@Override
public int viewToModel(float x, float y, Shape a, Position.Bias[] bias) {
int offs = -1;
if (!isAllocationValid()) {
Rectangle alloc = a.getBounds();
setSize(alloc.width, alloc.height);
}
// Get the child view for the line at (x,y), and ask it for the
// specific offset.
Rectangle alloc = getInsideAllocation(a);
View v = getViewAtPoint((int) x, (int) y, alloc);
if (v != null) {
offs = v.viewToModel(x, y, alloc, bias);
}
// Code folding may have hidden the last line. If so, return the last
// visible offset instead of the last offset.
if (host.isCodeFoldingEnabled()
&& v == getView(getViewCount() - 1)
&& offs == v.getEndOffset() - 1) {
offs = host.getLastVisibleOffset();
}
return offs;
}
/**
* Determines the preferred span for this view along an axis.
*
* @param axis may be either View.X_AXIS or View.Y_AXIS
* @return the span the view would like to be rendered into >= 0. Typically the view is told to
* render into the span that is returned, although there is no guarantee. The parent may
* choose to resize or break the view.
* @exception IllegalArgumentException for an invalid axis
*/
@Override
public float getPreferredSpan(int axis) {
updateMetrics();
switch (axis) {
case View.X_AXIS:
float span = longLineWidth + getRhsCorrection(); // fudge factor
if (host.getEOLMarkersVisible()) {
span += metrics.charWidth('\u00B6');
}
return span;
case View.Y_AXIS:
// We update lineHeight here as when this method is first
// called, lineHeight isn't initialized. If we don't do it
// here, we get no vertical scrollbar (as lineHeight==0).
lineHeight = host != null ? host.getLineHeight() : lineHeight;
// return getElement().getElementCount() * lineHeight;
int visibleLineCount = getElement().getElementCount();
if (host.isCodeFoldingEnabled()) {
visibleLineCount -= host.getFoldManager().getHiddenLineCount();
}
return visibleLineCount * (float) lineHeight;
default:
throw new IllegalArgumentException("Invalid axis: " + axis);
}
}
/**
* Provides a mapping from the view coordinate space to the logical coordinate space of the model.
*
* @param fx the X coordinate >= 0
* @param fy the Y coordinate >= 0
* @param a the allocated region to render into
* @return the location within the model that best represents the given point in the view >= 0
*/
@Override
public int viewToModel(float fx, float fy, Shape a, Position.Bias[] bias) {
bias[0] = Position.Bias.Forward;
Rectangle alloc = a.getBounds();
RSyntaxDocument doc = (RSyntaxDocument) getDocument();
int x = (int) fx;
int y = (int) fy;
// If they're asking about a view position above the area covered by
// this view, then the position is assumed to be the starting position
// of this view.
if (y < alloc.y) {
return getStartOffset();
}
// If they're asking about a position below this view, the position
// is assumed to be the ending position of this view.
else if (y > alloc.y + alloc.height) {
return host.getLastVisibleOffset();
}
// They're asking about a position 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.
else {
Element map = doc.getDefaultRootElement();
int lineIndex = Math.abs((y - alloc.y) / lineHeight); // metrics.getHeight() );
FoldManager fm = host.getFoldManager();
// System.out.print("--- " + lineIndex);
lineIndex += fm.getHiddenLineCountAbove(lineIndex, true);
// System.out.println(" => " + lineIndex);
if (lineIndex >= map.getElementCount()) {
return host.getLastVisibleOffset();
}
Element line = map.getElement(lineIndex);
// If the point is to the left of the line...
if (x < alloc.x) {
return line.getStartOffset();
} else if (x > alloc.x + alloc.width) {
return line.getEndOffset() - 1;
} else {
// Determine the offset into the text
int p0 = line.getStartOffset();
Token tokenList = doc.getTokenListForLine(lineIndex);
tabBase = alloc.x;
int offs = tokenList.getListOffset((RSyntaxTextArea) getContainer(), this, tabBase, x);
return offs != -1 ? offs : p0;
}
} // End of else.
}
/**
* 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.
*/
@Override
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) {
TokenSubList subList =
TokenUtils.getSubTokenList(
tokenList, p0, WrappedSyntaxView.this, textArea, x0, lineCountTempToken);
x0 = subList != null ? subList.x : x0;
tokenList = subList != null ? subList.tokenList : null;
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);
}
/**
* Workaround for JTextComponents allowing the caret to be rendered entirely off-screen if the
* entire "previous" character fit entirely.
