svn-gvsig-desktop / tags / v1_0_2_Build_909 / libraries / libIverUtiles / src / com / iver / utiles / console / jedit / JEditTextArea.java @ 11150
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package com.iver.utiles.console.jedit; |
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/*
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* JEditTextArea.java - jEdit's text component
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* Copyright (C) 1999 Slava Pestov
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*
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* You may use and modify this package for any purpose. Redistribution is
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* permitted, in both source and binary form, provided that this notice
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* remains intact in all source distributions of this package.
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*/
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import java.awt.AWTEvent; |
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import java.awt.Component; |
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import java.awt.Container; |
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import java.awt.Dimension; |
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import java.awt.Font; |
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import java.awt.FontMetrics; |
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import java.awt.Insets; |
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import java.awt.LayoutManager; |
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import java.awt.Toolkit; |
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import java.awt.datatransfer.Clipboard; |
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import java.awt.datatransfer.DataFlavor; |
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import java.awt.datatransfer.StringSelection; |
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import java.awt.event.ActionEvent; |
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import java.awt.event.ActionListener; |
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import java.awt.event.AdjustmentEvent; |
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import java.awt.event.AdjustmentListener; |
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import java.awt.event.ComponentAdapter; |
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import java.awt.event.ComponentEvent; |
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import java.awt.event.FocusEvent; |
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import java.awt.event.FocusListener; |
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import java.awt.event.InputEvent; |
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import java.awt.event.KeyEvent; |
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import java.awt.event.MouseAdapter; |
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import java.awt.event.MouseEvent; |
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import java.awt.event.MouseMotionListener; |
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import java.util.Enumeration; |
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import java.util.Vector; |
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import javax.swing.JComponent; |
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import javax.swing.JPopupMenu; |
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import javax.swing.JScrollBar; |
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import javax.swing.SwingUtilities; |
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import javax.swing.Timer; |
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import javax.swing.event.CaretEvent; |
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import javax.swing.event.CaretListener; |
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import javax.swing.event.DocumentEvent; |
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import javax.swing.event.DocumentListener; |
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import javax.swing.event.EventListenerList; |
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import javax.swing.text.BadLocationException; |
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import javax.swing.text.Document; |
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import javax.swing.text.Element; |
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import javax.swing.text.Segment; |
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import javax.swing.text.Utilities; |
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import javax.swing.undo.AbstractUndoableEdit; |
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import javax.swing.undo.CannotRedoException; |
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import javax.swing.undo.CannotUndoException; |
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import javax.swing.undo.UndoableEdit; |
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/**
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* jEdit's text area component. It is more suited for editing program
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* source code than JEditorPane, because it drops the unnecessary features
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* (images, variable-width lines, and so on) and adds a whole bunch of
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* useful goodies such as:
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* <ul>
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* <li>More flexible key binding scheme
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* <li>Supports macro recorders
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* <li>Rectangular selection
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* <li>Bracket highlighting
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* <li>Syntax highlighting
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* <li>Command repetition
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* <li>Block caret can be enabled
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* </ul>
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* It is also faster and doesn't have as many problems. It can be used
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* in other applications; the only other part of jEdit it depends on is
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* the syntax package.<p>
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*
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* To use it in your app, treat it like any other component, for example:
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* <pre>JEditTextArea ta = new JEditTextArea();
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* ta.setTokenMarker(new JavaTokenMarker());
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* ta.setText("public class Test {\n"
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* + " public static void main(String[] args) {\n"
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* + " System.out.println(\"Hello World\");\n"
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* + " }\n"
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* + "}");</pre>
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*
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* @author Slava Pestov
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* @version $Id$
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*/
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public class JEditTextArea extends JComponent |
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{ |
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/**
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* Adding components with this name to the text area will place
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* them left of the horizontal scroll bar. In jEdit, the status
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* bar is added this way.
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*/
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public static String LEFT_OF_SCROLLBAR = "los"; |
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/**
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* Creates a new JEditTextArea with the default settings.
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*/
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public JEditTextArea()
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{ |
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this(TextAreaDefaults.getDefaults());
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} |
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/**
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* Creates a new JEditTextArea with the specified settings.
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* @param defaults The default settings
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*/
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public JEditTextArea(TextAreaDefaults defaults)
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{ |
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// Enable the necessary events
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enableEvents(AWTEvent.KEY_EVENT_MASK);
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// Initialize some misc. stuff
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painter = new TextAreaPainter(this,defaults); |
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documentHandler = new DocumentHandler();
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listenerList = new EventListenerList(); |
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caretEvent = new MutableCaretEvent();
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lineSegment = new Segment(); |
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bracketLine = bracketPosition = -1;
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blink = true;
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// Initialize the GUI
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setLayout(new ScrollLayout());
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add(CENTER,painter); |
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add(RIGHT,vertical = new JScrollBar(JScrollBar.VERTICAL)); |
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add(BOTTOM,horizontal = new JScrollBar(JScrollBar.HORIZONTAL)); |
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// Add some event listeners
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vertical.addAdjustmentListener(new AdjustHandler());
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horizontal.addAdjustmentListener(new AdjustHandler());
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painter.addComponentListener(new ComponentHandler());
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painter.addMouseListener(new MouseHandler());
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painter.addMouseMotionListener(new DragHandler());
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addFocusListener(new FocusHandler());
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// Load the defaults
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setInputHandler(defaults.inputHandler); |
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setDocument(defaults.document); |
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editable = defaults.editable; |
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caretVisible = defaults.caretVisible; |
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caretBlinks = defaults.caretBlinks; |
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electricScroll = defaults.electricScroll; |
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popup = defaults.popup; |
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// We don't seem to get the initial focus event?
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focusedComponent = this;
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} |
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/**
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* Returns if this component can be traversed by pressing
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* the Tab key. This returns false.
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*/
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public final boolean isManagingFocus() |
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{ |
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return true; |
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} |
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/**
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* Returns the object responsible for painting this text area.
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*/
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public final TextAreaPainter getPainter() |
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{ |
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return painter;
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} |
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/**
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* Returns the input handler.
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*/
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public final InputHandler getInputHandler() |
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{ |
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return inputHandler;
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} |
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/**
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* Sets the input handler.
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* @param inputHandler The new input handler
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*/
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public void setInputHandler(InputHandler inputHandler) |
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{ |
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this.inputHandler = inputHandler;
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} |
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/**
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* Returns true if the caret is blinking, false otherwise.
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*/
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public final boolean isCaretBlinkEnabled() |
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{ |
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return caretBlinks;
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} |
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/**
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* Toggles caret blinking.
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* @param caretBlinks True if the caret should blink, false otherwise
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*/
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public void setCaretBlinkEnabled(boolean caretBlinks) |
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{ |
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this.caretBlinks = caretBlinks;
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if(!caretBlinks)
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blink = false;
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painter.invalidateSelectedLines(); |
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} |
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/**
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* Returns true if the caret is visible, false otherwise.
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*/
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public final boolean isCaretVisible() |
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{ |
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return (!caretBlinks || blink) && caretVisible;
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} |
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/**
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* Sets if the caret should be visible.
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* @param caretVisible True if the caret should be visible, false
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* otherwise
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*/
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public void setCaretVisible(boolean caretVisible) |
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{ |
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this.caretVisible = caretVisible;
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blink = true;
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painter.invalidateSelectedLines(); |
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} |
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/**
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* Blinks the caret.
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*/
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public final void blinkCaret() |
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{ |
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if(caretBlinks)
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{ |
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blink = !blink; |
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painter.invalidateSelectedLines(); |
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} |
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else
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blink = true;
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} |
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/**
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* Returns the number of lines from the top and button of the
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* text area that are always visible.
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*/
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public final int getElectricScroll() |
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{ |
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return electricScroll;
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} |
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/**
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* Sets the number of lines from the top and bottom of the text
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* area that are always visible
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* @param electricScroll The number of lines always visible from
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* the top or bottom
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*/
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public final void setElectricScroll(int electricScroll) |
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{ |
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this.electricScroll = electricScroll;
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} |
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/**
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* Updates the state of the scroll bars. This should be called
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* if the number of lines in the document changes, or when the
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* size of the text are changes.
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*/
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public void updateScrollBars() |
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{ |
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if(vertical != null && visibleLines != 0) |
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{ |
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vertical.setValues(firstLine,visibleLines,0,getLineCount());
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vertical.setUnitIncrement(2);
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vertical.setBlockIncrement(visibleLines); |
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} |
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int width = painter.getWidth();
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if(horizontal != null && width != 0) |
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{ |
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horizontal.setValues(-horizontalOffset,width,0,width * 5); |
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horizontal.setUnitIncrement(painter.getFontMetrics() |
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.charWidth('w'));
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horizontal.setBlockIncrement(width / 2);
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} |
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} |
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/**
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* Returns the line displayed at the text area's origin.
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*/
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public final int getFirstLine() |
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{ |
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return firstLine;
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} |
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/**
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* Sets the line displayed at the text area's origin without
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* updating the scroll bars.
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*/
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public void setFirstLine(int firstLine) |
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{ |
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if(firstLine == this.firstLine) |
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return;
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int oldFirstLine = this.firstLine; |
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this.firstLine = firstLine;
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if(firstLine != vertical.getValue())
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updateScrollBars(); |
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painter.repaint(); |
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} |
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/**
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* Returns the number of lines visible in this text area.
