/**
* Event.detail line start offset (input) Event.text line text (input) LineStyleEvent.styles
* Enumeration of StyleRanges, need to be in order. (output) LineStyleEvent.background line
* background color (output)
*/
public void lineGetStyle(LineStyleEvent event) {
Vector styles = new Vector();
int token;
StyleRange lastStyle;
// If the line is part of a block comment, create one style for the entire line.
if (inBlockComment(event.lineOffset, event.lineOffset + event.lineText.length())) {
styles.addElement(
new StyleRange(event.lineOffset, event.lineText.length(), getColor(COMMENT), null));
event.styles = new StyleRange[styles.size()];
styles.copyInto(event.styles);
return;
}
Color defaultFgColor = ((Control) event.widget).getForeground();
scanner.setRange(event.lineText);
token = scanner.nextToken();
while (token != EOF) {
if (token == OTHER) {
// do nothing for non-colored tokens
} else if (token != WHITE) {
Color color = getColor(token);
// Only create a style if the token color is different than the
// widget's default foreground color and the token's style is not
// bold. Keywords are bolded.
if ((!color.equals(defaultFgColor)) || (token == KEY)) {
StyleRange style =
new StyleRange(
scanner.getStartOffset() + event.lineOffset, scanner.getLength(), color, null);
if (token == KEY) {
style.fontStyle = SWT.BOLD;
}
if (styles.isEmpty()) {
styles.addElement(style);
} else {
// Merge similar styles. Doing so will improve performance.
lastStyle = (StyleRange) styles.lastElement();
if (lastStyle.similarTo(style) && (lastStyle.start + lastStyle.length == style.start)) {
lastStyle.length += style.length;
} else {
styles.addElement(style);
}
}
}
} else if ((!styles.isEmpty())
&& ((lastStyle = (StyleRange) styles.lastElement()).fontStyle == SWT.BOLD)) {
int start = scanner.getStartOffset() + event.lineOffset;
lastStyle = (StyleRange) styles.lastElement();
// A font style of SWT.BOLD implies that the last style
// represents a java keyword.
if (lastStyle.start + lastStyle.length == start) {
// Have the white space take on the style before it to
// minimize the number of style ranges created and the
// number of font style changes during rendering.
lastStyle.length += scanner.getLength();
}
}
token = scanner.nextToken();
}
event.styles = new StyleRange[styles.size()];
styles.copyInto(event.styles);
}
/**
* Event.detail line start offset (input) Event.text line text (input) LineStyleEvent.styles
* Enumeration of StyleRanges, need to be in order. (output) LineStyleEvent.background line
* background color (output)
*/
public void lineGetStyle(LineStyleEvent event) {
Vector<StyleRange> styles = new Vector<StyleRange>();
int token;
StyleRange lastStyle;
if (inBlockComment(event.lineOffset, event.lineOffset + event.lineText.length())) {
styles.addElement(
new StyleRange(event.lineOffset, event.lineText.length() + 4, colors[2], null));
event.styles = new StyleRange[styles.size()];
styles.copyInto(event.styles);
return;
}
scanner.setRange(event.lineText);
String xs = ((StyledText) event.widget).getText();
if (xs != null) parseBlockComments(xs);
token = scanner.nextToken();
while (token != EOF) {
if (token == OTHER) {
// do nothing
} else if ((token == WHITE) && (!styles.isEmpty())) {
int start = scanner.getStartOffset() + event.lineOffset;
lastStyle = (StyleRange) styles.lastElement();
if (lastStyle.fontStyle != SWT.NORMAL) {
if (lastStyle.start + lastStyle.length == start) {
// have the white space take on the style before it to minimize font style
// changes
lastStyle.length += scanner.getLength();
}
}
} else {
Color color = getColor(token);
if (color != colors[0]) { // hardcoded default foreground color, black
StyleRange style =
new StyleRange(
scanner.getStartOffset() + event.lineOffset, scanner.getLength(), color, null);
if (token == KEY) {
style.fontStyle = SWT.BOLD;
}
if (styles.isEmpty()) {
styles.addElement(style);
} else {
lastStyle = (StyleRange) styles.lastElement();
if (lastStyle.similarTo(style) && (lastStyle.start + lastStyle.length == style.start)) {
lastStyle.length += style.length;
} else {
styles.addElement(style);
}
}
}
}
token = scanner.nextToken();
}
event.styles = new StyleRange[styles.size()];
styles.copyInto(event.styles);
}
public static void main(String[] args) {
Display display = new Display();
Shell shell = new Shell(display);
shell.setText("StyledText with underline and strike through");
shell.setLayout(new FillLayout());
StyledText text = new StyledText(shell, SWT.BORDER);
text.setText("0123456789 ABCDEFGHIJKLM NOPQRSTUVWXYZ");
// make 0123456789 appear underlined
StyleRange style1 = new StyleRange();
style1.start = 0;
style1.length = 10;
style1.underline = true;
text.setStyleRange(style1);
// make ABCDEFGHIJKLM have a strike through
StyleRange style2 = new StyleRange();
style2.start = 11;
style2.length = 13;
style2.strikeout = true;
text.setStyleRange(style2);
// make NOPQRSTUVWXYZ appear underlined and have a strike through
StyleRange style3 = new StyleRange();
style3.start = 25;
style3.length = 13;
style3.underline = true;
style3.strikeout = true;
text.setStyleRange(style3);
shell.pack();
shell.open();
while (!shell.isDisposed()) {
if (!display.readAndDispatch()) display.sleep();
}
display.dispose();
}
/**
* creates the style range of the StyledText for the range of the contained editor
*
* <p>XXX problem will occur if there is a newline in the position. Working on this! code folding.
