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layout: Implement overflow scroll support for different axes (#35414)

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* layout: Add AxesScrollSensitivity to enable control of scroll in axis

Signed-off-by: Euclid Ye <yezhizhenjiakang@gmail.com>

* layout_2013: Be compatible with AxesScrollSensitivity

Signed-off-by: Euclid Ye <yezhizhenjiakang@gmail.com>

* layout: update struct AxesScrollSensitivity to euclid::Vector2D

Signed-off-by: Euclid Ye <yezhizhenjiakang@gmail.com>

* display_list: implement From<Overflow> for ScrollSensitivity

Signed-off-by: Euclid Ye <yezhizhenjiakang@gmail.com>

* layout: simplify and reuse scroll related logic

Signed-off-by: Euclid Ye <yezhizhenjiakang@gmail.com>

* layout_2013: simplify and reuse scroll related logic

Signed-off-by: Euclid Ye <yezhizhenjiakang@gmail.com>

* layout, layout_2013: revert AxesScrollSensitivity to pair struct

Signed-off-by: Euclid Ye <yezhizhenjiakang@gmail.com>

* layout: Reimport ComputedOverflow as #35103 depends on it

Signed-off-by: Euclid Ye <yezhizhenjiakang@gmail.com>

* layout: Add AxesOverflow to replace PhysicalVec

Signed-off-by: Euclid Ye <yezhizhenjiakang@gmail.com>

* layout: implement scroll of viewport for different axes

Signed-off-by: Euclid Ye <yezhizhenjiakang@gmail.com>

* layout: explicitly handle overflow match

Signed-off-by: Euclid Ye <yezhizhenjiakang@gmail.com>

* Update components/shared/webrender/Cargo.toml

Co-authored-by: Martin Robinson <mrobinson@igalia.com>
Signed-off-by: Euclid Ye <yezhizhenjiakang@gmail.com>

---------

Signed-off-by: Euclid Ye <yezhizhenjiakang@gmail.com>
Co-authored-by: Martin Robinson <mrobinson@igalia.com>
This commit is contained in:
Euclid Ye 2025-02-14 16:14:57 +08:00 • committed by GitHub
parent 9b3e23633d
commit 03fc54e682
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12 changed files with 111 additions and 63 deletions
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25
components/layout_2020/style_ext.rs
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@ -30,8 +30,8 @@ use webrender_api as wr;
use crate::dom_traversal::Contents;
use crate::fragment_tree::FragmentFlags;
use crate::geom::{
AuOrAuto, LengthPercentageOrAuto, LogicalSides, LogicalVec2, PhysicalSides, PhysicalSize,
PhysicalVec, Size, Sizes,
AuOrAuto, LengthPercentageOrAuto, LogicalSides, LogicalVec2, PhysicalSides, PhysicalSize, Size,
Sizes,
};
use crate::table::TableLayoutStyle;
use crate::{ContainingBlock, IndefiniteContainingBlock};
@ -52,6 +52,11 @@ pub(crate) enum DisplayGeneratingBox {
/// <https://drafts.csswg.org/css-display-3/#layout-specific-display>
LayoutInternal(DisplayLayoutInternal),
}
#[derive(Clone, Copy, Debug)]
pub struct AxesOverflow {
pub x: Overflow,
pub y: Overflow,
}
impl DisplayGeneratingBox {
pub(crate) fn display_inside(&self) -> DisplayInside {
@ -301,7 +306,7 @@ pub(crate) trait ComputedValuesExt {
) -> LogicalSides<LengthPercentageOrAuto<'_>>;
fn has_transform_or_perspective(&self, fragment_flags: FragmentFlags) -> bool;
fn effective_z_index(&self, fragment_flags: FragmentFlags) -> i32;
fn effective_overflow(&self) -> PhysicalVec<Overflow>;
fn effective_overflow(&self) -> AxesOverflow;
fn establishes_block_formatting_context(&self) -> bool;
fn establishes_stacking_context(&self, fragment_flags: FragmentFlags) -> bool;
fn establishes_scroll_container(&self) -> bool;
@ -517,7 +522,7 @@ impl ComputedValuesExt for ComputedValues {
/// Get the effective overflow of this box. The property only applies to block containers,
/// flex containers, and grid containers. And some box types only accept a few values.
/// <https://www.w3.org/TR/css-overflow-3/#overflow-control>
fn effective_overflow(&self) -> PhysicalVec<Overflow> {
fn effective_overflow(&self) -> AxesOverflow {
let style_box = self.get_box();
let overflow_x = style_box.overflow_x;
let overflow_y = style_box.overflow_y;
@ -547,9 +552,15 @@ impl ComputedValuesExt for ComputedValues {
_ => false,
};
if ignores_overflow {
PhysicalVec::new(Overflow::Visible, Overflow::Visible)
AxesOverflow {
x: Overflow::Visible,
y: Overflow::Visible,
}
} else {
PhysicalVec::new(overflow_x, overflow_y)
AxesOverflow {
x: overflow_x,
y: overflow_y,
}
}
}
@ -583,6 +594,8 @@ impl ComputedValuesExt for ComputedValues {
/// Whether or not the `overflow` value of this style establishes a scroll container.
fn establishes_scroll_container(&self) -> bool {
// Checking one axis suffices, because the computed value ensures that
// either both axes are scrollable, or none is scrollable.
self.effective_overflow().x.is_scrollable()
}