/*
* Copyright (C) 2007 Quadduc <quadduc@gmail.com>
* Copyright (C) 2008 IsmAvatar <IsmAvatar@gmail.com>
*
* This file is part of LateralGM.
* LateralGM is free software and comes with ABSOLUTELY NO WARRANTY.
* See LICENSE for details.
*
* This file incorporates work covered by the following copyright and
* permission notice:
*
* JEditTextArea.java - jEdit's text component
* Copyright (C) 1999 Slava Pestov
*
* You may use and modify this package for any purpose. Redistribution is
* permitted, in both source and binary form, provided that this notice
* remains intact in all source distributions of this package.
*/
package org.lateralgm.jedit;
import java.awt.AWTEvent;
import java.awt.Component;
import java.awt.Container;
import java.awt.Dimension;
import java.awt.FontMetrics;
import java.awt.Insets;
import java.awt.LayoutManager;
import java.awt.datatransfer.Clipboard;
import java.awt.datatransfer.DataFlavor;
import java.awt.datatransfer.StringSelection;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.AdjustmentEvent;
import java.awt.event.AdjustmentListener;
import java.awt.event.ComponentAdapter;
import java.awt.event.ComponentEvent;
import java.awt.event.FocusEvent;
import java.awt.event.FocusListener;
import java.awt.event.InputEvent;
import java.awt.event.KeyEvent;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;
import java.awt.event.MouseMotionListener;
import java.awt.event.MouseWheelEvent;
import java.awt.event.MouseWheelListener;
import java.util.Enumeration;
import java.util.Vector;
import javax.swing.JComponent;
import javax.swing.JPopupMenu;
import javax.swing.JScrollBar;
import javax.swing.SwingUtilities;
import javax.swing.Timer;
import javax.swing.event.CaretEvent;
import javax.swing.event.CaretListener;
import javax.swing.event.DocumentEvent;
import javax.swing.event.DocumentListener;
import javax.swing.event.EventListenerList;
import javax.swing.text.BadLocationException;
import javax.swing.text.Element;
import javax.swing.text.Segment;
import javax.swing.text.Utilities;
import javax.swing.undo.AbstractUndoableEdit;
import javax.swing.undo.UndoableEdit;
/**
* jEdit's text area component. It is more suited for editing program
* source code than JEditorPane, because it drops the unnecessary features
* (images, variable-width lines, and so on) and adds a whole bunch of
* useful goodies such as:
* <ul>
* <li>More flexible key binding scheme
* <li>Supports macro recorders
* <li>Rectangular selection
* <li>Bracket highlighting
* <li>Syntax highlighting
* <li>Command repetition
* <li>Block caret can be enabled
* </ul>
* It is also faster and doesn't have as many problems. It can be used
* in other applications; the only other part of jEdit it depends on is
* the syntax package.<p>
*
* To use it in your app, treat it like any other component, for example:
* <pre>JEditTextArea ta = new JEditTextArea();
* ta.setTokenMarker(new JavaTokenMarker());
* ta.setText("public class Test2 {\n"
* + " public static void main(String[] args) {\n"
* + " System.out.println(\"Hello World\");\n"
* + " }\n"
* + "}");</pre>
*
* @author Slava Pestov
*/
public class JEditTextArea extends JComponent
{
private static final long serialVersionUID = 1L;
/**
* Adding components with this name to the text area will place
* them left of the horizontal scroll bar. In jEdit, the status
* bar is added this way.
*/
public static final String LEFT_OF_SCROLLBAR = "los";
/** The number of lines always visible from the top or bottom */
public int electricScroll;
public boolean editable;
public InputHandler inputHandler;
/** Used to preserve the caret's column position when moving up and down lines. */
public int magicCaret;
public JEditTextArea()
{
TextAreaDefaults defaults = TextAreaDefaults.getDefaults();
// Enable the necessary events
enableEvents(AWTEvent.KEY_EVENT_MASK);
// Initialize some misc. stuff
painter = new TextAreaPainter(this,defaults);
// Debugging code
// painter.addCustomHighlight(new TextAreaPainter.Highlight()
// {
// public String getToolTipText(MouseEvent evt)
// {
// return null;
// }
//
// public void init(JEditTextArea textArea, Highlight next)
// {
// }
//
// public void paintHighlight(Graphics gfx, int line, int y)
// {
// if (line != widestLine) return;
// gfx.setColor(new Color(192,255,192));
// FontMetrics fm = painter.getFontMetrics();
// y += TextAreaPainter.LINE_SPACING + fm.getMaxDescent();
// int height = painter.getLineHeight();
// gfx.fillRect(0,y + 2,getWidth(),height - 4);
// }
// });
documentHandler = new DocumentHandler();
listenerList = new EventListenerList();
caretEvent = new MutableCaretEvent();
lineSegment = new Segment();
bracketPosition = -1;
bracketLine = -1;
blink = true;
// Initialize the GUI
setLayout(new ScrollLayout());
add(CENTER,painter);
vertical = new JScrollBar(JScrollBar.VERTICAL);
horizontal = new JScrollBar(JScrollBar.HORIZONTAL);
add(RIGHT,vertical);
add(BOTTOM,horizontal);
// Add some event listeners
vertical.addAdjustmentListener(new AdjustHandler());
horizontal.addAdjustmentListener(new AdjustHandler());
painter.addComponentListener(new ComponentHandler());
painter.addMouseListener(new MouseHandler());
painter.addMouseMotionListener(new DragHandler());
addFocusListener(new FocusHandler());
addMouseWheelListener(new MouseWheelListener()
{
public void mouseWheelMoved(MouseWheelEvent e)
{
if (e.getScrollType() == MouseWheelEvent.WHEEL_UNIT_SCROLL)
vertical.setValue(vertical.getValue() + e.getUnitsToScroll());
}
});
setFocusTraversalKeysEnabled(false);
// Load the defaults
inputHandler = defaults.inputHandler;
setDocument(defaults.document);
editable = defaults.editable;
caretVisible = defaults.caretVisible;
electricScroll = defaults.electricScroll;
popup = defaults.popup;
// We don't seem to get the initial focus event?
focusedComponent = this;
}
public final boolean isCaretVisible()
{
return blink && caretVisible;
}
public void setCaretVisible(boolean caretVisible)
{
this.caretVisible = caretVisible;
blink = true;
painter.invalidateSelectedLines();
}
/** Blinks the caret. */
public final void blinkCaret()
{
blink = !blink;
painter.invalidateSelectedLines();
}
/**
* Updates the state of the scroll bars. This should be called
* if the number of lines in the document changes, or when the
* size of the text are changes.
