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Everywhere: Hoist the Libraries folder to the top-level

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Timothy Flynn 2024-11-09 12:25:08 -05:00 • committed by Andreas Kling
commit 93712b24bf
Notes: github-actions[bot] 2024-11-10 11:51:52 +00:00
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Libraries/LibWeb/Layout/LayoutState.cpp Normal file
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/*
* Copyright (c) 2022-2024, Andreas Kling <andreas@ladybird.org>
* Copyright (c) 2024, Sam Atkins <atkinssj@serenityos.org>
* Copyright (c) 2024, Aliaksandr Kalenik <kalenik.aliaksandr@gmail.com>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#include <AK/Debug.h>
#include <LibWeb/DOM/ShadowRoot.h>
#include <LibWeb/Layout/AvailableSpace.h>
#include <LibWeb/Layout/BlockContainer.h>
#include <LibWeb/Layout/InlineNode.h>
#include <LibWeb/Layout/LayoutState.h>
#include <LibWeb/Layout/Viewport.h>
#include <LibWeb/Painting/SVGPathPaintable.h>
#include <LibWeb/Painting/SVGSVGPaintable.h>
#include <LibWeb/Painting/TextPaintable.h>
namespace Web::Layout {
LayoutState::LayoutState(LayoutState const* parent)
: m_parent(parent)
, m_root(find_root())
{
}
LayoutState::~LayoutState()
{
}
LayoutState::UsedValues& LayoutState::get_mutable(NodeWithStyle const& node)
{
if (auto* used_values = used_values_per_layout_node.get(node).value_or(nullptr))
return *used_values;
for (auto const* ancestor = m_parent; ancestor; ancestor = ancestor->m_parent) {
if (auto* ancestor_used_values = ancestor->used_values_per_layout_node.get(node).value_or(nullptr)) {
auto cow_used_values = adopt_own(*new UsedValues(*ancestor_used_values));
auto* cow_used_values_ptr = cow_used_values.ptr();
used_values_per_layout_node.set(node, move(cow_used_values));
return *cow_used_values_ptr;
}
}
auto const* containing_block_used_values = node.is_viewport() ? nullptr : &get(*node.containing_block());
auto new_used_values = adopt_own(*new UsedValues);
auto* new_used_values_ptr = new_used_values.ptr();
new_used_values->set_node(const_cast<NodeWithStyle&>(node), containing_block_used_values);
used_values_per_layout_node.set(node, move(new_used_values));
return *new_used_values_ptr;
}
LayoutState::UsedValues const& LayoutState::get(NodeWithStyle const& node) const
{
if (auto const* used_values = used_values_per_layout_node.get(node).value_or(nullptr))
return *used_values;
for (auto const* ancestor = m_parent; ancestor; ancestor = ancestor->m_parent) {
if (auto const* ancestor_used_values = ancestor->used_values_per_layout_node.get(node).value_or(nullptr))
return *ancestor_used_values;
}
auto const* containing_block_used_values = node.is_viewport() ? nullptr : &get(*node.containing_block());
auto new_used_values = adopt_own(*new UsedValues);
auto* new_used_values_ptr = new_used_values.ptr();
new_used_values->set_node(const_cast<NodeWithStyle&>(node), containing_block_used_values);
const_cast<LayoutState*>(this)->used_values_per_layout_node.set(node, move(new_used_values));
return *new_used_values_ptr;
}
// https://www.w3.org/TR/css-overflow-3/#scrollable-overflow
static CSSPixelRect measure_scrollable_overflow(Box const& box)
{
if (!box.paintable_box())
return {};
auto& paintable_box = const_cast<Painting::PaintableBox&>(*box.paintable_box());
if (paintable_box.scrollable_overflow_rect().has_value())
return paintable_box.scrollable_overflow_rect().value();
// The scrollable overflow area is the union of:
// - The scroll container’s own padding box.
auto scrollable_overflow_rect = paintable_box.absolute_padding_box_rect();
// - All line boxes directly contained by the scroll container.
