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LibWeb: Remove now-unused CSS::PositionValue type and associated parsing

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All the users now use PositionStyleValue instead.
This commit is contained in:
Sam Atkins 2023-11-06 15:57:05 +00:00 committed by Sam Atkins
parent 7bcabbb325
commit 763b08c23f
Notes: sideshowbarker 2024-07-18 00:41:35 +09:00 
Author: https://github.com/AtkinsSJ
Commit: https://github.com/SerenityOS/serenity/commit/763b08c23f
Pull-request: https://github.com/SerenityOS/serenity/pull/21829
6 changed files with 0 additions and 373 deletions
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1
Meta/gn/secondary/Userland/Libraries/LibWeb/CSS/BUILD.gn
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@ -40,7 +40,6 @@ source_set("CSS") {
"MediaQueryList.cpp",
"MediaQueryListEvent.cpp",
"PercentageOr.cpp",
"Position.cpp",
"PreferredColorScheme.cpp",
"Ratio.cpp",
"Resolution.cpp",

1
Userland/Libraries/LibWeb/CMakeLists.txt
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@ -67,7 +67,6 @@ set(SOURCES
CSS/Parser/Token.cpp
CSS/Parser/Tokenizer.cpp
CSS/PercentageOr.cpp
CSS/Position.cpp
CSS/PreferredColorScheme.cpp
CSS/Ratio.cpp
CSS/Resolution.cpp

