732 lines
33 KiB
C++
732 lines
33 KiB
C++
/*
|
||
* Copyright (c) 2022, Andreas Kling <kling@serenityos.org>
|
||
* Copyright (c) 2022, Sam Atkins <atkinssj@serenityos.org>
|
||
*
|
||
* SPDX-License-Identifier: BSD-2-Clause
|
||
*/
|
||
|
||
#include <AK/GenericShorthands.h>
|
||
#include <LibUnicode/CharacterTypes.h>
|
||
#include <LibWeb/DOM/Document.h>
|
||
#include <LibWeb/HTML/HTMLHtmlElement.h>
|
||
#include <LibWeb/Layout/BlockContainer.h>
|
||
#include <LibWeb/Layout/InitialContainingBlock.h>
|
||
#include <LibWeb/Painting/BackgroundPainting.h>
|
||
#include <LibWeb/Painting/FilterPainting.h>
|
||
#include <LibWeb/Painting/PaintableBox.h>
|
||
#include <LibWeb/Painting/StackingContext.h>
|
||
#include <LibWeb/Platform/FontPlugin.h>
|
||
|
||
namespace Web::Painting {
|
||
|
||
NonnullRefPtr<PaintableBox> PaintableBox::create(Layout::Box const& layout_box)
|
||
{
|
||
return adopt_ref(*new PaintableBox(layout_box));
|
||
}
|
||
|
||
PaintableBox::PaintableBox(Layout::Box const& layout_box)
|
||
: Paintable(layout_box)
|
||
{
|
||
}
|
||
|
||
PaintableBox::~PaintableBox()
|
||
{
|
||
}
|
||
|
||
void PaintableBox::invalidate_stacking_context()
|
||
{
|
||
m_stacking_context = nullptr;
|
||
}
|
||
|
||
bool PaintableBox::is_out_of_view(PaintContext& context) const
|
||
{
|
||
return !context.enclosing_device_rect(absolute_paint_rect())
|
||
.to_type<int>()
|
||
.translated(context.painter().translation())
|
||
.intersects(context.painter().clip_rect());
|
||
}
|
||
|
||
PaintableWithLines::PaintableWithLines(Layout::BlockContainer const& layout_box)
|
||
: PaintableBox(layout_box)
|
||
{
|
||
}
|
||
|
||
PaintableWithLines::~PaintableWithLines()
|
||
{
|
||
}
|
||
|
||
void PaintableBox::set_offset(CSSPixelPoint offset)
|
||
{
|
||
m_offset = offset;
|
||
layout_box().did_set_rect();
|
||
}
|
||
|
||
void PaintableBox::set_content_size(CSSPixelSize size)
|
||
{
|
||
m_content_size = size;
|
||
layout_box().did_set_rect();
|
||
}
|
||
|
||
CSSPixelPoint PaintableBox::effective_offset() const
|
||
{
|
||
CSSPixelPoint offset;
|
||
if (m_containing_line_box_fragment.has_value()) {
|
||
|
||
// FIXME: This is a hack to deal with situations where the layout tree has been garbage collected.
|
||
// We could avoid this by making the paintable tree garbage collected as well.
|
||
if (!containing_block() || !containing_block()->paint_box())
|
||
return offset;
|
||
|
||
auto const& fragment = containing_block()->paint_box()->line_boxes()[m_containing_line_box_fragment->line_box_index].fragments()[m_containing_line_box_fragment->fragment_index];
|
||
offset = fragment.offset();
|
||
} else {
|
||
offset = m_offset;
|
||
}
|
||
if (layout_box().computed_values().position() == CSS::Position::Relative) {
|
||
auto const& inset = layout_box().box_model().inset;
|
||
offset.translate_by(inset.left, inset.top);
|
||
}
|
||
return offset;
|
||
}
|
||
|
||
CSSPixelRect PaintableBox::compute_absolute_rect() const
|
||
{
|
||
CSSPixelRect rect { effective_offset(), content_size() };
|
||
for (auto const* block = containing_block(); block && block->paintable(); block = block->paintable()->containing_block())
|
||
rect.translate_by(block->paint_box()->effective_offset());
|
||
return rect;
|
||
}
|
||
|
||
CSSPixelRect PaintableBox::absolute_rect() const
|
||
{
|
||
if (!m_absolute_rect.has_value())
|
||
m_absolute_rect = compute_absolute_rect();
|
||
return *m_absolute_rect;
|
||
}
|
||
|
||
CSSPixelRect PaintableBox::compute_absolute_paint_rect() const
|
||
{
|
||
// FIXME: This likely incomplete:
|
||
auto rect = absolute_border_box_rect();
|
||
auto resolved_box_shadow_data = resolve_box_shadow_data();
|
||
for (auto const& shadow : resolved_box_shadow_data) {
|
||
if (shadow.placement == ShadowPlacement::Inner)
|
||
continue;
|
||
auto inflate = shadow.spread_distance + shadow.blur_radius;
|
||
auto shadow_rect = rect.inflated(inflate, inflate, inflate, inflate).translated(shadow.offset_x, shadow.offset_y);
|
||
rect = rect.united(shadow_rect);
|
||
}
|
||
return rect;
|
||
}
|
||
|
||
CSSPixelRect PaintableBox::absolute_paint_rect() const
|
||
{
|
||
if (!m_absolute_paint_rect.has_value())
|
||
m_absolute_paint_rect = compute_absolute_paint_rect();
|
||
return *m_absolute_paint_rect;
|
||
}
|
||
|
||
void PaintableBox::set_containing_line_box_fragment(Optional<Layout::LineBoxFragmentCoordinate> fragment_coordinate)
