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An Open Source JavaFX PDF Viewer
/*
* ===========================================
* Java Pdf Extraction Decoding Access Library
* ===========================================
*
* Project Info: http://www.idrsolutions.com
* Help section for developers at http://www.idrsolutions.com/support/
*
* (C) Copyright 1997-2017 IDRsolutions and Contributors.
*
* This file is part of JPedal/JPDF2HTML5
*
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) 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
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with this library; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
* ---------------
* TextState.java
* ---------------
*/
package org.jpedal.objects;
import org.jpedal.utils.StringUtils;
/**
* holds the current text state
*/
public class TextState
{
float kerningAdded;
/**orientation of text using contstants from PdfData*/
public int writingMode;
/**last Tm value*/
private final float[][] TmAtStart = new float[3][3];
/**matrix operations for calculating start of text*/
public float[][] Tm = new float[3][3];
private String font_ID="";
/**leading setin text*/
private float TL;
/**gap between chars set by Tc command*/
private float character_spacing;
/**current Tfs value*/
private float Tfs = 1;
/** text rise set in stream*/
private float text_rise;
/**text height - see also Tfs*/
private float th = 1;
/**gap inserted with spaces - set by Tw*/
private float word_spacing;
private boolean hasFontChanged;
/**
* set Trm values
*/
public TextState()
{
Tm[0][0] = 1;
Tm[0][1] = 0;
Tm[0][2] = 0;
Tm[1][0] = 0;
Tm[1][1] = 1;
Tm[1][2] = 0;
Tm[2][0] = 0;
Tm[2][1] = 0;
Tm[2][2] = 1;
TmAtStart[0][0] = 1;
TmAtStart[0][1] = 0;
TmAtStart[0][2] = 0;
TmAtStart[1][0] = 0;
TmAtStart[1][1] = 1;
TmAtStart[1][2] = 0;
TmAtStart[2][0] = 0;
TmAtStart[2][1] = 0;
TmAtStart[2][2] = 1;
}
/**
* get Tm at start of line
*/
public float[][] getTMAtLineStart() {
return TmAtStart;
}
/**
* set Tm at start of line
*/
public void setTMAtLineStart() {
//keep position in case we need
TmAtStart[0][0] = Tm[0][0];
TmAtStart[0][1] = Tm[0][1];
TmAtStart[0][2] = Tm[0][2];
TmAtStart[1][0] = Tm[1][0];
TmAtStart[1][1] = Tm[1][1];
TmAtStart[1][2] = Tm[1][2];
TmAtStart[2][0] = Tm[2][0];
TmAtStart[2][1] = Tm[2][1];
TmAtStart[2][2] = Tm[2][2];
}
//////////////////////////////////////////////////////////////////////////
/**
* set Horizontal Scaling
*/
public final void setHorizontalScaling( final float th )
{
this.th = th;
}
///////////////////////////////////////////////////////////////////////
/**
* get font id
*/
public final String getFontID()
{
return font_ID;
}
///////////////////////////////////////////////////////////////////////////
/**
* get Text rise
*/
public final float getTextRise()
{
return text_rise;
}
////////////////////////////////////////////////////////////////////////
/**
* get character spacing
*/
public final float getCharacterSpacing()
{
return character_spacing;
}
/////////////////////////////////////////////////////////////////////////
/**
* get word spacing
*/
public final float getWordSpacing()
{
return word_spacing;
}
///////////////////////////////////////////////////////////////////////////
/**
* set font tfs
*/
public final void setLeading( final float TL )
{
this.TL = TL;
}
/////////////////////////////////////////////////////////////////////////
/**
* get font tfs
*/
public final float getTfs()
{
return Tfs;
}
/////////////////////////////////////////////////////////////////////////
/**
* get Horizontal Scaling
*/
public final float getHorizontalScaling()
{
return th;
}
/**
* set Text rise
*/
public final void setTextRise( final float text_rise )
{
this.text_rise = text_rise;
}
/**
* get font tfs
*/
public final float getLeading()
{
return TL;
}
/////////////////////////////////////////////////////////////////////////
/**
* clone object
*/
/*final public Object clone()
{
Object o = null;
try
{
o = super.clone();
}
catch( Exception e )
{
LogWriter.writeLog( "Unable to clone " + e );
}
return o;
}*/
/////////////////////////////////////////////////////////////////////////
public final TextState deepCopy(){
final TextState ts = new TextState();
ts.writingMode = writingMode;
if(TmAtStart != null){
for(int i=0;i<3;i++){
System.arraycopy(TmAtStart[i], 0, ts.TmAtStart[i], 0, 3);
}
}
if(Tm != null){
for(int i=0;i<3;i++){
System.arraycopy(Tm[i], 0, ts.Tm[i], 0, 3);
}
}
if(font_ID!=null) {
ts.font_ID = new String(StringUtils.toBytes(font_ID));
}
ts.TL = TL;
ts.character_spacing = character_spacing;
ts.Tfs = Tfs;
ts.text_rise = text_rise;
ts.th = th;
ts.word_spacing = word_spacing;
ts.hasFontChanged = hasFontChanged;
return ts;
}
/**
* set word spacing
*/
public final void setWordSpacing( final float word_spacing )
{
this.word_spacing = word_spacing;
}
/**
* set character spacing
*/
public final void setCharacterSpacing( final float character_spacing )
{
this.character_spacing = character_spacing;
}
//////////////////////////////////////////////////////////////////////////
/**
* set font tfs to default
*/
public final void resetTm()
{
Tm[0][0] = 1;
Tm[0][1] = 0;
Tm[0][2] = 0;
Tm[1][0] = 0;
Tm[1][1] = 1;
Tm[1][2] = 0;
Tm[2][0] = 0;
Tm[2][1] = 0;
Tm[2][2] = 1;
//keep position in case we need
setTMAtLineStart();
}
public boolean hasFontChanged() {
return hasFontChanged;
}
public void setFontChanged(final boolean status) {
hasFontChanged=status;
}
public void TF(final float Tfs, final String fontID) {
//set global variables to new values
this.Tfs = Tfs;
font_ID = fontID;
//flag font has changed
hasFontChanged = true;
}
public void setLastKerningAdded(final float spacingAdded) {
this.kerningAdded =spacingAdded;
}
public float getLastKerningAdded() {
return kerningAdded;
}
}