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layout: Clean up inline layout data structures (#33149)
- Rename `InlineFormattingContextState` to `InlineFormattingContextLayout`. - Have `InlineFormattingContextLayout` hold a reference to the `InlineFormattingContext`, so that it does not need to be passed around as an argument - Have `LineItemLayout` hold a reference to `InlineFormattingContextLayout` to avoid duplicating so much data. - Rename some members of `LineItemLayout` to make it clearer what they do. - Give beter names to many lifetimes and combine some that are effectively the same. Signed-off-by: Martin Robinson <mrobinson@igalia.com> Co-authored-by: Rakhi Sharma <atbrakhi@igalia.com>
This commit is contained in:
Martin Robinson
GitHub
parent
60ef6bc461
commit
e956b53827
3 changed files with 154 additions and 194 deletions
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@ -2,8 +2,6 @@
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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 std::rc::Rc;
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use app_units::Au;
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use bitflags::bitflags;
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use fonts::{FontMetrics, GlyphStore};
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@ -20,12 +18,9 @@ use style::Zero;
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use unicode_bidi::{BidiInfo, Level};
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use webrender_api::FontInstanceKey;
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use super::inline_box::{
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InlineBoxContainerState, InlineBoxIdentifier, InlineBoxTreePathToken, InlineBoxes,
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};
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use super::{InlineFormattingContextState, LineBlockSizes};
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use super::inline_box::{InlineBoxContainerState, InlineBoxIdentifier, InlineBoxTreePathToken};
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use super::{InlineFormattingContextLayout, LineBlockSizes};
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use crate::cell::ArcRefCell;
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use crate::context::LayoutContext;
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use crate::fragment_tree::{
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BaseFragmentInfo, BoxFragment, CollapsedBlockMargins, Fragment, TextFragment,
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};
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@ -33,7 +28,6 @@ use crate::geom::{LogicalRect, LogicalVec2, ToLogical};
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use crate::positioned::{
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relative_adjustement, AbsolutelyPositionedBox, PositioningContext, PositioningContextLength,
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};
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use crate::ContainingBlock;
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pub(super) struct LineMetrics {
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/// The block offset of the line start in the containing
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@ -132,31 +126,16 @@ impl LineItemLayoutInlineContainerState {
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/// The second phase of [`super::InlineFormattingContext`] layout: once items are gathered
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/// for a line, we must lay them out and create fragments for them, properly positioning them
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/// according to their baselines and also handling absolutely positioned children.
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pub(super) struct LineItemLayout<'a> {
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/// The set of [`super::InlineBox`]es for the [`super::InlineFormattingContext`]. This
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/// does *not* include any state from during phase one of layout.
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pub inline_boxes: &'a InlineBoxes,
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/// The set of [`super::InlineBoxContainerState`] from phase one of IFC layout. There is
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/// one of these for every inline box, *not* for the root inline container.
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pub inline_box_states: &'a [Rc<InlineBoxContainerState>],
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pub(super) struct LineItemLayout<'layout_data, 'layout> {
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/// The state of the overall [`super::InlineFormattingContext`] layout.
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layout: &'layout mut InlineFormattingContextLayout<'layout_data>,
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/// The set of [`super::LineItemLayoutInlineContainerState`] created while laying out items
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/// on this line. This does not include the current level of recursion.
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pub state_stack: Vec<LineItemLayoutInlineContainerState>,
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/// The current [`super::LineItemLayoutInlineContainerState`].
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pub state: LineItemLayoutInlineContainerState,
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/// The [`LayoutContext`] to use for laying out absolutely positioned line items.
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pub layout_context: &'a LayoutContext<'a>,
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/// The root positioning context for this layout.
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pub root_positioning_context: &'a mut PositioningContext,
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/// The [`ContainingBlock`] of the parent [`super::InlineFormattingContext`] of the line being
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/// laid out.
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pub ifc_containing_block: &'a ContainingBlock<'a>,
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pub current_state: LineItemLayoutInlineContainerState,
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/// The metrics of this line, which should remain constant throughout the
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/// layout process.
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@ -167,9 +146,9 @@ pub(super) struct LineItemLayout<'a> {
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pub justification_adjustment: Au,
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}
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impl<'a> LineItemLayout<'a> {
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impl<'layout_data, 'layout> LineItemLayout<'layout_data, 'layout> {
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pub(super) fn layout_line_items(
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state: &mut InlineFormattingContextState,
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layout: &mut InlineFormattingContextLayout,
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line_items: Vec<LineItem>,
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start_position: LogicalVec2<Au>,
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effective_block_advance: &LineBlockSizes,
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@ -177,13 +156,12 @@ impl<'a> LineItemLayout<'a> {
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) -> Vec<Fragment> {
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let baseline_offset = effective_block_advance.find_baseline_offset();
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LineItemLayout {
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inline_boxes: state.inline_boxes,
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inline_box_states: &state.inline_box_states,
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layout,
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state_stack: Vec::new(),
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root_positioning_context: state.positioning_context,
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layout_context: state.layout_context,
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state: LineItemLayoutInlineContainerState::root(start_position.inline, baseline_offset),
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ifc_containing_block: state.containing_block,
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current_state: LineItemLayoutInlineContainerState::root(
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start_position.inline,
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baseline_offset,
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),
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line_metrics: LineMetrics {
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block_offset: start_position.block,
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block_size: effective_block_advance.resolve(),
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@ -191,7 +169,7 @@ impl<'a> LineItemLayout<'a> {
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},
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justification_adjustment,
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}
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.layout(line_items, state.has_right_to_left_content)
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.layout(line_items)
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}
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/// Start and end inline boxes in tree order, so that it reflects the given inline box.