if (is<Painting::PaintableWithLines>(box.first_paintable())) {
for (auto const& fragment : static_cast<Painting::PaintableWithLines const&>(*box.first_paintable()).fragments()) {
scrollable_overflow_rect = scrollable_overflow_rect.united(fragment.absolute_rect());
}
}
auto content_overflow_rect = scrollable_overflow_rect;
// - The border boxes of all boxes for which it is the containing block
// and whose border boxes are positioned not wholly in the negative scrollable overflow region,
// FIXME: accounting for transforms by projecting each box onto the plane of the element that establishes its 3D rendering context. [CSS3-TRANSFORMS]
if (!box.children_are_inline()) {
box.for_each_in_subtree_of_type<Box>([&box, &scrollable_overflow_rect, &content_overflow_rect](Box const& child) {
if (!child.paintable_box())
return TraversalDecision::Continue;
if (child.containing_block() != &box)
return TraversalDecision::Continue;
auto child_border_box = child.paintable_box()->absolute_border_box_rect();
// NOTE: Here we check that the child is not wholly in the negative scrollable overflow region.
if (child_border_box.bottom() < 0 || child_border_box.right() < 0)
return TraversalDecision::Continue;
scrollable_overflow_rect = scrollable_overflow_rect.united(child_border_box);
content_overflow_rect = content_overflow_rect.united(child_border_box);
// - The scrollable overflow areas of all of the above boxes
// (including zero-area boxes and accounting for transforms as described above),
// provided they themselves have overflow: visible (i.e. do not themselves trap the overflow)
// and that scrollable overflow is not already clipped (e.g. by the clip property or the contain property).
if (is<Viewport>(box) || child.computed_values().overflow_x() == CSS::Overflow::Visible || child.computed_values().overflow_y() == CSS::Overflow::Visible) {
auto child_scrollable_overflow = measure_scrollable_overflow(child);
if (is<Viewport>(box) || child.computed_values().overflow_x() == CSS::Overflow::Visible)
scrollable_overflow_rect.unite_horizontally(child_scrollable_overflow);
if (is<Viewport>(box) || child.computed_values().overflow_y() == CSS::Overflow::Visible)
scrollable_overflow_rect.unite_vertically(child_scrollable_overflow);
}
return TraversalDecision::Continue;
});
}
// FIXME: - The margin areas of grid item and flex item boxes for which the box establishes a containing block.
// - Additional padding added to the end-side of the scrollable overflow rectangle as necessary
// to enable a scroll position that satisfies the requirements of place-content: end alignment.
auto has_scrollable_overflow = !paintable_box.absolute_padding_box_rect().contains(scrollable_overflow_rect);
if (has_scrollable_overflow) {
scrollable_overflow_rect.set_height(max(scrollable_overflow_rect.height(), content_overflow_rect.height() + box.box_model().padding.bottom));
}
paintable_box.set_overflow_data(Painting::PaintableBox::OverflowData {
.scrollable_overflow_rect = scrollable_overflow_rect,
.has_scrollable_overflow = has_scrollable_overflow,
});
return scrollable_overflow_rect;
}
void LayoutState::resolve_relative_positions()
{
// This function resolves relative position offsets of fragments that belong to inline paintables.
// It runs *after* the paint tree has been constructed, so it modifies paintable node & fragment offsets directly.
for (auto& it : used_values_per_layout_node) {
auto& used_values = *it.value;
auto& node = const_cast<NodeWithStyle&>(used_values.node());
for (auto& paintable : node.paintables()) {
if (!(is<Painting::PaintableWithLines>(paintable) && is<Layout::InlineNode>(paintable.layout_node())))
continue;
auto const& inline_paintable = static_cast<Painting::PaintableWithLines&>(paintable);
for (auto& fragment : inline_paintable.fragments()) {
auto const& fragment_node = fragment.layout_node();
if (!is<Layout::NodeWithStyleAndBoxModelMetrics>(*fragment_node.parent()))
continue;
// Collect effective relative position offset from inline-flow parent chain.
