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/*
* {{{ header & license
* Copyright (c) 2004, 2005 Joshua Marinacci
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public License
* as published by the Free Software Foundation; either version 2.1
* of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
* }}}
*/
package com.openhtmltopdf.render;
import java.awt.BasicStroke;
import java.awt.Polygon;
import java.awt.Rectangle;
import java.awt.RenderingHints;
import java.awt.Shape;
import java.awt.Stroke;
import java.awt.geom.AffineTransform;
import java.awt.geom.Arc2D;
import java.awt.geom.Area;
import java.awt.geom.Path2D;
import java.awt.geom.Point2D;
import com.openhtmltopdf.css.constants.IdentValue;
import com.openhtmltopdf.css.parser.FSColor;
import com.openhtmltopdf.css.parser.FSRGBColor;
import com.openhtmltopdf.css.style.BorderRadiusCorner;
import com.openhtmltopdf.css.style.derived.BorderPropertySet;
import com.openhtmltopdf.extend.OutputDevice;
public class BorderPainter {
public static final int TOP = 1;
public static final int LEFT = 2;
public static final int BOTTOM = 4;
public static final int RIGHT = 8;
public static final int ALL = TOP + LEFT + BOTTOM + RIGHT;
/**
* Generates a full round rectangle that is made of bounds and border
* @param bounds Dimmensions of the rect
* @param border The border specs
* @param Set true if you want the inner bounds of borders
* @return A Path that is all sides of the round rectangle
*/
public static Path2D generateBorderBounds(Rectangle bounds, BorderPropertySet border, boolean inside) {
Path2D path = generateBorderShape(bounds, TOP, border, false, inside ? 1 : 0, 1);
path.append(generateBorderShape(bounds, RIGHT, border, false, inside ? 1 : 0, 1), true);
path.append(generateBorderShape(bounds, BOTTOM, border, false, inside ? 1 : 0, 1), true);
path.append(generateBorderShape(bounds, LEFT, border, false, inside ? 1 : 0, 1), true);
return path;
}
/**
* Generates one side of a border
* @param bounds bounds of the container
* @param side what side you want
* @param border border props
* @param drawInterior if you want it to be 2d or not, if false it will be just a line
* @return a path for the side chosen!
*/
public static Path2D generateBorderShape(Rectangle bounds, int side, BorderPropertySet border, boolean drawInterior) {
return generateBorderShape(bounds, side, border, drawInterior, 0, 1);
}
/**
* Generates one side of a border
* @param bounds bounds of the container
* @param side what side you want
* @param border border props
* @param drawInterior if you want it to be 2d or not, if false it will be just a line
* @param scaledOffset insets the border by multipling border widths by this variable, best use would be 1 or .5, cant see it for much other than that
* @return a path for the side chosen!
*/
public static Path2D generateBorderShape(Rectangle bounds, int side, BorderPropertySet border, boolean drawInterior, float scaledOffset) {
return generateBorderShape(bounds, side, border, drawInterior, scaledOffset, 1);
}
/**
* Generates one side of a border
* @param bounds bounds of the container
* @param side what side you want
* @param border border props
* @param drawInterior if you want it to be 2d or not, if false it will be just a line
* @param scaledOffset insets the border by multipling border widths by this variable, best use would be 1 or .5, cant see it for much other than that
* @param widthScale scales the border widths by this factor, useful for drawing half borders for border types like groove or double
* @return a path for the side chosen!
*/
public static Path2D generateBorderShape(Rectangle bounds, int side, BorderPropertySet border, boolean drawInterior, float scaledOffset, float widthScale) {
/**
* Function overview: Prior to creating the path we check what side were building this on. All the coordinates in this function assume its building a top border
* the border is then rotated and translated to its appropriate side. Uses of "left" and "right" are assuming a perspective of inside the shape looking out.