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@ -207,8 +185,10 @@ impl<'a> LineItemLayout<'a> {
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// Otherwise, follow the path given to us by our collection of inline boxes, so we know which
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// inline boxes to start and end.
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let path = self
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.layout
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.ifc
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.inline_boxes
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.get_path(self.state.identifier, new_inline_box);
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.get_path(self.current_state.identifier, new_inline_box);
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for token in path {
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match token {
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InlineBoxTreePathToken::Start(ref identifier) => self.start_inline_box(identifier),
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@ -217,12 +197,8 @@ impl<'a> LineItemLayout<'a> {
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}
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}
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pub(super) fn layout(
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&mut self,
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mut line_items: Vec<LineItem>,
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has_right_to_left_content: bool,
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) -> Vec<Fragment> {
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let mut last_level: Level = Level::ltr();
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pub(super) fn layout(&mut self, mut line_items: Vec<LineItem>) -> Vec<Fragment> {
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let mut last_level = Level::ltr();
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let levels: Vec<_> = line_items
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.iter()
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.map(|item| {
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@ -246,7 +222,7 @@ impl<'a> LineItemLayout<'a> {
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})
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.collect();
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if has_right_to_left_content {
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if self.layout.ifc.has_right_to_left_content {
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sort_by_indices_in_place(&mut line_items, BidiInfo::reorder_visual(&levels));
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}
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@ -257,17 +233,17 @@ impl<'a> LineItemLayout<'a> {
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// any in the inline formatting context.
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self.prepare_layout_for_inline_box(item.inline_box_identifier());
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self.state
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self.current_state
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.flags
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.insert(LineLayoutInlineContainerFlags::HAD_ANY_LINE_ITEMS);
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match item {
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LineItem::StartInlineBoxPaddingBorderMargin(_) => {
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self.state
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self.current_state
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.flags
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.insert(LineLayoutInlineContainerFlags::HAD_START_PBM);
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},
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LineItem::EndInlineBoxPaddingBorderMargin(_) => {
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self.state
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self.current_state
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.flags
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.insert(LineLayoutInlineContainerFlags::HAD_END_PBM);
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},
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@ -280,12 +256,13 @@ impl<'a> LineItemLayout<'a> {
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// Move back to the root of the inline box tree, so that all boxes are ended.
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self.prepare_layout_for_inline_box(None);
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std::mem::take(&mut self.state.fragments)
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std::mem::take(&mut self.current_state.fragments)
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}
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fn current_positioning_context_mut(&mut self) -> &mut PositioningContext {
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if let Either::First(ref mut positioning_context) =
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self.state.positioning_context_or_start_offset_in_parent
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if let Either::First(ref mut positioning_context) = self
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.current_state
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.positioning_context_or_start_offset_in_parent
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{
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return positioning_context;
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}
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@ -298,12 +275,13 @@ impl<'a> LineItemLayout<'a> {
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Either::Second(_) => None,
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},
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)
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.unwrap_or(self.root_positioning_context)
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.unwrap_or(self.layout.positioning_context)
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}
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fn start_inline_box(&mut self, identifier: &InlineBoxIdentifier) {
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let inline_box_state = &*self.inline_box_states[identifier.index_in_inline_boxes as usize];
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let inline_box = self.inline_boxes.get(identifier);
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let inline_box_state =
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&*self.layout.inline_box_states[identifier.index_in_inline_boxes as usize];
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let inline_box = self.layout.ifc.inline_boxes.get(identifier);
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let inline_box = &*(inline_box.borrow());
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let style = &inline_box.style;
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@ -318,12 +296,12 @@ impl<'a> LineItemLayout<'a> {
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};
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let parent_offset = LogicalVec2 {
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inline: self.state.inline_advance + self.state.parent_offset.inline,
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inline: self.current_state.inline_advance + self.current_state.parent_offset.inline,
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block: block_start_offset,
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};
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let outer_state = std::mem::replace(
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&mut self.state,
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&mut self.current_state,
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LineItemLayoutInlineContainerState::new(
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Some(*identifier),
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parent_offset,
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@ -337,11 +315,12 @@ impl<'a> LineItemLayout<'a> {
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fn end_inline_box(&mut self) {
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let outer_state = self.state_stack.pop().expect("Ended unknown inline box");
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let mut inner_state = std::mem::replace(&mut self.state, outer_state);
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let mut inner_state = std::mem::replace(&mut self.current_state, outer_state);
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let identifier = inner_state.identifier.expect("Ended unknown inline box");
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let inline_box_state = &*self.inline_box_states[identifier.index_in_inline_boxes as usize];
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let inline_box = self.inline_boxes.get(&identifier);
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let inline_box_state =
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&*self.layout.inline_box_states[identifier.index_in_inline_boxes as usize];
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let inline_box = self.layout.ifc.inline_boxes.get(&identifier);
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let inline_box = &*(inline_box.borrow());
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let mut padding = inline_box_state.pbm.padding;
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@ -379,8 +358,8 @@ impl<'a> LineItemLayout<'a> {
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// Make `content_rect` relative to the parent Fragment.
