svn-gvsig-desktop / tags / v1_0_2_Build_910 / libraries / libIverUtiles / src / com / iver / utiles / console / jedit / TextAreaPainter.java @ 11275
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package com.iver.utiles.console.jedit; |
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/*
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* TextAreaPainter.java - Paints the text area
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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.Color; |
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import java.awt.Cursor; |
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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.Graphics; |
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import java.awt.Rectangle; |
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import java.awt.Toolkit; |
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import java.awt.event.MouseEvent; |
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import javax.swing.JComponent; |
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import javax.swing.ToolTipManager; |
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import javax.swing.text.PlainDocument; |
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import javax.swing.text.Segment; |
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import javax.swing.text.TabExpander; |
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import javax.swing.text.Utilities; |
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/**
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* The text area repaint manager. It performs double buffering and paints
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* lines of text.
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* @author Slava Pestov
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* @version $Id$
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*/
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public class TextAreaPainter extends JComponent implements TabExpander |
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{
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/**
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* Creates a new repaint manager. This should be not be called
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* directly.
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*/
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public TextAreaPainter(JEditTextArea textArea, TextAreaDefaults defaults)
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{
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this.textArea = textArea;
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setAutoscrolls(true);
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setDoubleBuffered(true);
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setOpaque(true);
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ToolTipManager.sharedInstance().registerComponent(this); |
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currentLine = new Segment(); |
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currentLineIndex = -1;
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setCursor(Cursor.getPredefinedCursor(Cursor.TEXT_CURSOR)); |
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setFont(new Font("Monospaced",Font.PLAIN,14)); |
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setForeground(Color.black);
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setBackground(Color.white);
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blockCaret = defaults.blockCaret; |
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styles = defaults.styles; |
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cols = defaults.cols; |
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rows = defaults.rows; |
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caretColor = defaults.caretColor; |
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selectionColor = defaults.selectionColor; |
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lineHighlightColor = defaults.lineHighlightColor; |
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lineHighlight = defaults.lineHighlight; |
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bracketHighlightColor = defaults.bracketHighlightColor; |
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bracketHighlight = defaults.bracketHighlight; |
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paintInvalid = defaults.paintInvalid; |
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eolMarkerColor = defaults.eolMarkerColor; |
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eolMarkers = defaults.eolMarkers; |
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} |
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/**
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* Returns if this component can be traversed by pressing the
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* 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 false; |
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} |
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/**
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* Returns the syntax styles used to paint colorized text. Entry <i>n</i>
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* will be used to paint tokens with id = <i>n</i>.
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* @see org.gjt.sp.jedit.syntax.Token
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*/
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public final SyntaxStyle[] getStyles() |
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{
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return styles;
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} |
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/**
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* Sets the syntax styles used to paint colorized text. Entry <i>n</i>
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* will be used to paint tokens with id = <i>n</i>.
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* @param styles The syntax styles
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* @see org.gjt.sp.jedit.syntax.Token
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*/
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public final void setStyles(SyntaxStyle[] styles) |
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{
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this.styles = styles;
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repaint(); |
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} |
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/**
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* Returns the caret color.
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*/
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public final Color getCaretColor() |
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{
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return caretColor;
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} |
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/**
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* Sets the caret color.
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* @param caretColor The caret color
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*/
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public final void setCaretColor(Color caretColor) |
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{
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this.caretColor = caretColor;
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invalidateSelectedLines(); |
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} |
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/**
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* Returns the selection color.
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*/
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public final Color getSelectionColor() |
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{
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return selectionColor;
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} |
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/**
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* Sets the selection color.
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* @param selectionColor The selection color
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*/
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public final void setSelectionColor(Color selectionColor) |
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{
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this.selectionColor = selectionColor;
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invalidateSelectedLines(); |
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} |
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/**
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* Returns the line highlight color.
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*/
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public final Color getLineHighlightColor() |
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{
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return lineHighlightColor;
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} |
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/**
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* Sets the line highlight color.
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* @param lineHighlightColor The line highlight color
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*/
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public final void setLineHighlightColor(Color lineHighlightColor) |
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{
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this.lineHighlightColor = lineHighlightColor;
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invalidateSelectedLines(); |
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} |
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/**
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* Returns true if line highlight is enabled, false otherwise.
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*/
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public final boolean isLineHighlightEnabled() |
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{
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return lineHighlight;
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} |
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/**
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* Enables or disables current line highlighting.
