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LibWeb: Convert images to common AbstractImageStyleValue base

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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.
This commit is contained in:
MacDue 2022-07-31 01:11:59 +01:00 • committed by Andreas Kling
parent 264543b90a
commit 6a6475673f
13 changed files with 140 additions and 70 deletions
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43
Userland/Libraries/LibWeb/CSS/StyleValue.h
View file

@ -9,6 +9,7 @@
#pragma once
#include <AK/Function.h>
#include <AK/GenericShorthands.h>
#include <AK/NonnullOwnPtr.h>
#include <AK/NonnullOwnPtrVector.h>
#include <AK/NonnullRefPtrVector.h>
@ -38,6 +39,7 @@
#include <LibWeb/CSS/ValueID.h>
#include <LibWeb/Forward.h>
#include <LibWeb/Loader/ImageResource.h>
#include <LibWeb/Painting/GradientPainting.h>
namespace Web::CSS {
@ -153,6 +155,7 @@ public:
Type type() const { return m_type; }
bool is_abstract_image() const { return AK::first_is_one_of(type(), Type::Image, Type::LinearGradient); }
bool is_angle() const { return type() == Type::Angle; }
bool is_background() const { return type() == Type::Background; }
bool is_background_repeat() const { return type() == Type::BackgroundRepeat; }
@ -191,6 +194,7 @@ public:
bool is_builtin() const { return is_inherit() || is_initial() || is_unset(); }
AbstractImageStyleValue const& as_abstract_image() const;
AngleStyleValue const& as_angle() const;
BackgroundStyleValue const& as_background() const;
BackgroundRepeatStyleValue const& as_background_repeat() const;
@ -227,6 +231,7 @@ public:
UnsetStyleValue const& as_unset() const;
StyleValueList const& as_value_list() const;
AbstractImageStyleValue& as_abstract_image() { return const_cast<AbstractImageStyleValue&>(const_cast<StyleValue const&>(*this).as_abstract_image()); }
AngleStyleValue& as_angle() { return const_cast<AngleStyleValue&>(const_cast<StyleValue const&>(*this).as_angle()); }
BackgroundStyleValue& as_background() { return const_cast<BackgroundStyleValue&>(const_cast<StyleValue const&>(*this).as_background()); }
BackgroundRepeatStyleValue& as_background_repeat() { return const_cast<BackgroundRepeatStyleValue&>(const_cast<StyleValue const&>(*this).as_background_repeat()); }
@ -919,8 +924,22 @@ private:
CSS::ValueID m_id { CSS::ValueID::Invalid };
};
class AbstractImageStyleValue : public StyleValue {
public:
using StyleValue::StyleValue;
virtual Optional<int> natural_width() const { return {}; }
virtual Optional<int> natural_height() const { return {}; }
virtual void load_any_resources(DOM::Document&) {};
virtual void resolve_for_size(Layout::Node const&, Gfx::FloatSize const&) const {};
virtual bool is_paintable() const = 0;
virtual void paint(PaintContext& context, Gfx::IntRect const& dest_rect) const = 0;
};
class ImageStyleValue final
: public StyleValue
: public AbstractImageStyleValue
, public ImageResourceClient {
public:
static NonnullRefPtr<ImageStyleValue> create(AK::URL const& url) { return adopt_ref(*new ImageStyleValue(url)); }
@ -929,9 +948,16 @@ public:
virtual String to_string() const override;
virtual bool equals(StyleValue const& other) const override;
void load_bitmap(DOM::Document& document);
virtual void load_any_resources(DOM::Document&) override;
Gfx::Bitmap const* bitmap() const { return m_bitmap; }
Optional<int> natural_width() const override;
Optional<int> natural_height() const override;
bool is_paintable() const override { return !m_bitmap.is_null(); }
void paint(PaintContext& context, Gfx::IntRect const& dest_rect) const override;
private:
ImageStyleValue(AK::URL const&);
@ -943,7 +969,7 @@ private:
RefPtr<Gfx::Bitmap> m_bitmap;
};
class LinearGradientStyleValue final : public StyleValue {
class LinearGradientStyleValue final : public AbstractImageStyleValue {
public:
using GradientDirection = Variant<Angle, SideOrCorner>;
@ -967,11 +993,16 @@ public:
return m_color_stop_list;
}
float angle_degrees(Gfx::FloatRect const& gradient_rect) const;
float angle_degrees(Gfx::FloatSize const& gradient_rect) const;
void resolve_for_size(Layout::Node const&, Gfx::FloatSize const&) const override;
bool is_paintable() const override { return true; }
void paint(PaintContext& context, Gfx::IntRect const& dest_rect) const override;
private:
LinearGradientStyleValue(GradientDirection direction, Vector<ColorStopListElement> color_stop_list, GradientType type)
: StyleValue(Type::LinearGradient)
: AbstractImageStyleValue(Type::LinearGradient)
, m_direction(direction)
, m_color_stop_list(move(color_stop_list))
, m_gradient_type(type)
@ -981,6 +1012,8 @@ private:
GradientDirection m_direction;
Vector<ColorStopListElement> m_color_stop_list;
GradientType m_gradient_type;
mutable Optional<Painting::LinearGradientData> m_resolved_data;
};
class InheritStyleValue final : public StyleValue {