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|
/*******************************************************************************
* Copyright (c) 2000, 2009 IBM Corporation and others.
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* which accompanies this distribution, and is available at
* http://www.eclipse.org/legal/epl-v10.html
*
* Contributors:
* IBM Corporation - initial API and implementation
*******************************************************************************/
package org.eclipse.swt.graphics;
import org.eclipse.swt.internal.*;
import org.eclipse.swt.internal.cocoa.*;
import org.eclipse.swt.*;
/**
* <code>TextLayout</code> is a graphic object that represents
* styled text.
* <p>
* Instances of this class provide support for drawing, cursor
* navigation, hit testing, text wrapping, alignment, tab expansion
* line breaking, etc. These are aspects required for rendering internationalized text.
* </p><p>
* Application code must explicitly invoke the <code>TextLayout#dispose()</code>
* method to release the operating system resources managed by each instance
* when those instances are no longer required.
* </p>
*
* @see <a href="http://www.eclipse.org/swt/snippets/#textlayout">TextLayout, TextStyle snippets</a>
* @see <a href="http://www.eclipse.org/swt/examples.php">SWT Example: CustomControlExample, StyledText tab</a>
* @see <a href="http://www.eclipse.org/swt/">Sample code and further information</a>
*
* @since 3.0
*/
public final class TextLayout extends Resource {
NSTextStorage textStorage;
NSLayoutManager layoutManager;
NSTextContainer textContainer;
Font font;
String text;
StyleItem[] styles;
int stylesCount;
int spacing, ascent, descent, indent, wrapIndent;
boolean justify;
int alignment;
int[] tabs;
int[] segments;
char[] segmentsChars;
int wrapWidth;
int orientation;
int[] lineOffsets;
NSRect[] lineBounds;
// the following Callbacks are never freed
static Callback textLayoutCallback2;
static final byte[] SWT_OBJECT = {'S', 'W', 'T', '_', 'O', 'B', 'J', 'E', 'C', 'T', '\0'};
static final int TAB_COUNT = 32;
static final int UNDERLINE_THICK = 1 << 16;
static final RGB LINK_FOREGROUND = new RGB (0, 51, 153);
int[] invalidOffsets;
static final char LTR_MARK = '\u200E', RTL_MARK = '\u200F';
static class StyleItem {
TextStyle style;
int start;
int /*long*/ jniRef;
NSCell cell;
public String toString () {
return "StyleItem {" + start + ", " + style + "}";
}
}
/**
* Constructs a new instance of this class on the given device.
* <p>
* You must dispose the text layout when it is no longer required.
* </p>
*
* @param device the device on which to allocate the text layout
*
* @exception IllegalArgumentException <ul>
* <li>ERROR_NULL_ARGUMENT - if device is null and there is no current device</li>
* </ul>
*
* @see #dispose()
*/
public TextLayout (Device device) {
super(device);
wrapWidth = ascent = descent = -1;
alignment = SWT.LEFT;
orientation = SWT.LEFT_TO_RIGHT;
text = "";
styles = new StyleItem[2];
styles[0] = new StyleItem();
styles[1] = new StyleItem();
stylesCount = 2;
init();
}
void checkLayout() {
if (isDisposed()) SWT.error(SWT.ERROR_GRAPHIC_DISPOSED);
}
float[] computePolyline(int left, int top, int right, int bottom) {
int height = bottom - top; // can be any number
int width = 2 * height; // must be even
int peaks = Compatibility.ceil(right - left, width);
if (peaks == 0 && right - left > 2) {
peaks = 1;
}
int length = ((2 * peaks) + 1) * 2;
if (length < 0) return new float[0];
float[] coordinates = new float[length];
for (int i = 0; i < peaks; i++) {
int index = 4 * i;
coordinates[index] = left + (width * i);
coordinates[index+1] = bottom;
coordinates[index+2] = coordinates[index] + width / 2;
coordinates[index+3] = top;
}
coordinates[length-2] = left + (width * peaks);
coordinates[length-1] = bottom;
return coordinates;
}
void computeRuns() {
if (lineBounds != null) return;
String segmentsText = getSegmentsText();
char[] chars = new char[segmentsText.length()];
segmentsText.getChars(0, chars.length, chars, 0);
NSString str = (NSString) new NSString().alloc();
str = str.initWithCharacters(chars, chars.length);
/*
* Bug in Cocoa. Adding attributes directly to a NSTextStorage causes
* output to the console and eventually a segmentation fault when printing
* on a thread other than the main thread. The fix is to add attributes to
* a separate NSMutableAttributedString and set it to text storage when done.
*/
NSMutableAttributedString attrStr = (NSMutableAttributedString)new NSMutableAttributedString().alloc();
attrStr.id = attrStr.initWithString(str).id;
str.release();
attrStr.beginEditing();
Font defaultFont = font != null ? font : device.systemFont;
NSRange range = new NSRange();
range.length = attrStr.length();
attrStr.addAttribute(OS.NSFontAttributeName, defaultFont.handle, range);
defaultFont.addTraits(attrStr, range);
//TODO ascend descent wrap
NSMutableParagraphStyle paragraph = (NSMutableParagraphStyle)new NSMutableParagraphStyle().alloc().init();
int align = OS.NSLeftTextAlignment;
if (justify) {
align = OS.NSJustifiedTextAlignment;
} else {
switch (alignment) {
case SWT.CENTER:
align = OS.NSCenterTextAlignment;
break;
case SWT.RIGHT:
align = OS.NSRightTextAlignment;
}
}
if ((orientation & SWT.RIGHT_TO_LEFT) != 0) {
paragraph.setBaseWritingDirection(OS.NSWritingDirectionRightToLeft);
} else {
paragraph.setBaseWritingDirection(OS.NSWritingDirectionLeftToRight);
}
paragraph.setAlignment(align);
paragraph.setLineSpacing(spacing);
paragraph.setFirstLineHeadIndent(indent);
paragraph.setHeadIndent(wrapIndent);
paragraph.setLineBreakMode(wrapWidth != -1 ? OS.NSLineBreakByWordWrapping : OS.NSLineBreakByClipping);
paragraph.setTabStops(NSArray.array());
if (tabs != null && tabs.length > 0) {
int count = tabs.length;
if (count == 1) {
paragraph.setDefaultTabInterval(tabs[0]);
} else {
int i, pos = 0;
for (i = 0; i < count; i++) {
pos = tabs[i];
NSTextTab tab = (NSTextTab)new NSTextTab().alloc();
tab = tab.initWithType(OS.NSLeftTabStopType, pos);
paragraph.addTabStop(tab);
tab.release();
}
int width = tabs[count - 1] - tabs[count - 2];
for (; i < TAB_COUNT; i++) {
pos += width;
NSTextTab tab = (NSTextTab)new NSTextTab().alloc();
tab = tab.initWithType(OS.NSLeftTabStopType, pos);
paragraph.addTabStop(tab);
tab.release();
}
}
}
attrStr.addAttribute(OS.NSParagraphStyleAttributeName, paragraph, range);
paragraph.release();
int /*long*/ textLength = attrStr.length();
for (int i = 0; i < stylesCount - 1; i++) {
StyleItem run = styles[i];
if (run.style == null) continue;
TextStyle style = run.style;
range.location = textLength != 0 ? translateOffset(run.start) : 0;
range.length = translateOffset(styles[i + 1].start) - range.location;
Font font = style.font;
if (font != null) {
attrStr.addAttribute(OS.NSFontAttributeName, font.handle, range);
font.addTraits(attrStr, range);
}
Color foreground = style.foreground;
if (foreground != null) {
NSColor color = NSColor.colorWithDeviceRed(foreground.handle[0], foreground.handle[1], foreground.handle[2], 1);
attrStr.addAttribute(OS.NSForegroundColorAttributeName, color, range);
}
Color background = style.background;
