com.itextpdf.layout.borders.Border Maven / Gradle / Ivy
/*
This file is part of the iText (R) project.
Copyright (c) 1998-2020 iText Group NV
Authors: Bruno Lowagie, Paulo Soares, et al.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU Affero General Public License version 3
as published by the Free Software Foundation with the addition of the
following permission added to Section 15 as permitted in Section 7(a):
FOR ANY PART OF THE COVERED WORK IN WHICH THE COPYRIGHT IS OWNED BY
ITEXT GROUP. ITEXT GROUP DISCLAIMS THE WARRANTY OF NON INFRINGEMENT
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or FITNESS FOR A PARTICULAR PURPOSE.
See the GNU Affero General Public License for more details.
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along with this program; if not, see http://www.gnu.org/licenses or write to
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*/
package com.itextpdf.layout.borders;
import com.itextpdf.io.LogMessageConstant;
import com.itextpdf.io.util.MessageFormatUtil;
import com.itextpdf.kernel.colors.Color;
import com.itextpdf.kernel.colors.ColorConstants;
import com.itextpdf.kernel.geom.Point;
import com.itextpdf.kernel.geom.Rectangle;
import com.itextpdf.kernel.pdf.canvas.PdfCanvas;
import com.itextpdf.layout.property.TransparentColor;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
/**
* Represents a border.
*/
public abstract class Border {
/**
* The null Border, i.e. the presence of such border is equivalent to the absence of the border
*/
public static final Border NO_BORDER = null;
/**
* Value used by discontinuous borders during the drawing process
*/
private static final float CURV = 0.447f;
/**
* The solid border.
*
* @see SolidBorder
*/
public static final int SOLID = 0;
/**
* The dashed border.
*
* @see DashedBorder
*/
public static final int DASHED = 1;
/**
* The dotted border.
*
* @see DottedBorder
*/
public static final int DOTTED = 2;
/**
* The double border.
*
* @see DoubleBorder
*/
public static final int DOUBLE = 3;
/**
* The round-dots border.
*
* @see RoundDotsBorder
*/
public static final int ROUND_DOTS = 4;
/**
* The 3D groove border.
*
* @see GrooveBorder
*/
public static final int _3D_GROOVE = 5;
/**
* The 3D inset border.
*
* @see InsetBorder
*/
public static final int _3D_INSET = 6;
/**
* The 3D outset border.
*
* @see OutsetBorder
*/
public static final int _3D_OUTSET = 7;
/**
* The 3D ridge border.
*
* @see RidgeBorder
*/
public static final int _3D_RIDGE = 8;
/**
* The color of the border.
*
* @see TransparentColor
*/
protected TransparentColor transparentColor;
/**
* The width of the border.
*/
protected float width;
/**
* The type of the border.
*/
protected int type;
/**
* The hash value for the border.
*/
private int hash;
/**
* Creates a {@link Border border} with the given width.
* The {@link Color color} to be set by default is black
*
* @param width the width which the border should have
*/
protected Border(float width) {
this(ColorConstants.BLACK, width);
}
/**
* Creates a {@link Border border} with given width and {@link Color color}.
*
* @param color the color which the border should have
* @param width the width which the border should have
*/
protected Border(Color color, float width) {
this.transparentColor = new TransparentColor(color);
this.width = width;
}
/**
* Creates a {@link Border border} with given width, {@link Color color} and opacity.
*
* @param color the color which the border should have
* @param width the width which the border should have
* @param opacity the opacity which border should have; a float between 0 and 1, where 1 stands for fully opaque color and 0 - for fully transparent
*/
protected Border(Color color, float width, float opacity) {
this.transparentColor = new TransparentColor(color, opacity);
this.width = width;
}
/**
* All borders are supposed to be drawn in such way, that inner content of the element is on the right from the
* drawing direction. Borders are drawn in this order: top, right, bottom, left.
*
* Given points specify the line which lies on the border of the content area,
* therefore the border itself should be drawn to the left from the drawing direction.
*
* borderWidthBefore and borderWidthAfter parameters are used to
* define the widths of the borders that are before and after the current border, e.g. for
* the bottom border, borderWidthBefore specifies width of the right border and
* borderWidthAfter - width of the left border. Those width are used to handle areas
* of border joins.
