コード例 #1
0
ファイル: ImageManager.java プロジェクト: eclipse/mylyn.docs
    @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;
      }
    }
コード例 #2
0
ファイル: ImageManager.java プロジェクト: eclipse/mylyn.docs
  @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;
      }
    }
  }