/*
* 08/06/2004
*
* WrappedSyntaxView.java - Test implementation of WrappedSyntaxView that
* is also aware of RSyntaxTextArea's different fonts per token type.
* Copyright (C) 2004 Robert Futrell
* robert_futrell at users.sourceforge.net
* http://fifesoft.com/rsyntaxtextarea
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
*/
package org.fife.ui.rsyntaxtextarea;
import java.awt.*;
import javax.swing.JViewport;
import javax.swing.text.*;
import javax.swing.event.*;
import org.fife.ui.rtextarea.Gutter;
import org.fife.ui.rtextarea.RTextScrollPane;
/**
* The view used by {@link RSyntaxTextArea} when word wrap is enabled.
* <p>
*
* This class is a work-in-progress and will eventually replace {@link WrappedSyntaxView} (which works, but ignores
* token styles).
*
* @author Robert Futrell
* @version 0.2
*/
public class WrappedSyntaxView extends BoxView implements TabExpander,
RSTAView {
boolean widthChanging;
int tabBase;
int tabSize;
/**
* This is reused to keep from allocating/deallocating.
*/
private Segment s, drawSeg;
/**
* Another variable initialized once to keep from allocating/deallocating.
*/
private Rectangle tempRect;
/**
* Cached for each paint() call so each drawView() call has access to it.
*/
private RSyntaxTextArea host;
private FontMetrics metrics;
// /**
// * The end-of-line marker.
// */
// private static final char[] eolMarker = { '.' };
/**
* The width of this view cannot be below this amount, as if the width is ever 0 (really a bug), we'll go into an
* infinite loop.
*/
private static final int MIN_WIDTH = 20;
/**
* Creates a new WrappedSyntaxView. Lines will be wrapped on character boundaries.
*
* @param elem
* the element underlying the view
*/
public WrappedSyntaxView(Element elem) {
super(elem, Y_AXIS);
s = new Segment();
drawSeg = new Segment();
tempRect = new Rectangle();
}
/**
* This is called by the nested wrapped line views to determine the break location. This can be reimplemented to
* alter the breaking behavior. It will either break at word or character boundaries depending upon the break
* argument given at construction.
*/
protected int calculateBreakPosition(int p0, Token tokenList, float x0) {
// System.err.println("------ beginning calculateBreakPosition() --------");
int p = p0;
RSyntaxTextArea textArea = (RSyntaxTextArea) getContainer();
float currentWidth = getWidth();
if (currentWidth == Integer.MAX_VALUE)
currentWidth = getPreferredSpan(X_AXIS);
// Make sure width>0; this is a huge hack to fix a bug where
// loading text into an RTextArea before it is visible if word wrap
// is enabled causes an infinite loop in calculateBreakPosition()
// because of the 0-width! We cannot simply check in setSize()
// because the width is set to 0 somewhere else too somehow...
currentWidth = Math.max(currentWidth, MIN_WIDTH);
Token t = tokenList;
while (t != null && t.isPaintable()) {
// FIXME: Replace the code below with the commented-out line below. This will
// allow long tokens to be broken at embedded spaces (such as MLC's). But it
// currently throws BadLocationExceptions sometimes...
float tokenWidth = t.getWidth(textArea, this, x0);
if (tokenWidth > currentWidth) {
// If the current token alone is too long for this line,
// break at a character boundary.
if (p == p0) {
return t.getOffsetBeforeX(textArea, this, 0, currentWidth);
}
// Return the first non-whitespace char (i.e., don't start
// off the continuation of a wrapped line with whitespace).
return t.isWhitespace() ? p + t.textCount : p;
// return getBreakLocation(t, fm, x0, currentWidth, this);
}
currentWidth -= tokenWidth;
x0 += tokenWidth;
p += t.textCount;
// System.err.println("*** *** *** token fit entirely (width==" + tokenWidth + "), adding " + t.textCount +
// " to p, now p==" + p);
t = t.getNextToken();
}
// System.err.println("... ... whole line fits; returning p==" + p);
// System.err.println("------ ending calculateBreakPosition() --------");
// return p;
return p + 1;
}
// private int getBreakLocation(Token t, FontMetrics fm, int x0, int x,
// TabExpander e) {
// Segment s = new Segment();
// s.array = t.text;
// s.offset = t.textOffset;
// s.count = t.textCount;
// return t.offset + Utilities.getBreakLocation(s, fm, x0, x, e, t.offset);
// }
/**
* Gives notification from the document that attributes were changed in a location that this view is responsible
* for.