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* @param lineHighlight True if current line highlight should be enabled,
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* false otherwise
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*/
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public final void setLineHighlightEnabled(boolean lineHighlight) |
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{
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this.lineHighlight = lineHighlight;
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invalidateSelectedLines(); |
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} |
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/**
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* Returns the bracket highlight color.
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*/
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public final Color getBracketHighlightColor() |
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{
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return bracketHighlightColor;
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} |
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/**
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* Sets the bracket highlight color.
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* @param bracketHighlightColor The bracket highlight color
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*/
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public final void setBracketHighlightColor(Color bracketHighlightColor) |
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{
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this.bracketHighlightColor = bracketHighlightColor;
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invalidateLine(textArea.getBracketLine()); |
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} |
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/**
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* Returns true if bracket highlighting is enabled, false otherwise.
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* When bracket highlighting is enabled, the bracket matching the
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* one before the caret (if any) is highlighted.
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*/
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public final boolean isBracketHighlightEnabled() |
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{
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return bracketHighlight;
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} |
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/**
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* Enables or disables bracket highlighting.
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* When bracket highlighting is enabled, the bracket matching the
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* one before the caret (if any) is highlighted.
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* @param bracketHighlight True if bracket highlighting should be
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* enabled, false otherwise
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*/
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public final void setBracketHighlightEnabled(boolean bracketHighlight) |
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{
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this.bracketHighlight = bracketHighlight;
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invalidateLine(textArea.getBracketLine()); |
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} |
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/**
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* Returns true if the caret should be drawn as a block, false otherwise.
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*/
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public final boolean isBlockCaretEnabled() |
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{
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return blockCaret;
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} |
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/**
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* Sets if the caret should be drawn as a block, false otherwise.
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* @param blockCaret True if the caret should be drawn as a block,
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* false otherwise.
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*/
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public final void setBlockCaretEnabled(boolean blockCaret) |
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{
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this.blockCaret = blockCaret;
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invalidateSelectedLines(); |
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} |
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/**
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* Returns the EOL marker color.
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*/
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public final Color getEOLMarkerColor() |
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{
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return eolMarkerColor;
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} |
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/**
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* Sets the EOL marker color.
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* @param eolMarkerColor The EOL marker color
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*/
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public final void setEOLMarkerColor(Color eolMarkerColor) |
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{
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this.eolMarkerColor = eolMarkerColor;
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repaint(); |
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} |
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/**
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* Returns true if EOL markers are drawn, false otherwise.
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*/
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public final boolean getEOLMarkersPainted() |
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{
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return eolMarkers;
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} |
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/**
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* Sets if EOL markers are to be drawn.
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* @param eolMarkers True if EOL markers should be drawn, false otherwise
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*/
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public final void setEOLMarkersPainted(boolean eolMarkers) |
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{
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this.eolMarkers = eolMarkers;
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repaint(); |
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} |
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/**
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* Returns true if invalid lines are painted as red tildes (~),
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* false otherwise.
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*/
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public boolean getInvalidLinesPainted() |
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{
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return paintInvalid;
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} |
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/**
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* Sets if invalid lines are to be painted as red tildes.
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* @param paintInvalid True if invalid lines should be drawn, false otherwise
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*/
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public void setInvalidLinesPainted(boolean paintInvalid) |
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{
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this.paintInvalid = paintInvalid;
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} |
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/**
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* Adds a custom highlight painter.
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* @param highlight The highlight
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*/
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public void addCustomHighlight(Highlight highlight) |
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{
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highlight.init(textArea,highlights); |
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highlights = highlight; |
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} |
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/**
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* Highlight interface.
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*/
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public interface Highlight |
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{
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/**
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* Called after the highlight painter has been added.
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* @param textArea The text area
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* @param next The painter this one should delegate to
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*/
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void init(JEditTextArea textArea, Highlight next);
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/**
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* This should paint the highlight and delgate to the
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* next highlight painter.
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* @param gfx The graphics context
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* @param line The line number
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* @param y The y co-ordinate of the line
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*/
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void paintHighlight(Graphics gfx, int line, int y); |
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/**
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* Returns the tool tip to display at the specified
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* location. If this highlighter doesn't know what to
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* display, it should delegate to the next highlight
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* painter.
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* @param evt The mouse event
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*/
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String getToolTipText(MouseEvent evt); |
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} |
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/**
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* Returns the tool tip to display at the specified location.
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* @param evt The mouse event
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*/
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public String getToolTipText(MouseEvent evt) |
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{
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if(highlights != null) |
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return highlights.getToolTipText(evt);
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else
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return null; |
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} |
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/**
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* Returns the font metrics used by this component.
