Rectanglepublic class Rectangle extends Rectangle2D implements Shape, SerializableA Rectangle specifies an area in a coordinate space that is
enclosed by the Rectangle object's upper-left point
{@code (x,y)}
in the coordinate space, its width, and its height.
A Rectangle object's width and
height are public fields. The constructors
that create a Rectangle, and the methods that can modify
one, do not prevent setting a negative value for width or height.
A {@code Rectangle} whose width or height is exactly zero has location
along those axes with zero dimension, but is otherwise considered empty.
The {@link #isEmpty} method will return true for such a {@code Rectangle}.
Methods which test if an empty {@code Rectangle} contains or intersects
a point or rectangle will always return false if either dimension is zero.
Methods which combine such a {@code Rectangle} with a point or rectangle
will include the location of the {@code Rectangle} on that axis in the
result as if the {@link #add(Point)} method were being called.
A {@code Rectangle} whose width or height is negative has neither
location nor dimension along those axes with negative dimensions.
Such a {@code Rectangle} is treated as non-existant along those axes.
Such a {@code Rectangle} is also empty with respect to containment
calculations and methods which test if it contains or intersects a
point or rectangle will always return false.
Methods which combine such a {@code Rectangle} with a point or rectangle
will ignore the {@code Rectangle} entirely in generating the result.
If two {@code Rectangle} objects are combined and each has a negative
dimension, the result will have at least one negative dimension.
Methods which affect only the location of a {@code Rectangle} will
operate on its location regardless of whether or not it has a negative
or zero dimension along either axis.
Note that a {@code Rectangle} constructed with the default no-argument
constructor will have dimensions of {@code 0x0} and therefore be empty.
That {@code Rectangle} will still have a location of {@code (0,0)} and
will contribute that location to the union and add operations.
Code attempting to accumulate the bounds of a set of points should
therefore initially construct the {@code Rectangle} with a specifically
negative width and height or it should use the first point in the set
to construct the {@code Rectangle}.
For example:
Rectangle bounds = new Rectangle(0, 0, -1, -1);
for (int i = 0; i < points.length; i++) {
bounds.add(points[i]);
}
or if we know that the points array contains at least one point:
Rectangle bounds = new Rectangle(points[0]);
for (int i = 1; i < points.length; i++) {
bounds.add(points[i]);
}
This class uses 32-bit integers to store its location and dimensions.
Frequently operations may produce a result that exceeds the range of
a 32-bit integer.
The methods will calculate their results in a way that avoids any
32-bit overflow for intermediate results and then choose the best
representation to store the final results back into the 32-bit fields
which hold the location and dimensions.
The location of the result will be stored into the {@link #x} and
{@link #y} fields by clipping the true result to the nearest 32-bit value.
The values stored into the {@link #width} and {@link #height} dimension
fields will be chosen as the 32-bit values that encompass the largest
part of the true result as possible.
Generally this means that the dimension will be clipped independently
to the range of 32-bit integers except that if the location had to be
moved to store it into its pair of 32-bit fields then the dimensions
will be adjusted relative to the "best representation" of the location.
If the true result had a negative dimension and was therefore
non-existant along one or both axes, the stored dimensions will be
negative numbers in those axes.
If the true result had a location that could be represented within
the range of 32-bit integers, but zero dimension along one or both
axes, then the stored dimensions will be zero in those axes. |
| Fields Summary |
|---|
| public int | xThe X coordinate of the upper-left corner of the Rectangle. | | public int | yThe Y coordinate of the upper-left corner of the Rectangle. | | public int | widthThe width of the Rectangle. | | public int | heightThe height of the Rectangle. | | private static final long | serialVersionUID |
| Constructors Summary |
|---|
public Rectangle()Constructs a new Rectangle whose upper-left corner
is at (0, 0) in the coordinate space, and whose width and
height are both zero.