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*/
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public final int getVisibleLines() |
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{ |
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return visibleLines;
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} |
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/**
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* Recalculates the number of visible lines. This should not
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* be called directly.
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*/
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public final void recalculateVisibleLines() |
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{ |
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if(painter == null) |
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return;
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int height = painter.getHeight();
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int lineHeight = painter.getFontMetrics().getHeight();
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int oldVisibleLines = visibleLines;
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visibleLines = height / lineHeight; |
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updateScrollBars(); |
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} |
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/**
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* Returns the horizontal offset of drawn lines.
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*/
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public final int getHorizontalOffset() |
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{ |
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return horizontalOffset;
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} |
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/**
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* Sets the horizontal offset of drawn lines. This can be used to
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* implement horizontal scrolling.
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* @param horizontalOffset offset The new horizontal offset
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*/
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public void setHorizontalOffset(int horizontalOffset) |
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{ |
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if(horizontalOffset == this.horizontalOffset) |
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return;
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this.horizontalOffset = horizontalOffset;
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if(horizontalOffset != horizontal.getValue())
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updateScrollBars(); |
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painter.repaint(); |
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} |
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/**
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* A fast way of changing both the first line and horizontal
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* offset.
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* @param firstLine The new first line
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* @param horizontalOffset The new horizontal offset
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* @return True if any of the values were changed, false otherwise
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*/
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public boolean setOrigin(int firstLine, int horizontalOffset) |
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{ |
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boolean changed = false; |
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int oldFirstLine = this.firstLine; |
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if(horizontalOffset != this.horizontalOffset) |
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{ |
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this.horizontalOffset = horizontalOffset;
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changed = true;
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} |
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if(firstLine != this.firstLine) |
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{ |
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this.firstLine = firstLine;
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changed = true;
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} |
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if(changed)
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{ |
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updateScrollBars(); |
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painter.repaint(); |
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} |
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return changed;
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} |
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/**
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* Ensures that the caret is visible by scrolling the text area if
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* necessary.
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* @return True if scrolling was actually performed, false if the
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* caret was already visible
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*/
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public boolean scrollToCaret() |
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{ |
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int line = getCaretLine();
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int lineStart = getLineStartOffset(line);
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int offset = Math.max(0,Math.min(getLineLength(line) - 1, |
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getCaretPosition() - lineStart)); |
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return scrollTo(line,offset);
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} |
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/**
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* Ensures that the specified line and offset is visible by scrolling
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* the text area if necessary.
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* @param line The line to scroll to
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* @param offset The offset in the line to scroll to
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* @return True if scrolling was actually performed, false if the
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* line and offset was already visible
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*/
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public boolean scrollTo(int line, int offset) |
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{ |
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// visibleLines == 0 before the component is realized
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// we can't do any proper scrolling then, so we have
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// this hack...
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if(visibleLines == 0) |
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{ |
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setFirstLine(Math.max(0,line - electricScroll)); |
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return true; |
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} |
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int newFirstLine = firstLine;
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int newHorizontalOffset = horizontalOffset;
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if(line < firstLine + electricScroll)
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{ |
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newFirstLine = Math.max(0,line - electricScroll); |
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} |
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else if(line + electricScroll >= firstLine + visibleLines) |
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{ |
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newFirstLine = (line - visibleLines) + electricScroll + 1;
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if(newFirstLine + visibleLines >= getLineCount())
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newFirstLine = getLineCount() - visibleLines; |
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if(newFirstLine < 0) |
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newFirstLine = 0;
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} |
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int x = _offsetToX(line,offset);
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int width = painter.getFontMetrics().charWidth('w'); |
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if(x < 0) |
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{ |
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newHorizontalOffset = Math.min(0,horizontalOffset |
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- x + width + 5);
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} |
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else if(x + width >= painter.getWidth()) |
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{ |
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newHorizontalOffset = horizontalOffset + |
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(painter.getWidth() - x) - width - 5;
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} |
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return setOrigin(newFirstLine,newHorizontalOffset);
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} |
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/**
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* Converts a line index to a y co-ordinate.
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* @param line The line
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*/
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public int lineToY(int line) |
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{ |
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FontMetrics fm = painter.getFontMetrics();
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return (line - firstLine) * fm.getHeight()
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- (fm.getLeading() + fm.getMaxDescent()); |
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} |
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/**
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* Converts a y co-ordinate to a line index.
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* @param y The y co-ordinate
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*/
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public int yToLine(int y) |
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{ |
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FontMetrics fm = painter.getFontMetrics();
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int height = fm.getHeight();
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return Math.max(0,Math.min(getLineCount() - 1, |
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y / height + firstLine)); |
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} |
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|
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/**
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* Converts an offset in a line into an x co-ordinate. This is a
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* slow version that can be used any time.
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* @param line The line
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* @param offset The offset, from the start of the line
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*/
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public final int offsetToX(int line, int offset) |
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{ |
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// don't use cached tokens
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painter.currentLineTokens = null;
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return _offsetToX(line,offset);
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} |
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/**
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* Converts an offset in a line into an x co-ordinate. This is a
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* fast version that should only be used if no changes were made
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* to the text since the last repaint.
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* @param line The line
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* @param offset The offset, from the start of the line
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*/
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public int _offsetToX(int line, int offset) |
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{ |
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TokenMarker tokenMarker = getTokenMarker(); |
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/* Use painter's cached info for speed */
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FontMetrics fm = painter.getFontMetrics();
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getLineText(line,lineSegment); |
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int segmentOffset = lineSegment.offset;
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int x = horizontalOffset;
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/* If syntax coloring is disabled, do simple translation */
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if(tokenMarker == null) |
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{ |
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lineSegment.count = offset; |
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return x + Utilities.getTabbedTextWidth(lineSegment, |
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fm,x,painter,0);
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} |
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/* If syntax coloring is enabled, we have to do this because
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* tokens can vary in width */
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else
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{ |
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Token tokens; |
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if(painter.currentLineIndex == line
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&& painter.currentLineTokens != null)
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tokens = painter.currentLineTokens; |
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else
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{ |
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painter.currentLineIndex = line; |
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tokens = painter.currentLineTokens |
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= tokenMarker.markTokens(lineSegment,line); |
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} |
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Toolkit toolkit = painter.getToolkit();
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Font defaultFont = painter.getFont();
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SyntaxStyle[] styles = painter.getStyles();
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for(;;)
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{ |
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byte id = tokens.id;
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if(id == Token.END)
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{ |
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return x;
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} |
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if(id == Token.NULL)
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fm = painter.getFontMetrics(); |
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else
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fm = styles[id].getFontMetrics(defaultFont); |
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int length = tokens.length;
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if(offset + segmentOffset < lineSegment.offset + length)
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{ |
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lineSegment.count = offset - (lineSegment.offset - segmentOffset); |
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return x + Utilities.getTabbedTextWidth( |
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lineSegment,fm,x,painter,0);
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} |
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else
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{ |
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lineSegment.count = length; |
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x += Utilities.getTabbedTextWidth(
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lineSegment,fm,x,painter,0);
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lineSegment.offset += length; |
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} |
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tokens = tokens.next; |
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} |
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} |
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} |
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|
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/**
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* Converts an x co-ordinate to an offset within a line.
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* @param line The line
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* @param x The x co-ordinate
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*/
|
575 |
public int xToOffset(int line, int x) |
576 |
{ |
577 |
TokenMarker tokenMarker = getTokenMarker(); |
578 |
|
579 |
/* Use painter's cached info for speed */
|
580 |
FontMetrics fm = painter.getFontMetrics();
|
581 |
|
582 |
getLineText(line,lineSegment); |
583 |
|
584 |
char[] segmentArray = lineSegment.array; |
585 |
int segmentOffset = lineSegment.offset;
|
586 |
int segmentCount = lineSegment.count;
|
587 |
|
588 |
int width = horizontalOffset;
|
589 |
|
590 |
if(tokenMarker == null) |
591 |
{ |
592 |
for(int i = 0; i < segmentCount; i++) |
593 |
{ |
594 |
char c = segmentArray[i + segmentOffset];
|
595 |
int charWidth;
|
596 |
if(c == '\t') |
597 |
charWidth = (int)painter.nextTabStop(width,i)
|
598 |
- width; |
599 |
else
|
600 |
charWidth = fm.charWidth(c); |
601 |
|
602 |
if(painter.isBlockCaretEnabled())
|
603 |
{ |
604 |
if(x - charWidth <= width)
|
605 |
return i;
|
606 |
} |
607 |
else
|
608 |
{ |
609 |
if(x - charWidth / 2 <= width) |
610 |
return i;
|
611 |
} |
612 |
|
613 |
width += charWidth; |
614 |
} |
615 |
|
616 |
return segmentCount;
|
617 |
} |
618 |
else
|
619 |
{ |
620 |
Token tokens; |
621 |
if(painter.currentLineIndex == line && painter
|
622 |
.currentLineTokens != null)
|
623 |
tokens = painter.currentLineTokens; |
624 |
else
|
625 |
{ |
626 |
painter.currentLineIndex = line; |
627 |
tokens = painter.currentLineTokens |
628 |
= tokenMarker.markTokens(lineSegment,line); |
629 |
} |
630 |
|
631 |
int offset = 0; |
632 |
Toolkit toolkit = painter.getToolkit();
|
633 |
Font defaultFont = painter.getFont();
|
634 |
SyntaxStyle[] styles = painter.getStyles();
|
635 |
|
636 |
for(;;)
|
637 |
{ |
638 |
byte id = tokens.id;
|
639 |
if(id == Token.END)
|
640 |
return offset;
|
641 |
|
642 |
if(id == Token.NULL)
|
643 |
fm = painter.getFontMetrics(); |
644 |
else
|
645 |
fm = styles[id].getFontMetrics(defaultFont); |
646 |
|
647 |
int length = tokens.length;
|
648 |
|
649 |
for(int i = 0; i < length; i++) |
650 |
{ |
651 |
char c = segmentArray[segmentOffset + offset + i];
|
652 |
int charWidth;
|
653 |
if(c == '\t') |
654 |
charWidth = (int)painter.nextTabStop(width,offset + i)
|
655 |
- width; |
656 |
else
|
657 |
charWidth = fm.charWidth(c); |
658 |
|
659 |
if(painter.isBlockCaretEnabled())
|
660 |
{ |
661 |
if(x - charWidth <= width)
|
662 |
return offset + i;
|
663 |
} |
664 |
else
|
665 |
{ |
666 |
if(x - charWidth / 2 <= width) |
667 |
return offset + i;
|
668 |
} |
669 |
|
670 |
width += charWidth; |
671 |
} |
672 |
|
673 |
offset += length; |
674 |
tokens = tokens.next; |
675 |
} |
676 |
} |
677 |
} |
678 |
|
679 |
/**
|
680 |
* Converts a point to an offset, from the start of the text.