*
* @return The amount of space to add to the x-axis preferred span.
*/
private int getRhsCorrection() {
int rhsCorrection = 10;
if (host != null) {
rhsCorrection = host.getRightHandSideCorrection();
}
return rhsCorrection;
}
/** Overridden to allow for folded regions. */
@Override
protected View getViewAtPoint(int x, int y, Rectangle alloc) {
int lineCount = getViewCount();
int curY = alloc.y + getOffset(Y_AXIS, 0); // Always at least 1 line
host = (RSyntaxTextArea) getContainer();
FoldManager fm = host.getFoldManager();
for (int line = 1; line < lineCount; line++) {
int span = getSpan(Y_AXIS, line - 1);
if (y < curY + span) {
childAllocation2(line - 1, curY, alloc);
return getView(line - 1);
}
curY += span;
Fold fold = fm.getFoldForLine(line - 1);
if (fold != null && fold.isCollapsed()) {
line += fold.getCollapsedLineCount();
}
}
// Not found - return last line's view.
childAllocation2(lineCount - 1, curY, alloc);
return getView(lineCount - 1);
}
/**
* Paints the word-wrapped text.
*
* @param g The graphics context in which to paint.
* @param a The shape (usually a rectangle) in which to paint.
*/
public void paint(Graphics g, Shape a) {
Rectangle alloc = (a instanceof Rectangle) ? (Rectangle) a : a.getBounds();
tabBase = alloc.x;
Graphics2D g2d = (Graphics2D) g;
host = (RSyntaxTextArea) getContainer();
int ascent = host.getMaxAscent();
int fontHeight = host.getLineHeight();
FoldManager fm = host.getFoldManager();
TokenPainter painter = host.getTokenPainter();
Element root = getElement();
// Whether token styles should always be painted, even in selections
int selStart = host.getSelectionStart();
int selEnd = host.getSelectionEnd();
boolean useSelectedTextColor = host.getUseSelectedTextColor();
int n = getViewCount(); // Number of lines.
int x = alloc.x + getLeftInset();
tempRect.y = alloc.y + getTopInset();
Rectangle clip = g.getClipBounds();
for (int i = 0; i < n; i++) {
tempRect.x = x + getOffset(X_AXIS, i);
// tempRect.y = y + getOffset(Y_AXIS, i);
tempRect.width = getSpan(X_AXIS, i);
tempRect.height = getSpan(Y_AXIS, i);
// System.err.println("For line " + i + ": tempRect==" + tempRect);
if (tempRect.intersects(clip)) {
Element lineElement = root.getElement(i);
int startOffset = lineElement.getStartOffset();
int endOffset = lineElement.getEndOffset() - 1; // Why always "-1"?
View view = getView(i);
if (!useSelectedTextColor
|| selStart == selEnd
|| (startOffset >= selEnd || endOffset < selStart)) {
drawView(painter, g2d, alloc, view, fontHeight, tempRect.y + ascent);
} else {
// System.out.println("Drawing line with selection: " + i);
drawViewWithSelection(
painter, g2d, alloc, view, fontHeight, tempRect.y + ascent, selStart, selEnd);
}
}
tempRect.y += tempRect.height;
Fold possibleFold = fm.getFoldForLine(i);
if (possibleFold != null && possibleFold.isCollapsed()) {
i += possibleFold.getCollapsedLineCount();
// Visible indicator of collapsed lines
Color c = RSyntaxUtilities.getFoldedLineBottomColor(host);
if (c != null) {
g.setColor(c);
g.drawLine(x, tempRect.y - 1, alloc.width, tempRect.y - 1);
}
}
}
}
/** {@inheritDoc} */
public int yForLine(Rectangle alloc, int line) throws BadLocationException {
// Rectangle lineArea = lineToRect(alloc, lineIndex);
updateMetrics();
if (metrics != null) {
// NOTE: lineHeight is not initially set here, leading to the
// current line not being highlighted when a document is first
// opened. So, we set it here just in case.
lineHeight = host != null ? host.getLineHeight() : lineHeight;
FoldManager fm = host.getFoldManager();
if (!fm.isLineHidden(line)) {
line -= fm.getHiddenLineCountAbove(line);
return alloc.y + line * lineHeight;
}
}
return -1;
}
/** {@inheritDoc} */
public int yForLineContaining(Rectangle alloc, int offs) throws BadLocationException {
if (isAllocationValid()) {
// TODO: make cached Y_AXIS offsets valid even with folding enabled
// to speed this back up!
