mirror of
https://github.com/servo/servo.git
synced 2025-06-06 16:45:39 +00:00
100 lines
3.2 KiB
Rust
100 lines
3.2 KiB
Rust
/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at https://mozilla.org/MPL/2.0/. */
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use app_units::Au;
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use base::print_tree::PrintTree;
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use serde::Serialize;
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use servo_arc::Arc as ServoArc;
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use style::logical_geometry::WritingMode;
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use style::properties::ComputedValues;
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use super::{BaseFragment, BaseFragmentInfo, Fragment};
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use crate::cell::ArcRefCell;
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use crate::geom::{LogicalRect, PhysicalRect};
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/// Can contain child fragments with relative coordinates, but does not contribute to painting
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/// itself. [`PositioningFragment`]s may be completely anonymous, or just non-painting Fragments
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/// generated by boxes.
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#[derive(Serialize)]
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pub(crate) struct PositioningFragment {
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pub base: BaseFragment,
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pub rect: LogicalRect<Au>,
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pub children: Vec<ArcRefCell<Fragment>>,
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pub writing_mode: WritingMode,
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/// The scrollable overflow of this anonymous fragment's children.
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pub scrollable_overflow: PhysicalRect<Au>,
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/// If this fragment was created with a style, the style of the fragment.
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#[serde(skip_serializing)]
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pub style: Option<ServoArc<ComputedValues>>,
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}
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impl PositioningFragment {
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pub fn new_anonymous(
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rect: LogicalRect<Au>,
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children: Vec<Fragment>,
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mode: WritingMode,
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) -> Self {
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Self::new_with_base_fragment(BaseFragment::anonymous(), None, rect, children, mode)
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}
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pub fn new_empty(
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base_fragment_info: BaseFragmentInfo,
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rect: LogicalRect<Au>,
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style: ServoArc<ComputedValues>,
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) -> Self {
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let writing_mode = style.writing_mode;
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Self::new_with_base_fragment(
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base_fragment_info.into(),
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Some(style),
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rect,
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Vec::new(),
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writing_mode,
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)
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}
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fn new_with_base_fragment(
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base: BaseFragment,
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style: Option<ServoArc<ComputedValues>>,
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rect: LogicalRect<Au>,
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children: Vec<Fragment>,
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mode: WritingMode,
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) -> Self {
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// FIXME(mrobinson, bug 25564): We should be using the containing block
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// here to properly convert scrollable overflow to physical geometry.
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let containing_block = PhysicalRect::zero();
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let content_origin = rect.start_corner.to_physical(mode);
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let scrollable_overflow = children.iter().fold(PhysicalRect::zero(), |acc, child| {
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acc.union(
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&child
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.scrollable_overflow(&containing_block)
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.translate(content_origin.to_vector()),
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)
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});
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PositioningFragment {
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base,
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style,
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rect,
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children: children.into_iter().map(ArcRefCell::new).collect(),
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writing_mode: mode,
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scrollable_overflow,
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}
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}
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pub fn print(&self, tree: &mut PrintTree) {
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tree.new_level(format!(
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"PositioningFragment\
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\nbase={:?}\
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\nrect={:?}\
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\nscrollable_overflow={:?}",
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self.base, self.rect, self.scrollable_overflow
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));
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for child in &self.children {
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child.borrow().print(tree);
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}
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tree.end_level();
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}
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}
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