/* ensure that the necessary native libraries are loaded */
Toolkit.loadLibraries();
if (!GraphicsEnvironment.isHeadless()) {
initIDs();
}
this(0, 0, 0, 0);
| public Rectangle(Rectangle r)Constructs a new Rectangle, initialized to match
the values of the specified Rectangle.
this(r.x, r.y, r.width, r.height);
| public Rectangle(int x, int y, int width, int height)Constructs a new Rectangle whose upper-left corner is
specified as
{@code (x,y)} and whose width and height
are specified by the arguments of the same name.
this.x = x;
this.y = y;
this.width = width;
this.height = height;
| public Rectangle(int width, int height)Constructs a new Rectangle whose upper-left corner
is at (0, 0) in the coordinate space, and whose width and
height are specified by the arguments of the same name.
this(0, 0, width, height);
| public Rectangle(Point p, Dimension d)Constructs a new Rectangle whose upper-left corner is
specified by the {@link Point} argument, and
whose width and height are specified by the
{@link Dimension} argument.
this(p.x, p.y, d.width, d.height);
| public Rectangle(Point p)Constructs a new Rectangle whose upper-left corner is the
specified Point, and whose width and height are both zero.
this(p.x, p.y, 0, 0);
| public Rectangle(Dimension d)Constructs a new Rectangle whose top left corner is
(0, 0) and whose width and height are specified
by the Dimension argument.
this(0, 0, d.width, d.height);
|
| Methods Summary |
|---|
| public void | add(int newx, int newy)Adds a point, specified by the integer arguments {@code newx,newy}
to the bounds of this {@code Rectangle}.
If this {@code Rectangle} has any dimension less than zero,
the rules for non-existant
rectangles apply.
In that case, the new bounds of this {@code Rectangle} will
have a location equal to the specified coordinates and
width and height equal to zero.
After adding a point, a call to contains with the
added point as an argument does not necessarily return
true. The contains method does not
return true for points on the right or bottom
edges of a Rectangle. Therefore, if the added point
falls on the right or bottom edge of the enlarged
Rectangle, contains returns
false for that point.
If the specified point must be contained within the new
{@code Rectangle}, a 1x1 rectangle should be added instead:
r.add(newx, newy, 1, 1);
if ((width | height) < 0) {
this.x = newx;
this.y = newy;
this.width = this.height = 0;
return;
}
int x1 = this.x;
int y1 = this.y;
long x2 = this.width;
long y2 = this.height;
x2 += x1;
y2 += y1;
if (x1 > newx) x1 = newx;
if (y1 > newy) y1 = newy;
if (x2 < newx) x2 = newx;
if (y2 < newy) y2 = newy;
x2 -= x1;
y2 -= y1;
if (x2 > Integer.MAX_VALUE) x2 = Integer.MAX_VALUE;
if (y2 > Integer.MAX_VALUE) y2 = Integer.MAX_VALUE;
reshape(x1, y1, (int) x2, (int) y2);
| | public void | add(java.awt.Point pt)Adds the specified {@code Point} to the bounds of this
{@code Rectangle}.
If this {@code Rectangle} has any dimension less than zero,
the rules for non-existant
rectangles apply.
In that case, the new bounds of this {@code Rectangle} will
have a location equal to the coordinates of the specified
{@code Point} and width and height equal to zero.
After adding a Point, a call to contains
with the added Point as an argument does not
necessarily return true. The contains
method does not return true for points on the right
or bottom edges of a Rectangle. Therefore if the added
Point falls on the right or bottom edge of the
enlarged Rectangle, contains returns
false for that Point.
If the specified point must be contained within the new
{@code Rectangle}, a 1x1 rectangle should be added instead:
r.add(pt.x, pt.y, 1, 1);
add(pt.x, pt.y);
| | public void | add(java.awt.Rectangle r)Adds a Rectangle to this Rectangle.
The resulting Rectangle is the union of the two
rectangles.
