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layout: Implement border-spacing per CSS 2.1 § 17.6.1 and the legacy

Browse source 
`cellspacing` attribute per HTML5 § 14.3.9.

Table layout code has been refactored to push the spacing down to
rowgroups and rows; this will aid the implementation of
`border-collapse` as well.

This commit also fixes two nasty issues in table layout:

* In fixed layout, extra space would not be divided among columns that
  had auto width but had nonzero minimum width.

* In automatic layout, extra space would be distributed to constrained
  columns as well even if unconstrained columns with percentage equal to
  zero were present.
This commit is contained in:
Patrick Walton 2014-12-17 16:44:37 -08:00
parent e8f1a046c6
commit 586c12ccc4
26 changed files with 690 additions and 208 deletions
Download patch file Download diff file Expand all files Collapse all files

78
components/layout/block.rs
View file

@ -44,7 +44,7 @@ use incremental::{REFLOW, REFLOW_OUT_OF_FLOW};
use layout_debug;
use model::{IntrinsicISizes, MarginCollapseInfo};
use model::{MaybeAuto, CollapsibleMargins, specified, specified_or_none};
use table::ColumnComputedInlineSize;
use table;
use wrapper::ThreadSafeLayoutNode;
use geom::{Point2D, Rect, Size2D};
@ -53,13 +53,13 @@ use msg::compositor_msg::LayerId;
use rustc_serialize::{Encoder, Encodable};
use std::cmp::{max, min};
use std::fmt;
use std::sync::Arc;
use style::computed_values::{overflow_x, overflow_y, position, box_sizing, display, float};
use style::properties::ComputedValues;
use style::values::computed::{LengthOrPercentage, LengthOrPercentageOrAuto};
use style::values::computed::{LengthOrPercentageOrNone};
use std::sync::Arc;
use util::geometry::{Au, MAX_AU};
use util::logical_geometry::{LogicalPoint, LogicalRect, LogicalSize, WritingMode};
use util::logical_geometry::{LogicalPoint, LogicalRect, LogicalSize};
use util::opts;
/// Information specific to floated blocks.
@ -302,11 +302,11 @@ impl BSizeConstraintSolution {
/// current calculated value of `height`.
///
/// See CSS 2.1 § 10.7.
struct CandidateBSizeIterator {
pub struct CandidateBSizeIterator {
block_size: MaybeAuto,
max_block_size: Option<Au>,
min_block_size: Au,
candidate_value: Au,
pub candidate_value: Au,
status: CandidateBSizeIteratorStatus,
}
@ -510,7 +510,7 @@ enum FormattingContextType {
//
// TODO(#1244, #2007, pcwalton): Do this for CSS transforms and opacity too, at least if they're
// animating.
fn propagate_layer_flag_from_child(layers_needed_for_descendants: &mut bool, kid: &mut Flow) {
pub fn propagate_layer_flag_from_child(layers_needed_for_descendants: &mut bool, kid: &mut Flow) {
if kid.is_absolute_containing_block() {
let kid_base = flow::mut_base(kid);
if kid_base.flags.contains(NEEDS_LAYER) {
@ -1234,7 +1234,7 @@ impl BlockFlow {
layout_context: &LayoutContext,
inline_start_content_edge: Au,
content_inline_size: Au,
optional_column_computed_inline_sizes: Option<&[ColumnComputedInlineSize]>) {
table_info: Option<table::ChildInlineSizeInfo>) {
// Keep track of whether floats could impact each child.
let mut inline_start_floats_impact_child =
self.base.flags.contains(IMPACTED_BY_LEFT_FLOATS);
@ -1256,9 +1256,6 @@ impl BlockFlow {
let fixed_static_i_offset = self.base.fixed_static_i_offset + inline_start_content_edge;
let flags = self.base.flags.clone();
// This value is used only for table cells.
let mut inline_start_margin_edge = inline_start_content_edge;
// Remember the inline-sizes of the last left and right floats, if there were any. These
// are used for estimating the inline-sizes of block formatting contexts. (We estimate that
// the inline-size of any block formatting context that we see will be based on the
@ -1286,7 +1283,8 @@ impl BlockFlow {
(LengthOrPercentageOrAuto::Percentage(percent), Some(container_size)) => {
Some(container_size.scale_by(percent))
}
(LengthOrPercentageOrAuto::Percentage(_), None) | (LengthOrPercentageOrAuto::Auto, _) => None,
(LengthOrPercentageOrAuto::Percentage(_), None) |
(LengthOrPercentageOrAuto::Auto, _) => None,
(LengthOrPercentageOrAuto::Length(length), _) => Some(length),
};
@ -1299,6 +1297,13 @@ impl BlockFlow {
// FIXME (mbrubeck): Get correct mode for absolute containing block
let containing_block_mode = self.base.writing_mode;
// This value is used only for table cells.
let mut inline_start_margin_edge = if table_info.is_some() {
inline_start_content_edge
} else {
Au(0)
};
for (i, kid) in self.base.child_iter().enumerate() {
{
let kid_base = flow::mut_base(kid);
@ -1376,16 +1381,12 @@ impl BlockFlow {
}
// Handle tables.
match optional_column_computed_inline_sizes {
Some(ref column_computed_inline_sizes) => {
propagate_column_inline_sizes_to_child(kid,
i,
content_inline_size,
containing_block_mode,
*column_computed_inline_sizes,
&mut inline_start_margin_edge)
}
None => {}
if let Some(ref table_info) = table_info {
table_info.propagate_to_child(kid,
i,
content_inline_size,
containing_block_mode,
&mut inline_start_margin_edge);
}
// Per CSS 2.1 § 16.3.1, text alignment propagates to all children in flow.
@ -2661,38 +2662,3 @@ impl ISizeAndMarginsComputer for FloatReplaced {
}
}
fn propagate_column_inline_sizes_to_child(
kid: &mut Flow,
child_index: uint,
content_inline_size: Au,
writing_mode: WritingMode,
column_computed_inline_sizes: &[ColumnComputedInlineSize],
inline_start_margin_edge: &mut Au) {
// If kid is table_rowgroup or table_row, the column inline-sizes info should be copied from
// its parent.
//
// FIXME(pcwalton): This seems inefficient. Reference count it instead?
let inline_size = if kid.is_table() || kid.is_table_rowgroup() || kid.is_table_row() {
*kid.column_computed_inline_sizes() =
column_computed_inline_sizes.iter().map(|&x| x).collect();
// ISize of kid flow is our content inline-size.
content_inline_size
} else if kid.is_table_cell() {
column_computed_inline_sizes[child_index].size
} else {
// ISize of kid flow is our content inline-size.
content_inline_size
};
{
let kid_base = flow::mut_base(kid);
kid_base.position.start.i = *inline_start_margin_edge;
kid_base.block_container_inline_size = inline_size;
kid_base.block_container_writing_mode = writing_mode;
}
if kid.is_table_cell() {
*inline_start_margin_edge = *inline_start_margin_edge + inline_size
}
}

