/**
* Returns the start of the word at the given offset.
*
* @param textArea The text area.
* @param offs The offset into the text area's content.
* @return The start offset of the word.
* @throws BadLocationException If <code>offs</code> is invalid.
* @see #getWordEnd(RSyntaxTextArea, int)
*/
public static int getWordStart(RSyntaxTextArea textArea, int offs) throws BadLocationException {
Document doc = textArea.getDocument();
Element line = getLineElem(doc, offs);
if (line == null) {
throw new BadLocationException("No word at " + offs, offs);
}
int lineStart = line.getStartOffset();
if (offs == lineStart) { // Start of the line.
return offs;
}
int endOffs = Math.min(offs + 1, doc.getLength());
String s = doc.getText(lineStart, endOffs - lineStart);
if (s != null && s.length() > 0) {
int i = s.length() - 1;
char ch = s.charAt(i);
if (Character.isWhitespace(ch)) {
while (i > 0 && Character.isWhitespace(s.charAt(i - 1))) {
i--;
}
offs = lineStart + i;
} else if (Character.isLetterOrDigit(ch)) {
while (i > 0 && Character.isLetterOrDigit(s.charAt(i - 1))) {
i--;
}
offs = lineStart + i;
}
}
return offs;
}
/**
* Returns the end of the word at the given offset.
*
* @param textArea The text area.
* @param offs The offset into the text area's content.
* @return The end offset of the word.
* @throws BadLocationException If <code>offs</code> is invalid.
* @see #getWordStart(RSyntaxTextArea, int)
*/
public static int getWordEnd(RSyntaxTextArea textArea, int offs) throws BadLocationException {
Document doc = textArea.getDocument();
int endOffs = textArea.getLineEndOffsetOfCurrentLine();
int lineEnd = Math.min(endOffs, doc.getLength());
if (offs == lineEnd) { // End of the line.
return offs;
}
String s = doc.getText(offs, lineEnd - offs - 1);
if (s != null && s.length() > 0) { // Should always be true
int i = 0;
int count = s.length();
char ch = s.charAt(i);
if (Character.isWhitespace(ch)) {
while (i < count && Character.isWhitespace(s.charAt(i++))) ;
} else if (Character.isLetterOrDigit(ch)) {
while (i < count && Character.isLetterOrDigit(s.charAt(i++))) ;
} else {
i = 2;
}
offs += i - 1;
}
return offs;
}
/**
* Returns the bounding box (in the current view) of a specified position in the model. This
* method is designed for line-wrapped views to use, as it allows you to specify a "starting
* position" in the line, from which the x-value is assumed to be zero. The idea is that you
* specify the first character in a physical line as <code>p0</code>, as this is the character
* where the x-pixel value is 0.
*
* @param textArea The text area containing the text.
* @param s A segment in which to load the line. This is passed in so we don't have to reallocate
* a new <code>Segment</code> for each call.
* @param p0 The starting position in the physical line in the document.
* @param p1 The position for which to get the bounding box in the view.
* @param e How to expand tabs.
* @param rect The rectangle whose x- and width-values are changed to represent the bounding box
* of <code>p1</code>. This is reused to keep from needlessly reallocating Rectangles.
* @param x0 The x-coordinate (pixel) marking the left-hand border of the text. This is useful if
* the text area has a border, for example.
* @return The bounding box in the view of the character <code>p1</code>.
* @throws BadLocationException If <code>p0</code> or <code>p1</code> is not a valid location in
* the specified text area's document.
* @throws IllegalArgumentException If <code>p0</code> and <code>p1</code> are not on the same
* line.
*/
public static Rectangle getLineWidthUpTo(
RSyntaxTextArea textArea, Segment s, int p0, int p1, TabExpander e, Rectangle rect, int x0)
throws BadLocationException {
RSyntaxDocument doc = (RSyntaxDocument) textArea.getDocument();
// Ensure p0 and p1 are valid document positions.
if (p0 < 0) throw new BadLocationException("Invalid document position", p0);
else if (p1 > doc.getLength()) throw new BadLocationException("Invalid document position", p1);
// Ensure p0 and p1 are in the same line, and get the start/end
// offsets for that line.
