iText layout.jar Source Code
layout.jar is a component in iText Java library to provide layout functionalities.
iText Java library allows you to generate and manage PDF documents.
The Source Code files are provided together with the JAR file in the binary packge like iText7-Core-7.1.4.zip. You can download it at iText 7 Core Download site.
You can compile it to generate your JAR file, using layout.pom as the build configuration file.
The source code of layout-7.1.4.jar is provided below:
✍: FYIcenter.com
⏎ com/itextpdf/layout/renderer/ImageRenderer.java
/*
This file is part of the iText (R) project.
Copyright (c) 1998-2018 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
OF THIRD PARTY RIGHTS
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 http://www.gnu.org/licenses or write to
the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
Boston, MA, 02110-1301 USA, or download the license from the following URL:
http://itextpdf.com/terms-of-use/
The interactive user interfaces in modified source and object code versions
of this program must display Appropriate Legal Notices, as required under
Section 5 of the GNU Affero General Public License.
In accordance with Section 7(b) of the GNU Affero General Public License,
a covered work must retain the producer line in every PDF that is created
or manipulated using iText.
You can be released from the requirements of the license by purchasing
a commercial license. Buying such a license is mandatory as soon as you
develop commercial activities involving the iText software without
disclosing the source code of your own applications.
These activities include: offering paid services to customers as an ASP,
serving PDFs on the fly in a web application, shipping iText with a closed
source product.
For more information, please contact iText Software Corp. at this
address: sales@itextpdf.com
*/
package com.itextpdf.layout.renderer;
import com.itextpdf.io.LogMessageConstant;
import com.itextpdf.kernel.geom.AffineTransform;
import com.itextpdf.kernel.geom.Point;
import com.itextpdf.kernel.geom.Rectangle;
import com.itextpdf.kernel.pdf.canvas.CanvasArtifact;
import com.itextpdf.kernel.pdf.canvas.PdfCanvas;
import com.itextpdf.kernel.pdf.tagutils.TagTreePointer;
import com.itextpdf.kernel.pdf.xobject.PdfFormXObject;
import com.itextpdf.kernel.pdf.xobject.PdfImageXObject;
import com.itextpdf.kernel.pdf.xobject.PdfXObject;
import com.itextpdf.layout.borders.Border;
import com.itextpdf.layout.element.Image;
import com.itextpdf.layout.layout.LayoutArea;
import com.itextpdf.layout.layout.LayoutContext;
import com.itextpdf.layout.layout.LayoutResult;
import com.itextpdf.layout.layout.MinMaxWidthLayoutResult;
import com.itextpdf.layout.minmaxwidth.MinMaxWidth;
import com.itextpdf.layout.minmaxwidth.MinMaxWidthUtils;
import com.itextpdf.layout.property.FloatPropertyValue;
import com.itextpdf.layout.property.OverflowPropertyValue;
import com.itextpdf.layout.property.Property;
import com.itextpdf.layout.property.UnitValue;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import com.itextpdf.io.util.MessageFormatUtil;
import com.itextpdf.layout.tagging.LayoutTaggingHelper;
import java.util.List;
public class ImageRenderer extends AbstractRenderer implements ILeafElementRenderer {
protected Float fixedXPosition;
protected Float fixedYPosition;
protected float pivotY;
protected float deltaX;
protected float imageWidth;
protected float imageHeight;
float[] matrix = new float[6];
private Float height;
private Float width;
private Rectangle initialOccupiedAreaBBox;
private float rotatedDeltaX;
private float rotatedDeltaY;
/**
* Creates an ImageRenderer from its corresponding layout object.