|
||
{
|
||
m_containing_line_box_fragment = fragment_coordinate;
|
||
}
|
||
|
||
Painting::StackingContext* PaintableBox::enclosing_stacking_context()
|
||
{
|
||
for (auto* ancestor = layout_box().parent(); ancestor; ancestor = ancestor->parent()) {
|
||
if (!is<Layout::Box>(ancestor))
|
||
continue;
|
||
auto& ancestor_box = static_cast<Layout::Box&>(const_cast<Layout::NodeWithStyle&>(*ancestor));
|
||
if (auto* ancestor_paint_box = ancestor_box.paint_box(); ancestor_paint_box && ancestor_paint_box->stacking_context())
|
||
return const_cast<StackingContext*>(ancestor_paint_box->stacking_context());
|
||
}
|
||
// We should always reach the Layout::InitialContainingBlock stacking context.
|
||
VERIFY_NOT_REACHED();
|
||
}
|
||
|
||
void PaintableBox::paint(PaintContext& context, PaintPhase phase) const
|
||
{
|
||
if (!is_visible())
|
||
return;
|
||
|
||
auto clip_rect = computed_values().clip();
|
||
auto should_clip_rect = clip_rect.is_rect() && layout_box().is_absolutely_positioned();
|
||
|
||
if (phase == PaintPhase::Background) {
|
||
if (should_clip_rect) {
|
||
context.painter().save();
|
||
auto border_box = absolute_border_box_rect();
|
||
context.painter().add_clip_rect(context.rounded_device_rect(clip_rect.to_rect().resolved(Paintable::layout_node(), border_box.to_type<float>()).to_type<CSSPixels>()).to_type<int>());
|
||
}
|
||
paint_backdrop_filter(context);
|
||
paint_background(context);
|
||
paint_box_shadow(context);
|
||
}
|
||
|
||
if (phase == PaintPhase::Border) {
|
||
paint_border(context);
|
||
}
|
||
|
||
if (phase == PaintPhase::Overlay && should_clip_rect)
|
||
context.painter().restore();
|
||
|
||
if (phase == PaintPhase::Overlay && layout_box().dom_node() && layout_box().document().inspected_node() == layout_box().dom_node()) {
|
||
auto content_rect = absolute_rect();
|
||
|
||
auto margin_box = box_model().margin_box();
|
||
CSSPixelRect margin_rect;
|
||
margin_rect.set_x(absolute_x() - margin_box.left);
|
||
margin_rect.set_width(content_width() + margin_box.left + margin_box.right);
|
||
margin_rect.set_y(absolute_y() - margin_box.top);
|
||
margin_rect.set_height(content_height() + margin_box.top + margin_box.bottom);
|
||
|
||
auto border_rect = absolute_border_box_rect();
|
||
auto padding_rect = absolute_padding_box_rect();
|
||
|
||
auto paint_inspector_rect = [&](CSSPixelRect const& rect, Color color) {
|
||
auto device_rect = context.enclosing_device_rect(rect).to_type<int>();
|
||
context.painter().fill_rect(device_rect, Color(color).with_alpha(100));
|
||
context.painter().draw_rect(device_rect, Color(color));
|
||
};
|
||
|
||
paint_inspector_rect(margin_rect, Color::Yellow);
|
||
paint_inspector_rect(padding_rect, Color::Cyan);
|
||
paint_inspector_rect(border_rect, Color::Green);
|
||
paint_inspector_rect(content_rect, Color::Magenta);
|
||
|
||
auto& font = Platform::FontPlugin::the().default_font();
|
||
|
||
StringBuilder builder;
|
||
if (layout_box().dom_node())
|
||
builder.append(layout_box().dom_node()->debug_description());
|
||
else
|
||
builder.append(layout_box().debug_description());
|
||
builder.appendff(" {}x{} @ {},{}", border_rect.width(), border_rect.height(), border_rect.x(), border_rect.y());
|
||
auto size_text = builder.to_deprecated_string();
|
||
auto size_text_rect = border_rect;
|
||
size_text_rect.set_y(border_rect.y() + border_rect.height());
|
||
size_text_rect.set_top(size_text_rect.top());
|
||
size_text_rect.set_width((float)font.width(size_text) + 4);
|
||
size_text_rect.set_height(font.pixel_size() + 4);
|
||
auto size_text_device_rect = context.enclosing_device_rect(size_text_rect).to_type<int>();
|
||
context.painter().fill_rect(size_text_device_rect, context.palette().color(Gfx::ColorRole::Tooltip));
|
||
context.painter().draw_rect(size_text_device_rect, context.palette().threed_shadow1());
|
||
context.painter().draw_text(size_text_device_rect, size_text, font, Gfx::TextAlignment::Center, context.palette().color(Gfx::ColorRole::TooltipText));
|
||
}
|
||
|
||
if (phase == PaintPhase::FocusOutline && layout_box().dom_node() && layout_box().dom_node()->is_element() && verify_cast<DOM::Element>(*layout_box().dom_node()).is_focused()) {
|
||
// FIXME: Implement this as `outline` using :focus-visible in the default UA stylesheet to make it possible to override/disable.