CSSPixelPoint offset;
for (auto* ancestor = fragment_node.parent(); ancestor; ancestor = ancestor->parent()) {
if (!is<Layout::NodeWithStyleAndBoxModelMetrics>(*ancestor))
break;
if (!ancestor->display().is_inline_outside() || !ancestor->display().is_flow_inside())
break;
if (ancestor->computed_values().position() == CSS::Positioning::Relative) {
auto const& ancestor_node = static_cast<Layout::NodeWithStyleAndBoxModelMetrics const&>(*ancestor);
auto const& inset = ancestor_node.box_model().inset;
offset.translate_by(inset.left, inset.top);
}
}
const_cast<Painting::PaintableFragment&>(fragment).set_offset(fragment.offset().translated(offset));
}
}
}
}
static void build_paint_tree(Node& node, Painting::Paintable* parent_paintable = nullptr)
{
for (auto& paintable : node.paintables()) {
if (parent_paintable && !paintable.forms_unconnected_subtree()) {
VERIFY(!paintable.parent());
parent_paintable->append_child(paintable);
}
paintable.set_dom_node(node.dom_node());
if (node.dom_node())
node.dom_node()->set_paintable(paintable);
}
for (auto* child = node.first_child(); child; child = child->next_sibling()) {
build_paint_tree(*child, node.first_paintable());
}
}
void LayoutState::commit(Box& root)
{
// Only the top-level LayoutState should ever be committed.
VERIFY(!m_parent);
// NOTE: In case this is a relayout of an existing tree, we start by detaching the old paint tree
// from the layout tree. This is done to ensure that we don't end up with any old-tree pointers
// when text paintables shift around in the tree.
root.for_each_in_inclusive_subtree([&](Layout::Node& node) {
node.clear_paintables();
return TraversalDecision::Continue;
});
HashTable<Layout::InlineNode*> inline_nodes;
root.document().for_each_shadow_including_inclusive_descendant([&](DOM::Node& node) {
node.clear_paintable();
if (node.layout_node() && is<InlineNode>(node.layout_node())) {
inline_nodes.set(static_cast<InlineNode*>(node.layout_node()));
}
return TraversalDecision::Continue;
});
HashTable<Layout::TextNode*> text_nodes;
HashTable<Painting::PaintableWithLines*> inline_node_paintables;
auto try_to_relocate_fragment_in_inline_node = [&](auto& fragment, size_t line_index) -> bool {
for (auto const* parent = fragment.layout_node().parent(); parent; parent = parent->parent()) {
if (is<InlineNode>(*parent)) {
auto& inline_node = const_cast<InlineNode&>(static_cast<InlineNode const&>(*parent));
auto line_paintable = inline_node.create_paintable_for_line_with_index(line_index);
line_paintable->add_fragment(fragment);
if (!inline_node_paintables.contains(line_paintable.ptr())) {
inline_node_paintables.set(line_paintable.ptr());
inline_node.add_paintable(line_paintable);
}
return true;
}
}
return false;
};
for (auto& it : used_values_per_layout_node) {
auto& used_values = *it.value;
auto& node = const_cast<NodeWithStyle&>(used_values.node());
if (is<NodeWithStyleAndBoxModelMetrics>(node)) {
// Transfer box model metrics.
auto& box_model = static_cast<NodeWithStyleAndBoxModelMetrics&>(node).box_model();
box_model.inset = { used_values.inset_top, used_values.inset_right, used_values.inset_bottom, used_values.inset_left };
box_model.padding = { used_values.padding_top, used_values.padding_right, used_values.padding_bottom, used_values.padding_left };
box_model.border = { used_values.border_top, used_values.border_right, used_values.border_bottom, used_values.border_left };
box_model.margin = { used_values.margin_top, used_values.margin_right, used_values.margin_bottom, used_values.margin_left };
}
auto paintable = node.create_paintable();
node.add_paintable(paintable);
// For boxes, transfer all the state needed for painting.
