/**
* Provides a mapping from the document model coordinate space to the coordinate space of the
* view mapped to it.
*
* @param pos the position to convert
* @param a the allocated region to render into
* @return the bounding box of the given position is returned
* @exception BadLocationException if the given position does not represent a valid location in
* the associated document.
*/
public Shape modelToView(int pos, Shape a, Position.Bias b) throws BadLocationException {
// System.err.println("--- begin modelToView ---");
Rectangle alloc = a.getBounds();
RSyntaxTextArea textArea = (RSyntaxTextArea) getContainer();
alloc.height = textArea.getLineHeight(); // metrics.getHeight();
alloc.width = 1;
int p0 = getStartOffset();
int p1 = getEndOffset();
int testP = (b == Position.Bias.Forward) ? pos : Math.max(p0, pos - 1);
// Get the token list for this line so we don't have to keep
// recomputing it if this logical line spans multiple physical
// lines.
RSyntaxDocument doc = (RSyntaxDocument) getDocument();
Element map = doc.getDefaultRootElement();
int line = map.getElementIndex(p0);
Token tokenList = doc.getTokenListForLine(line);
float x0 = alloc.x; // 0;
while (p0 < p1) {
x0 =
RSyntaxUtilities.makeTokenListStartAt(
tokenList, p0, WrappedSyntaxView.this, textArea, x0);
int p = calculateBreakPosition(p0, tokenList, x0);
if ((pos >= p0) && (testP < p)) { // pos < p)) {
// it's in this line
alloc =
RSyntaxUtilities.getLineWidthUpTo(
textArea, s, p0, pos, WrappedSyntaxView.this, alloc, alloc.x);
// System.err.println("--- end modelToView ---");
return alloc;
}
// if (p == p1 && pos == p1) {
if (p == p1 - 1 && pos == p1 - 1) {
// Wants end.
if (pos > p0) {
alloc =
RSyntaxUtilities.getLineWidthUpTo(
textArea, s, p0, pos, WrappedSyntaxView.this, alloc, alloc.x);
}
// System.err.println("--- end modelToView ---");
return alloc;
}
p0 = (p == p0) ? p1 : p;
// System.err.println("... ... Incrementing y");
alloc.y += alloc.height;
}
throw new BadLocationException(null, pos);
}
/** Calculate the number of lines that will be rendered by logical line when it is wrapped. */
final int calculateLineCount() {
int nlines = 0;
int startOffset = getStartOffset();
int p1 = getEndOffset();
// Get the token list for this line so we don't have to keep
// recomputing it if this logical line spans multiple physical
// lines.
RSyntaxTextArea textArea = (RSyntaxTextArea) getContainer();
RSyntaxDocument doc = (RSyntaxDocument) getDocument();
Element map = doc.getDefaultRootElement();
int line = map.getElementIndex(startOffset);
Token tokenList = doc.getTokenListForLine(line);
float x0 = 0; // FIXME: should be alloc.x!! alloc.x;//0;
// System.err.println(">>> calculateLineCount: " + startOffset + "-" + p1);
for (int p0 = startOffset; p0 < p1; ) {
// System.err.println("... ... " + p0 + ", " + p1);
nlines += 1;
x0 =
RSyntaxUtilities.makeTokenListStartAt(
tokenList, p0, WrappedSyntaxView.this, textArea, x0);
int p = calculateBreakPosition(p0, tokenList, x0);
// System.err.println("... ... ... break position p==" + p);
p0 = (p == p0) ? ++p : p; // this is the fix of #4410243
// we check on situation when
// width is too small and
// break position is calculated
// incorrectly.
// System.err.println("... ... ... new p0==" + p0);
}
/*
int numLines = 0;
try {
numLines = textArea.getLineCount();
} catch (BadLocationException ble) {
ble.printStackTrace();
}
System.err.println(">>> >>> calculated number of lines for this view (line " + line + "/" + numLines + ": " + nlines);
*/
return nlines;
}
/**
* Provides a mapping from the view coordinate space to the logical coordinate space of the
* model.
*
* @param fx the X coordinate
* @param fy the Y coordinate
* @param a the allocated region to render into
* @return the location within the model that best represents the given point in the view
* @see View#viewToModel
*/
public int viewToModel(float fx, float fy, Shape a, Position.Bias[] bias) {
// PENDING(prinz) implement bias properly
bias[0] = Position.Bias.Forward;
Rectangle alloc = (Rectangle) a;
RSyntaxDocument doc = (RSyntaxDocument) getDocument();
int x = (int) fx;
int y = (int) fy;
if (y < alloc.y) {
// above the area covered by this icon, so the the position
// is assumed to be the start of the coverage for this view.
return getStartOffset();
} else if (y > alloc.y + alloc.height) {
// below the area covered by this icon, so the the position
// is assumed to be the end of the coverage for this view.
return getEndOffset() - 1;
} else {
// positioned within the coverage of this view vertically,
// so we figure out which line the point corresponds to.
// if the line is greater than the number of lines
// contained, then simply use the last line as it represents
// the last possible place we can position to.
RSyntaxTextArea textArea = (RSyntaxTextArea) getContainer();
alloc.height = textArea.getLineHeight();
int p1 = getEndOffset();
// Get the token list for this line so we don't have to keep
// recomputing it if this logical line spans multiple
// physical lines.
Element map = doc.getDefaultRootElement();
int p0 = getStartOffset();
int line = map.getElementIndex(p0);
Token tlist = doc.getTokenListForLine(line);
// Look at each physical line-chunk of this logical line.
while (p0 < p1) {
// We can always use alloc.x since we always break
// lines so they start at the beginning of a physical
// line.
RSyntaxUtilities.makeTokenListStartAt(
tlist, p0, WrappedSyntaxView.this, textArea, alloc.x);
int p = calculateBreakPosition(p0, tlist, alloc.x);
// If desired view position is in this physical chunk.
if ((y >= alloc.y) && (y < (alloc.y + alloc.height))) {
// Point is to the left of the line
if (x < alloc.x) {
return p0;
}
// Point is to the right of the line
else if (x > alloc.x + alloc.width) {
return p - 1;
}
// Point is in this physical line!
else {
// Start at alloc.x since this chunk starts
// at the beginning of a physical line.
int n = tlist.getListOffset(textArea, WrappedSyntaxView.this, alloc.x, x);
// NOTE: We needed to add the max() with
// p0 as getTokenListForLine returns -1
// for empty lines (just a null token).
// How did this work before?
// FIXME: Have null tokens have their
// offset but a -1 length.
return Math.max(Math.min(n, p1 - 1), p0);
} // End of else.
} // End of if ((y>=alloc.y) && ...
p0 = (p == p0) ? p1 : p;
alloc.y += alloc.height;
} // End of while (p0<p1).
return getEndOffset() - 1;
} // End of else.
}