com.itextpdf.text.pdf.PdfLine 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
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* following permission added to Section 15 as permitted in Section 7(a):
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*
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* Section 5 of the GNU Affero General Public License.
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* 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
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package com.itextpdf.text.pdf;
import com.itextpdf.text.*;
import java.util.ArrayList;
import java.util.Iterator;
/**
* PdfLine defines an array with PdfChunk-objects
* that fit into 1 line.
*/
public class PdfLine {
// membervariables
/** The arraylist containing the chunks. */
protected ArrayList line;
/** The left indentation of the line. */
protected float left;
/** The width of the line. */
protected float width;
/** The alignment of the line. */
protected int alignment;
/** The height of the line. */
protected float height;
/** The listsymbol (if necessary). */
// protected Chunk listSymbol = null;
/** The listsymbol (if necessary). */
// protected float symbolIndent;
/** true if the chunk splitting was caused by a newline. */
protected boolean newlineSplit = false;
/** The original width. */
protected float originalWidth;
protected boolean isRTL = false;
protected ListItem listItem = null;
protected TabStop tabStop = null;
protected float tabStopAnchorPosition = Float.NaN;
protected float tabPosition = Float.NaN;
// constructors
/**
* Constructs a new PdfLine-object.
*
* @param left the limit of the line at the left
* @param right the limit of the line at the right
* @param alignment the alignment of the line
* @param height the height of the line
*/
PdfLine(float left, float right, int alignment, float height) {
this.left = left;
this.width = right - left;
this.originalWidth = this.width;
this.alignment = alignment;
this.height = height;
this.line = new ArrayList();
}
/**
* Creates a PdfLine object.
* @param left the left offset
* @param originalWidth the original width of the line
* @param remainingWidth bigger than 0 if the line isn't completely filled
* @param alignment the alignment of the line
* @param newlineSplit was the line splitted (or does the paragraph end with this line)
* @param line an array of PdfChunk objects
* @param isRTL do you have to read the line from Right to Left?
*/
PdfLine(float left, float originalWidth, float remainingWidth, int alignment, boolean newlineSplit, ArrayList line, boolean isRTL) {
this.left = left;
this.originalWidth = originalWidth;
this.width = remainingWidth;
this.alignment = alignment;
this.line = line;
this.newlineSplit = newlineSplit;
this.isRTL = isRTL;
}
// methods
/**
* Adds a PdfChunk to the PdfLine.
*
* @param chunk the PdfChunk to add
* @param currentLeading new value for the height of the line
* @return null if the chunk could be added completely; if not
* a PdfChunk containing the part of the chunk that could
* not be added is returned
*/
PdfChunk add(PdfChunk chunk, float currentLeading) {
//we set line height to correspond to the current leading
if (chunk != null && !chunk.toString().equals("")) {
//whitespace shouldn't change leading
if (!chunk.toString().equals(" ")) {
if (this.height < currentLeading || this.line.isEmpty())
this.height = currentLeading;
}
}
return add(chunk);
}
/**
* Adds a PdfChunk to the PdfLine.
*
* @param chunk the PdfChunk to add
* @return null if the chunk could be added completely; if not
* a PdfChunk containing the part of the chunk that could
* not be added is returned
*/
PdfChunk add(PdfChunk chunk) {
// nothing happens if the chunk is null.