if (paintable && is<Painting::PaintableBox>(*paintable)) {
auto& paintable_box = static_cast<Painting::PaintableBox&>(*paintable);
paintable_box.set_offset(used_values.offset);
paintable_box.set_content_size(used_values.content_width(), used_values.content_height());
if (used_values.override_borders_data().has_value()) {
paintable_box.set_override_borders_data(used_values.override_borders_data().value());
}
if (used_values.table_cell_coordinates().has_value()) {
paintable_box.set_table_cell_coordinates(used_values.table_cell_coordinates().value());
}
if (is<Painting::PaintableWithLines>(paintable_box)) {
auto& paintable_with_lines = static_cast<Painting::PaintableWithLines&>(paintable_box);
for (size_t line_index = 0; line_index < used_values.line_boxes.size(); ++line_index) {
auto& line_box = used_values.line_boxes[line_index];
for (auto& fragment : line_box.fragments()) {
if (fragment.layout_node().is_text_node())
text_nodes.set(static_cast<Layout::TextNode*>(const_cast<Layout::Node*>(&fragment.layout_node())));
auto did_relocate_fragment = try_to_relocate_fragment_in_inline_node(fragment, line_index);
if (!did_relocate_fragment) {
paintable_with_lines.add_fragment(fragment);
}
}
}
}
if (used_values.computed_svg_transforms().has_value() && is<Painting::SVGGraphicsPaintable>(paintable_box)) {
auto& svg_graphics_paintable = static_cast<Painting::SVGGraphicsPaintable&>(paintable_box);
svg_graphics_paintable.set_computed_transforms(*used_values.computed_svg_transforms());
}
if (used_values.computed_svg_path().has_value() && is<Painting::SVGPathPaintable>(paintable_box)) {
auto& svg_geometry_paintable = static_cast<Painting::SVGPathPaintable&>(paintable_box);
svg_geometry_paintable.set_computed_path(move(*used_values.computed_svg_path()));
}
if (node.display().is_grid_inside()) {
paintable_box.set_used_values_for_grid_template_columns(used_values.grid_template_columns());
paintable_box.set_used_values_for_grid_template_rows(used_values.grid_template_rows());
}
}
}
// Create paintables for inline nodes without fragments to make possible querying their geometry.
for (auto& inline_node : inline_nodes) {
auto* paintable = inline_node->first_paintable();
if (paintable)
continue;
paintable = inline_node->create_paintable_for_line_with_index(0);
inline_node->add_paintable(paintable);
}
// Resolve relative positions for regular boxes (not line box fragments):
// NOTE: This needs to occur before fragments are transferred into the corresponding inline paintables, because
// after this transfer, the containing_line_box_fragment will no longer be valid.
for (auto& it : used_values_per_layout_node) {
auto& used_values = *it.value;
auto& node = const_cast<NodeWithStyle&>(used_values.node());
if (!node.is_box())
continue;
auto& paintable = static_cast<Painting::PaintableBox&>(*node.first_paintable());
CSSPixelPoint offset;
if (used_values.containing_line_box_fragment.has_value()) {
// Atomic inline case:
// We know that `node` is an atomic inline because `containing_line_box_fragments` refers to the
// line box fragment in the parent block container that contains it.
auto const& containing_line_box_fragment = used_values.containing_line_box_fragment.value();
auto const& containing_block = *node.containing_block();
auto const& containing_block_used_values = get(containing_block);
auto const& fragment = containing_block_used_values.line_boxes[containing_line_box_fragment.line_box_index].fragments()[containing_line_box_fragment.fragment_index];
// The fragment has the final offset for the atomic inline, so we just need to copy it from there.
offset = fragment.offset();
} else {
// Not an atomic inline, much simpler case.
offset = used_values.offset;
}
// Apply relative position inset if appropriate.
if (node.computed_values().position() == CSS::Positioning::Relative && is<NodeWithStyleAndBoxModelMetrics>(node)) {
auto const& inset = static_cast<NodeWithStyleAndBoxModelMetrics const&>(node).box_model().inset;
offset.translate_by(inset.left, inset.top);
}
paintable.set_offset(offset);
}
for (auto* text_node : text_nodes) {
text_node->add_paintable(text_node->create_paintable());
auto* paintable = text_node->first_paintable();
auto const& font = text_node->first_available_font();
auto const glyph_height = CSSPixels::nearest_value_for(font.pixel_size());
auto const css_line_thickness = [&] {
auto computed_thickness = text_node->computed_values().text_decoration_thickness().resolved(*text_node, CSS::Length(1, CSS::Length::Type::Em).to_px(*text_node));
if (computed_thickness.is_auto())
return max(glyph_height.scaled(0.1), 1);
return computed_thickness.to_px(*text_node);
}();
auto& text_paintable = static_cast<Painting::TextPaintable&>(*paintable);
text_paintable.set_text_decoration_thickness(css_line_thickness);
}
build_paint_tree(root);
resolve_relative_positions();
// Measure size of paintables created for inline nodes.
