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Region_Delegate.javaAPI DocAndroid 5.1 API16012Thu Mar 12 22:22:44 GMT 2015android.graphics

Region_Delegate

public class Region_Delegate extends Object
Delegate implementing the native methods of android.graphics.Region Through the layoutlib_create tool, the original native methods of Region have been replaced by calls to methods of the same name in this delegate class. This class behaves like the original native implementation, but in Java, keeping previously native data into its own objects and mapping them to int that are sent back and forth between it and the original Region class. This also serve as a base class for all Region delegate classes.
see
DelegateManager

Fields Summary
protected static final com.android.layoutlib.bridge.impl.DelegateManager
sManager
private Area
mArea
Constructors Summary
Methods Summary
public static java.awt.geom.AreacombineShapes(java.awt.Shape shape1, java.awt.Shape shape2, int regionOp)
Combines two {@link Shape} into another one (actually an {@link Area}), according to the given {@link Region.Op}. If the Op is not one that combines two shapes, then this return null

param
shape1 the firt shape to combine which can be null if there's no original clip.
param
shape2 the 2nd shape to combine
param
regionOp the operande for the combine
return
a new area or null.

        if (regionOp == Region.Op.DIFFERENCE.nativeInt) {
            // if shape1 is null (empty), then the result is null.
            if (shape1 == null) {
                return null;
            }

            // result is always a new area.
            Area result = new Area(shape1);
            result.subtract(shape2 instanceof Area ? (Area) shape2 : new Area(shape2));
            return result;

        } else if (regionOp == Region.Op.INTERSECT.nativeInt) {
            // if shape1 is null, then the result is simply shape2.
            if (shape1 == null) {
                return new Area(shape2);
            }

            // result is always a new area.
            Area result = new Area(shape1);
            result.intersect(shape2 instanceof Area ? (Area) shape2 : new Area(shape2));
            return result;

        } else if (regionOp == Region.Op.UNION.nativeInt) {
            // if shape1 is null, then the result is simply shape2.
            if (shape1 == null) {
                return new Area(shape2);
            }

            // result is always a new area.
            Area result = new Area(shape1);
            result.add(shape2 instanceof Area ? (Area) shape2 : new Area(shape2));
            return result;

        } else if (regionOp == Region.Op.XOR.nativeInt) {
            // if shape1 is null, then the result is simply shape2
            if (shape1 == null) {
                return new Area(shape2);
            }

            // result is always a new area.
            Area result = new Area(shape1);
            result.exclusiveOr(shape2 instanceof Area ? (Area) shape2 : new Area(shape2));
            return result;

        } else if (regionOp == Region.Op.REVERSE_DIFFERENCE.nativeInt) {
            // result is always a new area.
            Area result = new Area(shape2);

            if (shape1 != null) {
                result.subtract(shape1 instanceof Area ? (Area) shape1 : new Area(shape1));
            }

            return result;
        }

        return null;
static booleancontains(Region thisRegion, int x, int y)

        Region_Delegate regionDelegate = sManager.getDelegate(thisRegion.mNativeRegion);
        if (regionDelegate == null) {
            return false;
        }

        return regionDelegate.mArea.contains(x, y);
public static android.graphics.Region_DelegategetDelegate(long nativeShader)


    // ---- Public Helper methods ----

         
        return sManager.getDelegate(nativeShader);
public java.awt.geom.AreagetJavaArea()

        return mArea;
static booleanisComplex(Region thisRegion)

        Region_Delegate regionDelegate = sManager.getDelegate(thisRegion.mNativeRegion);
        if (regionDelegate == null) {
            return true;
        }

        return regionDelegate.mArea.isSingular() == false;
static booleanisEmpty(Region thisRegion)

        Region_Delegate regionDelegate = sManager.getDelegate(thisRegion.mNativeRegion);
        if (regionDelegate == null) {
            return true;
        }

        return regionDelegate.mArea.isEmpty();
static booleanisRect(Region thisRegion)

        Region_Delegate regionDelegate = sManager.getDelegate(thisRegion.mNativeRegion);
        if (regionDelegate == null) {
            return true;
        }

        return regionDelegate.mArea.isRectangular();
static longnativeConstructor()

