View 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,
int line) {
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)
// {
boolean paintBG = host.getPaintTokenBackgrounds(line, y);
x = painter.paint(token, g, x, y, host, this, 0, paintBG);
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());
tempToken.setLanguageIndex(token.getLanguageIndex());
boolean paintBG = host.getPaintTokenBackgrounds(line, y);
painter.paint(tempToken, g, x, y, host, this, 0, paintBG);
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, (float) y - fontHeight);
}
}
/**
* 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 View 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;
boolean useSTC = host.getUseSelectedTextColor();
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, useSTC);
} else {
tempToken.copyFrom(token);
tempToken.textCount = selCount;
x = painter.paintSelected(tempToken, g, x, y, host, this, useSTC);
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, useSTC);
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, useSTC);
}
// 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(),
token.getLanguageIndex());
token.setLanguageIndex(token.getLanguageIndex());
// 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, useSTC);
} else {
tempToken.copyFrom(token);
tempToken.textCount = selCount;
x = painter.paintSelected(tempToken, g, x, y, host, this, useSTC);
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, useSTC);
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, useSTC);
}
// 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, (float) y - fontHeight);
}
}
/**
* Fetches the allocation for the given child view.
*
* Overridden to account for code folding.
*
* @param index The index of the child, >= 0 &&< getViewCount().
* @param a The allocation to this view
* @return The allocation to the child; or null if a
* is null; or null if the layout is invalid
*/
@Override
public Shape getChildAllocation(int index, Shape a) {
if (a != null) {
Shape ca = getChildAllocationImpl(index, a);
if ((ca != null) && (!isAllocationValid())) {
// The child allocation may not have been set yet.
Rectangle r = (ca instanceof Rectangle) ? (Rectangle) ca : ca.getBounds();
if ((r.width == 0) && (r.height == 0)) {
return null;
}
}
return ca;
}
return null;
}
/**
* Fetches the allocation for the given child view to render into.
*
* 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;
}
/**
* Determines the maximum 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#getMaximumSpan
*/
@Override
public float getMaximumSpan(int axis) {
updateMetrics();
float span = super.getPreferredSpan(axis);
if (axis == View.X_AXIS) { // EOL marker
span += metrics.charWidth('\u00b6'); // metrics set in updateMetrics
}
return span;
}
/**
* Determines the minimum 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#getMinimumSpan
*/
@Override
public float getMinimumSpan(int axis) {
updateMetrics();
float span = super.getPreferredSpan(axis);
if (axis == View.X_AXIS) { // EOL marker
span += metrics.charWidth('\u00b6'); // metrics set in updateMetrics
}
return span;
}
/**
* 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
*/
@Override
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;
}
/**
* Returns the tab size set for the document, defaulting to 5.
*
* @return the tab size
*/
protected int getTabSize() {
Integer i = (Integer) getDocument().getProperty(PlainDocument.tabSizeAttribute);
int size = (i != null) ? i.intValue() : 5;
return size;
}
/**
* 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);
}
/**
* Gives notification that something was inserted into the document in a
* location that this view is responsible for. This is implemented to simply
* update the children.
*
* @param changes The change information from the associated document.
* @param a the current allocation of the view
* @param f the factory to use to rebuild if the view has children
* @see View#insertUpdate
*/
@Override
public void insertUpdate(DocumentEvent changes, Shape a, ViewFactory f) {
updateChildren(changes, a);
Rectangle alloc = ((a != null) && isAllocationValid()) ? getInsideAllocation(a) : null;
int pos = changes.getOffset();
View v = getViewAtPosition(pos, alloc);
if (v != null) {
v.insertUpdate(changes, alloc, f);
}
}
/**
* Loads all of the children to initialize the view. This is called by the
* setParent method. Subclasses can re-implement this to initialize
* their child views in a different manner. The default implementation creates a
* child view for each child element.
*
* @param f the view factory
*/
@Override
protected void loadChildren(ViewFactory f) {
Element e = getElement();
int n = e.getElementCount();
if (n > 0) {
View[] added = new View[n];
for (int i = 0; i < n; i++) {
added[i] = new WrappedLine(e.getElement(i));
}
replace(0, 0, added);
}
}
@Override
public Shape modelToView(int pos, Shape a, Position.Bias b) throws BadLocationException {
if (!isAllocationValid()) {
Rectangle alloc = a.getBounds();
setSize(alloc.width, alloc.height);
}
boolean isBackward = (b == Position.Bias.Backward);
int testPos = (isBackward) ? Math.max(0, pos - 1) : pos;
if (isBackward && testPos < getStartOffset()) {
return null;
}
int vIndex = getViewIndexAtPosition(testPos);
if ((vIndex != -1) && (vIndex < getViewCount())) {
View v = getView(vIndex);
if (v != null && testPos >= v.getStartOffset() && testPos < v.getEndOffset()) {
Shape childShape = getChildAllocation(vIndex, a);
if (childShape == null) {
// We are likely invalid, fail.