for (auto& paintable_with_lines : inline_node_paintables) {
if (!is<InlineNode>(paintable_with_lines->layout_node())) {
continue;
}
auto const& fragments = paintable_with_lines->fragments();
if (fragments.is_empty()) {
continue;
}
paintable_with_lines->set_offset(fragments.first().offset());
CSSPixelSize size;
for (auto const& fragment : fragments) {
size.set_width(size.width() + fragment.width());
size.set_height(max(size.height(), fragment.height()));
}
paintable_with_lines->set_content_size(size.width(), size.height());
}
// Measure overflow in scroll containers.
for (auto& it : used_values_per_layout_node) {
auto& used_values = *it.value;
if (!used_values.node().is_box())
continue;
auto const& box = static_cast<Layout::Box const&>(used_values.node());
measure_scrollable_overflow(box);
// The scroll offset can become invalid if the scrollable overflow rectangle has changed after layout.
// For example, if the scroll container has been scrolled to the very end and is then resized to become larger
// (scrollable overflow rect become smaller), the scroll offset would be out of bounds.
auto& paintable_box = const_cast<Painting::PaintableBox&>(*box.paintable_box());
if (!paintable_box.scroll_offset().is_zero())
paintable_box.set_scroll_offset(paintable_box.scroll_offset());
}
for (auto& it : used_values_per_layout_node) {
auto& used_values = *it.value;
if (!used_values.node().is_box())
continue;
auto const& box = static_cast<Layout::Box const&>(used_values.node());
auto& paintable_box = const_cast<Painting::PaintableBox&>(*box.paintable_box());
if (box.is_sticky_position()) {
// https://drafts.csswg.org/css-position/#insets
// For sticky positioned boxes, the inset is instead relative to the relevant scrollport’s size. Negative values are allowed.
auto sticky_insets = make<Painting::PaintableBox::StickyInsets>();
auto const& inset = box.computed_values().inset();
auto const* nearest_scrollable_ancestor = paintable_box.nearest_scrollable_ancestor();
CSSPixelSize scrollport_size;
if (nearest_scrollable_ancestor) {
scrollport_size = nearest_scrollable_ancestor->absolute_rect().size();
}
if (!inset.top().is_auto()) {
sticky_insets->top = inset.top().to_px(box, scrollport_size.height());
}
if (!inset.right().is_auto()) {
sticky_insets->right = inset.right().to_px(box, scrollport_size.width());
}
if (!inset.bottom().is_auto()) {
sticky_insets->bottom = inset.bottom().to_px(box, scrollport_size.height());
}
if (!inset.left().is_auto()) {
sticky_insets->left = inset.left().to_px(box, scrollport_size.width());
}
paintable_box.set_sticky_insets(move(sticky_insets));
}
}
}
void LayoutState::UsedValues::set_node(NodeWithStyle& node, UsedValues const* containing_block_used_values)
{
m_node = &node;
m_containing_block_used_values = containing_block_used_values;
// NOTE: In the code below, we decide if `node` has definite width and/or height.
// This attempts to cover all the *general* cases where CSS considers sizes to be definite.
// If `node` has definite values for min/max-width or min/max-height and a definite
// preferred size in the same axis, we clamp the preferred size here as well.
//
// There are additional cases where CSS considers values to be definite. We model all of
// those by having our engine consider sizes to be definite *once they are assigned to
// the UsedValues by calling set_content_width() or set_content_height().
auto const& computed_values = node.computed_values();
auto adjust_for_box_sizing = [&](CSSPixels unadjusted_pixels, CSS::Size const& computed_size, bool width) -> CSSPixels {
// box-sizing: content-box and/or automatic size don't require any adjustment.
if (computed_values.box_sizing() == CSS::BoxSizing::ContentBox || computed_size.is_auto())
return unadjusted_pixels;
// box-sizing: border-box requires us to subtract the relevant border and padding from the size.