        Region_Delegate newDelegate = new Region_Delegate();
        return sManager.addNewDelegate(newDelegate);
static longnativeCreateFromParcel(android.os.Parcel p)

        // This is only called by Region.CREATOR (Parcelable.Creator<Region>), which is only
        // used during aidl call so really this should not be called.
        Bridge.getLog().error(LayoutLog.TAG_UNSUPPORTED,
                "AIDL is not suppored, and therefore Regions cannot be created from parcels.",
                null /*data*/);
        return 0;
static voidnativeDestructor(long native_region)

        sManager.removeJavaReferenceFor(native_region);
static booleannativeEquals(long native_r1, long native_r2)

        Region_Delegate region1 = sManager.getDelegate(native_r1);
        if (region1 == null) {
            return false;
        }

        Region_Delegate region2 = sManager.getDelegate(native_r2);
        if (region2 == null) {
            return false;
        }

        return region1.mArea.equals(region2.mArea);
static booleannativeGetBoundaryPath(long native_region, long native_path)

        Region_Delegate region = sManager.getDelegate(native_region);
        if (region == null) {
            return false;
        }

        Path_Delegate path = Path_Delegate.getDelegate(native_path);
        if (path == null) {
            return false;
        }

        if (region.mArea.isEmpty()) {
            path.reset();
            return false;
        }

        path.setPathIterator(region.mArea.getPathIterator(new AffineTransform()));
        return true;
static booleannativeGetBounds(long native_region, Rect rect)

        Region_Delegate region = sManager.getDelegate(native_region);
        if (region == null) {
            return true;
        }

        Rectangle bounds = region.mArea.getBounds();
        if (bounds.isEmpty()) {
            rect.left = rect.top = rect.right = rect.bottom = 0;
            return false;
        }

        rect.left = bounds.x;
        rect.top = bounds.y;
        rect.right = bounds.x + bounds.width;
        rect.bottom = bounds.y + bounds.height;
        return true;
static booleannativeOp(long native_dst, int left, int top, int right, int bottom, int op)

        Region_Delegate region = sManager.getDelegate(native_dst);
        if (region == null) {
            return false;
        }

        region.mArea = combineShapes(region.mArea,
                new Rectangle2D.Float(left, top, right - left, bottom - top), op);

        assert region.mArea != null;
        if (region.mArea != null) {
            region.mArea = new Area();
        }

        return region.mArea.getBounds().isEmpty() == false;
static booleannativeOp(long native_dst, Rect rect, long native_region, int op)

        Region_Delegate region = sManager.getDelegate(native_dst);
        if (region == null) {
            return false;
        }

        region.mArea = combineShapes(region.mArea,
                new Rectangle2D.Float(rect.left, rect.top, rect.width(), rect.height()), op);

        assert region.mArea != null;
        if (region.mArea != null) {
            region.mArea = new Area();
        }

        return region.mArea.getBounds().isEmpty() == false;
static booleannativeOp(long native_dst, long native_region1, long native_region2, int op)

        Region_Delegate dstRegion = sManager.getDelegate(native_dst);
        if (dstRegion == null) {
            return true;
        }

        Region_Delegate region1 = sManager.getDelegate(native_region1);
        if (region1 == null) {
            return false;
        }

        Region_Delegate region2 = sManager.getDelegate(native_region2);
        if (region2 == null) {
            return false;
        }

        dstRegion.mArea = combineShapes(region1.mArea, region2.mArea, op);

        assert dstRegion.mArea != null;
        if (dstRegion.mArea != null) {
            dstRegion.mArea = new Area();
        }

        return dstRegion.mArea.getBounds().isEmpty() == false;
static booleannativeSetPath(long native_dst, long native_path, long native_clip)

        Region_Delegate dstRegion = sManager.getDelegate(native_dst);
        if (dstRegion == null) {
            return true;
        }

        Path_Delegate path = Path_Delegate.getDelegate(native_path);
        if (path == null) {
            return true;
        }

        dstRegion.mArea = new Area(path.getJavaShape());