3
components/layout/fragment.rs
View file

@ -886,7 +886,8 @@ impl Fragment {
SpecificFragmentInfo::InlineBlock(_) => {
QuantitiesIncludedInIntrinsicInlineSizes::all()
}
SpecificFragmentInfo::Table | SpecificFragmentInfo::TableCell => {
SpecificFragmentInfo::Table |
SpecificFragmentInfo::TableCell => {
INTRINSIC_INLINE_SIZE_INCLUDES_PADDING |
INTRINSIC_INLINE_SIZE_INCLUDES_BORDER |
INTRINSIC_INLINE_SIZE_INCLUDES_SPECIFIED

237
components/layout/table.rs
View file

@ -6,29 +6,30 @@
#![deny(unsafe_blocks)]
use block::{BlockFlow, ISizeAndMarginsComputer, MarginsMayCollapseFlag};
use block::{self, BlockFlow, CandidateBSizeIterator, ISizeAndMarginsComputer};
use block::{ISizeConstraintInput, ISizeConstraintSolution};
use context::LayoutContext;
use floats::FloatKind;
use flow::{self, Flow, FlowClass, IMPACTED_BY_LEFT_FLOATS, IMPACTED_BY_RIGHT_FLOATS};
use flow::ImmutableFlowUtils;
use flow::{ImmutableFlowUtils, MutableFlowUtils};
use fragment::{Fragment, FragmentBorderBoxIterator};
use incremental::{REFLOW, REFLOW_OUT_OF_FLOW};
use layout_debug;
use model::{IntrinsicISizes, IntrinsicISizesContribution};
use model::{IntrinsicISizes, IntrinsicISizesContribution, MaybeAuto};
use table_row::CellIntrinsicInlineSize;
use table_wrapper::TableLayout;
use wrapper::ThreadSafeLayoutNode;
use geom::{Point2D, Rect};
use util::geometry::Au;
use util::logical_geometry::LogicalRect;
use std::cmp::max;
use std::fmt;
use std::sync::Arc;
use style::computed_values::{border_collapse, border_spacing, table_layout};
use style::properties::ComputedValues;
use style::values::CSSFloat;
use style::values::computed::{LengthOrPercentageOrAuto};
use style::computed_values::table_layout;
use std::sync::Arc;
use style::values::computed::LengthOrPercentageOrAuto;
use util::geometry::Au;
use util::logical_geometry::{LogicalRect, WritingMode};
/// A table flow corresponded to the table's internal table fragment under a table wrapper flow.
/// The properties `position`, `float`, and `margin-*` are used on the table wrapper fragment,
@ -140,17 +141,6 @@ impl TableFlow {
total_inline_sizes
}
/// Assign block-size for table flow.
///
/// TODO(#2014, pcwalton): This probably doesn't handle margin collapse right.
///
/// inline(always) because this is only ever called by in-order or non-in-order top-level
/// methods
#[inline(always)]
fn assign_block_size_table_base<'a>(&mut self, layout_context: &'a LayoutContext<'a>) {
self.block_flow.assign_block_size_block_base(layout_context, MarginsMayCollapseFlag::MarginsMayNotCollapse);
}
/// Updates the minimum and preferred inline-size calculation for a single row. This is
/// factored out into a separate function because we process children of rowgroups too.
fn update_column_inline_sizes_for_row(child: &mut Flow,
@ -183,6 +173,20 @@ impl TableFlow {
}
}
}
/// Returns the effective spacing per cell, taking the value of `border-collapse` into account.
fn spacing(&self) -> border_spacing::T {
let style = self.block_flow.fragment.style();
match style.get_inheritedtable().border_collapse {
border_collapse::T::separate => style.get_inheritedtable().border_spacing,
border_collapse::T::collapse => {
border_spacing::T {
horizontal: Au(0),
vertical: Au(0),
}
}
}
}
}
impl Flow for TableFlow {
@ -218,6 +222,8 @@ impl Flow for TableFlow {
let _scope = layout_debug_scope!("table::bubble_inline_sizes {:x}",
self.block_flow.base.debug_id());
// Don't use `compute_intrinsic_inline_sizes` here because that will count padding as
// part of the table, which we don't want to do—it belongs to the table wrapper instead.
let mut computation = IntrinsicISizesContribution::new();
let mut did_first_row = false;
for kid in self.block_flow.base.child_iter() {
@ -256,6 +262,14 @@ impl Flow for TableFlow {
}
}
let spacing = self.block_flow
.fragment
.style()
.get_inheritedtable()
.border_spacing
.horizontal * (self.column_intrinsic_inline_sizes.len() as i32 + 1);
computation.surrounding_size = computation.surrounding_size + spacing;
self.block_flow.base.intrinsic_inline_sizes = computation.finish()
}
@ -272,24 +286,26 @@ impl Flow for TableFlow {
let mut num_unspecified_inline_sizes = 0;
let mut total_column_inline_size = Au(0);
for column_inline_size in self.column_intrinsic_inline_sizes.iter() {
