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Introduce PositioningContext
This commit is contained in:
Simon Sapin
parent
06e3d13795
commit
b43a3de51d
5 changed files with 90 additions and 69 deletions
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@ -12,7 +12,7 @@ use crate::fragments::{AnonymousFragment, BoxFragment, Fragment};
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use crate::fragments::{CollapsedBlockMargins, CollapsedMargin};
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use crate::geom::flow_relative::{Rect, Sides, Vec2};
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use crate::positioned::adjust_static_positions;
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use crate::positioned::{AbsolutelyPositionedBox, AbsolutelyPositionedFragment};
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use crate::positioned::{AbsolutelyPositionedBox, PositioningContext};
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use crate::replaced::ReplacedContent;
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use crate::style_ext::ComputedValuesExt;
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use crate::{relative_adjustement, ContainingBlock};
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@ -67,9 +67,9 @@ impl BlockFormattingContext {
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pub(super) fn layout<'a>(
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&'a self,
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layout_context: &LayoutContext,
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positioning_context: &mut PositioningContext<'a>,
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containing_block: &ContainingBlock,
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tree_rank: usize,
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absolutely_positioned_fragments: &mut Vec<AbsolutelyPositionedFragment<'a>>,
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) -> IndependentLayout {
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let mut float_context;
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let float_context = if self.contains_floats {
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@ -80,9 +80,9 @@ impl BlockFormattingContext {
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};
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let flow_layout = self.contents.layout(
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layout_context,
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positioning_context,
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containing_block,
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tree_rank,
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absolutely_positioned_fragments,
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float_context,
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CollapsibleWithParentStartMargin(false),
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);
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@ -103,27 +103,27 @@ impl BlockContainer {
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fn layout<'a>(
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&'a self,
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layout_context: &LayoutContext,
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positioning_context: &mut PositioningContext<'a>,
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containing_block: &ContainingBlock,
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tree_rank: usize,
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absolutely_positioned_fragments: &mut Vec<AbsolutelyPositionedFragment<'a>>,
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float_context: Option<&mut FloatContext>,
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collapsible_with_parent_start_margin: CollapsibleWithParentStartMargin,
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) -> FlowLayout {
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match self {
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BlockContainer::BlockLevelBoxes(child_boxes) => layout_block_level_children(
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layout_context,
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positioning_context,
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child_boxes,
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containing_block,
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tree_rank,
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absolutely_positioned_fragments,
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float_context,
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collapsible_with_parent_start_margin,
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),
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BlockContainer::InlineFormattingContext(ifc) => ifc.layout(
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layout_context,
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positioning_context,
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containing_block,
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tree_rank,
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absolutely_positioned_fragments,
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),
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}
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}
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@ -131,10 +131,10 @@ impl BlockContainer {
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fn layout_block_level_children<'a>(
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layout_context: &LayoutContext,
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positioning_context: &mut PositioningContext<'a>,
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child_boxes: &'a [Arc<BlockLevelBox>],
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containing_block: &ContainingBlock,
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tree_rank: usize,
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absolutely_positioned_fragments: &mut Vec<AbsolutelyPositionedFragment<'a>>,
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mut float_context: Option<&mut FloatContext>,
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collapsible_with_parent_start_margin: CollapsibleWithParentStartMargin,
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) -> FlowLayout {
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@ -194,7 +194,7 @@ fn layout_block_level_children<'a>(
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current_block_direction_position: Length,
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}
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let abspos_so_far = absolutely_positioned_fragments.len();
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let abspos_so_far = positioning_context.abspos.len();
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let mut placement_state = PlacementState {
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next_in_flow_margin_collapses_with_parent_start_margin:
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collapsible_with_parent_start_margin.0,
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@ -213,9 +213,9 @@ fn layout_block_level_children<'a>(
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.map(|(tree_rank, box_)| {
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let mut fragment = box_.layout(
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layout_context,
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positioning_context,
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containing_block,
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tree_rank,
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absolutely_positioned_fragments,
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float_context.as_mut().map(|c| &mut **c),
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);
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place_block_level_fragment(&mut fragment, &mut placement_state);
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@ -227,19 +227,17 @@ fn layout_block_level_children<'a>(
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.par_iter()
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.enumerate()
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.mapfold_reduce_into(
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absolutely_positioned_fragments,
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|abspos_fragments, (tree_rank, box_)| {
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positioning_context,
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|positioning_context, (tree_rank, box_)| {
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box_.layout(
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layout_context,
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positioning_context,
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containing_block,
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tree_rank,
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abspos_fragments,
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/* float_context = */ None,
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)
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},
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|left_abspos_fragments, mut right_abspos_fragments| {
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left_abspos_fragments.append(&mut right_abspos_fragments);
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},
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|left, right| left.append(right),
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)
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.collect();
