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LibWeb: Parse the content property

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For now, we only understand `none`, `normal`, `<image>` and `<string>`.
The various other functions and identifiers can be added later.

We can *almost* use a StyleValueList for this, except it's divided into
two parts - the content, and the optional "alt text". So, I've added a
new StyleValue for it.
This commit is contained in:
Sam Atkins 2022-02-23 19:56:25 +00:00 • committed by Andreas Kling
parent a9ad72cc0f
commit adaab23149
6 changed files with 120 additions and 0 deletions
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29
Userland/Libraries/LibWeb/CSS/StyleValue.h
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@ -297,6 +297,7 @@ public:
Calculated,
Color,
CombinedBorderRadius,
Content,
Flex,
FlexFlow,
Font,
@ -333,6 +334,7 @@ public:
bool is_box_shadow() const { return type() == Type::BoxShadow; }
bool is_calculated() const { return type() == Type::Calculated; }
bool is_color() const { return type() == Type::Color; }
bool is_content() const { return type() == Type::Content; }
bool is_flex() const { return type() == Type::Flex; }
bool is_flex_flow() const { return type() == Type::FlexFlow; }
bool is_font() const { return type() == Type::Font; }
@ -367,6 +369,7 @@ public:
BoxShadowStyleValue const& as_box_shadow() const;
CalculatedStyleValue const& as_calculated() const;
ColorStyleValue const& as_color() const;
ContentStyleValue const& as_content() const;
FlexFlowStyleValue const& as_flex_flow() const;
FlexStyleValue const& as_flex() const;
FontStyleValue const& as_font() const;
@ -399,6 +402,7 @@ public:
BoxShadowStyleValue& as_box_shadow() { return const_cast<BoxShadowStyleValue&>(const_cast<StyleValue const&>(*this).as_box_shadow()); }
CalculatedStyleValue& as_calculated() { return const_cast<CalculatedStyleValue&>(const_cast<StyleValue const&>(*this).as_calculated()); }
ColorStyleValue& as_color() { return const_cast<ColorStyleValue&>(const_cast<StyleValue const&>(*this).as_color()); }
ContentStyleValue& as_content() { return const_cast<ContentStyleValue&>(const_cast<StyleValue const&>(*this).as_content()); }
FlexFlowStyleValue& as_flex_flow() { return const_cast<FlexFlowStyleValue&>(const_cast<StyleValue const&>(*this).as_flex_flow()); }
FlexStyleValue& as_flex() { return const_cast<FlexStyleValue&>(const_cast<StyleValue const&>(*this).as_flex()); }
FontStyleValue& as_font() { return const_cast<FontStyleValue&>(const_cast<StyleValue const&>(*this).as_font()); }
@ -969,6 +973,31 @@ private:
NonnullRefPtr<BorderRadiusStyleValue> m_bottom_left;
};
class ContentStyleValue final : public StyleValue {
public:
static NonnullRefPtr<ContentStyleValue> create(NonnullRefPtr<StyleValueList> content, RefPtr<StyleValueList> alt_text)
{
return adopt_ref(*new ContentStyleValue(move(content), move(alt_text)));
}
StyleValueList const& content() const { return *m_content; }
bool has_alt_text() const { return !m_alt_text.is_null(); }
StyleValueList const* alt_text() const { return m_alt_text; }
virtual String to_string() const override;
private:
ContentStyleValue(NonnullRefPtr<StyleValueList> content, RefPtr<StyleValueList> alt_text)
: StyleValue(Type::Content)
, m_content(move(content))
, m_alt_text(move(alt_text))
{
}
NonnullRefPtr<StyleValueList> m_content;
RefPtr<StyleValueList> m_alt_text;
};
class FlexStyleValue final : public StyleValue {
public:
static NonnullRefPtr<FlexStyleValue> create(