Rectangle r = (Rectangle) modelToView(offs, alloc, Bias.Forward);
if (r != null) {
if (host.isCodeFoldingEnabled()) {
int line = host.getLineOfOffset(offs);
FoldManager fm = host.getFoldManager();
if (fm.isLineHidden(line)) {
return -1;
}
}
return r.y;
}
}
return -1;
}
/**
* Determine the rectangle that represents the given line.
*
* @param a The region allocated for the view to render into
* @param line The line number to find the region of. This must be a valid line number in the
* model.
*/
protected Rectangle lineToRect(Shape a, int line) {
Rectangle r = null;
updateMetrics();
if (metrics != null) {
Rectangle alloc = a.getBounds();
// NOTE: lineHeight is not initially set here, leading to the
// current line not being highlighted when a document is first
// opened. So, we set it here just in case.
lineHeight = host != null ? host.getLineHeight() : lineHeight;
if (host != null && host.isCodeFoldingEnabled()) {
FoldManager fm = host.getFoldManager();
int hiddenCount = fm.getHiddenLineCountAbove(line);
line -= hiddenCount;
}
r = new Rectangle(alloc.x, alloc.y + line * lineHeight, alloc.width, lineHeight);
}
return r;
}
/** Checks to see if the font metrics and longest line are up-to-date. */
private void updateMetrics() {
host = (RSyntaxTextArea) getContainer();
Font f = host.getFont();
if (font != f) {
// The font changed, we need to recalculate the longest line!
// This also updates cached font and tab size.
calculateLongestLine();
}
}
/**
* Sets the allocation rectangle for a given line's view, but sets the y value to the passed-in
* value. This should be used instead of {@link #childAllocation(int, Rectangle)} since it allows
* you to account for hidden lines in collapsed fold regions.
*
* @param line
* @param y
* @param alloc
*/
private void childAllocation2(int line, int y, Rectangle alloc) {
alloc.x += getOffset(X_AXIS, line);
alloc.y += y;
alloc.width = getSpan(X_AXIS, line);
alloc.height = getSpan(Y_AXIS, line);
// FIXME: This is required due to a bug that I can't track down. The
// top margin is being added twice somewhere in wrapped views, so we
// have to adjust for it here.
alloc.y -= host.getMargin().top;
}
private void handleDocumentEvent(DocumentEvent e, Shape a, ViewFactory f) {
int n = calculateLineCount();
if (this.nlines != n) {
this.nlines = n;
WrappedSyntaxView.this.preferenceChanged(this, false, true);
// have to repaint any views after the receiver.
RSyntaxTextArea textArea = (RSyntaxTextArea) getContainer();
textArea.repaint();
// Must also revalidate container so gutter components, such
// as line numbers, get updated for this line's new height
Gutter gutter = RSyntaxUtilities.getGutter(textArea);
if (gutter != null) {
gutter.revalidate();
gutter.repaint();
}
} else if (a != null) {
Component c = getContainer();
Rectangle alloc = (Rectangle) a;
c.repaint(alloc.x, alloc.y, alloc.width, alloc.height);
}
}
/**
* Returns a token list for the <i>physical</i> line below the physical line containing the
* specified offset into the document. Note that for this plain (non-wrapped) view, this is simply
* the token list for the logical line below the line containing <code>offset</code>, since lines
* are not wrapped.
*
* @param offset The offset in question.
* @return A token list for the physical (and in this view, logical) line after this one. If
* <code>offset</code> is in the last physical line in the document, <code>null</code> is
* returned.
*/
public Token getTokenListForPhysicalLineBelow(int offset) {
RSyntaxDocument document = (RSyntaxDocument) getDocument();
Element map = document.getDefaultRootElement();
int lineCount = map.getElementCount();
int line = map.getElementIndex(offset);
if (!host.isCodeFoldingEnabled()) {
if (line < lineCount - 1) {
return document.getTokenListForLine(line + 1);
}
} else {
FoldManager fm = host.getFoldManager();
line = fm.getVisibleLineBelow(line);
if (line >= 0 && line < lineCount) {
return document.getTokenListForLine(line);
}
}
// int line = map.getElementIndex(offset);
// int lineCount = map.getElementCount();
// if (line<lineCount-1)
// return document.getTokenListForLine(line+1);
return null;
}
/**
* Draws the passed-in text using syntax highlighting for the current language. It is assumed that
* the entire line is either not in a selected region, or painting with a selection-foreground
* color is turned off.