Element map = doc.getDefaultRootElement();
int lineNum = map.getElementIndex(p0);
// We do ">1" because p1 might be the first position on the next line
// or the last position on the previous one.
// if (lineNum!=map.getElementIndex(p1))
if (Math.abs(lineNum - map.getElementIndex(p1)) > 1)
throw new IllegalArgumentException(
"p0 and p1 are not on the " + "same line (" + p0 + ", " + p1 + ").");
// Get the token list.
Token t = doc.getTokenListForLine(lineNum);
// Modify the token list 't' to begin at p0 (but still have correct
// token types, etc.), and get the x-location (in pixels) of the
// beginning of this new token list.
makeTokenListStartAt(t, p0, e, textArea, 0);
rect = t.listOffsetToView(textArea, e, p1, x0, rect);
return rect;
}
/**
* Returns the template that should be inserted at the current caret position, assuming the
* trigger character was pressed.
*
* @param textArea The text area that's getting text inserted into it.
* @return A template that should be inserted, if appropriate, or <code>null</code> if no template
* should be inserted.
*/
public CodeTemplate getTemplate(RSyntaxTextArea textArea) {
int caretPos = textArea.getCaretPosition();
int charsToGet = Math.min(caretPos, maxTemplateIDLength);
try {
Document doc = textArea.getDocument();
doc.getText(caretPos - charsToGet, charsToGet, s);
int index = Collections.binarySearch(templates, s, comparator);
return index >= 0 ? (CodeTemplate) templates.get(index) : null;
} catch (BadLocationException ble) {
ble.printStackTrace();
throw new InternalError("Error in CodeTemplateManager");
}
}
@Override
public void actionPerformedImpl(ActionEvent e, RTextArea textArea) {
if (!textArea.isEditable() || !textArea.isEnabled()) {
UIManager.getLookAndFeel().provideErrorFeedback(textArea);
return;
}
RSyntaxTextArea rsta = (RSyntaxTextArea) getTextComponent(e);
RSyntaxDocument doc = (RSyntaxDocument) rsta.getDocument();
int line = textArea.getCaretLineNumber();
int type = doc.getLastTokenTypeOnLine(line);
if (type < 0) {
type = doc.getClosestStandardTokenTypeForInternalType(type);
}
// Only in MLC's should we try this
if (type == Token.COMMENT_DOCUMENTATION || type == Token.COMMENT_MULTILINE) {
insertBreakInMLC(e, rsta, line);
} else {
handleInsertBreak(rsta, true);
}
}
public static int getMatchingBracketPosition(RSyntaxTextArea textArea) {
try {
// Actually position just BEFORE caret.
int caretPosition = textArea.getCaretPosition() - 1;
if (caretPosition > -1) {
// Some variables that will be used later.
Token token;
Element map;
int curLine;
Element line;
int start, end;
RSyntaxDocument doc = (RSyntaxDocument) textArea.getDocument();
char bracket = doc.charAt(caretPosition);
// First, see if the previous char was a bracket
// ('{', '}', '(', ')', '[', ']').
// If it was, then make sure this bracket isn't sitting in
// the middle of a comment or string. If it isn't, then
// initialize some stuff so we can continue on.
char bracketMatch;
boolean goForward;
switch (bracket) {
case '{':
case '(':
case '[':
// Ensure this bracket isn't in a comment.
map = doc.getDefaultRootElement();
curLine = map.getElementIndex(caretPosition);
line = map.getElement(curLine);
start = line.getStartOffset();
end = line.getEndOffset();
token = doc.getTokenListForLine(curLine);
token = RSyntaxUtilities.getTokenAtOffset(token, caretPosition);
// All brackets are always returned as "separators."
if (token.type != Token.SEPARATOR) {
return -1;
}
bracketMatch = bracket == '{' ? '}' : (bracket == '(' ? ')' : ']');
goForward = true;
break;
case '}':
case ')':
case ']':
// Ensure this bracket isn't in a comment.