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*/
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public FontMetrics getFontMetrics() |
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{
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return fm;
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} |
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/**
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* Sets the font for this component. This is overridden to update the
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* cached font metrics and to recalculate which lines are visible.
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* @param font The font
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*/
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public void setFont(Font font) |
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{
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super.setFont(font);
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fm = Toolkit.getDefaultToolkit().getFontMetrics(font);
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textArea.recalculateVisibleLines(); |
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} |
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/**
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* Repaints the text.
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* @param g The graphics context
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*/
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public void paint(Graphics gfx) |
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{
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tabSize = fm.charWidth(' ') * ((Integer)textArea |
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.getDocument().getProperty( |
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PlainDocument.tabSizeAttribute)).intValue();
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Rectangle clipRect = gfx.getClipBounds();
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gfx.setColor(getBackground()); |
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gfx.fillRect(clipRect.x,clipRect.y,clipRect.width,clipRect.height); |
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// We don't use yToLine() here because that method doesn't
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// return lines past the end of the document
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int height = fm.getHeight();
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int firstLine = textArea.getFirstLine();
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int firstInvalid = firstLine + clipRect.y / height;
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// Because the clipRect's height is usually an even multiple
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// of the font height, we subtract 1 from it, otherwise one
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// too many lines will always be painted.
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int lastInvalid = firstLine + (clipRect.y + clipRect.height - 1) / height; |
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try
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{
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TokenMarker tokenMarker = ((SyntaxDocument)textArea.getDocument()) |
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.getTokenMarker(); |
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int x = textArea.getHorizontalOffset();
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for(int line = firstInvalid; line <= lastInvalid; line++) |
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{
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paintLine(gfx,tokenMarker,line,x); |
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} |
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if(tokenMarker != null && tokenMarker.isNextLineRequested()) |
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{
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int h = clipRect.y + clipRect.height;
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repaint(0,h,getWidth(),getHeight() - h);
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} |
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} |
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catch(Exception e) |
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{
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System.err.println("Error repainting line" |
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+ " range {" + firstInvalid + "," |
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+ lastInvalid + "}:");
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e.printStackTrace(); |
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} |
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} |
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/**
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* Marks a line as needing a repaint.
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* @param line The line to invalidate
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*/
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public final void invalidateLine(int line) |
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{
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repaint(0,textArea.lineToY(line) + fm.getMaxDescent() + fm.getLeading(),
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getWidth(),fm.getHeight()); |
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} |
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/**
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* Marks a range of lines as needing a repaint.
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* @param firstLine The first line to invalidate
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* @param lastLine The last line to invalidate
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*/
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public final void invalidateLineRange(int firstLine, int lastLine) |
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{
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repaint(0,textArea.lineToY(firstLine) + fm.getMaxDescent() + fm.getLeading(),
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getWidth(),(lastLine - firstLine + 1) * fm.getHeight());
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} |
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/**
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* Repaints the lines containing the selection.
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*/
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public final void invalidateSelectedLines() |
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{
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invalidateLineRange(textArea.getSelectionStartLine(), |
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textArea.getSelectionEndLine()); |
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} |
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/**
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* Implementation of TabExpander interface. Returns next tab stop after
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* a specified point.
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* @param x The x co-ordinate
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* @param tabOffset Ignored
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* @return The next tab stop after <i>x</i>
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*/
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public float nextTabStop(float x, int tabOffset) |
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{
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int offset = textArea.getHorizontalOffset();
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int ntabs = ((int)x - offset) / tabSize; |
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return (ntabs + 1) * tabSize + offset; |
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} |
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/**
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* Returns the painter's preferred size.
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*/
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public Dimension getPreferredSize() |
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{
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Dimension dim = new Dimension(); |
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dim.width = fm.charWidth('w') * cols;
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dim.height = fm.getHeight() * rows; |
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return dim;
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} |
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/**
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* Returns the painter's minimum size.