If either {@code Rectangle} has any dimension less than 0, the
result will have the dimensions of the other {@code Rectangle}.
If both {@code Rectangle}s have at least one dimension less
than 0, the result will have at least one dimension less than 0.
If either {@code Rectangle} has one or both dimensions equal
to 0, the result along those axes with 0 dimensions will be
equivalent to the results obtained by adding the corresponding
origin coordinate to the result rectangle along that axis,
similar to the operation of the {@link #add(Point)} method,
but contribute no further dimension beyond that.
If the resulting {@code Rectangle} would have a dimension
too large to be expressed as an {@code int}, the result
will have a dimension of {@code Integer.MAX_VALUE} along
that dimension.
long tx2 = this.width;
long ty2 = this.height;
if ((tx2 | ty2) < 0) {
reshape(r.x, r.y, r.width, r.height);
}
long rx2 = r.width;
long ry2 = r.height;
if ((rx2 | ry2) < 0) {
return;
}
int tx1 = this.x;
int ty1 = this.y;
tx2 += tx1;
ty2 += ty1;
int rx1 = r.x;
int ry1 = r.y;
rx2 += rx1;
ry2 += ry1;
if (tx1 > rx1) tx1 = rx1;
if (ty1 > ry1) ty1 = ry1;
if (tx2 < rx2) tx2 = rx2;
if (ty2 < ry2) ty2 = ry2;
tx2 -= tx1;
ty2 -= ty1;
// tx2,ty2 will never underflow since both original
// rectangles were non-empty
// they might overflow, though...
if (tx2 > Integer.MAX_VALUE) tx2 = Integer.MAX_VALUE;
if (ty2 > Integer.MAX_VALUE) ty2 = Integer.MAX_VALUE;
reshape(tx1, ty1, (int) tx2, (int) ty2);
| | private static int | clip(double v, boolean doceil)
if (v <= Integer.MIN_VALUE) {
return Integer.MIN_VALUE;
}
if (v >= Integer.MAX_VALUE) {
return Integer.MAX_VALUE;
}
return (int) (doceil ? Math.ceil(v) : Math.floor(v));
| | public boolean | contains(java.awt.Point p)Checks whether or not this Rectangle contains the
specified Point.
return contains(p.x, p.y);
| | public boolean | contains(int x, int y)Checks whether or not this Rectangle contains the
point at the specified location {@code (x,y)}.
return inside(x, y);
| | public boolean | contains(java.awt.Rectangle r)Checks whether or not this Rectangle entirely contains
the specified Rectangle.
return contains(r.x, r.y, r.width, r.height);
| | public boolean | contains(int X, int Y, int W, int H)Checks whether this Rectangle entirely contains
the Rectangle
at the specified location {@code (X,Y)} with the
specified dimensions {@code (W,H)}.
int w = this.width;
int h = this.height;
if ((w | h | W | H) < 0) {
// At least one of the dimensions is negative...
return false;
}
// Note: if any dimension is zero, tests below must return false...
int x = this.x;
int y = this.y;
if (X < x || Y < y) {
return false;
}
w += x;
W += X;
if (W <= X) {
// X+W overflowed or W was zero, return false if...
// either original w or W was zero or
// x+w did not overflow or
// the overflowed x+w is smaller than the overflowed X+W
if (w >= x || W > w) return false;
} else {
// X+W did not overflow and W was not zero, return false if...
// original w was zero or
// x+w did not overflow and x+w is smaller than X+W
if (w >= x && W > w) return false;
}
h += y;
H += Y;
if (H <= Y) {
if (h >= y || H > h) return false;
} else {
if (h >= y && H > h) return false;
}
return true;
| | public java.awt.geom.Rectangle2D | createIntersection(java.awt.geom.Rectangle2D r){@inheritDoc}
if (r instanceof Rectangle) {
return intersection((Rectangle) r);
}
Rectangle2D dest = new Rectangle2D.Double();
Rectangle2D.intersect(this, r, dest);
return dest;
| | public java.awt.geom.Rectangle2D | createUnion(java.awt.geom.Rectangle2D r){@inheritDoc}
if (r instanceof Rectangle) {
return union((Rectangle) r);
}
Rectangle2D dest = new Rectangle2D.Double();
Rectangle2D.union(this, r, dest);
return dest;
| | public boolean | equals(java.lang.Object obj)Checks whether two rectangles are equal.
