org.fife.rsta.ac.GoToMemberAction Maven / Gradle / Ivy
/*
* 11/15/2011
*
* Copyright (C) 2010 Robert Futrell
* robert_futrell at users.sourceforge.net
* http://fifesoft.com/rsyntaxtextarea
*
* This library is distributed under a modified BSD license. See the included
* LICENSE.md file for details.
*/
package org.fife.rsta.ac;
import java.awt.Dimension;
import java.awt.Point;
import java.awt.Rectangle;
import java.awt.Window;
import java.awt.event.ActionEvent;
import javax.swing.SwingUtilities;
import javax.swing.UIManager;
import javax.swing.text.JTextComponent;
import javax.swing.text.TextAction;
import org.fife.ui.rsyntaxtextarea.RSyntaxTextArea;
/**
* Displays a popup dialog with the "Go to member" tree. Language support
* implementations that can do in-depth parsing of the source code in an editor
* can create an {@link AbstractSourceTree} representing that source, and add
* this action to RSyntaxTextArea's input/action maps, so users
* can easily navigate to functions, methods, etc.
*
* The preferred keystroke to bind this action to is Ctrl+Shift+O
* (Cmd+Shift+O on Mac). Language supports should also be sure to uninstall
* this shortcut when they are uninstalled themselves.
*
* @author Robert Futrell
* @version 1.0
* @see GoToMemberWindow
*/
public class GoToMemberAction extends TextAction {
/**
* The outline tree class appropriate for the current language.
*/
private Class outlineTreeClass;
/**
* Constructor.
*
* @param outlineTreeClass A class extending {@link AbstractSourceTree}.
* This class must have a no-argument constructor.
*/
public GoToMemberAction(Class outlineTreeClass) {
super("GoToType");
this.outlineTreeClass = outlineTreeClass;
}
@Override
public void actionPerformed(ActionEvent e) {
AbstractSourceTree tree = createTree();
if (tree==null) {
UIManager.getLookAndFeel().provideErrorFeedback(null);
return;
}
JTextComponent tc = getTextComponent(e);
if (tc instanceof RSyntaxTextArea) {
RSyntaxTextArea textArea = (RSyntaxTextArea)tc;
Window parent = SwingUtilities.getWindowAncestor(textArea);
GoToMemberWindow gtmw = new GoToMemberWindow(parent, textArea, tree);
setLocationBasedOn(gtmw, textArea);
gtmw.setVisible(true);
}
else {
UIManager.getLookAndFeel().provideErrorFeedback(null);
}
}
/**
* Creates the outline tree.
*
* @return An instance of the outline tree.
*/
private AbstractSourceTree createTree() {
AbstractSourceTree tree = null;
try {
tree = (AbstractSourceTree)outlineTreeClass.newInstance();
tree.setSorted(true);
} catch (RuntimeException re) { // FindBugs
throw re;
} catch (Exception e) {
e.printStackTrace();
}
return tree;
}
/**
* Centers the window in the text area.
*
* @param gtmw The window to center.
* @param textArea The parent text area to center it in.
*/
private void setLocationBasedOn(GoToMemberWindow gtmw,
RSyntaxTextArea textArea) {
Rectangle visibleRect = textArea.getVisibleRect();
Dimension gtmwPS = gtmw.getPreferredSize();
int x = visibleRect.x + (visibleRect.width-gtmwPS.width)/2;
int y = visibleRect.y + (visibleRect.height-gtmwPS.height)/2;
Point p = new Point(x, y);
SwingUtilities.convertPointToScreen(p, textArea);
gtmw.setLocation(p);
}
}