*/
border = border.normalizedInstance(new Rectangle((int)(bounds.width), (int)(bounds.height)));
RelativeBorderProperties props = new RelativeBorderProperties(bounds, border, 0f, side, 1+scaledOffset, widthScale);
float sideWidth;
if(props.isDimmensionsSwapped()) {
sideWidth = bounds.height-(1+scaledOffset)*(widthScale)*(border.top()+border.bottom());
} else {
sideWidth = bounds.width-(1+scaledOffset)*(widthScale)*(border.left()+border.right());
}
Path2D path = new Path2D.Float();
float angle = 90;
float widthSum = props.getTop() + props.getLeft();
if (widthSum != 0f) {
angle = angle * props.getTop() / widthSum;
}
appendPath(path, 0-props.getLeft(), 0-props.getTop(), props.getLeftCorner().left(), props.getLeftCorner().right(), 90+angle, -angle-1, props.getTop(), props.getLeft(), scaledOffset, true, widthScale);
angle = 90;
widthSum = props.getTop() + props.getRight();
if (widthSum != 0f) {
angle = angle * props.getTop() / widthSum;
}
appendPath(path, sideWidth+props.getRight(), 0-props.getTop(), props.getRightCorner().right(), props.getRightCorner().left(), 90, -angle-1, props.getTop(), props.getRight(), scaledOffset, false, widthScale);
if(drawInterior) {
//border = border.normalizeBorderRadius(new Rectangle((int)(bounds.width), (int)(bounds.height)));
//props = new RelativeBorderProperties(bounds, border, 0f, side, 1+scaledOffset, 1);
appendPath(path, sideWidth, 0, props.getRightCorner().right(), props.getRightCorner().left(), 90-angle, angle+1, props.getTop(), props.getRight(), scaledOffset+1, false, widthScale);
angle = 90;
widthSum = props.getTop() + props.getLeft();
if (widthSum != 0f) {
angle = angle * props.getTop() / widthSum;
}
appendPath(path, 0, 0, props.getLeftCorner().left(), props.getLeftCorner().right(), 90, angle+1, props.getTop(), props.getLeft(), scaledOffset+1, true, widthScale);
path.closePath();
}
path.transform(AffineTransform.getTranslateInstance(
(!props.isDimmensionsSwapped() ? -bounds.width/2f : -bounds.height/2f) + (scaledOffset+1)*props.getLeft(),
(props.isDimmensionsSwapped() ? -bounds.width/2f : -bounds.height/2f) + (scaledOffset+1)*props.getTop()));
path.transform(AffineTransform.getRotateInstance(
props.getRotation()));
path.transform(AffineTransform.getTranslateInstance(
bounds.width/2f+bounds.x, bounds.height/2f+bounds.y));
return path;
}
private static void appendPath(Path2D path, float xOffset, float yOffset, float radiusVert, float radiusHoriz, float startAngle, float distance, float topWidth, float sideWidth, float scaleOffset, boolean left, float widthScale) {
float innerWidth = 2*radiusHoriz - scaleOffset*sideWidth - scaleOffset*sideWidth;
float innerHeight = 2*radiusVert - scaleOffset*topWidth - scaleOffset*topWidth;
if(innerWidth > 0 && innerHeight > 0) {
// do arc
Arc2D arc = new Arc2D.Float(
xOffset-(left?0:(innerWidth)),
yOffset,
innerWidth,
innerHeight, startAngle, distance, Arc2D.OPEN);
path.append(arc, true);
} else {
// do line
if(path.getCurrentPoint() == null) {
path.moveTo(xOffset, yOffset);
} else {
path.lineTo(xOffset, yOffset);
}
}
}
private static class RelativeBorderProperties {
private final float _top;
private final float _left;
private final float _right;
private final BorderRadiusCorner _leftCorner;
private final BorderRadiusCorner _rightCorner;
private final double _rotation;
private final boolean _dimmensionsSwapped;
public RelativeBorderProperties(Rectangle bounds, BorderPropertySet props, float borderScaleOffset, int side, float scaledOffset, float widthScale) {
