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/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
//! CSS table formatting contexts.
#![deny(unsafe_blocks)]
use block::{BlockFlow, ISizeAndMarginsComputer, MarginsMayCollapseFlag};
use context::LayoutContext;
use flow::{Flow, FlowClass};
use fragment::{Fragment, FragmentBoundsIterator};
use model::{MaybeAuto};
use layout_debug;
use table::InternalTable;
use wrapper::ThreadSafeLayoutNode;
use servo_util::geometry::Au;
use std::fmt;
use style::{UnsignedIntegerAttribute, ComputedValues};
use sync::Arc;
/// A table formatting context.
#[deriving(Encodable)]
pub struct TableCellFlow {
/// Data common to all block flows.
pub block_flow: BlockFlow,
/// The column span of this cell.
pub column_span: u32,
/// Whether this cell is visible. If false, the value of `empty-cells` means that we must not
/// display this cell.
pub visible: bool,
}
impl TableCellFlow {
pub fn from_node_fragment_and_visibility_flag(node: &ThreadSafeLayoutNode,
fragment: Fragment,
visible: bool)
-> TableCellFlow {
TableCellFlow {
block_flow: BlockFlow::from_node_and_fragment(node, fragment),
column_span: node.get_unsigned_integer_attribute(UnsignedIntegerAttribute::ColSpan)
.unwrap_or(1),
visible: visible,
}
}
pub fn fragment<'a>(&'a mut self) -> &'a Fragment {
&self.block_flow.fragment
}
pub fn mut_fragment<'a>(&'a mut self) -> &'a mut Fragment {
&mut self.block_flow.fragment
}
/// Assign block-size for table-cell 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_cell_base<'a>(&mut self, layout_context: &'a LayoutContext<'a>) {
self.block_flow.assign_block_size_block_base(
layout_context,
MarginsMayCollapseFlag::MarginsMayNotCollapse)
}
}
impl Flow for TableCellFlow {
fn class(&self) -> FlowClass {
FlowClass::TableCell
}
fn as_table_cell<'a>(&'a mut self) -> &'a mut TableCellFlow {
self
}
fn as_immutable_table_cell<'a>(&'a self) -> &'a TableCellFlow {
self
}
fn as_block<'a>(&'a mut self) -> &'a mut BlockFlow {
&mut self.block_flow
}
/// Minimum/preferred inline-sizes set by this function are used in automatic table layout
/// calculation.
fn bubble_inline_sizes(&mut self) {
let _scope = layout_debug_scope!("table_cell::bubble_inline_sizes {:x}",
self.block_flow.base.debug_id());
self.block_flow.bubble_inline_sizes();
let specified_inline_size = MaybeAuto::from_style(self.block_flow
.fragment
.style()
.content_inline_size(),
Au(0)).specified_or_zero();
if self.block_flow.base.intrinsic_inline_sizes.minimum_inline_size <
specified_inline_size {
self.block_flow.base.intrinsic_inline_sizes.minimum_inline_size = specified_inline_size
}
if self.block_flow.base.intrinsic_inline_sizes.preferred_inline_size <
self.block_flow.base.intrinsic_inline_sizes.minimum_inline_size {
self.block_flow.base.intrinsic_inline_sizes.preferred_inline_size =
self.block_flow.base.intrinsic_inline_sizes.minimum_inline_size;
}
}
/// Recursively (top-down) determines the actual inline-size of child contexts and fragments.
/// When called on this context, the context has had its inline-size set by the parent table
/// row.
fn assign_inline_sizes(&mut self, layout_context: &LayoutContext) {
let _scope = layout_debug_scope!("table_cell::assign_inline_sizes {:x}",
self.block_flow.base.debug_id());
debug!("assign_inline_sizes({}): assigning inline_size for flow", "table_cell");
// The position was set to the column inline-size by the parent flow, table row flow.
let containing_block_inline_size = self.block_flow.base.block_container_inline_size;
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_box.start.i +
self.block_flow.fragment.border_padding.inline_start;
let padding_and_borders = self.block_flow.fragment.border_padding.inline_start_end();
let content_inline_size =
self.block_flow.fragment.border_box.size.inline - padding_and_borders;
self.block_flow.propagate_assigned_inline_size_to_children(layout_context,
inline_start_content_edge,
content_inline_size,
None);
}
fn assign_block_size<'a>(&mut self, ctx: &'a LayoutContext<'a>) {
debug!("assign_block_size: assigning block_size for table_cell");
self.assign_block_size_table_cell_base(ctx);
}
fn compute_absolute_position(&mut self) {
self.block_flow.compute_absolute_position()
}
fn update_late_computed_inline_position_if_necessary(&mut self, inline_position: Au) {
self.block_flow.update_late_computed_inline_position_if_necessary(inline_position)
}
fn update_late_computed_block_position_if_necessary(&mut self, block_position: Au) {
self.block_flow.update_late_computed_block_position_if_necessary(block_position)
}
fn build_display_list(&mut self, layout_context: &LayoutContext) {
if self.visible {
self.block_flow.build_display_list(layout_context)
}
}
fn repair_style(&mut self, new_style: &Arc<ComputedValues>) {
self.block_flow.repair_style(new_style)
}
fn iterate_through_fragment_bounds(&self, iterator: &mut FragmentBoundsIterator) {
self.block_flow.iterate_through_fragment_bounds(iterator);
}
}
impl fmt::Show for TableCellFlow {
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
write!(f, "TableCellFlow: {}", self.block_flow)
}
}
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