예제 #1
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  public Shape modelToView(GlyphView v, int pos, Position.Bias bias, Shape a)
      throws BadLocationException {

    sync(v);
    Rectangle alloc = (a instanceof Rectangle) ? (Rectangle) a : a.getBounds();
    int p0 = v.getStartOffset();
    int p1 = v.getEndOffset();
    TabExpander expander = v.getTabExpander();
    Segment text;

    if (pos == p1) {
      // The caller of this is left to right and borders a right to
      // left view, return our end location.
      return new Rectangle(alloc.x + alloc.width, alloc.y, 0, metrics.getHeight());
    }
    if ((pos >= p0) && (pos <= p1)) {
      // determine range to the left of the position
      text = v.getText(p0, pos);
      int[] justificationData = getJustificationData(v);
      int width =
          Utilities.getTabbedTextWidth(v, text, metrics, alloc.x, expander, p0, justificationData);
      SegmentCache.releaseSharedSegment(text);
      return new Rectangle(alloc.x + width, alloc.y, 0, metrics.getHeight());
    }
    throw new BadLocationException("modelToView - can't convert", p1);
  }
예제 #2
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  /** Paints the glyphs representing the given range. */
  public void paint(GlyphView v, Graphics g, Shape a, int p0, int p1) {
    sync(v);
    Segment text;
    TabExpander expander = v.getTabExpander();
    Rectangle alloc = (a instanceof Rectangle) ? (Rectangle) a : a.getBounds();

    // determine the x coordinate to render the glyphs
    int x = alloc.x;
    int p = v.getStartOffset();
    int[] justificationData = getJustificationData(v);
    if (p != p0) {
      text = v.getText(p, p0);
      int width = Utilities.getTabbedTextWidth(v, text, metrics, x, expander, p, justificationData);
      x += width;
      SegmentCache.releaseSharedSegment(text);
    }

    // determine the y coordinate to render the glyphs
    int y = alloc.y + metrics.getHeight() - metrics.getDescent();

    // render the glyphs
    text = v.getText(p0, p1);
    g.setFont(metrics.getFont());

    Utilities.drawTabbedText(v, text, x, y, g, expander, p0, justificationData);
    SegmentCache.releaseSharedSegment(text);
  }
예제 #3
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 @SuppressWarnings("deprecation")
 void sync(GlyphView v) {
   Font f = v.getFont();
   if ((metrics == null) || (!f.equals(metrics.getFont()))) {
     // fetch a new FontMetrics
     Container c = v.getContainer();
     metrics = (c != null) ? c.getFontMetrics(f) : Toolkit.getDefaultToolkit().getFontMetrics(f);
   }
 }
예제 #4
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 /**
  * Determines the best location (in the model) to break the given view. This method attempts to
  * break on a whitespace location. If a whitespace location can't be found, the nearest character
  * location is returned.
  *
  * @param v the view
  * @param p0 the location in the model where the fragment should start its representation >= 0
  * @param pos the graphic location along the axis that the broken view would occupy >= 0; this may
  *     be useful for things like tab calculations
  * @param len specifies the distance into the view where a potential break is desired >= 0
  * @return the model location desired for a break
  * @see View#breakView
  */
 public int getBoundedPosition(GlyphView v, int p0, float x, float len) {
   sync(v);
   TabExpander expander = v.getTabExpander();
   Segment s = v.getText(p0, v.getEndOffset());
   int[] justificationData = getJustificationData(v);
   int index =
       Utilities.getTabbedTextOffset(
           v, s, metrics, (int) x, (int) (x + len), expander, p0, false, justificationData);
   SegmentCache.releaseSharedSegment(s);
   int p1 = p0 + index;
   return p1;
 }
예제 #5
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  /**
   * Provides a mapping from the view coordinate space to the logical coordinate space of the model.
   *
   * @param v the view containing the view coordinates
   * @param x the X coordinate
   * @param y the Y coordinate
   * @param a the allocated region to render into
   * @param biasReturn either <code>Position.Bias.Forward</code> or <code>Position.Bias.Backward
   *     </code> is returned as the zero-th element of this array
   * @return the location within the model that best represents the given point of view
   * @see View#viewToModel
   */
  public int viewToModel(GlyphView v, float x, float y, Shape a, Position.Bias[] biasReturn) {