if ((side & BorderPainter.TOP) == BorderPainter.TOP) {
_top = props.top()*widthScale;
_left = props.left()*widthScale;
_right = props.right()*widthScale;
_leftCorner = props.getTopLeft();
_rightCorner = props.getTopRight();
_rotation = 0;
_dimmensionsSwapped = false;
} else if ((side & BorderPainter.RIGHT) == BorderPainter.RIGHT) {
_top = props.right()*widthScale;
_left = props.top()*widthScale;
_right = props.bottom()*widthScale;
_leftCorner = props.getTopRight();
_rightCorner = props.getBottomRight();
_rotation = Math.PI/2;
_dimmensionsSwapped = true;
} else if ((side & BorderPainter.BOTTOM) == BorderPainter.BOTTOM) {
_top = props.bottom()*widthScale;
_left = props.right()*widthScale;
_right = props.left()*widthScale;
_leftCorner = props.getBottomRight();
_rightCorner = props.getBottomLeft();
_rotation = Math.PI;
_dimmensionsSwapped = false;
} else if ((side & BorderPainter.LEFT) == BorderPainter.LEFT) {
_top = props.left()*widthScale;
_left = props.bottom()*widthScale;
_right = props.top()*widthScale;
_leftCorner = props.getBottomLeft();
_rightCorner = props.getTopLeft();
_rotation = 3*Math.PI/2;
_dimmensionsSwapped = true;
} else {
throw new IllegalArgumentException("No side found");
}
}
public BorderRadiusCorner getRightCorner() {
return _rightCorner;
}
public BorderRadiusCorner getLeftCorner() {
return _leftCorner;
}
public float getTop() {
return _top;
}
public float getLeft() {
return _left;
}
public float getRight() {
return _right;
}
private double getRotation() {
return _rotation;
}
private boolean isDimmensionsSwapped() {
return _dimmensionsSwapped;
}
}
/**
* @param xOffset for determining starting point for patterns
*/
public static void paint(
Rectangle bounds, int sides, BorderPropertySet border,
RenderingContext ctx, int xOffset, boolean bevel) {
if ((sides & BorderPainter.TOP) == BorderPainter.TOP && border.noTop()) {
sides -= BorderPainter.TOP;
}
if ((sides & BorderPainter.LEFT) == BorderPainter.LEFT && border.noLeft()) {
sides -= BorderPainter.LEFT;
}
if ((sides & BorderPainter.BOTTOM) == BorderPainter.BOTTOM && border.noBottom()) {
sides -= BorderPainter.BOTTOM;
}
if ((sides & BorderPainter.RIGHT) == BorderPainter.RIGHT && border.noRight()) {
sides -= BorderPainter.RIGHT;
}
//Now paint!
if ((sides & BorderPainter.TOP) == BorderPainter.TOP && border.topColor() != FSRGBColor.TRANSPARENT) {
paintBorderSide(ctx.getOutputDevice(),
border, bounds, sides, BorderPainter.TOP, border.topStyle(), xOffset, bevel);
}
if ((sides & BorderPainter.BOTTOM) == BorderPainter.BOTTOM && border.bottomColor() != FSRGBColor.TRANSPARENT) {
paintBorderSide(ctx.getOutputDevice(),
border, bounds, sides, BorderPainter.BOTTOM, border.bottomStyle(), xOffset, bevel);
}
if ((sides & BorderPainter.LEFT) == BorderPainter.LEFT && border.leftColor() != FSRGBColor.TRANSPARENT) {
paintBorderSide(ctx.getOutputDevice(),
border, bounds, sides, BorderPainter.LEFT, border.leftStyle(), xOffset, bevel);
}
if ((sides & BorderPainter.RIGHT) == BorderPainter.RIGHT && border.rightColor() != FSRGBColor.TRANSPARENT) {
paintBorderSide(ctx.getOutputDevice(),
border, bounds, sides, BorderPainter.RIGHT, border.rightStyle(), xOffset, bevel);
}
}
private static void paintBorderSide(OutputDevice outputDevice,
final BorderPropertySet border, final Rectangle bounds, final int sides,
int currentSide, final IdentValue borderSideStyle, int xOffset, boolean bevel) {