*
* @param painter The painter to render the tokens.
* @param token The list of tokens to draw.
* @param g The graphics context in which to draw.
* @param x The x-coordinate at which to draw.
* @param y The y-coordinate at which to draw.
* @return The x-coordinate representing the end of the painted text.
*/
private float drawLine(
TokenPainter painter, Token token, Graphics2D g, float x, float y, int line) {
float nextX = x; // The x-value at the end of our text.
boolean paintBG = host.getPaintTokenBackgrounds(line, y);
while (token != null && token.isPaintable() && nextX < clipEnd) {
nextX = painter.paint(token, g, nextX, y, host, this, clipStart, paintBG);
token = token.getNextToken();
}
// NOTE: We should re-use code from Token (paintBackground()) here,
// but don't because I'm just too lazy.
if (host.getEOLMarkersVisible()) {
g.setColor(host.getForegroundForTokenType(Token.WHITESPACE));
g.setFont(host.getFontForTokenType(Token.WHITESPACE));
g.drawString("\u00B6", nextX, y);
}
// Return the x-coordinate at the end of the painted text.
return nextX;
}
/**
* Paints the word-wrapped text.
*
* @param g The graphics context in which to paint.
* @param a The shape (usually a rectangle) in which to paint.
*/
public void paint(Graphics g, Shape a) {
Rectangle alloc = (a instanceof Rectangle) ? (Rectangle) a : a.getBounds();
tabBase = alloc.x;
Graphics2D g2d = (Graphics2D) g;
host = (RSyntaxTextArea) getContainer();
int ascent = host.getMaxAscent();
int fontHeight = host.getLineHeight();
FoldManager fm = host.getFoldManager();
int n = getViewCount(); // Number of lines.
int x = alloc.x + getLeftInset();
tempRect.y = alloc.y + getTopInset();
Rectangle clip = g.getClipBounds();
for (int i = 0; i < n; i++) {
tempRect.x = x + getOffset(X_AXIS, i);
// tempRect.y = y + getOffset(Y_AXIS, i);
tempRect.width = getSpan(X_AXIS, i);
tempRect.height = getSpan(Y_AXIS, i);
// System.err.println("For line " + i + ": tempRect==" + tempRect);
if (tempRect.intersects(clip)) {
View view = getView(i);
drawView(g2d, alloc, view, fontHeight, tempRect.y + ascent);
}
tempRect.y += tempRect.height;
Fold possibleFold = fm.getFoldForLine(i);
if (possibleFold != null && possibleFold.isCollapsed()) {
i += possibleFold.getCollapsedLineCount();
// Visible indicator of collapsed lines
Color c = RSyntaxUtilities.getFoldedLineBottomColor(host);
if (c != null) {
g.setColor(c);
g.drawLine(x, tempRect.y - 1, alloc.width, tempRect.y - 1);
}
}
}
}
/**
* Determines the preferred span for this view along an axis. This is implemented to provide the
* superclass behavior after first making sure that the current font metrics are cached (for the
* nested lines which use the metrics to determine the height of the potentially wrapped lines).
*
* @param axis may be either View.X_AXIS or View.Y_AXIS
* @return the span the view would like to be rendered into. Typically the view is told to render
* into the span that is returned, although there is no guarantee. The parent may choose to
* resize or break the view.
* @see View#getPreferredSpan
*/
public float getPreferredSpan(int axis) {
updateMetrics();
float span = 0;
if (axis == View.X_AXIS) { // Add EOL marker
span = super.getPreferredSpan(axis);
span += metrics.charWidth('\u00b6'); // metrics set in updateMetrics
} else {
span = super.getPreferredSpan(axis);
host = (RSyntaxTextArea) getContainer();
if (host.isCodeFoldingEnabled()) {
// TODO: Cache y-offsets again to speed this up
// System.out.println("y-axis baby");
int lineCount = host.getLineCount();
FoldManager fm = host.getFoldManager();
for (int i = 0; i < lineCount; i++) {
if (fm.isLineHidden(i)) {
span -= getSpan(View.Y_AXIS, i);
}
}
}
}
return span;
}
/**
* Fetches the allocation for the given child view to render into.