214
Userland/Libraries/LibWeb/CSS/Parser/Parser.cpp
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@ -1189,220 +1189,6 @@ RefPtr<StyleValue> Parser::parse_url_value(ComponentValue const& component_value
return URLStyleValue::create(*url);
}
Optional<PositionValue> Parser::parse_position(TokenStream<ComponentValue>& tokens, PositionValue initial_value)
{
auto transaction = tokens.begin_transaction();
tokens.skip_whitespace();
if (!tokens.has_next_token())
return {};
auto parse_horizontal_preset = [&](auto ident) -> Optional<PositionValue::HorizontalPreset> {
if (ident.equals_ignoring_ascii_case("left"sv))
return PositionValue::HorizontalPreset::Left;
if (ident.equals_ignoring_ascii_case("center"sv))
return PositionValue::HorizontalPreset::Center;
if (ident.equals_ignoring_ascii_case("right"sv))
return PositionValue::HorizontalPreset::Right;
return {};
};
auto parse_vertical_preset = [&](auto ident) -> Optional<PositionValue::VerticalPreset> {
if (ident.equals_ignoring_ascii_case("top"sv))
return PositionValue::VerticalPreset::Top;
if (ident.equals_ignoring_ascii_case("center"sv))
return PositionValue::VerticalPreset::Center;
if (ident.equals_ignoring_ascii_case("bottom"sv))
return PositionValue::VerticalPreset::Bottom;
return {};
};
auto parse_horizontal_edge = [&](auto ident) -> Optional<PositionValue::HorizontalEdge> {
if (ident.equals_ignoring_ascii_case("left"sv))
return PositionValue::HorizontalEdge::Left;
if (ident.equals_ignoring_ascii_case("right"sv))
return PositionValue::HorizontalEdge::Right;
return {};
};
auto parse_vertical_edge = [&](auto ident) -> Optional<PositionValue::VerticalEdge> {
if (ident.equals_ignoring_ascii_case("top"sv))
return PositionValue::VerticalEdge::Top;
if (ident.equals_ignoring_ascii_case("bottom"sv))
return PositionValue::VerticalEdge::Bottom;
return {};
};
// <position> = [
// [ left | center | right ] || [ top | center | bottom ]
// |
// [ left | center | right | <length-percentage> ]
// [ top | center | bottom | <length-percentage> ]?
// |
// [ [ left | right ] <length-percentage> ] &&
// [ [ top | bottom ] <length-percentage> ]
// ]
// [ left | center | right ] || [ top | center | bottom ]
auto alternation_1 = [&]() -> Optional<PositionValue> {
auto transaction = tokens.begin_transaction();
PositionValue position = initial_value;
auto& first_token = tokens.next_token();
if (!first_token.is(Token::Type::Ident))
return {};
auto ident = first_token.token().ident();
// <horizontal-position> <vertical-position>?
auto horizontal_position = parse_horizontal_preset(ident);
if (horizontal_position.has_value()) {
position.horizontal_position = *horizontal_position;
auto transaction_optional_parse = tokens.begin_transaction();
tokens.skip_whitespace();
if (tokens.has_next_token()) {
auto& second_token = tokens.next_token();
if (second_token.is(Token::Type::Ident)) {
auto vertical_position = parse_vertical_preset(second_token.token().ident());
if (vertical_position.has_value()) {
transaction_optional_parse.commit();
position.vertical_position = *vertical_position;
}
}
}
} else {
// <vertical-position> <horizontal-position>?
auto vertical_position = parse_vertical_preset(ident);
if (!vertical_position.has_value())
return {};
position.vertical_position = *vertical_position;
auto transaction_optional_parse = tokens.begin_transaction();
tokens.skip_whitespace();
if (tokens.has_next_token()) {
auto& second_token = tokens.next_token();
if (second_token.is(Token::Type::Ident)) {
auto horizontal_position = parse_horizontal_preset(second_token.token().ident());
if (horizontal_position.has_value()) {
transaction_optional_parse.commit();
position.horizontal_position = *horizontal_position;
}
}
}
}
transaction.commit();
return position;
};
// [ left | center | right | <length-percentage> ]
// [ top | center | bottom | <length-percentage> ]?
auto alternation_2 = [&]() -> Optional<PositionValue> {
auto transaction = tokens.begin_transaction();
PositionValue position = initial_value;
auto& first_token = tokens.next_token();
if (first_token.is(Token::Type::Ident)) {
auto horizontal_position = parse_horizontal_preset(first_token.token().ident());
if (!horizontal_position.has_value())
return {};
position.horizontal_position = *horizontal_position;
} else {
auto dimension = parse_dimension(first_token);
if (!dimension.has_value() || !dimension->is_length_percentage())
return {};
position.horizontal_position = dimension->length_percentage();
}
auto transaction_optional_parse = tokens.begin_transaction();
tokens.skip_whitespace();
if (tokens.has_next_token()) {
auto& second_token = tokens.next_token();
if (second_token.is(Token::Type::Ident)) {
auto vertical_position = parse_vertical_preset(second_token.token().ident());
if (vertical_position.has_value()) {
transaction_optional_parse.commit();
position.vertical_position = *vertical_position;
}
} else {
auto dimension = parse_dimension(second_token);
if (dimension.has_value() && dimension->is_length_percentage()) {
transaction_optional_parse.commit();
position.vertical_position = dimension->length_percentage();
}
}
}
transaction.commit();
return position;
};
// [ [ left | right ] <length-percentage> ] &&
// [ [ top | bottom ] <length-percentage> ]
auto alternation_3 = [&]() -> Optional<PositionValue> {
auto transaction = tokens.begin_transaction();
PositionValue position {};
auto parse_horizontal = [&] {
// [ left | right ] <length-percentage> ]
auto transaction = tokens.begin_transaction();
tokens.skip_whitespace();
if (!tokens.has_next_token())
return false;
auto& first_token = tokens.next_token();
if (!first_token.is(Token::Type::Ident))
return false;
auto horizontal_egde = parse_horizontal_edge(first_token.token().ident());
if (!horizontal_egde.has_value())
return false;
position.x_relative_to = *horizontal_egde;
tokens.skip_whitespace();
if (!tokens.has_next_token())
return false;
auto& second_token = tokens.next_token();
auto dimension = parse_dimension(second_token);
if (!dimension.has_value() || !dimension->is_length_percentage())
return false;
position.horizontal_position = dimension->length_percentage();
transaction.commit();
return true;
};
auto parse_vertical = [&] {
// [ top | bottom ] <length-percentage> ]
auto transaction = tokens.begin_transaction();
tokens.skip_whitespace();
if (!tokens.has_next_token())
return false;
auto& first_token = tokens.next_token();
if (!first_token.is(Token::Type::Ident))
return false;
auto vertical_edge = parse_vertical_edge(first_token.token().ident());
if (!vertical_edge.has_value())
return false;
position.y_relative_to = *vertical_edge;
tokens.skip_whitespace();
if (!tokens.has_next_token())
return false;
auto& second_token = tokens.next_token();
auto dimension = parse_dimension(second_token);
if (!dimension.has_value() || !dimension->is_length_percentage())
return false;
position.vertical_position = dimension->length_percentage();
transaction.commit();
return true;
};
if ((parse_horizontal() && parse_vertical()) || (parse_vertical() && parse_horizontal())) {
transaction.commit();
return position;
}
return {};
};
// Note: The alternatives must be attempted in this order since `alternation_2' can match a prefix of `alternation_3'
auto position = alternation_3();
if (!position.has_value())
position = alternation_2();
if (!position.has_value())
position = alternation_1();
if (position.has_value())
transaction.commit();
return position;
}
CSSRule* Parser::convert_to_rule(NonnullRefPtr<Rule> rule)
{
if (rule->is_at_rule()) {

2
Userland/Libraries/LibWeb/CSS/Parser/Parser.h
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@ -24,7 +24,6 @@
#include <LibWeb/CSS/Parser/Rule.h>
#include <LibWeb/CSS/Parser/TokenStream.h>
#include <LibWeb/CSS/Parser/Tokenizer.h>
#include <LibWeb/CSS/Position.h>
#include <LibWeb/CSS/PropertyID.h>
#include <LibWeb/CSS/Ratio.h>
#include <LibWeb/CSS/Selector.h>
@ -183,7 +182,6 @@ private:
Optional<GridMinMax> parse_min_max(Vector<ComponentValue> const&);
Optional<GridRepeat> parse_repeat(Vector<ComponentValue> const&);
Optional<ExplicitGridTrack> parse_track_sizing_function(ComponentValue const&);
Optional<PositionValue> parse_position(TokenStream<ComponentValue>&, PositionValue initial_value = PositionValue::center());
Optional<AK::URL> parse_url_function(ComponentValue const&);
RefPtr<StyleValue> parse_url_value(ComponentValue const&);

