com.lowagie.text.pdf.PdfChunk Maven / Gradle / Ivy
/*
* $Id: PdfChunk.java,v 1.70 2004/12/20 11:39:08 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.awt.Color;
import com.lowagie.text.Chunk;
import com.lowagie.text.Font;
import com.lowagie.text.Image;
import com.lowagie.text.SplitCharacter;
import java.util.HashMap;
import java.util.Iterator;
/**
* A PdfChunk is the PDF translation of a Chunk.
*
* A PdfChunk is a PdfString in a certain
* PdfFont and Color.
*
* @see PdfString
* @see PdfFont
* @see com.lowagie.text.Chunk
* @see com.lowagie.text.Font
*/
public class PdfChunk implements SplitCharacter{
private static final char singleSpace[] = {' '};
private static final PdfChunk thisChunk[] = new PdfChunk[1];
private static final float ITALIC_ANGLE = 0.21256f;
/** The allowed attributes in variable attributes. */
private static final HashMap keysAttributes = new HashMap();
/** The allowed attributes in variable noStroke. */
private static final HashMap keysNoStroke = new HashMap();
static {
keysAttributes.put(Chunk.ACTION, null);
keysAttributes.put(Chunk.UNDERLINE, null);
keysAttributes.put(Chunk.REMOTEGOTO, null);
keysAttributes.put(Chunk.LOCALGOTO, null);
keysAttributes.put(Chunk.LOCALDESTINATION, null);
keysAttributes.put(Chunk.GENERICTAG, null);
keysAttributes.put(Chunk.NEWPAGE, null);
keysAttributes.put(Chunk.IMAGE, null);
keysAttributes.put(Chunk.BACKGROUND, null);
keysAttributes.put(Chunk.PDFANNOTATION, null);
keysAttributes.put(Chunk.SKEW, null);
keysAttributes.put(Chunk.HSCALE, null);
keysNoStroke.put(Chunk.SUBSUPSCRIPT, null);
keysNoStroke.put(Chunk.SPLITCHARACTER, null);
keysNoStroke.put(Chunk.HYPHENATION, null);
keysNoStroke.put(Chunk.TEXTRENDERMODE, null);
}
// membervariables
/** The value of this object. */
protected String value = PdfObject.NOTHING;
/** The encoding. */
protected String encoding = BaseFont.WINANSI;
/** The font for this PdfChunk. */
protected PdfFont font;
protected BaseFont baseFont;
protected SplitCharacter splitCharacter;
/**
* Metric attributes.
*
* This attributes require the mesurement of characters widths when rendering
* such as underline.
*/
protected HashMap attributes = new HashMap();
/**
* Non metric attributes.
*
* This attributes do not require the mesurement of characters widths when rendering
* such as Color.
*/
protected HashMap noStroke = new HashMap();
/** true if the chunk split was cause by a newline. */
protected boolean newlineSplit;
/** The image in this PdfChunk, if it has one */
protected Image image;
/** The offset in the x direction for the image */
protected float offsetX;
/** The offset in the y direction for the image */
protected float offsetY;
/** Indicates if the height and offset of the Image has to be taken into account */
protected boolean changeLeading = false;
// constructors
/**
* Constructs a PdfChunk-object.
*
* @param string the content of the PdfChunk-object
* @param other Chunk with the same style you want for the new Chunk
*/
PdfChunk(String string, PdfChunk other) {
thisChunk[0] = this;
value = string;
this.font = other.font;
this.attributes = other.attributes;
this.noStroke = other.noStroke;
this.baseFont = other.baseFont;
Object obj[] = (Object[])attributes.get(Chunk.IMAGE);
if (obj == null)
image = null;
else {
image = (Image)obj[0];
offsetX = ((Float)obj[1]).floatValue();
offsetY = ((Float)obj[2]).floatValue();
changeLeading = ((Boolean)obj[3]).booleanValue();
}
encoding = font.getFont().getEncoding();
splitCharacter = (SplitCharacter)noStroke.get(Chunk.SPLITCHARACTER);
if (splitCharacter == null)
splitCharacter = this;
}
/**
* Constructs a PdfChunk-object.
