+++ /dev/null
-/*
- * Copyright (c) 2009, Takeyuki Nagao
- * All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or
- * without modification, are permitted provided that the
- * following conditions are met:
- *
- * * Redistributions of source code must retain the above
- * copyright notice, this list of conditions and the
- * following disclaimer.
- * * Redistributions in binary form must reproduce the above
- * copyright notice, this list of conditions and the
- * following disclaimer in the documentation and/or other
- * materials provided with the distribution.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
- * CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,
- * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
- * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
- * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
- * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
- * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
- * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
- * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
- * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
- * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
- * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE
- * USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
- * OF SUCH DAMAGE.
- */
-
-package jp.sourceforge.dvibrowser.dvicore;
-
-import java.awt.Rectangle;
-
-// immutable.
-
-public final class DviRect
-implements java.io.Serializable
-{
- private static final long serialVersionUID = 1112844763203879499L;
- public static final DviRect EMPTY = new DviRect();
- private final int x;
- private final int y;
- private final int width;
- private final int height;
-
- public DviRect() {
- this.x = 0;
- this.y = 0;
- this.width = 0;
- this.height = 0;
- }
-
- public DviRect(int x, int y, int width, int height) {
- if (width < 0) {
- this.x = x + width;
- this.width = -width;
- } else {
- this.x = x;
- this.width = width;
- }
- if (height < 0) {
- this.y = y + height;
- this.height = -height;
- } else {
- this.y = y;
- this.height = height;
- }
- }
-
- public DviRect(DviPoint p, int width, int height) {
- this(p.x, p.y, width, height);
- }
-
- public DviRect(DviPoint p, DviSize s) {
- this(p.x, p.y, s.width(), s.height());
- }
-
- public DviRect(int x, int y, DviSize s) {
- this(x, y, s.width(), s.height());
- }
-
- public DviRect(DviRect r) {
- this(r.x(), r.y(), r.width(), r.height());
- }
-
- public boolean isEmpty() {
- return width == 0 || height == 0;
- }
-
- public boolean contains(int x, int y) {
- return this.x <= x && x < this.x + width &&
- this.y <= y && y < this.y + height;
- }
-
- public boolean contains(DviPoint p) {
- return this.x <= p.x && p.x < this.x + width &&
- this.y <= p.y && p.y < this.y + height;
- }
-
- public DviSize size() {
- return new DviSize(width, height);
- }
-
- public DviRect shrink(int f) {
- if (f <= 0)
- throw new IllegalArgumentException("shrink factor can't be <= 0.");
-
- DviRect r = getDviRect(
- flooredDivision(x, f),
- flooredDivision(y, f),
- flooredDivision(right(), f),
- flooredDivision(bottom(), f));
-
- return r;
- }
-
- public DviRect magnify(int f) {
- return new DviRect(x * f, y * f, width * f, height * f);
- }
-
- public static DviRect getDviRect(int sx, int sy, int ex, int ey) {
- return new DviRect(sx, sy, ex - sx + 1, ey - sy + 1);
- }
-
- public DviRect translate(DviPoint p) {
- return new DviRect(x + p.x, y + p.y, width, height);
- }
- public DviRect translate(int dx, int dy) {
- return new DviRect(x + dx, y + dy, width, height);
- }
-
- public DviRect moveTo(int x, int y) {
- return new DviRect(x, y, width, height);
- }
-
- public DviRect crop(int top, int left, int bottom, int right)
- {
- return new DviRect(
- x + left,
- y + top,
- width - left - right,
- height - top - bottom
- );
- }
-
- public DviRect union(DviRect r) {
- if (r == null) r = EMPTY;
- if (isEmpty()) return r;
- if (r.isEmpty()) return this;
- int sx = Math.min(x, r.x);
- int sy = Math.min(y, r.y);
- int ex = Math.max(right(), r.right());
- int ey = Math.max(bottom(), r.bottom());
- return getDviRect(sx, sy, ex, ey);
- }
-
- public static DviRect union(DviRect [] rs) {
- DviRect ret = EMPTY;
- if (rs != null) {
- for (DviRect r : rs) {
- ret = ret.union(r);
- }
- }
- return ret;
- }
-
- public DviRect intersect(DviRect r) {
- int sx = Math.max(x, r.x);
- int sy = Math.max(y, r.y);
- int ex = Math.min(right(), r.right());
- int ey = Math.min(bottom(), r.bottom());
- return (sx <= ex && sy <= ey) ? getDviRect(sx, sy, ex, ey)
- : new DviRect();
- }
-
- public boolean intersects(DviRect r) {
- int sx = Math.max(x, r.x);
- int sy = Math.max(y, r.y);
- int ex = Math.min(right(), r.right());
- int ey = Math.min(bottom(), r.bottom());
- return (sx < ex && sy < ey);
- }
-
- public DviRect addPadding(int by) {
- if (isEmpty()) return this;
- return getDviRect(x - by, y - by, right() + by, bottom() + by);
- }
-
- private static int flooredDivision(final int a, final int b) {
- return (a < 0) ? (a - b + 1) / b : a / b;
- }
-
- public int x() { return x; }
- public int y() { return y; }
- public int width() { return width; }
- public int height() { return height; }
- public int left() { return x; }
- public int top() { return y; }
- public int right() { return x + width - 1; }
- public int bottom() { return y + height - 1; }
-
- public DviPoint topLeft() {
- return new DviPoint(x, y);
- }
- public DviPoint topRight() {
- return new DviPoint(x+width-1, y);
- }
- public DviPoint bottomLeft() {
- return new DviPoint(x, y+height-1);
- }
- public DviPoint bottomRight() {
- return new DviPoint(x+width-1, y+height-1);
- }
-
- public DviRect resize(int width, int height)
- {
- return new DviRect(this.x, this.y, width, height);
- }
-
- public int hashCode() {
- return (x + 33*(y + 33*(width + 33*height)));
- }
-
- public boolean equals(Object obj) {
- if (obj instanceof DviRect) {
- DviRect a = (DviRect) obj;
- return isEmpty() ? a.isEmpty() : (
- x == a.x && y == a.y &&
- width == a.width && height == a.height
- );
- } return false;
- }
-
- public String toString() {
- return getClass().getName()
- +"[x=" + x
- +",y=" + y
- +",width=" + width
- +",height=" + height
- +"]";
- }
-
- public Rectangle toRectangle()
- {
- return new Rectangle(x, y, width - 1, height - 1);
- }
-
- public static DviRect fromRectangle(Rectangle rect)
- {
- if (rect == null) return null;
- return new DviRect(rect.x, rect.y, rect.width + 1, rect.height + 1);
- }
-
- public DviRect magnify(double hScale, double vScale) {
- return new DviRect((int) (x * hScale + 0.5), (int) (y * vScale + 0.5), size().magnify(hScale, vScale));
- }
-
- public DviRect magnify(double scale) {
- return magnify(scale, scale);
- }
-
- public DviRect moveTo(DviPoint point) {
- if (point == null) throw new IllegalArgumentException("point can't be null");
- return moveTo(point.x, point.y);
- }
-}
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