|
681 |
* @param x The x co-ordinate of the point
|
682 |
* @param y The y co-ordinate of the point
|
683 |
*/
|
684 |
public int xyToOffset(int x, int y) |
685 |
{ |
686 |
int line = yToLine(y);
|
687 |
int start = getLineStartOffset(line);
|
688 |
return start + xToOffset(line,x);
|
689 |
} |
690 |
|
691 |
/**
|
692 |
* Returns the document this text area is editing.
|
693 |
*/
|
694 |
public final Document getDocument() |
695 |
{ |
696 |
return document;
|
697 |
} |
698 |
|
699 |
/**
|
700 |
* Sets the document this text area is editing.
|
701 |
* @param document The document
|
702 |
*/
|
703 |
public void setDocument(SyntaxDocument document) |
704 |
{ |
705 |
if(this.document == document) |
706 |
return;
|
707 |
if(this.document != null) |
708 |
this.document.removeDocumentListener(documentHandler);
|
709 |
this.document = document;
|
710 |
|
711 |
document.addDocumentListener(documentHandler); |
712 |
|
713 |
select(0,0); |
714 |
updateScrollBars(); |
715 |
painter.repaint(); |
716 |
} |
717 |
|
718 |
/**
|
719 |
* Returns the document's token marker. Equivalent to calling
|
720 |
* <code>getDocument().getTokenMarker()</code>.
|
721 |
*/
|
722 |
public final TokenMarker getTokenMarker() |
723 |
{ |
724 |
return document.getTokenMarker();
|
725 |
} |
726 |
|
727 |
/**
|
728 |
* Sets the document's token marker. Equivalent to caling
|
729 |
* <code>getDocument().setTokenMarker()</code>.
|
730 |
* @param tokenMarker The token marker
|
731 |
*/
|
732 |
public final void setTokenMarker(TokenMarker tokenMarker) |
733 |
{ |
734 |
document.setTokenMarker(tokenMarker); |
735 |
} |
736 |
|
737 |
/**
|
738 |
* Returns the length of the document. Equivalent to calling
|
739 |
* <code>getDocument().getLength()</code>.
|
740 |
*/
|
741 |
public final int getDocumentLength() |
742 |
{ |
743 |
return document.getLength();
|
744 |
} |
745 |
|
746 |
/**
|
747 |
* Returns the number of lines in the document.
|
748 |
*/
|
749 |
public final int getLineCount() |
750 |
{ |
751 |
return document.getDefaultRootElement().getElementCount();
|
752 |
} |
753 |
|
754 |
/**
|
755 |
* Returns the line containing the specified offset.
|
756 |
* @param offset The offset
|
757 |
*/
|
758 |
public final int getLineOfOffset(int offset) |
759 |
{ |
760 |
return document.getDefaultRootElement().getElementIndex(offset);
|
761 |
} |
762 |
|
763 |
/**
|
764 |
* Returns the start offset of the specified line.
|
765 |
* @param line The line
|
766 |
* @return The start offset of the specified line, or -1 if the line is
|
767 |
* invalid
|
768 |
*/
|
769 |
public int getLineStartOffset(int line) |
770 |
{ |
771 |
Element lineElement = document.getDefaultRootElement()
|
772 |
.getElement(line); |
773 |
if(lineElement == null) |
774 |
return -1; |
775 |
else
|
776 |
return lineElement.getStartOffset();
|
777 |
} |
778 |
|
779 |
/**
|
780 |
* Returns the end offset of the specified line.
|
781 |
* @param line The line
|
782 |
* @return The end offset of the specified line, or -1 if the line is
|
783 |
* invalid.
|
784 |
*/
|
785 |
public int getLineEndOffset(int line) |
786 |
{ |
787 |
Element lineElement = document.getDefaultRootElement()
|
788 |
.getElement(line); |
789 |
if(lineElement == null) |
790 |
return -1; |
791 |
else
|
792 |
return lineElement.getEndOffset();
|
793 |
} |
794 |
|
795 |
/**
|
796 |
* Returns the length of the specified line.
|
797 |
* @param line The line
|
798 |
*/
|
799 |
public int getLineLength(int line) |
800 |
{ |
801 |
Element lineElement = document.getDefaultRootElement()
|
802 |
.getElement(line); |
803 |
if(lineElement == null) |
804 |
return -1; |
805 |
else
|
806 |
return lineElement.getEndOffset()
|
807 |
- lineElement.getStartOffset() - 1;
|
808 |
} |
809 |
|
810 |
/**
|
811 |
* Returns the entire text of this text area.
|
812 |
*/
|
813 |
public String getText() |
814 |
{ |
815 |
try
|
816 |
{ |
817 |
return document.getText(0,document.getLength()); |
818 |
} |
819 |
catch(BadLocationException bl) |
820 |
{ |
821 |
bl.printStackTrace(); |
822 |
return null; |
823 |
} |
824 |
} |
825 |
|
826 |
/**
|
827 |
* Sets the entire text of this text area.
|
828 |
*/
|
829 |
public void setText(String text) |
830 |
{ |
831 |
try
|
832 |
{ |
833 |
document.beginCompoundEdit(); |
834 |
document.remove(0,document.getLength());
|
835 |
document.insertString(0,text,null); |
836 |
} |
837 |
catch(BadLocationException bl) |
838 |
{ |
839 |
bl.printStackTrace(); |
840 |
} |
841 |
finally
|
842 |
{ |
843 |
document.endCompoundEdit(); |
844 |
} |
845 |
} |
846 |
|
847 |
/**
|
848 |
* Returns the specified substring of the document.
|
849 |
* @param start The start offset
|
850 |
* @param len The length of the substring
|
851 |
* @return The substring, or null if the offsets are invalid
|
852 |
*/
|
853 |
public final String getText(int start, int len) |
854 |
{ |
855 |
try
|
856 |
{ |
857 |
return document.getText(start,len);
|
858 |
} |
859 |
catch(BadLocationException bl) |
860 |
{ |
861 |
bl.printStackTrace(); |
862 |
return null; |
863 |
} |
864 |
} |
865 |
|
866 |
/**
|
867 |
* Copies the specified substring of the document into a segment.
|
868 |
* If the offsets are invalid, the segment will contain a null string.
|
869 |
* @param start The start offset
|
870 |
* @param len The length of the substring
|
871 |
* @param segment The segment
|
872 |
*/
|
873 |
public final void getText(int start, int len, Segment segment) |
874 |
{ |
875 |
try
|
876 |
{ |
877 |
document.getText(start,len,segment); |
878 |
} |
879 |
catch(BadLocationException bl) |
880 |
{ |
881 |
bl.printStackTrace(); |
882 |
segment.offset = segment.count = 0;
|
883 |
} |
884 |
} |
885 |
|
886 |
/**
|
887 |
* Returns the text on the specified line.
|
888 |
* @param lineIndex The line
|
889 |
* @return The text, or null if the line is invalid
|
890 |
*/
|
891 |
public final String getLineText(int lineIndex) |
892 |
{ |
893 |
int start = getLineStartOffset(lineIndex);
|
894 |
return getText(start,getLineEndOffset(lineIndex) - start - 1); |
895 |
} |
896 |
|
897 |
/**
|
898 |
* Copies the text on the specified line into a segment. If the line
|
899 |
* is invalid, the segment will contain a null string.
|
900 |
* @param lineIndex The line
|
901 |
*/
|
902 |
public final void getLineText(int lineIndex, Segment segment) |
903 |
{ |
904 |
int start = getLineStartOffset(lineIndex);
|
905 |
getText(start,getLineEndOffset(lineIndex) - start - 1,segment);
|
906 |
} |
907 |
|
908 |
/**
|
909 |
* Returns the selection start offset.