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let mut content_rect = LogicalRect {
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start_corner: LogicalVec2 {
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inline: self.state.inline_advance + pbm_sums.inline_start,
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block: inner_state.parent_offset.block - self.state.parent_offset.block,
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inline: self.current_state.inline_advance + pbm_sums.inline_start,
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block: inner_state.parent_offset.block - self.current_state.parent_offset.block,
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},
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size: LogicalVec2 {
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inline: inner_state.inline_advance,
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@ -388,7 +367,7 @@ impl<'a> LineItemLayout<'a> {
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},
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};
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let ifc_writing_mode = self.ifc_containing_block.effective_writing_mode();
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let ifc_writing_mode = self.layout.containing_block.effective_writing_mode();
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if inner_state
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.flags
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.contains(LineLayoutInlineContainerFlags::HAD_ANY_FLOATS)
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@ -405,7 +384,7 @@ impl<'a> LineItemLayout<'a> {
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// do it right before creating the Fragment.
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let style = &inline_box.style;
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if style.clone_position().is_relative() {
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content_rect.start_corner += relative_adjustement(style, self.ifc_containing_block);
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content_rect.start_corner += relative_adjustement(style, self.layout.containing_block);
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}
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let mut fragment = BoxFragment::new(
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@ -422,7 +401,8 @@ impl<'a> LineItemLayout<'a> {
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match inner_state.positioning_context_or_start_offset_in_parent {
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Either::First(mut positioning_context) => {
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positioning_context.layout_collected_children(self.layout_context, &mut fragment);
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positioning_context
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.layout_collected_children(self.layout.layout_context, &mut fragment);
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positioning_context.adjust_static_position_of_hoisted_fragments_with_offset(
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&fragment.content_rect.origin.to_logical(ifc_writing_mode),
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PositioningContextLength::zero(),
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@ -439,8 +419,8 @@ impl<'a> LineItemLayout<'a> {
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},
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}
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self.state.inline_advance += inner_state.inline_advance + pbm_sums.inline_sum();
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self.state.fragments.push(Fragment::Box(fragment));
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self.current_state.inline_advance += inner_state.inline_advance + pbm_sums.inline_sum();
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self.current_state.fragments.push(Fragment::Box(fragment));
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}
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fn calculate_inline_box_block_start(
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@ -496,10 +476,10 @@ impl<'a> LineItemLayout<'a> {
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// inline box's strut), but for children of the inline formatting context root or for
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// fallback fonts that use baseline relative alignment, it might be different.
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let start_corner = LogicalVec2 {
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inline: self.state.inline_advance,
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block: self.state.baseline_offset -
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inline: self.current_state.inline_advance,
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block: self.current_state.baseline_offset -
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text_item.font_metrics.ascent -
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self.state.parent_offset.block,
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self.current_state.parent_offset.block,
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};
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let rect = LogicalRect {
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@ -510,17 +490,19 @@ impl<'a> LineItemLayout<'a> {
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},
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};
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self.state.inline_advance += inline_advance;
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self.state.fragments.push(Fragment::Text(TextFragment {
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base: text_item.base_fragment_info.into(),
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parent_style: text_item.parent_style,
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rect: rect.to_physical(self.ifc_containing_block.effective_writing_mode()),
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font_metrics: text_item.font_metrics,
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font_key: text_item.font_key,
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glyphs: text_item.text,
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text_decoration_line: text_item.text_decoration_line,
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justification_adjustment: self.justification_adjustment,
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}));
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self.current_state.inline_advance += inline_advance;
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self.current_state
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.fragments
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.push(Fragment::Text(TextFragment {
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base: text_item.base_fragment_info.into(),
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parent_style: text_item.parent_style,
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rect: rect.to_physical(self.layout.containing_block.effective_writing_mode()),
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font_metrics: text_item.font_metrics,
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font_key: text_item.font_key,
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glyphs: text_item.text,
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text_decoration_line: text_item.text_decoration_line,
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justification_adjustment: self.justification_adjustment,
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}));
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}
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fn layout_atomic(&mut self, mut atomic: AtomicLineItem) {
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@ -529,17 +511,17 @@ impl<'a> LineItemLayout<'a> {
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// This needs to be added to the calculated block and inline positions.
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// Make the final result relative to the parent box.
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let mut atomic_offset = LogicalVec2 {
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inline: self.state.inline_advance,
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inline: self.current_state.inline_advance,
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block: atomic.calculate_block_start(&self.line_metrics) -
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self.state.parent_offset.block,
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self.current_state.parent_offset.block,
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};
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if atomic.fragment.style.clone_position().is_relative() {
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atomic_offset +=
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relative_adjustement(&atomic.fragment.style, self.ifc_containing_block);
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relative_adjustement(&atomic.fragment.style, self.layout.containing_block);
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}
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let ifc_writing_mode = self.ifc_containing_block.effective_writing_mode();
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let ifc_writing_mode = self.layout.containing_block.effective_writing_mode();
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atomic.fragment.content_rect.origin += atomic_offset.to_physical_size(ifc_writing_mode);
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if let Some(mut positioning_context) = atomic.positioning_context {
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|
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@ -555,8 +537,10 @@ impl<'a> LineItemLayout<'a> {
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.append(positioning_context);
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}
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self.state.inline_advance += atomic.size.inline;
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self.state.fragments.push(Fragment::Box(atomic.fragment));
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self.current_state.inline_advance += atomic.size.inline;
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self.current_state
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.fragments
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.push(Fragment::Box(atomic.fragment));
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}
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fn layout_absolute(&mut self, absolute: AbsolutelyPositionedLineItem) {
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|
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@ -579,31 +563,31 @@ impl<'a> LineItemLayout<'a> {
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if style.get_box().original_display.outside() == DisplayOutside::Inline {
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// Top of the line at the current inline position.