*
* @param canvas PdfCanvas to be written to
* @param x1 x coordinate of the beginning point of the element side, that should be bordered
* @param y1 y coordinate of the beginning point of the element side, that should be bordered
* @param x2 x coordinate of the ending point of the element side, that should be bordered
* @param y2 y coordinate of the ending point of the element side, that should be bordered
* @param defaultSide the {@link Border.Side}, that we will fallback to, if it cannot be determined by border coordinates
* @param borderWidthBefore defines width of the border that is before the current one
* @param borderWidthAfter defines width of the border that is after the current one
*/
public abstract void draw(PdfCanvas canvas, float x1, float y1, float x2, float y2, Side defaultSide, float borderWidthBefore, float borderWidthAfter);
/**
* All borders are supposed to be drawn in such way, that inner content of the element is on the right from the
* drawing direction. Borders are drawn in this order: top, right, bottom, left.
*
* Given points specify the line which lies on the border of the content area,
* therefore the border itself should be drawn to the left from the drawing direction.
*
* borderWidthBefore and borderWidthAfter parameters are used to
* define the widths of the borders that are before and after the current border, e.g. for
* the bottom border, borderWidthBefore specifies width of the right border and
* borderWidthAfter - width of the left border. Those width are used to handle areas
* of border joins.
*
* borderRadius is used to draw rounded borders.
*
* @param canvas PdfCanvas to be written to
* @param x1 x coordinate of the beginning point of the element side, that should be bordered
* @param y1 y coordinate of the beginning point of the element side, that should be bordered
* @param x2 x coordinate of the ending point of the element side, that should be bordered
* @param y2 y coordinate of the ending point of the element side, that should be bordered
* @param borderRadius defines the radius of the element's corners
* @param defaultSide the {@link Border.Side}, that we will fallback to, if it cannot be determined by border coordinates
* @param borderWidthBefore defines width of the border that is before the current one
* @param borderWidthAfter defines width of the border that is after the current one
*/
public void draw(PdfCanvas canvas, float x1, float y1, float x2, float y2, float borderRadius, Side defaultSide, float borderWidthBefore, float borderWidthAfter) {
draw(canvas, x1, y1, x2, y2, borderRadius, borderRadius, borderRadius, borderRadius, defaultSide, borderWidthBefore, borderWidthAfter);
}
/**
* All borders are supposed to be drawn in such way, that inner content of the element is on the right from the
* drawing direction. Borders are drawn in this order: top, right, bottom, left.
*
* Given points specify the line which lies on the border of the content area,
* therefore the border itself should be drawn to the left from the drawing direction.
*
* borderWidthBefore and borderWidthAfter parameters are used to
* define the widths of the borders that are before and after the current border, e.g. for
* the bottom border, borderWidthBefore specifies width of the right border and
* borderWidthAfter - width of the left border. Those width are used to handle areas
* of border joins.
*
* horizontalRadius1, verticalRadius1, horizontalRadius2
* and verticalRadius2 are used to draw rounded borders.
*
* @param canvas PdfCanvas to be written to
* @param x1 x coordinate of the beginning point of the element side, that should be bordered
* @param y1 y coordinate of the beginning point of the element side, that should be bordered
* @param x2 x coordinate of the ending point of the element side, that should be bordered
* @param y2 y coordinate of the ending point of the element side, that should be bordered
* @param horizontalRadius1 defines the horizontal radius of the border's first corner
* @param verticalRadius1 defines the vertical radius of the border's first corner
* @param horizontalRadius2 defines the horizontal radius of the border's second corner
* @param verticalRadius2 defines the vertical radius of the border's second corner
* @param defaultSide the {@link Border.Side}, that we will fallback to, if it cannot be determined by border coordinates
* @param borderWidthBefore defines width of the border that is before the current one
* @param borderWidthAfter defines width of the border that is after the current one
*/
public void draw(PdfCanvas canvas, float x1, float y1, float x2, float y2, float horizontalRadius1, float verticalRadius1, float horizontalRadius2, float verticalRadius2, Side defaultSide, float borderWidthBefore, float borderWidthAfter) {
Logger logger = LoggerFactory.getLogger(Border.class);
logger.warn(MessageFormatUtil.format(LogMessageConstant.METHOD_IS_NOT_IMPLEMENTED_BY_DEFAULT_OTHER_METHOD_WILL_BE_USED,
"Border#draw(PdfCanvas, float, float, float, float, float, float, float, float, Side, float, float",
"Border#draw(PdfCanvas, float, float, float, float, Side, float, float)"));
draw(canvas, x1, y1, x2, y2, defaultSide, borderWidthBefore, borderWidthAfter);
}
/**
* Draws the border of a cell.