        Region_Delegate clip = sManager.getDelegate(native_clip);
        if (clip != null) {
            dstRegion.mArea.subtract(clip.getJavaArea());
        }

        return dstRegion.mArea.getBounds().isEmpty() == false;
static booleannativeSetRect(long native_dst, int left, int top, int right, int bottom)

        Region_Delegate dstRegion = sManager.getDelegate(native_dst);
        if (dstRegion == null) {
            return true;
        }

        dstRegion.mArea = new Area(new Rectangle2D.Float(left, top, right - left, bottom - top));
        return dstRegion.mArea.getBounds().isEmpty() == false;
static voidnativeSetRegion(long native_dst, long native_src)

        Region_Delegate dstRegion = sManager.getDelegate(native_dst);
        if (dstRegion == null) {
            return;
        }

        Region_Delegate srcRegion = sManager.getDelegate(native_src);
        if (srcRegion == null) {
            return;
        }

        dstRegion.mArea.reset();
        dstRegion.mArea.add(srcRegion.mArea);
static java.lang.StringnativeToString(long native_region)

        Region_Delegate region = sManager.getDelegate(native_region);
        if (region == null) {
            return "not found";
        }

        return region.mArea.toString();
static booleannativeWriteToParcel(long native_region, android.os.Parcel p)

        // This is only called when sending a region through aidl, so really this should not
        // be called.
        Bridge.getLog().error(LayoutLog.TAG_UNSUPPORTED,
                "AIDL is not suppored, and therefore Regions cannot be written to parcels.",
                null /*data*/);
        return false;
static booleanquickContains(Region thisRegion, int left, int top, int right, int bottom)

        Region_Delegate regionDelegate = sManager.getDelegate(thisRegion.mNativeRegion);
        if (regionDelegate == null) {
            return false;
        }

        return regionDelegate.mArea.isRectangular() &&
                regionDelegate.mArea.contains(left, top, right - left, bottom - top);
static booleanquickReject(Region thisRegion, Region rgn)

        Region_Delegate regionDelegate = sManager.getDelegate(thisRegion.mNativeRegion);
        if (regionDelegate == null) {
            return false;
        }

        Region_Delegate targetRegionDelegate = sManager.getDelegate(rgn.mNativeRegion);
        if (targetRegionDelegate == null) {
            return false;
        }

        return regionDelegate.mArea.isEmpty() ||
                regionDelegate.mArea.getBounds().intersects(
                        targetRegionDelegate.mArea.getBounds()) == false;
static booleanquickReject(Region thisRegion, int left, int top, int right, int bottom)

        Region_Delegate regionDelegate = sManager.getDelegate(thisRegion.mNativeRegion);
        if (regionDelegate == null) {
            return false;
        }

        return regionDelegate.mArea.isEmpty() ||
                regionDelegate.mArea.intersects(left, top, right - left, bottom - top) == false;
static voidscale(Region thisRegion, float scale, Region dst)

        Region_Delegate regionDelegate = sManager.getDelegate(thisRegion.mNativeRegion);
        if (regionDelegate == null) {
            return;
        }

        Region_Delegate targetRegionDelegate = sManager.getDelegate(dst.mNativeRegion);
        if (targetRegionDelegate == null) {
            return;
        }

        if (regionDelegate.mArea.isEmpty()) {
            targetRegionDelegate.mArea = new Area();
        } else {
            targetRegionDelegate.mArea = new Area(regionDelegate.mArea);
            AffineTransform mtx = new AffineTransform();
            mtx.scale(scale, scale);
            targetRegionDelegate.mArea.transform(mtx);
        }
static voidtranslate(Region thisRegion, int dx, int dy, Region dst)

        Region_Delegate regionDelegate = sManager.getDelegate(thisRegion.mNativeRegion);
        if (regionDelegate == null) {
            return;
        }

        Region_Delegate targetRegionDelegate = sManager.getDelegate(dst.mNativeRegion);
        if (targetRegionDelegate == null) {
            return;
        }

        if (regionDelegate.mArea.isEmpty()) {
            targetRegionDelegate.mArea = new Area();
        } else {
            targetRegionDelegate.mArea = new Area(regionDelegate.mArea);
            AffineTransform mtx = new AffineTransform();
            mtx.translate(dx, dy);
            targetRegionDelegate.mArea.transform(mtx);
        }