findnextaction.java

具有不同语法高亮的编辑器实例

/*
 * 11/14/2003
 *
 * FindNextAction.java - Action to search for text again in RText.
 */
package org.fife.rtext;

import java.awt.event.ActionEvent;
import java.util.ResourceBundle;
import javax.swing.AbstractAction;
import javax.swing.ImageIcon;
import javax.swing.JOptionPane;
import javax.swing.KeyStroke;

import org.fife.ui.search.FindDialog;
import org.fife.ui.search.ReplaceDialog;

/**
 * Action used by an <code>AbstractMainView</code> to search for text.
 *
 * @author Robert Futrell
 * @version 1.0
 */
class FindNextAction
    extends AbstractAction {

  private RText rtext;

      /*****************************************************************************/

  /**
   * Creates a new <code>FindNextAction</code>.
   *
   * @param text The text associated with the action.
   * @param icon The icon associated with the action.
   * @param desc The description of the action (used in tooltips???).
   * @param mnemonic The mnemonic for the action.
   * @param accelerator The accelerator key for the action.
   * @param rtext The <code>RText</code> that owns the
   *              <code>FindDialog</code>.
   */
  public FindNextAction(String text, ImageIcon icon, String desc,
                        Integer mnemonic, KeyStroke accelerator,
                        RText rtext) {
    super(text, icon);
    putValue(ACCELERATOR_KEY, accelerator);
    putValue(SHORT_DESCRIPTION, desc);
    putValue(MNEMONIC_KEY, mnemonic);
    this.rtext = rtext;
  }

      /*****************************************************************************/

  /**
   * Callback routine called when user uses this component.
   *
   * @param e The action event.
   */
  public void actionPerformed(ActionEvent e) {

    AbstractMainView mainView = rtext.getMainView();

    // Allocate find/replace dialogs the first time either is used, so
    // RText's initial startup time isn't as bad.
    if (mainView.findDialog == null) {
      mainView.findDialog = new FindDialog(rtext, mainView);
      mainView.replaceDialog = new ReplaceDialog(rtext, mainView);
      mainView.findDialog.addActionListener(mainView);
      mainView.replaceDialog.addActionListener(mainView);
      mainView.findDialog.addPropertyChangeListener(mainView);
      mainView.replaceDialog.addPropertyChangeListener(mainView);
    }

    // Do this just once for performance.
    FindDialog findDialog = mainView.findDialog;

    // If the current text string is nothing (ie, they haven't searched
    // yet), bring up Find dialog.
    if (mainView.searchStrings.size() == 0 && !findDialog.isVisible() &&
        !mainView.replaceDialog.isVisible()) {
      findDialog.setSearchParameters(mainView.searchStrings,
                                     mainView.searchMatchCase,
                                     mainView.searchWholeWord,
                                     mainView.searchRegExpression,
                                     !mainView.searchingForward,
                                     mainView.searchMarkAll);
      findDialog.setVisible(true);
    }
    // Otherwise, repeat the last Find action.
    else {

      RTextEditorPane textArea = mainView.currentTextArea;
      String searchString = null;

      // Get the text last searched for.
      if (findDialog.isVisible()) {
        mainView.searchStrings = findDialog.getSearchStrings();
        searchString = findDialog.getSearchString();
      }
      else if (mainView.replaceDialog.isVisible()) {
        ReplaceDialog replaceDialog = mainView.replaceDialog;
        mainView.searchStrings = replaceDialog.getSearchStrings();
        searchString = replaceDialog.getSearchString();
      }
      // else, mainView.searchStrings should already have a value (see
      // above), but we still need to give a value to searchString.
      else {
        searchString = (String) mainView.searchStrings.get(0);
      }

      // If "mark all" is selected, first mark all occurences in the
      // text area, then do the "find" (so that the next occurence is
      // indeed selected).
      textArea.clearMarkAllHighlights(); // Always remove old stuff.
      if (mainView.searchMarkAll) {
        textArea.markAll(searchString, mainView.searchMatchCase,
                         mainView.searchWholeWord,
                         mainView.searchRegExpression);
      }

      boolean found = textArea.find(searchString,
                                    mainView.searchingForward,
                                    mainView.searchMatchCase,
                                    mainView.searchWholeWord,
                                    mainView.searchRegExpression);
      if (!found) {
        ResourceBundle msg = rtext.getResourceBundle();
        // Double-up backslashes or String.replaceFirst() will get
        // rid of 'em...
        String escapedSearchString = RTextUtilities.
            getRegularExpressionForLine(searchString, true);
        String temp = msg.getString("CannotFindString").
            replaceFirst("%text%", escapedSearchString);
        JOptionPane.showMessageDialog(null, temp,
                                      msg.getString("InfoDialogHeader"),
                                      JOptionPane.INFORMATION_MESSAGE);
      }

      // If find and replace dialogs aren't up, give text area focus.
      if (!findDialog.isVisible() &&
          !mainView.replaceDialog.isVisible()) {
        textArea.requestFocusInWindow();

      }
    }

  }

      /*****************************************************************************/

}