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/*
* Braille Utils (C) 2010-2011 Daisy Consortium
*
* 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
*/
package com_braillo;
import java.io.IOException;
import java.util.ArrayList;
import java.util.List;
import org.daisy.braille.embosser.EmbosserTools;
import org.daisy.paper.Dimensions;
class Braillo440VolumeWriter extends BrailloVolumeWriter {
public enum Mode {SW_TWO_PAGE, SW_FOUR_PAGE, SWSF};
private final int width;
@SuppressWarnings("unused")
private final int height;
private final Dimensions pageFormat;
private final Mode mode;
private final double columnWidthMM;
Braillo440VolumeWriter(Dimensions pageFormat, Mode mode, int width, int height, double columnWidthMM) {
/*
int margin = 4; // approximate width of unprintable margins.
if (Paper.newPaper(PaperSize.A4).equals(paper)) {
// Underestimate margin width for A4 in order to get 32 chars width (pages will be 21,74 cm wide)
margin = 3;
}
this.width = paper.getWidth(cellWidth)-margin;*/
// Paper.INCH_IN_MM = the smallest possible margins (0.5 inch + 0.5 inch)
this.width = width;
this.height = height;
this.pageFormat = pageFormat;
this.mode = mode;
this.columnWidthMM = columnWidthMM;
int inchHeight = (int)Math.ceil(pageFormat.getHeight()/EmbosserTools.INCH_IN_MM);
if (width > 44 || inchHeight > 13) {
throw new IllegalArgumentException("Paper too wide or high: " + width + " chars x " + inchHeight + " inches.");
}
if (width < 10) {
throw new IllegalArgumentException("Paper too narrow: " + width + " chars.");
}
}
@SuppressWarnings("unchecked")
private List<Byte>[] newList(int s) {
return new List[s];
}
public List<? extends List<Byte>> reorder(List<? extends List<Byte>> pages) {
switch (mode) {
case SW_FOUR_PAGE: case SWSF: {
int s = (int)(Math.ceil(pages.size()/4d)*4);
List<Byte>[] r = newList(s);
for (int i=1;i<=s;i++) {
int pos;
if (mode==Mode.SW_FOUR_PAGE) {
pos = getPos(i, s);
} else if (mode==Mode.SWSF) {
pos = getPosReversed(i, s);
} else {
throw new RuntimeException("Unexpected error.");
}
if (i>pages.size()) {
r[pos] = new ArrayList<Byte>();
for (byte b:ffSeq) {
r[pos].add(b);
}
} else {
r[pos] = pages.get(i-1);
}
}
ArrayList<List<Byte>> ret = new ArrayList<List<Byte>>();
for (List<Byte> r2 : r) {
ret.add(r2);
}
return ret;
}
case SW_TWO_PAGE: {
int s = (int)(Math.ceil(pages.size()/2d)*2);
List<Byte>[] r = newList(s);
for (int i=0;i<s;i++) {
if (i>=pages.size()) {
r[i] = new ArrayList<Byte>();
for (byte b:ffSeq) {
r[i].add(b);
}
} else {
r[i] = pages.get(i);
}
}
ArrayList<List<Byte>> ret = new ArrayList<List<Byte>>();
for (List<Byte> r2 : r) {
ret.add(r2);
}
return ret;
}
default:
throw new RuntimeException("Unexpected error.");
}
}
private int getPos(int pos, int len) {
if (len % 4 != 0) {
throw new IllegalArgumentException("len % 4 must be 0");
}
if (pos>len) {
throw new IllegalArgumentException("len must be larger than pos");
}
if (pos<=len/2) {
int s = (int)Math.ceil(pos / 2d);
return (s - 1) * 4 + (pos - 1) % 2;
} else {
int s = (int)Math.ceil((len - pos + 1) / 2d);
return (s - 1) * 4 + (pos - 1) % 2 + 2;
}
}
private int getPosReversed(int pos, int len) {
return len-(getPos(pos, len)+1);
}
//jvm1.6@Override
public byte[] getFooter(int len) {
return new byte[0];
}
//jvm1.6@Override
public byte[] getHeader(int len) throws IOException {
// Round to the closest possible higher value, so that all characters fit on the page
byte[] w = EmbosserTools.toBytes(width, 2);
byte[] p;
int pi = 0;
byte m;
double m1 = Math.round(((pageFormat.getWidth() - columnWidthMM) / (2 * EmbosserTools.INCH_IN_MM)) * 10) / 10d;
double m2 = Math.round(((pageFormat.getWidth() - m1 * EmbosserTools.INCH_IN_MM - columnWidthMM) / EmbosserTools.INCH_IN_MM) * 10) / 10d;
byte[] mb1 = EmbosserTools.toBytes((int)(m1 * 10), 2);
byte[] mb2 = EmbosserTools.toBytes((int)(m2 * 10), 2);
switch (mode) {
case SW_FOUR_PAGE: case SWSF: {
pi = (int)Math.ceil(len/4d);
p = EmbosserTools.toBytes(pi, 2);
m = '1';
break;
}
case SW_TWO_PAGE: {
pi = (int)Math.ceil(len/2d);
p = EmbosserTools.toBytes(pi, 2);
m = '0';
break;
}
default:
throw new RuntimeException("Unexpected error.");
}
if (pi>99) {
throw new IOException("Too many sheets in one volume: " + pi);
}
return new byte[] {
0x1b, 'A', m, // page mode
0x1b, 'B', w[0], w[1], // width, in characters
0x1b, 'D', mb1[0], mb1[1], // margin 1
0x1b, 'E', mb2[0], mb2[1], // margin 2
0x1b, 'H', '1', // interpoint
0x1b, 'P', p[0], p[1] // number of sheets
};
}
}
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