|
910 |
*/
|
911 |
public final int getSelectionStart() |
912 |
{ |
913 |
return selectionStart;
|
914 |
} |
915 |
|
916 |
/**
|
917 |
* Returns the offset where the selection starts on the specified
|
918 |
* line.
|
919 |
*/
|
920 |
public int getSelectionStart(int line) |
921 |
{ |
922 |
if(line == selectionStartLine)
|
923 |
return selectionStart;
|
924 |
else if(rectSelect) |
925 |
{ |
926 |
Element map = document.getDefaultRootElement();
|
927 |
int start = selectionStart - map.getElement(selectionStartLine)
|
928 |
.getStartOffset(); |
929 |
|
930 |
Element lineElement = map.getElement(line);
|
931 |
int lineStart = lineElement.getStartOffset();
|
932 |
int lineEnd = lineElement.getEndOffset() - 1; |
933 |
return Math.min(lineEnd,lineStart + start); |
934 |
} |
935 |
else
|
936 |
return getLineStartOffset(line);
|
937 |
} |
938 |
|
939 |
/**
|
940 |
* Returns the selection start line.
|
941 |
*/
|
942 |
public final int getSelectionStartLine() |
943 |
{ |
944 |
return selectionStartLine;
|
945 |
} |
946 |
|
947 |
/**
|
948 |
* Sets the selection start. The new selection will be the new
|
949 |
* selection start and the old selection end.
|
950 |
* @param selectionStart The selection start
|
951 |
* @see #select(int,int)
|
952 |
*/
|
953 |
public final void setSelectionStart(int selectionStart) |
954 |
{ |
955 |
select(selectionStart,selectionEnd); |
956 |
} |
957 |
|
958 |
/**
|
959 |
* Returns the selection end offset.
|
960 |
*/
|
961 |
public final int getSelectionEnd() |
962 |
{ |
963 |
return selectionEnd;
|
964 |
} |
965 |
|
966 |
/**
|
967 |
* Returns the offset where the selection ends on the specified
|
968 |
* line.
|
969 |
*/
|
970 |
public int getSelectionEnd(int line) |
971 |
{ |
972 |
if(line == selectionEndLine)
|
973 |
return selectionEnd;
|
974 |
else if(rectSelect) |
975 |
{ |
976 |
Element map = document.getDefaultRootElement();
|
977 |
int end = selectionEnd - map.getElement(selectionEndLine)
|
978 |
.getStartOffset(); |
979 |
|
980 |
Element lineElement = map.getElement(line);
|
981 |
int lineStart = lineElement.getStartOffset();
|
982 |
int lineEnd = lineElement.getEndOffset() - 1; |
983 |
return Math.min(lineEnd,lineStart + end); |
984 |
} |
985 |
else
|
986 |
return getLineEndOffset(line) - 1; |
987 |
} |
988 |
|
989 |
/**
|
990 |
* Returns the selection end line.
|
991 |
*/
|
992 |
public final int getSelectionEndLine() |
993 |
{ |
994 |
return selectionEndLine;
|
995 |
} |
996 |
|
997 |
/**
|
998 |
* Sets the selection end. The new selection will be the old
|
999 |
* selection start and the bew selection end.
|
1000 |
* @param selectionEnd The selection end
|
1001 |
* @see #select(int,int)
|
1002 |
*/
|
1003 |
public final void setSelectionEnd(int selectionEnd) |
1004 |
{ |
1005 |
select(selectionStart,selectionEnd); |
1006 |
} |
1007 |
|
1008 |
/**
|
1009 |
* Returns the caret position. This will either be the selection
|
1010 |
* start or the selection end, depending on which direction the
|
1011 |
* selection was made in.
|
1012 |
*/
|
1013 |
public final int getCaretPosition() |
1014 |
{ |
1015 |
return (biasLeft ? selectionStart : selectionEnd);
|
1016 |
} |
1017 |
|
1018 |
/**
|
1019 |
* Returns the caret line.
|
1020 |
*/
|
1021 |
public final int getCaretLine() |
1022 |
{ |
1023 |
return (biasLeft ? selectionStartLine : selectionEndLine);
|
1024 |
} |
1025 |
|
1026 |
/**
|
1027 |
* Returns the mark position. This will be the opposite selection
|
1028 |
* bound to the caret position.
|
1029 |
* @see #getCaretPosition()
|
1030 |
*/
|
1031 |
public final int getMarkPosition() |
1032 |
{ |
1033 |
return (biasLeft ? selectionEnd : selectionStart);
|
1034 |
} |
1035 |
|
1036 |
/**
|
1037 |
* Returns the mark line.
|
1038 |
*/
|
1039 |
public final int getMarkLine() |
1040 |
{ |
1041 |
return (biasLeft ? selectionEndLine : selectionStartLine);
|
1042 |
} |
1043 |
|
1044 |
/**
|
1045 |
* Sets the caret position. The new selection will consist of the
|
1046 |
* caret position only (hence no text will be selected)
|
1047 |
* @param caret The caret position
|
1048 |
* @see #select(int,int)
|
1049 |
*/
|
1050 |
public final void setCaretPosition(int caret) |
1051 |
{ |
1052 |
select(caret,caret); |
1053 |
} |
1054 |
|
1055 |
/**
|
1056 |
* Selects all text in the document.
|
1057 |
*/
|
1058 |
public final void selectAll() |
1059 |
{ |
1060 |
select(0,getDocumentLength());
|
1061 |
} |
1062 |
|
1063 |
/**
|
1064 |
* Moves the mark to the caret position.
|
1065 |
*/
|
1066 |
public final void selectNone() |
1067 |
{ |
1068 |
select(getCaretPosition(),getCaretPosition()); |
1069 |
} |
1070 |
|
1071 |
/**
|
1072 |
* Selects from the start offset to the end offset. This is the
|
1073 |
* general selection method used by all other selecting methods.
|
1074 |
* The caret position will be start if start < end, and end
|
1075 |
* if end > start.
|
1076 |
* @param start The start offset
|
1077 |
* @param end The end offset
|
1078 |
*/
|
1079 |
public void select(int start, int end) |
1080 |
{ |
1081 |
int newStart, newEnd;
|
1082 |
boolean newBias;
|
1083 |
if(start <= end)
|
1084 |
{ |
1085 |
newStart = start; |
1086 |
newEnd = end; |
1087 |
newBias = false;
|
1088 |
} |
1089 |
else
|
1090 |
{ |
1091 |
newStart = end; |
1092 |
newEnd = start; |
1093 |
newBias = true;
|
1094 |
} |
1095 |
|
1096 |
if(newStart < 0 || newEnd > getDocumentLength()) |
1097 |
{ |
1098 |
throw new IllegalArgumentException("Bounds out of" |
1099 |
+ " range: " + newStart + "," + |
1100 |
newEnd); |
1101 |
} |
1102 |
|
1103 |
// If the new position is the same as the old, we don't
|
1104 |
// do all this crap, however we still do the stuff at
|
1105 |
// the end (clearing magic position, scrolling)
|
1106 |
if(newStart != selectionStart || newEnd != selectionEnd
|
1107 |
|| newBias != biasLeft) |
1108 |
{ |
1109 |
int newStartLine = getLineOfOffset(newStart);
|
1110 |
int newEndLine = getLineOfOffset(newEnd);
|
1111 |
|
1112 |
if(painter.isBracketHighlightEnabled())
|
1113 |
{ |
1114 |
if(bracketLine != -1) |
1115 |
painter.invalidateLine(bracketLine); |
1116 |
updateBracketHighlight(end); |
1117 |
if(bracketLine != -1) |
1118 |
painter.invalidateLine(bracketLine); |
1119 |
} |
1120 |
|
1121 |
painter.invalidateLineRange(selectionStartLine,selectionEndLine); |
1122 |
painter.invalidateLineRange(newStartLine,newEndLine); |
1123 |
|
1124 |
document.addUndoableEdit(new CaretUndo(
|
1125 |
selectionStart,selectionEnd)); |
1126 |
|
1127 |
selectionStart = newStart; |
1128 |
selectionEnd = newEnd; |
1129 |
selectionStartLine = newStartLine; |
1130 |
selectionEndLine = newEndLine; |
1131 |
biasLeft = newBias; |
1132 |
|
1133 |
fireCaretEvent(); |
1134 |
} |
1135 |
|
1136 |
// When the user is typing, etc, we don't want the caret
|
1137 |
// to blink
|
1138 |
blink = true;
|
1139 |
caretTimer.restart(); |
1140 |
|
1141 |
// Disable rectangle select if selection start = selection end
|
1142 |
if(selectionStart == selectionEnd)
|
1143 |
rectSelect = false;
|
1144 |
|
1145 |
// Clear the `magic' caret position used by up/down
|
1146 |
magicCaret = -1;
|
1147 |
|
1148 |
scrollToCaret(); |
1149 |
} |
1150 |
|
1151 |
/**
|
1152 |
* Returns the selected text, or null if no selection is active.
|
1153 |
*/
|
1154 |
public final String getSelectedText() |
1155 |
{ |
1156 |
if(selectionStart == selectionEnd)
|
1157 |
return null; |
1158 |
|
1159 |
if(rectSelect)
|
1160 |
{ |
1161 |
// Return each row of the selection on a new line
|
1162 |
|
1163 |
Element map = document.getDefaultRootElement();
|
1164 |
|
1165 |
int start = selectionStart - map.getElement(selectionStartLine)
|
1166 |
.getStartOffset(); |
1167 |
int end = selectionEnd - map.getElement(selectionEndLine)
|
1168 |
.getStartOffset(); |
1169 |
|
1170 |
// Certain rectangles satisfy this condition...
