| /* |
| * Copyright (c) 2012, Google Inc. 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. |
| * * Neither the name of Google Inc. nor the names of its |
| * contributors may be used to endorse or promote products derived from |
| * this software without specific prior written permission. |
| * |
| * 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 |
| * OWNER 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. |
| */ |
| |
| #ifndef SKY_ENGINE_PLATFORM_GEOMETRY_LAYOUTRECT_H_ |
| #define SKY_ENGINE_PLATFORM_GEOMETRY_LAYOUTRECT_H_ |
| |
| #include "sky/engine/platform/geometry/IntRect.h" |
| #include "sky/engine/platform/geometry/LayoutBoxExtent.h" |
| #include "sky/engine/platform/geometry/LayoutPoint.h" |
| #include "sky/engine/wtf/Vector.h" |
| |
| namespace blink { |
| |
| class FloatRect; |
| |
| class PLATFORM_EXPORT LayoutRect { |
| public: |
| LayoutRect() { } |
| LayoutRect(const LayoutPoint& location, const LayoutSize& size) |
| : m_location(location), m_size(size) { } |
| LayoutRect(LayoutUnit x, LayoutUnit y, LayoutUnit width, LayoutUnit height) |
| : m_location(LayoutPoint(x, y)), m_size(LayoutSize(width, height)) { } |
| LayoutRect(const FloatPoint& location, const FloatSize& size) |
| : m_location(location), m_size(size) { } |
| LayoutRect(const IntRect& rect) : m_location(rect.location()), m_size(rect.size()) { } |
| |
| explicit LayoutRect(const FloatRect&); // don't do this implicitly since it's lossy |
| |
| LayoutPoint location() const { return m_location; } |
| LayoutSize size() const { return m_size; } |
| |
| IntPoint pixelSnappedLocation() const { return roundedIntPoint(m_location); } |
| IntSize pixelSnappedSize() const { return IntSize(snapSizeToPixel(m_size.width(), m_location.x()), snapSizeToPixel(m_size.height(), m_location.y())); } |
| |
| void setLocation(const LayoutPoint& location) { m_location = location; } |
| void setSize(const LayoutSize& size) { m_size = size; } |
| |
| ALWAYS_INLINE LayoutUnit x() const { return m_location.x(); } |
| ALWAYS_INLINE LayoutUnit y() const { return m_location.y(); } |
| ALWAYS_INLINE LayoutUnit maxX() const { return x() + width(); } |
| ALWAYS_INLINE LayoutUnit maxY() const { return y() + height(); } |
| LayoutUnit width() const { return m_size.width(); } |
| LayoutUnit height() const { return m_size.height(); } |
| |
| int pixelSnappedX() const { return x().round(); } |
| int pixelSnappedY() const { return y().round(); } |
| int pixelSnappedWidth() const { return snapSizeToPixel(width(), x()); } |
| int pixelSnappedHeight() const { return snapSizeToPixel(height(), y()); } |
| int pixelSnappedMaxX() const { return (m_location.x() + m_size.width()).round(); } |
| int pixelSnappedMaxY() const { return (m_location.y() + m_size.height()).round(); } |
| |
| void setX(LayoutUnit x) { m_location.setX(x); } |
| void setY(LayoutUnit y) { m_location.setY(y); } |
| void setWidth(LayoutUnit width) { m_size.setWidth(width); } |
| void setHeight(LayoutUnit height) { m_size.setHeight(height); } |
| |
| ALWAYS_INLINE bool isEmpty() const { return m_size.isEmpty(); } |
| |
| // NOTE: The result is rounded to integer values, and thus may be not the exact |
| // center point. |
| LayoutPoint center() const { return LayoutPoint(x() + width() / 2, y() + height() / 2); } |
| |
| void move(const LayoutSize& size) { m_location += size; } |
| void moveBy(const LayoutPoint& offset) { m_location.move(offset.x(), offset.y()); } |
| void move(LayoutUnit dx, LayoutUnit dy) { m_location.move(dx, dy); } |
| |
| void expand(const LayoutSize& size) { m_size += size; } |
| void expand(const LayoutBoxExtent& box) |
| { |
| m_location.move(-box.left(), -box.top()); |
| m_size.expand(box.left() + box.right(), box.top() + box.bottom()); |
| } |
| void expand(LayoutUnit dw, LayoutUnit dh) { m_size.expand(dw, dh); } |
| void contract(const LayoutSize& size) { m_size -= size; } |
| void contract(const LayoutBoxExtent& box) |
| { |
| m_location.move(box.left(), box.top()); |
| m_size.shrink(box.left() + box.right(), box.top() + box.bottom()); |
| } |
| void contract(LayoutUnit dw, LayoutUnit dh) { m_size.expand(-dw, -dh); } |
| |
| void shiftXEdgeTo(LayoutUnit edge) |
| { |
| LayoutUnit delta = edge - x(); |
| setX(edge); |
| setWidth(std::max<LayoutUnit>(0, width() - delta)); |
| } |
| void shiftMaxXEdgeTo(LayoutUnit edge) |
| { |