*
* <p>Overridden to account for lines hidden by collapsed folded regions.
*
* @param line The index of the child, >= 0 && < getViewCount()
* @param a The allocation to this view
* @return The allocation to the child
*/
public Shape getChildAllocationImpl(int line, Shape a) {
Rectangle alloc = getInsideAllocation(a);
host = (RSyntaxTextArea) getContainer();
FoldManager fm = host.getFoldManager();
int y = alloc.y;
// TODO: Make cached getOffset() calls for Y_AXIS valid even for
// folding, to speed this up!
for (int i = 0; i < line; i++) {
y += getSpan(Y_AXIS, i);
Fold fold = fm.getFoldForLine(i);
if (fold != null && fold.isCollapsed()) {
i += fold.getCollapsedLineCount();
}
}
childAllocation2(line, y, alloc);
return alloc;
}
/**
* Returns a token list for the <i>physical</i> line above the physical line containing the
* specified offset into the document. Note that for this plain (non-wrapped) view, this is simply
* the token list for the logical line above the line containing <code>offset</code>, since lines
* are not wrapped.
*
* @param offset The offset in question.
* @return A token list for the physical (and in this view, logical) line before this one. If
* <code>offset</code> is in the first line in the document, <code>null</code> is returned.
*/
public Token getTokenListForPhysicalLineAbove(int offset) {
RSyntaxDocument document = (RSyntaxDocument) getDocument();
Element map = document.getDefaultRootElement();
int line = map.getElementIndex(offset);
FoldManager fm = host.getFoldManager();
if (fm == null) {
line--;
if (line >= 0) {
return document.getTokenListForLine(line);
}
} else {
line = fm.getVisibleLineAbove(line);
if (line >= 0) {
return document.getTokenListForLine(line);
}
}
// int line = map.getElementIndex(offset) - 1;
// if (line>=0)
// return document.getTokenListForLine(line);
return null;
}
/**
* Draws a single view (i.e., a line of text for a wrapped view), wrapping the text onto multiple
* lines if necessary. Any selected text is rendered with the editor's "selected text" color.
*
* @param painter The painter to use to render tokens.
* @param g The graphics context in which to paint.
* @param r The rectangle in which to paint.
* @param view The <code>View</code> to paint.
* @param fontHeight The height of the font being used.
* @param y The y-coordinate at which to begin painting.
* @param selStart The start of the selection.
* @param selEnd The end of the selection.
*/
protected void drawViewWithSelection(
TokenPainter painter,
Graphics2D g,
Rectangle r,
View view,
int fontHeight,
int y,
int selStart,
int selEnd) {
float x = r.x;
LayeredHighlighter h = (LayeredHighlighter) host.getHighlighter();
RSyntaxDocument document = (RSyntaxDocument) getDocument();
Element map = getElement();
int p0 = view.getStartOffset();
int lineNumber = map.getElementIndex(p0);
int p1 = view.getEndOffset(); // - 1;
setSegment(p0, p1 - 1, document, drawSeg);
// System.err.println("drawSeg=='" + drawSeg + "' (p0/p1==" + p0 + "/" + p1 + ")");
int start = p0 - drawSeg.offset;
Token token = document.getTokenListForLine(lineNumber);
// If this line is an empty line, then the token list is simply a
// null token. In this case, the line highlight will be skipped in
// the loop below, so unfortunately we must manually do it here.
if (token != null && token.getType() == Token.NULL) {
h.paintLayeredHighlights(g, p0, p1, r, host, this);
return;
}
// Loop through all tokens in this view and paint them!
