de.hunsicker.jalopy.swing.syntax
Class SyntaxView

java.lang.Object
  |
  +--javax.swing.text.View
        |
        +--javax.swing.text.PlainView
              |
              +--de.hunsicker.jalopy.swing.syntax.SyntaxView

All Implemented Interfaces:

javax.swing.SwingConstants, javax.swing.text.TabExpander

public final class SyntaxView

extends javax.swing.text.PlainView

A Swing view implementation that colorizes lines of a SyntaxDocument using a TokenMarker. This class should not be used directly; a SyntaxEditorKit should be used instead.

Version:

$Id: SyntaxView.java,v 1.3.2.2 2005/02/18 21:50:20 notzippy Exp $

Author:

Slava Pestov, Bruce Quig, Michael Kolling

Field Summary

Fields inherited from class javax.swing.text.PlainView

metrics

Fields inherited from class javax.swing.text.View

BadBreakWeight, ExcellentBreakWeight, ForcedBreakWeight, GoodBreakWeight, X_AXIS, Y_AXIS

Fields inherited from interface javax.swing.SwingConstants

BOTTOM, CENTER, EAST, HORIZONTAL, LEADING, LEFT, NEXT, NORTH, NORTH_EAST, NORTH_WEST, PREVIOUS, RIGHT, SOUTH, SOUTH_EAST, SOUTH_WEST, TOP, TRAILING, VERTICAL, WEST

Constructor Summary

SyntaxView(javax.swing.text.Element elem)
Creates a new SyntaxView for painting the specified element.

Method Summary

void	drawLine(int lineIndex, java.awt.Graphics g, int x, int y) Paints the specified line.
protected java.awt.Color	getDefaultColor() Return default foreground colour
java.awt.Rectangle	lineToRect(java.awt.Shape a, int aline) redefined from PlainView private method to allow for redefinition of modelToView method
java.awt.Shape	modelToView(int pos, java.awt.Shape a, javax.swing.text.Position.Bias b) Provides a mapping from the document model coordinate space to the coordinate space of the view mapped to it.
float	nextTabStop(float x, int tabOffset) Returns the next tab stop position after a given reference position.
int	viewToModel(float fx, float fy, java.awt.Shape a, javax.swing.text.Position.Bias[] bias) Provides a mapping from the view coordinate space to the logical coordinate space of the model.

Methods inherited from class javax.swing.text.PlainView

changedUpdate, damageLineRange, drawSelectedText, drawUnselectedText, getLineBuffer, getPreferredSpan, getTabSize, insertUpdate, paint, removeUpdate, setSize, updateDamage, updateMetrics

Methods inherited from class javax.swing.text.View

append, breakView, createFragment, forwardUpdate, forwardUpdateToView, getAlignment, getAttributes, getBreakWeight, getChildAllocation, getContainer, getDocument, getElement, getEndOffset, getGraphics, getMaximumSpan, getMinimumSpan, getNextVisualPositionFrom, getParent, getResizeWeight, getStartOffset, getToolTipText, getView, getViewCount, getViewFactory, getViewIndex, getViewIndex, insert, isVisible, modelToView, modelToView, preferenceChanged, remove, removeAll, replace, setParent, updateChildren, updateLayout, viewToModel

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

SyntaxView

public SyntaxView(javax.swing.text.Element elem)

Creates a new SyntaxView for painting the specified element.

Parameters:

elem - The element

Method Detail

drawLine

public void drawLine(int lineIndex,
                     java.awt.Graphics g,
                     int x,
                     int y)

Paints the specified line. This method performs the following: - Gets the token marker and color table from the current document, typecast to a SyntaxDocument. - Tokenizes the required line by calling the markTokens() method of the token marker. - Paints each token, obtaining the color by looking up the the Token.id value in the color table. If either the document doesn't implement SyntaxDocument, or if the returned token marker is null, the line will be painted with no colorization. Currently, we assume that the whole document uses the same font. To support font changes, some of the code from "initilise" needs to be here to be done repeatedly for each line.

Overrides:

drawLine in class javax.swing.text.PlainView

Parameters:

lineIndex - The line number

g - The graphics context

x - The x co-ordinate where the line should be painted

y - The y co-ordinate where the line should be painted

lineToRect

public java.awt.Rectangle lineToRect(java.awt.Shape a,
                                     int aline)

redefined from PlainView private method to allow for redefinition of modelToView method

Overrides:

lineToRect in class javax.swing.text.PlainView

Parameters:

a - DOCUMENT ME!

aline - DOCUMENT ME!

Returns:

DOCUMENT ME!

modelToView

public java.awt.Shape modelToView(int pos,
                                  java.awt.Shape a,
                                  javax.swing.text.Position.Bias b)
                           throws javax.swing.text.BadLocationException

Provides a mapping from the document model coordinate space to the coordinate space of the view mapped to it. This is a redefined method from PlainView that adds an offset for the view to allow for a breakpoint area in the associated editor.

Overrides:

modelToView in class javax.swing.text.PlainView

Parameters:

pos - the position to convert >= 0

a - the allocated region to render into

b - DOCUMENT ME!

Returns:

the bounding box of the given position

Throws:

javax.swing.text.BadLocationException - if the given position does not represent a valid location in the associated document

See Also:

View#modelToView

nextTabStop

public float nextTabStop(float x,
                         int tabOffset)

Returns the next tab stop position after a given reference position. This implementation does not support things like centering so it ignores the tabOffset argument.

Specified by:

nextTabStop in interface javax.swing.text.TabExpander

Overrides:

nextTabStop in class javax.swing.text.PlainView

Parameters:

x - the current position >= 0

tabOffset - the position within the text stream that the tab occurred at >= 0.

Returns:

the tab stop, measured in points >= 0

viewToModel

public int viewToModel(float fx,
                       float fy,
                       java.awt.Shape a,
                       javax.swing.text.Position.Bias[] bias)

Provides a mapping from the view coordinate space to the logical coordinate space of the model.

Overrides:

viewToModel in class javax.swing.text.PlainView

Parameters:

fx - the X coordinate >= 0

fy - the Y coordinate >= 0

a - the allocated region to render into

bias - DOCUMENT ME!

Returns:

the location within the model that best represents the given point in the view >= 0

See Also:

View#viewToModel

getDefaultColor

protected java.awt.Color getDefaultColor()

Return default foreground colour

Returns:

DOCUMENT ME!