*/
public void updateScrollBars()
{
if (vertical != null && visibleLines != 0)
{
vertical.setValues(firstLine,visibleLines,0,getLineCount());
vertical.setUnitIncrement(2);
vertical.setBlockIncrement(visibleLines);
}
int width = painter.getWidth();
if (horizontal != null && width != 0)
{
int w = painter.getFontMetrics().charWidth('w');
int mw = widestLineWidth + w;
int oho = horizontalOffset;
if (width - horizontalOffset > mw) horizontalOffset = width - mw;
if (horizontalOffset > 0) horizontalOffset = 0;
if (oho != horizontalOffset) painter.repaint();
horizontal.setValues(-horizontalOffset,width,0,mw);
horizontal.setUnitIncrement(w);
horizontal.setBlockIncrement(width / 2);
}
}
/** Returns the line displayed at the text area's origin */
public final int getFirstLine()
{
return firstLine;
}
/**
* Sets the line displayed at the text area's origin without
* updating the scroll bars.
*/
public void setFirstLine(int firstLine)
{
if (firstLine == this.firstLine) return;
this.firstLine = firstLine;
if (firstLine != vertical.getValue()) updateScrollBars();
painter.repaint();
}
/** Returns the number of lines visible in this text area */
public final int getVisibleLines()
{
return visibleLines;
}
/**
* Recalculates the number of visible lines. This should not
* be called directly.
*/
public final void recalculateVisibleLines()
{
if (painter == null) return;
int height = painter.getHeight();
int lineHeight = painter.getLineHeight();
visibleLines = height / lineHeight;
updateScrollBars();
}
/** Returns the horizontal offset of drawn lines. */
public final int getHorizontalOffset()
{
return horizontalOffset;
}
/**
* Sets the horizontal offset of drawn lines. This can be used to
* implement horizontal scrolling.
* @param horizontalOffset offset The new horizontal offset
*/
public void setHorizontalOffset(int horizontalOffset)
{
if (horizontalOffset == this.horizontalOffset) return;
this.horizontalOffset = horizontalOffset;
if (horizontalOffset != horizontal.getValue()) updateScrollBars();
painter.repaint();
}
/**
* A fast way of changing both the first line and horizontal
* offset.
* @param firstLine The new first line
* @param horizontalOffset The new horizontal offset
* @return True if any of the values were changed, false otherwise
*/
public boolean setOrigin(int firstLine, int horizontalOffset)
{
boolean changed = false;
if (horizontalOffset != this.horizontalOffset)
{
this.horizontalOffset = horizontalOffset;
changed = true;
}
if (firstLine != this.firstLine)
{
this.firstLine = firstLine;
changed = true;
}
if (changed)
{
updateScrollBars();
painter.repaint();
}
return changed;
}
/**
* Ensures that the caret is visible by scrolling the text area if
* necessary.
* @return True if scrolling was actually performed, false if the
* caret was already visible
*/
public boolean scrollToCaret()
{
int line = getCaretLine();
int lineStart = getLineStartOffset(line);
int offset = Math.max(0,Math.min(getLineLength(line) - 1,getCaretPosition() - lineStart));
return scrollTo(line,offset);
}
/**
* Ensures that the specified line and offset is visible by scrolling
* the text area if necessary.
* @param line The line to scroll to
* @param offset The offset in the line to scroll to
* @return True if scrolling was actually performed, false if the
* line and offset was already visible
*/
public boolean scrollTo(int line, int offset)
{
// visibleLines == 0 before the component is realized
// we can't do any proper scrolling then, so we have
// this hack...
if (visibleLines == 0)
{
setFirstLine(Math.max(0,line - electricScroll));
return true;
}
int newFirstLine = firstLine;
int newHorizontalOffset = horizontalOffset;
if (line < firstLine + electricScroll)
{
newFirstLine = Math.max(0,line - electricScroll);
}
else if (line + electricScroll >= firstLine + visibleLines)
{
newFirstLine = (line - visibleLines) + electricScroll + 1;
if (newFirstLine + visibleLines >= getLineCount())
newFirstLine = getLineCount() - visibleLines;
if (newFirstLine < 0) newFirstLine = 0;
}
int x = fOffsetToX(line,offset);
int width = painter.getFontMetrics().charWidth('w');
if (x < 0)
{
newHorizontalOffset = Math.min(0,horizontalOffset - x + width + 5);
}
else if (x + width >= painter.getWidth())
{
newHorizontalOffset = horizontalOffset + (painter.getWidth() - x) - width - 5;
}
return setOrigin(newFirstLine,newHorizontalOffset);
}
/**
* Converts a line index to a y co-ordinate.
* @param line The line
*/
public int lineToY(int line)
{
FontMetrics fm = painter.getFontMetrics();
return (line - firstLine) * painter.getLineHeight()
- (TextAreaPainter.LINE_SPACING + fm.getMaxDescent());
}
/**
* Converts a y co-ordinate to a line index.
* @param y The y co-ordinate
*/
public int yToLine(int y)
{
int height = painter.getLineHeight();
return Math.max(0,Math.min(getLineCount() - 1,y / height + firstLine));
}
/**
* Converts an offset in a line into an x co-ordinate. This is a
* slow version that can be used any time.