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for fragment in &mut fragments {
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@ -248,7 +246,7 @@ fn layout_block_level_children<'a>(
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}
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adjust_static_positions(
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&mut absolutely_positioned_fragments[abspos_so_far..],
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&mut positioning_context.abspos[abspos_so_far..],
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&mut fragments,
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tree_rank,
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);
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@ -269,25 +267,27 @@ impl BlockLevelBox {
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fn layout<'a>(
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&'a self,
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layout_context: &LayoutContext,
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positioning_context: &mut PositioningContext<'a>,
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containing_block: &ContainingBlock,
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tree_rank: usize,
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absolutely_positioned_fragments: &mut Vec<AbsolutelyPositionedFragment<'a>>,
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float_context: Option<&mut FloatContext>,
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) -> Fragment {
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match self {
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BlockLevelBox::SameFormattingContextBlock { style, contents } => {
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Fragment::Box(layout_in_flow_non_replaced_block_level(
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layout_context,
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positioning_context,
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containing_block,
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absolutely_positioned_fragments,
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style,
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BlockLevelKind::SameFormattingContextBlock,
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|containing_block, nested_abspos, collapsible_with_parent_start_margin| {
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|positioning_context,
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containing_block,
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collapsible_with_parent_start_margin| {
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contents.layout(
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layout_context,
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positioning_context,
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containing_block,
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tree_rank,
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nested_abspos,
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float_context,
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collapsible_with_parent_start_margin,
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)
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@ -302,16 +302,16 @@ impl BlockLevelBox {
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)),
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Err(non_replaced) => Fragment::Box(layout_in_flow_non_replaced_block_level(
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layout_context,
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positioning_context,
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containing_block,
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absolutely_positioned_fragments,
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&contents.style,
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BlockLevelKind::EstablishesAnIndependentFormattingContext,
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|containing_block, nested_abspos, _| {
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|positioning_context, containing_block, _| {
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let independent_layout = non_replaced.layout(
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layout_context,
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positioning_context,
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containing_block,
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tree_rank,
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nested_abspos,
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);
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FlowLayout {
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fragments: independent_layout.fragments,
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@ -322,7 +322,9 @@ impl BlockLevelBox {
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)),
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},
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BlockLevelBox::OutOfFlowAbsolutelyPositionedBox(box_) => {
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absolutely_positioned_fragments.push(box_.layout(Vec2::zero(), tree_rank));
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positioning_context
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.abspos
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.push(box_.layout(Vec2::zero(), tree_rank));
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Fragment::Anonymous(AnonymousFragment::no_op(
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containing_block.style.writing_mode,
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))
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@ -347,13 +349,13 @@ enum BlockLevelKind {
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/// https://drafts.csswg.org/css2/visudet.html#normal-block
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fn layout_in_flow_non_replaced_block_level<'a>(
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layout_context: &LayoutContext,
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positioning_context: &mut PositioningContext<'a>,
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containing_block: &ContainingBlock,
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absolutely_positioned_fragments: &mut Vec<AbsolutelyPositionedFragment<'a>>,
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style: &Arc<ComputedValues>,
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block_level_kind: BlockLevelKind,
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layout_contents: impl FnOnce(
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&mut PositioningContext<'a>,
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&ContainingBlock,
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&mut Vec<AbsolutelyPositionedFragment<'a>>,
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CollapsibleWithParentStartMargin,
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) -> FlowLayout,
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) -> BoxFragment {
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@ -436,14 +438,14 @@ fn layout_in_flow_non_replaced_block_level<'a>(
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min_box_size.block == Length::zero() &&
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pb.block_end == Length::zero() &&
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block_level_kind == BlockLevelKind::SameFormattingContextBlock;
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let mut nested_abspos = vec![];
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let mut nested_positioning_context = PositioningContext { abspos: Vec::new() };
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let mut flow_layout = layout_contents(
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&containing_block_for_children,
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if style.get_box().position == Position::Relative {
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&mut nested_abspos
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&mut nested_positioning_context
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} else {
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absolutely_positioned_fragments
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positioning_context
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},
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&containing_block_for_children,
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this_start_margin_can_collapse_with_children,
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);
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let mut block_margins_collapsed_with_children = CollapsedBlockMargins::from_margin(&margin);
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@ -493,9 +495,8 @@ fn layout_in_flow_non_replaced_block_level<'a>(
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},
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};
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if style.get_box().position == Position::Relative {
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AbsolutelyPositionedFragment::in_positioned_containing_block(
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nested_positioning_context.layout_abspos(
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layout_context,
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&nested_abspos,
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&mut flow_layout.fragments,
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&content_rect.size,
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&padding,
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