com.lowagie.text.pdf.PdfLine Maven / Gradle / Ivy
/*
* $Id: PdfLine.java,v 1.58 2004/12/27 07:09:31 blowagie Exp $
* $Name: $
*
* Copyright 1999, 2000, 2001, 2002 Bruno Lowagie
*
* The contents of this file are subject to the Mozilla Public License Version 1.1
* (the "License"); you may not use this file except in compliance with the License.
* You may obtain a copy of the License at http://www.mozilla.org/MPL/
*
* Software distributed under the License is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
* for the specific language governing rights and limitations under the License.
*
* The Original Code is 'iText, a free JAVA-PDF library'.
*
* The Initial Developer of the Original Code is Bruno Lowagie. Portions created by
* the Initial Developer are Copyright (C) 1999, 2000, 2001, 2002 by Bruno Lowagie.
* All Rights Reserved.
* Co-Developer of the code is Paulo Soares. Portions created by the Co-Developer
* are Copyright (C) 2000, 2001, 2002 by Paulo Soares. All Rights Reserved.
*
* Contributor(s): all the names of the contributors are added in the source code
* where applicable.
*
* Alternatively, the contents of this file may be used under the terms of the
* LGPL license (the "GNU LIBRARY GENERAL PUBLIC LICENSE"), in which case the
* provisions of LGPL are applicable instead of those above. If you wish to
* allow use of your version of this file only under the terms of the LGPL
* License and not to allow others to use your version of this file under
* the MPL, indicate your decision by deleting the provisions above and
* replace them with the notice and other provisions required by the LGPL.
* If you do not delete the provisions above, a recipient may use your version
* of this file under either the MPL or the GNU LIBRARY GENERAL PUBLIC LICENSE.
*
* This library is free software; you can redistribute it and/or modify it
* under the terms of the MPL as stated above or under the terms of the GNU
* Library General Public License as published by the Free Software Foundation;
* either version 2 of the License, or any later version.
*
* This library 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 Library general Public License for more
* details.
*
* If you didn't download this code from the following link, you should check if
* you aren't using an obsolete version:
* http://www.lowagie.com/iText/
*/
package com.lowagie.text.pdf;
import java.util.ArrayList;
import java.util.Iterator;
import com.lowagie.text.Element;
import com.lowagie.text.ListItem;
/**
* 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 heigth of the line. */
protected float height;
/** The listsymbol (if necessary). */
protected PdfChunk 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;
// 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();
}
PdfLine(float left, float remainingWidth, int alignment, boolean newlineSplit, ArrayList line, boolean isRTL) {
this.left = left;
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
* @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.isNewlineSplit() && alignment == Element.ALIGN_JUSTIFIED)
// alignment = Element.ALIGN_LEFT;
// if the length of the chunk > 0 we add it to the line
if (chunk.length() > 0) {
if (overflow != null)
chunk.trimLastSpace();
width -= chunk.width();
line.add(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) {
line.add(chunk);
return overflow;
}
// if the chunck couldn't even be truncated, we add everything, so be it
else {
if (overflow != null)
line.add(overflow);
return null;
}
}
else {
width += ((PdfChunk)(line.get(line.size() - 1))).trimLastSpace();
}
return overflow;
}
// 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_LEFT:
return left + width;
case Element.ALIGN_CENTER:
return left + (width / 2f);
default:
return left;
}
}
else {
switch (alignment) {
case Element.ALIGN_RIGHT:
return left + width;
case Element.ALIGN_CENTER:
return left + (width / 2f);
default:
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 || 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;
}
}
/**
* 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.
*
* This is only necessary for the first line of a ListItem.
*
* @param listItem the list symbol
*/
public void setListItem(ListItem listItem) {
this.listSymbol = new PdfChunk(listItem.listSymbol(), null);
this.symbolIndent = listItem.indentationLeft();
}
/**
* Returns the listsymbol of this line.
*
* @return a PdfChunk if the line has a listsymbol; null otherwise
*/
public PdfChunk 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 String
*/
public String toString() {
StringBuffer tmp = new StringBuffer();
for (Iterator i = line.iterator(); i.hasNext(); ) {
tmp.append(((PdfChunk) i.next()).toString());
}
return tmp.toString();
}
/**
* 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 = (PdfChunk)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 (PdfChunk)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 (if there are images in the line and if
* the leading has to be changed).
* @return maximum size of all the fonts used in this line
*/
float getMaxSize() {
float maxSize = 0;
for (int k = 0; k < line.size(); ++k) {
PdfChunk chunk = (PdfChunk)line.get(k);
if (!chunk.isImage() || !chunk.changeLeading()) {
maxSize = Math.max(chunk.font().size(), maxSize);
}
else {
maxSize = Math.max(chunk.getImage().scaledHeight() + chunk.getImageOffsetY() , maxSize);
}
}
return maxSize;
}
/**
* 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;
for (int k = 0; k < line.size(); ++k) {
PdfChunk chunk = (PdfChunk)line.get(k);
if (!chunk.isImage()) {
maxSize = Math.max(chunk.font().size(), maxSize);
}
else {
maxSize = Math.max(chunk.getImage().scaledHeight() + chunk.getImageOffsetY() , maxSize);
}
}
return maxSize;
}
boolean isRTL() {
return isRTL;
}
public float getWidthCorrected(float charSpacing, float wordSpacing) {
float total = 0;
for (int k = 0; k < line.size(); ++k) {
PdfChunk ck = (PdfChunk)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 = (PdfChunk)line.get(k);
if (ck.isImage())
ascender = Math.max(ascender, ck.getImage().scaledHeight() + 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 ascenders used in this line
*/
public float getDescender() {
float descender = 0;
for (int k = 0; k < line.size(); ++k) {
PdfChunk ck = (PdfChunk)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;
}
}