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LogicalVec2 {
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inline: self.state.inline_advance,
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block: -self.state.parent_offset.block,
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inline: self.current_state.inline_advance,
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block: -self.current_state.parent_offset.block,
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}
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} else {
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// After the bottom of the line at the start of the inline formatting context.
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LogicalVec2 {
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inline: -self.state.parent_offset.inline,
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block: self.line_metrics.block_size - self.state.parent_offset.block,
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inline: -self.current_state.parent_offset.inline,
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block: self.line_metrics.block_size - self.current_state.parent_offset.block,
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}
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};
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let hoisted_box = AbsolutelyPositionedBox::to_hoisted(
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absolute.absolutely_positioned_box.clone(),
|
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initial_start_corner.into(),
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self.ifc_containing_block,
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self.layout.containing_block,
|
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);
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let hoisted_fragment = hoisted_box.fragment.clone();
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self.current_positioning_context_mut().push(hoisted_box);
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self.state
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self.current_state
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.fragments
|
||||
.push(Fragment::AbsoluteOrFixedPositioned(hoisted_fragment));
|
||||
}
|
||||
|
||||
fn layout_float(&mut self, mut float: FloatLineItem) {
|
||||
self.state
|
||||
self.current_state
|
||||
.flags
|
||||
.insert(LineLayoutInlineContainerFlags::HAD_ANY_FLOATS);
|
||||
|
||||
|
|
@ -613,12 +597,14 @@ impl<'a> LineItemLayout<'a> {
|
|||
// formatting context, so that they are parented properly for StackingContext
|
||||
// properties such as opacity & filters.
|
||||
let distance_from_parent_to_ifc = LogicalVec2 {
|
||||
inline: self.state.parent_offset.inline,
|
||||
block: self.line_metrics.block_offset + self.state.parent_offset.block,
|
||||
inline: self.current_state.parent_offset.inline,
|
||||
block: self.line_metrics.block_offset + self.current_state.parent_offset.block,
|
||||
};
|
||||
float.fragment.content_rect.origin -= distance_from_parent_to_ifc
|
||||
.to_physical_size(self.ifc_containing_block.effective_writing_mode());
|
||||
self.state.fragments.push(Fragment::Float(float.fragment));
|
||||
.to_physical_size(self.layout.containing_block.effective_writing_mode());
|
||||
self.current_state
|
||||
.fragments
|
||||
.push(Fragment::Float(float.fragment));
|
||||
}
|
||||
}
|
||||
|
||||
|
|
|
|||
|
|
@ -196,11 +196,11 @@ pub(crate) enum InlineItem {
|
|||
}
|
||||
|
||||
/// Information about the current line under construction for a particular
|
||||
/// [`InlineFormattingContextState`]. This tracks position and size information while
|
||||
/// [`InlineFormattingContextLayout`]. This tracks position and size information while
|
||||
/// [`LineItem`]s are collected and is used as input when those [`LineItem`]s are
|
||||
/// converted into [`Fragment`]s during the final phase of line layout. Note that this
|
||||
/// does not store the [`LineItem`]s themselves, as they are stored as part of the
|
||||
/// nesting state in the [`InlineFormattingContextState`].
|
||||
/// nesting state in the [`InlineFormattingContextLayout`].
|
||||
struct LineUnderConstruction {
|
||||
/// The position where this line will start once it is laid out. This includes any
|
||||
/// offset from `text-indent`.
|
||||
|
|
@ -552,19 +552,14 @@ pub(super) struct InlineContainerState {
|
|||
font_metrics: FontMetrics,
|
||||
}
|
||||
|
||||
pub(super) struct InlineFormattingContextState<'a, 'b> {
|
||||
positioning_context: &'a mut PositioningContext,
|
||||
containing_block: &'b ContainingBlock<'b>,
|
||||
sequential_layout_state: Option<&'a mut SequentialLayoutState>,
|
||||
layout_context: &'b LayoutContext<'b>,
|
||||
pub(super) struct InlineFormattingContextLayout<'layout_data> {
|
||||
positioning_context: &'layout_data mut PositioningContext,
|
||||
containing_block: &'layout_data ContainingBlock<'layout_data>,
|
||||
sequential_layout_state: Option<&'layout_data mut SequentialLayoutState>,
|
||||
layout_context: &'layout_data LayoutContext<'layout_data>,
|
||||
|
||||
/// The inline boxes collection of the [`InlineFormattingContext`] that this
|
||||
/// state is laying out.
|
||||
inline_boxes: &'a InlineBoxes,
|
||||
|
||||
/// The list of [`FontMetrics`] used by the [`InlineFormattingContext`] that
|
||||
/// we are laying out.
|
||||
fonts: &'a Vec<FontKeyAndMetrics>,
|
||||
/// The [`InlineFormattingContext`] that we are laying out.
|
||||
ifc: &'layout_data InlineFormattingContext,
|
||||
|
||||
/// The [`InlineContainerState`] for the container formed by the root of the
|
||||
/// [`InlineFormattingContext`]. This is effectively the "root inline box" described
|
||||
|
|
@ -616,7 +611,7 @@ pub(super) struct InlineFormattingContextState<'a, 'b> {
|
|||
/// In this case, the `<span>` should not extend to the second line. If we linebreak
|
||||
/// as soon as we encounter the `<br>` the `<span>`'s ending inline borders would be
|
||||
/// placed on the second line, because we add those borders in
|
||||
/// [`InlineFormattingContextState::finish_inline_box()`].