*/
private StyleRange[] createStyleRange(ContainedEditorManager c, Position p) {
int offset = p.offset;
int length = p.length;
Rectangle rect = c.getControl().getBounds();
int ascent = rect.height - 4;
int descent = 4;
// use two style ranges
// first style range covers the entire size of the contained editor
StyleRange first = new StyleRange();
first.start = offset;
first.length = Math.min(1, length);
first.background = this.containingEditor.colorManager.getColor(new RGB(255, 255, 255));
first.metrics =
new GlyphMetrics(
ascent + ContainingEditor.MARGIN,
descent + ContainingEditor.MARGIN,
rect.width + 2 * ContainingEditor.MARGIN);
// this style range is hidden. the height and width are 0
StyleRange second = new StyleRange();
second.start = offset + 1;
second.length = length - 1;
second.background = this.containingEditor.colorManager.getColor(new RGB(255, 255, 255));
second.metrics = new GlyphMetrics(0, 0, 0);
second.font = TINY_FONT;
return new StyleRange[] {first, second};
}
/**
* Inputs in the view the selected PO whose pretty code is recorded in the Goal class
*
* @throws IOException
*/
public void inputPO() throws IOException {
// we want to see a context, not the goal
if (!POMode) {
return;
}
if (ttext > 0) // if we've a title text
setPartName(IConstants.PO_VIEW_TITLE + " : po " + ttext); // put it in the view
else setPartName(IConstants.PO_VIEW_TITLE); // else, put the view title only
// gets the PO pretty text
String container = "";
container = Goal.getGoal();
// if the Goal is empty, we can return
if (container.equals("")) {
text.setText(container);
return;
}
// get the style ranges
Vector<StyleRange> range = Goal.getStyleRanges();
int w = range.size() - 1;
// keep the ranges which can be applied in the text area
while (((StyleRange) range.get(w)).start >= container.length()) {
w--;
}
// put the bar between the goal and the arrow result excerpted from this same goal
container += "\n_______________________________________________\n\n";
container += Goal.getResult();
text.setText(container);
// apply style ranges to the first part of the goal (before the bar)
for (int e = 0; e <= w; e++) {
text.setStyleRange((StyleRange) range.get(e));
}
// puts a style range to color the bar in black
StyleRange srg = new StyleRange();
srg.start += Goal.getGoal().length();
srg.length = 50;
srg.foreground = new Color(null, 0, 0, 0);
text.setStyleRange(srg);
// puts a style range to color the end of the goal in blue
srg = new StyleRange();
srg.start += Goal.getGoal().length() + 50;
srg.length = Goal.getResult().length();
srg.foreground = new Color(null, 0, 0, 255);
text.setStyleRange(srg);
// sets the cursor at the end of the code
text.setSelection(text.getText().length(), text.getText().length());
}
@Override
public void run() {
try {
String query = queryString.getSelectionText();
Point queryRange = queryString.getSelectionRange();
if ("".equals(query)) // $NON-NLS-1$
{
query = queryString.getText();
queryRange = new Point(0, queryString.getCharCount());
}
try {
// force parsing of OQL query
SnapshotFactory.createQuery(query);
new OQLJob(OQLPane.this, query, state).schedule();
} catch (final OQLParseException e) {
int start = findInText(query, e.getLine(), e.getColumn());
StyleRange style2 = new StyleRange();
style2.start = start + queryRange.x;
style2.length = queryRange.y - start;
style2.foreground = JFaceResources.getColorRegistry().get(JFacePreferences.ERROR_COLOR);
style2.underline = true;
style2.underlineStyle = SWT.UNDERLINE_SQUIGGLE;
queryString.replaceStyleRanges(0, queryString.getCharCount(), new StyleRange[] {style2});
createExceptionPane(e, query);
} catch (Exception e) {
