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LibWeb: Add an "undefined" state to Length
A default-constructed Length now gives you an undefined length value, which can be used to signify the absence of a value.
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parent
f742b245b7
commit
90edaabc4b
2 changed files with 7 additions and 1 deletions
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@ -53,6 +53,8 @@ const char* Length::unit_name() const
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return "rem";
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case Type::Auto:
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return "auto";
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case Type::Undefined:
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return "undefined";
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}
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ASSERT_NOT_REACHED();
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}
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@ -34,12 +34,14 @@ namespace Web {
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class Length {
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public:
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enum class Type {
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Undefined,
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Auto,
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Px,
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Em,
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Rem,
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};
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Length() { }
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Length(int value, Type type)
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: m_type(type)
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, m_value(value)
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@ -54,6 +56,7 @@ public:
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static Length make_auto() { return Length(0, Type::Auto); }
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static Length make_px(float value) { return Length(value, Type::Px); }
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bool is_undefined() const { return m_type == Type::Undefined; }
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bool is_auto() const { return m_type == Type::Auto; }
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bool is_absolute() const { return m_type == Type::Px; }
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bool is_relative() const { return m_type == Type::Em || m_type == Type::Rem; }
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@ -68,6 +71,7 @@ public:
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return 0;
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case Type::Px:
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return m_value;
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case Type::Undefined:
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default:
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ASSERT_NOT_REACHED();
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}
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@ -85,7 +89,7 @@ private:
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const char* unit_name() const;
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Type m_type { Type::Auto };
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Type m_type { Type::Undefined };
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float m_value { 0 };
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};
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