while (token != null && token.isPaintable()) {
int p = calculateBreakPosition(p0, token, x);
x = r.x;
h.paintLayeredHighlights(g, p0, p, r, host, this);
while (token != null && token.isPaintable() && token.getEndOffset() - 1 < p) { // <=p) {
// Selection starts in this token
if (token.containsPosition(selStart)) {
if (selStart > token.getOffset()) {
tempToken.copyFrom(token);
tempToken.textCount = selStart - tempToken.getOffset();
x = painter.paint(tempToken, g, x, y, host, this);
tempToken.textCount = token.length();
tempToken.makeStartAt(selStart);
// Clone required since token and tempToken must be
// different tokens for else statement below
token = new TokenImpl(tempToken);
}
int selCount = Math.min(token.length(), selEnd - token.getOffset());
if (selCount == token.length()) {
x = painter.paintSelected(token, g, x, y, host, this);
} else {
tempToken.copyFrom(token);
tempToken.textCount = selCount;
x = painter.paintSelected(tempToken, g, x, y, host, this);
tempToken.textCount = token.length();
tempToken.makeStartAt(token.getOffset() + selCount);
token = tempToken;
x = painter.paint(token, g, x, y, host, this);
}
}
// Selection ends in this token
else if (token.containsPosition(selEnd)) {
tempToken.copyFrom(token);
tempToken.textCount = selEnd - tempToken.getOffset();
x = painter.paintSelected(tempToken, g, x, y, host, this);
tempToken.textCount = token.length();
tempToken.makeStartAt(selEnd);
token = tempToken;
x = painter.paint(token, g, x, y, host, this);
}
// This token is entirely selected
else if (token.getOffset() >= selStart && token.getEndOffset() <= selEnd) {
x = painter.paintSelected(token, g, x, y, host, this);
}
// This token is entirely unselected
else {
x = painter.paint(token, g, x, y, host, this);
}
token = token.getNextToken();
}
// If there's a token that's going to be split onto the next line
if (token != null && token.isPaintable() && token.getOffset() < p) {
int tokenOffset = token.getOffset();
Token orig = token;
token =
new TokenImpl(
drawSeg, tokenOffset - start, p - 1 - start, tokenOffset, token.getType());
// Selection starts in this token
if (token.containsPosition(selStart)) {
if (selStart > token.getOffset()) {
tempToken.copyFrom(token);
tempToken.textCount = selStart - tempToken.getOffset();
x = painter.paint(tempToken, g, x, y, host, this);
tempToken.textCount = token.length();
tempToken.makeStartAt(selStart);
// Clone required since token and tempToken must be
// different tokens for else statement below
token = new TokenImpl(tempToken);
}
int selCount = Math.min(token.length(), selEnd - token.getOffset());
if (selCount == token.length()) {
x = painter.paintSelected(token, g, x, y, host, this);
} else {
tempToken.copyFrom(token);
tempToken.textCount = selCount;
x = painter.paintSelected(tempToken, g, x, y, host, this);
tempToken.textCount = token.length();
tempToken.makeStartAt(token.getOffset() + selCount);
token = tempToken;
x = painter.paint(token, g, x, y, host, this);
}
}
// Selection ends in this token
else if (token.containsPosition(selEnd)) {
tempToken.copyFrom(token);
tempToken.textCount = selEnd - tempToken.getOffset();
x = painter.paintSelected(tempToken, g, x, y, host, this);
tempToken.textCount = token.length();
tempToken.makeStartAt(selEnd);
token = tempToken;
x = painter.paint(token, g, x, y, host, this);
}
// This token is entirely selected
else if (token.getOffset() >= selStart && token.getEndOffset() <= selEnd) {
x = painter.paintSelected(token, g, x, y, host, this);
}
// This token is entirely unselected
else {
x = painter.paint(token, g, x, y, host, this);
}
token = new TokenImpl(orig);
((TokenImpl) token).makeStartAt(p);
}
p0 = (p == p0) ? p1 : p;
y += fontHeight;
} // End of while (token!=null && token.isPaintable()).
// NOTE: We should re-use code from Token (paintBackground()) here,
// but don't because I'm just too lazy.
if (host.getEOLMarkersVisible()) {
g.setColor(host.getForegroundForTokenType(Token.WHITESPACE));
g.setFont(host.getFontForTokenType(Token.WHITESPACE));
g.drawString("\u00B6", x, y - fontHeight);
}
}
/**
* Draws a single view (i.e., a line of text for a wrapped view), wrapping the text onto multiple
* lines if necessary.
*
* @param painter The painter to use to render tokens.
* @param g The graphics context in which to paint.
* @param r The rectangle in which to paint.
* @param view The <code>View</code> to paint.
* @param fontHeight The height of the font being used.
* @param y The y-coordinate at which to begin painting.
