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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
*
* ---------------
* TD.java
* ---------------
*/
package org.jpedal.parser.text;
import org.jpedal.objects.TextState;
import org.jpedal.utils.Matrix;
public class TD {
/**used to speed-up conversion of hex strings to numbers*/
static final int[] multiply8={0,3,6,9,12,15};
static final int[] multiply16={0,4,8,12,16,20,24,28,32,36,40};
public static void execute(final boolean isLowerCase, final float x, final float y, final TextState currentTextState) {
relativeMove(x, y,currentTextState);
if (!isLowerCase) { //set leading as well
final float TL = -y;
currentTextState.setLeading(TL);
}
}
/**
* used by TD and T* to move current co-ord
*/
public static void relativeMove(final float new_x, final float new_y, final TextState currentTextState) {
//create matrix to update Tm
final float[][] temp = new float[3][3];
currentTextState.Tm = currentTextState.getTMAtLineStart();
//set Tm matrix
temp[0][0] = 1;
temp[0][1] = 0;
temp[0][2] = 0;
temp[1][0] = 0;
temp[1][1] = 1;
temp[1][2] = 0;
temp[2][0] = new_x;
temp[2][1] = new_y;
temp[2][2] = 1;
//multiply to get new Tm
currentTextState.Tm = Matrix.multiply(temp, currentTextState.Tm);
currentTextState.setTMAtLineStart();
}
/**
* get unicode/escape value and convert to value
*/
static int readEscapeValue(final int start, final int count, final int base, final byte[] characterStream) {
final int val;
switch(base) {
case 8:
val = getOctal(start, count, characterStream);
break;
case 16:
val = getHex(start, count, characterStream);
break;
default:
val = getGeneral(start, count, base, characterStream);
break;
}
return val;
}
private static int getGeneral(final int start, final int count, final int base, final byte[] characterStream) {
final StringBuilder chars = new StringBuilder(10);
for (int pointer = 0; pointer < count; pointer++) {
chars.append((char) characterStream[start + pointer]);
}
return Integer.parseInt(chars.toString(), base);
}
private static int getHex(final int start, final int count, final byte[] characterStream) {
int val=0;
//now convert to value
int topHex, ptr=0;
for (int aa = 1; aa < count + 1; aa++) {
topHex = characterStream[start + count - aa];
//convert to number
if (topHex >= 'A' && topHex <= 'F') {
topHex -= 55;
} else if (topHex >= 'a' && topHex <= 'f') {
topHex -= 87;
} else if (topHex >= '0' && topHex <= '9') {
topHex -= 48;
} else { //ignore 'bum' values
continue;
}
val += (topHex << multiply16[ptr]);
ptr++;
}
return val;
}
private static int getOctal(final int start, final int count, final byte[] characterStream) {
//now convert to value
int topHex, ptr=0, val=0;
for (int aa = 1; aa < count + 1; aa++) {
topHex = characterStream[start + count - aa];
//convert to number
if (topHex >= '0' && topHex <= '7') {
topHex -= 48;
} else { //ignore 'bum' values
continue;
}
val += (topHex << multiply8[ptr]);
ptr++;
}
return val;
}
/**
* convert to to String
*/
static String getString(final int start,int end, final byte[] dataStream) {
final String s;
//lose spaces or returns at end
while(dataStream[end]==32 || dataStream[end]==13 || dataStream[end]==10) {
end--;
}
final int count=end-start+1;
//discount duplicate spaces
int spaces=0;
for(int ii=0;ii0 &&(dataStream[start+ii]==32 || dataStream[start+ii]==13 ||dataStream[start+ii]==10)&&
(dataStream[start+ii-1]==32|| dataStream[start+ii-1]==13|| dataStream[start+ii-1]==10)) {
spaces++;
}
}
final char[] charString=new char[count-spaces];
int pos=0;
for(int ii=0;ii0)&&((dataStream[start+ii]==32)||(dataStream[start+ii]==13)||(dataStream[start+ii]==10))&&
((dataStream[start+ii-1]==32)||(dataStream[start+ii-1]==13)||(dataStream[start+ii-1]==10)))
{
}else{
if((dataStream[start+ii]==10)||(dataStream[start+ii]==13)) {
charString[pos] = ' ';
} else {
charString[pos] = (char) dataStream[start + ii];
}
pos++;
}
}
s=String.copyValueOf(charString);
return s;
}
}