1 files changed, 110 insertions, 0 deletions
diff --git a/android/source/src/java/org/mozilla/gecko/gfx/RectUtils.java b/android/source/src/java/org/mozilla/gecko/gfx/RectUtils.java
new file mode 100644
index 000000000..e7fa540a3
--- /dev/null
+++ b/android/source/src/java/org/mozilla/gecko/gfx/RectUtils.java
@@ -0,0 +1,110 @@
+/* -*- Mode: Java; c-basic-offset: 4; tab-width: 20; indent-tabs-mode: nil; -*-
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+package org.mozilla.gecko.gfx;
+
+import android.graphics.Point;
+import android.graphics.PointF;
+import android.graphics.Rect;
+import android.graphics.RectF;
+
+import org.mozilla.gecko.util.FloatUtils;
+
+public final class RectUtils {
+    private RectUtils() {}
+
+    public static RectF expand(RectF rect, float moreWidth, float moreHeight) {
+        float halfMoreWidth = moreWidth / 2;
+        float halfMoreHeight = moreHeight / 2;
+        return new RectF(rect.left - halfMoreWidth,
+                         rect.top - halfMoreHeight,
+                         rect.right + halfMoreWidth,
+                         rect.bottom + halfMoreHeight);
+    }
+
+    public static RectF contract(RectF rect, float lessWidth, float lessHeight) {
+        float halfLessWidth = lessWidth / 2.0f;
+        float halfLessHeight = lessHeight / 2.0f;
+        return new RectF(rect.left + halfLessWidth,
+                         rect.top + halfLessHeight,
+                         rect.right - halfLessWidth,
+                         rect.bottom - halfLessHeight);
+    }
+
+    public static RectF intersect(RectF one, RectF two) {
+        float left = Math.max(one.left, two.left);
+        float top = Math.max(one.top, two.top);
+        float right = Math.min(one.right, two.right);
+        float bottom = Math.min(one.bottom, two.bottom);
+        return new RectF(left, top, Math.max(right, left), Math.max(bottom, top));
+    }
+
+    public static RectF scale(RectF rect, float scale) {
+        float x = rect.left * scale;
+        float y = rect.top * scale;
+        return new RectF(x, y,
+                         x + (rect.width() * scale),
+                         y + (rect.height() * scale));
+    }
+
+    public static RectF inverseScale(RectF rect, float scale) {
+        float x = rect.left / scale;
+        float y = rect.top / scale;
+        return new RectF(x, y,
+                x + (rect.width() / scale),
+                y + (rect.height() / scale));
+    }
+
+    /** Returns the nearest integer rect of the given rect. */
+    public static Rect round(RectF rect) {
+        Rect r = new Rect();
+        round(rect, r);
+        return r;
+    }
+
+    public static void round(RectF rect, Rect dest) {
+        dest.set(Math.round(rect.left), Math.round(rect.top),
+                 Math.round(rect.right), Math.round(rect.bottom));
+    }
+
+    public static Rect roundIn(RectF rect) {
+        return new Rect((int)Math.ceil(rect.left), (int)Math.ceil(rect.top),
+                        (int)Math.floor(rect.right), (int)Math.floor(rect.bottom));
+    }
+
+    public static IntSize getSize(Rect rect) {
+        return new IntSize(rect.width(), rect.height());
+    }
+
+    public static Point getOrigin(Rect rect) {
+        return new Point(rect.left, rect.top);
+    }
+
+    public static PointF getOrigin(RectF rect) {
+        return new PointF(rect.left, rect.top);
+    }
+
+    public static boolean fuzzyEquals(RectF a, RectF b) {
+        if (a == null && b == null)
+            return true;
+        else
+            return a != null && b != null
+                && FloatUtils.fuzzyEquals(a.top, b.top)
+                && FloatUtils.fuzzyEquals(a.left, b.left)
+                && FloatUtils.fuzzyEquals(a.right, b.right)
+                && FloatUtils.fuzzyEquals(a.bottom, b.bottom);
+    }
+
+    /**
+     * Assign rectangle values from source to target.
+     */
+    public static void assign(final RectF target, final RectF source)
+    {
+        target.left = source.left;
+        target.top = source.top;
+        target.right = source.right;
+        target.bottom = source.bottom;
+    }
+}