cef/libcef/browser/screen_util.cc

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// Copyright (c) 2022 The Chromium Embedded Framework Authors. All rights
// reserved. Use of this source code is governed by a BSD-style license that
// can be found in the LICENSE file.
#include "libcef/browser/screen_util.h"
#include <algorithm>
#include "ui/gfx/geometry/rect.h"
namespace {
constexpr int kMinWidth = 0;
constexpr int kMinHeight = 0;
// Makes sure that line segment lies entirely between min and max.
int clamp_segment_start(int start, int len, int min, int max) {
start = std::clamp(start, min, max);
const int end = start + len;
const int excess = end - max;
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if (excess > 0) {
start = start - excess;
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}
return start;
}
} // namespace
gfx::Rect MakeVisibleOnScreenRect(const gfx::Rect& rect,
const gfx::Rect& screen) {
const int width = std::clamp(rect.width(), kMinWidth, screen.width());
const int height = std::clamp(rect.height(), kMinHeight, screen.height());
const int right_border = screen.x() + screen.width();
const int x = clamp_segment_start(rect.x(), width, screen.x(), right_border);
const int bottom_border = screen.y() + screen.height();
const int y =
clamp_segment_start(rect.y(), height, screen.y(), bottom_border);
return gfx::Rect(x, y, width, height);
}