*
* @param chunk the original Chunk-object
* @param action the PdfAction if the Chunk comes from an Anchor
*/
PdfChunk(Chunk chunk, PdfAction action) {
thisChunk[0] = this;
value = chunk.content();
Font f = chunk.font();
float size = f.size();
if (size == Font.UNDEFINED)
size = 12;
baseFont = f.getBaseFont();
int style = f.style();
if (style == Font.UNDEFINED) {
style = Font.NORMAL;
}
if (baseFont == null) {
// translation of the font-family to a PDF font-family
baseFont = f.getCalculatedBaseFont(false);
}
else {
// bold simulation
if ((style & Font.BOLD) != 0)
attributes.put(Chunk.TEXTRENDERMODE, new Object[]{new Integer(PdfContentByte.TEXT_RENDER_MODE_FILL_STROKE), new Float(size / 30f), null});
// italic simulation
if ((style & Font.ITALIC) != 0)
attributes.put(Chunk.SKEW, new float[]{0, ITALIC_ANGLE});
}
font = new PdfFont(baseFont, size);
// other style possibilities
HashMap attr = chunk.getAttributes();
if (attr != null) {
for (Iterator i = attr.keySet().iterator(); i.hasNext();) {
Object name = i.next();
if (keysAttributes.containsKey(name)) {
attributes.put(name, attr.get(name));
}
else if (keysNoStroke.containsKey(name)) {
noStroke.put(name, attr.get(name));
}
}
if ("".equals(attr.get(Chunk.GENERICTAG))) {
attributes.put(Chunk.GENERICTAG, chunk.content());
}
}
if (f.isUnderlined()) {
Object obj[] = {null, new float[]{0, 1f / 15, 0, -1f / 3, 0}};
Object unders[][] = Chunk.addToArray((Object[][])attributes.get(Chunk.UNDERLINE), obj);
attributes.put(Chunk.UNDERLINE, unders);
}
if (f.isStrikethru()) {
Object obj[] = {null, new float[]{0, 1f / 15, 0, 1f / 3, 0}};
Object unders[][] = Chunk.addToArray((Object[][])attributes.get(Chunk.UNDERLINE), obj);
attributes.put(Chunk.UNDERLINE, unders);
}
if (action != null)
attributes.put(Chunk.ACTION, action);
// the color can't be stored in a PdfFont
noStroke.put(Chunk.COLOR, f.color());
noStroke.put(Chunk.ENCODING, font.getFont().getEncoding());
Object obj[] = (Object[])attributes.get(Chunk.IMAGE);
if (obj == null) {
image = null;
}
else {
attributes.remove(Chunk.HSCALE); // images are scaled in other ways
image = (Image)obj[0];
offsetX = ((Float)obj[1]).floatValue();
offsetY = ((Float)obj[2]).floatValue();
changeLeading = ((Boolean)obj[3]).booleanValue();
}
font.setImage(image);
Float hs = (Float)attributes.get(Chunk.HSCALE);
if (hs != null)
font.setHorizontalScaling(hs.floatValue());
encoding = font.getFont().getEncoding();
splitCharacter = (SplitCharacter)noStroke.get(Chunk.SPLITCHARACTER);
if (splitCharacter == null)
splitCharacter = this;
}
// methods
/** Gets the Unicode equivalent to a CID.
* The (inexistent) CID is translated as '\n'.
* It has only meaning with CJK fonts with Identity encoding.
* @param c the CID code
* @return the Unicode equivalent
*/
public char getUnicodeEquivalent(char c) {
return baseFont.getUnicodeEquivalent(c);
}
protected int getWord(String text, int start) {
int len = text.length();
while (start < len) {
if (!Character.isLetter(text.charAt(start)))
break;
++start;
}
return start;
}
/**
* Splits this PdfChunk if it's too long for the given width.
*
* Returns null if the PdfChunk wasn't truncated.
