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LibWeb: Add pc CSS unit

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This commit is contained in:
Luke 2020-10-05 16:18:07 +01:00 • committed by Andreas Kling
parent aa71dae03c
commit 043b31ad9a
3 changed files with 16 additions and 5 deletions
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16
Libraries/LibWeb/CSS/Length.h
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@ -43,6 +43,7 @@ public:
Q,
Px,
Pt,
Pc,
Ex,
Em,
Rem,
@ -100,6 +101,7 @@ public:
|| m_type == Type::Mm
|| m_type == Type::Px
|| m_type == Type::Pt
|| m_type == Type::Pc
|| m_type == Type::Q;
}
@ -119,21 +121,25 @@ public:
{
if (is_relative())
return relative_length_to_px(layout_node);
constexpr float inch_pixels = 96.0f;
constexpr float centimeter_pixels = (inch_pixels / 2.54f);
switch (m_type) {
case Type::Auto:
return 0;
case Type::Cm:
return m_value * (96.0f / 2.54f); // 1cm = 96px/2.54
return m_value * centimeter_pixels; // 1cm = 96px/2.54
case Type::In:
return m_value * 96.0f; // 1in = 2.54 cm = 96px
return m_value * inch_pixels; // 1in = 2.54 cm = 96px
case Type::Px:
return m_value; // 1px = 1/96th of 1in
case Type::Pt:
return m_value * 1.33333333f; // 1pt = 1/72th of 1in
return m_value * ((1.0f / 72.0f) * inch_pixels); // 1pt = 1/72th of 1in
case Type::Pc:
return m_value * ((1.0f / 6.0f) * inch_pixels); // 1pc = 1/6th of 1in
case Type::Mm:
return m_value * (0.1f * (96.0f / 2.54f)); // 1mm = 1/10th of 1cm
return m_value * ((1.0f / 10.0f) * centimeter_pixels); // 1mm = 1/10th of 1cm
case Type::Q:
return m_value * (0.025f * (96.0f / 2.54f)); // 1Q = 1/40th of 1cm
return m_value * ((1.0f / 40.0f) * centimeter_pixels); // 1Q = 1/40th of 1cm
case Type::Undefined:
case Type::Percentage:
default: