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// Copyright 2022 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef UI_VIEWS_HIGHLIGHT_BORDER_H_
#define UI_VIEWS_HIGHLIGHT_BORDER_H_
#include "ui/gfx/geometry/rounded_corners_f.h"
#include "ui/views/border.h"
#include "ui/views/views_export.h"
namespace gfx {
class Rect;
} // namespace gfx
namespace views {
constexpr int kHighlightBorderThickness = 1;
// A rounded rectangle border that has inner (highlight) and outer color.
// Useful when go/cros-launcher-spec mentions "BorderHighlight".
class VIEWS_EXPORT HighlightBorder : public views::Border {
public:
// TODO(crbug/1319944): Change these type names to something more descriptive.
enum class Type {
// The highlight border for the UI without a shadow.
kHighlightBorderNoShadow,
// The highlight border for the UI with a shadow.
kHighlightBorderOnShadow,
// TODO(b/271009119): Clean up these old types after MaterialNext is fully
// launched.
// A higher contrast highlight border than the `kHighlightBorder2` used
// for floating components that do not have a shield below.
kHighlightBorder1,
// A less contrast highlight border for components that float above a
// shield.
kHighlightBorder2,
// Has same inner border color as `kHighlightBorder1`. The outer color is
// same in dark and light mode with low opacity. This type is mainly used
// with `HighlightBorderLayerOverlay` whose outer border is outside the
// window contents. For more information, refer to the comment of
// `HighlightBorderOverlay`.
kHighlightBorder3,
};
// The type of insets created by this highlight border. The insets shrink the
// content view.
enum class InsetsType {
// The border does not add insets that shrink the content, so the content
// around the edge of the view can be overlapped with the border.
kNoInsets,
// Insetting by half of the border size pushes the content inside the outer
// color of the border so the content bounds is surrounded by outer color
// of the border.
kHalfInsets,
// Insetting by full border size makes sure that contents in the view
// start inside the inner color of the highlight border, so there is no
// overlap between content.
kFullInsets,
};
// Paints the highlight border onto `canvas` with given highlight and border
// border color. Note that directly using this function won't set the insets
// on any view so it acts like setting kNoInsets when using HighlightBorder
// class.
static void PaintBorderToCanvas(gfx::Canvas* canvas,
SkColor highlight_color,
SkColor border_color,
const gfx::Rect& bounds,
const gfx::RoundedCornersF& corner_radii,
Type type);
// Paints the highlight border onto `canvas` for the specified `view`. The
// color of the border will be determined using `view`'s color provider. Note
// that directly using this function won't set the insets on any view so it
// acts like setting kNoInsets when using HighlightBorder class.
static void PaintBorderToCanvas(gfx::Canvas* canvas,
const views::View& view,
const gfx::Rect& bounds,
const gfx::RoundedCornersF& corner_radii,
Type type);
// Returns the inner highlight color used to paint highlight border.
static SkColor GetHighlightColor(const views::View& view,
HighlightBorder::Type type);
// Returns the outer border color used to paint highlight border.
static SkColor GetBorderColor(const views::View& view,
HighlightBorder::Type type);
HighlightBorder(int corner_radius,
Type type,
InsetsType insets_type = InsetsType::kNoInsets);
HighlightBorder(const gfx::RoundedCornersF& rounded_corners,
Type type,
InsetsType insets_type = InsetsType::kNoInsets);
HighlightBorder(const HighlightBorder&) = delete;
HighlightBorder& operator=(const HighlightBorder&) = delete;
~HighlightBorder() override = default;
// views::Border:
void Paint(const views::View& view, gfx::Canvas* canvas) override;
void OnViewThemeChanged(views::View* view) override;
gfx::Insets GetInsets() const override;
gfx::Size GetMinimumSize() const override;
private:
// The rounded corners of this border.
const gfx::RoundedCornersF rounded_corners_;
const Type type_;
// Used by `GetInsets()` to calculate the insets.
const InsetsType insets_type_;
};
} // namespace views
#endif // UI_VIEWS_HIGHLIGHT_BORDER_H_
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