/**
* Draw every char in separate terminal cell to guaranty equal width for different lines.
* Nevertheless to improve kerning we draw word characters as one block for monospaced fonts.
*/
private void drawChars(int x, int y, CharBuffer buf, TextStyle style, Graphics2D gfx) {
final int blockLen = 1;
int offset = 0;
int drawCharsOffset = 0;
// workaround to fix Swing bad rendering of bold special chars on Linux
// TODO required for italic?
CharBuffer renderingBuffer;
if (mySettingsProvider.DECCompatibilityMode() && style.hasOption(TextStyle.Option.BOLD)) {
renderingBuffer = CharUtils.heavyDecCompatibleBuffer(buf);
} else {
renderingBuffer = buf;
}
while (offset + blockLen <= buf.length()) {
if (renderingBuffer.getBuf()[buf.getStart() + offset] == CharUtils.DWC) {
offset += blockLen;
drawCharsOffset += blockLen;
continue; // dont' draw second part(fake one) of double width character
}
Font font = getFontToDisplay(buf.charAt(offset + blockLen - 1), style);
// while (myMonospaced && (offset + blockLen < buf.getLength()) &&
// isWordCharacter(buf.charAt(offset + blockLen - 1))
// && (font == getFontToDisplay(buf.charAt(offset + blockLen - 1), style))) {
// blockLen++;
// }
gfx.setFont(font);
int descent = gfx.getFontMetrics(font).getDescent();
int baseLine = (y + 1) * myCharSize.height - descent;
int xCoord = (x + drawCharsOffset) * myCharSize.width;
int textLength =
CharUtils.getTextLengthDoubleWidthAware(
buf.getBuf(),
buf.getStart() + offset,
blockLen,
mySettingsProvider.ambiguousCharsAreDoubleWidth());
int yCoord = y * myCharSize.height;
gfx.setClip(
xCoord,
yCoord,
Math.min(textLength * myCharSize.width, getWidth() - xCoord),
Math.min(myCharSize.height, getHeight() - yCoord));
gfx.setColor(getPalette().getColor(myStyleState.getForeground(style.getForegroundForRun())));
gfx.drawChars(renderingBuffer.getBuf(), buf.getStart() + offset, blockLen, xCoord, baseLine);
drawCharsOffset += blockLen;
offset += blockLen;
}
gfx.setClip(null);
}
/**
* Check if the first X characters of a byte stream match a String.
*
* @param data The byte array to process
* @param pattern The String to match
* @return True if the pattern was found, false otherwise
*/
private static boolean bytesEqualsString(byte[] data, String pattern) {
byte[] bytes = new byte[pattern.length()];
Charset csets = Charset.forName("US-ASCII");
boolean fin = false;
int currChar = 0;
// remove any CR and/or LF characters at the beginning of the article
// data
while (!fin) {
if (currChar >= data.length) break;
byte in = data[currChar];
ByteBuffer bb = ByteBuffer.wrap(new byte[] {(byte) in});
CharBuffer cb = csets.decode(bb);
char c = cb.charAt(0);
if (data.length > 0 && (c == '\n' || c == '\r')) currChar++;
else fin = true;
if (data.length == 0) fin = true;
}
// extract bytes (chars) to check from article data
for (int i = 0; i < bytes.length && i < data.length; i++, currChar++) {
byte in = data[currChar];
bytes[i] = (byte) in;
}
// decode byte data to characters
ByteBuffer bb = ByteBuffer.wrap(bytes);
CharBuffer cb = csets.decode(bb);
// compare these characters to the pattern String
for (int i = 0; i < pattern.length(); i++) if (cb.charAt(i) != pattern.charAt(i)) return false;
return true;
}
private void drawCharacters(int x, int y, TextStyle style, CharBuffer buf, Graphics2D gfx) {
int xCoord = x * myCharSize.width;
int yCoord = y * myCharSize.height;
if (xCoord < 0 || xCoord > getWidth() || yCoord < 0 || yCoord > getHeight()) {
return;
}
gfx.setColor(getPalette().getColor(myStyleState.getBackground(style.getBackgroundForRun())));
int textLength =
CharUtils.getTextLengthDoubleWidthAware(
buf.getBuf(),
buf.getStart(),
buf.length(),
mySettingsProvider.ambiguousCharsAreDoubleWidth());
gfx.fillRect(
xCoord,
yCoord,
Math.min(textLength * myCharSize.width, getWidth() - xCoord),
Math.min(myCharSize.height, getHeight() - yCoord));
if (buf.isNul()) {
return; // nothing more to do
}
drawChars(x, y, buf, style, gfx);
gfx.setColor(getPalette().getColor(myStyleState.getForeground(style.getForegroundForRun())));
int baseLine = (y + 1) * myCharSize.height - myDescent;
if (style.hasOption(TextStyle.Option.UNDERLINED)) {
gfx.drawLine(xCoord, baseLine + 1, (x + textLength) * myCharSize.width, baseLine + 1);
}
}