*
* @param image the {@link com.itextpdf.layout.element.Image} which this object should manage
*/
public ImageRenderer(Image image) {
super(image);
}
@Override
public LayoutResult layout(LayoutContext layoutContext) {
LayoutArea area = layoutContext.getArea().clone();
Rectangle layoutBox = area.getBBox().clone();
AffineTransform t = new AffineTransform();
Image modelElement = (Image) (getModelElement());
PdfXObject xObject = modelElement.getXObject();
imageWidth = modelElement.getImageWidth();
imageHeight = modelElement.getImageHeight();
calculateImageDimensions(layoutBox, t, xObject);
OverflowPropertyValue overflowX = null != parent
? parent.<OverflowPropertyValue>getProperty(Property.OVERFLOW_X)
: OverflowPropertyValue.FIT;
List<Rectangle> floatRendererAreas = layoutContext.getFloatRendererAreas();
float clearHeightCorrection = FloatingHelper.calculateClearHeightCorrection(this, floatRendererAreas, layoutBox);
FloatPropertyValue floatPropertyValue = this.<FloatPropertyValue>getProperty(Property.FLOAT);
if (FloatingHelper.isRendererFloating(this, floatPropertyValue)) {
layoutBox.decreaseHeight(clearHeightCorrection);
FloatingHelper.adjustFloatedBlockLayoutBox(this, layoutBox, width, floatRendererAreas, floatPropertyValue, overflowX);
} else {
clearHeightCorrection = FloatingHelper.adjustLayoutBoxAccordingToFloats(floatRendererAreas, layoutBox, width, clearHeightCorrection, null);
}
applyMargins(layoutBox, false);
Border[] borders = getBorders();
applyBorderBox(layoutBox, borders, false);
Float declaredMaxHeight = retrieveMaxHeight();
OverflowPropertyValue overflowY = null == parent
|| ((null == declaredMaxHeight || declaredMaxHeight > layoutBox.getHeight())
&& !layoutContext.isClippedHeight())
? OverflowPropertyValue.FIT
: parent.<OverflowPropertyValue>getProperty(Property.OVERFLOW_Y);
boolean processOverflowX = !isOverflowFit(overflowX);
boolean processOverflowY = !isOverflowFit(overflowY);
if (isAbsolutePosition()) {
applyAbsolutePosition(layoutBox);
}
occupiedArea = new LayoutArea(area.getPageNumber(), new Rectangle(layoutBox.getX(), layoutBox.getY() + layoutBox.getHeight(), 0, 0));
float imageItselfScaledWidth = (float) width;
float imageItselfScaledHeight = (float) height;
if (isFixedLayout()) {
fixedXPosition = this.getPropertyAsFloat(Property.LEFT);
fixedYPosition = this.getPropertyAsFloat(Property.BOTTOM);
}
Float angle = this.getPropertyAsFloat(Property.ROTATION_ANGLE);
// See in adjustPositionAfterRotation why angle = 0 is necessary
if (null == angle) {
angle = 0f;
}
t.rotate((float) angle);
initialOccupiedAreaBBox = getOccupiedAreaBBox().clone();
float scaleCoef = adjustPositionAfterRotation((float) angle, layoutBox.getWidth(), layoutBox.getHeight());
imageItselfScaledHeight *= scaleCoef;
imageItselfScaledWidth *= scaleCoef;
initialOccupiedAreaBBox.moveDown(imageItselfScaledHeight);
initialOccupiedAreaBBox.setHeight(imageItselfScaledHeight);
initialOccupiedAreaBBox.setWidth(imageItselfScaledWidth);
if (xObject instanceof PdfFormXObject) {
t.scale(scaleCoef, scaleCoef);
}
getMatrix(t, imageItselfScaledWidth, imageItselfScaledHeight);
// indicates whether the placement is forced
boolean isPlacingForced = false;
if (width > layoutBox.getWidth() || height > layoutBox.getHeight()) {
if (Boolean.TRUE.equals(getPropertyAsBoolean(Property.FORCED_PLACEMENT)) || (width > layoutBox.getWidth() && processOverflowX) || (height > layoutBox.getHeight() && processOverflowY)) {
isPlacingForced = true;