*/
protected void drawView(
TokenPainter painter, Graphics2D g, Rectangle r, View view, int fontHeight, int y) {
float x = r.x;
LayeredHighlighter h = (LayeredHighlighter) host.getHighlighter();
RSyntaxDocument document = (RSyntaxDocument) getDocument();
Element map = getElement();
int p0 = view.getStartOffset();
int lineNumber = map.getElementIndex(p0);
int p1 = view.getEndOffset(); // - 1;
setSegment(p0, p1 - 1, document, drawSeg);
// System.err.println("drawSeg=='" + drawSeg + "' (p0/p1==" + p0 + "/" + p1 + ")");
int start = p0 - drawSeg.offset;
Token token = document.getTokenListForLine(lineNumber);
// If this line is an empty line, then the token list is simply a
// null token. In this case, the line highlight will be skipped in
// the loop below, so unfortunately we must manually do it here.
if (token != null && token.getType() == Token.NULL) {
h.paintLayeredHighlights(g, p0, p1, r, host, this);
return;
}
// Loop through all tokens in this view and paint them!
while (token != null && token.isPaintable()) {
int p = calculateBreakPosition(p0, token, x);
x = r.x;
h.paintLayeredHighlights(g, p0, p, r, host, this);
while (token != null && token.isPaintable() && token.getEndOffset() - 1 < p) { // <=p) {
x = painter.paint(token, g, x, y, host, this);
token = token.getNextToken();
}
if (token != null && token.isPaintable() && token.getOffset() < p) {
int tokenOffset = token.getOffset();
tempToken.set(
drawSeg.array, tokenOffset - start, p - 1 - start, tokenOffset, token.getType());
painter.paint(tempToken, g, x, y, host, this);
tempToken.copyFrom(token);
tempToken.makeStartAt(p);
token = new TokenImpl(tempToken);
}
p0 = (p == p0) ? p1 : p;
y += fontHeight;
} // End of while (token!=null && token.isPaintable()).
// NOTE: We should re-use code from Token (paintBackground()) here,
// but don't because I'm just too lazy.
if (host.getEOLMarkersVisible()) {
g.setColor(host.getForegroundForTokenType(Token.WHITESPACE));
g.setFont(host.getFontForTokenType(Token.WHITESPACE));
g.drawString("\u00B6", x, y - fontHeight);
}
}
/**
* 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
*/
@Override
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.
TokenSubList subList =
TokenUtils.getSubTokenList(
tlist, p0, WrappedSyntaxView.this, textArea, alloc.x, lineCountTempToken);
tlist = subList != null ? subList.tokenList : null;
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.
}
/**
* Actually paints the text area. Only lines that have been damaged are repainted.
*
* @param g The graphics context with which to paint.
* @param a The allocated region in which to render.
*/
@Override
public void paint(Graphics g, Shape a) {
RSyntaxDocument document = (RSyntaxDocument) getDocument();
Rectangle alloc = a.getBounds();
tabBase = alloc.x;
host = (RSyntaxTextArea) getContainer();
Rectangle clip = g.getClipBounds();
// An attempt to speed things up for files with long lines. Note that
// this will actually slow things down a bit for the common case of
// regular-length lines, but it doesn't make a perceivable difference.
clipStart = clip.x;
clipEnd = clipStart + clip.width;
lineHeight = host.getLineHeight();
ascent = host.getMaxAscent(); // metrics.getAscent();
int heightAbove = clip.y - alloc.y;
int linesAbove = Math.max(0, heightAbove / lineHeight);
FoldManager fm = host.getFoldManager();
linesAbove += fm.getHiddenLineCountAbove(linesAbove, true);
Rectangle lineArea = lineToRect(a, linesAbove);
int y = lineArea.y + ascent;
int x = lineArea.x;
Element map = getElement();
int lineCount = map.getElementCount();
// Whether token styles should always be painted, even in selections
int selStart = host.getSelectionStart();
int selEnd = host.getSelectionEnd();
RSyntaxTextAreaHighlighter h = (RSyntaxTextAreaHighlighter) host.getHighlighter();
Graphics2D g2d = (Graphics2D) g;
Token token;
// System.err.println("Painting lines: " + linesAbove + " to " + (endLine-1));
TokenPainter painter = host.getTokenPainter();
int line = linesAbove;
// int count = 0;
while (y < clip.y + clip.height + ascent && line < lineCount) {
Fold fold = fm.getFoldForLine(line);
Element lineElement = map.getElement(line);
int startOffset = lineElement.getStartOffset();
// int endOffset = (line==lineCount ? lineElement.getEndOffset()-1 :
// lineElement.getEndOffset()-1);
int endOffset = lineElement.getEndOffset() - 1; // Why always "-1"?
h.paintLayeredHighlights(g2d, startOffset, endOffset, a, host, this);
// Paint a line of text.