CSSPixels border_and_padding;
if (width) {
border_and_padding = computed_values.border_left().width
+ computed_values.padding().left().to_px(*m_node, containing_block_used_values->content_width())
+ computed_values.border_right().width
+ computed_values.padding().right().to_px(*m_node, containing_block_used_values->content_width());
} else {
border_and_padding = computed_values.border_top().width
+ computed_values.padding().top().to_px(*m_node, containing_block_used_values->content_width())
+ computed_values.border_bottom().width
+ computed_values.padding().bottom().to_px(*m_node, containing_block_used_values->content_width());
}
return unadjusted_pixels - border_and_padding;
};
auto is_definite_size = [&](CSS::Size const& size, CSSPixels& resolved_definite_size, bool width) {
// A size that can be determined without performing layout; that is,
// a <length>,
// a measure of text (without consideration of line-wrapping),
// a size of the initial containing block,
// or a <percentage> or other formula (such as the “stretch-fit” sizing of non-replaced blocks [CSS2]) that is resolved solely against definite sizes.
auto containing_block_has_definite_size = containing_block_used_values ? (width ? containing_block_used_values->has_definite_width() : containing_block_used_values->has_definite_height()) : false;
if (size.is_auto()) {
// NOTE: The width of a non-flex-item block is considered definite if it's auto and the containing block has definite width.
if (width
&& !node.is_floating()
&& !node.is_absolutely_positioned()
&& node.display().is_block_outside()
&& node.parent()
&& !node.parent()->is_floating()
&& (node.parent()->display().is_flow_root_inside()
|| node.parent()->display().is_flow_inside())) {
if (containing_block_has_definite_size) {
CSSPixels available_width = containing_block_used_values->content_width();
resolved_definite_size = available_width
- margin_left
- margin_right
- padding_left
- padding_right
- border_left
- border_right;
return true;
}
return false;
}
return false;
}
if (size.is_calculated()) {
if (size.calculated().contains_percentage()) {
if (!containing_block_has_definite_size)
return false;
auto containing_block_size_as_length = width ? containing_block_used_values->content_width() : containing_block_used_values->content_height();
resolved_definite_size = adjust_for_box_sizing(size.calculated().resolve_length_percentage(node, containing_block_size_as_length).value_or(CSS::Length::make_auto()).to_px(node), size, width);
return true;
}
resolved_definite_size = adjust_for_box_sizing(size.calculated().resolve_length(node)->to_px(node), size, width);
return true;
}
if (size.is_length()) {
VERIFY(!size.is_auto()); // This should have been covered by the Size::is_auto() branch above.
resolved_definite_size = adjust_for_box_sizing(size.length().to_px(node), size, width);
return true;
}
if (size.is_percentage()) {
if (containing_block_has_definite_size) {
auto containing_block_size = width ? containing_block_used_values->content_width() : containing_block_used_values->content_height();
resolved_definite_size = adjust_for_box_sizing(containing_block_size.scaled(size.percentage().as_fraction()), size, width);
return true;
}
return false;
}
return false;
};
CSSPixels min_width = 0;
bool has_definite_min_width = is_definite_size(computed_values.min_width(), min_width, true);
CSSPixels max_width = 0;
bool has_definite_max_width = is_definite_size(computed_values.max_width(), max_width, true);
CSSPixels min_height = 0;
bool has_definite_min_height = is_definite_size(computed_values.min_height(), min_height, false);
CSSPixels max_height = 0;
bool has_definite_max_height = is_definite_size(computed_values.max_height(), max_height, false);
m_has_definite_width = is_definite_size(computed_values.width(), m_content_width, true);
m_has_definite_height = is_definite_size(computed_values.height(), m_content_height, false);
// For boxes with a preferred aspect ratio and one definite size, we can infer the other size
// and consider it definite since this did not require performing layout.
if (is<Box>(node)) {
auto const& box = static_cast<Box const&>(node);
if (auto aspect_ratio = box.preferred_aspect_ratio(); aspect_ratio.has_value()) {
if (m_has_definite_width && m_has_definite_height) {
// Both width and height are definite.