} else {
occupiedArea.getBBox().setHeight(initialOccupiedAreaBBox.getHeight());
return new MinMaxWidthLayoutResult(LayoutResult.NOTHING, occupiedArea, null, this, this);
}
}
occupiedArea.getBBox().moveDown((float) height);
if (borders[3] != null) {
height += (float) Math.sin((float) angle) * borders[3].getWidth();
}
occupiedArea.getBBox().setHeight((float) height);
occupiedArea.getBBox().setWidth((float) width);
UnitValue leftMargin = this.getPropertyAsUnitValue(Property.MARGIN_LEFT);
if (!leftMargin.isPointValue()) {
Logger logger = LoggerFactory.getLogger(ImageRenderer.class);
logger.error(MessageFormatUtil.format(LogMessageConstant.PROPERTY_IN_PERCENTS_NOT_SUPPORTED, Property.MARGIN_LEFT));
}
UnitValue topMargin = this.getPropertyAsUnitValue(Property.MARGIN_TOP);
if (!topMargin.isPointValue()) {
Logger logger = LoggerFactory.getLogger(ImageRenderer.class);
logger.error(MessageFormatUtil.format(LogMessageConstant.PROPERTY_IN_PERCENTS_NOT_SUPPORTED, Property.MARGIN_TOP));
}
if (0 != leftMargin.getValue() || 0 != topMargin.getValue()) {
translateImage(leftMargin.getValue(), topMargin.getValue(), t);
getMatrix(t, imageItselfScaledWidth, imageItselfScaledHeight);
}
applyBorderBox(occupiedArea.getBBox(), borders, true);
applyMargins(occupiedArea.getBBox(), true);
if (angle != 0) {
applyRotationLayout((float) angle);
}
float unscaledWidth = occupiedArea.getBBox().getWidth() / scaleCoef;
MinMaxWidth minMaxWidth = new MinMaxWidth(unscaledWidth, unscaledWidth, 0);
UnitValue rendererWidth = this.<UnitValue>getProperty(Property.WIDTH);
if (rendererWidth != null && rendererWidth.isPercentValue()) {
minMaxWidth.setChildrenMinWidth(0);
float coeff = imageWidth / (float) retrieveWidth(area.getBBox().getWidth());
minMaxWidth.setChildrenMaxWidth(unscaledWidth * coeff);
} else {
boolean autoScale = hasProperty(Property.AUTO_SCALE) && (boolean) this.<Boolean>getProperty(Property.AUTO_SCALE);
boolean autoScaleWidth = hasProperty(Property.AUTO_SCALE_WIDTH) && (boolean) this.<Boolean>getProperty(Property.AUTO_SCALE_WIDTH);
if (autoScale || autoScaleWidth) {
minMaxWidth.setChildrenMinWidth(0);
}
}
FloatingHelper.removeFloatsAboveRendererBottom(floatRendererAreas, this);
LayoutArea editedArea = FloatingHelper.adjustResultOccupiedAreaForFloatAndClear(this, floatRendererAreas, layoutContext.getArea().getBBox(), clearHeightCorrection, false);
applyAbsolutePositionIfNeeded(layoutContext);
return new MinMaxWidthLayoutResult(LayoutResult.FULL, editedArea, null, null, isPlacingForced ? this : null)
.setMinMaxWidth(minMaxWidth);
}
@Override
public void draw(DrawContext drawContext) {
if (occupiedArea == null) {
Logger logger = LoggerFactory.getLogger(ImageRenderer.class);
logger.error(MessageFormatUtil.format(LogMessageConstant.OCCUPIED_AREA_HAS_NOT_BEEN_INITIALIZED, "Drawing won't be performed."));
return;
}
applyMargins(occupiedArea.getBBox(), false);
applyBorderBox(occupiedArea.getBBox(), getBorders(), false);
boolean isRelativePosition = isRelativePosition();
if (isRelativePosition) {
applyRelativePositioningTranslation(false);
}
if (fixedYPosition == null) {
fixedYPosition = occupiedArea.getBBox().getY() + pivotY;
}
if (fixedXPosition == null) {
fixedXPosition = occupiedArea.getBBox().getX();
}
boolean isTagged = drawContext.isTaggingEnabled();
LayoutTaggingHelper taggingHelper = null;
boolean isArtifact = false;
TagTreePointer tagPointer = null;
if (isTagged) {
taggingHelper = this.<LayoutTaggingHelper>getProperty(Property.TAGGING_HELPER);