* @param line The line
* @param offset The offset, from the start of the line
*/
public final int offsetToX(int line, int offset)
{
// don't use cached tokens
painter.currentLineTokens = null;
return fOffsetToX(line,offset);
}
/**
* Converts an offset in a line into an x co-ordinate. This is a
* fast version that should only be used if no changes were made
* to the text since the last repaint.
* @param line The line
* @param offset The offset, from the start of the line
*/
public int fOffsetToX(int line, int offset)
{
TokenMarker tokenMarker = getTokenMarker();
/* Use painter's cached info for speed */
FontMetrics fm = painter.getFontMetrics();
getLineText(line,lineSegment);
int segmentOffset = lineSegment.offset;
int x = horizontalOffset;
/* If syntax coloring is disabled, do simple translation */
if (tokenMarker == null)
{
lineSegment.count = offset;
return x + Utilities.getTabbedTextWidth(lineSegment,fm,x,painter,0);
}
/* If syntax coloring is enabled, we have to do this because
* tokens can vary in width */
Token tokens;
if (painter.currentLineIndex == line && painter.currentLineTokens != null)
tokens = painter.currentLineTokens;
else
{
painter.currentLineIndex = line;
painter.currentLineTokens = tokenMarker.markTokens(lineSegment,line);
tokens = painter.currentLineTokens;
}
// Font defaultFont = painter.getFont();
// SyntaxStyle[] styles = painter.getStyles();
for (;;)
{
byte id = tokens.id;
if (id == Token.END)
{
return x;
}
// if (id == Token.NULL)
fm = painter.getFontMetrics();
// else
// fm = styles[id].getFontMetrics(defaultFont);
int length = tokens.length;
if (offset + segmentOffset < lineSegment.offset + length)
{
lineSegment.count = offset - (lineSegment.offset - segmentOffset);
return x + Utilities.getTabbedTextWidth(lineSegment,fm,x,painter,0);
}
lineSegment.count = length;
x += Utilities.getTabbedTextWidth(lineSegment,fm,x,painter,0);
lineSegment.offset += length;
tokens = tokens.next;
}
}
/**
* Converts an x co-ordinate to an offset within a line.
* @param line The line
* @param x The x co-ordinate
*/
public int xToOffset(int line, int x)
{
TokenMarker tokenMarker = getTokenMarker();
/* Use painter's cached info for speed */
FontMetrics fm = painter.getFontMetrics();
getLineText(line,lineSegment);
char[] segmentArray = lineSegment.array;
int segmentOffset = lineSegment.offset;
int segmentCount = lineSegment.count;
int width = horizontalOffset;
if (tokenMarker == null)
{
for (int i = 0; i < segmentCount; i++)
{
char c = segmentArray[i + segmentOffset];
int charWidth;
if (c == '\t')
charWidth = (int) painter.nextTabStop(width,i) - width;
else
charWidth = fm.charWidth(c);
if (painter.isBlockCaretEnabled())
{
if (x - charWidth <= width) return i;
}
else
{
if (x - charWidth / 2 <= width) return i;
}
width += charWidth;
}
return segmentCount;
}
Token tokens;
if (painter.currentLineIndex == line && painter.currentLineTokens != null)
tokens = painter.currentLineTokens;
else
{
painter.currentLineIndex = line;
painter.currentLineTokens = tokenMarker.markTokens(lineSegment,line);
tokens = painter.currentLineTokens;
}
int offset = 0;
// Font defaultFont = painter.getFont();
// SyntaxStyle[] styles = painter.getStyles();
for (;;)
{
byte id = tokens.id;
if (id == Token.END) return offset;
// if (id == Token.NULL)
fm = painter.getFontMetrics();
// else
// fm = styles[id].getFontMetrics(defaultFont);
int length = tokens.length;
for (int i = 0; i < length; i++)
{
char c = segmentArray[segmentOffset + offset + i];
int charWidth;
if (c == '\t')
charWidth = (int) painter.nextTabStop(width,offset + i) - width;
else
charWidth = fm.charWidth(c);
if (painter.isBlockCaretEnabled())
{
if (x - charWidth <= width) return offset + i;
}
else
{
if (x - charWidth / 2 <= width) return offset + i;
}
width += charWidth;
}
offset += length;
tokens = tokens.next;
}
}
/**
* Converts a point to an offset, from the start of the text.
* @param x The x co-ordinate of the point
* @param y The y co-ordinate of the point
*/
public int xyToOffset(int x, int y)
{
int line = yToLine(y);
int start = getLineStartOffset(line);
return start + xToOffset(line,x);
}
/** Returns the document this text area is editing. */
public final SyntaxDocument getDocument()
{
return document;
}
/**
* Sets the document this text area is editing.
* @param document The document
*/
public void setDocument(SyntaxDocument document)
{
if (this.document == document) return;
if (this.document != null) this.document.removeDocumentListener(documentHandler);
this.document = document;
document.addDocumentListener(documentHandler);
select(0,0);
updateScrollBars();
painter.repaint();
}
/**
* Returns the document's token marker. Equivalent to calling
* <code>getDocument().getTokenMarker()</code>.
*/
public final TokenMarker getTokenMarker()
{
return document.getTokenMarker();
}
/**
* Sets the document's token marker. Equivalent to caling
* <code>getDocument().setTokenMarker()</code>.
* @param tokenMarker The token marker
*/
public final void setTokenMarker(TokenMarker tokenMarker)
{
document.setTokenMarker(tokenMarker);
}
/**
* Returns the length of the document. Equivalent to calling
* <code>getDocument().getLength()</code>.
*/
public final int getDocumentLength()
{
return document.getLength();
}
/** Returns the number of lines in the document */
public final int getLineCount()
{
return document.getDefaultRootElement().getElementCount();
}
/**
* Returns the line containing the specified offset.