*
* @param canvas PdfCanvas to be written to
* @param x1 x coordinate of the beginning point of the element side, that should be bordered
* @param y1 y coordinate of the beginning point of the element side, that should be bordered
* @param x2 x coordinate of the ending point of the element side, that should be bordered
* @param y2 y coordinate of the ending point of the element side, that should be bordered
* @param defaultSide the {@link Border.Side}, that we will fallback to, if it cannot be determined by border coordinates
*/
public abstract void drawCellBorder(PdfCanvas canvas, float x1, float y1, float x2, float y2, Side defaultSide);
/**
* Returns the type of the {@link Border border}
*
* @return the type of border.
*/
public abstract int getType();
/**
* Gets the {@link Color color} of the {@link Border border}
*
* @return the {@link Color color}
*/
public Color getColor() {
return transparentColor.getColor();
}
/**
* Gets the opacity of the {@link Border border}
*
* @return the border opacity; a float between 0 and 1, where 1 stands for fully opaque color and 0 - for fully transparent
*/
public float getOpacity() {
return transparentColor.getOpacity();
}
/**
* Gets the width of the {@link Border border}
*
* @return the width
*/
public float getWidth() {
return width;
}
/**
* Sets the {@link Color color} of the {@link Border border}
*
* @param color The color
*/
public void setColor(Color color) {
this.transparentColor = new TransparentColor(color, this.transparentColor.getOpacity());
}
/**
* Sets the width of the {@link Border border}
*
* @param width The width
*/
public void setWidth(float width) {
this.width = width;
}
/**
* Indicates whether the border is equal to the given border.
* The border type, width and color are considered during the comparison.
*/
@Override
public boolean equals(Object anObject) {
if (this == anObject) {
return true;
}
if (anObject instanceof Border) {
Border anotherBorder = (Border) anObject;
if (anotherBorder.getType() != getType()
|| !anotherBorder.getColor().equals(getColor())
|| anotherBorder.getWidth() != getWidth()
|| anotherBorder.transparentColor.getOpacity() != transparentColor.getOpacity()) {
return false;
}
} else {
return false;
}
return true;
}
/**
* {@inheritDoc}
*/
@Override
public int hashCode() {
int h = hash;
if (h == 0) {
h = (int) getWidth() * 31 + getColor().hashCode();
h = h * 31 + (int) transparentColor.getOpacity();
hash = h;
}
return h;
}
/**
* Returns the {@link Side side} corresponded to the line between two points.
* Notice that we consider the rectangle traversal to be clockwise.
* In case side couldn't be detected we will fallback to default side
*
* @param x1 the abscissa of the left-bottom point
* @param y1 the ordinate of the left-bottom point
* @param x2 the abscissa of the right-top point
* @param y2 the ordinate of the right-top point
* @param defaultSide the default side of border
* @return the corresponded {@link Side side}
*/
protected Side getBorderSide(float x1, float y1, float x2, float y2, Side defaultSide) {
boolean isLeft = false;
boolean isRight = false;
if (Math.abs(y2 - y1) > 0.0005f) {
isLeft = y2 - y1 > 0;
isRight = y2 - y1 < 0;
}
boolean isTop = false;
boolean isBottom = false;
if (Math.abs(x2 - x1) > 0.0005f) {
isTop = x2 - x1 > 0;
isBottom = x2 - x1 < 0;
}
if (isTop) {
return isLeft ? Side.LEFT : Side.TOP;
} else if (isRight) {
return Side.RIGHT;
} else if (isBottom) {
return Side.BOTTOM;
} else if (isLeft) {
return Side.LEFT;
}
return defaultSide;
}
/**
* Enumerates the different sides of the rectangle.
