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/*
* Copyright (c) 2018-2022, Andreas Kling <kling@serenityos.org>
* Copyright (c) 2023, MacDue <macdue@dueutil.tech>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#include <LibGUI/Event.h>
#include <LibGfx/StylePainter.h>
#include <LibWeb/DOM/Document.h>
#include <LibWeb/HTML/BrowsingContext.h>
#include <LibWeb/HTML/HTMLInputElement.h>
#include <LibWeb/Layout/Label.h>
#include <LibWeb/Layout/RadioButton.h>
#include <LibWeb/Painting/InputColors.h>
#include <LibWeb/Painting/RadioButtonPaintable.h>
namespace Web::Painting {
JS::NonnullGCPtr<RadioButtonPaintable> RadioButtonPaintable::create(Layout::RadioButton const& layout_box)
{
return layout_box.heap().allocate_without_realm<RadioButtonPaintable>(layout_box);
}
RadioButtonPaintable::RadioButtonPaintable(Layout::RadioButton const& layout_box)
: LabelablePaintable(layout_box)
{
}
void RadioButtonPaintable::paint(PaintContext& context, PaintPhase phase) const
{
if (!is_visible())
return;
PaintableBox::paint(context, phase);
if (phase != PaintPhase::Foreground)
return;
Gfx::AntiAliasingPainter painter { context.painter() };
auto draw_circle = [&](auto const& rect, Color color) {
// Note: Doing this is a bit more forgiving than draw_circle() which will round to the nearset even radius.
// This will fudge it (which works better here).
painter.fill_rect_with_rounded_corners(rect, color, rect.width() / 2);
};
auto shrink_all = [&](auto const& rect, int amount) {
return rect.shrunken(amount, amount, amount, amount);
};
auto const& radio_button = static_cast<HTML::HTMLInputElement const&>(layout_box().dom_node());
auto& palette = context.palette();
bool enabled = layout_box().dom_node().enabled();
auto input_colors = compute_input_colors(palette, computed_values().accent_color());
auto background_color = input_colors.background_color(enabled);
auto accent = input_colors.accent;
auto radio_color = [&] {
if (radio_button.checked()) {
// Handle the awkward case where a light color has been used for the accent color.
if (accent.contrast_ratio(background_color) < 2 && accent.contrast_ratio(input_colors.dark_gray) > 2)
background_color = input_colors.dark_gray;
return accent;
}
return input_colors.gray;
};
auto fill_color = [&] {
if (!enabled)
return input_colors.mid_gray;
auto color = radio_color();
if (being_pressed())
color = InputColors::get_shade(color, 0.3f, palette.is_dark());
return color;
}();
// This is based on a 1px outer border and 2px inner border when drawn at 13x13.
auto radio_button_rect = context.enclosing_device_rect(absolute_rect()).to_type<int>();
auto outer_border_width = max(1, static_cast<int>(ceilf(radio_button_rect.width() / 13.0f)));
auto inner_border_width = max(2, static_cast<int>(ceilf(radio_button_rect.width() / 4.0f)));
draw_circle(radio_button_rect, fill_color);
draw_circle(shrink_all(radio_button_rect, outer_border_width), background_color);
if (radio_button.checked())
draw_circle(shrink_all(radio_button_rect, inner_border_width), fill_color);
}
}
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