if (background != null) {
NSColor color = NSColor.colorWithDeviceRed(background.handle[0], background.handle[1], background.handle[2], 1);
attrStr.addAttribute(OS.NSBackgroundColorAttributeName, color, range);
}
if (style.strikeout) {
attrStr.addAttribute(OS.NSStrikethroughStyleAttributeName, NSNumber.numberWithInt(OS.NSUnderlineStyleSingle), range);
Color strikeColor = style.strikeoutColor;
if (strikeColor != null) {
NSColor color = NSColor.colorWithDeviceRed(strikeColor.handle[0], strikeColor.handle[1], strikeColor.handle[2], 1);
attrStr.addAttribute(OS.NSStrikethroughColorAttributeName, color, range);
}
}
if (isUnderlineSupported(style)) {
int underlineStyle = 0;
switch (style.underlineStyle) {
case SWT.UNDERLINE_SINGLE:
underlineStyle = OS.NSUnderlineStyleSingle;
break;
case SWT.UNDERLINE_DOUBLE:
underlineStyle = OS.NSUnderlineStyleDouble;
break;
case UNDERLINE_THICK:
underlineStyle = OS.NSUnderlineStyleThick;
break;
case SWT.UNDERLINE_LINK: {
underlineStyle = OS.NSUnderlineStyleSingle;
if (foreground == null) {
NSColor color = NSColor.colorWithDeviceRed(LINK_FOREGROUND.red / 255f, LINK_FOREGROUND.green / 255f, LINK_FOREGROUND.blue / 255f, 1);
attrStr.addAttribute(OS.NSForegroundColorAttributeName, color, range);
}
break;
}
}
if (underlineStyle != 0) {
attrStr.addAttribute(OS.NSUnderlineStyleAttributeName, NSNumber.numberWithInt(underlineStyle), range);
Color underlineColor = style.underlineColor;
if (underlineColor != null) {
NSColor color = NSColor.colorWithDeviceRed(underlineColor.handle[0], underlineColor.handle[1], underlineColor.handle[2], 1);
attrStr.addAttribute(OS.NSUnderlineColorAttributeName, color, range);
}
}
}
if (style.rise != 0) {
attrStr.addAttribute(OS.NSBaselineOffsetAttributeName, NSNumber.numberWithInt(style.rise), range);
}
if (style.metrics != null) {
initClasses();
char [] buffer = new char [(int)range.length];
for (int j = 0; j < buffer.length; j++) {
buffer[j] = '\uFFFC';
}
NSString string = (NSString) new NSString().alloc();
string = string.initWithCharacters(buffer, buffer.length);
attrStr.replaceCharactersInRange(range, string);
string.release();
run.jniRef = OS.NewGlobalRef(run);
if (run.jniRef == 0) SWT.error(SWT.ERROR_NO_HANDLES);
run.cell = (SWTTextAttachmentCell) new SWTTextAttachmentCell().alloc().init();
OS.object_setInstanceVariable(run.cell.id, SWT_OBJECT, run.jniRef);
NSTextAttachment attachment = ((NSTextAttachment)new NSTextAttachment().alloc()).initWithFileWrapper(null);
attachment.setAttachmentCell(run.cell);
attrStr.addAttribute(OS.NSAttachmentAttributeName, attachment, range);
attachment.release();
}
}
attrStr.endEditing();
NSSize size = new NSSize();
size.width = wrapWidth != -1 ? wrapWidth : Float.MAX_VALUE;
size.height = Float.MAX_VALUE;
if (textStorage == null) {
textStorage = (NSTextStorage)new NSTextStorage().alloc().init();
layoutManager = (NSLayoutManager)new NSLayoutManager().alloc().init();
layoutManager.setBackgroundLayoutEnabled(NSThread.isMainThread());
textContainer = (NSTextContainer)new NSTextContainer().alloc();
textContainer = textContainer.initWithContainerSize(size);
textContainer.setLineFragmentPadding(0);
textStorage.addLayoutManager(layoutManager);
layoutManager.addTextContainer(textContainer);
layoutManager.release();
textContainer.release();
} else {
textContainer.setContainerSize(size);
}
textStorage.setAttributedString(attrStr);
attrStr.release();
int numberOfLines;
layoutManager.glyphRangeForTextContainer(textContainer);
int /*long*/ numberOfGlyphs = layoutManager.numberOfGlyphs(), index;
int /*long*/ rangePtr = OS.malloc(NSRange.sizeof);
NSRange lineRange = new NSRange();
for (numberOfLines = 0, index = 0; index < numberOfGlyphs; numberOfLines++){
layoutManager.lineFragmentUsedRectForGlyphAtIndex(index, rangePtr, true);
OS.memmove(lineRange, rangePtr, NSRange.sizeof);
index = lineRange.location + lineRange.length;
}
if (numberOfLines == 0) numberOfLines++;
int[] offsets = new int[numberOfLines + 1];
NSRect[] bounds = new NSRect[numberOfLines];
for (numberOfLines = 0, index = 0; index < numberOfGlyphs; numberOfLines++){
bounds[numberOfLines] = layoutManager.lineFragmentUsedRectForGlyphAtIndex(index, rangePtr, true);
if (numberOfLines < bounds.length - 1) bounds[numberOfLines].height -= spacing;
OS.memmove(lineRange, rangePtr, NSRange.sizeof);
offsets[numberOfLines] = (int)/*64*/lineRange.location;
index = lineRange.location + lineRange.length;
}
if (numberOfLines == 0) {
Font font = this.font != null ? this.font : device.systemFont;
NSFont nsFont = font.handle;
bounds[0] = new NSRect();
bounds[0].height = Math.max(layoutManager.defaultLineHeightForFont(nsFont), ascent + descent);
}
OS.free(rangePtr);
offsets[numberOfLines] = (int)/*64*/textStorage.length();
this.lineOffsets = offsets;
this.lineBounds = bounds;
}
void destroy() {
freeRuns();
if (textStorage != null) textStorage.release();
textStorage = null;
layoutManager = null;
textContainer = null;
font = null;
text = null;
styles = null;
segments = null;
segmentsChars = null;
}
/**
* Draws the receiver's text using the specified GC at the specified
* point.
*
* @param gc the GC to draw
* @param x the x coordinate of the top left corner of the rectangular area where the text is to be drawn
* @param y the y coordinate of the top left corner of the rectangular area where the text is to be drawn
*
* @exception SWTException <ul>
* <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li>
* </ul>
* @exception IllegalArgumentException <ul>
* <li>ERROR_NULL_ARGUMENT - if the gc is null</li>
* </ul>
*/
public void draw(GC gc, int x, int y) {
draw(gc, x, y, -1, -1, null, null);
}
/**
* Draws the receiver's text using the specified GC at the specified
* point.
*
* @param gc the GC to draw
* @param x the x coordinate of the top left corner of the rectangular area where the text is to be drawn
* @param y the y coordinate of the top left corner of the rectangular area where the text is to be drawn
* @param selectionStart the offset where the selections starts, or -1 indicating no selection
* @param selectionEnd the offset where the selections ends, or -1 indicating no selection
* @param selectionForeground selection foreground, or NULL to use the system default color
* @param selectionBackground selection background, or NULL to use the system default color
*
* @exception SWTException <ul>
* <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li>
* </ul>
* @exception IllegalArgumentException <ul>
* <li>ERROR_NULL_ARGUMENT - if the gc is null</li>
* </ul>
*/
public void draw(GC gc, int x, int y, int selectionStart, int selectionEnd, Color selectionForeground, Color selectionBackground) {
draw(gc, x, y, selectionStart, selectionEnd, selectionForeground, selectionBackground, 0);
}
/**
* Draws the receiver's text using the specified GC at the specified
* point.
* <p>
* The parameter <code>flags</code> can include one of <code>SWT.DELIMITER_SELECTION</code>
* or <code>SWT.FULL_SELECTION</code> to specify the selection behavior on all lines except
* for the last line, and can also include <code>SWT.LAST_LINE_SELECTION</code> to extend
* the specified selection behavior to the last line.
