/*
* $Id: PdfLine.java 4784 2011-03-15 08:33:00Z blowagie $
*
* This file is part of the iText (R) project.
* Copyright (c) 1998-2011 1T3XT BVBA
* 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 1T3XT,
* 1T3XT 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.text.pdf;
import java.util.ArrayList;
import java.util.Iterator;
import com.itextpdf.text.Chunk;
import com.itextpdf.text.Element;
import com.itextpdf.text.Image;
import com.itextpdf.text.ListItem;
/**
* <CODE>PdfLine</CODE> defines an array with <CODE>PdfChunk</CODE>-objects
* that fit into 1 line.
*/
public class PdfLine {
// membervariables
/** The arraylist containing the chunks. */
protected ArrayList<PdfChunk> 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;
/** <CODE>true</CODE> if the chunk splitting was caused by a newline. */
protected boolean newlineSplit = false;
/** The original width. */
protected float originalWidth;
protected boolean isRTL = false;
// constructors
/**
* Constructs a new <CODE>PdfLine</CODE>-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<PdfChunk>();
}
/**
* 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<PdfChunk> 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 <CODE>PdfChunk</CODE> to the <CODE>PdfLine</CODE>.
*
* @param chunk the <CODE>PdfChunk</CODE> to add
* @return <CODE>null</CODE> if the chunk could be added completely; if not
* a <CODE>PdfChunk</CODE> 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);
float tabPosition = ((Float)tab[1]).floatValue();
boolean newline = ((Boolean)tab[2]).booleanValue();
if (newline && tabPosition < originalWidth - width) {
return chunk;
}
width = originalWidth - tabPosition;
chunk.adjustLeft(left);
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 && chunk.isImage()) {
Image img = chunk.getImage();
float f = img.getScaledHeight() + chunk.getImageOffsetY()
+ img.getBorderWidthTop() + img.getSpacingBefore();
if (f > height) height = f;
}
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 <CODE>PdfChunk</CODE>s.
*
* @return an <CODE>Iterator</CODE>
*/
public Iterator<PdfChunk> 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_LEFT:
return left + width;
case Element.ALIGN_CENTER:
return left + width / 2f;
default:
return left;
}
}
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 <CODE>true</CODE> if the alignment equals <VAR>ALIGN_JUSTIFIED</VAR> and there is some width left.
*/
public boolean hasToBeJustified() {
return (alignment == Element.ALIGN_JUSTIFIED || alignment == Element.ALIGN_JUSTIFIED_ALL) && width != 0;
}
/**
* Resets the alignment of this line.
* <P>
* The alignment of the last line of for instance a <CODE>Paragraph</CODE>
* that has to be justified, has to be reset to <VAR>ALIGN_LEFT</VAR>.
*/
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;
}
/**
* 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() {
String string = toString();
int length = string.length();
int numberOfSpaces = 0;
for (int i = 0; i < length; i++) {
if (string.charAt(i) == ' ') {
numberOfSpaces++;
}
}
return numberOfSpaces;
}
/**
* Sets the listsymbol of this line.
* <P>
* This is only necessary for the first line of a <CODE>ListItem</CODE>.
*
* @param listItem the list symbol
*/
public void setListItem(ListItem listItem) {
this.listSymbol = listItem.getListSymbol();
this.symbolIndent = listItem.getIndentationLeft();
}
/**
* Returns the listsymbol of this line.
*
* @return a <CODE>PdfChunk</CODE> if the line has a listsymbol; <CODE>null</CODE> otherwise
*/
public Chunk listSymbol() {
return listSymbol;
}
/**
* Return the indentation needed to show the listsymbol.
*
* @return a value
*/
public float listIndent() {
return symbolIndent;
}
/**
* Get the string representation of what is in this line.
*
* @return a <CODE>String</CODE>
*/
@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 <CODE>true</CODE> if a newline caused the line split
*/
public boolean isNewlineSplit() {
return newlineSplit && alignment != Element.ALIGN_JUSTIFIED_ALL;
}
/**
* Gets the index of the last <CODE>PdfChunk</CODE> with metric attributes
* @return the last <CODE>PdfChunk</CODE> 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 <CODE>PdfChunk</CODE> by index.
* @param idx the index
* @return the <CODE>PdfChunk</CODE> 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).
* @return an extra leading for images
* @since 2.1.5
*/
float[] getMaxSize() {
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()) {
normal_leading = Math.max(chunk.font().size(), normal_leading);
}
else {
Image img = chunk.getImage();
float height = img.getScaledHeight() + chunk.getImageOffsetY() + img.getSpacingBefore();
image_leading = Math.max(height, image_leading);
}
}
return new float[]{normal_leading, 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()) {
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.getImage().getScaledHeight() + ck.getImageOffsetY());
else {
PdfFont font = ck.font();
ascender = Math.max(ascender, 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();
descender = Math.min(descender, font.getFont().getFontDescriptor(BaseFont.DESCENT, font.size()));
}
}
return descender;
}
}