token = document.getTokenListForLine(line);
if (selStart == selEnd || startOffset >= selEnd || endOffset < selStart) {
drawLine(painter, token, g2d, x, y, line);
} else {
// System.out.println("Drawing line with selection: " + line);
drawLineWithSelection(painter, token, g2d, x, y, selStart, selEnd);
}
if (fold != null && fold.isCollapsed()) {
// Visible indicator of collapsed lines
Color c = RSyntaxUtilities.getFoldedLineBottomColor(host);
if (c != null) {
g.setColor(c);
g.drawLine(x, y + lineHeight - ascent - 1, host.getWidth(), y + lineHeight - ascent - 1);
}
// Skip to next line to paint, taking extra care for lines with
// block ends and begins together, e.g. "} else {"
do {
int hiddenLineCount = fold.getLineCount();
if (hiddenLineCount == 0) {
// Fold parser identified a zero-line fold region.
// This is really a bug, but we'll be graceful here
// and avoid an infinite loop.
break;
}
line += hiddenLineCount;
fold = fm.getFoldForLine(line);
} while (fold != null && fold.isCollapsed());
}
y += lineHeight;
line++;
// count++;
}
// System.out.println("SyntaxView: lines painted=" + count);
}
/**
* Draws the passed-in text using syntax highlighting for the current language. Tokens are checked
* for being in a selected region, and are rendered appropriately if they are.
*
* @param painter The painter to render the tokens.
* @param token The list of tokens to draw.
* @param g The graphics context in which to draw.
* @param x The x-coordinate at which to draw.
* @param y The y-coordinate at which to draw.
* @param selStart The start of the selection.
* @param selEnd The end of the selection.
* @return The x-coordinate representing the end of the painted text.
*/
private float drawLineWithSelection(
TokenPainter painter, Token token, Graphics2D g, float x, float y, int selStart, int selEnd) {
float nextX = x; // The x-value at the end of our text.
boolean useSTC = host.getUseSelectedTextColor();
while (token != null && token.isPaintable() && nextX < clipEnd) {
// Selection starts in this token
if (token.containsPosition(selStart)) {
if (selStart > token.getOffset()) {
tempToken.copyFrom(token);
tempToken.textCount = selStart - tempToken.getOffset();
nextX = painter.paint(tempToken, g, nextX, y, host, this, clipStart);
tempToken.textCount = token.length();
tempToken.makeStartAt(selStart);
// Clone required since token and tempToken must be
// different tokens for else statement below
token = new TokenImpl(tempToken);
}
int tokenLen = token.length();
int selCount = Math.min(tokenLen, selEnd - token.getOffset());
if (selCount == tokenLen) {
nextX = painter.paintSelected(token, g, nextX, y, host, this, clipStart, useSTC);
} else {
tempToken.copyFrom(token);
tempToken.textCount = selCount;
nextX = painter.paintSelected(tempToken, g, nextX, y, host, this, clipStart, useSTC);
tempToken.textCount = token.length();
tempToken.makeStartAt(token.getOffset() + selCount);
token = tempToken;
nextX = painter.paint(token, g, nextX, y, host, this, clipStart);
}
}
// Selection ends in this token
else if (token.containsPosition(selEnd)) {
tempToken.copyFrom(token);
tempToken.textCount = selEnd - tempToken.getOffset();
nextX = painter.paintSelected(tempToken, g, nextX, y, host, this, clipStart, useSTC);
tempToken.textCount = token.length();
tempToken.makeStartAt(selEnd);
token = tempToken;
nextX = painter.paint(token, g, nextX, y, host, this, clipStart);
}
// This token is entirely selected
else if (token.getOffset() >= selStart && token.getEndOffset() <= selEnd) {
nextX = painter.paintSelected(token, g, nextX, y, host, this, clipStart, useSTC);
}
// This token is entirely unselected
else {
nextX = painter.paint(token, g, nextX, y, host, this, clipStart);
}
token = token.getNextToken();
}
// NOTE: We should re-use code from Token (paintBackground()) here,
// but don't because I'm just too lazy.
if (host.getEOLMarkersVisible()) {
g.setColor(host.getForegroundForTokenType(Token.WHITESPACE));
g.setFont(host.getFontForTokenType(Token.WHITESPACE));
g.drawString("\u00B6", nextX, y);
}
// Return the x-coordinate at the end of the painted text.
return nextX;
}
