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// Copyright 2019 The Chromium 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 "cc/paint/paint_canvas.h"
#include "third_party/skia/include/core/SkRect.h"
#include "ui/gfx/gfx_export.h"
namespace gfx {
class GFX_EXPORT CocoaScrollbarPainter {
enum class Orientation {
// Vertical scrollbar on the right side of content.
// Vertical scrollbar on the left side of content.
// Horizontal scrollbar (on the bottom of content).
struct Params {
// The orientation of the scrollbar.
Orientation orientation = Orientation::kVerticalOnRight;
// Whether or not this is an overlay scrollbar.
bool overlay = false;
// Scrollbars change color in dark mode.
bool dark_mode = false;
// Non-overlay scrollbars change thumb color when they are hovered (or
// pressed).
bool hovered = false;
// Paint the thumb. The |thumb_bounds| changes over time when the thumb
// engorges during hover.
static void PaintThumb(cc::PaintCanvas* canvas,
const SkIRect& thumb_bounds,
const Params& params);
// Paint the track. |track_bounds| is the bounds for the track.
static void PaintTrack(cc::PaintCanvas* canvas,
const SkIRect& track_bounds,
const Params& params);
// Paint the corner. |corner_bounds| is the bounds for the corner.
static void PaintCorner(cc::PaintCanvas* canvas,
const SkIRect& corner_bounds,
const Params& params);
} // namespace gfx