map = doc.getDefaultRootElement();
curLine = map.getElementIndex(caretPosition);
line = map.getElement(curLine);
start = line.getStartOffset();
end = line.getEndOffset();
token = doc.getTokenListForLine(curLine);
token = RSyntaxUtilities.getTokenAtOffset(token, caretPosition);
// All brackets are always returned as "separators."
if (token.type != Token.SEPARATOR) {
return -1;
}
bracketMatch = bracket == '}' ? '{' : (bracket == ')' ? '(' : '[');
goForward = false;
break;
default:
return -1;
}
if (goForward) {
int lastLine = map.getElementCount();
// Start just after the found bracket since we're sure
// we're not in a comment.
start = caretPosition + 1;
int numEmbedded = 0;
boolean haveTokenList = false;
while (true) {
doc.getText(start, end - start, charSegment);
int segOffset = charSegment.offset;
for (int i = segOffset; i < segOffset + charSegment.count; i++) {
char ch = charSegment.array[i];
if (ch == bracket) {
if (haveTokenList == false) {
token = doc.getTokenListForLine(curLine);
haveTokenList = true;
}
int offset = start + (i - segOffset);
token = RSyntaxUtilities.getTokenAtOffset(token, offset);
if (token.type == Token.SEPARATOR) numEmbedded++;
} else if (ch == bracketMatch) {
if (haveTokenList == false) {
token = doc.getTokenListForLine(curLine);
haveTokenList = true;
}
int offset = start + (i - segOffset);
token = RSyntaxUtilities.getTokenAtOffset(token, offset);
if (token.type == Token.SEPARATOR) {
if (numEmbedded == 0) return offset;
numEmbedded--;
}
}
} // End of for (int i=segOffset; i<segOffset+charSegment.count; i++).
// Bail out if we've gone through all lines and
// haven't found the match.
if (++curLine == lastLine) return -1;
// Otherwise, go through the next line.
haveTokenList = false;
line = map.getElement(curLine);
start = line.getStartOffset();
end = line.getEndOffset();
} // End of while (true).
} // End of if (goForward).
// Otherwise, we're going backward through the file
// (since we found '}', ')' or ']').
else { // goForward==false
// End just before the found bracket since we're sure
// we're not in a comment.
end = caretPosition; // - 1;
int numEmbedded = 0;
boolean haveTokenList = false;
Token t2;
while (true) {
doc.getText(start, end - start, charSegment);
int segOffset = charSegment.offset;
int iStart = segOffset + charSegment.count - 1;
for (int i = iStart; i >= segOffset; i--) {
char ch = charSegment.array[i];
if (ch == bracket) {
if (haveTokenList == false) {
token = doc.getTokenListForLine(curLine);
haveTokenList = true;
}
int offset = start + (i - segOffset);
t2 = RSyntaxUtilities.getTokenAtOffset(token, offset);
if (t2.type == Token.SEPARATOR) numEmbedded++;
} else if (ch == bracketMatch) {
if (haveTokenList == false) {
token = doc.getTokenListForLine(curLine);
haveTokenList = true;
}
int offset = start + (i - segOffset);
t2 = RSyntaxUtilities.getTokenAtOffset(token, offset);
if (t2.type == Token.SEPARATOR) {
if (numEmbedded == 0) return offset;
numEmbedded--;
}
}
} // End of for (int i=segOffset; i<segOffset+charSegment.count; i++).
// Bail out if we've gone through all lines and
// haven't found the match.
if (--curLine == -1) return -1;
// Otherwise, get ready for going through the
// next line.
haveTokenList = false;
line = map.getElement(curLine);
start = line.getStartOffset();
end = line.getEndOffset();
} // End of while (true).
} // End of else.
} // End of if (caretPosition>-1).
} catch (BadLocationException ble) {
// Shouldn't ever happen.
ble.printStackTrace();
}
// Something went wrong...
return -1;
}