* @param offset The offset
*/
public final int getLineOfOffset(int offset)
{
return document.getDefaultRootElement().getElementIndex(offset);
}
/**
* Returns the start offset of the specified line.
* @param line The line
* @return The start offset of the specified line, or -1 if the line is
* invalid
*/
public int getLineStartOffset(int line)
{
Element lineElement = document.getDefaultRootElement().getElement(line);
if (lineElement == null) return -1;
return lineElement.getStartOffset();
}
/**
* Returns the end offset of the specified line.
* @param line The line
* @return The end offset of the specified line, or -1 if the line is
* invalid.
*/
public int getLineEndOffset(int line)
{
Element lineElement = document.getDefaultRootElement().getElement(line);
if (lineElement == null) return -1;
return lineElement.getEndOffset();
}
public int getLineLength(int line)
{
Element lineElement = document.getDefaultRootElement().getElement(line);
if (lineElement == null) return -1;
return lineElement.getEndOffset() - lineElement.getStartOffset() - 1;
}
public String getText()
{
try
{
return document.getText(0,document.getLength());
}
catch (BadLocationException bl)
{
bl.printStackTrace();
return null;
}
}
public void setText(String text)
{
try
{
document.beginStructEdit();
document.remove(0,document.getLength());
document.insertString(0,text,null);
}
catch (BadLocationException bl)
{
bl.printStackTrace();
}
finally
{
document.endStructEdit();
}
}
/**
* Returns the specified substring of the document.
* @param start The start offset
* @param len The length of the substring
* @return The substring, or null if the offsets are invalid
*/
public final String getText(int start, int len)
{
try
{
return document.getText(start,len);
}
catch (BadLocationException bl)
{
bl.printStackTrace();
return null;
}
}
/**
* Copies the specified substring of the document into a segment.
* If the offsets are invalid, the segment will contain a null string.
* @param start The start offset
* @param len The length of the substring
* @param segment The segment
*/
public final void getText(int start, int len, Segment segment)
{
try
{
document.getText(start,len,segment);
}
catch (BadLocationException bl)
{
bl.printStackTrace();
segment.count = 0;
segment.offset = 0;
}
}
/**
* Returns the text on the specified line.
* @param lineIndex The line
* @return The text, or null if the line is invalid
*/
public final String getLineText(int lineIndex)
{
int start = getLineStartOffset(lineIndex);
return getText(start,getLineEndOffset(lineIndex) - start - 1);
}
/**
* Copies the text on the specified line into a segment. If the line
* is invalid, the segment will contain a null string.
* @param lineIndex The line
*/
public final void getLineText(int lineIndex, Segment segment)
{
int start = getLineStartOffset(lineIndex);
getText(start,getLineEndOffset(lineIndex) - start - 1,segment);
}
/**
* Returns the selection start offset.
*/
public final int getSelectionStart()
{
return selectionStart;
}
/**
* Returns the offset where the selection starts on the specified
* line.
*/
public int getSelectionStart(int line)
{
if (line == selectionStartLine)
return selectionStart;
else if (rectSelect)
{
Element map = document.getDefaultRootElement();
int start = selectionStart - map.getElement(selectionStartLine).getStartOffset();
Element lineElement = map.getElement(line);
int lineStart = lineElement.getStartOffset();
int lineEnd = lineElement.getEndOffset() - 1;
return Math.min(lineEnd,lineStart + start);
}
else
return getLineStartOffset(line);
}
/**
* Returns the selection start line.
*/
public final int getSelectionStartLine()
{
return selectionStartLine;
}
/**
* Sets the selection start. The new selection will be the new
* selection start and the old selection end.
* @param selectionStart The selection start
* @see #select(int,int)
*/
public final void setSelectionStart(int selectionStart)
{
select(selectionStart,selectionEnd);
}
/**
* Returns the selection end offset.
*/
public final int getSelectionEnd()
{
return selectionEnd;
}
/**
* Returns the offset where the selection ends on the specified
* line.
*/
public int getSelectionEnd(int line)
{
if (line == selectionEndLine)
return selectionEnd;
else if (rectSelect)
{
Element map = document.getDefaultRootElement();
int end = selectionEnd - map.getElement(selectionEndLine).getStartOffset();
Element lineElement = map.getElement(line);
int lineStart = lineElement.getStartOffset();
int lineEnd = lineElement.getEndOffset() - 1;
return Math.min(lineEnd,lineStart + end);
}
else
return getLineEndOffset(line) - 1;
}
/**
* Returns the selection end line.
*/
public final int getSelectionEndLine()
{
return selectionEndLine;
}
/**
* Sets the selection end. The new selection will be the old
* selection start and the bew selection end.
* @param selectionEnd The selection end
* @see #select(int,int)
*/
public final void setSelectionEnd(int selectionEnd)
{
select(selectionStart,selectionEnd);
}
/**
* Returns the caret position. This will either be the selection
* start or the selection end, depending on which direction the
* selection was made in.
*/
public final int getCaretPosition()
{
return (biasLeft ? selectionStart : selectionEnd);
}
public final int getCaretLine()
{
return (biasLeft ? selectionStartLine : selectionEndLine);
}
public final int getCaretColumn()
{
return getCaretPosition() - getLineStartOffset(getCaretLine());
}
/**
* Gets the selection bound opposite of the caret
* @see #getCaretPosition()
*/
public final int getMarkPosition()
{
return (biasLeft ? selectionEnd : selectionStart);
}
/** Gets the line of the selection bound opposite of the caret */
public final int getMarkLine()
{
return (biasLeft ? selectionEndLine : selectionStartLine);
}
/**
* Sets the caret position. The new selection will consist of the
* caret position only (hence no text will be selected)
* @param caret The caret position
* @see #select(int,int)
*/
public final void setCaretPosition(int caret)
{
select(caret,caret);
}
/**
* Selects from the start offset to the end offset. This is the
* general selection method used by all other selecting methods.
