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/*
* Copyright (c) 2018-2022, Andreas Kling <kling@serenityos.org>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#include <LibGfx/AntiAliasingPainter.h>
#include <LibGfx/StylePainter.h>
#include <LibWeb/Layout/ListItemMarkerBox.h>
#include <LibWeb/Painting/MarkerPaintable.h>
namespace Web::Painting {
JS::NonnullGCPtr<MarkerPaintable> MarkerPaintable::create(Layout::ListItemMarkerBox const& layout_box)
{
return layout_box.heap().allocate_without_realm<MarkerPaintable>(layout_box);
}
MarkerPaintable::MarkerPaintable(Layout::ListItemMarkerBox const& layout_box)
: PaintableBox(layout_box)
{
}
Layout::ListItemMarkerBox const& MarkerPaintable::layout_box() const
{
return static_cast<Layout::ListItemMarkerBox const&>(layout_node());
}
constexpr float sin_60_deg = 0.866025403f;
void MarkerPaintable::paint(PaintContext& context, PaintPhase phase) const
{
if (phase != PaintPhase::Foreground)
return;
// FIXME: All this does is round to the nearest whole CSS pixel, but it's goofy.
CSSPixelRect enclosing = absolute_rect().to_type<double>().to_type<float>().to_rounded<float>().to_type<CSSPixels>();
auto device_enclosing = context.enclosing_device_rect(enclosing);
CSSPixels marker_width = enclosing.height() / 2.0;
if (auto const* list_style_image = layout_box().list_style_image()) {
CSSPixelRect image_rect {
0, 0,
list_style_image->natural_width().value_or(marker_width.value()),
list_style_image->natural_height().value_or(marker_width.value())
};
image_rect.center_within(enclosing);
auto device_image_rect = context.enclosing_device_rect(image_rect);
list_style_image->resolve_for_size(layout_box(), image_rect.size());
list_style_image->paint(context, device_image_rect, computed_values().image_rendering());
return;
}
CSSPixelRect marker_rect { 0, 0, marker_width, marker_width };
marker_rect.center_within(enclosing);
auto device_marker_rect = context.enclosing_device_rect(marker_rect);
float left = device_marker_rect.x().value();
float right = left + device_marker_rect.width().value();
float top = device_marker_rect.y().value();
float bottom = top + device_marker_rect.height().value();
auto color = computed_values().color();
Gfx::AntiAliasingPainter aa_painter { context.painter() };
switch (layout_box().list_style_type()) {
case CSS::ListStyleType::Square:
context.painter().fill_rect(device_marker_rect.to_type<int>(), color);
break;
case CSS::ListStyleType::Circle:
aa_painter.draw_ellipse(device_marker_rect.to_type<int>(), color, 1);
break;
case CSS::ListStyleType::Disc:
aa_painter.fill_ellipse(device_marker_rect.to_type<int>(), color);
break;
case CSS::ListStyleType::DisclosureClosed: {
// https://drafts.csswg.org/css-counter-styles-3/#disclosure-closed
// For the disclosure-open and disclosure-closed counter styles, the marker must be an image or character suitable for indicating the open and closed states of a disclosure widget, such as HTML’s details element.
// FIXME: If the image is directional, it must respond to the writing mode of the element, similar to the bidi-sensitive images feature of the Images 4 module.
// Draw an equilateral triangle pointing right.
auto path = Gfx::Path();
path.move_to({ left, top });
path.line_to({ left + sin_60_deg * (right - left), (top + bottom) / 2 });
path.line_to({ left, bottom });
path.close();
aa_painter.fill_path(path, color);
break;
}
case CSS::ListStyleType::DisclosureOpen: {
// https://drafts.csswg.org/css-counter-styles-3/#disclosure-open
// For the disclosure-open and disclosure-closed counter styles, the marker must be an image or character suitable for indicating the open and closed states of a disclosure widget, such as HTML’s details element.
// FIXME: If the image is directional, it must respond to the writing mode of the element, similar to the bidi-sensitive images feature of the Images 4 module.
// Draw an equilateral triangle pointing down.
auto path = Gfx::Path();
path.move_to({ left, top });
path.line_to({ right, top });
path.line_to({ (left + right) / 2, top + sin_60_deg * (bottom - top) });
path.close();
aa_painter.fill_path(path, color);
break;
}
case CSS::ListStyleType::Decimal:
case CSS::ListStyleType::DecimalLeadingZero:
case CSS::ListStyleType::LowerAlpha:
case CSS::ListStyleType::LowerLatin:
case CSS::ListStyleType::LowerRoman:
case CSS::ListStyleType::UpperAlpha:
case CSS::ListStyleType::UpperLatin:
case CSS::ListStyleType::UpperRoman:
if (layout_box().text().is_null())
break;
// FIXME: This should use proper text layout logic!
// This does not line up with the text in the <li> element which looks very sad :(
context.painter().draw_text(device_enclosing.to_type<int>(), layout_box().text(), layout_box().scaled_font(context), Gfx::TextAlignment::Center);
break;
case CSS::ListStyleType::None:
return;
default:
VERIFY_NOT_REACHED();
}
}
}
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