let this_column_inline_size = column_inline_size.minimum_length;
if this_column_inline_size == Au(0) {
num_unspecified_inline_sizes += 1
if column_inline_size.constrained {
total_column_inline_size = total_column_inline_size +
column_inline_size.minimum_length
} else {
total_column_inline_size = total_column_inline_size + this_column_inline_size
num_unspecified_inline_sizes += 1
}
}
let inline_size_computer = InternalTable;
inline_size_computer.compute_used_inline_size(&mut self.block_flow,
layout_context,
containing_block_inline_size);
let inline_start_content_edge = self.block_flow.fragment.border_padding.inline_start;
let padding_and_borders = self.block_flow.fragment.border_padding.inline_start_end();
let spacing_per_cell = self.spacing();
let spacing = spacing_per_cell.horizontal *
(self.column_intrinsic_inline_sizes.len() as i32 + 1);
let content_inline_size =
self.block_flow.fragment.border_box.size.inline - padding_and_borders;
self.block_flow.fragment.border_box.size.inline - padding_and_borders - spacing;
match self.table_layout {
TableLayout::Fixed => {
@ -305,11 +321,9 @@ impl Flow for TableFlow {
});
}
} else if num_unspecified_inline_sizes != 0 {
let extra_column_inline_size =
(content_inline_size - total_column_inline_size) /
num_unspecified_inline_sizes;
let extra_column_inline_size = content_inline_size - total_column_inline_size;
for column_inline_size in self.column_intrinsic_inline_sizes.iter() {
if column_inline_size.minimum_length == Au(0) &&
if !column_inline_size.constrained &&
column_inline_size.percentage == 0.0 {
self.column_computed_inline_sizes.push(ColumnComputedInlineSize {
size: extra_column_inline_size / num_unspecified_inline_sizes,
@ -332,16 +346,20 @@ impl Flow for TableFlow {
self.block_flow.base.flags.remove(IMPACTED_BY_LEFT_FLOATS);
self.block_flow.base.flags.remove(IMPACTED_BY_RIGHT_FLOATS);
self.block_flow.propagate_assigned_inline_size_to_children(
layout_context,
inline_start_content_edge,
content_inline_size,
Some(self.column_computed_inline_sizes.as_slice()));
let info = ChildInlineSizeInfo {
column_computed_inline_sizes: self.column_computed_inline_sizes.as_slice(),
spacing: spacing_per_cell,
};
self.block_flow.propagate_assigned_inline_size_to_children(layout_context,
inline_start_content_edge,
content_inline_size,
Some(info));
}
fn assign_block_size<'a>(&mut self, ctx: &'a LayoutContext<'a>) {
fn assign_block_size<'a>(&mut self, layout_context: &'a LayoutContext<'a>) {
debug!("assign_block_size: assigning block_size for table");
self.assign_block_size_table_base(ctx);
let vertical_spacing = self.spacing().vertical;
self.block_flow.assign_block_size_for_table_like_flow(layout_context, vertical_spacing)
}
fn compute_absolute_position(&mut self) {
@ -417,6 +435,90 @@ impl ISizeAndMarginsComputer for InternalTable {
}
}
/// Encapsulates functionality shared among all table-like flows: for now, tables and table
/// rowgroups.
pub trait TableLikeFlow {
/// Lays out the rows of a table.
fn assign_block_size_for_table_like_flow<'a>(&mut self,
layout_context: &'a LayoutContext<'a>,
block_direction_spacing: Au);
}
impl TableLikeFlow for BlockFlow {
fn assign_block_size_for_table_like_flow<'a>(&mut self,
_: &'a LayoutContext<'a>,
block_direction_spacing: Au) {
if self.base.restyle_damage.contains(REFLOW) {
// Our current border-box position.
let block_start_border_padding = self.fragment.border_padding.block_start;
let mut current_block_offset = block_start_border_padding;
// At this point, `current_block_offset` is at the content edge of our box. Now iterate
// over children.
let mut layers_needed_for_descendants = false;
for kid in self.base.child_iter() {
// Mark flows for layerization if necessary to handle painting order correctly.
block::propagate_layer_flag_from_child(&mut layers_needed_for_descendants, kid);
// Account for spacing.
if kid.is_table_row() {
current_block_offset = current_block_offset + block_direction_spacing;
}
// At this point, `current_block_offset` is at the border edge of the child.
flow::mut_base(kid).position.start.b = current_block_offset;
// Move past the child's border box. Do not use the `translate_including_floats`
// function here because the child has already translated floats past its border
// box.
let kid_base = flow::mut_base(kid);