|
||
auto focus_outline_rect = context.enclosing_device_rect(absolute_border_box_rect()).inflated(4, 4);
|
||
context.painter().draw_focus_rect(focus_outline_rect.to_type<int>(), context.palette().focus_outline());
|
||
}
|
||
}
|
||
|
||
void PaintableBox::paint_border(PaintContext& context) const
|
||
{
|
||
auto borders_data = BordersData {
|
||
.top = box_model().border.top == 0 ? CSS::BorderData() : computed_values().border_top(),
|
||
.right = box_model().border.right == 0 ? CSS::BorderData() : computed_values().border_right(),
|
||
.bottom = box_model().border.bottom == 0 ? CSS::BorderData() : computed_values().border_bottom(),
|
||
.left = box_model().border.left == 0 ? CSS::BorderData() : computed_values().border_left(),
|
||
};
|
||
paint_all_borders(context, absolute_border_box_rect(), normalized_border_radii_data(), borders_data);
|
||
}
|
||
|
||
void PaintableBox::paint_backdrop_filter(PaintContext& context) const
|
||
{
|
||
auto& backdrop_filter = computed_values().backdrop_filter();
|
||
if (!backdrop_filter.is_none())
|
||
Painting::apply_backdrop_filter(context, layout_node(), absolute_border_box_rect(), normalized_border_radii_data(), backdrop_filter);
|
||
}
|
||
|
||
void PaintableBox::paint_background(PaintContext& context) const
|
||
{
|
||
// If the body's background properties were propagated to the root element, do no re-paint the body's background.
|
||
if (layout_box().is_body() && document().html_element()->should_use_body_background_properties())
|
||
return;
|
||
|
||
CSSPixelRect background_rect;
|
||
Color background_color = computed_values().background_color();
|
||
auto* background_layers = &computed_values().background_layers();
|
||
|
||
if (layout_box().is_root_element()) {
|
||
// CSS 2.1 Appendix E.2: If the element is a root element, paint the background over the entire canvas.
|
||
background_rect = context.css_viewport_rect();
|
||
|
||
// Section 2.11.2: If the computed value of background-image on the root element is none and its background-color is transparent,
|
||
// user agents must instead propagate the computed values of the background properties from that element’s first HTML BODY child element.
|
||
if (document().html_element()->should_use_body_background_properties()) {
|
||
background_layers = document().background_layers();
|
||
background_color = document().background_color(context.palette());
|
||
}
|
||
} else {
|
||
background_rect = absolute_padding_box_rect();
|
||
}
|
||
|
||
// HACK: If the Box has a border, use the bordered_rect to paint the background.
|
||
// This way if we have a border-radius there will be no gap between the filling and actual border.
