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LibWeb: Move set_scroll_offset() from Layout::Box to PaintableBox

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Nodes in layout tree should not be aware of scroll state.
This commit is contained in:
Aliaksandr Kalenik 2023-08-06 21:10:15 +02:00 committed by Andreas Kling
parent 5b7926fa53
commit fee5b4deb6
Notes: sideshowbarker 2024-07-16 21:30:46 +09:00 
Author: https://github.com/kalenikaliaksandr
Commit: https://github.com/SerenityOS/serenity/commit/fee5b4deb6
Pull-request: https://github.com/SerenityOS/serenity/pull/20395
Reviewed-by: https://github.com/MacDue
5 changed files with 24 additions and 23 deletions
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4
Userland/Libraries/LibWeb/DOM/Element.cpp
View file

@ -1054,7 +1054,7 @@ void Element::set_scroll_left(double x)
// FIXME: Implement this in terms of calling "scroll the element".
auto scroll_offset = paintable_box()->scroll_offset();
scroll_offset.set_x(static_cast<float>(x));
box->set_scroll_offset(scroll_offset);
const_cast<Painting::PaintableBox*>(paintable_box())->set_scroll_offset(scroll_offset);
}
void Element::set_scroll_top(double y)
@ -1122,7 +1122,7 @@ void Element::set_scroll_top(double y)
// FIXME: Implement this in terms of calling "scroll the element".
auto scroll_offset = paintable_box()->scroll_offset();
scroll_offset.set_y(static_cast<float>(y));
box->set_scroll_offset(scroll_offset);
const_cast<Painting::PaintableBox*>(paintable_box())->set_scroll_offset(scroll_offset);
}
// https://drafts.csswg.org/cssom-view/#dom-element-scrollwidth

19
Userland/Libraries/LibWeb/Layout/Box.cpp
View file

@ -61,25 +61,6 @@ bool Box::is_scrollable() const
return computed_values().overflow_y() == CSS::Overflow::Scroll;
}
void Box::set_scroll_offset(CSSPixelPoint offset)
{
// FIXME: If there is horizontal and vertical scroll ignore only part of the new offset
if (offset.y() < 0 || paintable_box()->scroll_offset() == offset)
return;
if (is_generated_for_before_pseudo_element()) {
pseudo_element_generator()->set_scroll_offset(DOM::Element::ScrollOffsetFor::PseudoBefore, offset);
} else if (is_generated_for_after_pseudo_element()) {
pseudo_element_generator()->set_scroll_offset(DOM::Element::ScrollOffsetFor::PseudoAfter, offset);
} else if (is<DOM::Element>(*dom_node())) {
static_cast<DOM::Element*>(dom_node())->set_scroll_offset(DOM::Element::ScrollOffsetFor::Self, offset);
} else {
return;
}
set_needs_display();
}
void Box::set_needs_display()
{
if (paintable_box())

1
Userland/Libraries/LibWeb/Layout/Box.h
View file

@ -54,7 +54,6 @@ public:
bool is_scroll_container() const;
bool is_scrollable() const;
void set_scroll_offset(CSSPixelPoint);
protected:
Box(DOM::Document&, DOM::Node*, NonnullRefPtr<CSS::StyleProperties>);

22
Userland/Libraries/LibWeb/Painting/PaintableBox.cpp
View file

@ -71,6 +71,26 @@ CSSPixelPoint PaintableBox::scroll_offset() const
return static_cast<DOM::Element const*>(dom_node())->scroll_offset(DOM::Element::ScrollOffsetFor::Self);
}
void PaintableBox::set_scroll_offset(CSSPixelPoint offset)
{
// FIXME: If there is horizontal and vertical scroll ignore only part of the new offset
if (offset.y() < 0 || scroll_offset() == offset)
return;
auto& node = layout_node();
if (node.is_generated_for_before_pseudo_element()) {
node.pseudo_element_generator()->set_scroll_offset(DOM::Element::ScrollOffsetFor::PseudoBefore, offset);
} else if (node.is_generated_for_after_pseudo_element()) {
node.pseudo_element_generator()->set_scroll_offset(DOM::Element::ScrollOffsetFor::PseudoAfter, offset);
} else if (is<DOM::Element>(*dom_node())) {
static_cast<DOM::Element*>(dom_node())->set_scroll_offset(DOM::Element::ScrollOffsetFor::Self, offset);
} else {
return;
}
node.set_needs_display();
}
void PaintableBox::scroll_by(int delta_x, int delta_y)
{
auto scrollable_overflow_rect = this->scrollable_overflow_rect();
@ -81,7 +101,7 @@ void PaintableBox::scroll_by(int delta_x, int delta_y)
auto current_offset = scroll_offset();
auto new_offset_x = clamp(current_offset.x() + delta_x, 0, max_x_offset);
auto new_offset_y = clamp(current_offset.y() + delta_y, 0, max_y_offset);
layout_box().set_scroll_offset({ new_offset_x, new_offset_y });
set_scroll_offset({ new_offset_x, new_offset_y });
}
void PaintableBox::set_offset(CSSPixelPoint offset)

1
Userland/Libraries/LibWeb/Painting/PaintableBox.h
View file

@ -39,6 +39,7 @@ public:
CSSPixelPoint effective_offset() const;
CSSPixelPoint scroll_offset() const;
void set_scroll_offset(CSSPixelPoint);
void scroll_by(int delta_x, int delta_y);
void set_offset(CSSPixelPoint);