* The rectangle sides are expected to be parallel to corresponding page sides
* Otherwise the result is Side.NONE
*/
public enum Side {
NONE, TOP, RIGHT, BOTTOM, LEFT
}
protected Point getIntersectionPoint(Point lineBeg, Point lineEnd, Point clipLineBeg, Point clipLineEnd) {
double A1 = lineBeg.getY() - lineEnd.getY(), A2 = clipLineBeg.getY() - clipLineEnd.getY();
double B1 = lineEnd.getX() - lineBeg.getX(), B2 = clipLineEnd.getX() - clipLineBeg.getX();
double C1 = lineBeg.getX() * lineEnd.getY() - lineBeg.getY() * lineEnd.getX();
double C2 = clipLineBeg.getX() * clipLineEnd.getY() - clipLineBeg.getY() * clipLineEnd.getX();
double M = B1 * A2 - B2 * A1;
return new Point((B2 * C1 - B1 * C2) / M, (C2 * A1 - C1 * A2) / M);
}
/**
* Adjusts the size of the gap between dots
*
* @param distance the {@link Border border} length
* @param initialGap the initial size of the gap
* @return the adjusted size of the gap
*/
protected float getDotsGap(double distance, float initialGap) {
double gapsNum = Math.ceil(distance / initialGap);
if (gapsNum == 0) {
return initialGap;
}
return (float) (distance / gapsNum);
}
/**
* Perform drawing operations to draw discontinuous borders. Used by {@link DashedBorder}, {@link DottedBorder} and {@link RoundDotsBorder}.
*
* @param canvas canvas to draw on
* @param defaultSide the {@link Border.Side}, that we will fallback to, if it cannot be determined by border coordinates
* @param borderWidthBefore defines width of the border that is before the current one
* @param borderWidthAfter defines width of the border that is after the current one
*/
/**
* Perform drawing operations to draw discontinuous borders. Used by {@link DashedBorder}, {@link DottedBorder} and {@link RoundDotsBorder}.
*
* @param canvas canvas to draw on
* @param boundingRectangle rectangle representing the bounding box of the drawing operations
* @param horizontalRadii the horizontal radius of the border's two corners
* @param verticalRadii the vertical radius of the border's two corners
* @param defaultSide the {@link Border.Side}, that we will fallback to, if it cannot be determined by border coordinates
* @param borderWidthBefore defines width of the border that is before the current one
* @param borderWidthAfter defines width of the border that is after the current one
*/
protected void drawDiscontinuousBorders(PdfCanvas canvas, Rectangle boundingRectangle, float[] horizontalRadii, float[] verticalRadii, Side defaultSide, float borderWidthBefore, float borderWidthAfter) {
float x1 = boundingRectangle.getX();
float y1 = boundingRectangle.getY();
float x2 = boundingRectangle.getRight();
float y2 = boundingRectangle.getTop();
float horizontalRadius1 = horizontalRadii[0];
float horizontalRadius2 = horizontalRadii[1];
float verticalRadius1 = verticalRadii[0];
float verticalRadius2 = verticalRadii[1];
// Points (x0, y0) and (x3, y3) are used to produce Bezier curve
float x0 = boundingRectangle.getX();
float y0 = boundingRectangle.getY();
float x3 = boundingRectangle.getRight();
float y3 = boundingRectangle.getTop();
float innerRadiusBefore;
float innerRadiusFirst;
float innerRadiusSecond;
float innerRadiusAfter;
float widthHalf = width / 2;
Point clipPoint1;
Point clipPoint2;
Point clipPoint;
Border.Side borderSide = getBorderSide(x1, y1, x2, y2, defaultSide);
switch (borderSide) {
case TOP:
innerRadiusBefore = Math.max(0, horizontalRadius1 - borderWidthBefore);
innerRadiusFirst = Math.max(0, verticalRadius1 - width);
innerRadiusSecond = Math.max(0, verticalRadius2 - width);
