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// Copyright 2020 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_BADGE_PAINTER_H_
#define UI_VIEWS_BADGE_PAINTER_H_
#include <string>
#include "ui/views/views_export.h"
namespace gfx {
class Canvas;
class FontList;
class Size;
} // namespace gfx
namespace views {
class View;
// Painter that paints a badge on the canvas of any other view.
// Provides static methods only;
class VIEWS_EXPORT BadgePainter {
public:
// This is a utility class and should not be instantiated.
BadgePainter() = delete;
// Draws the badge on `canvas`. `unmirrored_badge_left_x` is the
// leading edge of the badge, not mirrored for RTL. `text_top_y` is the
// top of the text the badge should align with, and `primary_font` is the font
// of that text.
//
// You can call this method from any View to draw the badge directly onto the
// view as part of OnPaint() or a similar method.
static void PaintBadge(gfx::Canvas* canvas,
const View* view,
int unmirrored_badge_left_x,
int text_top_y,
const std::u16string& text,
const gfx::FontList& primary_font);
// Returns the space required for the badge itself, not counting leading
// or trailing margin. It is recommended to leave a margin of
// BadgePainter::kBadgeHorizontalMargin between the badge and any other text
// or image elements.
static gfx::Size GetBadgeSize(const std::u16string& text,
const gfx::FontList& primary_font);
// Returns the appropriate font to use for the badge based on the font
// currently being used to render the surrounding text.
static gfx::FontList GetBadgeFont(const gfx::FontList& context_font);
// Layout Constants
//
// Note that there are a few differences between Views and Mac constants here
// that are due to the fact that the rendering is different and therefore
// tweaks to the spacing need to be made to achieve the same visual result.
// Difference in the font size (in pixels) between menu label font and
// badge font size.
static constexpr int kBadgeFontSizeAdjustment = -1;
// Space between primary text and badge.
static constexpr int kBadgeHorizontalMargin = 8;
// Highlight padding around text.
static constexpr int kBadgeInternalPadding = 4;
// The minimal badge height on a cocoa menu.
static constexpr int kBadgeMinHeightCocoa = 16;
};
} // namespace views
#endif // UI_VIEWS_BADGE_PAINTER_H_
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