* </p>
* @param gc the GC to draw
* @param x the x coordinate of the top left corner of the rectangular area where the text is to be drawn
* @param y the y coordinate of the top left corner of the rectangular area where the text is to be drawn
* @param selectionStart the offset where the selections starts, or -1 indicating no selection
* @param selectionEnd the offset where the selections ends, or -1 indicating no selection
* @param selectionForeground selection foreground, or NULL to use the system default color
* @param selectionBackground selection background, or NULL to use the system default color
* @param flags drawing options
*
* @exception SWTException <ul>
* <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li>
* </ul>
* @exception IllegalArgumentException <ul>
* <li>ERROR_NULL_ARGUMENT - if the gc is null</li>
* </ul>
*
* @since 3.3
*/
public void draw(GC gc, int x, int y, int selectionStart, int selectionEnd, Color selectionForeground, Color selectionBackground, int flags) {
checkLayout ();
if (gc == null) SWT.error(SWT.ERROR_NULL_ARGUMENT);
if (gc.isDisposed()) SWT.error(SWT.ERROR_INVALID_ARGUMENT);
if (selectionForeground != null && selectionForeground.isDisposed()) SWT.error(SWT.ERROR_INVALID_ARGUMENT);
if (selectionBackground != null && selectionBackground.isDisposed()) SWT.error(SWT.ERROR_INVALID_ARGUMENT);
NSAutoreleasePool pool = gc.checkGC(GC.CLIPPING | GC.TRANSFORM | GC.FOREGROUND);
try {
computeRuns();
int length = translateOffset(text.length());
if (length == 0 && flags == 0) return;
gc.handle.saveGraphicsState();
NSPoint pt = new NSPoint();
pt.x = x;
pt.y = y;
NSRange range = new NSRange();
int /*long*/ numberOfGlyphs = layoutManager.numberOfGlyphs();
if (numberOfGlyphs > 0) {
range.location = 0;
range.length = numberOfGlyphs;
layoutManager.drawBackgroundForGlyphRange(range, pt);
}
boolean hasSelection = selectionStart <= selectionEnd && selectionStart != -1 && selectionEnd != -1;
if (hasSelection || (flags & SWT.LAST_LINE_SELECTION) != 0) {
if (selectionBackground == null) selectionBackground = device.getSystemColor(SWT.COLOR_LIST_SELECTION);
NSColor selectionColor = NSColor.colorWithDeviceRed(selectionBackground.handle[0], selectionBackground.handle[1], selectionBackground.handle[2], selectionBackground.handle[3]);
NSBezierPath path = NSBezierPath.bezierPath();
NSRect rect = new NSRect();
if (hasSelection) {
range.location = translateOffset(selectionStart);
range.length = translateOffset(selectionEnd - selectionStart + 1);
int /*long*/ [] rectCount = new int /*long*/ [1];
int /*long*/ pArray = layoutManager.rectArrayForCharacterRange(range, range, textContainer, rectCount);
for (int k = 0; k < rectCount[0]; k++, pArray += NSRect.sizeof) {
OS.memmove(rect, pArray, NSRect.sizeof);
fixRect(rect);
rect.x += pt.x;
rect.y += pt.y;
rect.height = Math.max(rect.height, ascent + descent);
path.appendBezierPathWithRect(rect);
}
}
//TODO draw full selection for wrapped text
if ((flags & SWT.LAST_LINE_SELECTION) != 0) {
NSRect bounds = lineBounds[lineBounds.length - 1];
rect.x = pt.x + bounds.x + bounds.width;
rect.y = y + bounds.y;
rect.width = (flags & SWT.FULL_SELECTION) != 0 ? 0x7fffffff : bounds.height / 3;
rect.height = Math.max(bounds.height, ascent + descent);
path.appendBezierPathWithRect(rect);
}
selectionColor.setFill();
path.fill();
}
if (numberOfGlyphs > 0) {
range.location = 0;
range.length = numberOfGlyphs;
float /*double*/ [] fg = gc.data.foreground;
boolean defaultFg = fg[0] == 0 && fg[1] == 0 && fg[2] == 0 && fg[3] == 1 && gc.data.alpha == 255;
if (!defaultFg) {
for (int i = 0; i < stylesCount - 1; i++) {
StyleItem run = styles[i];
if (run.style != null && run.style.foreground != null) continue;
if (run.style != null && run.style.underline && run.style.underlineStyle == SWT.UNDERLINE_LINK) continue;
range.location = length != 0 ? translateOffset(run.start) : 0;
range.length = translateOffset(styles[i + 1].start) - range.location;
layoutManager.addTemporaryAttribute(OS.NSForegroundColorAttributeName, gc.data.fg, range);
}
}
range.location = 0;
range.length = numberOfGlyphs;
layoutManager.drawGlyphsForGlyphRange(range, pt);
if (!defaultFg) {
range.location = 0;
range.length = length;
layoutManager.removeTemporaryAttribute(OS.NSForegroundColorAttributeName, range);
}
NSPoint point = new NSPoint();
for (int j = 0; j < stylesCount; j++) {
StyleItem run = styles[j];
TextStyle style = run.style;
if (style == null) continue;
boolean drawUnderline = style.underline && !isUnderlineSupported(style);
drawUnderline = drawUnderline && (j + 1 == stylesCount || !style.isAdherentUnderline(styles[j + 1].style));
boolean drawBorder = style.borderStyle != SWT.NONE;
drawBorder = drawBorder && (j + 1 == stylesCount || !style.isAdherentBorder(styles[j + 1].style));
if (!drawUnderline && !drawBorder) continue;
int end = j + 1 < stylesCount ? translateOffset(styles[j + 1].start - 1) : length;
for (int i = 0; i < lineOffsets.length - 1; i++) {
int lineStart = untranslateOffset(lineOffsets[i]);
int lineEnd = untranslateOffset(lineOffsets[i + 1] - 1);
if (drawUnderline) {
int start = run.start;
for (int k = j; k > 0 && style.isAdherentUnderline(styles[k - 1].style); k--) {
start = styles[k - 1].start;
}
start = translateOffset(start);
if (!(start > lineEnd || end < lineStart)) {
range.location = Math.max(lineStart, start);
range.length = Math.min(lineEnd, end) + 1 - range.location;
if (range.length > 0) {
int /*long*/ [] rectCount = new int /*long*/ [1];
int /*long*/ pArray = layoutManager.rectArrayForCharacterRange(range, range, textContainer, rectCount);
NSRect rect = new NSRect();
gc.handle.saveGraphicsState();
float /*double*/ baseline = layoutManager.typesetter().baselineOffsetInLayoutManager(layoutManager, lineStart);
float /*double*/ [] color = null;
if (style.underlineColor != null) color = style.underlineColor.handle;
if (color == null && style.foreground != null) color = style.foreground.handle;
if (color != null) {
NSColor.colorWithDeviceRed(color[0], color[1], color[2], color[3]).setStroke();
}
for (int k = 0; k < rectCount[0]; k++, pArray += NSRect.sizeof) {
OS.memmove(rect, pArray, NSRect.sizeof);
fixRect(rect);
float /*double*/ underlineX = pt.x + rect.x;
float /*double*/ underlineY = pt.y + rect.y + rect.height - baseline + 1;
NSBezierPath path = NSBezierPath.bezierPath();
switch (style.underlineStyle) {
case SWT.UNDERLINE_ERROR: {
path.setLineWidth(2f);
path.setLineCapStyle(OS.NSRoundLineCapStyle);
path.setLineJoinStyle(OS.NSRoundLineJoinStyle);
path.setLineDash(new float /*double*/ []{1, 3f}, 2, 0);
point.x = underlineX;
point.y = underlineY + 0.5f;
path.moveToPoint(point);
point.x = underlineX + rect.width;
point.y = underlineY + 0.5f;
path.lineToPoint(point);
break;
}
case SWT.UNDERLINE_SQUIGGLE: {
gc.handle.setShouldAntialias(false);
path.setLineWidth(1.0f);
path.setLineCapStyle(OS.NSButtLineCapStyle);
path.setLineJoinStyle(OS.NSMiterLineJoinStyle);
float /*double*/ lineBottom = pt.y + rect.y + rect.height;
float squigglyThickness = 1;
float squigglyHeight = 2 * squigglyThickness;
float /*double*/ squigglyY = Math.min(underlineY - squigglyHeight / 2, lineBottom - squigglyHeight - 1);
float[] points = computePolyline((int)underlineX, (int)squigglyY, (int)(underlineX + rect.width), (int)(squigglyY + squigglyHeight));
point.x = points[0] + 0.5f;
point.y = points[1] + 0.5f;
path.moveToPoint(point);
for (int p = 2; p < points.length; p+=2) {
point.x = points[p] + 0.5f;
point.y = points[p+1] + 0.5f;
path.lineToPoint(point);
}
break;
}
}
path.stroke();
}
gc.handle.restoreGraphicsState();
}
}
}
if (drawBorder) {
int start = run.start;
for (int k = j; k > 0 && style.isAdherentBorder(styles[k - 1].style); k--) {
start = styles[k - 1].start;
}
start = translateOffset(start);
if (!(start > lineEnd || end < lineStart)) {
range.location = Math.max(lineStart, start);
range.length = Math.min(lineEnd, end) + 1 - range.location;
if (range.length > 0) {
int /*long*/ [] rectCount = new int /*long*/ [1];
int /*long*/ pArray = layoutManager.rectArrayForCharacterRange(range, range, textContainer, rectCount);
NSRect rect = new NSRect();
gc.handle.saveGraphicsState();
float /*double*/ [] color = null;
if (style.borderColor != null) color = style.borderColor.handle;
if (color == null && style.foreground != null) color = style.foreground.handle;
if (color != null) {
NSColor.colorWithDeviceRed(color[0], color[1], color[2], color[3]).setStroke();
}
int width = 1;
float[] dashes = null;
switch (style.borderStyle) {
case SWT.BORDER_SOLID: break;
case SWT.BORDER_DASH: dashes = width != 0 ? GC.LINE_DASH : GC.LINE_DASH_ZERO; break;
case SWT.BORDER_DOT: dashes = width != 0 ? GC.LINE_DOT : GC.LINE_DOT_ZERO; break;
}
float /*double*/ [] lengths = null;
if (dashes != null) {
lengths = new float /*double*/[dashes.length];
for (int k = 0; k < lengths.length; k++) {
lengths[k] = width == 0 ? dashes[k] : dashes[k] * width;
}
}
for (int k = 0; k < rectCount[0]; k++, pArray += NSRect.sizeof) {
OS.memmove(rect, pArray, NSRect.sizeof);
fixRect(rect);
rect.x += pt.x + 0.5f;
rect.y += pt.y + 0.5f;
rect.width -= 0.5f;
rect.height -= 0.5f;
NSBezierPath path = NSBezierPath.bezierPath();
path.setLineDash(lengths, lengths != null ? lengths.length : 0, 0);
path.appendBezierPathWithRect(rect);
path.stroke();
}
gc.handle.restoreGraphicsState();
}
}
}
}
}
}
gc.handle.restoreGraphicsState();
} finally {
gc.uncheckGC(pool);
}
}
void fixRect(NSRect rect) {
for (int j = 0; j < lineBounds.length; j++) {
NSRect line = lineBounds[j];
if (line.y <= rect.y && rect.y < line.y + line.height) {
if (rect.x + rect.width > line.x + line.width) {
rect.width = line.x + line.width - rect.x;
}
}
}
}
void freeRuns() {
lineBounds = null;
lineOffsets = null;
for (int i = 0; i < stylesCount - 1; i++) {
StyleItem run = styles[i];
if (run.cell != null) {
OS.object_setInstanceVariable(run.cell.id, SWT_OBJECT, 0);
run.cell.release();
run.cell = null;
OS.DeleteGlobalRef(run.jniRef);
run.jniRef = 0;
}
}
}
/**
* Returns the receiver's horizontal text alignment, which will be one
* of <code>SWT.LEFT</code>, <code>SWT.CENTER</code> or
* <code>SWT.RIGHT</code>.
