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/*
* MicroEmulator
* Copyright (C) 2001 Bartek Teodorczyk
*
* 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 javax.microedition.lcdui;
import org.microemu.device.DeviceFactory;
class StringComponent {
private String text;
private int breaks[] = new int[4];
private boolean invertPaint = false;
private int numOfBreaks;
private int width;
private int widthDecreaser;
public StringComponent() {
this(null);
}
public StringComponent(String text) {
synchronized (this) {
this.width = -1;
this.widthDecreaser = 0;
setText(text);
}
}
public int getCharHeight() {
return Font.getDefaultFont().getHeight();
}
public int getCharPositionX(int num) {
synchronized (this) {
if (numOfBreaks == -1) {
updateBreaks();
}
int i, prevIndex = 0;
Font f = Font.getDefaultFont();
for (i = 0; i < numOfBreaks; i++) {
if (num < breaks[i]) {
break;
}
prevIndex = breaks[i];
}
return f.substringWidth(text, prevIndex, num - prevIndex);
}
}
public int getCharPositionY(int num) {
int y = 0;
synchronized (this) {
if (numOfBreaks == -1) {
updateBreaks();
}
Font f = Font.getDefaultFont();
for (int i = 0; i < numOfBreaks; i++) {
if (num < breaks[i]) {
break;
}
y += f.getHeight();
}
}
return y;
}
public int getHeight() {
int height;
synchronized (this) {
if (numOfBreaks == -1) {
updateBreaks();
}
Font f = Font.getDefaultFont();
if (text == null) {
return 0;
}
if (numOfBreaks == 0) {
return f.getHeight();
}
height = numOfBreaks * f.getHeight();
if (breaks[numOfBreaks - 1] == text.length() - 1
&& text.charAt(text.length() - 1) == '\n') {
} else {
height += f.getHeight();
}
}
return height;
}
public String getText() {
return text;
}
public void invertPaint(boolean state) {
synchronized (this) {
invertPaint = state;
}
}
public int paint(Graphics g) {
if (text == null) {
return 0;
}
int y;
synchronized (this) {
if (numOfBreaks == -1) {
updateBreaks();
}
int i, prevIndex;
Font f = Font.getDefaultFont();
for (i = prevIndex = y = 0; i < numOfBreaks; i++) {
if (invertPaint) {
g.setGrayScale(0);
} else {
g.setGrayScale(255);
}
g.fillRect(0, y, width, f.getHeight());
if (invertPaint) {
g.setGrayScale(255);
} else {
g.setGrayScale(0);
}
g.drawSubstring(text, prevIndex, breaks[i] - prevIndex, 0, y, 0);
prevIndex = breaks[i];
y += f.getHeight();
}
if (prevIndex != text.length()) {
if (invertPaint) {
g.setGrayScale(0);
} else {
g.setGrayScale(255);
}
g.fillRect(0, y, width, f.getHeight());
if (invertPaint) {
g.setGrayScale(255);
} else {
g.setGrayScale(0);
}
g.drawSubstring(text, prevIndex, text.length() - prevIndex, 0, y, 0);
y += f.getHeight();
}
}
return y;
}
public void setText(String text) {
synchronized (this) {
this.text = text;
this.numOfBreaks = -1;
}
}
public void setWidthDecreaser(int widthDecreaser) {
synchronized (this) {
this.widthDecreaser = widthDecreaser;
numOfBreaks = -1;
}
}
private void insertBreak(int pos) {
int i;
for (i = 0; i < numOfBreaks; i++) {
if (pos < breaks[i]) {
break;
}
}
if (numOfBreaks + 1 == breaks.length) {
int newbreaks[] = new int[breaks.length + 4];
System.arraycopy(breaks, 0, newbreaks, 0, numOfBreaks);
breaks = newbreaks;
}
System.arraycopy(breaks, i, breaks, i + 1, numOfBreaks - i);
breaks[i] = pos;
numOfBreaks++;
}
private void updateBreaks() {
if (text == null) {
return;
}
// TODO use Displayable width
width = DeviceFactory.getDevice().getDeviceDisplay().getWidth()
- widthDecreaser;
int prevIndex = 0;
int canBreak = 0;
numOfBreaks = 0;
Font f = Font.getDefaultFont();
for (int i = 0; i < text.length(); i++) {
if (text.charAt(i) == ' ') {
canBreak = i + 1;
}
if (text.charAt(i) == '\n') {
insertBreak(i);
canBreak = 0;
prevIndex = i + 1;
continue;
}
if (f.substringWidth(text, prevIndex, i - prevIndex + 1) > width) {
if (canBreak != 0) {
insertBreak(canBreak);
i = canBreak;
prevIndex = i;
} else {
insertBreak(i);
prevIndex = i + 1;
}
canBreak = 0;
}
}
}
}