* The caret position will be start if start < end, and end
* if end > start.
* @param start The start offset
* @param end The end offset
*/
public void select(int start, int end)
{
int newStart, newEnd;
boolean newBias;
if (start <= end)
{
newStart = start;
newEnd = end;
newBias = false;
}
else
{
newStart = end;
newEnd = start;
newBias = true;
}
if (newStart < 0 || newEnd > getDocumentLength())
{
throw new IllegalArgumentException("Bounds out of range: " + newStart + "," + newEnd);
}
// If the new position is the same as the old, we don't
// do all this crap, however we still do the stuff at
// the end (clearing magic position, scrolling)
if (newStart != selectionStart || newEnd != selectionEnd || newBias != biasLeft)
{
int newStartLine = getLineOfOffset(newStart);
int newEndLine = getLineOfOffset(newEnd);
if (painter.isBracketHighlightEnabled())
{
if (bracketLine != -1) painter.invalidateLine(bracketLine);
updateBracketHighlight(end);
if (bracketLine != -1) painter.invalidateLine(bracketLine);
}
painter.invalidateLineRange(selectionStartLine,selectionEndLine);
painter.invalidateLineRange(newStartLine,newEndLine);
document.addUndoableEdit(new CaretUndo(selectionStart,selectionEnd));
selectionStart = newStart;
selectionEnd = newEnd;
selectionStartLine = newStartLine;
selectionEndLine = newEndLine;
biasLeft = newBias;
fireCaretEvent();
}
// When the user is typing, etc, we don't want the caret
// to blink
blink = true;
caretTimer.restart();
// Disable rectangle select if selection start = selection end
if (selectionStart == selectionEnd) rectSelect = false;
// Clear the `magic' caret position used by up/down
magicCaret = -1;
scrollToCaret();
}
/**
* Returns the selected text, or null if no selection is active.
*/
public final String getSelectedText()
{
if (selectionStart == selectionEnd) return null;
if (rectSelect)
{
// Return each row of the selection on a new line
Element map = document.getDefaultRootElement();
int start = selectionStart - map.getElement(selectionStartLine).getStartOffset();
int end = selectionEnd - map.getElement(selectionEndLine).getStartOffset();
// Certain rectangles satisfy this condition...
if (end < start)
{
int tmp = end;
end = start;
start = tmp;
}
StringBuffer buf = new StringBuffer();
Segment seg = new Segment();
for (int i = selectionStartLine; i <= selectionEndLine; i++)
{
Element lineElement = map.getElement(i);
int lineStart = lineElement.getStartOffset();
int lineEnd = lineElement.getEndOffset() - 1;
int lineLen = lineEnd - lineStart;
lineStart = Math.min(lineStart + start,lineEnd);
lineLen = Math.min(end - start,lineEnd - lineStart);
getText(lineStart,lineLen,seg);
buf.append(seg.array,seg.offset,seg.count);
if (i != selectionEndLine) buf.append('\n');
}
return buf.toString();
}
return getText(selectionStart,selectionEnd - selectionStart);
}
/**
* Replaces the selection with the specified text.
* @param selectedText The replacement text for the selection
*/
public void setSelectedText(String selectedText)
{
if (!editable)
{
throw new InternalError("Text component read only");
}
document.beginStructEdit();
try
{
if (rectSelect)
{
Element map = document.getDefaultRootElement();
int start = selectionStart - map.getElement(selectionStartLine).getStartOffset();
int end = selectionEnd - map.getElement(selectionEndLine).getStartOffset();
// Certain rectangles satisfy this condition...
if (end < start)
{
int tmp = end;
end = start;
start = tmp;
}
int lastNewline = 0;
int currNewline = 0;
for (int i = selectionStartLine; i <= selectionEndLine; i++)
{
Element lineElement = map.getElement(i);
int lineStart = lineElement.getStartOffset();
int lineEnd = lineElement.getEndOffset() - 1;
int rectStart = Math.min(lineEnd,lineStart + start);
document.remove(rectStart,Math.min(lineEnd - rectStart,end - start));
if (selectedText == null) continue;
currNewline = selectedText.indexOf('\n',lastNewline);
if (currNewline == -1) currNewline = selectedText.length();
document.insertString(rectStart,selectedText.substring(lastNewline,currNewline),null);
lastNewline = Math.min(selectedText.length(),currNewline + 1);
}
if (selectedText != null && currNewline != selectedText.length())
{
int offset = map.getElement(selectionEndLine).getEndOffset() - 1;
document.insertString(offset,"\n",null);
document.insertString(offset + 1,selectedText.substring(currNewline + 1),null);
}
}
else
{
document.remove(selectionStart,selectionEnd - selectionStart);
if (selectedText != null)
{
document.insertString(selectionStart,selectedText,null);
}
}
}
catch (BadLocationException bl)
{
bl.printStackTrace();
throw new InternalError("Cannot replace selection");
}
// No matter what happends... stops us from leaving document
// in a bad state
finally
{
document.endStructEdit();
}
setCaretPosition(selectionEnd);
}
/**
* Similar to <code>setSelectedText()</code>, but overstrikes the
* appropriate number of characters if overwrite mode is enabled.