current_block_offset = current_block_offset + kid_base.position.size.block;
}
// Collect various offsets needed by absolutely positioned descendants.
(&mut *self as &mut Flow).collect_static_block_offsets_from_children();
// Compute any explicitly-specified block size.
// Can't use `for` because we assign to `candidate_block_size_iterator.candidate_value`.
let mut block_size = current_block_offset - block_start_border_padding;
let mut candidate_block_size_iterator = CandidateBSizeIterator::new(
&self.fragment,
self.base.block_container_explicit_block_size);
loop {
match candidate_block_size_iterator.next() {
Some(candidate_block_size) => {
candidate_block_size_iterator.candidate_value =
match candidate_block_size {
MaybeAuto::Auto => block_size,
MaybeAuto::Specified(value) => value
}
}
None => break,
}
}
// Adjust `current_block_offset` as necessary to account for the explicitly-specified
// block-size.
block_size = candidate_block_size_iterator.candidate_value;
let delta = block_size - (current_block_offset - block_start_border_padding);
current_block_offset = current_block_offset + delta;
// Take border, padding, and spacing into account.
let block_end_offset = self.fragment.border_padding.block_end +
block_direction_spacing;
current_block_offset = current_block_offset + block_end_offset;
// Now that `current_block_offset` is at the block-end of the border box, compute the
// final border box position.
self.fragment.border_box.size.block = current_block_offset;
self.fragment.border_box.start.b = Au(0);
self.base.position.size.block = current_block_offset;
}
self.base.restyle_damage.remove(REFLOW_OUT_OF_FLOW | REFLOW);
}
}
/// Information about the intrinsic inline sizes of columns within a table.
///
/// During table inline-size bubbling, we might need to store both a percentage constraint and a
@ -472,8 +574,69 @@ impl ColumnIntrinsicInlineSize {
///
/// TODO(pcwalton): There will probably be some `border-collapse`-related info in here too
/// eventually.
#[derive(RustcEncodable, Copy)]
#[derive(RustcEncodable, Clone, Copy)]
pub struct ColumnComputedInlineSize {
/// The computed size of this inline column.
pub size: Au,
}
/// Inline-size information that we need to push down to table children.
pub struct ChildInlineSizeInfo<'a> {
/// The spacing of the table.
pub spacing: border_spacing::T,
/// The computed inline sizes for each column.
pub column_computed_inline_sizes: &'a [ColumnComputedInlineSize],
}
impl<'a> ChildInlineSizeInfo<'a> {
/// Propagates information computed during inline size assignment to a child of a table, and
/// lays out that child in the inline direction.
pub fn propagate_to_child(&self,
kid: &mut Flow,
child_index: uint,
content_inline_size: Au,
writing_mode: WritingMode,
inline_start_margin_edge: &mut Au) {
// If the child is a table or a row, copy computed inline size information from its parent.
//
// FIXME(pcwalton): This seems inefficient. Reference count it instead?
let inline_size;
if kid.is_table() {
let table_kid = kid.as_table();
table_kid.column_computed_inline_sizes = self.column_computed_inline_sizes.to_vec();
inline_size = content_inline_size
} else if kid.is_table_rowgroup() {
let table_rowgroup_kid = kid.as_table_rowgroup();
table_rowgroup_kid.column_computed_inline_sizes =
self.column_computed_inline_sizes.to_vec();
table_rowgroup_kid.spacing = self.spacing;
inline_size = content_inline_size
} else if kid.is_table_row() {
let table_row_kid = kid.as_table_row();
table_row_kid.column_computed_inline_sizes =
self.column_computed_inline_sizes.to_vec();
table_row_kid.spacing = self.spacing;
inline_size = content_inline_size
} else if kid.is_table_cell() {
// Take spacing into account.
*inline_start_margin_edge = *inline_start_margin_edge + self.spacing.horizontal;
inline_size = self.column_computed_inline_sizes[child_index].size;
} else {
// ISize of kid flow is our content inline-size.
inline_size = content_inline_size
}
{
let kid_base = flow::mut_base(kid);
kid_base.position.start.i = *inline_start_margin_edge;
kid_base.block_container_inline_size = inline_size;
kid_base.block_container_writing_mode = writing_mode
}
// Move over for the next table cell.
if kid.is_table_cell() {
*inline_start_margin_edge = *inline_start_margin_edge + inline_size
}
}
}