innerRadiusAfter = Math.max(0, horizontalRadius2 - borderWidthAfter);
x0 -= borderWidthBefore / 2;
y0 -= innerRadiusFirst;
x3 += borderWidthAfter / 2;
y3 -= innerRadiusSecond;
clipPoint1 = getIntersectionPoint(new Point(x1 - borderWidthBefore, y1 + width), new Point(x1, y1), new Point(x0, y0), new Point(x0 + 10, y0));
clipPoint2 = getIntersectionPoint(new Point(x2 + borderWidthAfter, y2 + width), new Point(x2, y2), new Point(x3, y3), new Point(x3 - 10, y3));
if (clipPoint1.x > clipPoint2.x) {
clipPoint = getIntersectionPoint(new Point(x1 - borderWidthBefore, y1 + width), clipPoint1, clipPoint2, new Point(x2 + borderWidthAfter, y2 + width));
canvas.moveTo(x1 - borderWidthBefore, y1 + width).lineTo(clipPoint.x, clipPoint.y).lineTo(x2 + borderWidthAfter, y2 + width).lineTo(x1 - borderWidthBefore, y1 + width);
} else {
canvas.moveTo(x1 - borderWidthBefore, y1 + width).lineTo(clipPoint1.x, clipPoint1.y).lineTo(clipPoint2.x, clipPoint2.y).lineTo(x2 + borderWidthAfter, y2 + width).lineTo(x1 - borderWidthBefore, y1 + width);
}
canvas.clip().endPath();
x1 += innerRadiusBefore;
y1 += widthHalf;
x2 -= innerRadiusAfter;
y2 += widthHalf;
canvas
.moveTo(x0, y0).curveTo(x0, y0 + innerRadiusFirst * CURV, x1 - innerRadiusBefore * CURV, y1, x1, y1)
.lineTo(x2, y2)
.curveTo(x2 + innerRadiusAfter * CURV, y2, x3, y3 + innerRadiusSecond * CURV, x3, y3);
break;
case RIGHT:
innerRadiusBefore = Math.max(0, verticalRadius1 - borderWidthBefore);
innerRadiusFirst = Math.max(0, horizontalRadius1 - width);
innerRadiusSecond = Math.max(0, horizontalRadius2 - width);
innerRadiusAfter = Math.max(0, verticalRadius2 - borderWidthAfter);
x0 -= innerRadiusFirst;
y0 += borderWidthBefore / 2;
x3 -= innerRadiusSecond;
y3 -= borderWidthAfter / 2;
clipPoint1 = getIntersectionPoint(new Point(x1 + width, y1 + borderWidthBefore), new Point(x1, y1), new Point(x0, y0), new Point(x0, y0 - 10));
clipPoint2 = getIntersectionPoint(new Point(x2 + width, y2 - borderWidthAfter), new Point(x2, y2), new Point(x3, y3), new Point(x3, y3 - 10));
if (clipPoint1.y < clipPoint2.y) {
clipPoint = getIntersectionPoint(new Point(x1 + width, y1 + borderWidthBefore), clipPoint1, clipPoint2, new Point(x2 + width, y2 - borderWidthAfter));
canvas.moveTo(x1 + width, y1 + borderWidthBefore).lineTo(clipPoint.x, clipPoint.y).lineTo(x2 + width, y2 - borderWidthAfter).lineTo(x1 + width, y1 + borderWidthBefore).clip().endPath();
} else {
canvas.moveTo(x1 + width, y1 + borderWidthBefore).lineTo(clipPoint1.x, clipPoint1.y).lineTo(clipPoint2.x, clipPoint2.y).lineTo(x2 + width, y2 - borderWidthAfter).lineTo(x1 + width, y1 + borderWidthBefore).clip().endPath();
}
canvas.clip().endPath();
x1 += widthHalf;
y1 -= innerRadiusBefore;
x2 += widthHalf;
y2 += innerRadiusAfter;
canvas
.moveTo(x0, y0).curveTo(x0 + innerRadiusFirst * CURV, y0, x1, y1 + innerRadiusBefore * CURV, x1, y1)
.lineTo(x2, y2)
.curveTo(x2, y2 - innerRadiusAfter * CURV, x3 + innerRadiusSecond * CURV, y3, x3, y3);
break;
case BOTTOM:
innerRadiusBefore = Math.max(0, horizontalRadius1 - borderWidthBefore);
innerRadiusFirst = Math.max(0, verticalRadius1 - width);
innerRadiusSecond = Math.max(0, verticalRadius2 - width);
innerRadiusAfter = Math.max(0, horizontalRadius2 - borderWidthAfter);
x0 += borderWidthBefore / 2;
y0 += innerRadiusFirst;
x3 -= borderWidthAfter / 2;
y3 += innerRadiusSecond;
clipPoint1 = getIntersectionPoint(new Point(x1 + borderWidthBefore, y1 - width), new Point(x1, y1), new Point(x0, y0), new Point(x0 - 10, y0));
clipPoint2 = getIntersectionPoint(new Point(x2 - borderWidthAfter, y2 - width), new Point(x2, y2), new Point(x3, y3), new Point(x3 + 10, y3));