|
||||
/// [`InlineFormattingContextLayout::finish_inline_box()`].
|
||||
linebreak_before_new_content: bool,
|
||||
|
||||
/// When a `<br>` element has `clear`, this needs to be applied after the linebreak,
|
||||
|
|
@ -633,13 +628,13 @@ pub(super) struct InlineFormattingContextState<'a, 'b> {
|
|||
had_inflow_content: bool,
|
||||
|
||||
/// The currently white-space-collapse setting of this line. This is stored on the
|
||||
/// [`InlineFormattingContextState`] because when a soft wrap opportunity is defined
|
||||
/// [`InlineFormattingContextLayout`] because when a soft wrap opportunity is defined
|
||||
/// by the boundary between two characters, the white-space-collapse property of their
|
||||
/// nearest common ancestor is used.
|
||||
white_space_collapse: WhiteSpaceCollapse,
|
||||
|
||||
/// The currently text-wrap-mode setting of this line. This is stored on the
|
||||
/// [`InlineFormattingContextState`] because when a soft wrap opportunity is defined
|
||||
/// [`InlineFormattingContextLayout`] because when a soft wrap opportunity is defined
|
||||
/// by the boundary between two characters, the text-wrap-mode property of their nearest
|
||||
/// common ancestor is used.
|
||||
text_wrap_mode: TextWrapMode,
|
||||
|
|
@ -648,12 +643,9 @@ pub(super) struct InlineFormattingContextState<'a, 'b> {
|
|||
/// are laying out. This is used to propagate baselines to the ancestors of
|
||||
/// `display: inline-block` elements and table content.
|
||||
baselines: Baselines,
|
||||
|
||||
/// Whether or not the [`InlineFormattingContext`] being laid out has right-to-left content.
|
||||
has_right_to_left_content: bool,
|
||||
}
|
||||
|
||||
impl<'a, 'b> InlineFormattingContextState<'a, 'b> {
|
||||
impl<'layout_dta> InlineFormattingContextLayout<'layout_dta> {
|
||||
fn current_inline_container_state(&self) -> &InlineContainerState {
|
||||
match self.inline_box_state_stack.last() {
|
||||
Some(inline_box_state) => &inline_box_state.base,
|
||||
|
|
@ -706,7 +698,7 @@ impl<'a, 'b> InlineFormattingContextState<'a, 'b> {
|
|||
inline_box.is_last_fragment,
|
||||
inline_box
|
||||
.default_font_index
|
||||
.map(|index| &self.fonts[index].metrics),
|
||||
.map(|index| &self.ifc.font_metrics[index].metrics),
|
||||
);
|
||||
|
||||
// If we are starting a `<br>` element prepare to clear after its deferred linebreak has been
|
||||
|
|
@ -799,7 +791,7 @@ impl<'a, 'b> InlineFormattingContextState<'a, 'b> {
|
|||
|
||||
/// Finish layout of all inline boxes for the current line. This will gather all
|
||||
/// [`LineItem`]s and turn them into [`Fragment`]s, then reset the
|
||||
/// [`InlineFormattingContextState`] preparing it for laying out a new line.
|
||||
/// [`InlineFormattingContextLayout`] preparing it for laying out a new line.
|
||||
fn finish_current_line_and_reset(&mut self, last_line_or_forced_line_break: bool) {
|
||||
let whitespace_trimmed = self.current_line.trim_trailing_whitespace();
|
||||
let (inline_start_position, justification_adjustment) = self
|
||||
|
|
@ -1265,7 +1257,7 @@ impl<'a, 'b> InlineFormattingContextState<'a, 'b> {
|
|||
// If the metrics of this font don't match the default font, we are likely using a fallback
|
||||
// font and need to adjust the line size to account for a potentially different font.
|
||||
// If somehow the metrics match, the line size won't change.
|
||||
let ifc_font_info = &self.fonts[font_index];
|
||||
let ifc_font_info = &self.ifc.font_metrics[font_index];
|
||||
let font_metrics = ifc_font_info.metrics.clone();
|
||||
let using_fallback_font =
|
||||
self.current_inline_container_state().font_metrics != font_metrics;
|
||||
|
|
@ -1609,13 +1601,12 @@ impl InlineFormattingContext {
|
|||
.insert(InlineContainerStateFlags::IS_SINGLE_LINE_TEXT_INPUT);
|
||||
}
|
||||
|
||||
let mut ifc = InlineFormattingContextState {
|
||||
let mut layout = InlineFormattingContextLayout {
|
||||
positioning_context,
|
||||
containing_block,
|
||||
sequential_layout_state,
|
||||
layout_context,
|
||||
inline_boxes: &self.inline_boxes,
|
||||
fonts: &self.font_metrics,
|
||||
ifc: self,
|
||||
fragments: Vec::new(),
|
||||
current_line: LineUnderConstruction::new(LogicalVec2 {
|
||||
inline: first_line_inline_start,
|
||||
|
|
@ -1638,13 +1629,12 @@ impl InlineFormattingContext {
|
|||
white_space_collapse: style_text.white_space_collapse,
|
||||
text_wrap_mode: style_text.text_wrap_mode,
|
||||
baselines: Baselines::default(),
|
||||
has_right_to_left_content: self.has_right_to_left_content,
|
||||
};
|
||||
|
||||
// FIXME(pcwalton): This assumes that margins never collapse through inline formatting
|
||||
// contexts (i.e. that inline formatting contexts are never empty). Is that right?
