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853 lines
38 KiB
Rust
853 lines
38 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 http://mozilla.org/MPL/2.0/. */
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//! CSS table formatting contexts.
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#![deny(unsafe_code)]
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use app_units::Au;
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use block::{BlockFlow, ISizeAndMarginsComputer};
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use context::LayoutContext;
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use cssparser::{Color, RGBA};
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use display_list_builder::{BlockFlowDisplayListBuilding, BorderPaintingMode, DisplayListBuildState};
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use euclid::Point2D;
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use flow::{self, EarlyAbsolutePositionInfo, Flow, FlowClass, ImmutableFlowUtils, OpaqueFlow};
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use flow_list::MutFlowListIterator;
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use fragment::{Fragment, FragmentBorderBoxIterator, Overflow};
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use gfx::display_list::StackingContext;
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use gfx_traits::StackingContextId;
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use gfx_traits::print_tree::PrintTree;
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use layout_debug;
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use model::MaybeAuto;
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use rustc_serialize::{Encodable, Encoder};
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use std::cmp::max;
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use std::fmt;
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use std::iter::{Enumerate, IntoIterator, Peekable};
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use std::sync::Arc;
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use style::computed_values::{border_collapse, border_spacing, border_top_style};
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use style::logical_geometry::{LogicalSize, PhysicalSide, WritingMode};
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use style::properties::{ComputedValues, ServoComputedValues};
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use style::servo::SharedStyleContext;
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use style::values::computed::LengthOrPercentageOrAuto;
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use table::{ColumnComputedInlineSize, ColumnIntrinsicInlineSize, InternalTable, VecExt};
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use table_cell::{CollapsedBordersForCell, TableCellFlow};
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/// A single row of a table.
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pub struct TableRowFlow {
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/// Fields common to all block flows.
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pub block_flow: BlockFlow,
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/// Information about the intrinsic inline-sizes of each cell.
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pub cell_intrinsic_inline_sizes: Vec<CellIntrinsicInlineSize>,
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/// Information about the computed inline-sizes of each column.
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pub column_computed_inline_sizes: Vec<ColumnComputedInlineSize>,
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/// The spacing for this row, propagated down from the table during the inline-size assignment
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/// phase.
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pub spacing: border_spacing::T,
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/// The direction of the columns, propagated down from the table during the inline-size
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/// assignment phase.
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pub table_writing_mode: WritingMode,
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/// Information about the borders for each cell that we bubble up to our parent. This is only
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/// computed if `border-collapse` is `collapse`.
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pub preliminary_collapsed_borders: CollapsedBordersForRow,
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/// Information about the borders for each cell, post-collapse. This is only computed if
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/// `border-collapse` is `collapse`.
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pub final_collapsed_borders: CollapsedBordersForRow,
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/// The computed cell spacing widths post-collapse.
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pub collapsed_border_spacing: CollapsedBorderSpacingForRow,
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}
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impl Encodable for TableRowFlow {
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fn encode<S: Encoder>(&self, e: &mut S) -> Result<(), S::Error> {
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self.block_flow.encode(e)
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}
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}
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/// Information about the column inline size and span for each cell.
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#[derive(RustcEncodable, Copy, Clone)]
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pub struct CellIntrinsicInlineSize {
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/// Inline sizes that this cell contributes to the column.
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pub column_size: ColumnIntrinsicInlineSize,
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/// The column span of this cell.
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pub column_span: u32,
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}
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impl TableRowFlow {
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pub fn from_fragment(fragment: Fragment) -> TableRowFlow {
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let writing_mode = fragment.style().writing_mode;
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TableRowFlow {
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block_flow: BlockFlow::from_fragment(fragment, None),
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cell_intrinsic_inline_sizes: Vec::new(),
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column_computed_inline_sizes: Vec::new(),
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spacing: border_spacing::T {
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horizontal: Au(0),
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vertical: Au(0),
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},
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table_writing_mode: writing_mode,
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preliminary_collapsed_borders: CollapsedBordersForRow::new(),
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final_collapsed_borders: CollapsedBordersForRow::new(),
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collapsed_border_spacing: CollapsedBorderSpacingForRow::new(),
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}
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}
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/// Assign block-size for table-row flow.
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///
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/// TODO(pcwalton): This doesn't handle floats and positioned elements right.
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///
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/// inline(always) because this is only ever called by in-order or non-in-order top-level
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/// methods
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#[inline(always)]
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fn assign_block_size_table_row_base(&mut self, layout_context: &LayoutContext) {
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// Per CSS 2.1 § 17.5.3, find max_y = max(computed `block-size`, minimum block-size of all
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// cells).