if (chunk == null || chunk.toString().equals("")) {
return null;
}
// we split the chunk to be added
PdfChunk overflow = chunk.split(width);
newlineSplit = chunk.isNewlineSplit() || overflow == null;
if (chunk.isTab()) {
Object[] tab = (Object[])chunk.getAttribute(Chunk.TAB);
if (chunk.isAttribute(Chunk.TABSETTINGS)) {
boolean isWhiteSpace = (Boolean)tab[1];
if (!isWhiteSpace || !line.isEmpty()) {
flush();
tabStopAnchorPosition = Float.NaN;
tabStop = PdfChunk.getTabStop(chunk, originalWidth - width);
if (tabStop.getPosition() > originalWidth) {
if (isWhiteSpace)
overflow = null;
else if (Math.abs(originalWidth - width) < 0.001) {
addToLine(chunk);
overflow = null;
} else {
overflow = chunk;
}
width = 0;
} else {
chunk.setTabStop(tabStop);
if (!isRTL && tabStop.getAlignment() == TabStop.Alignment.LEFT) {
width = originalWidth - tabStop.getPosition();
tabStop = null;
tabPosition = Float.NaN;
} else
tabPosition = originalWidth - width;
addToLine(chunk);
}
} else
return null;
} else {
//Keep deprecated tab logic for backward compatibility...
Float tabStopPosition = ((Float)tab[1]).floatValue();
boolean newline = ((Boolean)tab[2]).booleanValue();
if (newline && tabStopPosition < originalWidth - width) {
return chunk;
}
chunk.adjustLeft(left);
width = originalWidth - tabStopPosition;
addToLine(chunk);
}
}
// if the length of the chunk > 0 we add it to the line
else if (chunk.length() > 0 || chunk.isImage()) {
if (overflow != null)
chunk.trimLastSpace();
width -= chunk.width();
addToLine(chunk);
}
// if the length == 0 and there were no other chunks added to the line yet,
// we risk to end up in an endless loop trying endlessly to add the same chunk
else if (line.size() < 1) {
chunk = overflow;
overflow = chunk.truncate(width);
width -= chunk.width();
if (chunk.length() > 0) {
addToLine(chunk);
return overflow;
}
// if the chunk couldn't even be truncated, we add everything, so be it
else {
if (overflow != null)
addToLine(overflow);
return null;
}
}
else {
width += (line.get(line.size() - 1)).trimLastSpace();
}
return overflow;
}
private void addToLine(PdfChunk chunk) {
if (chunk.changeLeading) {
float f;
if (chunk.isImage()) {
Image img = chunk.getImage();
f = chunk.getImageHeight() + chunk.getImageOffsetY()
+ img.getBorderWidthTop() + img.getSpacingBefore();
}
else {
f = chunk.getLeading();
}
if (f > height) height = f;
}
if (tabStop != null && tabStop.getAlignment() == TabStop.Alignment.ANCHOR && Float.isNaN(tabStopAnchorPosition)) {
String value = chunk.toString();
int anchorIndex = value.indexOf(tabStop.getAnchorChar());
if (anchorIndex != -1) {
float subWidth = chunk.width(value.substring(anchorIndex, value.length()));
tabStopAnchorPosition = originalWidth - width - subWidth;
}
}
line.add(chunk);
}
// methods to retrieve information
/**
* Returns the number of chunks in the line.
*
* @return a value
*/
public int size() {
return line.size();
}
/**
* Returns an iterator of PdfChunks.
*
* @return an Iterator
*/
public Iterator iterator() {
return line.iterator();
}
/**
* Returns the height of the line.
*
* @return a value
*/
float height() {
return height;
}
/**
* Returns the left indentation of the line taking the alignment of the line into account.
*
* @return a value
*/
float indentLeft() {
if (isRTL) {
switch (alignment) {
case Element.ALIGN_CENTER:
return left + width / 2f;
case Element.ALIGN_RIGHT:
return left;
case Element.ALIGN_JUSTIFIED:
return left + (hasToBeJustified() ? 0 : width);
case Element.ALIGN_LEFT:
default:
return left + width;
}
} else if (this.getSeparatorCount() <= 0) {
switch (alignment) {
case Element.ALIGN_RIGHT:
return left + width;
case Element.ALIGN_CENTER:
return left + width / 2f;
}
}
return left;
}
/**
* Checks if this line has to be justified.
*
* @return true if the alignment equals ALIGN_JUSTIFIED and there is some width left.
*/
public boolean hasToBeJustified() {
return ((alignment == Element.ALIGN_JUSTIFIED && !newlineSplit) || alignment == Element.ALIGN_JUSTIFIED_ALL) && width != 0;
}
/**
* Resets the alignment of this line.