*
* @return the alignment used to positioned text horizontally
*
* @exception SWTException <ul>
* <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li>
* </ul>
*/
public int getAlignment() {
checkLayout();
return alignment;
}
/**
* Returns the ascent of the receiver.
*
* @return the ascent
*
* @exception SWTException <ul>
* <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li>
* </ul>
*
* @see #getDescent()
* @see #setDescent(int)
* @see #setAscent(int)
* @see #getLineMetrics(int)
*/
public int getAscent () {
checkLayout();
return ascent;
}
/**
* Returns the bounds of the receiver. The width returned is either the
* width of the longest line or the width set using {@link TextLayout#setWidth(int)}.
* To obtain the text bounds of a line use {@link TextLayout#getLineBounds(int)}.
*
* @return the bounds of the receiver
*
* @exception SWTException <ul>
* <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li>
* </ul>
*
* @see #setWidth(int)
* @see #getLineBounds(int)
*/
public Rectangle getBounds() {
checkLayout();
NSAutoreleasePool pool = null;
if (!NSThread.isMainThread()) pool = (NSAutoreleasePool) new NSAutoreleasePool().alloc().init();
try {
computeRuns();
NSRect rect = layoutManager.usedRectForTextContainer(textContainer);
if (wrapWidth != -1) rect.width = wrapWidth;
if (text.length() == 0) {
Font font = this.font != null ? this.font : device.systemFont;
NSFont nsFont = font.handle;
rect.height = layoutManager.defaultLineHeightForFont(nsFont);
}
rect.height = Math.max(rect.height, ascent + descent) + spacing;
return new Rectangle(0, 0, (int)Math.ceil(rect.width), (int)Math.ceil(rect.height));
} finally {
if (pool != null) pool.release();
}
}
/**
* Returns the bounds for the specified range of characters. The
* bounds is the smallest rectangle that encompasses all characters
* in the range. The start and end offsets are inclusive and will be
* clamped if out of range.
*
* @param start the start offset
* @param end the end offset
* @return the bounds of the character range
*
* @exception SWTException <ul>
* <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li>
* </ul>
*/
public Rectangle getBounds(int start, int end) {
checkLayout();
NSAutoreleasePool pool = null;
if (!NSThread.isMainThread()) pool = (NSAutoreleasePool) new NSAutoreleasePool().alloc().init();
try {
computeRuns();
int length = text.length();
if (length == 0) return new Rectangle(0, 0, 0, 0);
if (start > end) return new Rectangle(0, 0, 0, 0);
start = Math.min(Math.max(0, start), length - 1);
end = Math.min(Math.max(0, end), length - 1);
start = translateOffset(start);
end = translateOffset(end);
NSRange range = new NSRange();
range.location = start;
range.length = end - start + 1;
int /*long*/ [] rectCount = new int /*long*/ [1];
int /*long*/ pArray = layoutManager.rectArrayForCharacterRange(range, range, textContainer, rectCount);
NSRect rect = new NSRect();
int left = 0x7FFFFFFF, right = 0;
int top = 0x7FFFFFFF, bottom = 0;
for (int i = 0; i < rectCount[0]; i++, pArray += NSRect.sizeof) {
OS.memmove(rect, pArray, NSRect.sizeof);
fixRect(rect);
left = Math.min(left, (int)rect.x);
right = Math.max(right, (int)Math.ceil(rect.x + rect.width));
top = Math.min(top, (int)rect.y);
bottom = Math.max(bottom, (int)Math.ceil(rect.y + rect.height));
}
return new Rectangle(left, top, right - left, bottom - top);
} finally {
if (pool != null) pool.release();
}
}
/**
* Returns the descent of the receiver.
*
* @return the descent
*
* @exception SWTException <ul>
* <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li>
* </ul>
*
* @see #getAscent()
* @see #setAscent(int)
* @see #setDescent(int)
* @see #getLineMetrics(int)
*/
public int getDescent () {
checkLayout();
return descent;
}
/**
* Returns the default font currently being used by the receiver
* to draw and measure text.
*
* @return the receiver's font
*
* @exception SWTException <ul>
* <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li>
* </ul>
*/
public Font getFont () {
checkLayout();
return font;
}
/**
* Returns the receiver's indent.
*
* @return the receiver's indent
*
* @exception SWTException <ul>
* <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li>
* </ul>
*
* @since 3.2
*/
public int getIndent () {
checkLayout();
return indent;
}
/**
* Returns the receiver's justification.
*
* @return the receiver's justification
*
* @exception SWTException <ul>
* <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li>
* </ul>
*
* @since 3.2
*/
public boolean getJustify () {
checkLayout();
return justify;
}
/**
* Returns the embedding level for the specified character offset. The
* embedding level is usually used to determine the directionality of a
* character in bidirectional text.
*
* @param offset the character offset
* @return the embedding level
*
* @exception IllegalArgumentException <ul>
* <li>ERROR_INVALID_ARGUMENT - if the character offset is out of range</li>
* </ul>
* @exception SWTException <ul>
* <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li>
*/
public int getLevel(int offset) {
checkLayout();
NSAutoreleasePool pool = null;
if (!NSThread.isMainThread()) pool = (NSAutoreleasePool) new NSAutoreleasePool().alloc().init();
try {
computeRuns();
int length = text.length();
if (!(0 <= offset && offset <= length)) SWT.error(SWT.ERROR_INVALID_RANGE);
offset = translateOffset(offset);
int /*long*/ glyphOffset = layoutManager.glyphIndexForCharacterAtIndex(offset);
NSRange range = new NSRange();
range.location = glyphOffset;
range.length = 1;
byte[] bidiLevels = new byte[1];
layoutManager.getGlyphsInRange(range, 0, 0, 0, 0, bidiLevels);
return bidiLevels[0];
} finally {
if (pool != null) pool.release();
}
}
/**
* Returns the line offsets. Each value in the array is the
* offset for the first character in a line except for the last
* value, which contains the length of the text.
*
* @return the line offsets
*
* @exception SWTException <ul>
* <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li>
* </ul>
*/
public int[] getLineOffsets() {
checkLayout ();
NSAutoreleasePool pool = null;
if (!NSThread.isMainThread()) pool = (NSAutoreleasePool) new NSAutoreleasePool().alloc().init();
try {
computeRuns();
int[] offsets = new int[lineOffsets.length];
for (int i = 0; i < offsets.length; i++) {
offsets[i] = untranslateOffset(lineOffsets[i]);
}
return offsets;
} finally {
if (pool != null) pool.release();
}
}
/**
* Returns the index of the line that contains the specified
* character offset.
*
* @param offset the character offset
* @return the line index
*
* @exception IllegalArgumentException <ul>
* <li>ERROR_INVALID_ARGUMENT - if the character offset is out of range</li>
* </ul>
* @exception SWTException <ul>
* <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li>
* </ul>
*/
public int getLineIndex(int offset) {
checkLayout ();
NSAutoreleasePool pool = null;
if (!NSThread.isMainThread()) pool = (NSAutoreleasePool) new NSAutoreleasePool().alloc().init();
try {
computeRuns();
int length = text.length();
if (!(0 <= offset && offset <= length)) SWT.error(SWT.ERROR_INVALID_RANGE);
offset = translateOffset(offset);
for (int line=0; line<lineOffsets.length - 1; line++) {
if (lineOffsets[line + 1] > offset) {
return line;
}
}
return lineBounds.length - 1;
} finally {
if (pool != null) pool.release();
}
}
/**
* Returns the bounds of the line for the specified line index.
*
* @param lineIndex the line index
* @return the line bounds
*
* @exception IllegalArgumentException <ul>
* <li>ERROR_INVALID_ARGUMENT - if the line index is out of range</li>
* </ul>
* @exception SWTException <ul>
* <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li>
* </ul>
*/
public Rectangle getLineBounds(int lineIndex) {
checkLayout();
NSAutoreleasePool pool = null;
if (!NSThread.isMainThread()) pool = (NSAutoreleasePool) new NSAutoreleasePool().alloc().init();
try {
computeRuns();
if (!(0 <= lineIndex && lineIndex < lineBounds.length)) SWT.error(SWT.ERROR_INVALID_RANGE);
NSRect rect = lineBounds[lineIndex];
int height = Math.max((int)Math.ceil(rect.height), ascent + descent);
return new Rectangle((int)rect.x, (int)rect.y, (int)Math.ceil(rect.width), height);
} finally {
if (pool != null) pool.release();
}
}
/**
* Returns the receiver's line count. This includes lines caused
* by wrapping.