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let mut max_block_size = Au(0);
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let thread_id = self.block_flow.base.thread_id;
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for kid in self.block_flow.base.child_iter_mut() {
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kid.place_float_if_applicable();
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if !flow::base(kid).flags.is_float() {
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kid.assign_block_size_for_inorder_child_if_necessary(layout_context, thread_id);
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}
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{
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let child_fragment = kid.as_mut_table_cell().fragment();
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// TODO: Percentage block-size
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let child_specified_block_size =
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MaybeAuto::from_style(child_fragment.style().content_block_size(),
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Au(0)).specified_or_zero();
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max_block_size =
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max(max_block_size,
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child_specified_block_size +
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child_fragment.border_padding.block_start_end());
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}
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let child_node = flow::mut_base(kid);
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child_node.position.start.b = Au(0);
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max_block_size = max(max_block_size, child_node.position.size.block);
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}
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let mut block_size = max_block_size;
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// TODO: Percentage block-size
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block_size = match MaybeAuto::from_style(self.block_flow
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.fragment
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.style()
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.content_block_size(),
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Au(0)) {
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MaybeAuto::Auto => block_size,
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MaybeAuto::Specified(value) => max(value, block_size),
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};
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// Assign the block-size of own fragment
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let mut position = self.block_flow.fragment.border_box;
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position.size.block = block_size;
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self.block_flow.fragment.border_box = position;
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self.block_flow.base.position.size.block = block_size;
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// Assign the block-size of kid fragments, which is the same value as own block-size.
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for kid in self.block_flow.base.child_iter_mut() {
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let child_table_cell = kid.as_mut_table_cell();
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{
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let kid_fragment = child_table_cell.mut_fragment();
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let mut position = kid_fragment.border_box;
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position.size.block = block_size;
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kid_fragment.border_box = position;
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}
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// Assign the child's block size.
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child_table_cell.block_flow.base.position.size.block = block_size;
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// Write in the size of the relative containing block for children. (This information
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// is also needed to handle RTL.)
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child_table_cell.block_flow.base.early_absolute_position_info =
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EarlyAbsolutePositionInfo {
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relative_containing_block_size: self.block_flow.fragment.content_box().size,
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relative_containing_block_mode: self.block_flow.fragment.style().writing_mode,
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};
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}
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}
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pub fn populate_collapsed_border_spacing<'a, I>(
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&mut self,
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collapsed_inline_direction_border_widths_for_table: &[Au],
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collapsed_block_direction_border_widths_for_table: &mut Peekable<I>)
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where I: Iterator<Item=&'a Au> {
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self.collapsed_border_spacing.inline.clear();
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self.collapsed_border_spacing
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.inline
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.extend(collapsed_inline_direction_border_widths_for_table.into_iter().map(|x| *x));
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if let Some(collapsed_block_direction_border_width_for_table) =
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collapsed_block_direction_border_widths_for_table.next() {
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self.collapsed_border_spacing.block_start =
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*collapsed_block_direction_border_width_for_table
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}
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if let Some(collapsed_block_direction_border_width_for_table) =
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collapsed_block_direction_border_widths_for_table.peek() {
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self.collapsed_border_spacing.block_end =
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**collapsed_block_direction_border_width_for_table
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}
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}
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}
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impl Flow for TableRowFlow {
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fn class(&self) -> FlowClass {
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FlowClass::TableRow
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}
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fn as_mut_table_row(&mut self) -> &mut TableRowFlow {
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self
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}
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fn as_table_row(&self) -> &TableRowFlow {
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self
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}
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fn as_mut_block(&mut self) -> &mut BlockFlow {
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&mut self.block_flow
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}
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fn as_block(&self) -> &BlockFlow {
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&self.block_flow
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}
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fn column_intrinsic_inline_sizes(&mut self) -> &mut Vec<ColumnIntrinsicInlineSize> {
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panic!("can't call column_intrinsic_inline_sizes() on table row")
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}
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fn column_computed_inline_sizes(&mut self) -> &mut Vec<ColumnComputedInlineSize> {
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&mut self.column_computed_inline_sizes
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}
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/// Recursively (bottom-up) determines the context's preferred and minimum inline-sizes. When
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/// called on this context, all child contexts have had their min/pref inline-sizes set. This
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/// function must decide min/pref inline-sizes based on child context inline-sizes and
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/// dimensions of any fragments it is responsible for flowing.
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/// Min/pref inline-sizes set by this function are used in automatic table layout calculation.