|
1171 |
if(end < start)
|
1172 |
{ |
1173 |
int tmp = end;
|
1174 |
end = start; |
1175 |
start = tmp; |
1176 |
} |
1177 |
|
1178 |
StringBuffer buf = new StringBuffer(); |
1179 |
Segment seg = new Segment(); |
1180 |
|
1181 |
for(int i = selectionStartLine; i <= selectionEndLine; i++) |
1182 |
{ |
1183 |
Element lineElement = map.getElement(i);
|
1184 |
int lineStart = lineElement.getStartOffset();
|
1185 |
int lineEnd = lineElement.getEndOffset() - 1; |
1186 |
int lineLen = lineEnd - lineStart;
|
1187 |
|
1188 |
lineStart = Math.min(lineStart + start,lineEnd);
|
1189 |
lineLen = Math.min(end - start,lineEnd - lineStart);
|
1190 |
|
1191 |
getText(lineStart,lineLen,seg); |
1192 |
buf.append(seg.array,seg.offset,seg.count); |
1193 |
|
1194 |
if(i != selectionEndLine)
|
1195 |
buf.append('\n');
|
1196 |
} |
1197 |
|
1198 |
return buf.toString();
|
1199 |
} |
1200 |
else
|
1201 |
{ |
1202 |
return getText(selectionStart,
|
1203 |
selectionEnd - selectionStart); |
1204 |
} |
1205 |
} |
1206 |
|
1207 |
/**
|
1208 |
* Replaces the selection with the specified text.
|
1209 |
* @param selectedText The replacement text for the selection
|
1210 |
*/
|
1211 |
public void setSelectedText(String selectedText) |
1212 |
{ |
1213 |
if(!editable)
|
1214 |
{ |
1215 |
throw new InternalError("Text component" |
1216 |
+ " read only");
|
1217 |
} |
1218 |
|
1219 |
document.beginCompoundEdit(); |
1220 |
|
1221 |
try
|
1222 |
{ |
1223 |
if(rectSelect)
|
1224 |
{ |
1225 |
Element map = document.getDefaultRootElement();
|
1226 |
|
1227 |
int start = selectionStart - map.getElement(selectionStartLine)
|
1228 |
.getStartOffset(); |
1229 |
int end = selectionEnd - map.getElement(selectionEndLine)
|
1230 |
.getStartOffset(); |
1231 |
|
1232 |
// Certain rectangles satisfy this condition...
|
1233 |
if(end < start)
|
1234 |
{ |
1235 |
int tmp = end;
|
1236 |
end = start; |
1237 |
start = tmp; |
1238 |
} |
1239 |
|
1240 |
int lastNewline = 0; |
1241 |
int currNewline = 0; |
1242 |
|
1243 |
for(int i = selectionStartLine; i <= selectionEndLine; i++) |
1244 |
{ |
1245 |
Element lineElement = map.getElement(i);
|
1246 |
int lineStart = lineElement.getStartOffset();
|
1247 |
int lineEnd = lineElement.getEndOffset() - 1; |
1248 |
int rectStart = Math.min(lineEnd,lineStart + start); |
1249 |
|
1250 |
document.remove(rectStart,Math.min(lineEnd - rectStart,
|
1251 |
end - start)); |
1252 |
|
1253 |
if(selectedText == null) |
1254 |
continue;
|
1255 |
|
1256 |
currNewline = selectedText.indexOf('\n',lastNewline);
|
1257 |
if(currNewline == -1) |
1258 |
currNewline = selectedText.length(); |
1259 |
|
1260 |
document.insertString(rectStart,selectedText |
1261 |
.substring(lastNewline,currNewline),null);
|
1262 |
|
1263 |
lastNewline = Math.min(selectedText.length(),
|
1264 |
currNewline + 1);
|
1265 |
} |
1266 |
|
1267 |
if(selectedText != null && |
1268 |
currNewline != selectedText.length()) |
1269 |
{ |
1270 |
int offset = map.getElement(selectionEndLine)
|
1271 |
.getEndOffset() - 1;
|
1272 |
document.insertString(offset,"\n",null); |
1273 |
document.insertString(offset + 1,selectedText
|
1274 |
.substring(currNewline + 1),null); |
1275 |
} |
1276 |
} |
1277 |
else
|
1278 |
{ |
1279 |
document.remove(selectionStart, |
1280 |
selectionEnd - selectionStart); |
1281 |
if(selectedText != null) |
1282 |
{ |
1283 |
document.insertString(selectionStart, |
1284 |
selectedText,null);
|
1285 |
} |
1286 |
} |
1287 |
} |
1288 |
catch(BadLocationException bl) |
1289 |
{ |
1290 |
bl.printStackTrace(); |
1291 |
throw new InternalError("Cannot replace" |
1292 |
+ " selection");
|
1293 |
} |
1294 |
// No matter what happends... stops us from leaving document
|
1295 |
// in a bad state
|
1296 |
finally
|
1297 |
{ |
1298 |
document.endCompoundEdit(); |
1299 |
} |
1300 |
|
1301 |
setCaretPosition(selectionEnd); |
1302 |
} |
1303 |
|
1304 |
/**
|
1305 |
* Returns true if this text area is editable, false otherwise.
|
1306 |
*/
|
1307 |
public final boolean isEditable() |
1308 |
{ |
1309 |
return editable;
|
1310 |
} |
1311 |
|
1312 |
/**
|
1313 |
* Sets if this component is editable.
|
1314 |
* @param editable True if this text area should be editable,
|
1315 |
* false otherwise
|
1316 |
*/
|
1317 |
public final void setEditable(boolean editable) |
1318 |
{ |
1319 |
this.editable = editable;
|
1320 |
} |
1321 |
|
1322 |
/**
|
1323 |
* Returns the right click popup menu.
|
1324 |
*/
|
1325 |
public final JPopupMenu getRightClickPopup() |
1326 |
{ |
1327 |
return popup;
|
1328 |
} |
1329 |
|
1330 |
/**
|
1331 |
* Sets the right click popup menu.
|
1332 |
* @param popup The popup
|
1333 |
*/
|
1334 |
public final void setRightClickPopup(JPopupMenu popup) |
1335 |
{ |
1336 |
this.popup = popup;
|
1337 |
} |
1338 |
|
1339 |
/**
|
1340 |
* Returns the `magic' caret position. This can be used to preserve
|
1341 |
* the column position when moving up and down lines.
|
1342 |
*/
|
1343 |
public final int getMagicCaretPosition() |
1344 |
{ |
1345 |
return magicCaret;
|
1346 |
} |
1347 |
|
1348 |
/**
|
1349 |
* Sets the `magic' caret position. This can be used to preserve
|
1350 |
* the column position when moving up and down lines.
|
1351 |
* @param magicCaret The magic caret position
|
1352 |
*/
|
1353 |
public final void setMagicCaretPosition(int magicCaret) |
1354 |
{ |
1355 |
this.magicCaret = magicCaret;
|
1356 |
} |
1357 |
|
1358 |
/**
|
1359 |
* Similar to <code>setSelectedText()</code>, but overstrikes the
|
1360 |
* appropriate number of characters if overwrite mode is enabled.
|
1361 |
* @param str The string
|
1362 |
* @see #setSelectedText(String)
|
1363 |
* @see #isOverwriteEnabled()
|
1364 |
*/
|
1365 |
public void overwriteSetSelectedText(String str) |
1366 |
{ |
1367 |
// Don't overstrike if there is a selection
|
1368 |
if(!overwrite || selectionStart != selectionEnd)
|
1369 |
{ |
1370 |
setSelectedText(str); |
1371 |
return;
|
1372 |
} |
1373 |
|
1374 |
// Don't overstrike if we're on the end of
|
1375 |
// the line
|
1376 |
int caret = getCaretPosition();
|
1377 |
int caretLineEnd = getLineEndOffset(getCaretLine());
|
1378 |
if(caretLineEnd - caret <= str.length())
|
1379 |
{ |
1380 |
setSelectedText(str); |
1381 |
return;
|
1382 |
} |
1383 |
|
1384 |
document.beginCompoundEdit(); |
1385 |
|
1386 |
try
|
1387 |
{ |
1388 |
document.remove(caret,str.length()); |
1389 |
document.insertString(caret,str,null);
|
1390 |
} |
1391 |
catch(BadLocationException bl) |
1392 |
{ |
1393 |
bl.printStackTrace(); |
1394 |
} |
1395 |
finally
|
1396 |
{ |
1397 |
document.endCompoundEdit(); |
1398 |
} |
1399 |
} |
1400 |
|
1401 |
/**
|
1402 |
* Returns true if overwrite mode is enabled, false otherwise.
|
1403 |
*/
|
1404 |
public final boolean isOverwriteEnabled() |
1405 |
{ |
1406 |
return overwrite;
|
1407 |
} |
1408 |
|
1409 |
/**
|
1410 |
* Sets if overwrite mode should be enabled.
|
1411 |
* @param overwrite True if overwrite mode should be enabled,
|
1412 |
* false otherwise.