*
* @return the line count
*
* @exception SWTException <ul>
* <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li>
* </ul>
*/
public int getLineCount() {
checkLayout ();
NSAutoreleasePool pool = null;
if (!NSThread.isMainThread()) pool = (NSAutoreleasePool) new NSAutoreleasePool().alloc().init();
try {
computeRuns();
return lineOffsets.length - 1;
} finally {
if (pool != null) pool.release();
}
}
/**
* Returns the font metrics for the specified line index.
*
* @param lineIndex the line index
* @return the font metrics
*
* @exception IllegalArgumentException <ul>
* <li>ERROR_INVALID_ARGUMENT - if the line index is out of range</li>
* </ul>
* @exception SWTException <ul>
* <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li>
* </ul>
*/
public FontMetrics getLineMetrics (int lineIndex) {
checkLayout ();
NSAutoreleasePool pool = null;
if (!NSThread.isMainThread()) pool = (NSAutoreleasePool) new NSAutoreleasePool().alloc().init();
try {
computeRuns();
int lineCount = getLineCount();
if (!(0 <= lineIndex && lineIndex < lineCount)) SWT.error(SWT.ERROR_INVALID_RANGE);
int length = text.length();
if (length == 0) {
Font font = this.font != null ? this.font : device.systemFont;
int ascent = (int)layoutManager.defaultBaselineOffsetForFont(font.handle);
int descent = (int)layoutManager.defaultLineHeightForFont(font.handle) - ascent;
ascent = Math.max(ascent, this.ascent);
descent = Math.max(descent, this.descent);
return FontMetrics.cocoa_new(ascent, descent, 0, 0, ascent + descent);
}
Rectangle rect = getLineBounds(lineIndex);
int baseline = (int)layoutManager.typesetter().baselineOffsetInLayoutManager(layoutManager, getLineOffsets()[lineIndex]);
return FontMetrics.cocoa_new(rect.height - baseline, baseline, 0, 0, rect.height);
} finally {
if (pool != null) pool.release();
}
}
/**
* Returns the location for the specified character offset. The
* <code>trailing</code> argument indicates whether the offset
* corresponds to the leading or trailing edge of the cluster.
*
* @param offset the character offset
* @param trailing the trailing flag
* @return the location of the character offset
*
* @exception SWTException <ul>
* <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li>
* </ul>
*
* @see #getOffset(Point, int[])
* @see #getOffset(int, int, int[])
*/
public Point getLocation(int offset, boolean trailing) {
checkLayout();
NSAutoreleasePool pool = null;
if (!NSThread.isMainThread()) pool = (NSAutoreleasePool) new NSAutoreleasePool().alloc().init();
try {
computeRuns();
int length = text.length();
if (!(0 <= offset && offset <= length)) SWT.error(SWT.ERROR_INVALID_RANGE);
if (length == 0) return new Point(0, 0);
offset = translateOffset(offset);
int /*long*/ glyphIndex = layoutManager.glyphIndexForCharacterAtIndex(offset);
NSRect rect = layoutManager.lineFragmentUsedRectForGlyphAtIndex(glyphIndex, 0);
NSPoint point = layoutManager.locationForGlyphAtIndex(glyphIndex);
boolean rtl = false;
NSRange range = new NSRange();
range.location = glyphIndex;
range.length = 1;
byte[] bidiLevels = new byte[1];
int /*long*/ result = layoutManager.getGlyphsInRange(range, 0, 0, 0, 0, bidiLevels);
if (result > 0) {
rtl = (bidiLevels[0] & 1) != 0;
}
if (trailing != rtl) {
int /*long*/ [] rectCount = new int /*long*/ [1];
int /*long*/ pArray = layoutManager.rectArrayForGlyphRange(range, range, textContainer, rectCount);
if (rectCount[0] > 0) {
NSRect bounds = new NSRect();
OS.memmove(bounds, pArray, NSRect.sizeof);
fixRect(bounds);
point.x += bounds.width;
}
}
return new Point((int)point.x, (int)rect.y);
} finally {
if (pool != null) pool.release();
}
}
/**
* Returns the next offset for the specified offset and movement
* type. The movement is one of <code>SWT.MOVEMENT_CHAR</code>,
* <code>SWT.MOVEMENT_CLUSTER</code>, <code>SWT.MOVEMENT_WORD</code>,
* <code>SWT.MOVEMENT_WORD_END</code> or <code>SWT.MOVEMENT_WORD_START</code>.
*
* @param offset the start offset
* @param movement the movement type
* @return the next offset
*
* @exception IllegalArgumentException <ul>
* <li>ERROR_INVALID_ARGUMENT - if the offset is out of range</li>
* </ul>
* @exception SWTException <ul>
* <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li>
* </ul>
*
* @see #getPreviousOffset(int, int)
*/
public int getNextOffset (int offset, int movement) {
NSAutoreleasePool pool = null;
if (!NSThread.isMainThread()) pool = (NSAutoreleasePool) new NSAutoreleasePool().alloc().init();
try {
return _getOffset(offset, movement, true);
} finally {
if (pool != null) pool.release();
}
}
int _getOffset (int offset, int movement, boolean forward) {
checkLayout();
computeRuns();
int length = text.length();
if (!(0 <= offset && offset <= length)) SWT.error(SWT.ERROR_INVALID_RANGE);
if (length == 0) return 0;
switch (movement) {
case SWT.MOVEMENT_CLUSTER://TODO cluster
case SWT.MOVEMENT_CHAR: {
if (forward) {
if (offset < length) offset++;
} else {
if (offset > 0) offset--;
}
return offset;
}
case SWT.MOVEMENT_WORD: {
offset = translateOffset(offset);
offset = (int)/*64*/textStorage.nextWordFromIndex(offset, forward);
return untranslateOffset(offset);
}
case SWT.MOVEMENT_WORD_END: {
offset = translateOffset(offset);
if (forward) {
offset = (int)/*64*/textStorage.nextWordFromIndex(offset, true);
} else {
length = translateOffset(length);
int result = 0;
while (result < length) {
int wordEnd = (int)/*64*/textStorage.nextWordFromIndex(result, true);
if (wordEnd >= offset) {
offset = result;
break;
}
result = wordEnd;
}
}
return untranslateOffset(offset);
}
case SWT.MOVEMENT_WORD_START: {
offset = translateOffset(offset);
if (forward) {
int result = translateOffset(length);
while (result > 0) {
int wordStart = (int)/*64*/textStorage.nextWordFromIndex(result, false);
if (wordStart <= offset) {
offset = result;
break;
}
result = wordStart;
}
} else {
offset = (int)/*64*/textStorage.nextWordFromIndex(offset, false);
}
return untranslateOffset(offset);
}
}
return offset;
}
/**
* Returns the character offset for the specified point.
* For a typical character, the trailing argument will be filled in to
* indicate whether the point is closer to the leading edge (0) or
* the trailing edge (1). When the point is over a cluster composed
* of multiple characters, the trailing argument will be filled with the
* position of the character in the cluster that is closest to
* the point.
*
* @param point the point
* @param trailing the trailing buffer
* @return the character offset
*
* @exception IllegalArgumentException <ul>
* <li>ERROR_INVALID_ARGUMENT - if the trailing length is less than <code>1</code></li>
* <li>ERROR_NULL_ARGUMENT - if the point is null</li>
* </ul>
* @exception SWTException <ul>
* <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li>
* </ul>
*
* @see #getLocation(int, boolean)
*/
public int getOffset(Point point, int[] trailing) {
checkLayout();
if (point == null) SWT.error(SWT.ERROR_NULL_ARGUMENT);
return getOffset(point.x, point.y, trailing);
}
/**
* Returns the character offset for the specified point.
* For a typical character, the trailing argument will be filled in to
* indicate whether the point is closer to the leading edge (0) or
* the trailing edge (1). When the point is over a cluster composed
* of multiple characters, the trailing argument will be filled with the
* position of the character in the cluster that is closest to
* the point.
*
* @param x the x coordinate of the point
* @param y the y coordinate of the point
* @param trailing the trailing buffer
* @return the character offset
*
* @exception IllegalArgumentException <ul>
* <li>ERROR_INVALID_ARGUMENT - if the trailing length is less than <code>1</code></li>
* </ul>
* @exception SWTException <ul>
* <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li>
* </ul>
*
* @see #getLocation(int, boolean)
*/
public int getOffset(int x, int y, int[] trailing) {
checkLayout();
NSAutoreleasePool pool = null;
if (!NSThread.isMainThread()) pool = (NSAutoreleasePool) new NSAutoreleasePool().alloc().init();
try {
computeRuns();
if (trailing != null && trailing.length < 1) SWT.error(SWT.ERROR_INVALID_ARGUMENT);
int length = text.length();
if (length == 0) return 0;
NSPoint pt = new NSPoint();
pt.x = x;
pt.y = y;
float /*double*/[] partialFration = new float /*double*/[1];
int /*long*/ glyphIndex = layoutManager.glyphIndexForPoint(pt, textContainer, partialFration);
int /*long*/ offset = layoutManager.characterIndexForGlyphAtIndex(glyphIndex);
if (trailing != null) trailing[0] = Math.round((float)/*64*/partialFration[0]);
return Math.min(untranslateOffset((int)/*64*/offset), length - 1);
} finally {
if (pool != null) pool.release();
}
}
/**
* Returns the orientation of the receiver.