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/// The specified column inline-sizes of children cells are used in fixed table layout
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/// calculation.
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fn bubble_inline_sizes(&mut self) {
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let _scope = layout_debug_scope!("table_row::bubble_inline_sizes {:x}",
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self.block_flow.base.debug_id());
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// Bubble up the specified inline-sizes from child table cells.
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let (mut min_inline_size, mut pref_inline_size) = (Au(0), Au(0));
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let collapsing_borders = self.block_flow
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.fragment
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.style()
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.get_inheritedtable()
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.border_collapse == border_collapse::T::collapse;
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// FIXME(pcwalton): Shouldn't use `CollapsedBorder::new()` here.
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self.preliminary_collapsed_borders.reset(CollapsedBorder::new());
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{
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let mut iterator = self.block_flow.base.child_iter_mut().enumerate().peekable();
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while let Some((i, kid)) = iterator.next() {
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assert!(kid.is_table_cell());
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// Collect the specified column inline-size of the cell. This is used in both
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// fixed and automatic table layout calculation.
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let child_specified_inline_size;
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let child_column_span;
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{
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let child_table_cell = kid.as_mut_table_cell();
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child_specified_inline_size = child_table_cell.block_flow
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.fragment
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.style
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.content_inline_size();
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child_column_span = child_table_cell.column_span;
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// Perform border collapse if necessary.
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if collapsing_borders {
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perform_inline_direction_border_collapse_for_row(
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i,
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child_table_cell,
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&mut iterator,
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&mut self.preliminary_collapsed_borders)
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}
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}
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// Collect minimum and preferred inline-sizes of the cell for automatic table layout
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// calculation.
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let child_base = flow::mut_base(kid);
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let child_column_inline_size = ColumnIntrinsicInlineSize {
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minimum_length: match child_specified_inline_size {
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LengthOrPercentageOrAuto::Auto |
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LengthOrPercentageOrAuto::Calc(_) |
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LengthOrPercentageOrAuto::Percentage(_) => {
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child_base.intrinsic_inline_sizes.minimum_inline_size
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}
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LengthOrPercentageOrAuto::Length(length) => length,
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},
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percentage: match child_specified_inline_size {
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LengthOrPercentageOrAuto::Auto |
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LengthOrPercentageOrAuto::Calc(_) |
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LengthOrPercentageOrAuto::Length(_) => 0.0,
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LengthOrPercentageOrAuto::Percentage(percentage) => percentage,
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},
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preferred: child_base.intrinsic_inline_sizes.preferred_inline_size,
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constrained: match child_specified_inline_size {
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LengthOrPercentageOrAuto::Length(_) => true,
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LengthOrPercentageOrAuto::Auto |
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LengthOrPercentageOrAuto::Calc(_) |
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LengthOrPercentageOrAuto::Percentage(_) => false,
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},
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};
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min_inline_size = min_inline_size + child_column_inline_size.minimum_length;
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pref_inline_size = pref_inline_size + child_column_inline_size.preferred;
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self.cell_intrinsic_inline_sizes.push(CellIntrinsicInlineSize {
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column_size: child_column_inline_size,
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column_span: child_column_span,
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});
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}
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}
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self.block_flow.base.intrinsic_inline_sizes.minimum_inline_size = min_inline_size;
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self.block_flow.base.intrinsic_inline_sizes.preferred_inline_size = max(min_inline_size,
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pref_inline_size);
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}
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fn assign_inline_sizes(&mut self, shared_context: &SharedStyleContext) {
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let _scope = layout_debug_scope!("table_row::assign_inline_sizes {:x}",
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self.block_flow.base.debug_id());
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debug!("assign_inline_sizes({}): assigning inline_size for flow", "table_row");
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// The position was set to the containing block by the flow's parent.
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let containing_block_inline_size = self.block_flow.base.block_container_inline_size;
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// FIXME: In case of border-collapse: collapse, inline_start_content_edge should be
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// border_inline_start.
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let inline_start_content_edge = Au(0);
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let inline_end_content_edge = Au(0);
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let inline_size_computer = InternalTable {
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border_collapse: self.block_flow.fragment.style.get_inheritedtable().border_collapse,
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};
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inline_size_computer.compute_used_inline_size(&mut self.block_flow,
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shared_context,
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containing_block_inline_size);
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// Spread out the completed inline sizes among columns with spans > 1.
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let mut computed_inline_size_for_cells = Vec::new();
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let mut column_computed_inline_size_iterator = self.column_computed_inline_sizes.iter();
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for cell_intrinsic_inline_size in &self.cell_intrinsic_inline_sizes {
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// Start with the computed inline size for the first column in the span.
