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LibWeb: Remove implicit conversion from float and double to CSSPixels

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In general it is not safe to convert any arbitrary floating-point value
to CSSPixels. CSSPixels has a resolution of 0.015625, which for small
values (e.g. scale factors between 0 and 1), can produce bad results
if converted to CSSPixels then scaled back up. In the worst case values
can underflow to zero and produce incorrect results.
This commit is contained in:
MacDue 2023-08-26 15:03:04 +01:00 • committed by Alexander Kalenik
parent 0f9c088302
commit 360c0eb509
Notes: sideshowbarker 2024-07-17 10:10:18 +09:00
43 changed files with 248 additions and 221 deletions
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6
Userland/Libraries/LibWeb/HTML/Parser/HTMLParser.cpp
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@ -3993,14 +3993,14 @@ static RefPtr<CSS::StyleValue> parse_current_dimension_value(float value, Utf8Vi
{
// 1. If position is past the end of input, then return value as a length.
if (position == input.end())
return CSS::LengthStyleValue::create(CSS::Length::make_px(value));
return CSS::LengthStyleValue::create(CSS::Length::make_px(CSSPixels(value)));
// 2. If the code point at position within input is U+0025 (%), then return value as a percentage.
if (*position == '%')
return CSS::PercentageStyleValue::create(CSS::Percentage(value));
// 3. Return value as a length.
return CSS::LengthStyleValue::create(CSS::Length::make_px(value));
return CSS::LengthStyleValue::create(CSS::Length::make_px(CSSPixels(value)));
}
// https://html.spec.whatwg.org/multipage/common-microsyntaxes.html#rules-for-parsing-dimension-values
@ -4065,7 +4065,7 @@ RefPtr<CSS::StyleValue> parse_dimension_value(StringView string)
// 4. If position is past the end of input, then return value as a length.
if (position == input.end())
return CSS::LengthStyleValue::create(CSS::Length::make_px(value));
return CSS::LengthStyleValue::create(CSS::Length::make_px(CSSPixels(value)));
// 5. If the code point at position within input is not an ASCII digit, then break.
if (!is_ascii_digit(*position))