*
* @return the orientation style
*
* @exception SWTException <ul>
* <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li>
* </ul>
*/
public int getOrientation() {
checkLayout();
return orientation;
}
/**
* Returns the previous offset for the specified offset and movement
* type. The movement is one of <code>SWT.MOVEMENT_CHAR</code>,
* <code>SWT.MOVEMENT_CLUSTER</code> or <code>SWT.MOVEMENT_WORD</code>,
* <code>SWT.MOVEMENT_WORD_END</code> or <code>SWT.MOVEMENT_WORD_START</code>.
*
* @param offset the start offset
* @param movement the movement type
* @return the previous offset
*
* @exception IllegalArgumentException <ul>
* <li>ERROR_INVALID_ARGUMENT - if the offset is out of range</li>
* </ul>
* @exception SWTException <ul>
* <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li>
* </ul>
*
* @see #getNextOffset(int, int)
*/
public int getPreviousOffset (int index, int movement) {
NSAutoreleasePool pool = null;
if (!NSThread.isMainThread()) pool = (NSAutoreleasePool) new NSAutoreleasePool().alloc().init();
try {
return _getOffset(index, movement, false);
} finally {
if (pool != null) pool.release();
}
}
/**
* Gets the ranges of text that are associated with a <code>TextStyle</code>.
*
* @return the ranges, an array of offsets representing the start and end of each
* text style.
*
* @exception SWTException <ul>
* <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li>
* </ul>
*
* @see #getStyles()
*
* @since 3.2
*/
public int[] getRanges () {
checkLayout();
int[] result = new int[stylesCount * 2];
int count = 0;
for (int i=0; i<stylesCount - 1; i++) {
if (styles[i].style != null) {
result[count++] = styles[i].start;
result[count++] = styles[i + 1].start - 1;
}
}
if (count != result.length) {
int[] newResult = new int[count];
System.arraycopy(result, 0, newResult, 0, count);
result = newResult;
}
return result;
}
/**
* Returns the text segments offsets of the receiver.
*
* @return the text segments offsets
*
* @exception SWTException <ul>
* <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li>
* </ul>
*/
public int[] getSegments() {
checkLayout();
return segments;
}
/**
* Returns the segments characters of the receiver.
*
* @return the segments characters
*
* @exception SWTException <ul>
* <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li>
* </ul>
*
* @since 3.6
*/
public char[] getSegmentsChars () {
checkLayout();
return segmentsChars;
}
String getSegmentsText() {
int length = text.length();
if (length == 0) return text;
if (segments == null) return text;
int nSegments = segments.length;
if (nSegments == 0) return text;
if (segmentsChars == null) {
if (nSegments == 1) return text;
if (nSegments == 2) {
if (segments[0] == 0 && segments[1] == length) return text;
}
}
char[] oldChars = new char[length];
text.getChars(0, length, oldChars, 0);
char[] newChars = new char[length + nSegments];
int charCount = 0, segmentCount = 0;
char defaultSeparator = orientation == SWT.RIGHT_TO_LEFT ? RTL_MARK : LTR_MARK;
while (charCount < length) {
if (segmentCount < nSegments && charCount == segments[segmentCount]) {
char separator = segmentsChars != null && segmentsChars.length > segmentCount ? segmentsChars[segmentCount] : defaultSeparator;
newChars[charCount + segmentCount++] = separator;
} else {
newChars[charCount + segmentCount] = oldChars[charCount++];
}
}
while (segmentCount < nSegments) {
segments[segmentCount] = charCount;
char separator = segmentsChars != null && segmentsChars.length > segmentCount ? segmentsChars[segmentCount] : defaultSeparator;
newChars[charCount + segmentCount++] = separator;
}
return new String(newChars, 0, newChars.length);
}
/**
* Returns the line spacing of the receiver.
*
* @return the line spacing
*
* @exception SWTException <ul>
* <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li>
* </ul>
*/
public int getSpacing () {
checkLayout();
return spacing;
}
/**
* Gets the style of the receiver at the specified character offset.
*
* @param offset the text offset
* @return the style or <code>null</code> if not set
*
* @exception IllegalArgumentException <ul>
* <li>ERROR_INVALID_ARGUMENT - if the character offset is out of range</li>
* </ul>
* @exception SWTException <ul>
* <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li>
* </ul>
*/
public TextStyle getStyle (int offset) {
checkLayout();
int length = text.length();
if (!(0 <= offset && offset < length)) SWT.error(SWT.ERROR_INVALID_RANGE);
for (int i=1; i<stylesCount; i++) {
StyleItem item = styles[i];
if (item.start > offset) {
return styles[i - 1].style;
}
}
return null;
}
/**
* Gets all styles of the receiver.
*
* @return the styles
*
* @exception SWTException <ul>
* <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li>
* </ul>
*
* @see #getRanges()
*
* @since 3.2
*/
public TextStyle[] getStyles () {
checkLayout();
TextStyle[] result = new TextStyle[stylesCount];
int count = 0;
for (int i=0; i<stylesCount; i++) {
if (styles[i].style != null) {
result[count++] = styles[i].style;
}
}
if (count != result.length) {
TextStyle[] newResult = new TextStyle[count];
System.arraycopy(result, 0, newResult, 0, count);
result = newResult;
}
return result;
}
/**
* Returns the tab list of the receiver.
*
* @return the tab list
*
* @exception SWTException <ul>
* <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li>
* </ul>
*/
public int[] getTabs() {
checkLayout();
return tabs;
}
/**
* Gets the receiver's text, which will be an empty
* string if it has never been set.
*
* @return the receiver's text
*
* @exception SWTException <ul>
* <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li>
* </ul>
*/
public String getText () {
checkLayout ();
return text;
}
/**
* Returns the width of the receiver.
*
* @return the width
*
* @exception SWTException <ul>
* <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li>
* </ul>
*/
public int getWidth () {
checkLayout();
return wrapWidth;
}
/**
* Returns the receiver's wrap indent.
*
* @return the receiver's wrap indent
*
* @exception SWTException <ul>
* <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li>
* </ul>
*
* @since 3.6
*/
public int getWrapIndent () {
checkLayout();
return wrapIndent;
}
void initClasses () {
String className = "SWTTextAttachmentCell";
if (OS.objc_lookUpClass(className) != 0) return;
textLayoutCallback2 = new Callback(getClass(), "textLayoutProc", 2);
int /*long*/ proc2 = textLayoutCallback2.getAddress();
if (proc2 == 0) SWT.error(SWT.ERROR_NO_MORE_CALLBACKS);
int /*long*/ cellBaselineOffsetProc = OS.CALLBACK_cellBaselineOffset(proc2);
int /*long*/ cellSizeProc = OS.CALLBACK_NSTextAttachmentCell_cellSize(proc2);
byte[] types = {'*','\0'};
int size = C.PTR_SIZEOF, align = C.PTR_SIZEOF == 4 ? 2 : 3;
int /*long*/ cls = OS.objc_allocateClassPair(OS.class_NSCell, className, 0);
OS.class_addIvar(cls, SWT_OBJECT, size, (byte)align, types);
OS.class_addProtocol(cls, OS.protocol_NSTextAttachmentCell);
OS.class_addMethod(cls, OS.sel_cellSize, cellSizeProc, "@:");
OS.class_addMethod(cls, OS.sel_cellBaselineOffset, cellBaselineOffsetProc, "@:");
OS.objc_registerClassPair(cls);
}
/**
* Returns <code>true</code> if the text layout has been disposed,
* and <code>false</code> otherwise.
* <p>
* This method gets the dispose state for the text layout.
* When a text layout has been disposed, it is an error to
* invoke any other method (except {@link #dispose()}) using the text layout.
* </p>
*
* @return <code>true</code> when the text layout is disposed and <code>false</code> otherwise
*/
public boolean isDisposed () {
return device == null;
}
/*
* Returns true if the underline style is supported natively
*/
boolean isUnderlineSupported (TextStyle style) {
if (style != null && style.underline) {
int uStyle = style.underlineStyle;
return uStyle == SWT.UNDERLINE_SINGLE || uStyle == SWT.UNDERLINE_DOUBLE || uStyle == SWT.UNDERLINE_LINK || uStyle == UNDERLINE_THICK;
}
return false;
}
/**
* Sets the text alignment for the receiver. The alignment controls
* how a line of text is positioned horizontally. The argument should
* be one of <code>SWT.LEFT</code>, <code>SWT.RIGHT</code> or <code>SWT.CENTER</code>.
* <p>
* The default alignment is <code>SWT.LEFT</code>. Note that the receiver's
* width must be set in order to use <code>SWT.RIGHT</code> or <code>SWT.CENTER</code>
* alignment.