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let mut column_computed_inline_size =
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match column_computed_inline_size_iterator.next() {
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Some(column_computed_inline_size) => *column_computed_inline_size,
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None => {
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// We're in fixed layout mode and there are more cells in this row than
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// columns we know about. According to CSS 2.1 § 17.5.2.1, the behavior is
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// now undefined. So just use zero.
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//
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// FIXME(pcwalton): $10 says this isn't Web compatible.
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ColumnComputedInlineSize {
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size: Au(0),
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}
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}
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};
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// Add in computed inline sizes for any extra columns in the span.
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for _ in 1..cell_intrinsic_inline_size.column_span {
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let extra_column_computed_inline_size =
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match column_computed_inline_size_iterator.next() {
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Some(column_computed_inline_size) => column_computed_inline_size,
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None => break,
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};
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column_computed_inline_size.size = column_computed_inline_size.size +
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extra_column_computed_inline_size.size + self.spacing.horizontal;
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}
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computed_inline_size_for_cells.push(column_computed_inline_size)
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}
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// Set up border collapse info.
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let border_collapse_info =
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match self.block_flow.fragment.style().get_inheritedtable().border_collapse {
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border_collapse::T::collapse => {
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Some(BorderCollapseInfoForChildTableCell {
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collapsed_borders_for_row: &self.final_collapsed_borders,
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collapsed_border_spacing_for_row: &self.collapsed_border_spacing,
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})
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}
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border_collapse::T::separate => None,
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};
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// Push those inline sizes down to the cells.
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let spacing = self.spacing;
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let row_writing_mode = self.block_flow.base.writing_mode;
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let table_writing_mode = self.table_writing_mode;
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self.block_flow.propagate_assigned_inline_size_to_children(shared_context,
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inline_start_content_edge,
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inline_end_content_edge,
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containing_block_inline_size,
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|child_flow,
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child_index,
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content_inline_size,
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_writing_mode,
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inline_start_margin_edge,
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inline_end_margin_edge| {
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set_inline_position_of_child_flow(
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child_flow,
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child_index,
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row_writing_mode,
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table_writing_mode,
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&computed_inline_size_for_cells,
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&spacing,
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&border_collapse_info,
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content_inline_size,
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inline_start_margin_edge,
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inline_end_margin_edge);
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})
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}
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fn assign_block_size(&mut self, layout_context: &LayoutContext) {
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debug!("assign_block_size: assigning block_size for table_row");
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self.assign_block_size_table_row_base(layout_context);
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}
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fn compute_absolute_position(&mut self, layout_context: &LayoutContext) {
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self.block_flow.compute_absolute_position(layout_context)
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}
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fn update_late_computed_inline_position_if_necessary(&mut self, inline_position: Au) {
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self.block_flow.update_late_computed_inline_position_if_necessary(inline_position)
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}
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fn update_late_computed_block_position_if_necessary(&mut self, block_position: Au) {
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self.block_flow.update_late_computed_block_position_if_necessary(block_position)
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}
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fn build_display_list(&mut self, state: &mut DisplayListBuildState) {
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let border_painting_mode = match self.block_flow
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.fragment
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.style
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.get_inheritedtable()
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.border_collapse {
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border_collapse::T::separate => BorderPaintingMode::Separate,
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border_collapse::T::collapse => BorderPaintingMode::Hidden,
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};
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self.block_flow.build_display_list_for_block(state, border_painting_mode);
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}
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fn collect_stacking_contexts(&mut self,
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parent_id: StackingContextId,
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contexts: &mut Vec<Box<StackingContext>>)
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-> StackingContextId {
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self.block_flow.collect_stacking_contexts(parent_id, contexts)
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}
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fn repair_style(&mut self, new_style: &Arc<ServoComputedValues>) {
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self.block_flow.repair_style(new_style)
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}
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fn compute_overflow(&self) -> Overflow {
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self.block_flow.compute_overflow()
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}
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fn generated_containing_block_size(&self, flow: OpaqueFlow) -> LogicalSize<Au> {
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self.block_flow.generated_containing_block_size(flow)
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}
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fn iterate_through_fragment_border_boxes(&self,
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iterator: &mut FragmentBorderBoxIterator,
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level: i32,
|
|
stacking_context_position: &Point2D<Au>) {
|
|
self.block_flow.iterate_through_fragment_border_boxes(iterator, level, stacking_context_position)
|
|
}
|
|
|
|
fn mutate_fragments(&mut self, mutator: &mut FnMut(&mut Fragment)) {
|
|
self.block_flow.mutate_fragments(mutator)
|
|
}
|
|
|
|
fn print_extra_flow_children(&self, print_tree: &mut PrintTree) {
|
|
self.block_flow.print_extra_flow_children(print_tree);
|
|
}
|
|
}
|
|
|
|
impl fmt::Debug for TableRowFlow {
|
|
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
|
|
write!(f, "TableRowFlow: {:?}", self.block_flow)
|
|
}
|
|
}
|
|
|
|
#[derive(Clone, Debug)]
|
|
pub struct CollapsedBordersForRow {
|
|
/// The size of this vector should be equal to the number of cells plus one.
