com.itextpdf.layout.borders.Border Maven / Gradle / Ivy
/*
This file is part of the iText (R) project.
Copyright (c) 1998-2023 Apryse Group NV
Authors: Apryse Software.
This program is offered under a commercial and under the AGPL license.
For commercial licensing, contact us at https://itextpdf.com/sales. For AGPL licensing, see below.
AGPL licensing:
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU Affero General Public License as published by
the Free Software Foundation, either version 3 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 Affero General Public License for more details.
You should have received a copy of the GNU Affero General Public License
along with this program. If not, see
* 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);
/**
* Draw borders around the target rectangle.
*
* @param canvas PdfCanvas to be written to
* @param rectangle border positions rectangle
*/
public void draw(PdfCanvas canvas, Rectangle rectangle) {
float left = rectangle.getX();
float bottom = rectangle.getY();
float right = rectangle.getX() + rectangle.getWidth();
float top = rectangle.getY() + rectangle.getHeight();
draw(canvas, left, top, right, top, Side.TOP, width, width);
draw(canvas, right, top, right, bottom, Side.RIGHT, width, width);
draw(canvas, right, bottom, left, bottom, Side.BOTTOM, width, width);
draw(canvas, left, bottom, left, top, Side.LEFT, 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.
*
* 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(
IoLogMessageConstant.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
}
/**
* Gets a {@link Point} in which two lines intersect.
*
* @param lineBeg a {@link Point} which defines some point on the first line
* @param lineEnd a {@link Point} which defines another point on the first line
* @param clipLineBeg a {@link Point} which defines some point on the second line
* @param clipLineEnd a {@link Point} which defines another point on the second line
* @return the intersection {@link Point}
*/
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) {
double x1 = boundingRectangle.getX();
double y1 = boundingRectangle.getY();
double x2 = boundingRectangle.getRight();
double y2 = boundingRectangle.getTop();
final double horizontalRadius1 = horizontalRadii[0];
final double horizontalRadius2 = horizontalRadii[1];
final double verticalRadius1 = verticalRadii[0];
final double verticalRadius2 = verticalRadii[1];
// Points (x0, y0) and (x3, y3) are used to produce Bezier curve
double x0 = boundingRectangle.getX();
double y0 = boundingRectangle.getY();
double x3 = boundingRectangle.getRight();
double y3 = boundingRectangle.getTop();
double innerRadiusBefore;
double innerRadiusFirst;
double innerRadiusSecond;
double innerRadiusAfter;
final double widthHalf = width / 2.0;
Point clipPoint1;
Point clipPoint2;
Point clipPoint;
final Border.Side borderSide = getBorderSide((float) x1, (float) y1, (float) x2, (float) 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
.arc(x0, y0 - innerRadiusFirst,
x1 + innerRadiusBefore, y1,
ARC_LEFT_DEGREE, ARC_QUARTER_CLOCKWISE_EXTENT)
.arcContinuous(x2 - innerRadiusAfter, y2,
x3, y3 - innerRadiusSecond,
ARC_TOP_DEGREE, ARC_QUARTER_CLOCKWISE_EXTENT);
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
.arc(x0 - innerRadiusFirst, y0,
x1, y1 - innerRadiusBefore,
ARC_TOP_DEGREE, ARC_QUARTER_CLOCKWISE_EXTENT)
.arcContinuous(x2, y2 + innerRadiusAfter,
x3 - innerRadiusSecond, y3,
ARC_RIGHT_DEGREE, ARC_QUARTER_CLOCKWISE_EXTENT);
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
.arc(x0, y0 + innerRadiusFirst,
x1 - innerRadiusBefore, y1,
ARC_RIGHT_DEGREE, ARC_QUARTER_CLOCKWISE_EXTENT)
.arcContinuous(x2 + innerRadiusAfter, y2,
x3, y3 + innerRadiusSecond,
ARC_BOTTOM_DEGREE, ARC_QUARTER_CLOCKWISE_EXTENT);
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
.arc(x0 + innerRadiusFirst, y0,
x1, y1 + innerRadiusBefore,
ARC_BOTTOM_DEGREE, ARC_QUARTER_CLOCKWISE_EXTENT)
.arcContinuous(x2, y2 - innerRadiusAfter,
x3 + innerRadiusSecond, y3,
ARC_LEFT_DEGREE, ARC_QUARTER_CLOCKWISE_EXTENT);
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};
}
}