;

		SearchAndReplace.wrap = wrap;

		EditBus.send(new SearchSettingsChanged(null));
	} //}}}

	//{{{ getAutoWrap() method
	/**
	 * Returns the state of the auto wrap around flag.
	 * @param wrap If true, the 'continue search from start' dialog
	 * will not be displayed
	 * @since jEdit 3.2pre2
	 */
	public static boolean getAutoWrapAround()
	{
		return wrap;
	} //}}}

	//{{{ setSearchMatcher() method
	/**
	 * Sets a custom search string matcher. Note that calling
	 * {@link #setSearchString(String)}, {@link #setReplaceString(String)},
	 * {@link #setIgnoreCase(boolean)}, {@link #setRegexp(boolean)},
	 * {@link #setReverseSearch(boolean)} or
	 * {@link #setBeanShellReplace(boolean)} will reset the matcher to the
	 * default.
	 */
	public static void setSearchMatcher(SearchMatcher matcher)
	{
		SearchAndReplace.matcher = matcher;

		EditBus.send(new SearchSettingsChanged(null));
	} //}}}

	//{{{ getSearchMatcher() method
	/**
	 * Returns the current search string matcher.
	 * @param reverseOK Replacement commands need a non-reversed matcher,
	 * so they set this to false
	 * @exception IllegalArgumentException if regular expression search
	 * is enabled, the search string or replacement string is invalid
	 * @since jEdit 4.1pre7
	 */
	public static SearchMatcher getSearchMatcher()
		throws Exception
	{
		if(matcher != null)
			return matcher;

		if(search == null || "".equals(search))
			return null;

		// replace must not be null
		String replace = (SearchAndReplace.replace == null ? "" : SearchAndReplace.replace);

		BshMethod replaceMethod;
		if(beanshell && replace.length() != 0)
		{
			replaceMethod = BeanShell.cacheBlock("replace","return ("
				+ replace + ");",true);
		}
		else
			replaceMethod = null;

		if(regexp)
			matcher = new RESearchMatcher(search,replace,ignoreCase,
				beanshell,replaceMethod);
		else
		{
			matcher = new BoyerMooreSearchMatcher(search,replace,
				ignoreCase,beanshell,replaceMethod);
		}

		return matcher;
	} //}}}

	//{{{ setSearchFileSet() method
	/**
	 * Sets the current search file set.
	 * @param fileset The file set to perform searches in
	 * @see AllBufferSet
	 * @see CurrentBufferSet
	 * @see DirectoryListSet
	 */
	public static void setSearchFileSet(SearchFileSet fileset)
	{
		SearchAndReplace.fileset = fileset;

		EditBus.send(new SearchSettingsChanged(null));
	} //}}}

	//{{{ getSearchFileSet() method
	/**
	 * Returns the current search file set.
	 */
	public static SearchFileSet getSearchFileSet()
	{
		return fileset;
	} //}}}

	//}}}

	//{{{ Actions

	//{{{ hyperSearch() method
	/**
	 * Performs a HyperSearch.
	 * @param view The view
	 * @since jEdit 2.7pre3
	 */
	public static boolean hyperSearch(View view)
	{
		return hyperSearch(view,false);
	} //}}}

	//{{{ hyperSearch() method
	/**
	 * Performs a HyperSearch.
	 * @param view The view
	 * @param selection If true, will only search in the current selection.
	 * Note that the file set must be the current buffer file set for this
	 * to work.
	 * @since jEdit 4.0pre1
	 */
	public static boolean hyperSearch(View view, boolean selection)
	{
		// component that will parent any dialog boxes
		Component comp = SearchDialog.getSearchDialog(view);
		if(comp == null)
			comp = view;

		record(view,"hyperSearch(view," + selection + ")",false,
			!selection);

		view.getDockableWindowManager().addDockableWindow(
			HyperSearchResults.NAME);
		final HyperSearchResults results = (HyperSearchResults)
			view.getDockableWindowManager()
			.getDockable(HyperSearchResults.NAME);
		results.searchStarted();

		try
		{
			SearchMatcher matcher = getSearchMatcher();
			if(matcher == null)
			{
				view.getToolkit().beep();
				results.searchFailed();
				return false;
			}