|
|
pub inline: Vec<CollapsedBorder>,
|
|
/// The size of this vector should be equal to the number of cells.
|
|
pub block_start: Vec<CollapsedBorder>,
|
|
/// The size of this vector should be equal to the number of cells.
|
|
pub block_end: Vec<CollapsedBorder>,
|
|
}
|
|
|
|
impl CollapsedBordersForRow {
|
|
pub fn new() -> CollapsedBordersForRow {
|
|
CollapsedBordersForRow {
|
|
inline: Vec::new(),
|
|
block_start: Vec::new(),
|
|
block_end: Vec::new(),
|
|
}
|
|
}
|
|
|
|
pub fn reset(&mut self, first_inline_border: CollapsedBorder) {
|
|
self.inline.clear();
|
|
self.inline.push(first_inline_border);
|
|
self.block_start.clear();
|
|
self.block_end.clear()
|
|
}
|
|
}
|
|
|
|
#[derive(Clone, Debug)]
|
|
pub struct CollapsedBorderSpacingForRow {
|
|
/// The spacing in between each column.
|
|
inline: Vec<Au>,
|
|
/// The spacing above this row.
|
|
pub block_start: Au,
|
|
/// The spacing below this row.
|
|
block_end: Au,
|
|
}
|
|
|
|
impl CollapsedBorderSpacingForRow {
|
|
fn new() -> CollapsedBorderSpacingForRow {
|
|
CollapsedBorderSpacingForRow {
|
|
inline: Vec::new(),
|
|
block_start: Au(0),
|
|
block_end: Au(0),
|
|
}
|
|
}
|
|
}
|
|
|
|
/// All aspects of a border that can collapse with adjacent borders. See CSS 2.1 § 17.6.2.1.
|
|
#[derive(Copy, Clone, Debug)]
|
|
pub struct CollapsedBorder {
|
|
/// The style of the border.
|
|
pub style: border_top_style::T,
|
|
/// The width of the border.
|
|
pub width: Au,
|
|
/// The color of the border.
|
|
pub color: Color,
|
|
/// The type of item that this border comes from.
|
|
pub provenance: CollapsedBorderProvenance,
|
|
}
|
|
|
|
impl Encodable for CollapsedBorder {
|
|
fn encode<S: Encoder>(&self, _: &mut S) -> Result<(), S::Error> {
|
|
Ok(())
|
|
}
|
|
}
|
|
|
|
/// Where a border style comes from.
|
|
///
|
|
/// The integer values here correspond to the border conflict resolution rules in CSS 2.1 §
|
|
/// 17.6.2.1. Higher values override lower values.
|
|
// FIXME(#8586): FromTableRow, FromTableRowGroup, FromTableColumn,
|
|
// FromTableColumnGroup are unused
|
|
#[allow(dead_code)]
|
|
#[derive(Copy, Clone, Debug, PartialEq, RustcEncodable)]
|
|
pub enum CollapsedBorderProvenance {
|
|
FromPreviousTableCell = 6,
|
|
FromNextTableCell = 5,
|
|
FromTableRow = 4,
|
|
FromTableRowGroup = 3,
|
|
FromTableColumn = 2,
|
|
FromTableColumnGroup = 1,
|
|
FromTable = 0,
|
|
}
|
|
|
|
impl CollapsedBorder {
|
|
/// Creates a collapsible border style for no border.
|
|
pub fn new() -> CollapsedBorder {
|
|
CollapsedBorder {
|
|
style: border_top_style::T::none,
|
|
width: Au(0),
|
|
color: Color::RGBA(RGBA {
|
|
red: 0.0,
|
|
green: 0.0,
|
|
blue: 0.0,
|
|
alpha: 0.0,
|
|
}),
|
|
provenance: CollapsedBorderProvenance::FromTable,
|
|
}
|
|
}
|
|
|
|
/// Creates a collapsed border from the block-start border described in the given CSS style
|
|
/// object.