The result is true if and only if the argument is not
null and is a Rectangle object that has the
same upper-left corner, width, and height as
this Rectangle.
if (obj instanceof Rectangle) {
Rectangle r = (Rectangle)obj;
return ((x == r.x) &&
(y == r.y) &&
(width == r.width) &&
(height == r.height));
}
return super.equals(obj);
| | public java.awt.Rectangle | getBounds()Gets the bounding Rectangle of this Rectangle.
This method is included for completeness, to parallel the
getBounds method of
{@link Component}.
return new Rectangle(x, y, width, height);
| | public java.awt.geom.Rectangle2D | getBounds2D(){@inheritDoc}
return new Rectangle(x, y, width, height);
| | public double | getHeight()Returns the height of the bounding Rectangle in
double precision.
return height;
| | public java.awt.Point | getLocation()Returns the location of this Rectangle.
This method is included for completeness, to parallel the
getLocation method of Component.
return new Point(x, y);
| | public java.awt.Dimension | getSize()Gets the size of this Rectangle, represented by
the returned Dimension.
This method is included for completeness, to parallel the
getSize method of Component.
return new Dimension(width, height);
| | public double | getWidth()Returns the width of the bounding Rectangle in
double precision.
return width;
| | public double | getX()Returns the X coordinate of the bounding Rectangle in
double precision.
return x;
| | public double | getY()Returns the Y coordinate of the bounding Rectangle in
double precision.
return y;
| | public void | grow(int h, int v)Resizes the Rectangle both horizontally and vertically.
This method modifies the Rectangle so that it is
h units larger on both the left and right side,
and v units larger at both the top and bottom.
The new Rectangle has {@code (x - h, y - v)}
as its upper-left corner,
width of {@code (width + 2h)},
and a height of {@code (height + 2v)}.
If negative values are supplied for h and
v, the size of the Rectangle
decreases accordingly.
The {@code grow} method will check for integer overflow
and underflow, but does not check whether the resulting
values of {@code width} and {@code height} grow
from negative to non-negative or shrink from non-negative
to negative.
long x0 = this.x;
long y0 = this.y;
long x1 = this.width;
long y1 = this.height;
x1 += x0;
y1 += y0;
x0 -= h;
y0 -= v;
x1 += h;
y1 += v;
if (x1 < x0) {
// Non-existant in X direction
// Final width must remain negative so subtract x0 before
// it is clipped so that we avoid the risk that the clipping
// of x0 will reverse the ordering of x0 and x1.
x1 -= x0;
if (x1 < Integer.MIN_VALUE) x1 = Integer.MIN_VALUE;
if (x0 < Integer.MIN_VALUE) x0 = Integer.MIN_VALUE;
else if (x0 > Integer.MAX_VALUE) x0 = Integer.MAX_VALUE;
} else { // (x1 >= x0)
// Clip x0 before we subtract it from x1 in case the clipping
// affects the representable area of the rectangle.
if (x0 < Integer.MIN_VALUE) x0 = Integer.MIN_VALUE;
else if (x0 > Integer.MAX_VALUE) x0 = Integer.MAX_VALUE;
x1 -= x0;
// The only way x1 can be negative now is if we clipped
// x0 against MIN and x1 is less than MIN - in which case
// we want to leave the width negative since the result
// did not intersect the representable area.
