/**
* Convert mouse screen coordinates to a <code>StyledText</code> offset.
*
* @param x screen X-coordinate
* @param y screen Y-coordinate
* @param absolute if <code>true</code>, coordinates are expected to be absolute screen
* coordinates
* @return text offset
* @see StyledText#getOffsetAtLocation()
*/
private int getOffsetAtLocation(int x, int y, boolean absolute) {
StyledText textWidget = fViewer.getTextWidget();
StyledTextContent content = textWidget.getContent();
Point location;
if (absolute) {
location = textWidget.toControl(x, y);
} else {
location = new Point(x, y);
}
int line = (textWidget.getTopPixel() + location.y) / textWidget.getLineHeight();
if (line >= content.getLineCount()) {
return content.getCharCount();
}
int lineOffset = content.getOffsetAtLine(line);
String lineText = content.getLine(line);
Point endOfLine = textWidget.getLocationAtOffset(lineOffset + lineText.length());
if (location.x >= endOfLine.x) {
return lineOffset + lineText.length();
}
try {
return textWidget.getOffsetAtLocation(location);
} catch (IllegalArgumentException iae) {
// we are expecting this
return -1;
}
}
/**
* Writes data in BrailleZephyr file format to <code>Writer</code>.
*
* @param writer the writer stream to write the data.
* @exception IOException
* @see #readBZY(Reader)
*/
public void writeBZY(Writer writer) throws IOException {
// write configuration lines
writer.write("Version " + versionMajor + ' ' + versionMinor + ' ' + versionPatch + eol);
writer.write("CharsPerLine " + charsPerLine + eol);
writer.write("LinesPerPage " + linesPerPage + eol);
writer.write("CaretOffset " + currentText.getCaretOffset() + eol);
writer.write("ViewFocus ");
if (currentText == brailleText) writer.write("braille" + eol);
else writer.write("ascii" + eol);
if (content.getCharCount() > 0)
writer.write(
"ReturnAtEnd " + (content.getLine(content.getLineCount() - 1).length() == 0) + eol);
else writer.write("ReturnAtEnd false" + eol);
writer.write("HeaderEnd" + eol);
// write first line
String line = content.getLine(0);
if (line.length() > 0 && line.charAt(line.length() - 1) == PARAGRAPH_END)
writer.write(line.substring(0, line.length() - 1) + (char) 0xb6);
else writer.write(line);
// write text
for (int i = 1; i < content.getLineCount(); i++) {
writer.write(eol);
line = content.getLine(i);
if (line.length() > 0 && line.charAt(line.length() - 1) == PARAGRAPH_END)
writer.write(line.substring(0, line.length() - 1) + (char) 0xb6);
else writer.write(line);
}
writer.flush();
resetChanges();
}
/**
* Reads data in BrailleZephyr file format from <code>Reader</code>.
*
* @param reader the reader stream from which to read the data.
* @exception IOException
* @see #writeBZY(Writer)
*/
public void readBZY(Reader reader) throws IOException, BZException {
String line;
boolean returnAtEnd = false;
int caretOffset = 0;
int unknown = 0;
content.setText("");
eol = System.getProperty("line.separator");
BufferedReader buffer = new BufferedReader(reader);
// read configuration lines
header:
while ((line = buffer.readLine()) != null) {
String tokens[] = line.split(" ");
switch (tokens[0]) {
// don't do anything for now
case "Version":
break;
case "CharsPerLine":
charsPerLine = Integer.parseInt(tokens[1]);
break;
case "LinesPerPage":
linesPerPage = Integer.parseInt(tokens[1]);
break;
case "CaretOffset":
caretOffset = Integer.parseInt(tokens[1]);
break;
case "ViewFocus":
if (tokens[1].equals("braille")) {
if (brailleText.isVisible()) brailleText.setFocus();
} else if (tokens[1].equals("ascii")) {
if (asciiText.isVisible()) asciiText.setFocus();
} else logWriter.println("ERROR: Invalid ViewFocus value: " + line);
break;
case "ReturnAtEnd":
returnAtEnd = Boolean.parseBoolean(tokens[1]);
break;
case "HeaderEnd":
break header;
default:
logWriter.println("WARNING: Unknown file format parameter: " + line);
unknown++;
if (unknown > 6) throw new BZException("Invalid file format");
break;
}
}
if (line == null) throw new BZException("Invalid file format");
// read first line, may be null for empty document
if ((line = buffer.readLine()) != null) {
if (line.length() > 0 && line.charAt(line.length() - 1) == 0xb6)
content.replaceTextRange(0, 0, line.substring(0, line.length() - 1) + PARAGRAPH_END);
else content.replaceTextRange(0, 0, line);
// read next lines
while ((line = buffer.readLine()) != null) {
content.replaceTextRange(content.getCharCount(), 0, eol);
if (line.length() > 0 && line.charAt(line.length() - 1) == 0xb6)
content.replaceTextRange(
content.getCharCount(), 0, line.substring(0, line.length() - 1) + PARAGRAPH_END);
else content.replaceTextRange(content.getCharCount(), 0, line);
}
}
if (returnAtEnd) content.replaceTextRange(content.getCharCount(), 0, eol);
clearChanges();
brailleText.setCaretOffset(caretOffset);
asciiText.setCaretOffset(caretOffset);
}