if (taggingHelper == null) {
isArtifact = true;
} else {
isArtifact = taggingHelper.isArtifact(this);
if (!isArtifact) {
tagPointer = taggingHelper.useAutoTaggingPointerAndRememberItsPosition(this);
if (taggingHelper.createTag(this, tagPointer)) {
tagPointer.getProperties().addAttributes(0, AccessibleAttributesApplier.getLayoutAttributes(this, tagPointer));
}
}
}
}
beginTransformationIfApplied(drawContext.getCanvas());
Float angle = this.getPropertyAsFloat(Property.ROTATION_ANGLE);
if (angle != null) {
fixedXPosition += rotatedDeltaX;
fixedYPosition -= rotatedDeltaY;
drawContext.getCanvas().saveState();
applyConcatMatrix(drawContext, angle);
}
super.draw(drawContext);
if (angle != null) {
drawContext.getCanvas().restoreState();
}
PdfCanvas canvas = drawContext.getCanvas();
if (isTagged) {
if (isArtifact) {
canvas.openTag(new CanvasArtifact());
} else {
canvas.openTag(tagPointer.getTagReference());
}
}
PdfXObject xObject = ((Image) (getModelElement())).getXObject();
beginElementOpacityApplying(drawContext);
canvas.addXObject(xObject, matrix[0], matrix[1], matrix[2], matrix[3], (float) fixedXPosition + deltaX, (float) fixedYPosition);
endElementOpacityApplying(drawContext);
endTransformationIfApplied(drawContext.getCanvas());
if (Boolean.TRUE.equals(getPropertyAsBoolean(Property.FLUSH_ON_DRAW))) {
xObject.flush();
}
if (isTagged) {
canvas.closeTag();
}
if (isRelativePosition) {
applyRelativePositioningTranslation(true);
}
applyBorderBox(occupiedArea.getBBox(), getBorders(), true);
applyMargins(occupiedArea.getBBox(), true);
if (isTagged && !isArtifact) {
taggingHelper.finishTaggingHint(this);
taggingHelper.restoreAutoTaggingPointerPosition(this);
}
}
@Override
public IRenderer getNextRenderer() {
return null;
}
@Override
public Rectangle getBorderAreaBBox() {
applyMargins(initialOccupiedAreaBBox, false);
applyBorderBox(initialOccupiedAreaBBox, getBorders(), false);
boolean isRelativePosition = isRelativePosition();
if (isRelativePosition) {
applyRelativePositioningTranslation(false);
}
applyMargins(initialOccupiedAreaBBox, true);
applyBorderBox(initialOccupiedAreaBBox, true);
return initialOccupiedAreaBBox;
}
@Override
protected Rectangle applyPaddings(Rectangle rect, UnitValue[] paddings, boolean reverse) {
return rect;
}
@Override
public void move(float dxRight, float dyUp) {
super.move(dxRight, dyUp);
if (initialOccupiedAreaBBox != null) {
initialOccupiedAreaBBox.moveRight(dxRight);
initialOccupiedAreaBBox.moveUp(dyUp);
}
if (fixedXPosition != null) {
fixedXPosition += dxRight;
}
if (fixedYPosition != null) {
fixedYPosition += dyUp;
}
}
@Override
protected MinMaxWidth getMinMaxWidth() {
return ((MinMaxWidthLayoutResult) layout(new LayoutContext(new LayoutArea(1, new Rectangle(MinMaxWidthUtils.getInfWidth(), AbstractRenderer.INF))))).getMinMaxWidth();
}
protected ImageRenderer autoScale(LayoutArea layoutArea) {
Rectangle area = layoutArea.getBBox().clone();
applyMargins(area, false);
applyBorderBox(area, false);
// if rotation was applied, width would be equal to the width of rectangle bounding the rotated image
float angleScaleCoef = imageWidth / (float) width;
if (width > angleScaleCoef * area.getWidth()) {
updateHeight(UnitValue.createPointValue(area.getWidth() / (float)width * imageHeight));
updateWidth(UnitValue.createPointValue(angleScaleCoef * area.getWidth()));
}
return this;
}
private void calculateImageDimensions(Rectangle layoutBox, AffineTransform t, PdfXObject xObject) {