|
|
fn top(css_style: &ServoComputedValues, provenance: CollapsedBorderProvenance)
|
|
-> CollapsedBorder {
|
|
CollapsedBorder {
|
|
style: css_style.get_border().border_top_style,
|
|
width: css_style.get_border().border_top_width,
|
|
color: css_style.get_border().border_top_color,
|
|
provenance: provenance,
|
|
}
|
|
}
|
|
|
|
/// Creates a collapsed border style from the right border described in the given CSS style
|
|
/// object.
|
|
fn right(css_style: &ServoComputedValues, provenance: CollapsedBorderProvenance)
|
|
-> CollapsedBorder {
|
|
CollapsedBorder {
|
|
style: css_style.get_border().border_right_style,
|
|
width: css_style.get_border().border_right_width,
|
|
color: css_style.get_border().border_right_color,
|
|
provenance: provenance,
|
|
}
|
|
}
|
|
|
|
/// Creates a collapsed border style from the bottom border described in the given CSS style
|
|
/// object.
|
|
fn bottom(css_style: &ServoComputedValues, provenance: CollapsedBorderProvenance)
|
|
-> CollapsedBorder {
|
|
CollapsedBorder {
|
|
style: css_style.get_border().border_bottom_style,
|
|
width: css_style.get_border().border_bottom_width,
|
|
color: css_style.get_border().border_bottom_color,
|
|
provenance: provenance,
|
|
}
|
|
}
|
|
|
|
/// Creates a collapsed border style from the left border described in the given CSS style
|
|
/// object.
|
|
fn left(css_style: &ServoComputedValues, provenance: CollapsedBorderProvenance)
|
|
-> CollapsedBorder {
|
|
CollapsedBorder {
|
|
style: css_style.get_border().border_left_style,
|
|
width: css_style.get_border().border_left_width,
|
|
color: css_style.get_border().border_left_color,
|
|
provenance: provenance,
|
|
}
|
|
}
|
|
|
|
/// Creates a collapsed border style from the given physical side.
|
|
fn from_side(side: PhysicalSide,
|
|
css_style: &ServoComputedValues,
|
|
provenance: CollapsedBorderProvenance)
|
|
-> CollapsedBorder {
|
|
match side {
|
|
PhysicalSide::Top => CollapsedBorder::top(css_style, provenance),
|
|
PhysicalSide::Right => CollapsedBorder::right(css_style, provenance),
|
|
PhysicalSide::Bottom => CollapsedBorder::bottom(css_style, provenance),
|
|
PhysicalSide::Left => CollapsedBorder::left(css_style, provenance),
|
|
}
|
|
}
|
|
|
|
/// Creates a collapsed border style from the inline-start border described in the given CSS
|
|
/// style object.
|
|
pub fn inline_start(css_style: &ServoComputedValues, provenance: CollapsedBorderProvenance)
|
|
-> CollapsedBorder {
|
|
CollapsedBorder::from_side(css_style.writing_mode.inline_start_physical_side(),
|
|
css_style,
|
|
provenance)
|
|
}
|
|
|
|
/// Creates a collapsed border style from the inline-start border described in the given CSS
|
|
/// style object.
|
|
pub fn inline_end(css_style: &ServoComputedValues, provenance: CollapsedBorderProvenance)
|
|
-> CollapsedBorder {
|
|
CollapsedBorder::from_side(css_style.writing_mode.inline_end_physical_side(),
|
|
css_style,
|
|
provenance)
|
|
}
|
|
|
|
/// Creates a collapsed border style from the block-start border described in the given CSS
|
|
/// style object.
|
|
pub fn block_start(css_style: &ServoComputedValues, provenance: CollapsedBorderProvenance)
|
|
-> CollapsedBorder {
|
|
CollapsedBorder::from_side(css_style.writing_mode.block_start_physical_side(),
|
|
css_style,
|
|
provenance)
|
|
}
|
|
|
|
/// Creates a collapsed border style from the block-end border described in the given CSS style
|
|
/// object.
|
|
pub fn block_end(css_style: &ServoComputedValues, provenance: CollapsedBorderProvenance)
|
|
-> CollapsedBorder {
|
|
CollapsedBorder::from_side(css_style.writing_mode.block_end_physical_side(),
|
|
css_style,
|
|
provenance)
|
|
}
|
|
|
|
/// If `other` has a higher priority per CSS 2.1 § 17.6.2.1, replaces `self` with it.