* @param str The string
* @see #setSelectedText(String)
* @see #isOverwriteEnabled()
*/
public void overwriteSetSelectedText(String str)
{
// Don't overstrike if there is a selection
if (!overwrite || selectionStart != selectionEnd)
{
setSelectedText(str);
return;
}
// Don't overstrike if we're on the end of
// the line
int caret = getCaretPosition();
int caretLineEnd = getLineEndOffset(getCaretLine());
if (caretLineEnd - caret <= str.length())
{
setSelectedText(str);
return;
}
document.beginStructEdit();
try
{
document.remove(caret,str.length());
document.insertString(caret,str,null);
}
catch (BadLocationException bl)
{
bl.printStackTrace();
}
finally
{
document.endStructEdit();
}
}
public final boolean isOverwriteEnabled()
{
return overwrite;
}
public final void setOverwriteEnabled(boolean overwrite)
{
this.overwrite = overwrite;
painter.invalidateSelectedLines();
}
public final boolean isSelectionRectangular()
{
return rectSelect;
}
public final void setSelectionRectangular(boolean rectSelect)
{
this.rectSelect = rectSelect;
painter.invalidateSelectedLines();
}
/**
* Returns the position of the highlighted bracket (the bracket
* matching the one before the caret)
*/
public final int getBracketPosition()
{
return bracketPosition;
}
/**
* Returns the line of the highlighted bracket (the bracket
* matching the one before the caret)
*/
public final int getBracketLine()
{
return bracketLine;
}
public final void addCaretListener(CaretListener listener)
{
listenerList.add(CaretListener.class,listener);
}
public final void removeCaretListener(CaretListener listener)
{
listenerList.remove(CaretListener.class,listener);
}
public void cut()
{
if (editable)
{
copy();
setSelectedText("");
}
}
public void copy()
{
if (selectionStart != selectionEnd)
{
Clipboard clipboard = getToolkit().getSystemClipboard();
String selection = getSelectedText();
int repeatCount = inputHandler.getRepeatCount();
StringBuffer buf = new StringBuffer();
for (int i = 0; i < repeatCount; i++)
buf.append(selection);
clipboard.setContents(new StringSelection(buf.toString()),null);
}
}
public void paste()
{
if (editable)
{
Clipboard clipboard = getToolkit().getSystemClipboard();
try
{
// The MacOS MRJ doesn't convert \r to \n,
// so do it here
String selection = ((String) clipboard.getContents(this).getTransferData(
DataFlavor.stringFlavor)).replace('\r','\n');
int repeatCount = inputHandler.getRepeatCount();
StringBuffer buf = new StringBuffer();
for (int i = 0; i < repeatCount; i++)
buf.append(selection);
selection = buf.toString();
setSelectedText(selection);
}
catch (Exception e)
{
getToolkit().beep();
System.err.println("Clipboard does not" + " contain a string");
}
}
}
/**
* Called by the AWT when this component is removed from it's parent.
* This stops clears the currently focused component.
*/
public void removeNotify()
{
super.removeNotify();
if (focusedComponent == this) focusedComponent = null;
}
/**
* Forwards key events directly to the input handler.
* This is slightly faster than using a KeyListener
* because some Swing overhead is avoided.
*/
public void processKeyEvent(KeyEvent evt)
{
if (inputHandler == null) return;
switch (evt.getID())
{
case KeyEvent.KEY_TYPED:
inputHandler.keyTyped(evt);
break;
case KeyEvent.KEY_PRESSED:
inputHandler.keyPressed(evt);
break;
case KeyEvent.KEY_RELEASED:
inputHandler.keyReleased(evt);
break;
}
}
public int getLineWidth(int line)
{
Element e = document.getDefaultRootElement().getElement(line);
return offsetToX(line,e.getEndOffset() - e.getStartOffset() - 1) - horizontalOffset;
}
// protected members
protected static final String CENTER = "center";
protected static final String RIGHT = "right";
protected static final String BOTTOM = "bottom";
protected static JEditTextArea focusedComponent;
protected static Timer caretTimer;
protected TextAreaPainter painter;
protected JPopupMenu popup;
protected EventListenerList listenerList;
protected MutableCaretEvent caretEvent;
protected boolean caretVisible;
protected boolean blink;
protected int firstLine;
protected int visibleLines;
protected int horizontalOffset;
protected JScrollBar vertical;
protected JScrollBar horizontal;
protected boolean scrollBarsInitialized;
protected SyntaxDocument document;
protected DocumentHandler documentHandler;
protected Segment lineSegment;
protected int selectionStart;
protected int selectionStartLine;
protected int selectionEnd;
protected int selectionEndLine;
protected boolean biasLeft;
protected int bracketPosition;
protected int bracketLine;
protected boolean overwrite;
protected boolean rectSelect;
protected void fireCaretEvent()
{
Object[] listeners = listenerList.getListenerList();
for (int i = listeners.length - 2; i >= 0; i--)
{
if (listeners[i] == CaretListener.class)
{
((CaretListener) listeners[i + 1]).caretUpdate(caretEvent);
}
}
}
protected void updateBracketHighlight(int newCaretPosition)
{
if (newCaretPosition == 0)
{
bracketLine = -1;
bracketPosition = -1;
return;
}
try
{
int offset = TextUtilities.findMatchingBracket(document,newCaretPosition - 1);
if (offset != -1)
{
bracketLine = getLineOfOffset(offset);
bracketPosition = offset - getLineStartOffset(bracketLine);
return;
}
}
catch (BadLocationException bl)
{
bl.printStackTrace();
}
bracketPosition = -1;
bracketLine = -1;
}
protected void documentChanged(DocumentEvent evt)
{
DocumentEvent.ElementChange ch = evt.getChange(document.getDefaultRootElement());