|
||||
// FIXME(mrobinson): This should not happen if the IFC collapses through.
|
||||
if let Some(ref mut sequential_layout_state) = ifc.sequential_layout_state {
|
||||
if let Some(ref mut sequential_layout_state) = layout.sequential_layout_state {
|
||||
sequential_layout_state.collapse_margins();
|
||||
// FIXME(mrobinson): Collapse margins in the containing block offsets as well??
|
||||
}
|
||||
|
|
@ -1654,51 +1644,49 @@ impl InlineFormattingContext {
|
|||
|
||||
// Any new box should flush a pending hard line break.
|
||||
if !matches!(item, InlineItem::EndInlineBox) {
|
||||
ifc.possibly_flush_deferred_forced_line_break();
|
||||
layout.possibly_flush_deferred_forced_line_break();
|
||||
}
|
||||
|
||||
match item {
|
||||
InlineItem::StartInlineBox(identifier) => {
|
||||
ifc.start_inline_box(&self.inline_boxes.get(identifier).borrow());
|
||||
layout.start_inline_box(&self.inline_boxes.get(identifier).borrow());
|
||||
},
|
||||
InlineItem::EndInlineBox => ifc.finish_inline_box(),
|
||||
InlineItem::TextRun(run) => run.layout_into_line_items(&mut ifc),
|
||||
InlineItem::EndInlineBox => layout.finish_inline_box(),
|
||||
InlineItem::TextRun(run) => run.layout_into_line_items(&mut layout),
|
||||
InlineItem::Atomic(atomic_formatting_context, offset_in_text, bidi_level) => {
|
||||
atomic_formatting_context.layout_into_line_items(
|
||||
layout_context,
|
||||
self,
|
||||
&mut ifc,
|
||||
&mut layout,
|
||||
*offset_in_text,
|
||||
*bidi_level,
|
||||
);
|
||||
},
|
||||
InlineItem::OutOfFlowAbsolutelyPositionedBox(positioned_box, _) => {
|
||||
ifc.push_line_item_to_unbreakable_segment(LineItem::AbsolutelyPositioned(
|
||||
ifc.current_inline_box_identifier(),
|
||||
layout.push_line_item_to_unbreakable_segment(LineItem::AbsolutelyPositioned(
|
||||
layout.current_inline_box_identifier(),
|
||||
AbsolutelyPositionedLineItem {
|
||||
absolutely_positioned_box: positioned_box.clone(),
|
||||
},
|
||||
));
|
||||
},
|
||||
InlineItem::OutOfFlowFloatBox(ref mut float_box) => {
|
||||
float_box.layout_into_line_items(layout_context, &mut ifc);
|
||||
float_box.layout_into_line_items(&mut layout);
|
||||
},
|
||||
}
|
||||
}
|
||||
|
||||
ifc.finish_last_line();
|
||||
layout.finish_last_line();
|
||||
|
||||
let mut collapsible_margins_in_children = CollapsedBlockMargins::zero();
|
||||
let content_block_size = ifc.current_line.start_position.block;
|
||||
collapsible_margins_in_children.collapsed_through = !ifc.had_inflow_content &&
|
||||
let content_block_size = layout.current_line.start_position.block;
|
||||
collapsible_margins_in_children.collapsed_through = !layout.had_inflow_content &&
|
||||
content_block_size == Au::zero() &&
|
||||
collapsible_with_parent_start_margin.0;
|
||||
|
||||
FlowLayout {
|
||||
fragments: ifc.fragments,
|
||||
fragments: layout.fragments,
|
||||
content_block_size: content_block_size.into(),
|
||||
collapsible_margins_in_children,
|
||||
baselines: ifc.baselines,
|
||||
baselines: layout.baselines,
|
||||
}
|
||||
}
|
||||
|
||||
|
|
@ -1913,18 +1901,13 @@ impl InlineContainerState {
|
|||
impl IndependentFormattingContext {
|
||||
fn layout_into_line_items(
|
||||
&mut self,
|
||||
layout_context: &LayoutContext,
|
||||
inline_formatting_context: &InlineFormattingContext,
|
||||
inline_formatting_context_state: &mut InlineFormattingContextState,
|
||||
layout: &mut InlineFormattingContextLayout,
|
||||
offset_in_text: usize,
|
||||
bidi_level: Level,
|
||||
) {
|
||||
let style = self.style();
|
||||
let container_writing_mode = inline_formatting_context_state
|
||||
.containing_block
|
||||
.style
|
||||
.effective_writing_mode();
|
||||
let pbm = style.padding_border_margin(inline_formatting_context_state.containing_block);
|
||||
let container_writing_mode = layout.containing_block.style.effective_writing_mode();
|
||||
let pbm = style.padding_border_margin(layout.containing_block);
|
||||
let margin = pbm.margin.auto_is(Au::zero);
|
||||
let pbm_sums = pbm.padding + pbm.border + margin;
|
||||
let pbm_physical_origin = pbm_sums
|
||||
|
|
@ -1938,7 +1921,7 @@ impl IndependentFormattingContext {
|
|||
let size = replaced
|
||||
.contents
|
||||
.used_size_as_if_inline_element(