| LayoutUnit delta = edge - maxX(); |
| setWidth(std::max<LayoutUnit>(0, width() + delta)); |
| } |
| void shiftYEdgeTo(LayoutUnit edge) |
| { |
| LayoutUnit delta = edge - y(); |
| setY(edge); |
| setHeight(std::max<LayoutUnit>(0, height() - delta)); |
| } |
| void shiftMaxYEdgeTo(LayoutUnit edge) |
| { |
| LayoutUnit delta = edge - maxY(); |
| setHeight(std::max<LayoutUnit>(0, height() + delta)); |
| } |
| |
| LayoutPoint minXMinYCorner() const { return m_location; } // typically topLeft |
| LayoutPoint maxXMinYCorner() const { return LayoutPoint(m_location.x() + m_size.width(), m_location.y()); } // typically topRight |
| LayoutPoint minXMaxYCorner() const { return LayoutPoint(m_location.x(), m_location.y() + m_size.height()); } // typically bottomLeft |
| LayoutPoint maxXMaxYCorner() const { return LayoutPoint(m_location.x() + m_size.width(), m_location.y() + m_size.height()); } // typically bottomRight |
| |
| bool intersects(const LayoutRect&) const; |
| bool contains(const LayoutRect&) const; |
| |
| // This checks to see if the rect contains x,y in the traditional sense. |
| // Equivalent to checking if the rect contains a 1x1 rect below and to the right of (px,py). |
| bool contains(LayoutUnit px, LayoutUnit py) const |
| { return px >= x() && px < maxX() && py >= y() && py < maxY(); } |
| bool contains(const LayoutPoint& point) const { return contains(point.x(), point.y()); } |
| |
| void intersect(const LayoutRect&); |
| void unite(const LayoutRect&); |
| void uniteIfNonZero(const LayoutRect&); |
| |
| void inflateX(LayoutUnit dx) |
| { |
| m_location.setX(m_location.x() - dx); |
| m_size.setWidth(m_size.width() + dx + dx); |
| } |
| void inflateY(LayoutUnit dy) |
| { |
| m_location.setY(m_location.y() - dy); |
| m_size.setHeight(m_size.height() + dy + dy); |
| } |
| void inflate(LayoutUnit d) { inflateX(d); inflateY(d); } |
| void scale(float s); |
| void scale(float xAxisScale, float yAxisScale); |
| |
| LayoutRect transposedRect() const { return LayoutRect(m_location.transposedPoint(), m_size.transposedSize()); } |
| |
| static LayoutRect infiniteRect() |
| { |
| // Return a rect that is slightly smaller than the true max rect to allow pixelSnapping to round up to the nearest IntRect without overflowing. |
| return LayoutRect(LayoutUnit::nearlyMin() / 2, LayoutUnit::nearlyMin() / 2, LayoutUnit::nearlyMax(), LayoutUnit::nearlyMax()); |
| } |
| |
| #ifndef NDEBUG |
| // Prints the rect to the screen. |
| void show(bool showRawValue = false) const; |
| #endif |
| |
| private: |
| LayoutPoint m_location; |
| LayoutSize m_size; |
| }; |
| |
| inline LayoutRect intersection(const LayoutRect& a, const LayoutRect& b) |
| { |
| LayoutRect c = a; |
| c.intersect(b); |
| return c; |
| } |
| |
| inline LayoutRect unionRect(const LayoutRect& a, const LayoutRect& b) |
| { |
| LayoutRect c = a; |
| c.unite(b); |
| return c; |
| } |
| |
| PLATFORM_EXPORT LayoutRect unionRect(const Vector<LayoutRect>&); |
| |
| ALWAYS_INLINE bool operator==(const LayoutRect& a, const LayoutRect& b) |
| { |
| return a.location() == b.location() && a.size() == b.size(); |
| } |
| |
| inline bool operator!=(const LayoutRect& a, const LayoutRect& b) |
| { |
| return a.location() != b.location() || a.size() != b.size(); |
| } |
| |
| inline IntRect pixelSnappedIntRect(const LayoutRect& rect) |
| { |
| return IntRect(roundedIntPoint(rect.location()), IntSize( |
| snapSizeToPixel(rect.width(), rect.x()), |
| snapSizeToPixel(rect.height(), rect.y()))); |
| } |
| |
| PLATFORM_EXPORT IntRect enclosingIntRect(const LayoutRect&); |
| PLATFORM_EXPORT LayoutRect enclosingLayoutRect(const FloatRect&); |
| |
| inline IntRect pixelSnappedIntRect(LayoutUnit left, LayoutUnit top, LayoutUnit width, LayoutUnit height) |
| { |
| return IntRect(left.round(), top.round(), snapSizeToPixel(width, left), snapSizeToPixel(height, top)); |
| } |
| |
| inline IntRect pixelSnappedIntRectFromEdges(LayoutUnit left, LayoutUnit top, LayoutUnit right, LayoutUnit bottom) |
| { |
| return IntRect(left.round(), top.round(), snapSizeToPixel(right - left, left), snapSizeToPixel(bottom - top, top)); |
| } |
| |
| inline IntRect pixelSnappedIntRect(LayoutPoint location, LayoutSize size) |
| { |
| return IntRect(roundedIntPoint(location), pixelSnappedIntSize(size, location)); |
| } |
| |
| } // namespace blink |
| |
| #endif // SKY_ENGINE_PLATFORM_GEOMETRY_LAYOUTRECT_H_ |