49
components/layout/table_row.rs
View file

@ -12,7 +12,8 @@ use context::LayoutContext;
use flow::{self, FlowClass, Flow, ImmutableFlowUtils};
use fragment::{Fragment, FragmentBorderBoxIterator};
use layout_debug;
use table::{ColumnComputedInlineSize, ColumnIntrinsicInlineSize, InternalTable};
use table::{ChildInlineSizeInfo, ColumnComputedInlineSize, ColumnIntrinsicInlineSize};
use table::{InternalTable};
use model::MaybeAuto;
use wrapper::ThreadSafeLayoutNode;
@ -21,9 +22,10 @@ use util::geometry::Au;
use util::logical_geometry::LogicalRect;
use std::cmp::max;
use std::fmt;
use std::sync::Arc;
use style::computed_values::border_spacing;
use style::properties::ComputedValues;
use style::values::computed::LengthOrPercentageOrAuto;
use std::sync::Arc;
/// A single row of a table.
#[derive(RustcEncodable)]
@ -35,6 +37,10 @@ pub struct TableRowFlow {
/// Information about the computed inline-sizes of each column.
pub column_computed_inline_sizes: Vec<ColumnComputedInlineSize>,
/// The spacing for this row, propagated down from the table during the inline-size assignment
/// phase.
pub spacing: border_spacing::T,
}
/// Information about the column inline size and span for each cell.
@ -53,6 +59,10 @@ impl TableRowFlow {
block_flow: BlockFlow::from_node_and_fragment(node, fragment),
cell_intrinsic_inline_sizes: Vec::new(),
column_computed_inline_sizes: Vec::new(),
spacing: border_spacing::T {
horizontal: Au(0),
vertical: Au(0),
},
}
}
@ -76,11 +86,9 @@ impl TableRowFlow {
fn assign_block_size_table_row_base<'a>(&mut self, layout_context: &'a LayoutContext<'a>) {
let (block_start_offset, _, _) = self.initialize_offsets();
let /* mut */ cur_y = block_start_offset;
// Per CSS 2.1 § 17.5.3, find max_y = max(computed `block-size`, minimum block-size of all
// cells).
let mut max_y = Au(0);
let mut max_block_size = Au(0);
let thread_id = self.block_flow.base.thread_id;
for kid in self.block_flow.base.child_iter() {
kid.place_float_if_applicable(layout_context);
@ -93,17 +101,18 @@ impl TableRowFlow {
// TODO: Percentage block-size
let child_specified_block_size =
MaybeAuto::from_style(child_fragment.style().content_block_size(),
Au::new(0)).specified_or_zero();
max_y = max(max_y,
child_specified_block_size +
child_fragment.border_padding.block_start_end());
Au(0)).specified_or_zero();
max_block_size =
max(max_block_size,
child_specified_block_size +
child_fragment.border_padding.block_start_end());
}
let child_node = flow::mut_base(kid);
child_node.position.start.b = cur_y;
max_y = max(max_y, child_node.position.size.block);
child_node.position.start.b = block_start_offset;
max_block_size = max(max_block_size, child_node.position.size.block);
}
let mut block_size = max_y;
let mut block_size = max_block_size;
// TODO: Percentage block-size
block_size = match MaybeAuto::from_style(self.block_flow
.fragment
@ -113,11 +122,8 @@ impl TableRowFlow {
MaybeAuto::Auto => block_size,
MaybeAuto::Specified(value) => max(value, block_size)
};
// cur_y = cur_y + block-size;
// Assign the block-size of own fragment
//
// FIXME(pcwalton): Take `cur_y` into account.
let mut position = self.block_flow.fragment.border_box;
position.size.block = block_size;
self.block_flow.fragment.border_box = position;
@ -273,11 +279,14 @@ impl Flow for TableRowFlow {
}
// Push those inline sizes down to the cells.
self.block_flow.propagate_assigned_inline_size_to_children(
layout_context,
inline_start_content_edge,
containing_block_inline_size,
Some(computed_inline_size_for_cells.as_slice()));
let info = ChildInlineSizeInfo {
column_computed_inline_sizes: computed_inline_size_for_cells.as_slice(),
spacing: self.spacing,
};
self.block_flow.propagate_assigned_inline_size_to_children(layout_context,
inline_start_content_edge,
containing_block_inline_size,
Some(info));
}
fn assign_block_size<'a>(&mut self, ctx: &'a LayoutContext<'a>) {