|
||||
inline_formatting_context_state.containing_block,
|
||||
layout.containing_block,
|
||||
&replaced.style,
|
||||
None,
|
||||
&pbm,
|
||||
|
|
@ -1962,22 +1945,21 @@ impl IndependentFormattingContext {
|
|||
IndependentFormattingContext::NonReplaced(non_replaced) => {
|
||||
let box_size = non_replaced
|
||||
.style
|
||||
.content_box_size(inline_formatting_context_state.containing_block, &pbm);
|
||||
.content_box_size(layout.containing_block, &pbm);
|
||||
let max_box_size = non_replaced
|
||||
.style
|
||||
.content_max_box_size(inline_formatting_context_state.containing_block, &pbm);
|
||||
.content_max_box_size(layout.containing_block, &pbm);
|
||||
let min_box_size = non_replaced
|
||||
.style
|
||||
.content_min_box_size(inline_formatting_context_state.containing_block, &pbm)
|
||||
.content_min_box_size(layout.containing_block, &pbm)
|
||||
.auto_is(Length::zero);
|
||||
|
||||
// https://drafts.csswg.org/css2/visudet.html#inlineblock-width
|
||||
let tentative_inline_size = box_size.inline.auto_is(|| {
|
||||
let available_size =
|
||||
inline_formatting_context_state.containing_block.inline_size -
|
||||
pbm_sums.inline_sum();
|
||||
layout.containing_block.inline_size - pbm_sums.inline_sum();
|
||||
non_replaced
|
||||
.inline_content_sizes(layout_context)
|
||||
.inline_content_sizes(layout.layout_context)
|
||||
.shrink_to_fit(available_size)
|
||||
.into()
|
||||
});
|
||||
|
|
@ -1994,11 +1976,7 @@ impl IndependentFormattingContext {
|
|||
style: &non_replaced.style,
|
||||
};
|
||||
assert_eq!(
|
||||
inline_formatting_context_state
|
||||
.containing_block
|
||||
.style
|
||||
.writing_mode
|
||||
.is_horizontal(),
|
||||
layout.containing_block.style.writing_mode.is_horizontal(),
|
||||
containing_block_for_children
|
||||
.style
|
||||
.writing_mode
|
||||
|
|
@ -2013,10 +1991,10 @@ impl IndependentFormattingContext {
|
|||
true, /* collects_for_nearest_positioned_ancestor */
|
||||
));
|
||||
let independent_layout = non_replaced.layout(
|
||||
layout_context,
|
||||
layout.layout_context,
|
||||
child_positioning_context.as_mut().unwrap(),
|
||||
&containing_block_for_children,
|
||||
inline_formatting_context_state.containing_block,
|
||||
layout.containing_block,
|
||||
);
|
||||
let (inline_size, block_size) =
|
||||
match independent_layout.content_inline_size_for_table {
|
||||
|
|
@ -2061,11 +2039,12 @@ impl IndependentFormattingContext {
|
|||
},
|
||||
};
|
||||
|
||||
if inline_formatting_context_state.text_wrap_mode == TextWrapMode::Wrap &&
|
||||
!inline_formatting_context
|
||||
if layout.text_wrap_mode == TextWrapMode::Wrap &&
|
||||
!layout
|
||||
.ifc
|
||||
.previous_character_prevents_soft_wrap_opportunity(offset_in_text)
|
||||
{
|
||||
inline_formatting_context_state.process_soft_wrap_opportunity();
|
||||
layout.process_soft_wrap_opportunity();
|
||||
}
|
||||
|
||||
let size = pbm_sums.sum() +
|
||||
|
|
@ -2078,18 +2057,15 @@ impl IndependentFormattingContext {
|
|||
.map(|baseline| pbm_sums.block_start + baseline)
|
||||
.unwrap_or(size.block);
|
||||
|
||||
let (block_sizes, baseline_offset_in_parent) = self.get_block_sizes_and_baseline_offset(
|
||||
inline_formatting_context_state,
|
||||
size.block,
|
||||
baseline_offset,
|
||||
);
|
||||
inline_formatting_context_state.update_unbreakable_segment_for_new_content(
|
||||
let (block_sizes, baseline_offset_in_parent) =
|
||||
self.get_block_sizes_and_baseline_offset(layout, size.block, baseline_offset);
|
||||
layout.update_unbreakable_segment_for_new_content(
|
||||
&block_sizes,
|
||||
size.inline,
|
||||
SegmentContentFlags::empty(),
|
||||
);
|
||||
inline_formatting_context_state.push_line_item_to_unbreakable_segment(LineItem::Atomic(
|
||||
inline_formatting_context_state.current_inline_box_identifier(),
|
||||
layout.push_line_item_to_unbreakable_segment(LineItem::Atomic(
|
||||
layout.current_inline_box_identifier(),
|
||||
AtomicLineItem {
|
||||
fragment,
|
||||
size,
|
||||
|
|
@ -2102,9 +2078,11 @@ impl IndependentFormattingContext {
|
|||
|
||||
// If there's a soft wrap opportunity following this atomic, defer a soft wrap opportunity
|
||||
// for when we next process text content.