*
* @param width a given width
* @return the PdfChunk that doesn't fit into the width.
*/
PdfChunk split(float width) {
newlineSplit = false;
if (image != null) {
if (image.scaledWidth() > width) {
PdfChunk pc = new PdfChunk(Chunk.OBJECT_REPLACEMENT_CHARACTER, this);
value = "";
attributes = new HashMap();
image = null;
font = PdfFont.getDefaultFont();
return pc;
}
else
return null;
}
HyphenationEvent hyphenationEvent = (HyphenationEvent)noStroke.get(Chunk.HYPHENATION);
int currentPosition = 0;
int splitPosition = -1;
float currentWidth = 0;
// loop over all the characters of a string
// or until the totalWidth is reached
int lastSpace = -1;
float lastSpaceWidth = 0;
int length = value.length();
char valueArray[] = value.toCharArray();
char character = 0;
BaseFont ft = font.getFont();
if (ft.getFontType() == BaseFont.FONT_TYPE_CJK && ft.getUnicodeEquivalent(' ') != ' ') {
while (currentPosition < length) {
// the width of every character is added to the currentWidth
char cidChar = valueArray[currentPosition];
character = ft.getUnicodeEquivalent(cidChar);
// if a newLine or carriageReturn is encountered
if (character == '\n') {
newlineSplit = true;
String returnValue = value.substring(currentPosition + 1);
value = value.substring(0, currentPosition);
if (value.length() < 1) {
value = "\u0001";
}
PdfChunk pc = new PdfChunk(returnValue, this);
return pc;
}
currentWidth += font.width(cidChar);
if (character == ' ') {
lastSpace = currentPosition + 1;
lastSpaceWidth = currentWidth;
}
if (currentWidth > width)
break;
// if a split-character is encountered, the splitPosition is altered
if (splitCharacter.isSplitCharacter(0, currentPosition, length, valueArray, thisChunk))
splitPosition = currentPosition + 1;
currentPosition++;
}
}
else {
while (currentPosition < length) {
// the width of every character is added to the currentWidth
character = valueArray[currentPosition];
// if a newLine or carriageReturn is encountered
if (character == '\r' || character == '\n') {
newlineSplit = true;
int inc = 1;
if (character == '\r' && currentPosition + 1 < length && valueArray[currentPosition + 1] == '\n')
inc = 2;
String returnValue = value.substring(currentPosition + inc);
value = value.substring(0, currentPosition);
if (value.length() < 1) {
value = " ";
}
PdfChunk pc = new PdfChunk(returnValue, this);
return pc;
}
currentWidth += font.width(character);
if (character == ' ') {
lastSpace = currentPosition + 1;
lastSpaceWidth = currentWidth;
}
if (currentWidth > width)
break;
// if a split-character is encountered, the splitPosition is altered
if (splitCharacter.isSplitCharacter(0, currentPosition, length, valueArray, null))
splitPosition = currentPosition + 1;
currentPosition++;
}
}
// if all the characters fit in the total width, null is returned (there is no overflow)
if (currentPosition == length) {
return null;
}
// otherwise, the string has to be truncated
if (splitPosition < 0) {
String returnValue = value;
value = "";
PdfChunk pc = new PdfChunk(returnValue, this);
return pc;
}
if (lastSpace > splitPosition && splitCharacter.isSplitCharacter(0, 0, 1, singleSpace, null))
splitPosition = lastSpace;
if (hyphenationEvent != null && lastSpace < currentPosition) {
int wordIdx = getWord(value, lastSpace);
if (wordIdx > lastSpace) {
String pre = hyphenationEvent.getHyphenatedWordPre(value.substring(lastSpace, wordIdx), font.getFont(), font.size(), width - lastSpaceWidth);
String post = hyphenationEvent.getHyphenatedWordPost();
if (pre.length() > 0) {
String returnValue = post + value.substring(wordIdx);
value = trim(value.substring(0, lastSpace) + pre);
PdfChunk pc = new PdfChunk(returnValue, this);
return pc;
}
}
}
String returnValue = value.substring(splitPosition);
value = trim(value.substring(0, splitPosition));
PdfChunk pc = new PdfChunk(returnValue, this);
return pc;
}
/**
* Truncates this PdfChunk if it's too long for the given width.