if (clipPoint1.x < clipPoint2.x) {
clipPoint = getIntersectionPoint(new Point(x1 + borderWidthBefore, y1 - width), clipPoint1, clipPoint2, new Point(x2 - borderWidthAfter, y2 - width));
canvas.moveTo(x1 + borderWidthBefore, y1 - width).lineTo(clipPoint.x, clipPoint.y).lineTo(x2 - borderWidthAfter, y2 - width).lineTo(x1 + borderWidthBefore, y1 - width);
} else {
canvas.moveTo(x1 + borderWidthBefore, y1 - width).lineTo(clipPoint1.x, clipPoint1.y).lineTo(clipPoint2.x, clipPoint2.y).lineTo(x2 - borderWidthAfter, y2 - width).lineTo(x1 + borderWidthBefore, y1 - width);
}
canvas.clip().endPath();
x1 -= innerRadiusBefore;
y1 -= widthHalf;
x2 += innerRadiusAfter;
y2 -= widthHalf;
canvas
.moveTo(x0, y0).curveTo(x0, y0 - innerRadiusFirst * CURV, x1 + innerRadiusBefore * CURV, y1, x1, y1)
.lineTo(x2, y2)
.curveTo(x2 - innerRadiusAfter * CURV, y2, x3, y3 - innerRadiusSecond * CURV, x3, y3);
break;
case LEFT:
innerRadiusBefore = Math.max(0, verticalRadius1 - borderWidthBefore);
innerRadiusFirst = Math.max(0, horizontalRadius1 - width);
innerRadiusSecond = Math.max(0, horizontalRadius2 - width);
innerRadiusAfter = Math.max(0, verticalRadius2 - borderWidthAfter);
x0 += innerRadiusFirst;
y0 -= borderWidthBefore / 2;
x3 += innerRadiusSecond;
y3 += borderWidthAfter / 2;
clipPoint1 = getIntersectionPoint(new Point(x1 - width, y1 - borderWidthBefore), new Point(x1, y1), new Point(x0, y0), new Point(x0, y0 + 10));
clipPoint2 = getIntersectionPoint(new Point(x2 - width, y2 + borderWidthAfter), new Point(x2, y2), new Point(x3, y3), new Point(x3, y3 + 10));
if (clipPoint1.y > clipPoint2.y) {
clipPoint = getIntersectionPoint(new Point(x1 - width, y1 - borderWidthBefore), clipPoint1, clipPoint2, new Point(x2 - width, y2 + borderWidthAfter));
canvas.moveTo(x1 - width, y1 - borderWidthBefore).lineTo(clipPoint.x, clipPoint.y).lineTo(x2 - width, y2 + borderWidthAfter).lineTo(x1 - width, y1 - borderWidthBefore);
} else {
canvas.moveTo(x1 - width, y1 - borderWidthBefore).lineTo(clipPoint1.x, clipPoint1.y).lineTo(clipPoint2.x, clipPoint2.y).lineTo(x2 - width, y2 + borderWidthAfter).lineTo(x1 - width, y1 - borderWidthBefore);
}
canvas.clip().endPath();
x1 -= widthHalf;
y1 += innerRadiusBefore;
x2 -= widthHalf;
y2 -= innerRadiusAfter;
canvas
.moveTo(x0, y0).curveTo(x0 - innerRadiusFirst * CURV, y0, x1, y1 - innerRadiusBefore * CURV, x1, y1)
.lineTo(x2, y2)
.curveTo(x2, y2 + innerRadiusAfter * CURV, x3 - innerRadiusSecond * CURV, y3, x3, y3);
break;
default:
break;
}
canvas
.stroke()
.restoreState();
}
/**
* Calculate adjusted starting points for discontinuous borders, given two opposing points (A and B) that define the bounding rectangle
*
* @param x1 x-coordinate of point A
* @param y1 y-ordinate of point A
* @param x2 x-coordinate of point B
* @param y2 y-ordinate of point B
* @param defaultSide default side of the border used to determine the side given by points A and B
* @return float[] containing the adjusted starting points in the form {x1,y1,x2,y2}
*/
protected float[] getStartingPointsForBorderSide(float x1, float y1, float x2, float y2, Side defaultSide) {
float widthHalf = width / 2;
Border.Side borderSide = getBorderSide(x1, y1, x2, y2, defaultSide);
switch (borderSide) {
case TOP:
y1 += widthHalf;
y2 += widthHalf;
break;
case RIGHT:
x1 += widthHalf;
x2 += widthHalf;
break;
case BOTTOM:
y1 -= widthHalf;
y2 -= widthHalf;
break;
case LEFT:
x1 -= widthHalf;
x2 -= widthHalf;
break;
default:
break;
}
return new float[]{x1, y1, x2, y2};
}
}