*
* The alignment of the last line of for instance a Paragraph
* that has to be justified, has to be reset to ALIGN_LEFT.
*/
public void resetAlignment() {
if (alignment == Element.ALIGN_JUSTIFIED) {
alignment = Element.ALIGN_LEFT;
}
}
/** Adds extra indentation to the left (for Paragraph.setFirstLineIndent). */
void setExtraIndent(float extra) {
left += extra;
width -= extra;
originalWidth -= extra;
}
/**
* Returns the width that is left, after a maximum of characters is added to the line.
*
* @return a value
*/
float widthLeft() {
return width;
}
/**
* Returns the number of space-characters in this line.
*
* @return a value
*/
int numberOfSpaces() {
int numberOfSpaces = 0;
for (PdfChunk pdfChunk : line) {
String tmp = pdfChunk.toString();
int length = tmp.length();
for (int i = 0; i < length; i++) {
if (tmp.charAt(i) == ' ') {
numberOfSpaces++;
}
}
}
return numberOfSpaces;
}
/**
* Sets the listsymbol of this line.
*
* This is only necessary for the first line of a ListItem.
*
* @param listItem the list symbol
*/
public void setListItem(ListItem listItem) {
this.listItem = listItem;
// this.listSymbol = listItem.getListSymbol();
// this.symbolIndent = listItem.getIndentationLeft();
}
/**
* Returns the listsymbol of this line.
*
* @return a PdfChunk if the line has a listsymbol; null otherwise
*/
public Chunk listSymbol() {
return listItem != null ? listItem.getListSymbol() : null;
}
/**
* Return the indentation needed to show the listsymbol.
*
* @return a value
*/
public float listIndent() {
return listItem != null ? listItem.getIndentationLeft() : 0;
}
public ListItem listItem() {
return listItem;
}
/**
* Get the string representation of what is in this line.
*
* @return a String
*/
@Override
public String toString() {
StringBuffer tmp = new StringBuffer();
for (PdfChunk pdfChunk : line) {
tmp.append((pdfChunk).toString());
}
return tmp.toString();
}
/**
* Returns the length of a line in UTF32 characters
* @return the length in UTF32 characters
* @since 2.1.2; Get changed into get in 5.0.2
*/
public int getLineLengthUtf32() {
int total = 0;
for (Object element : line) {
total += ((PdfChunk)element).lengthUtf32();
}
return total;
}
/**
* Checks if a newline caused the line split.
* @return true if a newline caused the line split
*/
public boolean isNewlineSplit() {
return newlineSplit && alignment != Element.ALIGN_JUSTIFIED_ALL;
}
/**
* Gets the index of the last PdfChunk with metric attributes
* @return the last PdfChunk with metric attributes
*/
public int getLastStrokeChunk() {
int lastIdx = line.size() - 1;
for (; lastIdx >= 0; --lastIdx) {
PdfChunk chunk = line.get(lastIdx);
if (chunk.isStroked())
break;
}
return lastIdx;
}
/**
* Gets a PdfChunk by index.
* @param idx the index
* @return the PdfChunk or null if beyond the array
*/
public PdfChunk getChunk(int idx) {
if (idx < 0 || idx >= line.size())
return null;
return line.get(idx);
}
/**
* Gets the original width of the line.
* @return the original width of the line
*/
public float getOriginalWidth() {
return originalWidth;
}
/*
* Gets the maximum size of all the fonts used in this line
* including images.
* @return maximum size of all the fonts used in this line
float getMaxSizeSimple() {
float maxSize = 0;
PdfChunk chunk;
for (int k = 0; k < line.size(); ++k) {
chunk = (PdfChunk)line.get(k);
if (!chunk.isImage()) {
maxSize = Math.max(chunk.font().size(), maxSize);
}
else {
maxSize = Math.max(chunk.getImage().getScaledHeight() + chunk.getImageOffsetY() , maxSize);
}
}
return maxSize;
}*/
/**
* Gets the difference between the "normal" leading and the maximum
* size (for instance when there are images in the chunk and the leading
* has to be taken into account).