40
components/layout/table_rowgroup.rs
View file

@ -6,12 +6,14 @@
#![deny(unsafe_blocks)]
use block::{BlockFlow, ISizeAndMarginsComputer, MarginsMayCollapseFlag};
use block::{BlockFlow, ISizeAndMarginsComputer};
use context::LayoutContext;
use flow::{FlowClass, Flow};
use fragment::{Fragment, FragmentBorderBoxIterator};
use layout_debug;
use table::{ColumnComputedInlineSize, ColumnIntrinsicInlineSize, InternalTable};
use style::computed_values::border_spacing;
use table::{ChildInlineSizeInfo, ColumnComputedInlineSize, ColumnIntrinsicInlineSize};
use table::{InternalTable, TableLikeFlow};
use wrapper::ThreadSafeLayoutNode;
use geom::{Point2D, Rect};
@ -32,6 +34,9 @@ pub struct TableRowGroupFlow {
/// Information about the actual inline sizes of each column.
pub column_computed_inline_sizes: Vec<ColumnComputedInlineSize>,
/// The spacing for this rowgroup.
pub spacing: border_spacing::T,
}
impl TableRowGroupFlow {
@ -41,21 +46,16 @@ impl TableRowGroupFlow {
block_flow: BlockFlow::from_node_and_fragment(node, fragment),
column_intrinsic_inline_sizes: Vec::new(),
column_computed_inline_sizes: Vec::new(),
spacing: border_spacing::T {
horizontal: Au(0),
vertical: Au(0),
},
}
}
pub fn fragment<'a>(&'a mut self) -> &'a Fragment {
&self.block_flow.fragment
}
/// Assign block-size for table-rowgroup flow.
///
/// inline(always) because this is only ever called by in-order or non-in-order top-level
/// methods.
#[inline(always)]
fn assign_block_size_table_rowgroup_base<'a>(&mut self, layout_context: &'a LayoutContext<'a>) {
self.block_flow.assign_block_size_block_base(layout_context, MarginsMayCollapseFlag::MarginsMayNotCollapse)
}
}
impl Flow for TableRowGroupFlow {
@ -109,16 +109,20 @@ impl Flow for TableRowGroupFlow {
layout_context,
containing_block_inline_size);
self.block_flow.propagate_assigned_inline_size_to_children(
layout_context,
inline_start_content_edge,
content_inline_size,
Some(self.column_computed_inline_sizes.as_slice()));
let info = ChildInlineSizeInfo {
column_computed_inline_sizes: self.column_computed_inline_sizes.as_slice(),
spacing: self.spacing,
};
self.block_flow.propagate_assigned_inline_size_to_children(layout_context,
inline_start_content_edge,
content_inline_size,
Some(info));
}
fn assign_block_size<'a>(&mut self, ctx: &'a LayoutContext<'a>) {
fn assign_block_size<'a>(&mut self, layout_context: &'a LayoutContext<'a>) {
debug!("assign_block_size: assigning block_size for table_rowgroup");
self.assign_block_size_table_rowgroup_base(ctx);
self.block_flow.assign_block_size_for_table_like_flow(layout_context,
self.spacing.vertical)
}
fn compute_absolute_position(&mut self) {