|
||
if (computed_values().border_top().width || computed_values().border_right().width || computed_values().border_bottom().width || computed_values().border_left().width)
|
||
background_rect = absolute_border_box_rect();
|
||
|
||
Painting::paint_background(context, layout_box(), background_rect, background_color, computed_values().image_rendering(), background_layers, normalized_border_radii_data());
|
||
}
|
||
|
||
Vector<ShadowData> PaintableBox::resolve_box_shadow_data() const
|
||
{
|
||
auto box_shadow_data = computed_values().box_shadow();
|
||
if (box_shadow_data.is_empty())
|
||
return {};
|
||
|
||
Vector<ShadowData> resolved_box_shadow_data;
|
||
resolved_box_shadow_data.ensure_capacity(box_shadow_data.size());
|
||
for (auto const& layer : box_shadow_data) {
|
||
resolved_box_shadow_data.empend(
|
||
layer.color,
|
||
layer.offset_x.to_px(layout_box()),
|
||
layer.offset_y.to_px(layout_box()),
|
||
layer.blur_radius.to_px(layout_box()),
|
||
layer.spread_distance.to_px(layout_box()),
|
||
layer.placement == CSS::ShadowPlacement::Outer ? ShadowPlacement::Outer : ShadowPlacement::Inner);
|
||
}
|
||
|
||
return resolved_box_shadow_data;
|
||
}
|
||
|
||
void PaintableBox::paint_box_shadow(PaintContext& context) const
|
||
{
|
||
auto resolved_box_shadow_data = resolve_box_shadow_data();
|
||
if (resolved_box_shadow_data.is_empty())
|
||
return;
|
||
Painting::paint_box_shadow(context, absolute_border_box_rect(), normalized_border_radii_data(), resolved_box_shadow_data);
|
||
}
|
||
|
||
BorderRadiiData PaintableBox::normalized_border_radii_data(ShrinkRadiiForBorders shrink) const
|
||
{
|
||
auto border_radius_data = Painting::normalized_border_radii_data(layout_box(),
|
||
absolute_border_box_rect(),
|
||
computed_values().border_top_left_radius(),
|
||
computed_values().border_top_right_radius(),
|
||
computed_values().border_bottom_right_radius(),
|
||
computed_values().border_bottom_left_radius());
|
||
if (shrink == ShrinkRadiiForBorders::Yes)
|
||
border_radius_data.shrink(computed_values().border_top().width, computed_values().border_right().width, computed_values().border_bottom().width, computed_values().border_left().width);
|
||
return border_radius_data;
|
||
}
|
||
|
||
Optional<Gfx::IntRect> PaintableBox::clip_rect() const
|
||
{
|
||
if (!m_clip_rect.has_value()) {
|
||
if (containing_block() && containing_block()->paint_box())
|
||
m_clip_rect = containing_block()->paint_box()->clip_rect();
|
||
|
||
auto overflow_x = computed_values().overflow_x();
|
||
auto overflow_y = computed_values().overflow_y();
|
||
|
||
if (overflow_x == CSS::Overflow::Hidden && overflow_y == CSS::Overflow::Hidden) {
|
||
if (m_clip_rect.has_value()) {
|
||
m_clip_rect->intersect(absolute_padding_box_rect().to_type<float>().to_rounded<int>());
|
||
} else {
|
||
m_clip_rect = absolute_padding_box_rect().to_type<float>().to_rounded<int>();
|
||
}
|
||
}
|
||
}
|
||
|
||
return m_clip_rect;
|
||
}
|
||
|
||
void PaintableBox::before_children_paint(PaintContext& context, PaintPhase phase) const
|
||
{
|
||
if (!AK::first_is_one_of(phase, PaintPhase::Background, PaintPhase::Border, PaintPhase::Foreground))
|
||
return;
|
||
|
||
// FIXME: Support more overflow variations.
|
||
auto clip_rect = this->clip_rect();
|
||
auto overflow_x = computed_values().overflow_x();
|
||
auto overflow_y = computed_values().overflow_y();
|
||
|
||
auto clip_overflow = [&] {
|
||
if (!m_clipping_overflow) {
|
||
context.painter().save();
|
||
context.painter().add_clip_rect(*clip_rect);
|
||
m_clipping_overflow = true;
|
||
}
|
||
};
|
||
|
||
if (clip_rect.has_value()) {
|
||
clip_overflow();
|
||
}
|
||
|
||
if (overflow_y == CSS::Overflow::Hidden || overflow_x == CSS::Overflow::Hidden) {
|
||
auto border_radii_data = normalized_border_radii_data(ShrinkRadiiForBorders::Yes);
|
||
if (border_radii_data.has_any_radius()) {
|
||
auto corner_clipper = BorderRadiusCornerClipper::create(context, clip_rect->to_type<DevicePixels>(), border_radii_data, CornerClip::Outside, BorderRadiusCornerClipper::UseCachedBitmap::No);
|
||
if (corner_clipper.is_error()) {
|
||
dbgln("Failed to create overflow border-radius corner clipper: {}", corner_clipper.error());
|
||
return;
|
||
}
|
||
clip_overflow();
|
||
m_overflow_corner_radius_clipper = corner_clipper.release_value();
|
||
m_overflow_corner_radius_clipper->sample_under_corners(context.painter());
|
||
}
|
||
}
|
||
}
|
||
|
||
void PaintableBox::after_children_paint(PaintContext& context, PaintPhase phase) const
|
||
{
|
||
if (!AK::first_is_one_of(phase, PaintPhase::Background, PaintPhase::Border, PaintPhase::Foreground))
|
||
return;
|
||
|
||
// FIXME: Support more overflow variations.