* </p>
*
* @param alignment the new alignment
*
* @exception SWTException <ul>
* <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li>
* </ul>
*
* @see #setWidth(int)
*/
public void setAlignment (int alignment) {
checkLayout();
int mask = SWT.LEFT | SWT.CENTER | SWT.RIGHT;
alignment &= mask;
if (alignment == 0) return;
if ((alignment & SWT.LEFT) != 0) alignment = SWT.LEFT;
if ((alignment & SWT.RIGHT) != 0) alignment = SWT.RIGHT;
if (this.alignment == alignment) return;
NSAutoreleasePool pool = null;
if (!NSThread.isMainThread()) pool = (NSAutoreleasePool) new NSAutoreleasePool().alloc().init();
try {
freeRuns();
this.alignment = alignment;
} finally {
if (pool != null) pool.release();
}
}
/**
* Sets the ascent of the receiver. The ascent is distance in pixels
* from the baseline to the top of the line and it is applied to all
* lines. The default value is <code>-1</code> which means that the
* ascent is calculated from the line fonts.
*
* @param ascent the new ascent
*
* @exception IllegalArgumentException <ul>
* <li>ERROR_INVALID_ARGUMENT - if the ascent is less than <code>-1</code></li>
* </ul>
* @exception SWTException <ul>
* <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li>
* </ul>
*
* @see #setDescent(int)
* @see #getLineMetrics(int)
*/
public void setAscent (int ascent) {
checkLayout ();
if (ascent < -1) SWT.error(SWT.ERROR_INVALID_ARGUMENT);
if (this.ascent == ascent) return;
NSAutoreleasePool pool = null;
if (!NSThread.isMainThread()) pool = (NSAutoreleasePool) new NSAutoreleasePool().alloc().init();
try {
freeRuns();
this.ascent = ascent;
} finally {
if (pool != null) pool.release();
}
}
/**
* Sets the descent of the receiver. The descent is distance in pixels
* from the baseline to the bottom of the line and it is applied to all
* lines. The default value is <code>-1</code> which means that the
* descent is calculated from the line fonts.
*
* @param descent the new descent
*
* @exception IllegalArgumentException <ul>
* <li>ERROR_INVALID_ARGUMENT - if the descent is less than <code>-1</code></li>
* </ul>
* @exception SWTException <ul>
* <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li>
* </ul>
*
* @see #setAscent(int)
* @see #getLineMetrics(int)
*/
public void setDescent (int descent) {
checkLayout ();
if (descent < -1) SWT.error(SWT.ERROR_INVALID_ARGUMENT);
if (this.descent == descent) return;
NSAutoreleasePool pool = null;
if (!NSThread.isMainThread()) pool = (NSAutoreleasePool) new NSAutoreleasePool().alloc().init();
try {
freeRuns();
this.descent = descent;
} finally {
if (pool != null) pool.release();
}
}
/**
* Sets the default font which will be used by the receiver
* to draw and measure text. If the
* argument is null, then a default font appropriate
* for the platform will be used instead. Note that a text
* style can override the default font.
*
* @param font the new font for the receiver, or null to indicate a default font
*
* @exception IllegalArgumentException <ul>
* <li>ERROR_INVALID_ARGUMENT - if the font has been disposed</li>
* </ul>
* @exception SWTException <ul>
* <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li>
* </ul>
*/
public void setFont (Font font) {
checkLayout ();
if (font != null && font.isDisposed()) SWT.error(SWT.ERROR_INVALID_ARGUMENT);
Font oldFont = this.font;
if (oldFont == font) return;
this.font = font;
if (oldFont != null && oldFont.equals(font)) return;
NSAutoreleasePool pool = null;
if (!NSThread.isMainThread()) pool = (NSAutoreleasePool) new NSAutoreleasePool().alloc().init();
try {
freeRuns();
} finally {
if (pool != null) pool.release();
}
}
/**
* Sets the indent of the receiver. This indent is applied to the first line of
* each paragraph.
*
* @param indent new indent
*
* @exception SWTException <ul>
* <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li>
* </ul>
*
* @see #setWrapIndent(int)
*
* @since 3.2
*/
public void setIndent (int indent) {
checkLayout ();
if (indent < 0) return;
if (this.indent == indent) return;
NSAutoreleasePool pool = null;
if (!NSThread.isMainThread()) pool = (NSAutoreleasePool) new NSAutoreleasePool().alloc().init();
try {
freeRuns();
this.indent = indent;
} finally {
if (pool != null) pool.release();
}
}
/**
* Sets the wrap indent of the receiver. This indent is applied to all lines
* in the paragraph except the first line.
*
* @param wrapIndent new wrap indent
*
* @exception SWTException <ul>
* <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li>
* </ul>
*
* @see #setIndent(int)
*
* @since 3.6
*/
public void setWrapIndent (int wrapIndent) {
checkLayout ();
if (wrapIndent < 0) return;
if (this.wrapIndent == wrapIndent) return;
NSAutoreleasePool pool = null;
if (!NSThread.isMainThread()) pool = (NSAutoreleasePool) new NSAutoreleasePool().alloc().init();
try {
freeRuns();
this.wrapIndent = wrapIndent;
} finally {
if (pool != null) pool.release();
}
}
/**
* Sets the justification of the receiver. Note that the receiver's
* width must be set in order to use justification.
*
* @param justify new justify
*
* @exception SWTException <ul>
* <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li>
* </ul>
*
* @since 3.2
*/
public void setJustify (boolean justify) {
checkLayout ();
if (justify == this.justify) return;
NSAutoreleasePool pool = null;
if (!NSThread.isMainThread()) pool = (NSAutoreleasePool) new NSAutoreleasePool().alloc().init();
try {
freeRuns();
this.justify = justify;
} finally {
if (pool != null) pool.release();
}
}
/**
* Sets the orientation of the receiver, which must be one
* of <code>SWT.LEFT_TO_RIGHT</code> or <code>SWT.RIGHT_TO_LEFT</code>.
*
* @param orientation new orientation style
*
* @exception SWTException <ul>
* <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li>
* </ul>
*/
public void setOrientation(int orientation) {
checkLayout();
int mask = SWT.LEFT_TO_RIGHT | SWT.RIGHT_TO_LEFT;
orientation &= mask;
if (orientation == 0) return;
if ((orientation & SWT.LEFT_TO_RIGHT) != 0) orientation = SWT.LEFT_TO_RIGHT;
if (this.orientation == orientation) return;
this.orientation = orientation;
NSAutoreleasePool pool = null;
if (!NSThread.isMainThread()) pool = (NSAutoreleasePool) new NSAutoreleasePool().alloc().init();
try {
freeRuns();
} finally {
if (pool != null) pool.release();
}
}
/**
* Sets the offsets of the receiver's text segments. Text segments are used to
* override the default behavior of the bidirectional algorithm.
* Bidirectional reordering can happen within a text segment but not
* between two adjacent segments.
* <p>
* Each text segment is determined by two consecutive offsets in the
* <code>segments</code> arrays. The first element of the array should
* always be zero and the last one should always be equals to length of
* the text.
* </p>
* <p>
* When segments characters are set, the segments are the offsets where
* the characters are inserted in the text.
* <p>
*
* @param segments the text segments offset
*
* @exception SWTException <ul>
* <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li>
* </ul>
*
* @see #setSegmentsChars(char[])
*/
public void setSegments(int[] segments) {
checkLayout();
if (this.segments == null && segments == null) return;
if (this.segments != null && segments !=null) {
if (this.segments.length == segments.length) {
int i;
for (i = 0; i <segments.length; i++) {
if (this.segments[i] != segments[i]) break;
}
if (i == segments.length) return;
}
}
NSAutoreleasePool pool = null;
if (!NSThread.isMainThread()) pool = (NSAutoreleasePool) new NSAutoreleasePool().alloc().init();
try {
freeRuns();
this.segments = segments;
} finally {
if (pool != null) pool.release();
}
}
/**
* Sets the characters to be used in the segments boundaries. The segments
* are set by calling <code>setSegments(int[])</code>. The application can
* use this API to insert Unicode Control Characters in the text to control
* the display of the text and bidi reordering. The characters are not
* accessible by any other API in <code>TextLayout</code>.
*
* @param segmentsChars the segments characters
*
* @exception SWTException <ul>
* <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li>
* </ul>
*
* @see #setSegments(int[])
*
* @since 3.6
*/
public void setSegmentsChars(char[] segmentsChars) {
checkLayout();
if (this.segmentsChars == null && segmentsChars == null) return;
if (this.segmentsChars != null && segmentsChars != null) {
if (this.segmentsChars.length == segmentsChars.length) {
int i;
for (i = 0; i <segmentsChars.length; i++) {
if (this.segmentsChars[i] != segmentsChars[i]) break;
}
if (i == segmentsChars.length) return;
}
}
NSAutoreleasePool pool = null;
if (!NSThread.isMainThread()) pool = (NSAutoreleasePool) new NSAutoreleasePool().alloc().init();
try {
freeRuns();
this.segmentsChars = segmentsChars;
} finally {
if (pool != null) pool.release();
}
}
/**
* Sets the line spacing of the receiver. The line spacing
* is the space left between lines.
