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LibWeb: Convert images to common AbstractImageStyleValue base
This commit moves both the ImageStyleValue and LinearGradientStyleValue to a common base class of AbstractImageStyleValue. This abstracts getting the natural_width/height, loading/resolving, and painting the image. Now for 'free' you get: - Linear gradients working with the various background sizing/repeat properties. - Linear gradients working as list-markers :^) -- best feature ever! P.s. This commit is a little large as it's tricky to make this change incrementally without breaking things.
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13 changed files with 140 additions and 70 deletions
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@ -9,6 +9,7 @@
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#pragma once
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#include <AK/Function.h>
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#include <AK/GenericShorthands.h>
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#include <AK/NonnullOwnPtr.h>
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#include <AK/NonnullOwnPtrVector.h>
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#include <AK/NonnullRefPtrVector.h>
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@ -38,6 +39,7 @@
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#include <LibWeb/CSS/ValueID.h>
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#include <LibWeb/Forward.h>
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#include <LibWeb/Loader/ImageResource.h>
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#include <LibWeb/Painting/GradientPainting.h>
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namespace Web::CSS {
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@ -153,6 +155,7 @@ public:
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Type type() const { return m_type; }
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bool is_abstract_image() const { return AK::first_is_one_of(type(), Type::Image, Type::LinearGradient); }
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bool is_angle() const { return type() == Type::Angle; }
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bool is_background() const { return type() == Type::Background; }
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bool is_background_repeat() const { return type() == Type::BackgroundRepeat; }
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@ -191,6 +194,7 @@ public:
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bool is_builtin() const { return is_inherit() || is_initial() || is_unset(); }
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AbstractImageStyleValue const& as_abstract_image() const;
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AngleStyleValue const& as_angle() const;
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BackgroundStyleValue const& as_background() const;
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BackgroundRepeatStyleValue const& as_background_repeat() const;
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@ -227,6 +231,7 @@ public:
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UnsetStyleValue const& as_unset() const;
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StyleValueList const& as_value_list() const;
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AbstractImageStyleValue& as_abstract_image() { return const_cast<AbstractImageStyleValue&>(const_cast<StyleValue const&>(*this).as_abstract_image()); }
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AngleStyleValue& as_angle() { return const_cast<AngleStyleValue&>(const_cast<StyleValue const&>(*this).as_angle()); }
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BackgroundStyleValue& as_background() { return const_cast<BackgroundStyleValue&>(const_cast<StyleValue const&>(*this).as_background()); }
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BackgroundRepeatStyleValue& as_background_repeat() { return const_cast<BackgroundRepeatStyleValue&>(const_cast<StyleValue const&>(*this).as_background_repeat()); }
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@ -919,8 +924,22 @@ private:
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CSS::ValueID m_id { CSS::ValueID::Invalid };
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};
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class AbstractImageStyleValue : public StyleValue {
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public:
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using StyleValue::StyleValue;
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virtual Optional<int> natural_width() const { return {}; }
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virtual Optional<int> natural_height() const { return {}; }
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virtual void load_any_resources(DOM::Document&) {};
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virtual void resolve_for_size(Layout::Node const&, Gfx::FloatSize const&) const {};
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virtual bool is_paintable() const = 0;
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virtual void paint(PaintContext& context, Gfx::IntRect const& dest_rect) const = 0;
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};
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class ImageStyleValue final
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: public StyleValue
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: public AbstractImageStyleValue
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, public ImageResourceClient {
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public:
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static NonnullRefPtr<ImageStyleValue> create(AK::URL const& url) { return adopt_ref(*new ImageStyleValue(url)); }
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@ -929,9 +948,16 @@ public:
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virtual String to_string() const override;
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virtual bool equals(StyleValue const& other) const override;
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void load_bitmap(DOM::Document& document);
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virtual void load_any_resources(DOM::Document&) override;
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Gfx::Bitmap const* bitmap() const { return m_bitmap; }
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Optional<int> natural_width() const override;
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Optional<int> natural_height() const override;
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bool is_paintable() const override { return !m_bitmap.is_null(); }
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void paint(PaintContext& context, Gfx::IntRect const& dest_rect) const override;
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private:
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ImageStyleValue(AK::URL const&);
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@ -943,7 +969,7 @@ private:
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RefPtr<Gfx::Bitmap> m_bitmap;
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};
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class LinearGradientStyleValue final : public StyleValue {
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class LinearGradientStyleValue final : public AbstractImageStyleValue {
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public:
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using GradientDirection = Variant<Angle, SideOrCorner>;
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@ -967,11 +993,16 @@ public:
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return m_color_stop_list;
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}
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float angle_degrees(Gfx::FloatRect const& gradient_rect) const;
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float angle_degrees(Gfx::FloatSize const& gradient_rect) const;
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void resolve_for_size(Layout::Node const&, Gfx::FloatSize const&) const override;
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bool is_paintable() const override { return true; }
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void paint(PaintContext& context, Gfx::IntRect const& dest_rect) const override;
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private:
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LinearGradientStyleValue(GradientDirection direction, Vector<ColorStopListElement> color_stop_list, GradientType type)
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: StyleValue(Type::LinearGradient)
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: AbstractImageStyleValue(Type::LinearGradient)
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, m_direction(direction)
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, m_color_stop_list(move(color_stop_list))
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, m_gradient_type(type)
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@ -981,6 +1012,8 @@ private:
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GradientDirection m_direction;
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Vector<ColorStopListElement> m_color_stop_list;
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GradientType m_gradient_type;
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mutable Optional<Painting::LinearGradientData> m_resolved_data;
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};
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class InheritStyleValue final : public StyleValue {
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