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LibWeb: Treat unresolvable percentages as auto to resolve sizes in GFC

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Fixes the bug that currently we always consider tracks with percentage
size as ones with "fixed" length even when available size is not
definite. With this change tracks with percentage size when available
size is not definite will be considered as "intrinsic" sized.
This commit is contained in:
Aliaksandr Kalenik 2023-05-28 19:31:26 +03:00 • committed by Andreas Kling
parent 30feb95d53
commit 537256fae2
6 changed files with 73 additions and 58 deletions
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10
Tests/LibWeb/Layout/expected/grid/unresolvable-percentage-track.txt Normal file
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@ -0,0 +1,10 @@
Viewport <#document> at (0,0) content-size 800x600 children: not-inline
BlockContainer <html> at (0,0) content-size 800x600 [BFC] children: not-inline
BlockContainer <body> at (8,8) content-size 784x17.46875 children: not-inline
Box <div.ipc-page-grid> at (8,8) content-size 784x17.46875 flex-container(row) [FFC] children: not-inline
Box <div.ipc-sub-grid> at (8,8) content-size 36.84375x17.46875 flex-item [GFC] children: not-inline
BlockContainer <div> at (8,8) content-size 36.84375x17.46875 [BFC] children: inline
line 0 width: 36.84375, height: 17.46875, bottom: 17.46875, baseline: 13.53125
frag 0 from TextNode start: 0, length: 5, rect: [8,8 36.84375x17.46875]
"hello"
TextNode <#text>

11
Tests/LibWeb/Layout/input/grid/unresolvable-percentage-track.html Normal file
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@ -0,0 +1,11 @@
<style>
.ipc-page-grid {
display: flex;
}
.ipc-sub-grid {
display: grid;
grid-template-columns: 100%;
}
</style>
<div class="ipc-page-grid"><div class="ipc-sub-grid"><div>hello</div></div></div>

27
Userland/Libraries/LibWeb/CSS/GridTrackSize.cpp
View file

@ -36,6 +36,33 @@ GridSize::GridSize()
GridSize::~GridSize() = default;
bool GridSize::is_auto(Layout::AvailableSize const& available_size) const
{
if (m_type == Type::LengthPercentage) {
if (m_length_percentage.is_percentage())
return !available_size.is_definite();
return m_length_percentage.is_auto();
}
return false;
}
bool GridSize::is_fixed(Layout::AvailableSize const& available_size) const
{
if (m_type == Type::LengthPercentage) {
if (m_length_percentage.is_percentage())
return available_size.is_definite();
return !m_length_percentage.is_auto();
}
return false;
}
bool GridSize::is_intrinsic(Layout::AvailableSize const& available_size) const
{
return is_auto(available_size) || is_max_content() || is_min_content();
}
GridSize GridSize::make_auto()
{
return GridSize(CSS::Length::make_auto());

10
Userland/Libraries/LibWeb/CSS/GridTrackSize.h
View file

@ -8,6 +8,7 @@
#include <AK/Vector.h>
#include <LibWeb/CSS/PercentageOr.h>
#include <LibWeb/Layout/AvailableSpace.h>
namespace Web::CSS {
@ -30,8 +31,8 @@ public:
Type type() const { return m_type; }
bool is_auto() const { return m_type == Type::LengthPercentage && m_length_percentage.is_auto(); }
bool is_length_percentage() const { return m_type == Type::LengthPercentage; }
bool is_auto(Layout::AvailableSize const&) const;
bool is_fixed(Layout::AvailableSize const&) const;
bool is_flexible_length() const { return m_type == Type::FlexibleLength; }
bool is_max_content() const { return m_type == Type::MaxContent; }
bool is_min_content() const { return m_type == Type::MinContent; }
@ -42,10 +43,7 @@ public:
// https://www.w3.org/TR/css-grid-2/#layout-algorithm
// An intrinsic sizing function (min-content, max-content, auto, fit-content()).
// FIXME: Add missing properties once implemented.
bool is_intrinsic_track_sizing() const
{
return is_auto() || is_max_content() || is_min_content();
}
bool is_intrinsic(Layout::AvailableSize const&) const;
bool is_definite() const
{