			Selection[] s;
			if(selection)
			{
				s = view.getTextArea().getSelection();
				if(s == null)
				{
					results.searchFailed();
					return false;
				}
			}
			else
				s = null;
			VFSManager.runInWorkThread(new HyperSearchRequest(view,
				matcher,results,s));
			return true;
		}
		catch(Exception e)
		{
			results.searchFailed();
			Log.log(Log.ERROR,SearchAndReplace.class,e);
			Object[] args = { e.getMessage() };
			if(args[0] == null)
				args[0] = e.toString();
			GUIUtilities.error(comp,"searcherror",args);
			return false;
		}
	} //}}}

	//{{{ find() method
	/**
	 * Finds the next occurance of the search string.
	 * @param view The view
	 * @return True if the operation was successful, false otherwise
	 */
	public static boolean find(View view)
	{
		// component that will parent any dialog boxes
		Component comp = SearchDialog.getSearchDialog(view);
		if(comp == null)
			comp = view;

		boolean repeat = false;
		String path = fileset.getNextFile(view,null);
		if(path == null)
		{
			GUIUtilities.error(comp,"empty-fileset",null);
			return false;
		}

		try
		{
			SearchMatcher matcher = getSearchMatcher();
			if(matcher == null)
			{
				view.getToolkit().beep();
				return false;
			}

			record(view,"find(view)",false,true);

			view.showWaitCursor();

			boolean _reverse = reverse && fileset instanceof CurrentBufferSet;

loop:			for(;;)
			{
				while(path != null)
				{
					Buffer buffer = jEdit.openTemporary(
						view,null,path,false);

					/* this is stupid and misleading.
					 * but 'path' is not used anywhere except
					 * the above line, and if this is done
					 * after the 'continue', then we will
					 * either hang, or be forced to duplicate
					 * it inside the buffer == null, or add
					 * a 'finally' clause. you decide which one's
					 * worse. */
					path = fileset.getNextFile(view,path);

					if(buffer == null)
						continue loop;

					// Wait for the buffer to load
					if(!buffer.isLoaded())
						VFSManager.waitForRequests();

					int start;

					if(view.getBuffer() == buffer && !repeat)
					{
						JEditTextArea textArea = view.getTextArea();
						Selection s = textArea.getSelectionAtOffset(
							textArea.getCaretPosition());
						if(s == null)
							start = textArea.getCaretPosition();
						else if(_reverse)
							start = s.getStart();
						else
							start = s.getEnd();
					}
					else if(_reverse)
						start = buffer.getLength();
					else
						start = 0;

					if(find(view,buffer,start,repeat,_reverse))
						return true;
				}

				if(repeat)
				{
					if(!BeanShell.isScriptRunning())
					{
						view.getStatus().setMessageAndClear(
							jEdit.getProperty("view.status.search-not-found"));

						view.getToolkit().beep();
					}
					return false;
				}

				boolean restart;

				if(BeanShell.isScriptRunning())
				{
					restart = true;
				}
				else if(wrap)
				{
					view.getStatus().setMessageAndClear(
						jEdit.getProperty("view.status.auto-wrap"));
					// beep if beep property set
					if(jEdit.getBooleanProperty("search.beepOnSearchAutoWrap"))
					{
						view.getToolkit().beep();
					}
					restart = true;
				}
				else
				{
					Integer[] args = { new Integer(_reverse ? 1 : 0) };
					int result = GUIUtilities.confirm(comp,
						"keepsearching",args,
						JOptionPane.YES_NO_OPTION,
						JOptionPane.QUESTION_MESSAGE);
					restart = (result == JOptionPane.YES_OPTION);
				}

				if(restart)
				{
					// start search from beginning
					path = fileset.getFirstFile(view);