diff options
Diffstat (limited to 'libjava/classpath/javax/swing/text/CompositeView.java')
| -rw-r--r-- | libjava/classpath/javax/swing/text/CompositeView.java | 195 |
1 files changed, 94 insertions, 101 deletions
diff --git a/libjava/classpath/javax/swing/text/CompositeView.java b/libjava/classpath/javax/swing/text/CompositeView.java index 6f487b8981e..570fc955c88 100644 --- a/libjava/classpath/javax/swing/text/CompositeView.java +++ b/libjava/classpath/javax/swing/text/CompositeView.java @@ -38,7 +38,6 @@ exception statement from your version. */ package javax.swing.text; -import java.awt.Insets; import java.awt.Rectangle; import java.awt.Shape; @@ -57,20 +56,28 @@ public abstract class CompositeView /** * The child views of this <code>CompositeView</code>. */ - View[] children; + private View[] children; + + /** + * The number of child views. + */ + private int numChildren; /** * The allocation of this <code>View</code> minus its insets. This is * initialized in {@link #getInsideAllocation} and reused and modified in * {@link #childAllocation(int, Rectangle)}. */ - Rectangle insideAllocation; + private final Rectangle insideAllocation = new Rectangle(); /** * The insets of this <code>CompositeView</code>. This is initialized * in {@link #setInsets}. */ - Insets insets; + private short top; + private short bottom; + private short left; + private short right; /** * Creates a new <code>CompositeView</code> for the given @@ -82,7 +89,10 @@ public abstract class CompositeView { super(element); children = new View[0]; - insets = new Insets(0, 0, 0, 0); + top = 0; + bottom = 0; + left = 0; + right = 0; } /** @@ -96,16 +106,22 @@ public abstract class CompositeView */ protected void loadChildren(ViewFactory f) { - Element el = getElement(); - int count = el.getElementCount(); - View[] newChildren = new View[count]; - for (int i = 0; i < count; ++i) + if (f != null) { - Element child = el.getElement(i); - View view = f.create(child); - newChildren[i] = view; + Element el = getElement(); + int count = el.getElementCount(); + View[] newChildren = new View[count]; + for (int i = 0; i < count; ++i) + { + Element child = el.getElement(i); + View view = f.create(child); + newChildren[i] = view; + } + // I'd have called replace(0, getViewCount(), newChildren) here + // in order to replace all existing views. However according to + // Harmony's tests this is not what the RI does. + replace(0, 0, newChildren); } - replace(0, getViewCount(), newChildren); } /** @@ -118,7 +134,7 @@ public abstract class CompositeView public void setParent(View parent) { super.setParent(parent); - if (parent != null && ((children == null) || children.length == 0)) + if (parent != null && numChildren == 0) loadChildren(getViewFactory()); } @@ -129,7 +145,7 @@ public abstract class CompositeView */ public int getViewCount() { - return children.length; + return numChildren; } /** @@ -156,24 +172,42 @@ public abstract class CompositeView */ public void replace(int offset, int length, View[] views) { - // Check for null views to add. - for (int i = 0; i < views.length; ++i) - if (views[i] == null) - throw new NullPointerException("Added views must not be null"); - - int endOffset = offset + length; + // Make sure we have an array. The Harmony testsuite indicates that we + // have to do something like this. + if (views == null) + views = new View[0]; // First we set the parent of the removed children to null. + int endOffset = offset + length; for (int i = offset; i < endOffset; ++i) - children[i].setParent(null); + { + if (children[i].getParent() == this) + children[i].setParent(null); + children[i] = null; + } - View[] newChildren = new View[children.length - length + views.length]; - System.arraycopy(children, 0, newChildren, 0, offset); - System.arraycopy(views, 0, newChildren, offset, views.length); - System.arraycopy(children, offset + length, newChildren, - offset + views.length, - children.length - (offset + length)); - children = newChildren; + // Update the children array. + int delta = views.length - length; + int src = offset + length; + int numMove = numChildren - src; + int dst = src + delta; + if (numChildren + delta > children.length) + { + // Grow array. + int newLength = Math.max(2 * children.length, numChildren + delta); + View[] newChildren = new View[newLength]; + System.arraycopy(children, 0, newChildren, 0, offset); + System.arraycopy(views, 0, newChildren, offset, views.length); + System.arraycopy(children, src, newChildren, dst, numMove); + children = newChildren; + } + else + { + // Patch existing array. + System.arraycopy(children, src, children, dst, numMove); + System.arraycopy(views, 