mirror of
https://github.com/servo/servo.git
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187 lines
7.3 KiB
Rust
187 lines
7.3 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_blocks)]
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use block::{BlockFlow, ISizeAndMarginsComputer, MarginsMayCollapseFlag};
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use context::LayoutContext;
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use flow::{Flow, FlowClass};
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use fragment::{Fragment, FragmentBorderBoxIterator};
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use model::{MaybeAuto};
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use layout_debug;
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use table::InternalTable;
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use wrapper::ThreadSafeLayoutNode;
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use geom::{Point2D, Rect};
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use servo_util::geometry::Au;
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use servo_util::logical_geometry::LogicalRect;
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use std::fmt;
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use style::properties::ComputedValues;
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use style::legacy::UnsignedIntegerAttribute;
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use std::sync::Arc;
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/// A table formatting context.
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#[derive(RustcEncodable)]
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pub struct TableCellFlow {
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/// Data common to all block flows.
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pub block_flow: BlockFlow,
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/// The column span of this cell.
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pub column_span: u32,
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/// Whether this cell is visible. If false, the value of `empty-cells` means that we must not
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/// display this cell.
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pub visible: bool,
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}
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impl TableCellFlow {
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pub fn from_node_fragment_and_visibility_flag(node: &ThreadSafeLayoutNode,
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fragment: Fragment,
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visible: bool)
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-> TableCellFlow {
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TableCellFlow {
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block_flow: BlockFlow::from_node_and_fragment(node, fragment),
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column_span: node.get_unsigned_integer_attribute(UnsignedIntegerAttribute::ColSpan)
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.unwrap_or(1),
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visible: visible,
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}
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}
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pub fn fragment<'a>(&'a mut self) -> &'a Fragment {
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&self.block_flow.fragment
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}
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pub fn mut_fragment<'a>(&'a mut self) -> &'a mut Fragment {
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&mut self.block_flow.fragment
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}
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/// Assign block-size for table-cell flow.
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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_cell_base<'a>(&mut self, layout_context: &'a LayoutContext<'a>) {
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self.block_flow.assign_block_size_block_base(
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layout_context,
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MarginsMayCollapseFlag::MarginsMayNotCollapse)
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}
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}
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impl Flow for TableCellFlow {
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fn class(&self) -> FlowClass {
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FlowClass::TableCell
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}
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fn as_table_cell<'a>(&'a mut self) -> &'a mut TableCellFlow {
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self
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}
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fn as_immutable_table_cell<'a>(&'a self) -> &'a TableCellFlow {
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self
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}
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fn as_block<'a>(&'a mut self) -> &'a mut BlockFlow {
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&mut self.block_flow
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}
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/// Minimum/preferred inline-sizes set by this function are used in automatic 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_cell::bubble_inline_sizes {:x}",
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self.block_flow.base.debug_id());
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self.block_flow.bubble_inline_sizes();
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let specified_inline_size = MaybeAuto::from_style(self.block_flow
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.fragment
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.style()
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.content_inline_size(),
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Au(0)).specified_or_zero();
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if self.block_flow.base.intrinsic_inline_sizes.minimum_inline_size <
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specified_inline_size {
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self.block_flow.base.intrinsic_inline_sizes.minimum_inline_size = specified_inline_size
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}
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if self.block_flow.base.intrinsic_inline_sizes.preferred_inline_size <
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self.block_flow.base.intrinsic_inline_sizes.minimum_inline_size {
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self.block_flow.base.intrinsic_inline_sizes.preferred_inline_size =
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self.block_flow.base.intrinsic_inline_sizes.minimum_inline_size;
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}
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}
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/// Recursively (top-down) determines the actual inline-size of child contexts and fragments.
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/// When called on this context, the context has had its inline-size set by the parent table
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/// row.
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fn assign_inline_sizes(&mut self, layout_context: &LayoutContext) {
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let _scope = layout_debug_scope!("table_cell::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_cell");
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// The position was set to the column inline-size by the parent flow, table row flow.
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let containing_block_inline_size = self.block_flow.base.block_container_inline_size;
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let inline_size_computer = InternalTable;
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inline_size_computer.compute_used_inline_size(&mut self.block_flow,
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layout_context,
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containing_block_inline_size);
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let inline_start_content_edge =
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self.block_flow.fragment.border_box.start.i +
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self.block_flow.fragment.border_padding.inline_start;
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let padding_and_borders = self.block_flow.fragment.border_padding.inline_start_end();
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let content_inline_size =
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self.block_flow.fragment.border_box.size.inline - padding_and_borders;
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self.block_flow.propagate_assigned_inline_size_to_children(layout_context,
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inline_start_content_edge,
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content_inline_size,
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None);
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}
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fn assign_block_size<'a>(&mut self, ctx: &'a LayoutContext<'a>) {
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debug!("assign_block_size: assigning block_size for table_cell");
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self.assign_block_size_table_cell_base(ctx);
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}
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fn compute_absolute_position(&mut self) {
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self.block_flow.compute_absolute_position()
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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, layout_context: &LayoutContext) {
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if self.visible {
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self.block_flow.build_display_list(layout_context)
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}
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}
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fn repair_style(&mut self, new_style: &Arc<ComputedValues>) {
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self.block_flow.repair_style(new_style)
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}
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fn compute_overflow(&self) -> Rect<Au> {
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self.block_flow.compute_overflow()
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}
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fn generated_containing_block_rect(&self) -> LogicalRect<Au> {
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self.block_flow.generated_containing_block_rect()
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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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stacking_context_position: &Point2D<Au>) {
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self.block_flow.iterate_through_fragment_border_boxes(iterator, stacking_context_position)
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}
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}
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impl fmt::Debug for TableCellFlow {
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fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
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write!(f, "TableCellFlow: {:?}", self.block_flow)
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}
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}
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