|
1413 |
*/
|
1414 |
public final void setOverwriteEnabled(boolean overwrite) |
1415 |
{ |
1416 |
this.overwrite = overwrite;
|
1417 |
painter.invalidateSelectedLines(); |
1418 |
} |
1419 |
|
1420 |
/**
|
1421 |
* Returns true if the selection is rectangular, false otherwise.
|
1422 |
*/
|
1423 |
public final boolean isSelectionRectangular() |
1424 |
{ |
1425 |
return rectSelect;
|
1426 |
} |
1427 |
|
1428 |
/**
|
1429 |
* Sets if the selection should be rectangular.
|
1430 |
* @param overwrite True if the selection should be rectangular,
|
1431 |
* false otherwise.
|
1432 |
*/
|
1433 |
public final void setSelectionRectangular(boolean rectSelect) |
1434 |
{ |
1435 |
this.rectSelect = rectSelect;
|
1436 |
painter.invalidateSelectedLines(); |
1437 |
} |
1438 |
|
1439 |
/**
|
1440 |
* Returns the position of the highlighted bracket (the bracket
|
1441 |
* matching the one before the caret)
|
1442 |
*/
|
1443 |
public final int getBracketPosition() |
1444 |
{ |
1445 |
return bracketPosition;
|
1446 |
} |
1447 |
|
1448 |
/**
|
1449 |
* Returns the line of the highlighted bracket (the bracket
|
1450 |
* matching the one before the caret)
|
1451 |
*/
|
1452 |
public final int getBracketLine() |
1453 |
{ |
1454 |
return bracketLine;
|
1455 |
} |
1456 |
|
1457 |
/**
|
1458 |
* Adds a caret change listener to this text area.
|
1459 |
* @param listener The listener
|
1460 |
*/
|
1461 |
public final void addCaretListener(CaretListener listener) |
1462 |
{ |
1463 |
listenerList.add(CaretListener.class,listener);
|
1464 |
} |
1465 |
|
1466 |
/**
|
1467 |
* Removes a caret change listener from this text area.
|
1468 |
* @param listener The listener
|
1469 |
*/
|
1470 |
public final void removeCaretListener(CaretListener listener) |
1471 |
{ |
1472 |
listenerList.remove(CaretListener.class,listener);
|
1473 |
} |
1474 |
|
1475 |
/**
|
1476 |
* Deletes the selected text from the text area and places it
|
1477 |
* into the clipboard.
|
1478 |
*/
|
1479 |
public void cut() |
1480 |
{ |
1481 |
if(editable)
|
1482 |
{ |
1483 |
copy(); |
1484 |
setSelectedText("");
|
1485 |
} |
1486 |
} |
1487 |
|
1488 |
/**
|
1489 |
* Places the selected text into the clipboard.
|
1490 |
*/
|
1491 |
public void copy() |
1492 |
{ |
1493 |
if(selectionStart != selectionEnd)
|
1494 |
{ |
1495 |
Clipboard clipboard = getToolkit().getSystemClipboard();
|
1496 |
|
1497 |
String selection = getSelectedText();
|
1498 |
|
1499 |
int repeatCount = inputHandler.getRepeatCount();
|
1500 |
StringBuffer buf = new StringBuffer(); |
1501 |
for(int i = 0; i < repeatCount; i++) |
1502 |
buf.append(selection); |
1503 |
|
1504 |
clipboard.setContents(new StringSelection(buf.toString()),null); |
1505 |
} |
1506 |
} |
1507 |
|
1508 |
/**
|
1509 |
* Inserts the clipboard contents into the text.
|
1510 |
*/
|
1511 |
public void paste() |
1512 |
{ |
1513 |
if(editable)
|
1514 |
{ |
1515 |
Clipboard clipboard = getToolkit().getSystemClipboard();
|
1516 |
try
|
1517 |
{ |
1518 |
// The MacOS MRJ doesn't convert \r to \n,
|
1519 |
// so do it here
|
1520 |
String selection = ((String)clipboard |
1521 |
.getContents(this).getTransferData(
|
1522 |
DataFlavor.stringFlavor))
|
1523 |
.replace('\r','\n'); |
1524 |
|
1525 |
int repeatCount = inputHandler.getRepeatCount();
|
1526 |
StringBuffer buf = new StringBuffer(); |
1527 |
for(int i = 0; i < repeatCount; i++) |
1528 |
buf.append(selection); |
1529 |
selection = buf.toString(); |
1530 |
setSelectedText(selection); |
1531 |
} |
1532 |
catch(Exception e) |
1533 |
{ |
1534 |
getToolkit().beep(); |
1535 |
System.err.println("Clipboard does not" |
1536 |
+ " contain a string");
|
1537 |
} |
1538 |
} |
1539 |
} |
1540 |
|
1541 |
/**
|
1542 |
* Called by the AWT when this component is removed from it's parent.
|
1543 |
* This stops clears the currently focused component.
|
1544 |
*/
|
1545 |
public void removeNotify() |
1546 |
{ |
1547 |
super.removeNotify();
|
1548 |
if(focusedComponent == this) |
1549 |
focusedComponent = null;
|
1550 |
} |
1551 |
|
1552 |
/**
|
1553 |
* Forwards key events directly to the input handler.
|
1554 |
* This is slightly faster than using a KeyListener
|
1555 |
* because some Swing overhead is avoided.
|
1556 |
*/
|
1557 |
public void processKeyEvent(KeyEvent evt) |
1558 |
{ |
1559 |
if(inputHandler == null) |
1560 |
return;
|
1561 |
switch(evt.getID())
|
1562 |
{ |
1563 |
case KeyEvent.KEY_TYPED: |
1564 |
inputHandler.keyTyped(evt); |
1565 |
break;
|
1566 |
case KeyEvent.KEY_PRESSED: |
1567 |
inputHandler.keyPressed(evt); |
1568 |
break;
|
1569 |
case KeyEvent.KEY_RELEASED: |
1570 |
inputHandler.keyReleased(evt); |
1571 |
break;
|
1572 |
} |
1573 |
} |
1574 |
|
1575 |
// protected members
|
1576 |
protected static String CENTER = "center"; |
1577 |
protected static String RIGHT = "right"; |
1578 |
protected static String BOTTOM = "bottom"; |
1579 |
|
1580 |
protected static JEditTextArea focusedComponent; |
1581 |
protected static Timer caretTimer; |
1582 |
|
1583 |
protected TextAreaPainter painter;
|
1584 |
|
1585 |
protected JPopupMenu popup; |
1586 |
|
1587 |
protected EventListenerList listenerList; |
1588 |
protected MutableCaretEvent caretEvent;
|
1589 |
|
1590 |
protected boolean caretBlinks; |
1591 |
protected boolean caretVisible; |
1592 |
protected boolean blink; |
1593 |
|
1594 |
protected boolean editable; |
1595 |
|
1596 |
protected int firstLine; |
1597 |
protected int visibleLines; |
1598 |
protected int electricScroll; |
1599 |
|
1600 |
protected int horizontalOffset; |
1601 |
|
1602 |
protected JScrollBar vertical; |
1603 |
protected JScrollBar horizontal; |
1604 |
protected boolean scrollBarsInitialized; |
1605 |
|
1606 |
protected InputHandler inputHandler;
|
1607 |
protected SyntaxDocument document;
|
1608 |
protected DocumentHandler documentHandler;
|
1609 |
|
1610 |
protected Segment lineSegment; |
1611 |
|
1612 |
protected int selectionStart; |
1613 |
protected int selectionStartLine; |
1614 |
protected int selectionEnd; |
1615 |
protected int selectionEndLine; |
1616 |
protected boolean biasLeft; |
1617 |
|
1618 |
protected int bracketPosition; |
1619 |
protected int bracketLine; |
1620 |
|
1621 |
protected int magicCaret; |
1622 |
protected boolean overwrite; |
1623 |
protected boolean rectSelect; |
1624 |
|
1625 |
protected void fireCaretEvent() |
1626 |
{ |
1627 |
Object[] listeners = listenerList.getListenerList(); |
1628 |
for(int i = listeners.length - 2; i >= 0; i--) |
1629 |
{ |
1630 |
if(listeners[i] == CaretListener.class) |
1631 |
{ |
1632 |
((CaretListener)listeners[i+1]).caretUpdate(caretEvent); |
1633 |
} |
1634 |
} |
1635 |
super.validate();
|
1636 |
} |
1637 |
|
1638 |
protected void updateBracketHighlight(int newCaretPosition) |
1639 |
{ |
1640 |
if(newCaretPosition == 0) |
1641 |
{ |
1642 |
bracketPosition = bracketLine = -1;
|
1643 |
return;
|
1644 |
} |
1645 |
|
1646 |
try
|
1647 |
{ |
1648 |
int offset = TextUtilities.findMatchingBracket(
|
1649 |
document,newCaretPosition - 1);
|
1650 |
if(offset != -1) |
1651 |
{ |
1652 |
bracketLine = getLineOfOffset(offset); |
1653 |
bracketPosition = offset - getLineStartOffset(bracketLine); |
1654 |
return;
|
1655 |
} |
1656 |
} |
1657 |
catch(BadLocationException bl) |
1658 |
{ |
1659 |
bl.printStackTrace(); |
1660 |
} |
1661 |
|
1662 |
bracketLine = bracketPosition = -1;
|
1663 |
} |
1664 |
|
1665 |
protected void documentChanged(DocumentEvent evt) |
1666 |
{ |
1667 |
DocumentEvent.ElementChange ch = evt.getChange(
|
1668 |
document.getDefaultRootElement()); |
1669 |
|
1670 |
int count;
|
1671 |
if(ch == null) |
1672 |
count = 0;
|
1673 |
else
|
1674 |
count = ch.getChildrenAdded().length - |
1675 |
ch.getChildrenRemoved().length; |
1676 |
|
1677 |
int line = getLineOfOffset(evt.getOffset());
|
1678 |
if(count == 0) |
1679 |
{ |
1680 |
painter.invalidateLine(line); |
1681 |
} |
1682 |
// do magic stuff
|
1683 |
else if(line < firstLine) |
1684 |
{ |
1685 |
setFirstLine(firstLine + count); |
1686 |
} |
1687 |
// end of magic stuff
|
1688 |
else