92
components/layout/table_wrapper.rs
View file

@ -20,7 +20,7 @@ use floats::FloatKind;
use flow::{FlowClass, Flow, ImmutableFlowUtils};
use flow::{IMPACTED_BY_LEFT_FLOATS, IMPACTED_BY_RIGHT_FLOATS};
use fragment::{Fragment, FragmentBorderBoxIterator};
use table::{ColumnComputedInlineSize, ColumnIntrinsicInlineSize};
use table::{ChildInlineSizeInfo, ColumnComputedInlineSize, ColumnIntrinsicInlineSize};
use wrapper::ThreadSafeLayoutNode;
use geom::{Point2D, Rect};
@ -28,11 +28,11 @@ use util::geometry::Au;
use std::cmp::{max, min};
use std::fmt;
use std::ops::Add;
use style::properties::ComputedValues;
use std::sync::Arc;
use style::computed_values::table_layout;
use style::properties::ComputedValues;
use style::values::CSSFloat;
use style::values::computed::LengthOrPercentageOrAuto;
use std::sync::Arc;
#[derive(Copy, RustcEncodable, Debug)]
pub enum TableLayout {
@ -98,11 +98,19 @@ impl TableWrapperFlow {
// when normally the child computes it itself. But it has to be this way because the
// padding will affect where we place the child. This is an odd artifact of the way that
// tables are separated into table flows and table wrapper flows.
let available_inline_size = self.block_flow.fragment.border_box.size.inline;
let mut table_border_padding = Au(0);
let mut available_inline_size = self.block_flow.fragment.border_box.size.inline;
let (mut table_border_padding, mut spacing) = (Au(0), Au(0));
for kid in self.block_flow.base.child_iter() {
if kid.is_table() {
let kid_block = kid.as_block();
let spacing_per_cell = kid_block.fragment
.style()
.get_inheritedtable()
.border_spacing
.horizontal;
spacing = spacing_per_cell * (self.column_intrinsic_inline_sizes.len() as i32 + 1);
available_inline_size = self.block_flow.fragment.border_box.size.inline;
kid_block.fragment.compute_border_and_padding(available_inline_size);
kid_block.fragment.compute_block_direction_margins(available_inline_size);
kid_block.fragment.compute_inline_direction_margins(available_inline_size);
@ -114,18 +122,21 @@ impl TableWrapperFlow {
// FIXME(pcwalton, spec): INTRINSIC § 8 does not properly define how to compute this, but
// says "the basic idea is the same as the shrink-to-fit width that CSS2.1 defines". So we
// just use the shrink-to-fit inline size.
let available_inline_size = match self.block_flow.fragment.style().content_inline_size() {
LengthOrPercentageOrAuto::Auto => self.block_flow
.get_shrink_to_fit_inline_size(available_inline_size),
// FIXME(mttr) This fixes #4421 without breaking our current reftests, but I'm
// not completely sure this is "correct".
//
// That said, `available_inline_size` is, as far as I can tell, equal to the table's
// computed width property (W) and is used from this point forward in a way that seems
// to correspond with CSS 2.1 § 17.5.2.2 under "Column and caption widths
// influence the final table width as follows: ..."
_ => available_inline_size,
};
let mut available_inline_size =
match self.block_flow.fragment.style().content_inline_size() {
LengthOrPercentageOrAuto::Auto => {
self.block_flow.get_shrink_to_fit_inline_size(available_inline_size)
}
// FIXME(mttr): This fixes #4421 without breaking our current reftests, but I'm
// not completely sure this is "correct".
//
// That said, `available_inline_size` is, as far as I can tell, equal to the
// table's computed width property (W) and is used from this point forward in a way
// that seems to correspond with CSS 2.1 § 17.5.2.2 under "Column and caption
// widths influence the final table width as follows: …"
_ => available_inline_size,
};
available_inline_size = available_inline_size - spacing;
// Compute all the guesses for the column sizes, and sum them.
let mut total_guess = AutoLayoutCandidateGuess::new();
@ -153,8 +164,8 @@ impl TableWrapperFlow {
//
// FIXME(pcwalton, spec): How do I deal with fractional excess?
let excess_inline_size = available_inline_size - total_used_inline_size;
if excess_inline_size > Au(0) &&