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*/
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public Dimension getMinimumSize() |
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{
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return getPreferredSize();
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} |
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// package-private members
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int currentLineIndex;
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Token currentLineTokens; |
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Segment currentLine;
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// protected members
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protected JEditTextArea textArea;
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protected SyntaxStyle[] styles; |
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protected Color caretColor; |
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protected Color selectionColor; |
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protected Color lineHighlightColor; |
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protected Color bracketHighlightColor; |
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protected Color eolMarkerColor; |
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protected boolean blockCaret; |
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protected boolean lineHighlight; |
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protected boolean bracketHighlight; |
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protected boolean paintInvalid; |
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protected boolean eolMarkers; |
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protected int cols; |
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protected int rows; |
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protected int tabSize; |
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protected FontMetrics fm; |
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protected Highlight highlights;
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protected void paintLine(Graphics gfx, TokenMarker tokenMarker, |
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int line, int x) |
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{
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Font defaultFont = getFont();
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Color defaultColor = getForeground();
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currentLineIndex = line; |
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int y = textArea.lineToY(line);
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if(line < 0 || line >= textArea.getLineCount()) |
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{
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if(paintInvalid)
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{
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paintHighlight(gfx,line,y); |
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styles[Token.INVALID].setGraphicsFlags(gfx,defaultFont); |
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gfx.drawString("~",0,y + fm.getHeight()); |
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} |
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} |
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else if(tokenMarker == null) |
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{
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paintPlainLine(gfx,line,defaultFont,defaultColor,x,y); |
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} |
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else
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{
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paintSyntaxLine(gfx,tokenMarker,line,defaultFont, |
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defaultColor,x,y); |
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} |
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} |
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protected void paintPlainLine(Graphics gfx, int line, Font defaultFont, |
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Color defaultColor, int x, int y) |
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{
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paintHighlight(gfx,line,y); |
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textArea.getLineText(line,currentLine); |
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gfx.setFont(defaultFont); |
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gfx.setColor(defaultColor); |
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y += fm.getHeight(); |
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x = Utilities.drawTabbedText(currentLine,x,y,gfx,this,0); |
| 548 |
|
| 549 |
if(eolMarkers)
|
| 550 |
{
|
| 551 |