int count;
if (ch == null)
count = 0;
else
count = ch.getChildrenAdded().length - ch.getChildrenRemoved().length;
int line = getLineOfOffset(evt.getOffset());
if (count == 0)
{
painter.invalidateLine(line);
}
// do magic stuff
else if (line < firstLine)
{
setFirstLine(firstLine + count);
}
// end of magic stuff
else
{
painter.invalidateLineRange(line,firstLine + visibleLines);
}
updateScrollBars();
}
class ScrollLayout implements LayoutManager
{
public void addLayoutComponent(String name, Component comp)
{
if (name.equals(CENTER))
center = comp;
else if (name.equals(RIGHT))
right = comp;
else if (name.equals(BOTTOM))
bottom = comp;
else if (name.equals(LEFT_OF_SCROLLBAR)) leftOfScrollBar.addElement(comp);
}
public void removeLayoutComponent(Component comp)
{
if (center == comp) center = null;
if (right == comp) right = null;
if (bottom == comp)
bottom = null;
else
leftOfScrollBar.removeElement(comp);
}
public Dimension preferredLayoutSize(Container parent)
{
Dimension dim = new Dimension();
Insets insets = getInsets();
dim.width = insets.left + insets.right;
dim.height = insets.top + insets.bottom;
Dimension centerPref = center.getPreferredSize();
dim.width += centerPref.width;
dim.height += centerPref.height;
Dimension rightPref = right.getPreferredSize();
dim.width += rightPref.width;
Dimension bottomPref = bottom.getPreferredSize();
dim.height += bottomPref.height;
return dim;
}
public Dimension minimumLayoutSize(Container parent)
{
Dimension dim = new Dimension();
Insets insets = getInsets();
dim.width = insets.left + insets.right;
dim.height = insets.top + insets.bottom;
Dimension centerPref = center.getMinimumSize();
dim.width += centerPref.width;
dim.height += centerPref.height;
Dimension rightPref = right.getMinimumSize();
dim.width += rightPref.width;
Dimension bottomPref = bottom.getMinimumSize();
dim.height += bottomPref.height;
return dim;
}
public void layoutContainer(Container parent)
{
Dimension size = parent.getSize();
Insets insets = parent.getInsets();
int itop = insets.top;
int ileft = insets.left;
int ibottom = insets.bottom;
int iright = insets.right;
int rightWidth = right.getPreferredSize().width;
int bottomHeight = bottom.getPreferredSize().height;
int centerWidth = size.width - rightWidth - ileft - iright;
int centerHeight = size.height - bottomHeight - itop - ibottom;
center.setBounds(ileft,itop,centerWidth,centerHeight);
right.setBounds(ileft + centerWidth,itop,rightWidth,centerHeight);
// Lay out all status components, in order
Enumeration<Component> status = leftOfScrollBar.elements();
while (status.hasMoreElements())
{
Component comp = status.nextElement();
Dimension dim = comp.getPreferredSize();
comp.setBounds(ileft,itop + centerHeight,dim.width,bottomHeight);
ileft += dim.width;
}
bottom.setBounds(ileft,itop + centerHeight,size.width - rightWidth - ileft - iright,
bottomHeight);
}
// private members
private Component center;
private Component right;
private Component bottom;
private Vector<Component> leftOfScrollBar = new Vector<Component>();
}
static class CaretBlinker implements ActionListener
{
public void actionPerformed(ActionEvent evt)
{
if (focusedComponent != null && focusedComponent.hasFocus()) focusedComponent.blinkCaret();
}
}
class MutableCaretEvent extends CaretEvent
{
private static final long serialVersionUID = 1L;
MutableCaretEvent()
{
super(JEditTextArea.this);
}
public int getDot()
{
return getCaretPosition();
}
public int getMark()
{
return getMarkPosition();
}
}
class AdjustHandler implements AdjustmentListener
{
public void adjustmentValueChanged(final AdjustmentEvent evt)
{
if (!scrollBarsInitialized) return;
// If this is not done, mousePressed events accumilate
// and the result is that scrolling doesn't stop after
// the mouse is released
SwingUtilities.invokeLater(new Runnable()
{
public void run()
{
if (evt.getAdjustable() == vertical)
setFirstLine(vertical.getValue());
else
setHorizontalOffset(-horizontal.getValue());
}
});
}
}
class ComponentHandler extends ComponentAdapter
{
public void componentResized(ComponentEvent evt)
{
recalculateVisibleLines();
scrollBarsInitialized = true;
}
}
protected int widestLine = 0;
protected int widestLineWidth = 0;
class DocumentHandler implements DocumentListener
{
public void insertUpdate(DocumentEvent evt)
{
Element re = document.getDefaultRootElement();
DocumentEvent.ElementChange ch = evt.getChange(re);
if (ch != null)
{
int i = ch.getIndex();
Element[] ca = ch.getChildrenAdded();
Element[] cr = ch.getChildrenRemoved();
if (widestLine > i + cr.length)
{
widestLine += ca.length - cr.length;
findWidestLine(i,i + ca.length);
}
else if (widestLine >= i)
{
widestLine = -1;
int pwlw = widestLineWidth;
widestLineWidth = -1;
findWidestLine(i,i + ca.length);
if (widestLineWidth < pwlw)
{
findWidestLine(0,i);
findWidestLine(i + ca.length,re.getElementCount());
}
}
else
findWidestLine(i,i + ca.length);
}
else
{
int pos = evt.getOffset();
int line = re.getElementIndex(pos);
int lineWidth = getLineWidth(line);
if (widestLine == line)
widestLineWidth = lineWidth;
else if (lineWidth > widestLineWidth)
{
widestLine = line;
widestLineWidth = lineWidth;
}
}
documentChanged(evt);
int offset = evt.getOffset();
int length = evt.getLength();
int newStart;
int newEnd;
if (selectionStart > offset || (selectionStart == selectionEnd && selectionStart == offset))
newStart = selectionStart + length;
else
newStart = selectionStart;