    Rectangle2D alloc = (a instanceof Rectangle2D) ? (Rectangle2D) a : a.getBounds2D();
    // Move the y co-ord of the hit onto the baseline.  This is because TextLayout supports
    // italic carets and we do not.
    TextHitInfo hit = layout.hitTestChar(x - (float) alloc.getX(), 0);
    int pos = hit.getInsertionIndex();

    if (pos == v.getEndOffset()) {
      pos--;
    }

    biasReturn[0] = hit.isLeadingEdge() ? Position.Bias.Forward : Position.Bias.Backward;
    return pos + v.getStartOffset();
  }
예제 #6
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 /** Determine the span the glyphs given a start location (for tab expansion). */
 public float getSpan(GlyphView v, int p0, int p1, TabExpander e, float x) {
   sync(v);
   Segment text = v.getText(p0, p1);
   int[] justificationData = getJustificationData(v);
   int width = Utilities.getTabbedTextWidth(v, text, metrics, (int) x, e, p0, justificationData);
   SegmentCache.releaseSharedSegment(text);
   return width;
 }
예제 #7
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  /**
   * Determine the span the glyphs given a start location (for tab expansion). This implementation
   * assumes it has no tabs (i.e. TextLayout doesn't deal with tab expansion).
   */
  public float getSpan(GlyphView v, int p0, int p1, TabExpander e, float x) {

    if ((p0 == v.getStartOffset()) && (p1 == v.getEndOffset())) {
      return layout.getAdvance();
    }
    int p = v.getStartOffset();
    int index0 = p0 - p;
    int index1 = p1 - p;

    TextHitInfo hit0 = TextHitInfo.afterOffset(index0);
    TextHitInfo hit1 = TextHitInfo.beforeOffset(index1);
    float[] locs = layout.getCaretInfo(hit0);
    float x0 = locs[0];
    locs = layout.getCaretInfo(hit1);
    float x1 = locs[0];
    return (x1 > x0) ? x1 - x0 : x0 - x1;
  }
예제 #8
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 /**
  * @return justificationData from the ParagraphRow this GlyphView is in or {@code null} if no
  *     justification is needed
  */
 private int[] getJustificationData(GlyphView v) {
   View parent = v.getParent();
   int[] ret = null;
   if (parent instanceof ParagraphView.Row) {
     ParagraphView.Row row = ((ParagraphView.Row) parent);
     ret = row.justificationData;
   }
   return ret;
 }
예제 #9
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 /**
  * Determines the model location that represents the maximum advance that fits within the given
  * span. This could be used to break the given view. The result should be a location just shy of
  * the given advance. This differs from viewToModel which returns the closest position which might
  * be proud of the maximum advance.
  *
  * @param v the view to find the model location to break at.
  * @param p0 the location in the model where the fragment should start it's representation >= 0.
  * @param pos the graphic location along the axis that the broken view would occupy >= 0. This may
  *     be useful for things like tab calculations.
  * @param len specifies the distance into the view where a potential break is desired >= 0.
  * @return the maximum model location possible for a break.
  * @see View#breakView
  */
 public int getBoundedPosition(GlyphView v, int p0, float x, float len) {
   if (len < 0) throw new IllegalArgumentException("Length must be >= 0.");
   // note: this only works because swing uses TextLayouts that are
   // only pure rtl or pure ltr
   TextHitInfo hit;
   if (layout.isLeftToRight()) {
     hit = layout.hitTestChar(len, 0);
   } else {
     hit = layout.hitTestChar(layout.getAdvance() - len, 0);
   }
   return v.getStartOffset() + hit.getCharIndex();
 }
예제 #10
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  /**
   * Provides a mapping from the view coordinate space to the logical coordinate space of the model.
   *
   * @param v the view containing the view coordinates
   * @param x the X coordinate
   * @param y the Y coordinate
   * @param a the allocated region to render into
   * @param biasReturn always returns <code>Position.Bias.Forward</code> as the zero-th element of
   *     this array
   * @return the location within the model that best represents the given point in the view
   * @see View#viewToModel
   */
  public int viewToModel(GlyphView v, float x, float y, Shape a, Position.Bias[] biasReturn) {