|
||
if (m_clipping_overflow) {
|
||
context.painter().restore();
|
||
m_clipping_overflow = false;
|
||
}
|
||
if (m_overflow_corner_radius_clipper.has_value()) {
|
||
m_overflow_corner_radius_clipper->blit_corner_clipping(context.painter());
|
||
m_overflow_corner_radius_clipper = {};
|
||
}
|
||
}
|
||
|
||
static void paint_cursor_if_needed(PaintContext& context, Layout::TextNode const& text_node, Layout::LineBoxFragment const& fragment)
|
||
{
|
||
auto const& browsing_context = text_node.browsing_context();
|
||
|
||
if (!browsing_context.is_focused_context())
|
||
return;
|
||
|
||
if (!browsing_context.cursor_blink_state())
|
||
return;
|
||
|
||
if (browsing_context.cursor_position().node() != &text_node.dom_node())
|
||
return;
|
||
|
||
// NOTE: This checks if the cursor is before the start or after the end of the fragment. If it is at the end, after all text, it should still be painted.
|
||
if (browsing_context.cursor_position().offset() < (unsigned)fragment.start() || browsing_context.cursor_position().offset() > (unsigned)(fragment.start() + fragment.length()))
|
||
return;
|
||
|
||
if (!fragment.layout_node().dom_node() || !fragment.layout_node().dom_node()->is_editable())
|
||
return;
|
||
|
||
auto fragment_rect = fragment.absolute_rect();
|
||
|
||
CSSPixelRect cursor_rect {
|
||
fragment_rect.x() + text_node.font().width(fragment.text().substring_view(0, text_node.browsing_context().cursor_position().offset() - fragment.start())),
|
||
fragment_rect.top(),
|
||
1,
|
||
fragment_rect.height()
|
||
};
|
||
|
||
auto cursor_device_rect = context.rounded_device_rect(cursor_rect).to_type<int>();
|
||
|
||
context.painter().draw_rect(cursor_device_rect, text_node.computed_values().color());
|
||
}
|
||
|
||
static void paint_text_decoration(PaintContext& context, Gfx::Painter& painter, Layout::Node const& text_node, Layout::LineBoxFragment const& fragment)
|
||
{
|
||
auto& font = fragment.layout_node().font();
|
||
auto fragment_box = fragment.absolute_rect();
|
||
CSSPixels glyph_height = font.pixel_size();
|
||
auto baseline = fragment_box.height() / 2 - (glyph_height + 4) / 2 + glyph_height;
|
||
|
||
auto line_color = text_node.computed_values().text_decoration_color();
|
||
|
||
CSSPixels css_line_thickness = [&] {
|
||
CSS::Length computed_thickness = text_node.computed_values().text_decoration_thickness().resolved(text_node, CSS::Length(1, CSS::Length::Type::Em));
|
||
if (computed_thickness.is_auto())
|
||
return max(glyph_height * 0.1f, 1.f);
|
||
|
||
return CSSPixels(computed_thickness.to_px(text_node));
|
||
}();
|
||
auto device_line_thickness = context.rounded_device_pixels(css_line_thickness);
|
||
|
||
auto text_decoration_lines = text_node.computed_values().text_decoration_line();
|
||
for (auto line : text_decoration_lines) {
|
||
DevicePixelPoint line_start_point {};
|
||
DevicePixelPoint line_end_point {};
|
||
|
||
switch (line) {
|
||
case CSS::TextDecorationLine::None:
|
||
return;
|
||
case CSS::TextDecorationLine::Underline:
|
||
line_start_point = context.rounded_device_point(fragment_box.top_left().translated(0, baseline + 2));
|
||
line_end_point = context.rounded_device_point(fragment_box.top_right().translated(0, baseline + 2));
|
||
break;
|
||
case CSS::TextDecorationLine::Overline:
|
||
line_start_point = context.rounded_device_point(fragment_box.top_left().translated(0, baseline - glyph_height));
|
||
line_end_point = context.rounded_device_point(fragment_box.top_right().translated(0, baseline - glyph_height));
|
||
break;
|
||
case CSS::TextDecorationLine::LineThrough: {
|
||
auto x_height = font.x_height();
|
||
line_start_point = context.rounded_device_point(fragment_box.top_left().translated(0, baseline - x_height * 0.5f));
|
||
line_end_point = context.rounded_device_point(fragment_box.top_right().translated(0, baseline - x_height * 0.5f));
|
||
break;
|
||
}
|
||
case CSS::TextDecorationLine::Blink:
|
||
// Conforming user agents may simply not blink the text
|
||
return;
|
||
}
|
||
|
||
switch (text_node.computed_values().text_decoration_style()) {
|
||