* @return an extra leading for images
* @since 2.1.5
*/
float[] getMaxSize(float fixedLeading, float multipliedLeading) {
float normal_leading = 0;
float image_leading = -10000;
PdfChunk chunk;
for (int k = 0; k < line.size(); ++k) {
chunk = line.get(k);
if (chunk.isImage()) {
Image img = chunk.getImage();
if (chunk.changeLeading()) {
float height = chunk.getImageHeight() + chunk.getImageOffsetY() + img.getSpacingBefore();
image_leading = Math.max(height, image_leading);
}
} else {
if (chunk.changeLeading())
normal_leading = Math.max(chunk.getLeading(), normal_leading);
else
normal_leading = Math.max(fixedLeading + multipliedLeading * chunk.font().size(), normal_leading);
}
}
return new float[]{normal_leading > 0 ? normal_leading : fixedLeading, image_leading};
}
boolean isRTL() {
return isRTL;
}
/**
* Gets the number of separators in the line.
* Returns -1 if there's a tab in the line.
* @return the number of separators in the line
* @since 2.1.2
*/
int getSeparatorCount() {
int s = 0;
PdfChunk ck;
for (Object element : line) {
ck = (PdfChunk)element;
if (ck.isTab()) {
if (ck.isAttribute(Chunk.TABSETTINGS))
continue;
//It seems justification was forbidden in the deprecated tab logic!!!
return -1;
}
if (ck.isHorizontalSeparator()) {
s++;
}
}
return s;
}
/**
* Gets a width corrected with a charSpacing and wordSpacing.
* @param charSpacing
* @param wordSpacing
* @return a corrected width
*/
public float getWidthCorrected(float charSpacing, float wordSpacing) {
float total = 0;
for (int k = 0; k < line.size(); ++k) {
PdfChunk ck = line.get(k);
total += ck.getWidthCorrected(charSpacing, wordSpacing);
}
return total;
}
/**
* Gets the maximum size of the ascender for all the fonts used
* in this line.
* @return maximum size of all the ascenders used in this line
*/
public float getAscender() {
float ascender = 0;
for (int k = 0; k < line.size(); ++k) {
PdfChunk ck = line.get(k);
if (ck.isImage())
ascender = Math.max(ascender, ck.getImageHeight() + ck.getImageOffsetY());
else {
PdfFont font = ck.font();
float textRise = ck.getTextRise();
ascender = Math.max(ascender, (textRise > 0 ? textRise : 0) + font.getFont().getFontDescriptor(BaseFont.ASCENT, font.size()));
}
}
return ascender;
}
/**
* Gets the biggest descender for all the fonts used
* in this line. Note that this is a negative number.
* @return maximum size of all the descenders used in this line
*/
public float getDescender() {
float descender = 0;
for (int k = 0; k < line.size(); ++k) {
PdfChunk ck = line.get(k);
if (ck.isImage())
descender = Math.min(descender, ck.getImageOffsetY());
else {
PdfFont font = ck.font();
float textRise = ck.getTextRise();
descender = Math.min(descender, (textRise < 0 ? textRise : 0) + font.getFont().getFontDescriptor(BaseFont.DESCENT, font.size()));
}
}
return descender;
}
public void flush() {
if (tabStop != null) {
float textWidth = originalWidth - width - tabPosition;
float tabStopPosition = tabStop.getPosition(tabPosition, originalWidth - width, tabStopAnchorPosition);
width = originalWidth - tabStopPosition - textWidth;
if (width < 0)
tabStopPosition += width;
if (!isRTL)
tabStop.setPosition(tabStopPosition);
else
tabStop.setPosition(originalWidth - width - tabPosition);
tabStop = null;
tabPosition = Float.NaN;
}
}
}