if (borderSideStyle == IdentValue.RIDGE || borderSideStyle == IdentValue.GROOVE) {
BorderPropertySet bd2 = new BorderPropertySet((int) (border.top() / 2),
(int) (border.right() / 2),
(int) (border.bottom() / 2),
(int) (border.left() / 2));
BorderPropertySet borderA = null,
borderB = null;
if (borderSideStyle == IdentValue.RIDGE) {
borderA = border;
borderB = border.darken(borderSideStyle);
} else {
borderA = border.darken(borderSideStyle);
borderB = border;
}
paintBorderSideShape(
outputDevice, bounds, bd2, borderA,
borderB,
0, 1, sides, currentSide, bevel);
paintBorderSideShape(
outputDevice, bounds, border, borderB,
borderA,
1, .5f, sides, currentSide, bevel);
} else if (borderSideStyle == IdentValue.OUTSET) {
paintBorderSideShape(outputDevice, bounds, border,
border,
border.darken(borderSideStyle),
0, 1, sides, currentSide, bevel);
} else if (borderSideStyle == IdentValue.INSET) {
paintBorderSideShape(outputDevice, bounds, border,
border.darken(borderSideStyle),
border,
0, 1, sides, currentSide, bevel);
} else if (borderSideStyle == IdentValue.SOLID) {
outputDevice.setStroke(new BasicStroke(1f));
if(currentSide == TOP) {
outputDevice.setColor(border.topColor());
outputDevice.fill(generateBorderShape(bounds, TOP, border, true, 0, 1));
}
if(currentSide == RIGHT) {
outputDevice.setColor(border.rightColor());
outputDevice.fill(generateBorderShape(bounds, RIGHT, border, true, 0, 1));
}
if(currentSide == BOTTOM) {
outputDevice.setColor(border.bottomColor());
outputDevice.fill(generateBorderShape(bounds, BOTTOM, border, true, 0, 1));
}
if(currentSide == LEFT) {
outputDevice.setColor(border.leftColor());
outputDevice.fill(generateBorderShape(bounds, LEFT, border, true, 0, 1));
}
} else if (borderSideStyle == IdentValue.DOUBLE) {
paintDoubleBorder(outputDevice, border, bounds, sides, currentSide, bevel);
} else {
int thickness = 0;
if (currentSide == BorderPainter.TOP) thickness = (int) border.top();
if (currentSide == BorderPainter.BOTTOM) thickness = (int) border.bottom();
if (currentSide == BorderPainter.RIGHT) thickness = (int) border.right();
if (currentSide == BorderPainter.LEFT) thickness = (int) border.left();
if (borderSideStyle == IdentValue.DASHED) {
//outputDevice.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_OFF);
paintPatternedRect(outputDevice, bounds, border, border, new float[]{8.0f + thickness * 2, 4.0f + thickness}, sides, currentSide, xOffset);
//outputDevice.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON);
}
if (borderSideStyle == IdentValue.DOTTED) {
// turn off anti-aliasing or the dots will be all blurry
//outputDevice.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_OFF);
paintPatternedRect(outputDevice, bounds, border, border, new float[]{thickness, thickness}, sides, currentSide, xOffset);
//outputDevice.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON);
}
}
}
private static void paintDoubleBorder(
OutputDevice outputDevice, BorderPropertySet border,
Rectangle bounds, int sides, int currentSide, boolean bevel) {
// draw outer border
paintSolid(outputDevice, bounds, border, 0, 1/3f, sides, currentSide, bevel);
// draw inner border
//paintSolid(outputDevice, bounds, border, 1, 1/3f, sides, currentSide, bevel);
paintSolid(outputDevice, bounds, border, 2, 1/3f, sides, currentSide, bevel);
}
/**
* @param xOffset for inline borders, to determine dash_phase of top and bottom