|
|
pub fn combine(&mut self, other: &CollapsedBorder) {
|
|
match (self.style, other.style) {
|
|
// Step 1.
|
|
(border_top_style::T::hidden, _) => {}
|
|
(_, border_top_style::T::hidden) => *self = *other,
|
|
// Step 2.
|
|
(border_top_style::T::none, _) => *self = *other,
|
|
(_, border_top_style::T::none) => {}
|
|
// Step 3.
|
|
_ if self.width > other.width => {}
|
|
_ if self.width < other.width => *self = *other,
|
|
(this_style, other_style) if this_style > other_style => {}
|
|
(this_style, other_style) if this_style < other_style => *self = *other,
|
|
// Step 4.
|
|
_ if (self.provenance as i8) >= other.provenance as i8 => {}
|
|
_ => *self = *other,
|
|
}
|
|
}
|
|
}
|
|
|
|
/// Pushes column inline size and border collapse info down to a child.
|
|
pub fn propagate_column_inline_sizes_to_child(
|
|
child_flow: &mut Flow,
|
|
table_writing_mode: WritingMode,
|
|
column_computed_inline_sizes: &[ColumnComputedInlineSize],
|
|
border_spacing: &border_spacing::T) {
|
|
// If the child is a row group or a row, the column inline-size info should be copied from its
|
|
// parent.
|
|
//
|
|
// FIXME(pcwalton): This seems inefficient. Reference count it instead?
|
|
match child_flow.class() {
|
|
FlowClass::Table => {
|
|
let child_table_flow = child_flow.as_mut_table();
|
|
child_table_flow.column_computed_inline_sizes = column_computed_inline_sizes.to_vec();
|
|
}
|
|
FlowClass::TableRowGroup => {
|
|
let child_table_rowgroup_flow = child_flow.as_mut_table_rowgroup();
|
|
child_table_rowgroup_flow.column_computed_inline_sizes =
|
|
column_computed_inline_sizes.to_vec();
|
|
child_table_rowgroup_flow.spacing = *border_spacing;
|
|
child_table_rowgroup_flow.table_writing_mode = table_writing_mode;
|
|
}
|
|
FlowClass::TableRow => {
|
|
let child_table_row_flow = child_flow.as_mut_table_row();
|
|
child_table_row_flow.column_computed_inline_sizes =
|
|
column_computed_inline_sizes.to_vec();
|
|
child_table_row_flow.spacing = *border_spacing;
|
|
child_table_row_flow.table_writing_mode = table_writing_mode;
|
|
}
|
|
c => warn!("unexpected flow in table {:?}", c)
|
|
}
|
|
}
|
|
|
|
/// Lay out table cells inline according to the computer column sizes.
|
|
fn set_inline_position_of_child_flow(
|
|
child_flow: &mut Flow,
|
|
child_index: usize,
|
|
row_writing_mode: WritingMode,
|
|
table_writing_mode: WritingMode,
|
|
column_computed_inline_sizes: &[ColumnComputedInlineSize],
|
|
border_spacing: &border_spacing::T,
|
|
border_collapse_info: &Option<BorderCollapseInfoForChildTableCell>,
|
|
parent_content_inline_size: Au,
|
|
inline_start_margin_edge: &mut Au,
|
|
inline_end_margin_edge: &mut Au) {
|
|
if !child_flow.is_table_cell() {
|
|
return
|
|
}
|
|
|
|
let reverse_column_order = table_writing_mode.is_bidi_ltr() != row_writing_mode.is_bidi_ltr();
|
|
|
|
// Handle border collapsing, if necessary.
|
|
let child_table_cell = child_flow.as_mut_table_cell();
|
|
match *border_collapse_info {
|
|
Some(ref border_collapse_info) => {
|
|
// Write in the child's border collapse state.
