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ladybird/Libraries/LibHTML/CSS/StyleProperties.h

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LibHTML: Get rid of the style tree We now create a layout tree directly from the DOM tree. This way we don't actually lose text nodes ^)
2019-09-21 15:32:17 +03:00
#pragma once
#include <AK/HashMap.h>
#include <AK/NonnullRefPtr.h>
LibHTML: Move font loading from LayoutText to StyleProperties Since LayoutText inherits all of its style information from its parent Element anyway, it makes more sense to load the font at a higher level. And since the font depends only on the style and nothing else, this patch moves font loading (and caching) into StyleProperties. This could be made a lot smarter to avoid loading the same font many times, etc.
2019-10-06 11:23:58 +02:00
#include <LibDraw/Font.h>
LibHTML: Get rid of the style tree We now create a layout tree directly from the DOM tree. This way we don't actually lose text nodes ^)
2019-09-21 15:32:17 +03:00
#include <LibHTML/CSS/StyleValue.h>
LibHTML: Respect the CSS "color" property for text Also remove the color values from the ComputedStyle object and get them via StyleProperties instead. At the moment, we only handle colors that Color::from_string() parses.
2019-09-28 22:18:19 +02:00
class Color;
LibHTML: LayoutText should always use parent's style properties This patch makes StyleProperties heap-allocated and ref-counted so that a LayoutNode can be without one. The ref-counting also allows anonymous blocks to share style with their parent block. LayoutText never needs a StyleProperties, since text always inherits style from its parent element. This is handled by style_properties().
2019-10-04 12:12:39 +02:00
class StyleProperties : public RefCounted<StyleProperties> {
LibHTML: Get rid of the style tree We now create a layout tree directly from the DOM tree. This way we don't actually lose text nodes ^)
2019-09-21 15:32:17 +03:00
public:
LibHTML: LayoutText should always use parent's style properties This patch makes StyleProperties heap-allocated and ref-counted so that a LayoutNode can be without one. The ref-counting also allows anonymous blocks to share style with their parent block. LayoutText never needs a StyleProperties, since text always inherits style from its parent element. This is handled by style_properties().
2019-10-04 12:12:39 +02:00
static NonnullRefPtr<StyleProperties> create() { return adopt(*new StyleProperties); }
LibHTML: Get rid of the style tree We now create a layout tree directly from the DOM tree. This way we don't actually lose text nodes ^)
2019-09-21 15:32:17 +03:00
template<typename Callback>
inline void for_each_property(Callback callback) const
{
for (auto& it : m_property_values)
LibHTML: Use an enum for CSS property ID's Instead of using string everywhere, have the CSS parser produce enum values, since they are a lot nicer to work with. In the future we should generate most of this code based on a list of supported CSS properties.
2019-10-08 15:34:19 +02:00
callback((CSS::PropertyID)it.key, *it.value);
LibHTML: Get rid of the style tree We now create a layout tree directly from the DOM tree. This way we don't actually lose text nodes ^)
2019-09-21 15:32:17 +03:00
}
LibHTML: Use an enum for CSS property ID's Instead of using string everywhere, have the CSS parser produce enum values, since they are a lot nicer to work with. In the future we should generate most of this code based on a list of supported CSS properties.
2019-10-08 15:34:19 +02:00
void set_property(CSS::PropertyID, NonnullRefPtr<StyleValue> value);
Optional<NonnullRefPtr<StyleValue>> property(CSS::PropertyID) const;
LibHTML: Get rid of the style tree We now create a layout tree directly from the DOM tree. This way we don't actually lose text nodes ^)
2019-09-21 15:32:17 +03:00
LibHTML: Use an enum for CSS property ID's Instead of using string everywhere, have the CSS parser produce enum values, since they are a lot nicer to work with. In the future we should generate most of this code based on a list of supported CSS properties.
2019-10-08 15:34:19 +02:00
Length length_or_fallback(CSS::PropertyID, const Length& fallback) const;
String string_or_fallback(CSS::PropertyID, const StringView& fallback) const;
Color color_or_fallback(CSS::PropertyID, const Document&, Color fallback) const;
LibHTML: Get rid of the style tree We now create a layout tree directly from the DOM tree. This way we don't actually lose text nodes ^)
2019-09-21 15:32:17 +03:00
LibHTML: Move font loading from LayoutText to StyleProperties Since LayoutText inherits all of its style information from its parent Element anyway, it makes more sense to load the font at a higher level. And since the font depends only on the style and nothing else, this patch moves font loading (and caching) into StyleProperties. This could be made a lot smarter to avoid loading the same font many times, etc.
2019-10-06 11:23:58 +02:00
const Font& font() const
{
if (!m_font)
load_font();
return *m_font;
}
LibHTML: Add StyleProperties::line_height() We currently hard-code the line height to 140% of the font glyph height and this patch doesn't fix the hard-coding, but at least moves it out of LayoutText and into StyleProperties where it can be re-used until the day we go and do a proper implementation of CSS line-height. :^)
2019-10-12 13:42:58 +02:00
int line_height() const;
LibHTML: Implement basic partial style invalidation 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. :^)
2019-10-14 18:32:02 +02:00
bool operator==(const StyleProperties&) const;
bool operator!=(const StyleProperties& other) const { return !(*this == other); }
LibHTML: Get rid of the style tree We now create a layout tree directly from the DOM tree. This way we don't actually lose text nodes ^)
2019-09-21 15:32:17 +03:00
private:
LibHTML: Use an enum for CSS property ID's Instead of using string everywhere, have the CSS parser produce enum values, since they are a lot nicer to work with. In the future we should generate most of this code based on a list of supported CSS properties.
2019-10-08 15:34:19 +02:00
HashMap<unsigned, NonnullRefPtr<StyleValue>> m_property_values;
LibHTML: Move font loading from LayoutText to StyleProperties Since LayoutText inherits all of its style information from its parent Element anyway, it makes more sense to load the font at a higher level. And since the font depends only on the style and nothing else, this patch moves font loading (and caching) into StyleProperties. This could be made a lot smarter to avoid loading the same font many times, etc.
2019-10-06 11:23:58 +02:00
void load_font() const;
mutable RefPtr<Font> m_font;
LibHTML: Get rid of the style tree We now create a layout tree directly from the DOM tree. This way we don't actually lose text nodes ^)
2019-09-21 15:32:17 +03:00
};
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