*/
private static void paintPatternedRect(OutputDevice outputDevice,
final Rectangle bounds, final BorderPropertySet border,
final BorderPropertySet color, final float[] pattern,
final int sides, final int currentSide, int xOffset) {
Stroke old_stroke = outputDevice.getStroke();
Path2D path = generateBorderShape(bounds, currentSide, border, false, .5f, 1);
Area clip = new Area(generateBorderShape(bounds, currentSide, border, true, 0, 1));
Shape old_clip = outputDevice.getClip();
if(old_clip != null) {
// we need to respect the clip sent to us, get the intersection between the old and the new
clip.intersect(new Area(old_clip));
}
outputDevice.setClip(clip);
if (currentSide == BorderPainter.TOP) {
outputDevice.setColor(color.topColor());
outputDevice.setStroke(new BasicStroke(2*(int) border.top(), BasicStroke.CAP_BUTT, BasicStroke.JOIN_BEVEL, 0, pattern, xOffset));
outputDevice.drawBorderLine(
path, BorderPainter.TOP, (int)border.top(), false);
} else if (currentSide == BorderPainter.LEFT) {
outputDevice.setColor(color.leftColor());
outputDevice.setStroke(new BasicStroke(2*(int) border.left(), BasicStroke.CAP_BUTT, BasicStroke.JOIN_BEVEL, 0, pattern, 0));
outputDevice.drawBorderLine(
path, BorderPainter.LEFT, (int)border.left(), false);
} else if (currentSide == BorderPainter.RIGHT) {
outputDevice.setColor(color.rightColor());
outputDevice.setStroke(new BasicStroke(2*(int) border.right(), BasicStroke.CAP_BUTT, BasicStroke.JOIN_BEVEL, 0, pattern, 0));
outputDevice.drawBorderLine(
path, BorderPainter.RIGHT, (int)border.right(), false);
} else if (currentSide == BorderPainter.BOTTOM) {
outputDevice.setColor(color.bottomColor());
outputDevice.setStroke(new BasicStroke(2*(int) border.bottom(), BasicStroke.CAP_BUTT, BasicStroke.JOIN_BEVEL, 0, pattern, xOffset));
outputDevice.drawBorderLine(
path, BorderPainter.BOTTOM, (int)border.bottom(), false);
}
outputDevice.setClip(old_clip);
outputDevice.setStroke(old_stroke);
}
private static void paintBorderSideShape(OutputDevice outputDevice,
final Rectangle bounds, final BorderPropertySet border,
final BorderPropertySet high, final BorderPropertySet low,
final float offset, final float scale,
final int sides, int currentSide, boolean bevel) {
if (currentSide == BorderPainter.TOP) {
paintSolid(outputDevice, bounds, high, offset, scale, sides, currentSide, bevel);
} else if (currentSide == BorderPainter.BOTTOM) {
paintSolid(outputDevice, bounds, low, offset, scale, sides, currentSide, bevel);
} else if (currentSide == BorderPainter.RIGHT) {
paintSolid(outputDevice, bounds, low, offset, scale, sides, currentSide, bevel);
} else if (currentSide == BorderPainter.LEFT) {
paintSolid(outputDevice, bounds, high, offset, scale, sides, currentSide, bevel);
}
}
private static void paintSolid(OutputDevice outputDevice,
final Rectangle bounds, final BorderPropertySet border,
final float offset, final float scale, final int sides, int currentSide,
boolean bevel) {
if (currentSide == BorderPainter.TOP) {
outputDevice.setColor(border.topColor());
// draw a 1px border with a line instead of a polygon
if ((int) border.top() == 1) {
Shape line = generateBorderShape(bounds, currentSide, border, false, offset, scale);
outputDevice.draw(line);
} else {
Shape line = generateBorderShape(bounds, currentSide, border, true, offset, scale);
// use polygons for borders over 1px wide
outputDevice.fill(line);
}
} else if (currentSide == BorderPainter.BOTTOM) {