*
* Returns null if the PdfChunk wasn't truncated.
*
* @param width a given width
* @return the PdfChunk that doesn't fit into the width.
*/
PdfChunk truncate(float width) {
if (image != null) {
if (image.scaledWidth() > width) {
PdfChunk pc = new PdfChunk("", this);
value = "";
attributes.remove(Chunk.IMAGE);
image = null;
font = PdfFont.getDefaultFont();
return pc;
}
else
return null;
}
int currentPosition = 0;
float currentWidth = 0;
// it's no use trying to split if there isn't even enough place for a space
if (width < font.width()) {
String returnValue = value.substring(1);
value = value.substring(0, 1);
PdfChunk pc = new PdfChunk(returnValue, this);
return pc;
}
// loop over all the characters of a string
// or until the totalWidth is reached
int length = value.length();
char character;
while (currentPosition < length) {
// the width of every character is added to the currentWidth
character = value.charAt(currentPosition);
currentWidth += font.width(character);
if (currentWidth > width)
break;
currentPosition++;
}
// if all the characters fit in the total width, null is returned (there is no overflow)
if (currentPosition == length) {
return null;
}
// otherwise, the string has to be truncated
//currentPosition -= 2;
// we have to chop off minimum 1 character from the chunk
if (currentPosition == 0) {
currentPosition = 1;
}
String returnValue = value.substring(currentPosition);
value = value.substring(0, currentPosition);
PdfChunk pc = new PdfChunk(returnValue, this);
return pc;
}
// methods to retrieve the membervariables
/**
* Returns the font of this Chunk.
*
* @return a PdfFont
*/
PdfFont font() {
return font;
}
/**
* Returns the color of this Chunk.
*
* @return a Color
*/
Color color() {
return (Color)noStroke.get(Chunk.COLOR);
}
/**
* Returns the width of this PdfChunk.
*
* @return a width
*/
float width() {
return font.width(value);
}
/**
* Checks if the PdfChunk split was caused by a newline.
* @return true if the PdfChunk split was caused by a newline.
*/
public boolean isNewlineSplit()
{
return newlineSplit;
}
/**
* Gets the width of the PdfChunk taking into account the
* extra character and word spacing.
* @param charSpacing the extra character spacing
* @param wordSpacing the extra word spacing
* @return the calculated width
*/
public float getWidthCorrected(float charSpacing, float wordSpacing)
{
if (image != null) {
return image.scaledWidth() + charSpacing;
}
int numberOfSpaces = 0;
int idx = -1;
while ((idx = value.indexOf(' ', idx + 1)) >= 0)
++numberOfSpaces;
return width() + (value.length() * charSpacing + numberOfSpaces * wordSpacing);
}
/**
* Gets the text displacement relatiev to the baseline.
* @return a displacement in points
*/
public float getTextRise() {
Float f = (Float) getAttribute(Chunk.SUBSUPSCRIPT);
if (f != null) {
return f.floatValue();
}
return 0.0f;
}
/**
* Trims the last space.
* @return the width of the space trimmed, otherwise 0
*/
public float trimLastSpace()
{
BaseFont ft = font.getFont();
if (ft.getFontType() == BaseFont.FONT_TYPE_CJK && ft.getUnicodeEquivalent(' ') != ' ') {
if (value.length() > 1 && value.endsWith("\u0001")) {
value = value.substring(0, value.length() - 1);
return font.width('\u0001');
}
}
else {
if (value.length() > 1 && value.endsWith(" ")) {
value = value.substring(0, value.length() - 1);
return font.width(' ');
}
}
return 0;
}
/**
* Gets an attribute. The search is made in attributes
* and noStroke.
* @param name the attribute key
* @return the attribute value or null if not found
*/
Object getAttribute(String name)
{
if (attributes.containsKey(name))
return attributes.get(name);
return noStroke.get(name);
}
/**
*Checks if the attribute exists.
