1 files changed, 58 insertions, 0 deletions
diff --git a/Libraries/LibGfx/DisjointRectSet.h b/Libraries/LibGfx/DisjointRectSet.h
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+++ b/Libraries/LibGfx/DisjointRectSet.h
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+/*
+ * Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice, this
+ *    list of conditions and the following disclaimer.
+ *
+ * 2. 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.
+ */
+
+#pragma once
+
+#include <AK/Vector.h>
+#include <LibGfx/Rect.h>
+
+namespace Gfx {
+
+class DisjointRectSet {
+public:
+    DisjointRectSet() {}
+    ~DisjointRectSet() {}
+    DisjointRectSet(DisjointRectSet&& other)
+        : m_rects(move(other.m_rects))
+    {
+    }
+
+    void add(const Rect&);
+
+    bool is_empty() const { return m_rects.is_empty(); }
+    int size() const { return m_rects.size(); }
+
+    void clear() { m_rects.clear(); }
+    void clear_with_capacity() { m_rects.clear_with_capacity(); }
+    const Vector<Rect, 32>& rects() const { return m_rects; }
+
+private:
+    void shatter();
+
+    Vector<Rect, 32> m_rects;
+};
+
+}