outputDevice.setColor(border.bottomColor());
if ((int) border.bottom() == 1) {
Shape line = generateBorderShape(bounds, currentSide, border, false, offset, scale);
outputDevice.draw(line);
} else {
Shape line = generateBorderShape(bounds, currentSide, border, true, offset, scale);
// use polygons for borders over 1px wide
outputDevice.fill(line);
}
} else if (currentSide == BorderPainter.RIGHT) {
outputDevice.setColor(border.rightColor());
if ((int) border.right() == 1) {
Shape line = generateBorderShape(bounds, currentSide, border, false, offset, scale);
outputDevice.draw(line);
} else {
Shape line = generateBorderShape(bounds, currentSide, border, true, offset, scale);
// use polygons for borders over 1px wide
outputDevice.fill(line);
}
} else if (currentSide == BorderPainter.LEFT) {
outputDevice.setColor(border.leftColor());
if ((int) border.left() == 1) {
Shape line = generateBorderShape(bounds, currentSide, border, false, offset, scale);
outputDevice.draw(line);
} else {
Shape line = generateBorderShape(bounds, currentSide, border, true, offset, scale);
// use polygons for borders over 1px wide
outputDevice.fill(line);
}
}
}
}
/*
* $Id$
*
* $Log$
* Revision 1.48 2008/07/27 00:21:47 peterbrant
* Implement CMYK color support for PDF output, starting with patch from Mykola Gurov / Banish java.awt.Color from FS core layout classes
*
* Revision 1.47 2007/04/24 17:04:31 peterbrant
* Method name improvements
*
* Revision 1.46 2007/03/01 18:00:10 peterbrant
* Fix rounding problems with double borders / Light BorderPainter cleanup (more needed) / Don't bevel collapsed table borders
*
* Revision 1.45 2007/02/07 16:33:25 peterbrant
* Initial commit of rewritten table support and associated refactorings
*
* Revision 1.44 2007/01/17 17:50:54 peterbrant
* Clean out unused code
*
* Revision 1.43 2006/02/21 18:09:17 peterbrant
* Fix call to BorderPropertySet constructor
*
* Revision 1.42 2006/02/01 01:30:14 peterbrant
* Initial commit of PDF work
*
* Revision 1.41 2006/01/27 01:15:36 peterbrant
* Start on better support for different output devices
*
* Revision 1.40 2005/12/15 20:04:13 peterbrant
* Don't paint transparent borders
*
* Revision 1.39 2005/11/08 20:02:14 peterbrant
* Fix off by one errors for borders with an odd width
*
* Revision 1.38 2005/10/27 00:09:02 tobega
* Sorted out Context into RenderingContext and LayoutContext
*
* Revision 1.37 2005/10/21 18:49:44 pdoubleya
* Fixed border painting bug.
*
* Revision 1.36 2005/10/21 18:10:52 pdoubleya
* Support for cachable borders. Still buggy on some pages, but getting there.
*
* Revision 1.35 2005/06/22 23:48:45 tobega
* Refactored the css package to allow a clean separation from the core.
*
* Revision 1.34 2005/06/04 16:04:12 tobega
* just playing with border colors a bit more
*
* Revision 1.33 2005/06/04 14:47:43 tobega
* Just for fun: took more control over darkening/brightening colors. Looks nice, though.
*
* Revision 1.32 2005/06/03 01:08:58 tobega
* Fixed bug in painting double borders
*
* Revision 1.31 2005/05/29 23:49:15 tobega
* Did it right, this time, so that inline borders also look nice
*
* Revision 1.30 2005/05/29 23:43:28 tobega
* Removed tendency for white diagonal line in corners
*
* Revision 1.29 2005/05/29 20:13:20 tobega
* Cleaned up duplicate code
*
* Revision 1.28 2005/05/29 19:37:58 tobega
* Fixed up using different style borders.
* Fixed patterned borders to work right.