} else if (m_has_definite_width) {
m_content_height = m_content_width / *aspect_ratio;
m_has_definite_height = true;
} else if (m_has_definite_height) {
m_content_width = m_content_height * *aspect_ratio;
m_has_definite_width = true;
}
}
}
if (m_has_definite_width) {
if (has_definite_min_width)
m_content_width = max(min_width, m_content_width);
if (has_definite_max_width)
m_content_width = min(max_width, m_content_width);
}
if (m_has_definite_height) {
if (has_definite_min_height)
m_content_height = max(min_height, m_content_height);
if (has_definite_max_height)
m_content_height = min(max_height, m_content_height);
}
}
void LayoutState::UsedValues::set_content_width(CSSPixels width)
{
VERIFY(!width.might_be_saturated());
if (width < 0) {
// Negative widths are not allowed in CSS. We have a bug somewhere! Clamp to 0 to avoid doing too much damage.
dbgln_if(LIBWEB_CSS_DEBUG, "FIXME: Layout calculated a negative width for {}: {}", m_node->debug_description(), width);
width = 0;
}
m_content_width = width;
// FIXME: We should not do this! Definiteness of widths should be determined early,
// and not changed later (except for some special cases in flex layout..)
m_has_definite_width = true;
}
void LayoutState::UsedValues::set_content_height(CSSPixels height)
{
VERIFY(!height.might_be_saturated());
if (height < 0) {
// Negative heights are not allowed in CSS. We have a bug somewhere! Clamp to 0 to avoid doing too much damage.
dbgln_if(LIBWEB_CSS_DEBUG, "FIXME: Layout calculated a negative height for {}: {}", m_node->debug_description(), height);
height = 0;
}
m_content_height = height;
}
void LayoutState::UsedValues::set_temporary_content_width(CSSPixels width)
{
m_content_width = width;
}
void LayoutState::UsedValues::set_temporary_content_height(CSSPixels height)
{
m_content_height = height;
}
AvailableSize LayoutState::UsedValues::available_width_inside() const
{
if (width_constraint == SizeConstraint::MinContent)
return AvailableSize::make_min_content();
if (width_constraint == SizeConstraint::MaxContent)
return AvailableSize::make_max_content();
if (has_definite_width())
return AvailableSize::make_definite(m_content_width);
return AvailableSize::make_indefinite();
}
AvailableSize LayoutState::UsedValues::available_height_inside() const
{
if (height_constraint == SizeConstraint::MinContent)
return AvailableSize::make_min_content();
if (height_constraint == SizeConstraint::MaxContent)
return AvailableSize::make_max_content();
if (has_definite_height())
return AvailableSize::make_definite(m_content_height);
return AvailableSize::make_indefinite();
}
AvailableSpace LayoutState::UsedValues::available_inner_space_or_constraints_from(AvailableSpace const& outer_space) const
{
auto inner_width = available_width_inside();
auto inner_height = available_height_inside();
if (inner_width.is_indefinite() && outer_space.width.is_intrinsic_sizing_constraint())
inner_width = outer_space.width;
if (inner_height.is_indefinite() && outer_space.height.is_intrinsic_sizing_constraint())
inner_height = outer_space.height;
return AvailableSpace(inner_width, inner_height);
}
void LayoutState::UsedValues::set_content_offset(CSSPixelPoint new_offset)
{
set_content_x(new_offset.x());
set_content_y(new_offset.y());
}
void LayoutState::UsedValues::set_content_x(CSSPixels x)
{
offset.set_x(x);
}
void LayoutState::UsedValues::set_content_y(CSSPixels y)
{
offset.set_y(y);
}
void LayoutState::UsedValues::set_indefinite_content_width()
{
m_has_definite_width = false;
}
void LayoutState::UsedValues::set_indefinite_content_height()
{
m_has_definite_height = false;
}
}