gfx.setColor(eolMarkerColor); |
| 552 |
gfx.drawString(".",x,y);
|
| 553 |
} |
| 554 |
} |
| 555 |
|
| 556 |
protected void paintSyntaxLine(Graphics gfx, TokenMarker tokenMarker, |
| 557 |
int line, Font defaultFont, Color defaultColor, int x, int y) |
| 558 |
{
|
| 559 |
textArea.getLineText(currentLineIndex,currentLine); |
| 560 |
currentLineTokens = tokenMarker.markTokens(currentLine, |
| 561 |
currentLineIndex); |
| 562 |
|
| 563 |
paintHighlight(gfx,line,y); |
| 564 |
|
| 565 |
gfx.setFont(defaultFont); |
| 566 |
gfx.setColor(defaultColor); |
| 567 |
y += fm.getHeight(); |
| 568 |
x = SyntaxUtilities.paintSyntaxLine(currentLine, |
| 569 |
currentLineTokens,styles,this,gfx,x,y);
|
| 570 |
|
| 571 |
if(eolMarkers)
|
| 572 |
{
|
| 573 |
gfx.setColor(eolMarkerColor); |
| 574 |
gfx.drawString(".",x,y);
|
| 575 |
} |
| 576 |
} |
| 577 |
|
| 578 |
protected void paintHighlight(Graphics gfx, int line, int y) |
| 579 |
{
|
| 580 |
if(line >= textArea.getSelectionStartLine()
|
| 581 |
&& line <= textArea.getSelectionEndLine()) |
| 582 |
paintLineHighlight(gfx,line,y); |
| 583 |
|
| 584 |
if(highlights != null) |
| 585 |
highlights.paintHighlight(gfx,line,y); |
| 586 |
|
| 587 |
if(bracketHighlight && line == textArea.getBracketLine())
|
| 588 |
paintBracketHighlight(gfx,line,y); |
| 589 |
|
| 590 |
if(line == textArea.getCaretLine())
|
| 591 |
paintCaret(gfx,line,y); |
| 592 |
} |
| 593 |
|
| 594 |
protected void paintLineHighlight(Graphics gfx, int line, int y) |
| 595 |
{
|
| 596 |
int height = fm.getHeight();
|
| 597 |
y += fm.getLeading() + fm.getMaxDescent(); |
| 598 |
|
| 599 |
int selectionStart = textArea.getSelectionStart();
|
| 600 |
int selectionEnd = textArea.getSelectionEnd();
|
| 601 |
|
| 602 |
if(selectionStart == selectionEnd)
|
| 603 |
{
|
| 604 |
if(lineHighlight)
|
| 605 |
{
|
| 606 |
gfx.setColor(lineHighlightColor); |
| 607 |
gfx.fillRect(0,y,getWidth(),height);
|
| 608 |
} |
| 609 |
} |
| 610 |
else
|
| 611 |
{
|
| 612 |
gfx.setColor(selectionColor); |
| 613 |
|
| 614 |
int selectionStartLine = textArea.getSelectionStartLine();
|
| 615 |
int selectionEndLine = textArea.getSelectionEndLine();
|
| 616 |
int lineStart = textArea.getLineStartOffset(line);
|
| 617 |
|
| 618 |
int x1, x2;
|
| 619 |
if(textArea.isSelectionRectangular())
|
| 620 |
{
|
| 621 |
int lineLen = textArea.getLineLength(line);
|
| 622 |
x1 = textArea._offsetToX(line,Math.min(lineLen,
|
| 623 |
selectionStart - textArea.getLineStartOffset( |
| 624 |
selectionStartLine))); |
| 625 |
x2 = textArea._offsetToX(line,Math.min(lineLen,
|
| 626 |
selectionEnd - textArea.getLineStartOffset( |
| 627 |
selectionEndLine))); |
| 628 |
if(x1 == x2)
|
| 629 |
x2++; |
| 630 |
} |
| 631 |
else if(selectionStartLine == selectionEndLine) |
| 632 |
{
|
| 633 |
x1 = textArea._offsetToX(line, |
| 634 |
selectionStart - lineStart); |
| 635 |
x2 = textArea._offsetToX(line, |
| 636 |
selectionEnd - lineStart); |
| 637 |
} |
| 638 |
else if(line == selectionStartLine) |
| 639 |
{
|
| 640 |
x1 = textArea._offsetToX(line, |
| 641 |
selectionStart - lineStart); |
| 642 |
x2 = getWidth(); |
| 643 |
} |
| 644 |
else if(line == selectionEndLine) |
| 645 |
{
|
| 646 |
x1 = 0;
|
| 647 |
x2 = textArea._offsetToX(line, |
| 648 |
selectionEnd - lineStart); |
| 649 |
} |
| 650 |
else
|
| 651 |
{
|
| 652 |
x1 = 0;
|
| 653 |
x2 = getWidth(); |
| 654 |
} |
| 655 |
|
| 656 |
// "inlined" min/max()
|
| 657 |
gfx.fillRect(x1 > x2 ? x2 : x1,y,x1 > x2 ? |
| 658 |
(x1 - x2) : (x2 - x1),height); |
| 659 |
} |
| 660 |
|
| 661 |
} |
| 662 |
|
| 663 |
protected void paintBracketHighlight(Graphics gfx, int line, int y) |
| 664 |
{
|
| 665 |
int position = textArea.getBracketPosition();
|
| 666 |
if(position == -1) |
| 667 |
return;
|
| 668 |
y += fm.getLeading() + fm.getMaxDescent(); |
| 669 |
int x = textArea._offsetToX(line,position);
|
| 670 |
gfx.setColor(bracketHighlightColor); |
| 671 |
// Hack!!! Since there is no fast way to get the character
|
| 672 |
// from the bracket matching routine, we use ( since all
|
| 673 |
// brackets probably have the same width anyway
|
| 674 |
gfx.drawRect(x,y,fm.charWidth('(') - 1, |
| 675 |
fm.getHeight() - 1);
|
| 676 |
} |
| 677 |
|
| 678 |
protected void paintCaret(Graphics gfx, int line, int y) |
| 679 |
{
|
| 680 |
if(textArea.isCaretVisible())
|
| 681 |
{
|
| 682 |
int offset = textArea.getCaretPosition()
|
| 683 |
- textArea.getLineStartOffset(line); |
| 684 |
int caretX = textArea._offsetToX(line,offset);
|
| 685 |
int caretWidth = ((blockCaret ||
|
| 686 |
textArea.isOverwriteEnabled()) ? |
| 687 |
fm.charWidth('w') : 1); |
| 688 |
y += fm.getLeading() + fm.getMaxDescent(); |
| 689 |
int height = fm.getHeight();
|
| 690 |
|
| 691 |
gfx.setColor(caretColor); |
| 692 |
|
| 693 |
if(textArea.isOverwriteEnabled())
|
| 694 |
{
|
| 695 |
gfx.fillRect(caretX,y + height - 1,
|
| 696 |
caretWidth,1);
|
| 697 |
} |
| 698 |
else
|
| 699 |
{
|
| 700 |
gfx.drawRect(caretX,y,caretWidth - 1,height - 1); |
| 701 |
} |
| 702 |
} |
| 703 |
} |
| 704 |
} |