*
* Revision 1.27 2005/05/16 08:07:09 tobega
* Border painting for inlines works beautifully (tested only solid borders)
*
* Revision 1.26 2005/05/13 11:49:59 tobega
* Started to fix up borders on inlines. Got caught up in refactoring.
* Boxes shouldn't cache borders and stuff unless necessary. Started to remove unnecessary references.
* Hover is not working completely well now, might get better when I'm done.
*
* Revision 1.25 2005/05/13 08:46:17 tobega
* A line is drawn to the right and below the coordinate. Needed to adjust when drawing lines for 1-pixel borders
*
* Revision 1.24 2005/05/12 06:24:16 joshy
* more very minor border and background tweaks
* Issue number:
* Obtained from:
* Submitted by:
* Reviewed by:
*
* Revision 1.23 2005/05/12 04:55:57 joshy
* fix for issues 76
* Issue number:
* Obtained from:
* Submitted by:
* Reviewed by:
*
* Revision 1.22 2005/05/08 14:36:58 tobega
* Refactored away the need for having a context in a CalculatedStyle
*
* Revision 1.21 2005/01/29 20:24:23 pdoubleya
* Clean/reformat code. Removed commented blocks, checked copyright.
*
* Revision 1.20 2005/01/25 10:56:56 pdoubleya
* Added warning on possible duplicate code.
*
* Revision 1.19 2005/01/25 10:55:15 pdoubleya
* Added warning on possible duplicate code.
*
* Revision 1.18 2005/01/24 22:46:42 pdoubleya
* Added support for ident-checks using IdentValue instead of string comparisons.
*
* Revision 1.17 2005/01/24 14:36:34 pdoubleya
* Mass commit, includes: updated for changes to property declaration instantiation, and new use of DerivedValue. Removed any references to older XR... classes (e.g. XRProperty). Cleaned imports.
*
* Revision 1.16 2005/01/09 15:22:49 tobega
* Prepared improved handling of margins, borders and padding.
*
* Revision 1.15 2004/12/29 10:39:34 tobega
* Separated current state Context into LayoutContext and the rest into SharedContext.
*
* Revision 1.14 2004/12/27 09:40:48 tobega
* Moved more styling to render stage. Now inlines have backgrounds and borders again.
*
* Revision 1.13 2004/12/27 07:43:32 tobega
* Cleaned out border from box, it can be gotten from current style. Is it maybe needed for dynamic stuff?
*
* Revision 1.12 2004/12/13 02:12:53 tobega
* Borders are working again
*
* Revision 1.11 2004/12/12 04:18:57 tobega
* Now the core compiles at least. Now we must make it work right. Table layout is one point that really needs to be looked over
*
* Revision 1.10 2004/12/12 03:33:00 tobega
* Renamed x and u to avoid confusing IDE. But that got cvs in a twist. See if this does it
*
* Revision 1.9 2004/12/11 23:36:49 tobega
* Progressing on cleaning up layout and boxes. Still broken, won't even compile at the moment. Working hard to fix it, though.
*
* Revision 1.8 2004/12/05 00:48:58 tobega
* Cleaned up so that now all property-lookups use the CalculatedStyle. Also added support for relative values of top, left, width, etc.
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* Revision 1.7 2004/11/09 15:53:49 joshy
* initial support for hover (currently disabled)
* moved justification code into it's own class in a new subpackage for inline
* layout (because it's so blooming complicated)
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* Revision 1.6 2004/11/07 16:23:18 joshy
* added support for lighten and darken to bordercolor
* added support for different colored sides
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* Revision 1.5 2004/11/06 22:49:52 joshy
* cleaned up alice
* initial support for inline borders and backgrounds
* moved all of inlinepainter back into inlinerenderer, where it belongs.
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* Revision 1.4 2004/11/02 17:14:00 joshy
* implemented double borders
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* Revision 1.3 2004/10/23 13:50:26 pdoubleya
* Re-formatted using JavaStyle tool.
* Cleaned imports to resolve wildcards except for common packages (java.io, java.util, etc).
* Added CVS log comments at bottom.
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*/
