mirrors/ladybird
0
0
Fork 0
mirror of https://github.com/LadybirdBrowser/ladybird.git synced 2025-07-15 21:41:58 +00:00
Code Issues Projects Releases Packages Wiki Activity Actions 10

LibWeb/HTML: Handle missing second component in datetime-local

Browse source 
We were previously not checking for EOF which meant we were not
handling seconds being missing in the time component.
This commit is contained in:
Shannon Booth 2025-03-19 01:53:26 +13:00 • committed by Tim Flynn
parent a457ebeec5
commit 894c51e8e7
Notes: github-actions[bot] 2025-03-18 19:06:05 +00:00
3 changed files with 46 additions and 37 deletions
Download patch file Download diff file Expand all files Collapse all files

73
Libraries/LibWeb/HTML/Dates.cpp
View file

@ -414,13 +414,16 @@ static Optional<HourMinuteSecond> parse_a_time_component(GenericLexer& input)
if (!maybe_hour.has_value())
return {};
auto hour = maybe_hour.value();
// 2. If hour is not a number in the range 0 ≤ hour ≤ 23, then fail.
if (hour < 0 || hour > 23)
return {};
// 3. If position is beyond the end of input or if the character at position is not a U+003A COLON character, then
// fail. Otherwise, move position forwards one character.
if (!input.consume_specific(':'))
return {};
// 4. Collect a sequence of code points that are ASCII digits from input given position. If the collected sequence
// is not exactly two characters long, then fail. Otherwise, interpret the resulting sequence as a base-ten integer.
// Let that number be the minute.
@ -431,44 +434,50 @@ static Optional<HourMinuteSecond> parse_a_time_component(GenericLexer& input)
if (!maybe_minute.has_value())
return {};
auto minute = maybe_minute.value();
// 5. If minute is not a number in the range 0 ≤ minute ≤ 59, then fail.
if (minute < 0 || hour > 59)
return {};
// 6. Let second be 0.
i32 second = 0;
// 7. If position is not beyond the end of input and the character at position is U+003A (:), then:
if (!input.consume_specific(':'))
return {};
// 7.1. Advance position to the next character in input.
// 7.2. If position is beyond the end of input, or at the last character in input, or if the next two characters in
// input starting at position are not both ASCII digits, then fail.
if (input.is_eof() || input.tell_remaining() == 1 || (!is_ascii_digit(input.peek()) && !is_ascii_digit(input.peek(1))))
return {};
// 7.3. Collect a sequence of code points that are either ASCII digits or U+002E FULL STOP characters from input
// given position.
auto second_string = input.consume_while([](auto ch) { return is_ascii_digit(ch) || ch == '.'; });
// If the collected sequence is three characters long, or if it is longer than three characters long and the third
// character is not a U+002E FULL STOP character, or if it has more than one U+002E FULL STOP character, then fail.
if (second_string.length() == 3)
return {};
if (second_string.length() > 3 && second_string[2] != '.')
return {};
if (second_string.find_all("."sv).size() > 1)
return {};
// Otherwise, interpret the resulting sequence as a base-ten number (possibly with a fractional part). Set second
// to that number.
// NB: The spec doesn't state requirements for what we must do with the fractional part of the second(s) string.
// The spec neither requires that we separately preserve it nor requires that we completely discard it. If we
// did have any reason at all to preserve it, we could parse the string into a float here. But there doesn't
// seem to be any point in doing that, because there’s nothing in the corresponding calling algorithm(s) in the
// spec that takes a milliseconds field and does anything with it anyway.
auto maybe_second = second_string.to_number<i32>();
if (!maybe_second.has_value())
return {};
second = maybe_second.value();
// 7.4. If second is not a number in the range 0 ≤ second < 60, then fail.
if (second < 0 || second > 60)
return {};
if (input.consume_specific(':')) {
// 1. Advance position to the next character in input.
// 2. If position is beyond the end of input, or at the last character in input, or if the next two characters in
// input starting at position are not both ASCII digits, then fail.
if (input.is_eof() || input.tell_remaining() == 1 || (!is_ascii_digit(input.peek()) && !is_ascii_digit(input.peek(1))))
return {};
// 3. Collect a sequence of code points that are either ASCII digits or U+002E FULL STOP characters from input
// given position.
auto second_string = input.consume_while([](auto ch) { return is_ascii_digit(ch) || ch == '.'; });
// If the collected sequence is three characters long, or if it is longer than three characters long and the third
// character is not a U+002E FULL STOP character, or if it has more than one U+002E FULL STOP character, then fail.
if (second_string.length() == 3)
return {};
if (second_string.length() > 3 && second_string[2] != '.')
return {};
if (second_string.find_all("."sv).size() > 1)
return {};
// Otherwise, interpret the resulting sequence as a base-ten number (possibly with a fractional part). Set second
// to that number.
// NB: The spec doesn't state requirements for what we must do with the fractional part of the second(s) string.
// The spec neither requires that we separately preserve it nor requires that we completely discard it. If we
// did have any reason at all to preserve it, we could parse the string into a float here. But there doesn't
// seem to be any point in doing that, because there’s nothing in the corresponding calling algorithm(s) in the
// spec that takes a milliseconds field and does anything with it anyway.
auto maybe_second = second_string.to_number<i32>();
if (!maybe_second.has_value())
return {};
second = maybe_second.value();
// 4. If second is not a number in the range 0 ≤ second < 60, then fail.
if (second < 0 || second > 60)
return {};
}
// 8. Return hour, minute, and second.
return HourMinuteSecond { hour, minute, second };
}