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/*
* 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
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "third_party/blink/renderer/platform/geometry/layout_rect.h"
#include <stdio.h>
#include <algorithm>
#include "third_party/blink/renderer/platform/geometry/double_rect.h"
#include "third_party/blink/renderer/platform/geometry/float_rect.h"
#include "third_party/blink/renderer/platform/geometry/layout_unit.h"
#include "third_party/blink/renderer/platform/wtf/text/text_stream.h"
#include "third_party/blink/renderer/platform/wtf/text/wtf_string.h"
namespace blink {
LayoutRect::LayoutRect(const FloatRect& r)
: location_(LayoutPoint(r.Location())), size_(LayoutSize(r.Size())) {}
LayoutRect::LayoutRect(const DoubleRect& r)
: location_(LayoutPoint(r.Location())), size_(LayoutSize(r.Size())) {}
bool LayoutRect::Intersects(const LayoutRect& other) const {
// Checking emptiness handles negative widths as well as zero.
return !IsEmpty() && !other.IsEmpty() && X() < other.MaxX() &&
other.X() < MaxX() && Y() < other.MaxY() && other.Y() < MaxY();
}
bool LayoutRect::Contains(const LayoutRect& other) const {
return X() <= other.X() && MaxX() >= other.MaxX() && Y() <= other.Y() &&
MaxY() >= other.MaxY();
}
void LayoutRect::Intersect(const LayoutRect& other) {
LayoutPoint new_location(std::max(X(), other.X()), std::max(Y(), other.Y()));
LayoutPoint new_max_point(std::min(MaxX(), other.MaxX()),
std::min(MaxY(), other.MaxY()));
// Return a clean empty rectangle for non-intersecting cases.
if (new_location.X() >= new_max_point.X() ||
new_location.Y() >= new_max_point.Y()) {
new_location = LayoutPoint();
new_max_point = LayoutPoint();
}
location_ = new_location;
size_ = new_max_point - new_location;
}
bool LayoutRect::InclusiveIntersect(const LayoutRect& other) {
LayoutPoint new_location(std::max(X(), other.X()), std::max(Y(), other.Y()));
LayoutPoint new_max_point(std::min(MaxX(), other.MaxX()),
std::min(MaxY(), other.MaxY()));
if (new_location.X() > new_max_point.X() ||
new_location.Y() > new_max_point.Y()) {
*this = LayoutRect();
return false;
}
location_ = new_location;
size_ = new_max_point - new_location;
return true;
}
bool LayoutRect::IntersectsInclusively(const LayoutRect& other) {
// TODO(pdr): How should negative widths or heights be handled?
return X() <= other.MaxX() && other.X() <= MaxX() && Y() <= other.MaxY() &&
other.Y() <= MaxY();
}
void LayoutRect::Unite(const LayoutRect& other) {
// Handle empty special cases first.
if (other.IsEmpty())
return;
if (IsEmpty()) {
*this = other;
return;
}
UniteEvenIfEmpty(other);
}
void LayoutRect::UniteIfNonZero(const LayoutRect& other) {
// Handle empty special cases first.
if (!other.Width() && !other.Height())
return;
if (!Width() && !Height()) {
*this = other;
return;
}
UniteEvenIfEmpty(other);
}
void LayoutRect::UniteEvenIfEmpty(const LayoutRect& other) {
LayoutPoint new_location(std::min(X(), other.X()), std::min(Y(), other.Y()));
LayoutPoint new_max_point(std::max(MaxX(), other.MaxX()),
std::max(MaxY(), other.MaxY()));
location_ = new_location;
size_ = new_max_point - new_location;
}
void LayoutRect::Scale(float s) {
location_.Scale(s, s);
size_.Scale(s);
}
void LayoutRect::Scale(float x_axis_scale, float y_axis_scale) {
location_.Scale(x_axis_scale, y_axis_scale);
size_.Scale(x_axis_scale, y_axis_scale);
}
LayoutRect UnionRect(const Vector<LayoutRect>& rects) {
LayoutRect result;
for (const LayoutRect& rect : rects)
result.Unite(rect);
return result;
}
LayoutRect UnionRectEvenIfEmpty(const Vector<LayoutRect>& rects) {
wtf_size_t count = rects.size();
if (!count)
return LayoutRect();
LayoutRect result = rects[0];
for (wtf_size_t i = 1; i < count; ++i)
result.UniteEvenIfEmpty(rects[i]);
return result;
}
std::ostream& operator<<(std::ostream& ostream, const LayoutRect& rect) {
return ostream << rect.ToString();
}
String LayoutRect::ToString() const {
return String::Format("%s %s", Location().ToString().Ascii().data(),
Size().ToString().Ascii().data());
}
WTF::TextStream& operator<<(WTF::TextStream& ts, const LayoutRect& rect) {
return ts << FloatRect(rect);
}
} // namespace blink