case CSS::TextDecorationStyle::Solid:
|
||
painter.draw_line(line_start_point.to_type<int>(), line_end_point.to_type<int>(), line_color, device_line_thickness.value(), Gfx::Painter::LineStyle::Solid);
|
||
break;
|
||
case CSS::TextDecorationStyle::Double:
|
||
switch (line) {
|
||
case CSS::TextDecorationLine::Underline:
|
||
break;
|
||
case CSS::TextDecorationLine::Overline:
|
||
line_start_point.translate_by(0, -device_line_thickness - context.rounded_device_pixels(1));
|
||
line_end_point.translate_by(0, -device_line_thickness - context.rounded_device_pixels(1));
|
||
break;
|
||
case CSS::TextDecorationLine::LineThrough:
|
||
line_start_point.translate_by(0, -device_line_thickness / 2);
|
||
line_end_point.translate_by(0, -device_line_thickness / 2);
|
||
break;
|
||
default:
|
||
VERIFY_NOT_REACHED();
|
||
}
|
||
|
||
painter.draw_line(line_start_point.to_type<int>(), line_end_point.to_type<int>(), line_color, device_line_thickness.value());
|
||
painter.draw_line(line_start_point.translated(0, device_line_thickness + 1).to_type<int>(), line_end_point.translated(0, device_line_thickness + 1).to_type<int>(), line_color, device_line_thickness.value());
|
||
break;
|
||
case CSS::TextDecorationStyle::Dashed:
|
||
painter.draw_line(line_start_point.to_type<int>(), line_end_point.to_type<int>(), line_color, device_line_thickness.value(), Gfx::Painter::LineStyle::Dashed);
|
||
break;
|
||
case CSS::TextDecorationStyle::Dotted:
|
||
painter.draw_line(line_start_point.to_type<int>(), line_end_point.to_type<int>(), line_color, device_line_thickness.value(), Gfx::Painter::LineStyle::Dotted);
|
||
break;
|
||
case CSS::TextDecorationStyle::Wavy:
|
||
painter.draw_triangle_wave(line_start_point.to_type<int>(), line_end_point.to_type<int>(), line_color, device_line_thickness.value() + 1, device_line_thickness.value());
|
||
break;
|
||
}
|
||
}
|
||
}
|
||
|
||
static void paint_text_fragment(PaintContext& context, Layout::TextNode const& text_node, Layout::LineBoxFragment const& fragment, Painting::PaintPhase phase)
|
||
{
|
||
auto& painter = context.painter();
|
||
|
||
if (phase == Painting::PaintPhase::Foreground) {
|
||
auto fragment_absolute_rect = fragment.absolute_rect();
|
||
auto fragment_absolute_device_rect = context.enclosing_device_rect(fragment_absolute_rect);
|
||
|
||
if (text_node.document().inspected_node() == &text_node.dom_node())
|
||
context.painter().draw_rect(fragment_absolute_device_rect.to_type<int>(), Color::Magenta);
|
||
|
||
auto text = text_node.text_for_rendering();
|
||
|
||
DevicePixelPoint baseline_start { fragment_absolute_device_rect.x(), fragment_absolute_device_rect.y() + context.rounded_device_pixels(fragment.baseline()) };
|
||
Utf8View view { text.substring_view(fragment.start(), fragment.length()) };
|
||
|
||
painter.draw_text_run(baseline_start.to_type<int>(), view, fragment.layout_node().font(), text_node.computed_values().color());
|
||
|
||
auto selection_rect = context.enclosing_device_rect(fragment.selection_rect(text_node.font())).to_type<int>();
|
||
if (!selection_rect.is_empty()) {
|
||
painter.fill_rect(selection_rect, context.palette().selection());
|
||
Gfx::PainterStateSaver saver(painter);
|
||
painter.add_clip_rect(selection_rect);
|
||
painter.draw_text_run(baseline_start.to_type<int>(), view, fragment.layout_node().font(), context.palette().selection_text());
|
||
}
|
||
|
||
paint_text_decoration(context, painter, text_node, fragment);
|
||
paint_cursor_if_needed(context, text_node, fragment);
|
||
}
|
||
}
|
||
|
||
void PaintableWithLines::paint(PaintContext& context, PaintPhase phase) const
|
||
{
|
||
if (!is_visible())
|
||
return;
|
||
|
||
PaintableBox::paint(context, phase);
|
||
|
||
if (m_line_boxes.is_empty())
|
||
return;
|
||
|
||
bool should_clip_overflow = computed_values().overflow_x() != CSS::Overflow::Visible && computed_values().overflow_y() != CSS::Overflow::Visible;
|
||
Optional<BorderRadiusCornerClipper> corner_clipper;
|
||
|
||
if (should_clip_overflow) {
|
||
context.painter().save();
|
||
// FIXME: Handle overflow-x and overflow-y being different values.
