private IHyperlink getHyperlink(MouseEvent e) {
// bug 257868 support image hyperlinks
if (annotations.isEmpty()) {
return null;
}
Point point = new Point(e.x, e.y);
for (ImageAnnotation annotation : annotations) {
if (annotation.getHyperlnkAnnotation() == null) {
continue;
}
Rectangle region = getRegion(annotation);
if (region != null) {
if (region.contains(point)) {
AnnotationHyperlinkDetector detector =
(AnnotationHyperlinkDetector)
viewer.getTextWidget().getData(AnnotationHyperlinkDetector.class.getName());
if (detector != null) {
IHyperlink hyperlink =
detector.createHyperlink(
viewer, viewer.getAnnotationModel(), annotation.getHyperlnkAnnotation());
return hyperlink;
}
}
}
}
return null;
}
/**
* get the widget-relative region of the given annotation
*
* @return the region, or null if it is unknown
*/
private Rectangle getRegion(ImageAnnotation annotation) {
if (annotation.getImage() == null) {
return null;
}
Position position = viewer.getAnnotationModel().getPosition(annotation);
Point locationAtOffset = viewer.getTextWidget().getLocationAtOffset(position.offset);
Rectangle bounds = annotation.getImage().getBounds();
Rectangle rectange =
new Rectangle(locationAtOffset.x, locationAtOffset.y, bounds.width, bounds.height);
return rectange;
}
@Override
public void run() {
try {
final Map<String, ImageData> urlToImageData = new HashMap<>();
for (ImageAnnotation annotation : annotations) {
final String imgSrc = annotation.getUrl();
if (imgSrc != null && !urlToImageData.containsKey(imgSrc)) {
try {
URL location =
imageCache.getBase() == null
? new URL(imgSrc)
: new URL(imageCache.getBase(), imgSrc);
try {
InputStream in = new BufferedInputStream(location.openStream());
try {
urlToImageData.put(imgSrc, new ImageData(in));
} catch (SWTException e) {
if (e.code != SWT.ERROR_INVALID_IMAGE) {
throw e;
}
urlToImageData.put(imgSrc, null);
} finally {
in.close();
}
} catch (Exception e) {
if (WikiTextUiPlugin.getDefault() != null) {
WikiTextUiPlugin.getDefault()
.log(
IStatus.ERROR,
NLS.bind(Messages.ImageManager_accessFailed, new Object[] {location}),
e);
}
urlToImageData.put(imgSrc, null);
}
} catch (MalformedURLException e) {
urlToImageData.put(imgSrc, null);
}
display.asyncExec(
new Runnable() {
public void run() {
updateImage(imgSrc, urlToImageData.get(imgSrc));
}
});
}
if (Thread.currentThread().isInterrupted()) {
break;
}
}
} finally {
imageResolver = null;
}
}
@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;
}
}
}