*
* @param spacing the new line spacing
*
* @exception IllegalArgumentException <ul>
* <li>ERROR_INVALID_ARGUMENT - if the spacing is negative</li>
* </ul>
* @exception SWTException <ul>
* <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li>
* </ul>
*/
public void setSpacing (int spacing) {
checkLayout();
if (spacing < 0) SWT.error(SWT.ERROR_INVALID_ARGUMENT);
if (this.spacing == spacing) return;
NSAutoreleasePool pool = null;
if (!NSThread.isMainThread()) pool = (NSAutoreleasePool) new NSAutoreleasePool().alloc().init();
try {
freeRuns();
this.spacing = spacing;
} finally {
if (pool != null) pool.release();
}
}
/**
* Sets the style of the receiver for the specified range. Styles previously
* set for that range will be overwritten. The start and end offsets are
* inclusive and will be clamped if out of range.
*
* @param style the style
* @param start the start offset
* @param end the end offset
*
* @exception SWTException <ul>
* <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li>
* </ul>
*/
public void setStyle (TextStyle style, int start, int end) {
checkLayout();
NSAutoreleasePool pool = null;
if (!NSThread.isMainThread()) pool = (NSAutoreleasePool) new NSAutoreleasePool().alloc().init();
try {
int length = text.length();
if (length == 0) return;
if (start > end) return;
start = Math.min(Math.max(0, start), length - 1);
end = Math.min(Math.max(0, end), length - 1);
int low = -1;
int high = stylesCount;
while (high - low > 1) {
int index = (high + low) / 2;
if (styles[index + 1].start > start) {
high = index;
} else {
low = index;
}
}
if (0 <= high && high < stylesCount) {
StyleItem item = styles[high];
if (item.start == start && styles[high + 1].start - 1 == end) {
if (style == null) {
if (item.style == null) return;
} else {
if (style.equals(item.style)) return;
}
}
}
freeRuns();
int modifyStart = high;
int modifyEnd = modifyStart;
while (modifyEnd < stylesCount) {
if (styles[modifyEnd + 1].start > end) break;
modifyEnd++;
}
if (modifyStart == modifyEnd) {
int styleStart = styles[modifyStart].start;
int styleEnd = styles[modifyEnd + 1].start - 1;
if (styleStart == start && styleEnd == end) {
styles[modifyStart].style = style;
return;
}
if (styleStart != start && styleEnd != end) {
int newLength = stylesCount + 2;
if (newLength > styles.length) {
int newSize = Math.min(newLength + 1024, Math.max(64, newLength * 2));
StyleItem[] newStyles = new StyleItem[newSize];
System.arraycopy(styles, 0, newStyles, 0, stylesCount);
styles = newStyles;
}
System.arraycopy(styles, modifyEnd + 1, styles, modifyEnd + 3, stylesCount - modifyEnd - 1);
StyleItem item = new StyleItem();
item.start = start;
item.style = style;
styles[modifyStart + 1] = item;
item = new StyleItem();
item.start = end + 1;
item.style = styles[modifyStart].style;
styles[modifyStart + 2] = item;
stylesCount = newLength;
return;
}
}
if (start == styles[modifyStart].start) modifyStart--;
if (end == styles[modifyEnd + 1].start - 1) modifyEnd++;
int newLength = stylesCount + 1 - (modifyEnd - modifyStart - 1);
if (newLength > styles.length) {
int newSize = Math.min(newLength + 1024, Math.max(64, newLength * 2));
StyleItem[] newStyles = new StyleItem[newSize];
System.arraycopy(styles, 0, newStyles, 0, stylesCount);
styles = newStyles;
}
System.arraycopy(styles, modifyEnd, styles, modifyStart + 2, stylesCount - modifyEnd);
StyleItem item = new StyleItem();
item.start = start;
item.style = style;
styles[modifyStart + 1] = item;
styles[modifyStart + 2].start = end + 1;
stylesCount = newLength;
} finally {
if (pool != null) pool.release();
}
}
/**
* Sets the receiver's tab list. Each value in the tab list specifies
* the space in pixels from the origin of the text layout to the respective
* tab stop. The last tab stop width is repeated continuously.
*
* @param tabs the new tab list
*
* @exception SWTException <ul>
* <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li>
* </ul>
*/
public void setTabs(int[] tabs) {
checkLayout();
if (this.tabs == null && tabs == null) return;
if (this.tabs != null && tabs !=null) {
if (this.tabs.length == tabs.length) {
int i;
for (i = 0; i < tabs.length; i++) {
if (this.tabs[i] != tabs[i]) break;
}
if (i == tabs.length) return;
}
}
NSAutoreleasePool pool = null;
if (!NSThread.isMainThread()) pool = (NSAutoreleasePool) new NSAutoreleasePool().alloc().init();
try {
freeRuns();
this.tabs = tabs;
} finally {
if (pool != null) pool.release();
}
}
/**
* Sets the receiver's text.
*<p>
* Note: Setting the text also clears all the styles. This method
* returns without doing anything if the new text is the same as
* the current text.
* </p>
*
* @param text the new text
*
* @exception IllegalArgumentException <ul>
* <li>ERROR_NULL_ARGUMENT - if the text is null</li>
* </ul>
* @exception SWTException <ul>
* <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li>
* </ul>
*/
public void setText (String text) {
checkLayout ();
if (text == null) SWT.error(SWT.ERROR_NULL_ARGUMENT);
if (text.equals(this.text)) return;
NSAutoreleasePool pool = null;
if (!NSThread.isMainThread()) pool = (NSAutoreleasePool) new NSAutoreleasePool().alloc().init();
try {
freeRuns();
this.text = text;
styles = new StyleItem[2];
styles[0] = new StyleItem();
styles[1] = new StyleItem();
styles[1].start = text.length();
stylesCount = 2;
} finally {
if (pool != null) pool.release();
}
}
/**
* Sets the line width of the receiver, which determines how
* text should be wrapped and aligned. The default value is
* <code>-1</code> which means wrapping is disabled.
*
* @param width the new width
*
* @exception IllegalArgumentException <ul>
* <li>ERROR_INVALID_ARGUMENT - if the width is <code>0</code> or less than <code>-1</code></li>
* </ul>
* @exception SWTException <ul>
* <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li>
* </ul>
*
* @see #setAlignment(int)
*/
public void setWidth (int width) {
checkLayout();
if (width < -1 || width == 0) SWT.error(SWT.ERROR_INVALID_ARGUMENT);
if (this.wrapWidth == width) return;
NSAutoreleasePool pool = null;
if (!NSThread.isMainThread()) pool = (NSAutoreleasePool) new NSAutoreleasePool().alloc().init();
try {
freeRuns();
this.wrapWidth = width;
} finally {
if (pool != null) pool.release();
}
}
/**
* Returns a string containing a concise, human-readable
* description of the receiver.
*
* @return a string representation of the receiver
*/
public String toString () {
if (isDisposed()) return "TextLayout {*DISPOSED*}";
return "TextLayout {" + text + "}";
}
static int /*long*/ textLayoutProc(int /*long*/ id, int /*long*/ sel) {
int /*long*/ [] jniRef = new int /*long*/ [1];
OS.object_getInstanceVariable(id, SWT_OBJECT, jniRef);
if (jniRef[0] == 0) return 0;
StyleItem run = (StyleItem) OS.JNIGetObject(jniRef[0]);
if (run == null) return 0;
TextStyle style = run.style;
if (style == null) return 0;
GlyphMetrics metrics = style.metrics;
if (metrics == null) return 0;
if (sel == OS.sel_cellSize) {
NSSize size = new NSSize();
size.width = metrics.width;
size.height = metrics.ascent + metrics.descent;
/* NOTE that this is freed in C */
int /*long*/ result = OS.malloc(NSSize.sizeof);
OS.memmove(result, size, NSSize.sizeof);
return result;
} else if (sel == OS.sel_cellBaselineOffset) {
NSPoint point = new NSPoint();
point.y = -metrics.descent;
/* NOTE that this is freed in C */
int /*long*/ result = OS.malloc(NSPoint.sizeof);
OS.memmove(result, point, NSPoint.sizeof);
return result;
}
return 0;
}
/*
* Translate a client offset to an internal offset
*/
int translateOffset (int offset) {
int length = text.length();
if (length == 0) return offset;
if (segments == null) return offset;
int nSegments = segments.length;
if (nSegments == 0) return offset;
if (segmentsChars == null) {
if (nSegments == 1) return offset;
if (nSegments == 2) {
if (segments[0] == 0 && segments[1] == length) return offset;
}
}
for (int i = 0; i < nSegments && offset - i >= segments[i]; i++) {
offset++;
}
return offset;
}
/*
* Translate an internal offset to a client offset
*/
int untranslateOffset (int offset) {
int length = text.length();
if (length == 0) return offset;
if (segments == null) return offset;
int nSegments = segments.length;
if (nSegments == 0) return offset;
if (segmentsChars == null) {
if (nSegments == 1) return offset;
if (nSegments == 2) {
if (segments[0] == 0 && segments[1] == length) return offset;
}
}
for (int i = 0; i < nSegments && offset > segments[i]; i++) {
offset--;
}
return offset;
}
}
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