ladybird/Userland/Libraries/LibWeb/Layout/ListItemMarkerBox.cpp
Tobias Christiansen 0983cd9243 LibWeb: Add list-style-type: decimal-leading-zero support
This doesn't exactly do what you would think from its name: It surely
adds an extra leading zero to the front of a number, but only if the
number is less than 10. CSS is weird sometimes.
2021-04-29 10:43:33 +02:00

70 lines
2.4 KiB
C++

/*
* Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
* Copyright (c) 2021, Tobias Christiansen <tobi@tobyase.de>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#include <LibGfx/Painter.h>
#include <LibWeb/Layout/ListItemMarkerBox.h>
namespace Web::Layout {
ListItemMarkerBox::ListItemMarkerBox(DOM::Document& document, CSS::ListStyleType style_type, size_t index)
: Box(document, nullptr, CSS::StyleProperties::create())
, m_list_style_type(style_type)
, m_index(index)
{
}
ListItemMarkerBox::~ListItemMarkerBox()
{
}
void ListItemMarkerBox::paint(PaintContext& context, PaintPhase phase)
{
if (phase != PaintPhase::Foreground)
return;
// FIXME: It would be nicer to not have to go via the parent here to get our inherited style.
auto color = parent()->computed_values().color();
auto enclosing = enclosing_int_rect(absolute_rect());
int marker_width = (int)enclosing.height() / 2;
Gfx::IntRect marker_rect { 0, 0, marker_width, marker_width };
marker_rect.center_within(enclosing);
switch (m_list_style_type) {
case CSS::ListStyleType::Square:
context.painter().fill_rect(marker_rect, color);
break;
case CSS::ListStyleType::Circle:
// For some reason for draw_ellipse() the ellipse is outside of the rect while for fill_ellipse() the ellipse is inside.
// Scale the marker_rect with sqrt(2) to get an ellipse arc (circle) that appears as if it was inside of the marker_rect.
marker_rect.set_height(marker_rect.height() / 1.41);
marker_rect.set_width(marker_rect.width() / 1.41);
marker_rect.center_within(enclosing);
context.painter().draw_ellipse_intersecting(marker_rect, color);
break;
case CSS::ListStyleType::Decimal:
context.painter().draw_text(enclosing, String::formatted("{}.", m_index), Gfx::TextAlignment::Center);
break;
case CSS::ListStyleType::Disc:
context.painter().fill_ellipse(marker_rect, color);
break;
case CSS::ListStyleType::DecimalLeadingZero:
// This is weird, but in accordance to spec.
context.painter().draw_text(
enclosing,
m_index < 10 ? String::formatted("0{}.", m_index) : String::formatted("{}.", m_index),
Gfx::TextAlignment::Center);
break;
case CSS::ListStyleType::None:
return;
default:
VERIFY_NOT_REACHED();
}
}
}