|
||||
if !inline_formatting_context.next_character_prevents_soft_wrap_opportunity(offset_in_text)
|
||||
if !layout
|
||||
.ifc
|
||||
.next_character_prevents_soft_wrap_opportunity(offset_in_text)
|
||||
{
|
||||
inline_formatting_context_state.have_deferred_soft_wrap_opportunity = true;
|
||||
layout.have_deferred_soft_wrap_opportunity = true;
|
||||
}
|
||||
}
|
||||
|
||||
|
|
@ -2128,7 +2106,7 @@ impl IndependentFormattingContext {
|
|||
|
||||
fn get_block_sizes_and_baseline_offset(
|
||||
&self,
|
||||
ifc: &InlineFormattingContextState,
|
||||
ifc: &InlineFormattingContextLayout,
|
||||
block_size: Au,
|
||||
baseline_offset_in_content_area: Au,
|
||||
) -> (LineBlockSizes, Au) {
|
||||
|
|
@ -2163,18 +2141,14 @@ impl IndependentFormattingContext {
|
|||
}
|
||||
|
||||
impl FloatBox {
|
||||
fn layout_into_line_items(
|
||||
&mut self,
|
||||
layout_context: &LayoutContext,
|
||||
ifc: &mut InlineFormattingContextState,
|
||||
) {
|
||||
fn layout_into_line_items(&mut self, layout: &mut InlineFormattingContextLayout) {
|
||||
let fragment = self.layout(
|
||||
layout_context,
|
||||
ifc.positioning_context,
|
||||
ifc.containing_block,
|
||||
layout.layout_context,
|
||||
layout.positioning_context,
|
||||
layout.containing_block,
|
||||
);
|
||||
ifc.push_line_item_to_unbreakable_segment(LineItem::Float(
|
||||
ifc.current_inline_box_identifier(),
|
||||
layout.push_line_item_to_unbreakable_segment(LineItem::Float(
|
||||
layout.current_inline_box_identifier(),
|
||||
FloatLineItem {
|
||||
fragment,
|
||||
needs_placement: true,
|
||||
|
|
@ -2183,7 +2157,7 @@ impl FloatBox {
|
|||
}
|
||||
}
|
||||
|
||||
fn place_pending_floats(ifc: &mut InlineFormattingContextState, line_items: &mut [LineItem]) {
|
||||
fn place_pending_floats(ifc: &mut InlineFormattingContextLayout, line_items: &mut [LineItem]) {
|
||||
for item in line_items.iter_mut() {
|
||||
if let LineItem::Float(_, float_line_item) = item {
|
||||
if float_line_item.needs_placement {
|
||||
|
|
@ -2282,8 +2256,8 @@ fn inline_container_needs_strut(
|
|||
}
|
||||
|
||||
/// A struct which takes care of computing [`ContentSizes`] for an [`InlineFormattingContext`].
|
||||
struct ContentSizesComputation<'a> {
|
||||
layout_context: &'a LayoutContext<'a>,
|
||||
struct ContentSizesComputation<'layout_data> {
|
||||
layout_context: &'layout_data LayoutContext<'layout_data>,
|
||||
containing_block_writing_mode: WritingMode,
|
||||
paragraph: ContentSizes,
|
||||
current_line: ContentSizes,
|
||||
|
|
@ -2297,7 +2271,7 @@ struct ContentSizesComputation<'a> {
|
|||
ending_inline_pbm_stack: Vec<Au>,
|
||||
}
|
||||
|
||||
impl<'a> ContentSizesComputation<'a> {
|
||||
impl<'layout_data> ContentSizesComputation<'layout_data> {
|
||||
fn traverse(mut self, inline_formatting_context: &InlineFormattingContext) -> ContentSizes {
|
||||
for inline_item in inline_formatting_context.inline_items.iter() {
|
||||
self.process_item(&mut inline_item.borrow_mut(), inline_formatting_context);
|
||||
|
|
@ -2452,7 +2426,7 @@ impl<'a> ContentSizesComputation<'a> {
|
|||
/// Compute the [`ContentSizes`] of the given [`InlineFormattingContext`].
|
||||
fn compute(
|
||||
inline_formatting_context: &InlineFormattingContext,
|
||||
layout_context: &'a LayoutContext,
|
||||
layout_context: &'layout_data LayoutContext,
|
||||
containing_block_writing_mode: WritingMode,
|
||||
) -> ContentSizes {
|
||||
Self {
|
||||
|
|
|
|||
|
|
@ -27,7 +27,7 @@ use unicode_script::Script;
|
|||
use xi_unicode::linebreak_property;
|
||||
|
||||
use super::line_breaker::LineBreaker;
|
||||
use super::{FontKeyAndMetrics, InlineFormattingContextState};
|
||||
use super::{FontKeyAndMetrics, InlineFormattingContextLayout};
|
||||
use crate::fragment_tree::BaseFragmentInfo;
|
||||
|
||||
// These constants are the xi-unicode line breaking classes that are defined in
|
||||
|
|
@ -136,7 +136,7 @@ impl TextRunSegment {
|
|||
&self,
|
||||
text_run: &TextRun,
|
||||
mut soft_wrap_policy: SegmentStartSoftWrapPolicy,
|
||||
ifc: &mut InlineFormattingContextState,
|
||||
ifc: &mut InlineFormattingContextLayout,
|
||||
) {
|
||||
if self.break_at_start && soft_wrap_policy == SegmentStartSoftWrapPolicy::FollowLinebreaker
|
||||
{
|
||||
|
|
@ -492,7 +492,7 @@ impl TextRun {
|
|||
results
|
||||
}
|
||||
|
||||
pub(super) fn layout_into_line_items(&self, ifc: &mut InlineFormattingContextState) {
|
||||
pub(super) fn layout_into_line_items(&self, ifc: &mut InlineFormattingContextLayout) {
|
||||
if self.text_range.is_empty() {
|
||||
return;
|
||||
}
|
||||
|
|
|
|||
Loading…
Add table
Add a link
Reference in a new issue