width = this.<UnitValue>getProperty(Property.WIDTH) != null ? retrieveWidth(layoutBox.getWidth()) : null;
Float declaredHeight = retrieveHeight();
height = declaredHeight;
if (width == null && height == null) {
width = imageWidth;
height = (float) width / imageWidth * imageHeight;
} else if (width == null) {
width = (float) height / imageHeight * imageWidth;
} else if (height == null) {
height = (float) width / imageWidth * imageHeight;
}
Float horizontalScaling = this.getPropertyAsFloat(Property.HORIZONTAL_SCALING, 1f);
Float verticalScaling = this.getPropertyAsFloat(Property.VERTICAL_SCALING, 1f);
if (xObject instanceof PdfFormXObject && width != imageWidth) {
horizontalScaling *= width / imageWidth;
verticalScaling *= height / imageHeight;
}
if (horizontalScaling != 1) {
if (xObject instanceof PdfFormXObject) {
t.scale((float) horizontalScaling, 1);
width = imageWidth * (float) horizontalScaling;
} else {
width *= (float) horizontalScaling;
}
}
if (verticalScaling != 1) {
if (xObject instanceof PdfFormXObject) {
t.scale(1, (float) verticalScaling);
height = imageHeight * (float) verticalScaling;
} else {
height *= (float) verticalScaling;
}
}
// Constrain width and height according to min/max width
Float minWidth = retrieveMinWidth(layoutBox.getWidth());
Float maxWidth = retrieveMaxWidth(layoutBox.getWidth());
if (null != minWidth && width < minWidth) {
height *= minWidth / width;
width = minWidth;
} else if (null != maxWidth && width > maxWidth) {
height *= maxWidth / width;
width = maxWidth;
}
// Constrain width and height according to min/max height, which has precedence over width settings
Float minHeight = retrieveMinHeight();
Float maxHeight = retrieveMaxHeight();
if (null != minHeight && height < minHeight) {
width *= minHeight / height;
height = minHeight;
} else if (null != maxHeight && height > maxHeight) {
width *= maxHeight / height;
this.height = maxHeight;
} else if (null != declaredHeight && !height.equals(declaredHeight)) {
width *= declaredHeight / height;
height = declaredHeight;
}
}
private void getMatrix(AffineTransform t, float imageItselfScaledWidth, float imageItselfScaledHeight) {
t.getMatrix(matrix);
PdfXObject xObject = ((Image) (getModelElement())).getXObject();
if (xObject instanceof PdfImageXObject) {
matrix[0] *= imageItselfScaledWidth;
matrix[1] *= imageItselfScaledWidth;
matrix[2] *= imageItselfScaledHeight;
matrix[3] *= imageItselfScaledHeight;
}
}
private float adjustPositionAfterRotation(float angle, float maxWidth, float maxHeight) {
if (angle != 0) {
AffineTransform t = AffineTransform.getRotateInstance(angle);
Point p00 = t.transform(new Point(0, 0), new Point());
Point p01 = t.transform(new Point(0, (float) height), new Point());
Point p10 = t.transform(new Point((float) width, 0), new Point());
Point p11 = t.transform(new Point((float) width, (float) height), new Point());
double[] xValues = {p01.getX(), p10.getX(), p11.getX()};
double[] yValues = {p01.getY(), p10.getY(), p11.getY()};
double minX = p00.getX();
double minY = p00.getY();
double maxX = minX;
double maxY = minY;
for (double x : xValues) {
minX = Math.min(minX, x);
maxX = Math.max(maxX, x);
}
for (double y : yValues) {
minY = Math.min(minY, y);
maxY = Math.max(maxY, y);
}
height = (float) (maxY - minY);
width = (float) (maxX - minX);
pivotY = (float) (p00.getY() - minY);
deltaX = -(float) minX;
}
// Rotating image can cause fitting into area problems.