    sync(v);
    Rectangle alloc = (a instanceof Rectangle) ? (Rectangle) a : a.getBounds();
    int p0 = v.getStartOffset();
    int p1 = v.getEndOffset();
    TabExpander expander = v.getTabExpander();
    Segment text = v.getText(p0, p1);
    int[] justificationData = getJustificationData(v);
    int offs =
        Utilities.getTabbedTextOffset(
            v, text, metrics, alloc.x, (int) x, expander, p0, justificationData);
    SegmentCache.releaseSharedSegment(text);
    int retValue = p0 + offs;
    if (retValue == p1) {
      // No need to return backward bias as GlyphPainter1 is used for
      // ltr text only.
      retValue--;
    }
    biasReturn[0] = Position.Bias.Forward;
    return retValue;
  }
예제 #11
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 /**
  * Paint the glyphs for the given view. This is implemented to only render if the Graphics is of
  * type Graphics2D which is required by TextLayout (and this should be the case if running on the
  * JDK).
  */
 public void paint(GlyphView v, Graphics g, Shape a, int p0, int p1) {
   if (g instanceof Graphics2D) {
     Rectangle2D alloc = a.getBounds2D();
     Graphics2D g2d = (Graphics2D) g;
     float y = (float) alloc.getY() + layout.getAscent() + layout.getLeading();
     float x = (float) alloc.getX();
     if (p0 > v.getStartOffset() || p1 < v.getEndOffset()) {
       try {
         // TextLayout can't render only part of it's range, so if a
         // partial range is required, add a clip region.
         Shape s = v.modelToView(p0, Position.Bias.Forward, p1, Position.Bias.Backward, a);
         Shape savedClip = g.getClip();
         g2d.clip(s);
         layout.draw(g2d, x, y);
         g.setClip(savedClip);
       } catch (BadLocationException e) {
       }
     } else {
       layout.draw(g2d, x, y);
     }
   }
 }
예제 #12
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  public Shape modelToView(GlyphView v, int pos, Position.Bias bias, Shape a)
      throws BadLocationException {
    int offs = pos - v.getStartOffset();
    Rectangle2D alloc = a.getBounds2D();
    TextHitInfo hit =
        (bias == Position.Bias.Forward)
            ? TextHitInfo.afterOffset(offs)
            : TextHitInfo.beforeOffset(offs);
    float[] locs = layout.getCaretInfo(hit);

    // vertical at the baseline, should use slope and check if glyphs
    // are being rendered vertically.
    alloc.setRect(alloc.getX() + locs[0], alloc.getY(), 1, alloc.getHeight());
    return alloc;
  }
예제 #13
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  /**
   * Provides a way to determine the next visually represented model location that one might place a
   * caret. Some views may not be visible, they might not be in the same order found in the model,
   * or they just might not allow access to some of the locations in the model.
   *
   * @param v the view to use
   * @param pos the position to convert >= 0
   * @param a the allocated region to render into
   * @param direction the direction from the current position that can be thought of as the arrow
   *     keys typically found on a keyboard. This may be SwingConstants.WEST, SwingConstants.EAST,
   *     SwingConstants.NORTH, or SwingConstants.SOUTH.
   * @return the location within the model that best represents the next location visual position.
   * @exception BadLocationException
   * @exception IllegalArgumentException for an invalid direction
   */
  public int getNextVisualPositionFrom(
      GlyphView v, int pos, Position.Bias b, Shape a, int direction, Position.Bias[] biasRet)
      throws BadLocationException {

    int startOffset = v.getStartOffset();
    int endOffset = v.getEndOffset();
    Segment text;
    AbstractDocument doc;
    boolean viewIsLeftToRight;
    TextHitInfo currentHit, nextHit;