* @param name the attribute key
* @return true if the attribute exists
*/
boolean isAttribute(String name)
{
if (attributes.containsKey(name))
return true;
return noStroke.containsKey(name);
}
/**
* Checks if this PdfChunk needs some special metrics handling.
* @return true if this PdfChunk needs some special metrics handling.
*/
boolean isStroked()
{
return (attributes.size() > 0);
}
/**
* Checks if there is an image in the PdfChunk.
* @return true if an image is present
*/
boolean isImage()
{
return image != null;
}
/**
* Gets the image in the PdfChunk.
* @return the image or null
*/
Image getImage()
{
return image;
}
/**
* Sets the image offset in the x direction
* @param offsetX the image offset in the x direction
*/
void setImageOffsetX(float offsetX)
{
this.offsetX = offsetX;
}
/**
* Gets the image offset in the x direction
* @return the image offset in the x direction
*/
float getImageOffsetX()
{
return offsetX;
}
/**
* Sets the image offset in the y direction
* @param offsetY the image offset in the y direction
*/
void setImageOffsetY(float offsetY)
{
this.offsetY = offsetY;
}
/**
* Gets the image offset in the y direction
* @return Gets the image offset in the y direction
*/
float getImageOffsetY()
{
return offsetY;
}
/**
* sets the value.
* @param value content of the Chunk
*/
void setValue(String value)
{
this.value = value;
}
/**
* @see java.lang.Object#toString()
*/
public String toString() {
return value;
}
/**
* Tells you if this string is in Chinese, Japanese, Korean or Identity-H.
* @return true if the Chunk has a special encoding
*/
boolean isSpecialEncoding() {
return encoding.equals(CJKFont.CJK_ENCODING) || encoding.equals(BaseFont.IDENTITY_H);
}
/**
* Gets the encoding of this string.
*
* @return a String
*/
String getEncoding() {
return encoding;
}
int length() {
return value.length();
}
/**
* Checks if a character can be used to split a PdfString.
*
* for the moment every character less than or equal to SPACE and the character '-' are 'splitCharacters'.
*
* @param start start position in the array
* @param current current position in the array
* @param end end position in the array
* @param cc the character array that has to be checked
* @param ck chunk array
* @return true if the character can be used to split a string, false otherwise
*/
public boolean isSplitCharacter(int start, int current, int end, char[] cc, PdfChunk[] ck) {
char c;
if (ck == null)
c = cc[current];
else
c = ck[Math.min(current, ck.length - 1)].getUnicodeEquivalent(cc[current]);
if (c <= ' ' || c == '-') {
return true;
}
if (c < 0x2e80)
return false;
return ((c >= 0x2e80 && c < 0xd7a0)
|| (c >= 0xf900 && c < 0xfb00)
|| (c >= 0xfe30 && c < 0xfe50)
|| (c >= 0xff61 && c < 0xffa0));
}
boolean isExtSplitCharacter(int start, int current, int end, char[] cc, PdfChunk[] ck) {
return splitCharacter.isSplitCharacter(start, current, end, cc, ck);
}
/**
* Removes all the ' ' and '-'-characters on the right of a String.
*
* @param string the String that has to be trimmed.
* @return the trimmed String
*/
String trim(String string) {
BaseFont ft = font.getFont();
if (ft.getFontType() == BaseFont.FONT_TYPE_CJK && ft.getUnicodeEquivalent(' ') != ' ') {
while (string.endsWith("\u0001")) {
string = string.substring(0, string.length() - 1);
}
}
else {
while (string.endsWith(" ") || string.endsWith("\t")) {
string = string.substring(0, string.length() - 1);
}
}
return string;
}
public boolean changeLeading() {
return changeLeading;
}
float getCharWidth(char c) {
if (noPrint(c))
return 0;
return font.width(c);
}
public static boolean noPrint(char c) {
return ((c >= 0x200b && c <= 0x200f) || (c >= 0x202a && c <= 0x202e));
}
}