createExceptionPane(e, query);
}
} catch (PartInitException e1) {
ErrorHelper.logThrowableAndShowMessage(e1, Messages.OQLPane_ErrorExecutingQuery);
}
}
protected void adaptTextPresentation(
final TextPresentation presentation, final int offset, final int insertLength) {
int yoursStart = offset;
int yoursEnd = offset + insertLength - 1;
yoursEnd = Math.max(yoursStart, yoursEnd);
@SuppressWarnings("rawtypes")
Iterator e = presentation.getAllStyleRangeIterator();
while (e.hasNext()) {
StyleRange range = (StyleRange) e.next();
int myStart = range.start;
int myEnd = range.start + range.length - 1;
myEnd = Math.max(myStart, myEnd);
if (myEnd < yoursStart) {
continue;
}
if (myStart < yoursStart) {
range.length += insertLength;
} else {
range.start += insertLength;
}
}
}
public static StyleRange copy(final StyleRange range) {
final StyleRange result = new StyleRange(range);
result.start = range.start;
result.length = range.length;
result.fontStyle = range.fontStyle;
return result;
}
private StyleRange createStyleRange(int start, int end, Styler style) {
StyleRange styleRange = new StyleRange();
styleRange.start = start;
styleRange.length = end - start;
style.applyStyles(styleRange);
return styleRange;
}
private void formatIpAddress(int start, int end) {
StyleRange style = new StyleRange();
style.start = start;
style.length = end - start;
style.font = new Font(sShell.getDisplay(), "Courier New", 9, SWT.BOLD);
style.foreground = new Color(sShell.getDisplay(), 255, 127, 0); // Orange
activeHostsFileStyledText.setStyleRange(style);
}
private void formatRemark(int start, int end) {
StyleRange style = new StyleRange();
style.start = start;
style.length = end - start;
style.font = new Font(sShell.getDisplay(), "Courier New", 9, SWT.NORMAL);
style.foreground = new Color(sShell.getDisplay(), 0, 128, 0); // Green
activeHostsFileStyledText.setStyleRange(style);
}
private void formatHostName(int start, int end) {
StyleRange style = new StyleRange();
style.start = start;
style.length = end - start;
style.font = new Font(sShell.getDisplay(), "Courier New", 9, SWT.BOLD);
style.foreground = sShell.getDisplay().getSystemColor(SWT.COLOR_BLUE);
activeHostsFileStyledText.setStyleRange(style);
}
/**
* {@inheritDoc}
*
* <p>Performance optimization: since we know at this place that none of the clients expects the
* given range to be untouched we reuse the given range as return value.
*/
@Override
protected StyleRange modelStyleRange2WidgetStyleRange(StyleRange range) {
IRegion region = modelRange2WidgetRange(new Region(range.start, range.length));
if (region != null) {
// don't clone the style range, but simply reuse it.
range.start = region.getOffset();
range.length = region.getLength();
return range;
}
return null;
}
private org.eclipse.swt.custom.StyleRange getStyleRangeAtPosition(
org.eclipse.jface.text.Position position) {
org.eclipse.swt.custom.StyleRange styleRange = null;
try {
styleRange = textWidget.getStyleRangeAtOffset(position.offset);
} catch (IllegalArgumentException iae) {
}
if (styleRange == null) {
styleRange =
new org.eclipse.swt.custom.StyleRange(position.offset, position.length, black, null);
} else {
styleRange.length = position.length;
}
return styleRange;
}
private void updateStyle(ITextViewer viewer) {
StyledText text = viewer.getTextWidget();
int widgetOffset = getWidgetOffset(viewer, fRememberedStyleRange.start);
StyleRange range = new StyleRange(fRememberedStyleRange);
range.start = widgetOffset;
range.length = fRememberedStyleRange.length;
StyleRange currentRange = text.getStyleRangeAtOffset(widgetOffset);
if (currentRange != null) {
range.strikeout = currentRange.strikeout;