|
||
auto clip_box = context.rounded_device_rect(absolute_padding_box_rect());
|
||
context.painter().add_clip_rect(clip_box.to_type<int>());
|
||
auto scroll_offset = context.rounded_device_point(static_cast<Layout::BlockContainer const&>(layout_box()).scroll_offset());
|
||
context.painter().translate(-scroll_offset.to_type<int>());
|
||
|
||
auto border_radii = normalized_border_radii_data(ShrinkRadiiForBorders::Yes);
|
||
if (border_radii.has_any_radius()) {
|
||
auto clipper = BorderRadiusCornerClipper::create(context, clip_box, border_radii);
|
||
if (!clipper.is_error()) {
|
||
corner_clipper = clipper.release_value();
|
||
corner_clipper->sample_under_corners(context.painter());
|
||
}
|
||
}
|
||
}
|
||
|
||
// Text shadows
|
||
// This is yet another loop, but done here because all shadows should appear under all text.
|
||
// So, we paint the shadows before painting any text.
|
||
// FIXME: Find a smarter way to do this?
|
||
if (phase == PaintPhase::Foreground) {
|
||
for (auto& line_box : m_line_boxes) {
|
||
for (auto& fragment : line_box.fragments()) {
|
||
if (is<Layout::TextNode>(fragment.layout_node())) {
|
||
auto& text_shadow = fragment.layout_node().computed_values().text_shadow();
|
||
if (!text_shadow.is_empty()) {
|
||
Vector<ShadowData> resolved_shadow_data;
|
||
resolved_shadow_data.ensure_capacity(text_shadow.size());
|
||
for (auto const& layer : text_shadow) {
|
||
resolved_shadow_data.empend(
|
||
layer.color,
|
||
layer.offset_x.to_px(layout_box()),
|
||
layer.offset_y.to_px(layout_box()),
|
||
layer.blur_radius.to_px(layout_box()),
|
||
layer.spread_distance.to_px(layout_box()),
|
||
ShadowPlacement::Outer);
|
||
}
|
||
context.painter().set_font(fragment.layout_node().font());
|
||
Painting::paint_text_shadow(context, fragment, resolved_shadow_data);
|
||
}
|
||
}
|
||
}
|
||
}
|
||
}
|
||
|
||
for (auto& line_box : m_line_boxes) {
|
||
for (auto& fragment : line_box.fragments()) {
|
||
if (context.should_show_line_box_borders()) {
|
||
auto fragment_absolute_rect = fragment.absolute_rect();
|
||
context.painter().draw_rect(context.enclosing_device_rect(fragment_absolute_rect).to_type<int>(), Color::Green);
|
||
context.painter().draw_line(
|
||
context.rounded_device_point(fragment_absolute_rect.top_left().translated(0, fragment.baseline())).to_type<int>(),
|
||
context.rounded_device_point(fragment_absolute_rect.top_right().translated(0, fragment.baseline())).to_type<int>(), Color::Red);
|
||
}
|
||
if (is<Layout::TextNode>(fragment.layout_node()))
|
||
paint_text_fragment(context, static_cast<Layout::TextNode const&>(fragment.layout_node()), fragment, phase);
|
||
}
|
||
}
|
||
|
||
if (should_clip_overflow) {
|
||
context.painter().restore();
|
||
if (corner_clipper.has_value())
|
||
corner_clipper->blit_corner_clipping(context.painter());
|
||
}
|
||
|
||
// FIXME: Merge this loop with the above somehow..
|
||
if (phase == PaintPhase::FocusOutline) {
|
||
for (auto& line_box : m_line_boxes) {
|
||
for (auto& fragment : line_box.fragments()) {
|
||
auto* node = fragment.layout_node().dom_node();
|
||
if (!node)
|
||
continue;
|
||
auto* parent = node->parent_element();
|
||
if (!parent)
|
||
continue;
|
||
if (parent->is_focused()) {
|
||
// FIXME: Implement this as `outline` using :focus-visible in the default UA stylesheet to make it possible to override/disable.