// So let's find scaling coefficient
float scaleCoeff = 1;
if (Boolean.TRUE.equals(getPropertyAsBoolean(Property.AUTO_SCALE))) {
if (maxWidth / (float) width < maxHeight / (float) height) {
scaleCoeff = maxWidth / (float) width;
height *= maxWidth / (float) width;
width = maxWidth;
} else {
scaleCoeff = maxHeight / (float) height;
width *= maxHeight / (float) height;
height = maxHeight;
}
} else if (Boolean.TRUE.equals(getPropertyAsBoolean(Property.AUTO_SCALE_WIDTH))) {
scaleCoeff = maxWidth / (float) width;
height *= scaleCoeff;
width = maxWidth;
} else if (Boolean.TRUE.equals(getPropertyAsBoolean(Property.AUTO_SCALE_HEIGHT))) {
scaleCoeff = maxHeight / (float) height;
height = maxHeight;
width *= scaleCoeff;
}
pivotY *= scaleCoeff;
deltaX *= scaleCoeff;
return scaleCoeff;
}
private void translateImage(float xDistance, float yDistance, AffineTransform t) {
t.translate(xDistance, yDistance);
t.getMatrix(matrix);
if (fixedXPosition != null) {
fixedXPosition += (float) t.getTranslateX();
}
if (fixedYPosition != null) {
fixedYPosition += (float) t.getTranslateY();
}
}
private void applyConcatMatrix(DrawContext drawContext, Float angle) {
AffineTransform rotationTransform = AffineTransform.getRotateInstance((float) angle);
Rectangle rect = getBorderAreaBBox();
List<Point> rotatedPoints = transformPoints(rectangleToPointsList(rect), rotationTransform);
float[] shift = calculateShiftToPositionBBoxOfPointsAt(rect.getX(), rect.getY() + rect.getHeight(), rotatedPoints);
double[] matrix = new double[6];
rotationTransform.getMatrix(matrix);
drawContext.getCanvas().concatMatrix(matrix[0], matrix[1], matrix[2], matrix[3], shift[0], shift[1]);
}
private void applyRotationLayout(float angle) {
Border[] borders = getBorders();
Rectangle rect = getBorderAreaBBox();
float leftBorderWidth = borders[3] == null ? 0 : borders[3].getWidth();
float rightBorderWidth = borders[1] == null ? 0 : borders[1].getWidth();
float topBorderWidth = borders[0] == null ? 0 : borders[0].getWidth();
if (leftBorderWidth != 0) {
float gip = (float) Math.sqrt(Math.pow(topBorderWidth, 2) + Math.pow(leftBorderWidth, 2));
double atan = Math.atan(topBorderWidth / leftBorderWidth);
if (angle < 0) {
atan = -atan;
}
rotatedDeltaX = Math.abs((float) (gip * Math.cos(angle - atan) - leftBorderWidth));
} else {
rotatedDeltaX = 0;
}
rect.moveRight(rotatedDeltaX);
occupiedArea.getBBox().setWidth(occupiedArea.getBBox().getWidth() + rotatedDeltaX);
if (rightBorderWidth != 0) {
float gip = (float) Math.sqrt(Math.pow(topBorderWidth, 2) + Math.pow(leftBorderWidth, 2));
double atan = Math.atan(rightBorderWidth / topBorderWidth);
if (angle < 0) {
atan = -atan;
}
rotatedDeltaY = Math.abs((float) (gip * Math.cos(angle - atan) - topBorderWidth));
} else {
rotatedDeltaY = 0;
}
rect.moveDown(rotatedDeltaY);
if (angle < 0) {
rotatedDeltaY += rightBorderWidth;
}
occupiedArea.getBBox().increaseHeight(rotatedDeltaY);
}
@Override
public float getAscent() {
return occupiedArea.getBBox().getHeight();
}
@Override
public float getDescent() {
return 0;
}
}
⏎ com/itextpdf/layout/renderer/ImageRenderer.java
Or download all of them as a single archive file:
File name: layout-7.1.4-sources.jar File size: 446816 bytes Release date: 2018-10-09 Download
⇒ iText 5 itextpdf.jar Source Code
2021-07-03, ≈67🔥, 0💬
