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LibWeb+WebContent: Forbid access to underlying type of CSSPixels

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Although DistinctNumeric, which is supposed to abstract the underlying
type, was used to represent CSSPixels, we have a whole bunch of places
in the layout code that assume CSSPixels::value() returns a
floating-point type. This assumption makes it difficult to replace the
underlying type in CSSPixels with a non-floating type.

To make it easier to transition CSSPixels to fixed-point math, one step
we can take is to prevent access to the underlying type using value()
and instead use explicit conversions with the to_float(), to_double(),
and to_int() methods.
This commit is contained in:
Aliaksandr Kalenik 2023-06-12 21:37:35 +03:00 • committed by Andreas Kling
parent 5a54c686a7
commit 147c3b3d97
43 changed files with 340 additions and 220 deletions
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26
Userland/Libraries/LibWeb/CSS/Length.cpp
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@ -49,7 +49,7 @@ Length Length::make_auto()
Length Length::make_px(CSSPixels value)
{
return Length(value.value(), Type::Px);
return Length(value.to_double(), Type::Px);
}
Length Length::percentage_of(Percentage const& percentage) const
@ -74,31 +74,31 @@ CSSPixels Length::font_relative_length_to_px(Length::FontMetrics const& font_met
{
switch (m_type) {
case Type::Em:
return m_value * font_metrics.font_size;
return m_value * font_metrics.font_size.to_double();
case Type::Rem:
return m_value * root_font_metrics.font_size;
return m_value * root_font_metrics.font_size.to_double();
case Type::Ex:
return m_value * font_metrics.x_height;
return m_value * font_metrics.x_height.to_double();
case Type::Rex:
return m_value * root_font_metrics.x_height;
return m_value * root_font_metrics.x_height.to_double();
case Type::Cap:
return m_value * font_metrics.cap_height;
return m_value * font_metrics.cap_height.to_double();
case Type::Rcap:
return m_value * root_font_metrics.cap_height;
return m_value * root_font_metrics.cap_height.to_double();
case Type::Ch:
return m_value * font_metrics.zero_advance;
return m_value * font_metrics.zero_advance.to_double();
case Type::Rch:
return m_value * root_font_metrics.zero_advance;
return m_value * root_font_metrics.zero_advance.to_double();
case Type::Ic:
// FIXME: Use the "advance measure of the “水” (CJK water ideograph, U+6C34) glyph"
return m_value * font_metrics.font_size;
return m_value * font_metrics.font_size.to_double();
case Type::Ric:
// FIXME: Use the "advance measure of the “水” (CJK water ideograph, U+6C34) glyph"
return m_value * root_font_metrics.font_size;
return m_value * root_font_metrics.font_size.to_double();
case Type::Lh:
return m_value * font_metrics.line_height;
return m_value * font_metrics.line_height.to_double();
case Type::Rlh:
return m_value * root_font_metrics.line_height;
return m_value * root_font_metrics.line_height.to_double();
default:
VERIFY_NOT_REACHED();
}