if (x1 < Integer.MIN_VALUE) x1 = Integer.MIN_VALUE;
else if (x1 > Integer.MAX_VALUE) x1 = Integer.MAX_VALUE;
}
if (y1 < y0) {
// Non-existant in Y direction
y1 -= y0;
if (y1 < Integer.MIN_VALUE) y1 = Integer.MIN_VALUE;
if (y0 < Integer.MIN_VALUE) y0 = Integer.MIN_VALUE;
else if (y0 > Integer.MAX_VALUE) y0 = Integer.MAX_VALUE;
} else { // (y1 >= y0)
if (y0 < Integer.MIN_VALUE) y0 = Integer.MIN_VALUE;
else if (y0 > Integer.MAX_VALUE) y0 = Integer.MAX_VALUE;
y1 -= y0;
if (y1 < Integer.MIN_VALUE) y1 = Integer.MIN_VALUE;
else if (y1 > Integer.MAX_VALUE) y1 = Integer.MAX_VALUE;
}
reshape((int) x0, (int) y0, (int) x1, (int) y1);
| | private static native void | initIDs()Initialize JNI field and method IDs
| | public boolean | inside(int X, int Y)Checks whether or not this Rectangle contains the
point at the specified location {@code (X,Y)}.
int w = this.width;
int h = this.height;
if ((w | h) < 0) {
// At least one of the dimensions is negative...
return false;
}
// Note: if either dimension is zero, tests below must return false...
int x = this.x;
int y = this.y;
if (X < x || Y < y) {
return false;
}
w += x;
h += y;
// overflow || intersect
return ((w < x || w > X) &&
(h < y || h > Y));
| | public java.awt.Rectangle | intersection(java.awt.Rectangle r)Computes the intersection of this Rectangle with the
specified Rectangle. Returns a new Rectangle
that represents the intersection of the two rectangles.
If the two rectangles do not intersect, the result will be
an empty rectangle.
int tx1 = this.x;
int ty1 = this.y;
int rx1 = r.x;
int ry1 = r.y;
long tx2 = tx1; tx2 += this.width;
long ty2 = ty1; ty2 += this.height;
long rx2 = rx1; rx2 += r.width;
long ry2 = ry1; ry2 += r.height;
if (tx1 < rx1) tx1 = rx1;
if (ty1 < ry1) ty1 = ry1;
if (tx2 > rx2) tx2 = rx2;
if (ty2 > ry2) ty2 = ry2;
tx2 -= tx1;
ty2 -= ty1;
// tx2,ty2 will never overflow (they will never be
// larger than the smallest of the two source w,h)
// they might underflow, though...
if (tx2 < Integer.MIN_VALUE) tx2 = Integer.MIN_VALUE;
if (ty2 < Integer.MIN_VALUE) ty2 = Integer.MIN_VALUE;
return new Rectangle(tx1, ty1, (int) tx2, (int) ty2);
| | public boolean | intersects(java.awt.Rectangle r)Determines whether or not this Rectangle and the specified
Rectangle intersect. Two rectangles intersect if
their intersection is nonempty.
int tw = this.width;
int th = this.height;
int rw = r.width;
int rh = r.height;
if (rw <= 0 || rh <= 0 || tw <= 0 || th <= 0) {
return false;
}
int tx = this.x;
int ty = this.y;
int rx = r.x;
int ry = r.y;
rw += rx;
rh += ry;
tw += tx;
th += ty;
// overflow || intersect
return ((rw < rx || rw > tx) &&
(rh < ry || rh > ty) &&
(tw < tx || tw > rx) &&
(th < ty || th > ry));
| | public boolean | isEmpty(){@inheritDoc}
return (width <= 0) || (height <= 0);
| | public void | move(int x, int y)Moves this Rectangle to the specified location.
this.x = x;
this.y = y;
| | public int | outcode(double x, double y){@inheritDoc}
/*
* Note on casts to double below. If the arithmetic of
* x+w or y+h is done in int, then we may get integer
* overflow. By converting to double before the addition
* we force the addition to be carried out in double to
* avoid overflow in the comparison.
