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/*
* ===========================================
* 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; ii < count; ii++) {
if (ii > 0 && (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; ii < count; ii++) {
if ((ii > 0) && ((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;
}
}