71
Userland/Libraries/LibWeb/Layout/GridFormattingContext.cpp
View file

@ -630,59 +630,23 @@ void GridFormattingContext::initialize_track_sizes(AvailableSpace const& availab
auto& tracks_and_gaps = dimension == GridDimension::Column ? m_grid_columns_and_gaps : m_grid_rows_and_gaps;
auto& available_size = dimension == GridDimension::Column ? available_space.width : available_space.height;
// For each track, if the track’s min track sizing function is:
for (auto& track : tracks_and_gaps) {
if (track.is_gap)
continue;
switch (track.min_track_sizing_function.type()) {
// - A fixed sizing function
// Resolve to an absolute length and use that size as the track’s initial base size.
case CSS::GridSize::Type::LengthPercentage: {
if (!track.min_track_sizing_function.is_auto()) {
track.base_size = track.min_track_sizing_function.css_size().to_px(grid_container(), available_size.to_px());
}
break;
}
// - An intrinsic sizing function
// Use an initial base size of zero.
case CSS::GridSize::Type::FlexibleLength:
case CSS::GridSize::Type::MaxContent:
case CSS::GridSize::Type::MinContent: {
if (track.min_track_sizing_function.is_fixed(available_size)) {
track.base_size = track.min_track_sizing_function.css_size().to_px(grid_container(), available_size.to_px());
} else if (track.min_track_sizing_function.is_intrinsic(available_size)) {
track.base_size = 0;
break;
}
default:
VERIFY_NOT_REACHED();
}
// For each track, if the track’s max track sizing function is:
switch (track.max_track_sizing_function.type()) {
// - A fixed sizing function
// Resolve to an absolute length and use that size as the track’s initial growth limit.
case CSS::GridSize::Type::LengthPercentage: {
if (!track.max_track_sizing_function.is_auto()) {
track.growth_limit = track.max_track_sizing_function.css_size().to_px(grid_container(), available_size.to_px());
} else {
track.growth_limit = INFINITY;
}
break;
}
// - A flexible sizing function
// Use an initial growth limit of infinity.
case CSS::GridSize::Type::FlexibleLength: {
if (track.max_track_sizing_function.is_fixed(available_size)) {
track.growth_limit = track.max_track_sizing_function.css_size().to_px(grid_container(), available_size.to_px());
} else if (track.max_track_sizing_function.is_flexible_length()) {
track.growth_limit = INFINITY;
break;
}
// - An intrinsic sizing function
// Use an initial growth limit of infinity.
case CSS::GridSize::Type::MaxContent:
case CSS::GridSize::Type::MinContent: {
} else if (track.max_track_sizing_function.is_intrinsic(available_size)) {
track.growth_limit = INFINITY;
break;
}
default:
} else {
VERIFY_NOT_REACHED();
}
@ -891,7 +855,7 @@ void GridFormattingContext::increase_sizes_to_accommodate_spanning_items_crossin
// function by distributing extra space as needed to accommodate these items’ minimum contributions.
Vector<TemporaryTrack&> intrinsic_minimum_spanned_tracks;
for (auto& track : spanned_tracks) {
if (track.min_track_sizing_function.is_intrinsic_track_sizing())
if (track.min_track_sizing_function.is_intrinsic(available_size))
intrinsic_minimum_spanned_tracks.append(track);
}
auto item_size_contribution = [&] {
@ -929,7 +893,7 @@ void GridFormattingContext::increase_sizes_to_accommodate_spanning_items_crossin
if (available_size.is_max_content()) {
Vector<TemporaryTrack&> max_content_minimum_tracks;
for (auto& track : spanned_tracks) {
if (track.min_track_sizing_function.is_auto() || track.min_track_sizing_function.is_max_content()) {
if (track.min_track_sizing_function.is_auto(available_size) || track.min_track_sizing_function.is_max_content()) {
max_content_minimum_tracks.append(track);
}
}
@ -951,7 +915,7 @@ void GridFormattingContext::increase_sizes_to_accommodate_spanning_items_crossin
// 5. For intrinsic maximums: Next increase the growth limit of tracks with an intrinsic max track sizing
Vector<TemporaryTrack&> intrinsic_maximum_tracks;
for (auto& track : spanned_tracks) {
if (track.max_track_sizing_function.is_intrinsic_track_sizing()) {
if (track.max_track_sizing_function.is_intrinsic(available_size)) {
intrinsic_maximum_tracks.append(track);
}
}
@ -974,7 +938,7 @@ void GridFormattingContext::increase_sizes_to_accommodate_spanning_items_crossin
// content contributions.
Vector<TemporaryTrack&> max_content_maximum_tracks;
for (auto& track : spanned_tracks) {
if (track.max_track_sizing_function.is_max_content() || track.max_track_sizing_function.is_auto()) {
if (track.max_track_sizing_function.is_max_content() || track.max_track_sizing_function.is_auto(available_size)) {
max_content_maximum_tracks.append(track);
}
}
@ -1183,19 +1147,19 @@ void GridFormattingContext::stretch_auto_tracks(AvailableSpace const& available_
// step instead.
CSSPixels used_space = 0;
for (auto& track : tracks_and_gaps) {
if (!track.max_track_sizing_function.is_auto())
if (!track.max_track_sizing_function.is_auto(available_size))
used_space += track.base_size;
}
CSSPixels remaining_space = available_size.is_definite() ? available_size.to_px() - used_space : 0;
auto count_of_auto_max_sizing_tracks = 0;
for (auto& track : tracks_and_gaps) {
if (track.max_track_sizing_function.is_auto())
if (track.max_track_sizing_function.is_auto(available_size))
count_of_auto_max_sizing_tracks++;
}
for (auto& track : tracks_and_gaps) {
if (track.max_track_sizing_function.is_auto())
if (track.max_track_sizing_function.is_auto(available_size))
track.base_size = max(track.base_size, remaining_space / count_of_auto_max_sizing_tracks);
}
}
@ -1424,6 +1388,8 @@ void GridFormattingContext::resolve_grid_item_heights()
void GridFormattingContext::run(Box const& box, LayoutMode, AvailableSpace const& available_space)
{
m_available_space = available_space;
place_grid_items(available_space);
initialize_grid_tracks_for_columns_and_rows(available_space);
@ -1812,7 +1778,8 @@ CSSPixels GridFormattingContext::automatic_minimum_size(GridItem const& item, Gr
auto item_track_index = item.raw_position(dimension);
// FIXME: Check all tracks spanned by an item
auto item_spans_auto_tracks = tracks[item_track_index].min_track_sizing_function.is_auto();
AvailableSize const& available_size = dimension == GridDimension::Column ? m_available_space->width : m_available_space->height;
auto item_spans_auto_tracks = tracks[item_track_index].min_track_sizing_function.is_auto(available_size);
if (item_spans_auto_tracks && !item.box().is_scroll_container()) {
return item.add_border_box_sizes(content_based_minimum_size(item, dimension), dimension, m_state);
}

2
Userland/Libraries/LibWeb/Layout/GridFormattingContext.h
View file

@ -201,6 +201,8 @@ private:
Vector<GridItem> m_grid_items;
Vector<JS::NonnullGCPtr<Box const>> m_boxes_to_place;
Optional<AvailableSpace> m_available_space;
void determine_grid_container_height();
void determine_intrinsic_size_of_grid_container(AvailableSpace const& available_space);