*
* See bug 4320890 for problems that this can cause.
*/
int out = 0;
if (this.width <= 0) {
out |= OUT_LEFT | OUT_RIGHT;
} else if (x < this.x) {
out |= OUT_LEFT;
} else if (x > this.x + (double) this.width) {
out |= OUT_RIGHT;
}
if (this.height <= 0) {
out |= OUT_TOP | OUT_BOTTOM;
} else if (y < this.y) {
out |= OUT_TOP;
} else if (y > this.y + (double) this.height) {
out |= OUT_BOTTOM;
}
return out;
| | public void | reshape(int x, int y, int width, int height)Sets the bounding Rectangle of this
Rectangle to the specified
x, y, width,
and height.
this.x = x;
this.y = y;
this.width = width;
this.height = height;
| | public void | resize(int width, int height)Sets the size of this Rectangle to the specified
width and height.
this.width = width;
this.height = height;
| | public void | setBounds(java.awt.Rectangle r)Sets the bounding Rectangle of this Rectangle
to match the specified Rectangle.
This method is included for completeness, to parallel the
setBounds method of Component.
setBounds(r.x, r.y, r.width, r.height);
| | public void | setBounds(int x, int y, int width, int height)Sets the bounding Rectangle of this
Rectangle to the specified
x, y, width,
and height.
This method is included for completeness, to parallel the
setBounds method of Component.
reshape(x, y, width, height);
| | public void | setLocation(java.awt.Point p)Moves this Rectangle to the specified location.
This method is included for completeness, to parallel the
setLocation method of Component.
setLocation(p.x, p.y);
| | public void | setLocation(int x, int y)Moves this Rectangle to the specified location.
This method is included for completeness, to parallel the
setLocation method of Component.
move(x, y);
| | public void | setRect(double x, double y, double width, double height)Sets the bounds of this {@code Rectangle} to the integer bounds
which encompass the specified {@code x}, {@code y}, {@code width},
and {@code height}.
If the parameters specify a {@code Rectangle} that exceeds the
maximum range of integers, the result will be the best
representation of the specified {@code Rectangle} intersected
with the maximum integer bounds.
int newx, newy, neww, newh;
if (x > 2.0 * Integer.MAX_VALUE) {
// Too far in positive X direction to represent...
// We cannot even reach the left side of the specified
// rectangle even with both x & width set to MAX_VALUE.
// The intersection with the "maximal integer rectangle"
// is non-existant so we should use a width < 0.
// REMIND: Should we try to determine a more "meaningful"
// adjusted value for neww than just "-1"?
newx = Integer.MAX_VALUE;
neww = -1;
} else {
newx = clip(x, false);
if (width >= 0) width += x-newx;
neww = clip(width, width >= 0);
}
if (y > 2.0 * Integer.MAX_VALUE) {
// Too far in positive Y direction to represent...
newy = Integer.MAX_VALUE;
newh = -1;
} else {
newy = clip(y, false);
if (height >= 0) height += y-newy;
newh = clip(height, height >= 0);
}
reshape(newx, newy, neww, newh);
| | public void | setSize(java.awt.Dimension d)Sets the size of this Rectangle to match the
specified Dimension.
This method is included for completeness, to parallel the
setSize method of Component.
setSize(d.width, d.height);
| | public void | setSize(int width, int height)Sets the size of this Rectangle to the specified
width and height.