0, children, offset, views.length); + } + numChildren += delta; // Finally we set the parent of the added children to this. for (int i = 0; i < views.length; ++i) @@ -248,34 +282,13 @@ public abstract class CompositeView } } } - else - { - throw new BadLocationException("Position " + pos - + " is not represented by view.", pos); - } } - return ret; - } - /** - * A helper method for {@link #modelToView(int, Position.Bias, int, - * Position.Bias, Shape)}. This creates a default location when there is - * no child view that can take responsibility for mapping the position to - * view coordinates. Depending on the specified bias this will be the - * left or right edge of this view's allocation. - * - * @param a the allocation for this view - * @param bias the bias - * - * @return a default location - */ - private Shape createDefaultLocation(Shape a, Position.Bias bias) - { - Rectangle alloc = a.getBounds(); - Rectangle location = new Rectangle(alloc.x, alloc.y, 1, alloc.height); - if (bias == Position.Bias.Forward) - location.x = alloc.x + alloc.width; - return location; + if (ret == null) + throw new BadLocationException("Position " + pos + + " is not represented by view.", pos); + + return ret; } /** @@ -394,7 +407,7 @@ public abstract class CompositeView */ public int getViewIndex(int pos, Position.Bias b) { - if (b == Position.Bias.Backward && pos != 0) + if (b == Position.Bias.Backward) pos -= 1; int i = -1; if (pos >= getStartOffset() && pos < getEndOffset()) @@ -514,24 +527,17 @@ public abstract class CompositeView if (a == null) return null; - Rectangle alloc = a.getBounds(); + // Try to avoid allocation of Rectangle here. + Rectangle alloc = a instanceof Rectangle ? (Rectangle) a : a.getBounds(); + // Initialize the inside allocation rectangle. This is done inside // a synchronized block in order to avoid multiple threads creating // this instance simultanously. - Rectangle inside; - synchronized(this) - { - inside = insideAllocation; - if (inside == null) - { - inside = new Rectangle(); - insideAllocation = inside; - } - } - inside.x = alloc.x + insets.left; - inside.y = alloc.y + insets.top; - inside.width = alloc.width - insets.left - insets.right; - inside.height = alloc.height - insets.top - insets.bottom; + Rectangle inside = insideAllocation; + inside.x = alloc.x + getLeftInset(); + inside.y = alloc.y + getTopInset(); + inside.width = alloc.width - getLeftInset() - getRightInset(); + inside.height = alloc.height - getTopInset() - getBottomInset(); return inside; } @@ -546,39 +552,26 @@ public abstract class CompositeView */ protected void setParagraphInsets(AttributeSet attributes) { - Float l = (Float) attributes.getAttribute(StyleConstants.LeftIndent); - short left = 0; - if (l != null) - left = l.shortValue(); - Float r = (Float) attributes.getAttribute(StyleConstants.RightIndent); - short right = 0; - if (r != null) - right = r.shortValue(); - Float t = (Float) attributes.getAttribute(StyleConstants.SpaceAbove); - short top = 0; - if (t != null) - top = t.shortValue(); - Float b = (Float) attributes.getAttribute(StyleConstants.SpaceBelow); - short bottom = 0; - if (b != null) - bottom = b.shortValue(); - setInsets(top, left, bottom, right); + top = (short) StyleConstants.getSpaceAbove(attributes); + bottom = (short) StyleConstants.getSpaceBelow(attributes); + left = (short) StyleConstants.getLeftIndent(attributes); + right = (short) StyleConstants.getRightIndent(attributes); } /** * Sets the insets of this <code>CompositeView</code>. * - * @param top the top inset - * @param left the left inset - * @param bottom the bottom inset - * @param right the right inset + * @param t the top inset + * @param l the left inset + * @param b the bottom inset + * @param r the right inset */ - protected void setInsets(short top, short left, short bottom, short right) + protected void setInsets(short t, short l, short b, short r) { - insets.top = top; - insets.left = left; - insets.bottom = bottom; - insets.right = right; + top = t; + left = l; + bottom = b; + right = r; } /** @@ -588,7 +581,7 @@ public abstract class CompositeView */ protected short getLeftInset() { - return (short) insets.left; + return left; } /** @@ -598,7 +591,7 @@ public abstract class CompositeView */ protected short getRightInset() { - return (short) insets.right; + return right; } /** @@ -608,7 +601,7 @@ public abstract class CompositeView */ protected short getTopInset() { - return (short) insets.top; + return top; } /** @@ -618,7 +611,7 @@ public abstract class CompositeView */ protected short getBottomInset() { - return (short) insets.bottom; + return bottom; } /** |