selection == SelectedAutoLayoutCandidateGuess::UsePreferredGuessAndDistributeExcessInlineSize {
if excess_inline_size > Au(0) && selection ==
SelectedAutoLayoutCandidateGuess::UsePreferredGuessAndDistributeExcessInlineSize {
let mut info = ExcessInlineSizeDistributionInfo::new();
for column_intrinsic_inline_size in self.column_intrinsic_inline_sizes.iter() {
info.update(column_intrinsic_inline_size)
@ -173,10 +184,12 @@ impl TableWrapperFlow {
total_used_inline_size = available_inline_size
}
self.block_flow.fragment.border_box.size.inline = total_used_inline_size +
table_border_padding;
table_border_padding + spacing;
self.block_flow.base.position.size.inline = total_used_inline_size +
table_border_padding + self.block_flow.fragment.margin.inline_start_end();
table_border_padding + spacing + self.block_flow.fragment.margin.inline_start_end();
}
fn compute_used_inline_size(&mut self,
@ -301,11 +314,15 @@ impl Flow for TableWrapperFlow {
None)
}
Some(ref assigned_column_inline_sizes) => {
self.block_flow.propagate_assigned_inline_size_to_children(
layout_context,
inline_start_content_edge,
content_inline_size,
Some(assigned_column_inline_sizes.as_slice()));
let info = ChildInlineSizeInfo {
column_computed_inline_sizes: assigned_column_inline_sizes.as_slice(),
spacing: self.block_flow.fragment.style().get_inheritedtable().border_spacing,
};
self.block_flow
.propagate_assigned_inline_size_to_children(layout_context,
inline_start_content_edge,
content_inline_size,
Some(info));
}
}
@ -458,13 +475,16 @@ impl AutoLayoutCandidateGuess {
fn calculate(&self, selection: SelectedAutoLayoutCandidateGuess) -> Au {
match selection {
SelectedAutoLayoutCandidateGuess::UseMinimumGuess => self.minimum_guess,
SelectedAutoLayoutCandidateGuess::InterpolateBetweenMinimumGuessAndMinimumPercentageGuess(weight) => {
SelectedAutoLayoutCandidateGuess::
InterpolateBetweenMinimumGuessAndMinimumPercentageGuess(weight) => {
interp(self.minimum_guess, self.minimum_percentage_guess, weight)
}
SelectedAutoLayoutCandidateGuess::InterpolateBetweenMinimumPercentageGuessAndMinimumSpecifiedGuess(weight) => {
SelectedAutoLayoutCandidateGuess::
InterpolateBetweenMinimumPercentageGuessAndMinimumSpecifiedGuess(weight) => {
interp(self.minimum_percentage_guess, self.minimum_specified_guess, weight)
}
SelectedAutoLayoutCandidateGuess::InterpolateBetweenMinimumSpecifiedGuessAndPreferredGuess(weight) => {
SelectedAutoLayoutCandidateGuess::
InterpolateBetweenMinimumSpecifiedGuessAndPreferredGuess(weight) => {
interp(self.minimum_specified_guess, self.preferred_guess, weight)
}
SelectedAutoLayoutCandidateGuess::UsePreferredGuessAndDistributeExcessInlineSize => {
@ -590,9 +610,17 @@ impl ExcessInlineSizeDistributionInfo {
total_distributed_excess_size: &mut Au) {
let proportion =
if self.preferred_inline_size_of_nonconstrained_columns_with_no_percentage > Au(0) {
column_intrinsic_inline_size.preferred.to_subpx() /
self.preferred_inline_size_of_nonconstrained_columns_with_no_percentage
.to_subpx()
// FIXME(spec, pcwalton): Gecko and WebKit do *something* here when there are
// nonconstrained columns with no percentage *and* no preferred width. What do they
// do?
if !column_intrinsic_inline_size.constrained &&
column_intrinsic_inline_size.percentage == 0.0 {
column_intrinsic_inline_size.preferred.to_subpx() /
self.preferred_inline_size_of_nonconstrained_columns_with_no_percentage
.to_subpx()
} else {
0.0
}
} else if self.count_of_nonconstrained_columns_with_no_percentage > 0 {
1.0 / (self.count_of_nonconstrained_columns_with_no_percentage as CSSFloat)
} else if self.preferred_inline_size_of_constrained_columns_with_no_percentage >

4
components/layout/wrapper.rs
View file

@ -635,8 +635,8 @@ impl<'le> TElement<'le> for LayoutElement<'le> {
#[inline]
fn has_nonzero_border(self) -> bool {
unsafe {
match self.element
.get_unsigned_integer_attribute_for_layout(UnsignedIntegerAttribute::Border) {
match self.element.get_unsigned_integer_attribute_for_layout(
UnsignedIntegerAttribute::Border) {
None | Some(0) => false,
_ => true,
}