return null;
}
Shape retShape = v.modelToView(pos, childShape, b);
if (retShape == null && v.getEndOffset() == pos) {
if (++vIndex < getViewCount()) {
v = getView(vIndex);
retShape = v.modelToView(pos, getChildAllocation(vIndex, a), b);
}
}
return retShape;
}
}
throw new BadLocationException("Position not represented by view", pos);
}
/**
* Provides a mapping, for a given region, from the document model coordinate
* space to the view coordinate space. The specified region is created as a
* union of the first and last character positions.
*
*
* This is implemented to subtract the width of the second character, as this
* view's modelToView actually returns the width of the character
* instead of "1" or "0" like the View implementations in
* javax.swing.text. Thus, if we don't override this method, the
* View implementation will return one character's width too much
* for its consumers (implementations of
* javax.swing.text.Highlighter).
*
* @param p0 the position of the first character (>=0)
* @param b0 The bias of the first character position, toward the previous
* character or the next character represented by the offset, in case
* the position is a boundary of two views; b0 will have
* one of these values:
*
Position.Bias.Forward
* Position.Bias.Backward
* b0 or b1 are
* not one of the legal
* Position.Bias values listed
* above
* @see View#viewToModel
*/
@Override
public Shape modelToView(int p0, Position.Bias b0, int p1, Position.Bias b1, Shape a) throws BadLocationException {
Shape s0 = modelToView(p0, a, b0);
Shape s1;
if (p1 == getEndOffset()) {
try {
s1 = modelToView(p1, a, b1);
} catch (BadLocationException ble) {
s1 = null;
}
if (s1 == null) {
// Assume extends left to right.
Rectangle alloc = (a instanceof Rectangle) ? (Rectangle) a : a.getBounds();
s1 = new Rectangle(alloc.x + alloc.width - 1, alloc.y, 1, alloc.height);
}
} else {
s1 = modelToView(p1, a, b1);
}
Rectangle r0 = s0.getBounds();
Rectangle r1 = (s1 instanceof Rectangle) ? (Rectangle) s1 : s1.getBounds();
if (r0.y != r1.y) {
// If it spans lines, force it to be the width of the view.
Rectangle alloc = (a instanceof Rectangle) ? (Rectangle) a : a.getBounds();
r0.x = alloc.x;
r0.width = alloc.width;
}
r0.add(r1);
// The next line is the only difference between this method and
// View's implementation. We're subtracting the width of the second
// character. This is because this method is used by Highlighter
// implementations to get the area to "highlight", and if we don't do
// this, one character too many is highlighted thanks to our
// modelToView() implementation returning the actual width of the
// character requested!
if (p1 > p0) {
r0.width -= r1.width;
}
return r0;
}
/**
* Returns the next tab stop position after a given reference position. This
* implementation does not support things like centering so it ignores the
* tabOffset argument.
*
* @param x the current position >= 0
* @param tabOffset the position within the text stream that the tab occurred at
* >= 0.
* @return the tab stop, measured in points >= 0
*/
@Override
public float nextTabStop(float x, int tabOffset) {
if (tabSize == 0) {
return x;
}
int ntabs = ((int) x - tabBase) / tabSize;
return tabBase + ((ntabs + 1f) * tabSize);
}
/**
* 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.
*/
@Override
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();
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 (selStart == selEnd || startOffset >= selEnd || endOffset < selStart) {
drawView(painter, g2d, alloc, view, fontHeight, tempRect.y + ascent, i);
} 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, host.getWidth(), tempRect.y - 1);
}
}
}
}
/**
* Gives notification that something was removed from the document in a location
* that this view is responsible for. This is implemented to simply update the
* children.
*
* @param changes The change information from the associated document.
* @param a the current allocation of the view
* @param f the factory to use to rebuild if the view has children
* @see View#removeUpdate
*/
@Override
public void removeUpdate(DocumentEvent changes, Shape a, ViewFactory f) {
updateChildren(changes, a);
Rectangle alloc = ((a != null) && isAllocationValid()) ? getInsideAllocation(a) : null;
int pos = changes.getOffset();
View v = getViewAtPosition(pos, alloc);
if (v != null) {
v.removeUpdate(changes, alloc, f);
}
}
/**
* Makes a Segment point to the text in our document between the
* given positions. Note that the positions MUST be valid positions in the
* document.