|
||
auto focus_outline_rect = context.enclosing_device_rect(fragment.absolute_rect()).to_type<int>().inflated(4, 4);
|
||
context.painter().draw_focus_rect(focus_outline_rect, context.palette().focus_outline());
|
||
}
|
||
}
|
||
}
|
||
}
|
||
}
|
||
|
||
bool PaintableWithLines::handle_mousewheel(Badge<EventHandler>, CSSPixelPoint, unsigned, unsigned, int wheel_delta_x, int wheel_delta_y)
|
||
{
|
||
if (!layout_box().is_scrollable())
|
||
return false;
|
||
auto new_offset = layout_box().scroll_offset();
|
||
new_offset.translate_by(wheel_delta_x, wheel_delta_y);
|
||
layout_box().set_scroll_offset(new_offset);
|
||
return true;
|
||
}
|
||
|
||
Layout::BlockContainer const& PaintableWithLines::layout_box() const
|
||
{
|
||
return static_cast<Layout::BlockContainer const&>(PaintableBox::layout_box());
|
||
}
|
||
|
||
Layout::BlockContainer& PaintableWithLines::layout_box()
|
||
{
|
||
return static_cast<Layout::BlockContainer&>(PaintableBox::layout_box());
|
||
}
|
||
|
||
void PaintableBox::set_stacking_context(NonnullOwnPtr<StackingContext> stacking_context)
|
||
{
|
||
m_stacking_context = move(stacking_context);
|
||
}
|
||
|
||
Optional<HitTestResult> PaintableBox::hit_test(CSSPixelPoint position, HitTestType type) const
|
||
{
|
||
if (!is_visible())
|
||
return {};
|
||
|
||
if (layout_box().is_initial_containing_block_box()) {
|
||
const_cast<Layout::InitialContainingBlock&>(static_cast<Layout::InitialContainingBlock const&>(layout_box())).build_stacking_context_tree_if_needed();
|
||
return stacking_context()->hit_test(position, type);
|
||
}
|
||
|
||
if (!absolute_border_box_rect().contains(position.x(), position.y()))
|
||
return {};
|
||
|
||
for (auto* child = first_child(); child; child = child->next_sibling()) {
|
||
auto result = child->hit_test(position, type);
|
||
if (!result.has_value())
|
||
continue;
|
||
if (!result->paintable->visible_for_hit_testing())
|
||
continue;
|
||
return result;
|
||
}
|
||
return HitTestResult { *this };
|
||
}
|
||
|
||
Optional<HitTestResult> PaintableWithLines::hit_test(CSSPixelPoint position, HitTestType type) const
|
||
{
|
||
if (!layout_box().children_are_inline())
|
||
return PaintableBox::hit_test(position, type);
|
||
|
||
Optional<HitTestResult> last_good_candidate;
|
||
for (auto& line_box : m_line_boxes) {
|
||
for (auto& fragment : line_box.fragments()) {
|
||
if (is<Layout::Box>(fragment.layout_node()) && static_cast<Layout::Box const&>(fragment.layout_node()).paint_box()->stacking_context())
|
||
continue;
|
||
if (!fragment.layout_node().containing_block()) {
|
||
dbgln("FIXME: PaintableWithLines::hit_test(): Missing containing block on {}", fragment.layout_node().debug_description());
|
||
continue;
|
||
}
|
||
auto fragment_absolute_rect = fragment.absolute_rect();
|
||
if (fragment_absolute_rect.contains(position)) {
|
||
if (is<Layout::BlockContainer>(fragment.layout_node()) && fragment.layout_node().paintable())
|
||
return fragment.layout_node().paintable()->hit_test(position, type);
|
||
return HitTestResult { *fragment.layout_node().paintable(), fragment.text_index_at(position.x()) };
|
||
}
|
||
|
||
// If we reached this point, the position is not within the fragment. However, the fragment start or end might be the place to place the cursor.
|
||
// This determines whether the fragment is a good candidate for the position. The last such good fragment is chosen.
|
||
// The best candidate is either the end of the line above, the beginning of the line below, or the beginning or end of the current line.
|
||
// We arbitrarily choose to consider the end of the line above and ignore the beginning of the line below.
|
||
// If we knew the direction of selection, we could make a better choice.
|
||
if (fragment_absolute_rect.bottom() <= position.y()) { // fully below the fragment
|
||
last_good_candidate = HitTestResult { *fragment.layout_node().paintable(), fragment.start() + fragment.length() };
|
||
} else if (fragment_absolute_rect.top() <= position.y()) { // vertically within the fragment
|
||
if (position.x() < fragment_absolute_rect.left()) { // left of the fragment
|
||
if (!last_good_candidate.has_value()) { // first fragment of the line
|
||
last_good_candidate = HitTestResult { *fragment.layout_node().paintable(), fragment.start() };
|
||
}
|
||
} else { // right of the fragment
|
||
last_good_candidate = HitTestResult { *fragment.layout_node().paintable(), fragment.start() + fragment.length() };
|
||
}
|
||
}
|
||
}
|
||
}
|
||
|
||
if (type == HitTestType::TextCursor && last_good_candidate.has_value())
|
||
return last_good_candidate;
|
||
if (is_visible() && absolute_border_box_rect().contains(position.x(), position.y()))
|
||
return HitTestResult { *this };
|
||
return {};
|
||
}
|
||
|
||
}
|