*
* @param e
* 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#changedUpdate
*/
public void changedUpdate(DocumentEvent e, Shape a, ViewFactory f) {
updateChildren(e, a);
}
/**
* Draws a single view (i.e., a line of text for a wrapped view), wrapping the text onto multiple lines if
* necessary.
*
* @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(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.type == 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.offset + token.textCount - 1 < p) {// <=p) {
x = token.paint(g, x, y, host, this);
token = token.getNextToken();
}
if (token != null && token.isPaintable() && token.offset < p) {
int tokenOffset = token.offset;
Token temp = new DefaultToken(drawSeg, tokenOffset - start,
p - 1 - start, tokenOffset,
token.type);
temp.paint(g, x, y, host, this);
temp = null;
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);
}
}
/**
* 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
*/
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
*/
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
*/
public float getPreferredSpan(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;
}
/**
* 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;
}
/**
* 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
*/
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 <code>setParent</code> 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
*/
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);
}
}
/**
* 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.
* <p>
*
* This is implemented to subtract the width of the second character, as this view's <code>modelToView</code>
* actually returns the width of the character instead of "1" or "0" like the View implementations in
* <code>javax.swing.text</code>. Thus, if we don't override this method, the <code>View</code> implementation will
* return one character's width too much for its consumers (implementations of
* <code>javax.swing.text.Highlighter</code>).
*
* @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; <code>b0</code> will have
* one of these values:
* <ul>
* <li> <code>Position.Bias.Forward</code> <li> <code>Position.Bias.Backward</code>
* </ul>
* @param p1
* the position of the last character (>=0)
* @param b1
* the bias for the second character position, defined one of the legal values shown above
* @param a
* the area of the view, which encompasses the requested region
* @return the bounding box which is a union of the region specified by the first and last character positions
* @exception BadLocationException
* if the given position does not represent a valid location in the associated document
* @exception IllegalArgumentException
* if <code>b0</code> or <code>b1</code> are not one of the legal <code>Position.Bias</code> values
* listed above
* @see View#viewToModel
*/
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
*/
public float nextTabStop(float x, int tabOffset) {
if (tabSize == 0)
return x;
int ntabs = ((int) x - tabBase) / tabSize;
return tabBase + ((ntabs + 1) * 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.
*/
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();
int n = getViewCount(); // Number of lines.
int x = alloc.x + getLeftInset();
int 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);
}
}
}
/**
* 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
*/
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 <code>Segment</code> 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
*/
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');
}
/**
* {@inheritDoc}
*/
public int yForLineContaining(Rectangle alloc, int offs)
throws BadLocationException {
// line coordinates
Element map = getElement();
int line = map.getElementIndex(offs);
if (isAllocationValid()) {
return alloc.y + getOffset(Y_AXIS, line);
}
return -1;
}
/**
* Simple view of a line that wraps if it doesn't fit withing 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 {
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;
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;
}
/**
* 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
*/
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
*/
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.
*/
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);
}
/**
* Provides a mapping from the view coordinate space to the logical coordinate space of the model.
*
* @param x
* the X coordinate
* @param y
* 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.
}
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
Container parent = textArea.getParent();
if (parent instanceof JViewport &&
parent.getParent() instanceof RTextScrollPane) {
RTextScrollPane sp = (RTextScrollPane) parent.getParent();
Gutter gutter = sp.getGutter();
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);
}
}
public void insertUpdate(DocumentEvent e, Shape a, ViewFactory f) {
handleDocumentEvent(e, a, f);
}
public void removeUpdate(DocumentEvent e, Shape a, ViewFactory f) {
handleDocumentEvent(e, a, f);
}
}
}