    switch (direction) {
      case View.NORTH:
        break;
      case View.SOUTH:
        break;
      case View.EAST:
        doc = (AbstractDocument) v.getDocument();
        viewIsLeftToRight = doc.isLeftToRight(startOffset, endOffset);

        if (startOffset == doc.getLength()) {
          if (pos == -1) {
            biasRet[0] = Position.Bias.Forward;
            return startOffset;
          }
          // End case for bidi text where newline is at beginning
          // of line.
          return -1;
        }
        if (pos == -1) {
          // Entering view from the left.
          if (viewIsLeftToRight) {
            biasRet[0] = Position.Bias.Forward;
            return startOffset;
          } else {
            text = v.getText(endOffset - 1, endOffset);
            char c = text.array[text.offset];
            SegmentCache.releaseSharedSegment(text);
            if (c == '\n') {
              biasRet[0] = Position.Bias.Forward;
              return endOffset - 1;
            }
            biasRet[0] = Position.Bias.Backward;
            return endOffset;
          }
        }
        if (b == Position.Bias.Forward) currentHit = TextHitInfo.afterOffset(pos - startOffset);
        else currentHit = TextHitInfo.beforeOffset(pos - startOffset);
        nextHit = layout.getNextRightHit(currentHit);
        if (nextHit == null) {
          return -1;
        }
        if (viewIsLeftToRight != layout.isLeftToRight()) {
          // If the layout's base direction is different from
          // this view's run direction, we need to use the weak
          // carrat.
          nextHit = layout.getVisualOtherHit(nextHit);
        }
        pos = nextHit.getInsertionIndex() + startOffset;

        if (pos == endOffset) {
          // A move to the right from an internal position will
          // only take us to the endOffset in a left to right run.
          text = v.getText(endOffset - 1, endOffset);
          char c = text.array[text.offset];
          SegmentCache.releaseSharedSegment(text);
          if (c == '\n') {
            return -1;
          }
          biasRet[0] = Position.Bias.Backward;
        } else {
          biasRet[0] = Position.Bias.Forward;
        }
        return pos;
      case View.WEST:
        doc = (AbstractDocument) v.getDocument();
        viewIsLeftToRight = doc.isLeftToRight(startOffset, endOffset);

        if (startOffset == doc.getLength()) {
          if (pos == -1) {
            biasRet[0] = Position.Bias.Forward;
            return startOffset;
          }
          // End case for bidi text where newline is at beginning
          // of line.
          return -1;
        }
        if (pos == -1) {
          // Entering view from the right
          if (viewIsLeftToRight) {
            text = v.getText(endOffset - 1, endOffset);
            char c = text.array[text.offset];
            SegmentCache.releaseSharedSegment(text);
            if ((c == '\n') || Character.isSpaceChar(c)) {
              biasRet[0] = Position.Bias.Forward;
              return endOffset - 1;
            }
            biasRet[0] = Position.Bias.Backward;
            return endOffset;
          } else {
            biasRet[0] = Position.Bias.Forward;
            return startOffset;
          }
        }
        if (b == Position.Bias.Forward) currentHit = TextHitInfo.afterOffset(pos - startOffset);
        else currentHit = TextHitInfo.beforeOffset(pos - startOffset);
        nextHit = layout.getNextLeftHit(currentHit);
        if (nextHit == null) {
          return -1;
        }
        if (viewIsLeftToRight != layout.isLeftToRight()) {
          // If the layout's base direction is different from
          // this view's run direction, we need to use the weak
          // carrat.
          nextHit = layout.getVisualOtherHit(nextHit);
        }
        pos = nextHit.getInsertionIndex() + startOffset;

        if (pos == endOffset) {
          // A move to the left from an internal position will
          // only take us to the endOffset in a right to left run.
          text = v.getText(endOffset - 1, endOffset);
          char c = text.array[text.offset];
          SegmentCache.releaseSharedSegment(text);
          if (c == '\n') {
            return -1;
          }
          biasRet[0] = Position.Bias.Backward;
        } else {
          biasRet[0] = Position.Bias.Forward;
        }
        return pos;
      default:
        throw new IllegalArgumentException("Bad direction: " + direction);
    }
    return pos;
  }