140 lines
5.2 KiB
C++
140 lines
5.2 KiB
C++
// Copyright (c) 2022 Microsoft, Inc. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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#include "shell/browser/ui/views/win_icon_painter.h"
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#include "base/numerics/safe_conversions.h"
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#include "ui/gfx/color_utils.h"
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#include "ui/gfx/geometry/rect_conversions.h"
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#include "ui/gfx/geometry/skia_conversions.h"
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#include "ui/gfx/scoped_canvas.h"
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namespace {
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// Canvas::DrawRect's stroke can bleed out of |rect|'s bounds, so this draws a
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// rectangle inset such that the result is constrained to |rect|'s size.
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void DrawRect(gfx::Canvas* canvas,
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const gfx::Rect& rect,
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const cc::PaintFlags& flags) {
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gfx::RectF rect_f(rect);
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float stroke_half_width = flags.getStrokeWidth() / 2;
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rect_f.Inset(stroke_half_width);
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canvas->DrawRect(rect_f, flags);
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}
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void DrawRoundRect(gfx::Canvas* canvas,
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const gfx::Rect& rect,
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float radius,
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const cc::PaintFlags& flags) {
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gfx::RectF rect_f(rect);
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float stroke_half_width = flags.getStrokeWidth() / 2;
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rect_f.Inset(stroke_half_width);
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canvas->DrawRoundRect(rect_f, radius, flags);
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}
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// Draws a path containing the top and right edges of a rounded rectangle.
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void DrawRoundRectEdges(gfx::Canvas* canvas,
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const gfx::Rect& rect,
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float radius,
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const cc::PaintFlags& flags) {
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gfx::RectF symbol_rect_f(rect);
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float stroke_half_width = flags.getStrokeWidth() / 2;
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symbol_rect_f.Inset(stroke_half_width);
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SkPath path;
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path.moveTo(symbol_rect_f.x(), symbol_rect_f.y());
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path.arcTo(symbol_rect_f.right(), symbol_rect_f.y(), symbol_rect_f.right(),
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symbol_rect_f.y() + radius, radius);
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path.lineTo(symbol_rect_f.right(), symbol_rect_f.bottom());
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canvas->DrawPath(path, flags);
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}
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} // namespace
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namespace electron {
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WinIconPainter::WinIconPainter() = default;
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WinIconPainter::~WinIconPainter() = default;
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void WinIconPainter::PaintMinimizeIcon(gfx::Canvas* canvas,
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const gfx::Rect& symbol_rect,
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const cc::PaintFlags& flags) {
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const int y = symbol_rect.CenterPoint().y();
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const gfx::Point p1 = gfx::Point(symbol_rect.x(), y);
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const gfx::Point p2 = gfx::Point(symbol_rect.right(), y);
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canvas->DrawLine(p1, p2, flags);
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}
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void WinIconPainter::PaintMaximizeIcon(gfx::Canvas* canvas,
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const gfx::Rect& symbol_rect,
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const cc::PaintFlags& flags) {
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DrawRect(canvas, symbol_rect, flags);
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}
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void WinIconPainter::PaintRestoreIcon(gfx::Canvas* canvas,
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const gfx::Rect& symbol_rect,
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const cc::PaintFlags& flags) {
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const int separation = base::ClampFloor(2 * canvas->image_scale());
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gfx::Rect icon_rect = symbol_rect;
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icon_rect.Inset(gfx::Insets::TLBR(separation, 0, 0, separation));
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// Bottom left ("in front") square.
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DrawRect(canvas, icon_rect, flags);
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// Top right ("behind") square.
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canvas->ClipRect(icon_rect, SkClipOp::kDifference);
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icon_rect.Offset(separation, -separation);
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DrawRect(canvas, icon_rect, flags);
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}
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void WinIconPainter::PaintCloseIcon(gfx::Canvas* canvas,
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const gfx::Rect& symbol_rect,
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const cc::PaintFlags& flags) {
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// TODO(bsep): This sometimes draws misaligned at fractional device scales
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// because the button's origin isn't necessarily aligned to pixels.
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cc::PaintFlags paint_flags = flags;
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paint_flags.setAntiAlias(true);
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canvas->ClipRect(symbol_rect);
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SkPath path;
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path.moveTo(symbol_rect.x(), symbol_rect.y());
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path.lineTo(symbol_rect.right(), symbol_rect.bottom());
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path.moveTo(symbol_rect.right(), symbol_rect.y());
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path.lineTo(symbol_rect.x(), symbol_rect.bottom());
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canvas->DrawPath(path, flags);
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}
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Win11IconPainter::Win11IconPainter() = default;
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Win11IconPainter::~Win11IconPainter() = default;
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void Win11IconPainter::PaintMaximizeIcon(gfx::Canvas* canvas,
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const gfx::Rect& symbol_rect,
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const cc::PaintFlags& flags) {
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cc::PaintFlags paint_flags = flags;
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paint_flags.setAntiAlias(true);
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const float corner_radius = canvas->image_scale();
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DrawRoundRect(canvas, symbol_rect, corner_radius, flags);
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}
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void Win11IconPainter::PaintRestoreIcon(gfx::Canvas* canvas,
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const gfx::Rect& symbol_rect,
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const cc::PaintFlags& flags) {
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const int separation = base::ClampFloor(2 * canvas->image_scale());
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gfx::Rect icon_rect = symbol_rect;
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icon_rect.Inset(gfx::Insets::TLBR(separation, 0, 0, separation));
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cc::PaintFlags paint_flags = flags;
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paint_flags.setAntiAlias(true);
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// Bottom left ("in front") rounded square.
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const float bottom_rect_radius = canvas->image_scale();
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DrawRoundRect(canvas, icon_rect, bottom_rect_radius, flags);
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// Top right ("behind") top+right edges of rounded square (2.5x).
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icon_rect.Offset(separation, -separation);
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const float top_rect_radius = 2.5f * canvas->image_scale();
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DrawRoundRectEdges(canvas, icon_rect, top_rect_radius, flags);
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}
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} // namespace electron
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