range.underline = currentRange.underline;
range.fontStyle = currentRange.fontStyle;
}
// http://dev.eclipse.org/bugs/show_bug.cgi?id=34754
try {
text.setStyleRange(range);
} catch (IllegalArgumentException x) {
// catching exception as offset + length might be outside of the text widget
fRememberedStyleRange = null;
}
}
private void highlight(int start, String search) {
stylerange.start = start;
stylerange.length = search.length();
text.setStyleRange(stylerange);
}
public static StyleRange newStyleRange(StyleRange from) {
StyleRange r = new StyleRange(from);
r.start = from.start;
r.length = from.length;
return r;
}
@SuppressWarnings("unchecked")
private void updateImage(String imgSrc, ImageData imageData) {
if (display.isDisposed() || viewer.getTextWidget().isDisposed()) {
return;
}
Image image =
imageData == null
? imageCache.getMissingImage()
: ImageDescriptor.createFromImageData(imageData).createImage();
imageCache.putImage(imgSrc, image);
Set<ImageAnnotation> modifiedAnnotations = new HashSet<>();
AnnotationModel annotationModel = (AnnotationModel) viewer.getAnnotationModel();
Object annotationLockObject = annotationModel.getLockObject();
if (annotationLockObject == null) {
annotationLockObject = annotationModel;
}
synchronized (annotationLockObject) {
Iterator<Annotation> iterator = annotationModel.getAnnotationIterator();
while (iterator.hasNext()) {
Annotation annotation = iterator.next();
if (annotation instanceof ImageAnnotation) {
ImageAnnotation imageAnnotation = (ImageAnnotation) annotation;
if (imgSrc.equals(imageAnnotation.getUrl())) {
imageAnnotation.setImage(image);
modifiedAnnotations.add(imageAnnotation);
}
}
}
}
if (!modifiedAnnotations.isEmpty()) {
computingChanges = true;
try {
boolean rangesAdjusted = false;
List<StyleRange> ranges = new ArrayList<>();
Iterator<?> allStyleRangeIterator = viewer.getTextPresentation().getAllStyleRangeIterator();
while (allStyleRangeIterator.hasNext()) {
StyleRange range = (StyleRange) allStyleRangeIterator.next();
ranges.add((StyleRange) range.clone());
}
GC gc = new GC(viewer.getTextWidget());
try {
viewer.getTextWidget().setRedraw(false);
TextPresentation textPresentation = viewer.getTextPresentation();
// textPresentation.
for (ImageAnnotation annotation : modifiedAnnotations) {
int height = annotation.getImage().getBounds().height;
Position position = annotationModel.getPosition(annotation);
String widgetText = viewer.getTextWidget().getText();
Font font = null;
if (widgetText.length() > 0 && widgetText.length() > position.offset) {
StyleRange styleRange = viewer.getTextWidget().getStyleRangeAtOffset(position.offset);
if (styleRange != null) {
font = styleRange.font;
}
}
if (font == null) {
font = viewer.getTextWidget().getFont();
}
gc.setFont(font);
Point extent = gc.textExtent("\n"); // $NON-NLS-1$
if (extent.y > 0) {
int numNewlines = (int) Math.ceil(((double) height) / ((double) extent.y));
final int originalNewlines = numNewlines;
IDocument document = viewer.getDocument();
try {
for (int x = position.offset; x < document.getLength(); ++x) {
if (document.getChar(x) == '\n') {
if (x != position.offset
&& Util.annotationsIncludeOffset(viewer.getAnnotationModel(), x)) {
break;
}
--numNewlines;
} else {
break;
}
}
if (numNewlines > 0) {
String newlines = ""; // $NON-NLS-1$
for (int x = 0; x < numNewlines; ++x) {
newlines += "\n"; // $NON-NLS-1$
}
document.replace(position.offset + 1, 0, newlines);
} else if (numNewlines < 0) {
document.replace(position.offset, -numNewlines, ""); // $NON-NLS-1$
}
if (numNewlines != 0) {
// no need to fixup other annotation positions, since the annotation model is
// hooked into the document.