if (selectionEnd >= offset)
newEnd = selectionEnd + length;
else
newEnd = selectionEnd;
select(newStart,newEnd);
}
public void removeUpdate(DocumentEvent evt)
{
Element re = document.getDefaultRootElement();
DocumentEvent.ElementChange ch = evt.getChange(re);
if (ch != null)
{
int i = ch.getIndex();
Element[] cr = ch.getChildrenRemoved();
if (widestLine > i + cr.length)
widestLine -= cr.length;
else if (widestLine >= i)
{
widestLine = -1;
widestLineWidth = -1;
findWidestLine();
}
}
else
{
int pos = evt.getOffset();
int line = re.getElementIndex(pos);
if (widestLine == line)
{
widestLineWidth = getLineWidth(line);
findWidestLine();
}
}
documentChanged(evt);
int offset = evt.getOffset();
int length = evt.getLength();
int newStart;
int newEnd;
if (selectionStart > offset)
{
if (selectionStart > offset + length)
newStart = selectionStart - length;
else
newStart = offset;
}
else
newStart = selectionStart;
if (selectionEnd > offset)
{
if (selectionEnd > offset + length)
newEnd = selectionEnd - length;
else
newEnd = offset;
}
else
newEnd = selectionEnd;
select(newStart,newEnd);
}
public void changedUpdate(DocumentEvent evt)
{
}
protected void findWidestLine()
{
Element re = document.getDefaultRootElement();
findWidestLine(0,re.getElementCount());
}
protected void findWidestLine(int from, int to)
{
for (int i = from; i < to; i++)
{
int w = getLineWidth(i);
if (w >= widestLineWidth)
{
widestLine = i;
widestLineWidth = w;
}
}
}
}
class DragHandler implements MouseMotionListener
{
public void mouseDragged(MouseEvent evt)
{
if (popup != null && popup.isVisible()) return;
setSelectionRectangular((evt.getModifiers() & InputEvent.CTRL_MASK) != 0);
select(getMarkPosition(),xyToOffset(evt.getX(),evt.getY()));
}
public void mouseMoved(MouseEvent evt)
{
}
}
class FocusHandler implements FocusListener
{
public void focusGained(FocusEvent evt)
{
setCaretVisible(true);
focusedComponent = JEditTextArea.this;
}
public void focusLost(FocusEvent evt)
{
setCaretVisible(false);
focusedComponent = null;
}
}
class MouseHandler extends MouseAdapter
{
public void mousePressed(MouseEvent evt)
{
requestFocus();
// Focus events not fired sometimes?
setCaretVisible(true);
focusedComponent = JEditTextArea.this;
if (evt.getModifiers() == 0) return;
if ((evt.getModifiers() & InputEvent.BUTTON3_MASK) != 0 && popup != null)
{
popup.show(painter,evt.getX(),evt.getY());
return;
}
int line = yToLine(evt.getY());
int offset = xToOffset(line,evt.getX());
int dot = getLineStartOffset(line) + offset;
switch (evt.getClickCount())
{
case 1:
doSingleClick(evt,dot);
break;
case 2:
doDoubleClick(line,offset,dot);
break;
case 3:
doTripleClick(line);
break;
}
}
private void doSingleClick(MouseEvent evt, int dot)
{
if ((evt.getModifiers() & InputEvent.SHIFT_MASK) != 0)
{
rectSelect = (evt.getModifiers() & InputEvent.CTRL_MASK) != 0;
select(getMarkPosition(),dot);
}
else
setCaretPosition(dot);
}
private void doDoubleClick(int line, int offset, int dot)
{
// Ignore empty lines
if (getLineLength(line) == 0) return;
try
{
int bracket = TextUtilities.findMatchingBracket(document,Math.max(0,dot - 1));
if (bracket != -1)
{
int mark = getMarkPosition();
// Hack
if (bracket > mark)
{
bracket++;
mark--;
}
select(mark,bracket);
return;
}
}
catch (BadLocationException bl)
{
bl.printStackTrace();
}
// Ok, it's not a bracket... select the word
String lineText = getLineText(line);
char ch = lineText.charAt(Math.max(0,offset - 1));
String noWordSep = (String) document.getProperty("noWordSep");
if (noWordSep == null) noWordSep = "";
// If the user clicked on a non-letter char,
// we select the surrounding non-letters
boolean selectNoLetter = (!Character.isLetterOrDigit(ch) && noWordSep.indexOf(ch) == -1);
int wordStart = 0;
for (int i = offset - 1; i >= 0; i--)
{
ch = lineText.charAt(i);
if (selectNoLetter ^ (!Character.isLetterOrDigit(ch) && noWordSep.indexOf(ch) == -1))
{
wordStart = i + 1;
break;
}
}
int wordEnd = lineText.length();
for (int i = offset; i < lineText.length(); i++)
{
ch = lineText.charAt(i);
if (selectNoLetter ^ (!Character.isLetterOrDigit(ch) && noWordSep.indexOf(ch) == -1))
{
wordEnd = i;
break;
}
}
int lineStart = getLineStartOffset(line);
select(lineStart + wordStart,lineStart + wordEnd);
/*
String lineText = getLineText(line);
String noWordSep = (String)document.getProperty("noWordSep");
int wordStart = TextUtilities.findWordStart(lineText,offset,noWordSep);
int wordEnd = TextUtilities.findWordEnd(lineText,offset,noWordSep);
int lineStart = getLineStartOffset(line);
select(lineStart + wordStart,lineStart + wordEnd);
*/
}
private void doTripleClick(int line)
{
select(getLineStartOffset(line),getLineEndOffset(line) - 1);
}
}
class CaretUndo extends AbstractUndoableEdit
{
private static final long serialVersionUID = 1L;
private int start;
private int end;
CaretUndo(int start, int end)
{
this.start = start;
this.end = end;
}
public boolean isSignificant()
{
return false;
}
public String getPresentationName()
{
return "caret move";
}
public void undo()
{
super.undo();
select(start,end);
}
public void redo()
{
super.redo();
select(start,end);
}
public boolean addEdit(UndoableEdit edit)
{
if (edit instanceof CaretUndo)
{
CaretUndo cedit = (CaretUndo) edit;
start = cedit.start;
end = cedit.end;
cedit.die();
return true;
}
return false;
}
}
static
{
caretTimer = new Timer(500,new CaretBlinker());
caretTimer.setInitialDelay(500);
caretTimer.start();
}
}