LibGfx: Add missing FloatRect function implementations

These are just clones of the Rect equivalents.

Libraries/LibGfx/FloatRect.cpp

@@ -0,0 +1,135 @@
+/*
+ * Copyright (c) 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.
+ */
+
+#include <AK/StdLibExtras.h>
+#include <AK/String.h>
+#include <AK/Vector.h>
+#include <LibGfx/FloatRect.h>
+#include <LibIPC/Decoder.h>
+
+namespace Gfx {
+
+void FloatRect::intersect(const FloatRect& other)
+{
+    int l = max(left(), other.left());
+    int r = min(right(), other.right());
+    int t = max(top(), other.top());
+    int b = min(bottom(), other.bottom());
+
+    if (l > r || t > b) {
+        m_location = {};
+        m_size = {};
+        return;
+    }
+
+    m_location.set_x(l);
+    m_location.set_y(t);
+    m_size.set_width((r - l) + 1);
+    m_size.set_height((b - t) + 1);
+}
+
+FloatRect FloatRect::united(const FloatRect& other) const
+{
+    if (is_null())
+        return other;
+    if (other.is_null())
+        return *this;
+    FloatRect rect;
+    rect.set_left(min(left(), other.left()));
+    rect.set_top(min(top(), other.top()));
+    rect.set_right(max(right(), other.right()));
+    rect.set_bottom(max(bottom(), other.bottom()));
+    return rect;
+}
+
+Vector<FloatRect, 4> FloatRect::shatter(const FloatRect& hammer) const
+{
+    Vector<FloatRect, 4> pieces;
+    if (!intersects(hammer)) {
+        pieces.unchecked_append(*this);
+        return pieces;
+    }
+    FloatRect top_shard {
+        x(),
+        y(),
+        width(),
+        hammer.y() - y()
+    };
+    FloatRect bottom_shard {
+        x(),
+        hammer.y() + hammer.height(),
+        width(),
+        (y() + height()) - (hammer.y() + hammer.height())
+    };
+    FloatRect left_shard {
+        x(),
+        max(hammer.y(), y()),
+        hammer.x() - x(),
+        min((hammer.y() + hammer.height()), (y() + height())) - max(hammer.y(), y())
+    };
+    FloatRect right_shard {
+        hammer.x() + hammer.width(),
+        max(hammer.y(), y()),
+        right() - hammer.right(),
+        min((hammer.y() + hammer.height()), (y() + height())) - max(hammer.y(), y())
+    };
+    if (intersects(top_shard))
+        pieces.unchecked_append(top_shard);
+    if (intersects(bottom_shard))
+        pieces.unchecked_append(bottom_shard);
+    if (intersects(left_shard))
+        pieces.unchecked_append(left_shard);
+    if (intersects(right_shard))
+        pieces.unchecked_append(right_shard);
+
+    return pieces;
+}
+
+void FloatRect::align_within(const FloatRect& other, TextAlignment alignment)
+{
+    switch (alignment) {
+    case TextAlignment::Center:
+        center_within(other);
+        return;
+    case TextAlignment::TopLeft:
+        set_location(other.location());
+        return;
+    case TextAlignment::TopRight:
+        set_x(other.x() + other.width() - width());
+        set_y(other.y());
+        return;
+    case TextAlignment::CenterLeft:
+        set_x(other.x());
+        center_vertically_within(other);
+        return;
+    case TextAlignment::CenterRight:
+        set_x(other.x() + other.width() - width());
+        center_vertically_within(other);
+        return;
+    }
+}
+
+}

Libraries/LibGfx/Makefile

@@ -6,6 +6,7 @@ OBJS = \
     DisjointRectSet.o \
     Emoji.o \
     Font.o \
+    FloatRect.o \
     GIFLoader.o \
     ImageDecoder.o \
     PNGLoader.o \