// fix up styles
for (StyleRange range : ranges) {
if (range.start > position.offset) {
range.start += numNewlines;
rangesAdjusted = true;
} else if (range.start + range.length > position.offset) {
range.length += numNewlines;
rangesAdjusted = true;
}
}
}
// bug# 248643: update the annotation size to reflect the full size of the image
// so that it gets repainted when some portion of the image is exposed
// as a result of scrolling
if (position.getLength() != originalNewlines) {
annotationModel.modifyAnnotationPosition(
annotation, new Position(position.offset, originalNewlines));
}
} catch (BadLocationException e) {
// ignore
}
}
}
if (rangesAdjusted) {
TextPresentation presentation = new TextPresentation();
if (textPresentation.getDefaultStyleRange() != null) {
StyleRange defaultStyleRange =
(StyleRange) textPresentation.getDefaultStyleRange().clone();
if (viewer.getDocument() != null) {
if (defaultStyleRange.length < viewer.getDocument().getLength()) {
defaultStyleRange.length = viewer.getDocument().getLength();
}
}
presentation.setDefaultStyleRange(defaultStyleRange);
}
for (StyleRange range : ranges) {
presentation.addStyleRange(range);
}
viewer.setTextPresentation(presentation);
viewer.invalidateTextPresentation();
}
} finally {
viewer.getTextWidget().setRedraw(true);
gc.dispose();
}
viewer.getTextWidget().redraw();
} finally {
computingChanges = false;
}
}
}
private boolean prepareTwigRegions(
Collection<StyleRange> holdResults,
ITwigScriptRegion region,
int regionStart,
int partitionStartOffset,
int partitionLength) {
assert (region.getType() == TwigRegionContext.TWIG_CONTENT
|| region.getType() == TwigRegionContext.TWIG_COMMENT);
StyleRange styleRange = null;
TextAttribute attr;
TextAttribute previousAttr = null;
ITextRegion[] twigTokens = null;
try {
int from;
int length;
if (partitionStartOffset < regionStart) {
from = 0;
length = partitionLength - (regionStart - partitionStartOffset);
} else {
from = partitionStartOffset - regionStart;
length = partitionLength;
}
twigTokens = region.getTwigTokens(from, Math.min(length, region.getLength()));
ITextRegion prevElement = null;
for (int i = 0; i < twigTokens.length; i++) {
ITextRegion element = twigTokens[i];
attr = getAttributeFor(element);
// Check that the elements are different - otherwise the
// coloring is not valid
if (prevElement == element || attr == null) {
continue;
}
if ((styleRange != null)
&& (previousAttr != null)
&& (previousAttr.equals(attr))
&& prevElement != null
&& prevElement.getLength() == prevElement.getLength()) {
// extends the prev styleRange with the current element
// length
styleRange.length += element.getLength();
if (styleRange.start + styleRange.length > partitionStartOffset + partitionLength) {
styleRange.length -=
(styleRange.start + styleRange.length) - (partitionStartOffset + partitionLength);
}
} else {
// create new styleRange
int styleStart = regionStart + element.getStart();
int styleLength = element.getLength();
if (styleStart + styleLength < partitionStartOffset) { // if
// the
// range
// ends
// before
// the
// requested
// starting
// position
// -
// ignoring
// it
continue;
}
if (styleStart < partitionStartOffset) { // if the region
// starts before
// the requested
// starting
// position -
// adjusting the
// style start
// position
styleLength -= (partitionStartOffset - styleStart);
styleStart = partitionStartOffset;
}
if (styleStart > partitionStartOffset + partitionLength) {
// if the region ends after the requested end position -
// making it shorter
styleLength -= styleStart - (partitionStartOffset + partitionLength);
}
if (attr.getBackground() != null && element.getTextEnd() != element.getEnd()) { // in
// case
// of
// background
// color
// make
// sure
// the
// highlighting
// will
// not
// paint
// the
// whitespaces
// applying style to the region w/o the whitespace
styleRange =
new StyleRange(
styleStart,
styleLength - (element.getEnd() - element.getTextEnd()),
attr.getForeground(),
attr.getBackground(),
attr.getStyle());
if ((attr.getStyle() & TextAttribute.UNDERLINE) != 0) {
styleRange.underline = true;
styleRange.fontStyle &= ~TextAttribute.UNDERLINE;
}
if ((attr.getStyle() & TextAttribute.STRIKETHROUGH) != 0) {
styleRange.strikeout = true;
styleRange.fontStyle &= ~TextAttribute.STRIKETHROUGH;
}
holdResults.add(styleRange);
// applying style to the whitespace (important for the
// refresh of the specific range
styleRange =
new StyleRange(
regionStart + element.getTextEnd(),
element.getEnd() - element.getTextEnd(),
attr.getForeground(),
null,
attr.getStyle());
holdResults.add(styleRange);
previousAttr = null;
} else {
styleRange =
new StyleRange(
styleStart,
styleLength,
attr.getForeground(),
attr.getBackground(),
attr.getStyle());
if ((attr.getStyle() & TextAttribute.UNDERLINE) != 0) {
styleRange.underline = true;
styleRange.fontStyle &= ~TextAttribute.UNDERLINE;
}
if ((attr.getStyle() & TextAttribute.STRIKETHROUGH) != 0) {
styleRange.strikeout = true;
styleRange.fontStyle &= ~TextAttribute.STRIKETHROUGH;
}
holdResults.add(styleRange);
// technically speaking, we don't need to update
// previousAttr
// in the other case, because the other case is when
// it hasn't changed
previousAttr = attr;
}
}
prevElement = element;
}
return true;
} catch (BadLocationException e) {
Logger.logException(e);
return false;
}
}