|
1689 |
{ |
1690 |
painter.invalidateLineRange(line,firstLine + visibleLines); |
1691 |
updateScrollBars(); |
1692 |
} |
1693 |
} |
1694 |
|
1695 |
class ScrollLayout implements LayoutManager |
1696 |
{ |
1697 |
public void addLayoutComponent(String name, Component comp) |
1698 |
{ |
1699 |
if(name.equals(CENTER))
|
1700 |
center = comp; |
1701 |
else if(name.equals(RIGHT)) |
1702 |
right = comp; |
1703 |
else if(name.equals(BOTTOM)) |
1704 |
bottom = comp; |
1705 |
else if(name.equals(LEFT_OF_SCROLLBAR)) |
1706 |
leftOfScrollBar.addElement(comp); |
1707 |
} |
1708 |
|
1709 |
public void removeLayoutComponent(Component comp) |
1710 |
{ |
1711 |
if(center == comp)
|
1712 |
center = null;
|
1713 |
if(right == comp)
|
1714 |
right = null;
|
1715 |
if(bottom == comp)
|
1716 |
bottom = null;
|
1717 |
else
|
1718 |
leftOfScrollBar.removeElement(comp); |
1719 |
} |
1720 |
|
1721 |
public Dimension preferredLayoutSize(Container parent) |
1722 |
{ |
1723 |
Dimension dim = new Dimension(); |
1724 |
Insets insets = getInsets();
|
1725 |
dim.width = insets.left + insets.right; |
1726 |
dim.height = insets.top + insets.bottom; |
1727 |
|
1728 |
Dimension centerPref = center.getPreferredSize();
|
1729 |
dim.width += centerPref.width; |
1730 |
dim.height += centerPref.height; |
1731 |
Dimension rightPref = right.getPreferredSize();
|
1732 |
dim.width += rightPref.width; |
1733 |
Dimension bottomPref = bottom.getPreferredSize();
|
1734 |
dim.height += bottomPref.height; |
1735 |
|
1736 |
return dim;
|
1737 |
} |
1738 |
|
1739 |
public Dimension minimumLayoutSize(Container parent) |
1740 |
{ |
1741 |
Dimension dim = new Dimension(); |
1742 |
Insets insets = getInsets();
|
1743 |
dim.width = insets.left + insets.right; |
1744 |
dim.height = insets.top + insets.bottom; |
1745 |
|
1746 |
Dimension centerPref = center.getMinimumSize();
|
1747 |
dim.width += centerPref.width; |
1748 |
dim.height += centerPref.height; |
1749 |
Dimension rightPref = right.getMinimumSize();
|
1750 |
dim.width += rightPref.width; |
1751 |
Dimension bottomPref = bottom.getMinimumSize();
|
1752 |
dim.height += bottomPref.height; |
1753 |
|
1754 |
return dim;
|
1755 |
} |
1756 |
|
1757 |
public void layoutContainer(Container parent) |
1758 |
{ |
1759 |
Dimension size = parent.getSize();
|
1760 |
Insets insets = parent.getInsets();
|
1761 |
int itop = insets.top;
|
1762 |
int ileft = insets.left;
|
1763 |
int ibottom = insets.bottom;
|
1764 |
int iright = insets.right;
|
1765 |
|
1766 |
int rightWidth = right.getPreferredSize().width;
|
1767 |
int bottomHeight = bottom.getPreferredSize().height;
|
1768 |
int centerWidth = size.width - rightWidth - ileft - iright;
|
1769 |
int centerHeight = size.height - bottomHeight - itop - ibottom;
|
1770 |
|
1771 |
center.setBounds( |
1772 |
ileft, |
1773 |
itop, |
1774 |
centerWidth, |
1775 |
centerHeight); |
1776 |
|
1777 |
right.setBounds( |
1778 |
ileft + centerWidth, |
1779 |
itop, |
1780 |
rightWidth, |
1781 |
centerHeight); |
1782 |
|
1783 |
// Lay out all status components, in order
|
1784 |
Enumeration status = leftOfScrollBar.elements();
|
1785 |
while(status.hasMoreElements())
|
1786 |
{ |
1787 |
Component comp = (Component)status.nextElement(); |
1788 |
Dimension dim = comp.getPreferredSize();
|
1789 |
comp.setBounds(ileft, |
1790 |
itop + centerHeight, |
1791 |
dim.width, |
1792 |
bottomHeight); |
1793 |
ileft += dim.width; |
1794 |
} |
1795 |
|
1796 |
bottom.setBounds( |
1797 |
ileft, |
1798 |
itop + centerHeight, |
1799 |
size.width - rightWidth - ileft - iright, |
1800 |
bottomHeight); |
1801 |
} |
1802 |
|
1803 |
// private members
|
1804 |
private Component center; |
1805 |
private Component right; |
1806 |
private Component bottom; |
1807 |
private Vector leftOfScrollBar = new Vector(); |
1808 |
} |
1809 |
|
1810 |
static class CaretBlinker implements ActionListener |
1811 |
{ |
1812 |
public void actionPerformed(ActionEvent evt) |
1813 |
{ |
1814 |
if(focusedComponent != null |
1815 |
&& focusedComponent.hasFocus()) |
1816 |
focusedComponent.blinkCaret(); |
1817 |
} |
1818 |
} |
1819 |
|
1820 |
class MutableCaretEvent extends CaretEvent |
1821 |
{ |
1822 |
MutableCaretEvent() |
1823 |
{ |
1824 |
super(JEditTextArea.this);
|
1825 |
} |
1826 |
|
1827 |
public int getDot() |
1828 |
{ |
1829 |
return getCaretPosition();
|
1830 |
} |
1831 |
|
1832 |
public int getMark() |
1833 |
{ |
1834 |
return getMarkPosition();
|
1835 |
} |
1836 |
} |
1837 |
|
1838 |
class AdjustHandler implements AdjustmentListener |
1839 |
{ |
1840 |
public void adjustmentValueChanged(final AdjustmentEvent evt) |
1841 |
{ |
1842 |
if(!scrollBarsInitialized)
|
1843 |
return;
|
1844 |
|
1845 |
// If this is not done, mousePressed events accumilate
|
1846 |
// and the result is that scrolling doesn't stop after
|
1847 |
// the mouse is released
|
1848 |
SwingUtilities.invokeLater(new Runnable() { |
1849 |
public void run() |
1850 |
{ |
1851 |
if(evt.getAdjustable() == vertical)
|
1852 |
setFirstLine(vertical.getValue()); |
1853 |
else
|
1854 |
setHorizontalOffset(-horizontal.getValue()); |
1855 |
} |
1856 |
}); |
1857 |
} |
1858 |
} |
1859 |
|
1860 |
class ComponentHandler extends ComponentAdapter |
1861 |
{ |
1862 |
public void componentResized(ComponentEvent evt) |
1863 |
{ |
1864 |
recalculateVisibleLines(); |
1865 |
scrollBarsInitialized = true;
|
1866 |
} |
1867 |
} |
1868 |
|
1869 |
class DocumentHandler implements DocumentListener |
1870 |
{ |
1871 |
public void insertUpdate(DocumentEvent evt) |
1872 |
{ |
1873 |
documentChanged(evt); |
1874 |
|
1875 |
int offset = evt.getOffset();
|
1876 |
int length = evt.getLength();
|
1877 |
|
1878 |
int newStart;
|
1879 |
int newEnd;
|
1880 |
|
1881 |
if(selectionStart > offset || (selectionStart
|
1882 |
== selectionEnd && selectionStart == offset)) |
1883 |
newStart = selectionStart + length; |
1884 |
else
|
1885 |
newStart = selectionStart; |
1886 |
|
1887 |
if(selectionEnd >= offset)
|
1888 |
newEnd = selectionEnd + length; |
1889 |
else
|
1890 |
newEnd = selectionEnd; |
1891 |
|
1892 |
select(newStart,newEnd); |
1893 |
} |
1894 |
|
1895 |
public void removeUpdate(DocumentEvent evt) |
1896 |
{ |
1897 |
documentChanged(evt); |
1898 |
|
1899 |
int offset = evt.getOffset();
|
1900 |
int length = evt.getLength();
|
1901 |
|
1902 |
int newStart;
|
1903 |
int newEnd;
|
1904 |
|
1905 |
if(selectionStart > offset)
|
1906 |
{ |
1907 |
if(selectionStart > offset + length)
|
1908 |
newStart = selectionStart - length; |
1909 |
else
|
1910 |
newStart = offset; |
1911 |
} |
1912 |
else
|
1913 |
newStart = selectionStart; |
1914 |
|
1915 |
if(selectionEnd > offset)
|
1916 |
{ |
1917 |
if(selectionEnd > offset + length)
|
1918 |
newEnd = selectionEnd - length; |
1919 |
else
|
1920 |
newEnd = offset; |
1921 |
} |
1922 |
else
|
1923 |
newEnd = selectionEnd; |
1924 |
|
1925 |
select(newStart,newEnd); |
1926 |
} |
1927 |
|
1928 |
public void changedUpdate(DocumentEvent evt) |
1929 |
{ |
1930 |
} |
1931 |
} |
1932 |
|
1933 |
class DragHandler implements MouseMotionListener |
1934 |
{ |
1935 |
public void mouseDragged(MouseEvent evt) |
1936 |
{ |
1937 |
if(popup != null && popup.isVisible()) |
1938 |
return;
|
1939 |
|
1940 |
setSelectionRectangular((evt.getModifiers() |
1941 |
& InputEvent.CTRL_MASK) != 0); |
1942 |
select(getMarkPosition(),xyToOffset(evt.getX(),evt.getY())); |
1943 |
} |
1944 |
|
1945 |
public void mouseMoved(MouseEvent evt) {} |
1946 |
} |
1947 |
|
1948 |
class FocusHandler implements FocusListener |
1949 |
{ |
1950 |
public void focusGained(FocusEvent evt) |
1951 |
{ |
1952 |
setCaretVisible(true);
|
1953 |
focusedComponent = JEditTextArea.this; |
1954 |
} |
1955 |
|
1956 |
public void focusLost(FocusEvent evt) |
1957 |
{ |
1958 |
setCaretVisible(false);
|
1959 |
focusedComponent = null;
|
1960 |
} |
1961 |
} |
1962 |
|
1963 |
class MouseHandler extends MouseAdapter |
1964 |
{ |
1965 |
public void mousePressed(MouseEvent evt) |
1966 |
{ |
1967 |
requestFocus(); |
1968 |
|
1969 |
// Focus events not fired sometimes?