This method is included for completeness, to parallel the
setSize method of Component.
resize(width, height);
| | public java.lang.String | toString()Returns a String representing this
Rectangle and its values.
return getClass().getName() + "[x=" + x + ",y=" + y + ",width=" + width + ",height=" + height + "]";
| | public void | translate(int dx, int dy)Translates this Rectangle the indicated distance,
to the right along the X coordinate axis, and
downward along the Y coordinate axis.
int oldv = this.x;
int newv = oldv + dx;
if (dx < 0) {
// moving leftward
if (newv > oldv) {
// negative overflow
// Only adjust width if it was valid (>= 0).
if (width >= 0) {
// The right edge is now conceptually at
// newv+width, but we may move newv to prevent
// overflow. But we want the right edge to
// remain at its new location in spite of the
// clipping. Think of the following adjustment
// conceptually the same as:
// width += newv; newv = MIN_VALUE; width -= newv;
width += newv - Integer.MIN_VALUE;
// width may go negative if the right edge went past
// MIN_VALUE, but it cannot overflow since it cannot
// have moved more than MIN_VALUE and any non-negative
// number + MIN_VALUE does not overflow.
}
newv = Integer.MIN_VALUE;
}
} else {
// moving rightward (or staying still)
if (newv < oldv) {
// positive overflow
if (width >= 0) {
// Conceptually the same as:
// width += newv; newv = MAX_VALUE; width -= newv;
width += newv - Integer.MAX_VALUE;
// With large widths and large displacements
// we may overflow so we need to check it.
if (width < 0) width = Integer.MAX_VALUE;
}
newv = Integer.MAX_VALUE;
}
}
this.x = newv;
oldv = this.y;
newv = oldv + dy;
if (dy < 0) {
// moving upward
if (newv > oldv) {
// negative overflow
if (height >= 0) {
height += newv - Integer.MIN_VALUE;
// See above comment about no overflow in this case
}
newv = Integer.MIN_VALUE;
}
} else {
// moving downward (or staying still)
if (newv < oldv) {
// positive overflow
if (height >= 0) {
height += newv - Integer.MAX_VALUE;
if (height < 0) height = Integer.MAX_VALUE;
}
newv = Integer.MAX_VALUE;
}
}
this.y = newv;
| | public java.awt.Rectangle | union(java.awt.Rectangle r)Computes the union of this Rectangle with the
specified Rectangle. Returns a new
Rectangle that
represents the union of the two rectangles.
If either {@code Rectangle} has any dimension less than zero
the rules for non-existant rectangles
apply.
If only one has a dimension less than zero, then the result
will be a copy of the other {@code Rectangle}.
If both have dimension less than zero, then the result will
have at least one dimension less than zero.
If the resulting {@code Rectangle} would have a dimension
too large to be expressed as an {@code int}, the result
will have a dimension of {@code Integer.MAX_VALUE} along
that dimension.
long tx2 = this.width;
long ty2 = this.height;
if ((tx2 | ty2) < 0) {
// This rectangle has negative dimensions...
// If r has non-negative dimensions then it is the answer.
// If r is non-existant (has a negative dimension), then both
// are non-existant and we can return any non-existant rectangle
// as an answer. Thus, returning r meets that criterion.
// Either way, r is our answer.
return new Rectangle(r);
}
long rx2 = r.width;
long ry2 = r.height;
if ((rx2 | ry2) < 0) {
return new Rectangle(this);
}
int tx1 = this.x;
int ty1 = this.y;
tx2 += tx1;
ty2 += ty1;
int rx1 = r.x;
int ry1 = r.y;
rx2 += rx1;
ry2 += ry1;
if (tx1 > rx1) tx1 = rx1;
if (ty1 > ry1) ty1 = ry1;
if (tx2 < rx2) tx2 = rx2;
if (ty2 < ry2) ty2 = ry2;
tx2 -= tx1;
ty2 -= ty1;
// tx2,ty2 will never underflow since both original rectangles
// were already proven to be non-empty
// they might overflow, though...
if (tx2 > Integer.MAX_VALUE) tx2 = Integer.MAX_VALUE;
if (ty2 > Integer.MAX_VALUE) ty2 = Integer.MAX_VALUE;
return new Rectangle(tx1, ty1, (int) tx2, (int) ty2);
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