|
|
child_table_cell.collapsed_borders = CollapsedBordersForCell {
|
|
inline_start_border: border_collapse_info.collapsed_borders_for_row
|
|
.inline
|
|
.get(child_index)
|
|
.map_or(CollapsedBorder::new(), |x| *x),
|
|
inline_end_border: border_collapse_info.collapsed_borders_for_row
|
|
.inline
|
|
.get(child_index + 1)
|
|
.map_or(CollapsedBorder::new(), |x| *x),
|
|
block_start_border: border_collapse_info.collapsed_borders_for_row
|
|
.block_start
|
|
.get(child_index)
|
|
.map_or(CollapsedBorder::new(), |x| *x),
|
|
block_end_border: border_collapse_info.collapsed_borders_for_row
|
|
.block_end
|
|
.get(child_index)
|
|
.map_or(CollapsedBorder::new(), |x| *x),
|
|
inline_start_width: border_collapse_info.collapsed_border_spacing_for_row
|
|
.inline
|
|
.get(child_index)
|
|
.map_or(Au(0), |x| *x),
|
|
inline_end_width: border_collapse_info.collapsed_border_spacing_for_row
|
|
.inline
|
|
.get(child_index + 1)
|
|
.map_or(Au(0), |x| *x),
|
|
block_start_width: border_collapse_info.collapsed_border_spacing_for_row
|
|
.block_start,
|
|
block_end_width: border_collapse_info.collapsed_border_spacing_for_row.block_end,
|
|
};
|
|
|
|
// Move over past the collapsed border.
|
|
if reverse_column_order {
|
|
*inline_end_margin_edge = *inline_end_margin_edge +
|
|
child_table_cell.collapsed_borders.inline_start_width
|
|
} else {
|
|
*inline_start_margin_edge = *inline_start_margin_edge +
|
|
child_table_cell.collapsed_borders.inline_start_width
|
|
}
|
|
}
|
|
None => {
|
|
// Take spacing into account.
|
|
if reverse_column_order {
|
|
*inline_end_margin_edge = *inline_end_margin_edge + border_spacing.horizontal
|
|
} else {
|
|
*inline_start_margin_edge = *inline_start_margin_edge + border_spacing.horizontal
|
|
}
|
|
}
|
|
}
|
|
|
|
let column_inline_size = column_computed_inline_sizes[child_index].size;
|
|
let kid_base = &mut child_table_cell.block_flow.base;
|
|
kid_base.block_container_inline_size = column_inline_size;
|
|
|
|
if reverse_column_order {
|
|
// Columns begin from the inline-end edge.
|
|
kid_base.position.start.i =
|
|
parent_content_inline_size - *inline_end_margin_edge - column_inline_size;
|
|
*inline_end_margin_edge = *inline_end_margin_edge + column_inline_size;
|
|
} else {
|
|
// Columns begin from the inline-start edge.
|
|
kid_base.position.start.i = *inline_start_margin_edge;
|
|
*inline_start_margin_edge = *inline_start_margin_edge + column_inline_size;
|
|
}
|
|
}
|
|
|
|
#[derive(Copy, Clone)]
|
|
pub struct BorderCollapseInfoForChildTableCell<'a> {
|
|
collapsed_borders_for_row: &'a CollapsedBordersForRow,
|
|
collapsed_border_spacing_for_row: &'a CollapsedBorderSpacingForRow,
|
|
}
|
|
|
|
/// Performs border-collapse in the inline direction for all the cells' inside borders in the
|
|
/// inline-direction cells and propagates the outside borders (the far left and right) up to the
|
|
/// table row. This is done eagerly here so that at least the inline inside border collapse
|
|
/// computations can be parallelized across all the rows of the table.
|
|
fn perform_inline_direction_border_collapse_for_row(
|
|
child_index: usize,
|
|
child_table_cell: &mut TableCellFlow,
|
|
iterator: &mut Peekable<Enumerate<MutFlowListIterator>>,
|
|
preliminary_collapsed_borders: &mut CollapsedBordersForRow) {
|
|
let inline_collapsed_border = preliminary_collapsed_borders.inline.push_or_set(
|
|
child_index + 1,
|
|
CollapsedBorder::inline_end(&*child_table_cell.block_flow.fragment.style,
|
|
CollapsedBorderProvenance::FromPreviousTableCell));
|
|
|
|
if let Some(&(_, ref next_child_flow)) = iterator.peek() {
|
|
let next_child_flow = next_child_flow.as_block();
|
|
inline_collapsed_border.combine(
|
|
&CollapsedBorder::inline_start(&*next_child_flow.fragment.style,
|
|
CollapsedBorderProvenance::FromNextTableCell))
|
|
};
|
|
|
|
let block_start_border =
|
|
CollapsedBorder::block_start(&*child_table_cell.block_flow.fragment.style,
|
|
CollapsedBorderProvenance::FromNextTableCell);
|
|
preliminary_collapsed_borders.block_start.push_or_set(child_index, block_start_border);
|
|
let block_end_border =
|
|
CollapsedBorder::block_end(&*child_table_cell.block_flow.fragment.style,
|
|
CollapsedBorderProvenance::FromPreviousTableCell);
|
|
preliminary_collapsed_borders.block_end.push_or_set(child_index, block_end_border);
|
|
}
|