|
1970 |
setCaretVisible(true);
|
1971 |
focusedComponent = JEditTextArea.this; |
1972 |
|
1973 |
if((evt.getModifiers() & InputEvent.BUTTON3_MASK) != 0 |
1974 |
&& popup != null)
|
1975 |
{ |
1976 |
popup.show(painter,evt.getX(),evt.getY()); |
1977 |
return;
|
1978 |
} |
1979 |
|
1980 |
int line = yToLine(evt.getY());
|
1981 |
int offset = xToOffset(line,evt.getX());
|
1982 |
int dot = getLineStartOffset(line) + offset;
|
1983 |
|
1984 |
switch(evt.getClickCount())
|
1985 |
{ |
1986 |
case 1: |
1987 |
doSingleClick(evt,line,offset,dot); |
1988 |
break;
|
1989 |
case 2: |
1990 |
// It uses the bracket matching stuff, so
|
1991 |
// it can throw a BLE
|
1992 |
try
|
1993 |
{ |
1994 |
doDoubleClick(evt,line,offset,dot); |
1995 |
} |
1996 |
catch(BadLocationException bl) |
1997 |
{ |
1998 |
bl.printStackTrace(); |
1999 |
} |
2000 |
break;
|
2001 |
case 3: |
2002 |
doTripleClick(evt,line,offset,dot); |
2003 |
break;
|
2004 |
} |
2005 |
} |
2006 |
|
2007 |
private void doSingleClick(MouseEvent evt, int line, |
2008 |
int offset, int dot) |
2009 |
{ |
2010 |
if((evt.getModifiers() & InputEvent.SHIFT_MASK) != 0) |
2011 |
{ |
2012 |
rectSelect = (evt.getModifiers() & InputEvent.CTRL_MASK) != 0; |
2013 |
select(getMarkPosition(),dot); |
2014 |
} |
2015 |
else
|
2016 |
setCaretPosition(dot); |
2017 |
} |
2018 |
|
2019 |
private void doDoubleClick(MouseEvent evt, int line, |
2020 |
int offset, int dot) throws BadLocationException |
2021 |
{ |
2022 |
// Ignore empty lines
|
2023 |
if(getLineLength(line) == 0) |
2024 |
return;
|
2025 |
|
2026 |
try
|
2027 |
{ |
2028 |
int bracket = TextUtilities.findMatchingBracket(
|
2029 |
document,Math.max(0,dot - 1)); |
2030 |
if(bracket != -1) |
2031 |
{ |
2032 |
int mark = getMarkPosition();
|
2033 |
// Hack
|
2034 |
if(bracket > mark)
|
2035 |
{ |
2036 |
bracket++; |
2037 |
mark--; |
2038 |
} |
2039 |
select(mark,bracket); |
2040 |
return;
|
2041 |
} |
2042 |
} |
2043 |
catch(BadLocationException bl) |
2044 |
{ |
2045 |
bl.printStackTrace(); |
2046 |
} |
2047 |
|
2048 |
// Ok, it's not a bracket... select the word
|
2049 |
String lineText = getLineText(line);
|
2050 |
char ch = lineText.charAt(Math.max(0,offset - 1)); |
2051 |
|
2052 |
String noWordSep = (String)document.getProperty("noWordSep"); |
2053 |
if(noWordSep == null) |
2054 |
noWordSep = "";
|
2055 |
|
2056 |
// If the user clicked on a non-letter char,
|
2057 |
// we select the surrounding non-letters
|
2058 |
boolean selectNoLetter = (!Character |
2059 |
.isLetterOrDigit(ch) |
2060 |
&& noWordSep.indexOf(ch) == -1);
|
2061 |
|
2062 |
int wordStart = 0; |
2063 |
|
2064 |
for(int i = offset - 1; i >= 0; i--) |
2065 |
{ |
2066 |
ch = lineText.charAt(i); |
2067 |
if(selectNoLetter ^ (!Character |
2068 |
.isLetterOrDigit(ch) && |
2069 |
noWordSep.indexOf(ch) == -1))
|
2070 |
{ |
2071 |
wordStart = i + 1;
|
2072 |
break;
|
2073 |
} |
2074 |
} |
2075 |
|
2076 |
int wordEnd = lineText.length();
|
2077 |
for(int i = offset; i < lineText.length(); i++) |
2078 |
{ |
2079 |
ch = lineText.charAt(i); |
2080 |
if(selectNoLetter ^ (!Character |
2081 |
.isLetterOrDigit(ch) && |
2082 |
noWordSep.indexOf(ch) == -1))
|
2083 |
{ |
2084 |
wordEnd = i; |
2085 |
break;
|
2086 |
} |
2087 |
} |
2088 |
|
2089 |
int lineStart = getLineStartOffset(line);
|
2090 |
select(lineStart + wordStart,lineStart + wordEnd); |
2091 |
|
2092 |
/*
|
2093 |
String lineText = getLineText(line);
|
2094 |
String noWordSep = (String)document.getProperty("noWordSep");
|
2095 |
int wordStart = TextUtilities.findWordStart(lineText,offset,noWordSep);
|
2096 |
int wordEnd = TextUtilities.findWordEnd(lineText,offset,noWordSep);
|
2097 |
|
2098 |
int lineStart = getLineStartOffset(line);
|
2099 |
select(lineStart + wordStart,lineStart + wordEnd);
|
2100 |
*/
|
2101 |
} |
2102 |
|
2103 |
private void doTripleClick(MouseEvent evt, int line, |
2104 |
int offset, int dot) |
2105 |
{ |
2106 |
select(getLineStartOffset(line),getLineEndOffset(line)-1);
|
2107 |
} |
2108 |
} |
2109 |
|
2110 |
class CaretUndo extends AbstractUndoableEdit |
2111 |
{ |
2112 |
private int start; |
2113 |
private int end; |
2114 |
|
2115 |
CaretUndo(int start, int end) |
2116 |
{ |
2117 |
this.start = start;
|
2118 |
this.end = end;
|
2119 |
} |
2120 |
|
2121 |
public boolean isSignificant() |
2122 |
{ |
2123 |
return false; |
2124 |
} |
2125 |
|
2126 |
public String getPresentationName() |
2127 |
{ |
2128 |
return "caret move"; |
2129 |
} |
2130 |
|
2131 |
public void undo() throws CannotUndoException |
2132 |
{ |
2133 |
super.undo();
|
2134 |
|
2135 |
select(start,end); |
2136 |
} |
2137 |
|
2138 |
public void redo() throws CannotRedoException |
2139 |
{ |
2140 |
super.redo();
|
2141 |
|
2142 |
select(start,end); |
2143 |
} |
2144 |
|
2145 |
public boolean addEdit(UndoableEdit edit) |
2146 |
{ |
2147 |
if(edit instanceof CaretUndo) |
2148 |
{ |
2149 |
CaretUndo cedit = (CaretUndo)edit; |
2150 |
start = cedit.start; |
2151 |
end = cedit.end; |
2152 |
cedit.die(); |
2153 |
|
2154 |
return true; |
2155 |
} |
2156 |
else
|
2157 |
return false; |
2158 |
} |
2159 |
} |
2160 |
|
2161 |
static
|
2162 |
{ |
2163 |
caretTimer = new Timer(500,new CaretBlinker()); |
2164 |
caretTimer.setInitialDelay(500);
|
2165 |
caretTimer.start(); |
2166 |
} |
2167 |
} |