*
* @param p0 The first position in the document.
* @param p1 The second position in the document.
* @param document The document from which you want to get the text.
* @param seg The segment in which to load the text.
*/
private void setSegment(int p0, int p1, Document document, Segment seg) {
try {
// System.err.println("... in setSharedSegment, p0/p1==" + p0 + "/"
// + p1);
document.getText(p0, p1 - p0, seg);
// System.err.println("... in setSharedSegment: s=='" + s + "';
// line/numLines==" + line + "/" + numLines);
} catch (BadLocationException ble) { // Never happens
ble.printStackTrace();
}
}
/**
* Sets the size of the view. This should cause layout of the view along the
* given axis, if it has any layout duties.
*
* @param width the width >= 0
* @param height the height >= 0
*/
@Override
public void setSize(float width, float height) {
updateMetrics();
if ((int) width != getWidth()) {
// invalidate the view itself since the childrens
// desired widths will be based upon this views width.
preferenceChanged(null, true, true);
widthChanging = true;
}
super.setSize(width, height);
widthChanging = false;
}
/**
* Update the child views in response to a document event.
*/
void updateChildren(DocumentEvent e, Shape a) {
Element elem = getElement();
DocumentEvent.ElementChange ec = e.getChange(elem);
// This occurs when syntax highlighting only changes on lines
// (i.e. beginning a multiline comment).
if (e.getType() == DocumentEvent.EventType.CHANGE) {
// System.err.println("Updating the damage due to a CHANGE
// event...");
// FIXME: Make me repaint more intelligently.
getContainer().repaint();
// damageLineRange(startLine,endLine, a, host);
} else if (ec != null) {
// the structure of this element changed.
Element[] removedElems = ec.getChildrenRemoved();
Element[] addedElems = ec.getChildrenAdded();
View[] added = new View[addedElems.length];
for (int i = 0; i < addedElems.length; i++) {
added[i] = new WrappedLine(addedElems[i]);
}
// System.err.println("Replacing " + removedElems.length +
// " children with " + addedElems.length);
replace(ec.getIndex(), removedElems.length, added);
// should damge a little more intelligently.
if (a != null) {
preferenceChanged(null, true, true);
getContainer().repaint();
}
}
// update font metrics which may be used by the child views
updateMetrics();
}
final void updateMetrics() {
Component host = getContainer();
Font f = host.getFont();
metrics = host.getFontMetrics(f); // Metrics for the default font.
tabSize = getTabSize() * metrics.charWidth('m');
}
@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;
}
/**
* {@inheritDoc}
*/
@Override
public int yForLine(Rectangle alloc, int line) throws BadLocationException {
return yForLineContaining(alloc, getElement().getElement(line).getStartOffset());
// return alloc.y + getOffset(Y_AXIS, line);
}
/**
* {@inheritDoc}
*/
@Override
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;
}
/**
* Simple view of a line that wraps if it doesn't fit within the horizontal
* space allocated. This class tries to be lightweight by carrying little state
* of it's own and sharing the state of the outer class with it's siblings.
*/
class WrappedLine extends View {
private int nlines;
WrappedLine(Element elem) {
super(elem);
}
/**
* 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;
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);
// 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;
}
/**
* Determines the preferred span for this view along an axis.
*
* @param axis may be either X_AXIS or 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
*/
@Override
public float getPreferredSpan(int axis) {
switch (axis) {
case View.X_AXIS:
float width = getWidth();
if (width == Integer.MAX_VALUE) {
// We have been initially set to MAX_VALUE, but we don't
// want this as our preferred.
return 100f;
}
return width;
case View.Y_AXIS:
if (nlines == 0 || widthChanging) {
nlines = calculateLineCount();
}
int h = nlines * ((RSyntaxTextArea) getContainer()).getLineHeight();
return h;
default:
throw new IllegalArgumentException("Invalid axis: " + axis);
}
}
/**
* Renders using the given rendering surface and area on that surface. The view
* may need to do layout and create child views to enable itself to render into
* the given allocation.
*
* @param g the rendering surface to use
* @param a the allocated region to render into
* @see View#paint
*/
@Override
public void paint(Graphics g, Shape a) {
// This is done by drawView() above.
}
/**
* 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);
}
/**
* 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 if (tlist != null) {
// 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