735f02900b
This patch makes it possible to call Node::invalidate_style() and have that node and all of its ancestors recompute their style. We then figure out if the new style is visually different from the old style, and if so do a paint invalidation with set_needs_display(). Note that the "are they visually different" code is very incomplete! Use this to make hover effects a lot more efficient. They no longer cause a full relayout+repaint, but only a style invalidation. Style invalidations are still quite heavy though, and there's a lot of room for improvement there. :^)
46 lines
1.3 KiB
C++
46 lines
1.3 KiB
C++
#pragma once
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#include <AK/HashMap.h>
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#include <AK/NonnullRefPtr.h>
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#include <LibDraw/Font.h>
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#include <LibHTML/CSS/StyleValue.h>
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class Color;
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class StyleProperties : public RefCounted<StyleProperties> {
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public:
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static NonnullRefPtr<StyleProperties> create() { return adopt(*new StyleProperties); }
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template<typename Callback>
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inline void for_each_property(Callback callback) const
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{
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for (auto& it : m_property_values)
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callback((CSS::PropertyID)it.key, *it.value);
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}
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void set_property(CSS::PropertyID, NonnullRefPtr<StyleValue> value);
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Optional<NonnullRefPtr<StyleValue>> property(CSS::PropertyID) const;
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Length length_or_fallback(CSS::PropertyID, const Length& fallback) const;
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String string_or_fallback(CSS::PropertyID, const StringView& fallback) const;
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Color color_or_fallback(CSS::PropertyID, const Document&, Color fallback) const;
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const Font& font() const
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{
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if (!m_font)
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load_font();
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return *m_font;
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}
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int line_height() const;
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bool operator==(const StyleProperties&) const;
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bool operator!=(const StyleProperties& other) const { return !(*this == other); }
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private:
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HashMap<unsigned, NonnullRefPtr<StyleValue>> m_property_values;
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void load_font() const;
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mutable RefPtr<Font> m_font;
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};
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