beenull/ladybird
1
0
Fork 0
mirror of https://github.com/LadybirdBrowser/ladybird.git synced 2024-11-23 08:00:20 +00:00
Code Issues Projects Releases Packages Wiki Activity Actions 6

LibWeb: Remove old ANPlusB parsing code

Browse source 
This was left over from the old CSS parser, so we no longer need it. :^)
This commit is contained in:
Sam Atkins 2021-10-14 15:42:59 +01:00 committed by Linus Groh
parent 4d555e8b95
commit 5c1427f3e0
Notes: sideshowbarker 2024-07-18 02:18:31 +09:00 
Author: https://github.com/AtkinsSJ
Commit: https://github.com/SerenityOS/serenity/commit/5c1427f3e04
Pull-request: https://github.com/SerenityOS/serenity/pull/10484
Reviewed-by: https://github.com/linusg ✅
2 changed files with 0 additions and 75 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

74
Userland/Libraries/LibWeb/CSS/Selector.cpp
View file

@ -5,9 +5,6 @@
*/
#include "Selector.h"
#include <AK/GenericLexer.h>
#include <AK/StringUtils.h>
#include <ctype.h>
namespace Web::CSS {
@ -47,75 +44,4 @@ u32 Selector::specificity() const
return ids * 0x10000 + classes * 0x100 + tag_names;
}
Selector::SimpleSelector::ANPlusBPattern Selector::SimpleSelector::ANPlusBPattern::parse(StringView const& args)
{
// FIXME: Remove this when the DeprecatedCSSParser is gone.
// The new Parser::parse_nth_child_pattern() does the same as this, using Tokens.
CSS::Selector::SimpleSelector::ANPlusBPattern pattern;
if (args.equals_ignoring_case("odd")) {
pattern.step_size = 2;
pattern.offset = 1;
} else if (args.equals_ignoring_case("even")) {
pattern.step_size = 2;
} else {
auto const consume_int = [](GenericLexer& lexer) -> Optional<int> {
return AK::StringUtils::convert_to_int(lexer.consume_while([](char c) -> bool {
return isdigit(c) || c == '+' || c == '-';
}));
};
// Try to match any of following patterns:
// 1. An+B
// 2. An
// 3. B
// ...where "A" is "step_size", "B" is "offset" and rest are literals.
// "A" can be omitted, in that case "A" = 1.
// "A" may have "+" or "-" sign, "B" always must be predated by sign for pattern (1).
int step_size_or_offset = 0;
GenericLexer lexer { args };
// "When a=1, or a=-1, the 1 may be omitted from the rule."
if (lexer.consume_specific("n") || lexer.consume_specific("+n")) {
step_size_or_offset = +1;
lexer.retreat();
} else if (lexer.consume_specific("-n")) {
step_size_or_offset = -1;
lexer.retreat();
} else {
auto const value = consume_int(lexer);
if (!value.has_value())
return {};
step_size_or_offset = value.value();
}
if (lexer.consume_specific("n")) {
lexer.ignore_while(isspace);
if (lexer.next_is('+') || lexer.next_is('-')) {
auto const sign = lexer.next_is('+') ? 1 : -1;
lexer.ignore();
lexer.ignore_while(isspace);
// "An+B" pattern
auto const offset = consume_int(lexer);
if (!offset.has_value())
return {};
pattern.step_size = step_size_or_offset;
pattern.offset = sign * offset.value();
} else {
// "An" pattern
pattern.step_size = step_size_or_offset;
}
} else {
// "B" pattern
pattern.offset = step_size_or_offset;
}
if (lexer.remaining().length() > 0)
return {};
}
return pattern;
}
}

1
Userland/Libraries/LibWeb/CSS/Selector.h
View file

@ -37,7 +37,6 @@ public:
int step_size { 0 }; // "A"
int offset = { 0 }; // "B"
static ANPlusBPattern parse(StringView const& args);
String to_string() const
{
return String::formatted("{}n{:+}", step_size, offset);