102
Userland/Libraries/LibWeb/CSS/Position.cpp
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@ -1,102 +0,0 @@
/*
* Copyright (c) 2022-2023, MacDue <macdue@dueutil.tech>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#include "Position.h"
#include <LibGfx/Point.h>
#include <LibGfx/Rect.h>
namespace Web::CSS {
CSSPixelPoint PositionValue::resolved(Layout::Node const& node, CSSPixelRect const& rect) const
{
// Note: A preset + a none default x/y_relative_to is impossible in the syntax (and makes little sense)
CSSPixels x = horizontal_position.visit(
[&](HorizontalPreset preset) -> CSSPixels {
switch (preset) {
case HorizontalPreset::Left:
return 0;
case HorizontalPreset::Center:
return rect.width() / 2;
case HorizontalPreset::Right:
return rect.width();
default:
VERIFY_NOT_REACHED();
}
},
[&](LengthPercentage length_percentage) -> CSSPixels {
return length_percentage.to_px(node, rect.width());
});
CSSPixels y = vertical_position.visit(
[&](VerticalPreset preset) -> CSSPixels {
switch (preset) {
case VerticalPreset::Top:
return 0;
case VerticalPreset::Center:
return rect.height() / 2;
case VerticalPreset::Bottom:
return rect.height();
default:
VERIFY_NOT_REACHED();
}
},
[&](LengthPercentage length_percentage) -> CSSPixels {
return length_percentage.to_px(node, rect.height());
});
if (x_relative_to == HorizontalEdge::Right)
x = rect.width() - x;
if (y_relative_to == VerticalEdge::Bottom)
y = rect.height() - y;
return CSSPixelPoint { rect.x() + x, rect.y() + y };
}
void PositionValue::serialize(StringBuilder& builder) const
{
// Note: This means our serialization with simplify any with explicit edges that are just `top left`.
bool has_relative_edges = x_relative_to == HorizontalEdge::Right || y_relative_to == VerticalEdge::Bottom;
if (has_relative_edges)
builder.append(x_relative_to == HorizontalEdge::Left ? "left "sv : "right "sv);
horizontal_position.visit(
[&](HorizontalPreset preset) {
builder.append([&] {
switch (preset) {
case HorizontalPreset::Left:
return "left"sv;
case HorizontalPreset::Center:
return "center"sv;
case HorizontalPreset::Right:
return "right"sv;
default:
VERIFY_NOT_REACHED();
}
}());
},
[&](LengthPercentage length_percentage) {
builder.append(length_percentage.to_string());
});
builder.append(' ');
if (has_relative_edges)
builder.append(y_relative_to == VerticalEdge::Top ? "top "sv : "bottom "sv);
vertical_position.visit(
[&](VerticalPreset preset) {
builder.append([&] {
switch (preset) {
case VerticalPreset::Top:
return "top"sv;
case VerticalPreset::Center:
return "center"sv;
case VerticalPreset::Bottom:
return "bottom"sv;
default:
VERIFY_NOT_REACHED();
}
}());
},
[&](LengthPercentage length_percentage) {
builder.append(length_percentage.to_string());
});
}
}

53
Userland/Libraries/LibWeb/CSS/Position.h
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@ -1,53 +0,0 @@
/*
* Copyright (c) 2022-2023, MacDue <macdue@dueutil.tech>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#pragma once
#include <LibWeb/CSS/PercentageOr.h>
#include <LibWeb/PixelUnits.h>
namespace Web::CSS {
// FIXME: Named PositionValue to avoid conflicts with enums, but this represents a <position>
struct PositionValue {
enum class HorizontalPreset {
Left,
Center,
Right
};
enum class VerticalPreset {
Top,
Center,
Bottom
};
enum class HorizontalEdge {
Left,
Right
};
enum class VerticalEdge {
Top,
Bottom
};
static PositionValue center()
{
return PositionValue { HorizontalPreset::Center, VerticalPreset::Center };
}
Variant<HorizontalPreset, LengthPercentage> horizontal_position { HorizontalPreset::Left };
Variant<VerticalPreset, LengthPercentage> vertical_position { VerticalPreset::Top };
HorizontalEdge x_relative_to { HorizontalEdge::Left };
VerticalEdge y_relative_to { VerticalEdge::Top };
CSSPixelPoint resolved(Layout::Node const& node, CSSPixelRect const& rect) const;
void serialize(StringBuilder&) const;
bool operator==(PositionValue const&) const = default;
};
}