diff options
Diffstat (limited to 'components/layout/table_rowgroup.rs')
| -rw-r--r-- | components/layout/table_rowgroup.rs | 208 |
1 files changed, 208 insertions, 0 deletions
diff --git a/components/layout/table_rowgroup.rs b/components/layout/table_rowgroup.rs new file mode 100644 index 00000000000..48f9d376af3 --- /dev/null +++ b/components/layout/table_rowgroup.rs @@ -0,0 +1,208 @@ +/* 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_block)] + +use block::BlockFlow; +use block::ISizeAndMarginsComputer; +use construct::FlowConstructor; +use context::LayoutContext; +use flow::{TableRowGroupFlowClass, FlowClass, Flow, ImmutableFlowUtils}; +use flow; +use fragment::Fragment; +use table::{InternalTable, TableFlow}; +use wrapper::ThreadSafeLayoutNode; + +use servo_util::geometry::Au; +use servo_util::geometry; +use std::fmt; + +/// A table formatting context. +pub struct TableRowGroupFlow { + pub block_flow: BlockFlow, + + /// Column inline-sizes + pub col_inline_sizes: Vec<Au>, + + /// Column min inline-sizes. + pub col_min_inline_sizes: Vec<Au>, + + /// Column pref inline-sizes. + pub col_pref_inline_sizes: Vec<Au>, +} + +impl TableRowGroupFlow { + pub fn from_node_and_fragment(node: &ThreadSafeLayoutNode, + fragment: Fragment) + -> TableRowGroupFlow { + TableRowGroupFlow { + block_flow: BlockFlow::from_node_and_fragment(node, fragment), + col_inline_sizes: vec!(), + col_min_inline_sizes: vec!(), + col_pref_inline_sizes: vec!(), + } + } + + pub fn from_node(constructor: &mut FlowConstructor, + node: &ThreadSafeLayoutNode) + -> TableRowGroupFlow { + TableRowGroupFlow { + block_flow: BlockFlow::from_node(constructor, node), + col_inline_sizes: vec!(), + col_min_inline_sizes: vec!(), + col_pref_inline_sizes: vec!(), + } + } + + pub fn fragment<'a>(&'a mut self) -> &'a Fragment { + &self.block_flow.fragment + } + + fn initialize_offsets(&mut self) -> (Au, Au, Au) { + // TODO: If border-collapse: collapse, block-start_offset, block-end_offset, and inline-start_offset + // should be updated. Currently, they are set as Au(0). + (Au(0), Au(0), Au(0)) + } + + /// Assign block-size for table-rowgroup flow. + /// + /// FIXME(pcwalton): This doesn't handle floats 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_rowgroup_base<'a>(&mut self, layout_context: &'a LayoutContext<'a>) { + let (block_start_offset, _, _) = self.initialize_offsets(); + + let mut cur_y = block_start_offset; + + for kid in self.block_flow.base.child_iter() { + kid.assign_block_size_for_inorder_child_if_necessary(layout_context); + + let child_node = flow::mut_base(kid); + child_node.position.start.b = cur_y; + cur_y = cur_y + child_node.position.size.block; + } + + let block_size = cur_y - block_start_offset; + + let mut position = self.block_flow.fragment.border_box; + position.size.block = block_size; + self.block_flow.fragment.border_box = position; + self.block_flow.base.position.size.block = block_size; + } + + pub fn build_display_list_table_rowgroup(&mut self, layout_context: &LayoutContext) { + debug!("build_display_list_table_rowgroup: same process as block flow"); + self.block_flow.build_display_list_block(layout_context) + } +} + +impl Flow for TableRowGroupFlow { + fn class(&self) -> FlowClass { + TableRowGroupFlowClass + } + + fn as_table_rowgroup<'a>(&'a mut self) -> &'a mut TableRowGroupFlow { + self + } + + fn as_block<'a>(&'a mut self) -> &'a mut BlockFlow { + &mut self.block_flow + } + + fn col_inline_sizes<'a>(&'a mut self) -> &'a mut Vec<Au> { + &mut self.col_inline_sizes + } + + fn col_min_inline_sizes<'a>(&'a self) -> &'a Vec<Au> { + &self.col_min_inline_sizes + } + + fn col_pref_inline_sizes<'a>(&'a self) -> &'a Vec<Au> { + &self.col_pref_inline_sizes + } + + /// Recursively (bottom-up) determines the context's preferred and minimum inline-sizes. When called + /// on this context, all child contexts have had their min/pref inline-sizes set. This function must + /// decide min/pref inline-sizes based on child context inline-sizes and dimensions of any fragments it is + /// responsible for flowing. + /// Min/pref inline-sizes set by this function are used in automatic table layout calculation. + /// Also, this function finds the specified column inline-sizes from the first row. + /// Those are used in fixed table layout calculation + fn bubble_inline_sizes(&mut self, _: &LayoutContext) { + let mut min_inline_size = Au(0); + let mut pref_inline_size = Au(0); + + for kid in self.block_flow.base.child_iter() { + assert!(kid.is_table_row()); + + // calculate min_inline-size & pref_inline-size for automatic table layout calculation + // 'self.col_min_inline-sizes' collects the maximum value of cells' min-inline-sizes for each column. + // 'self.col_pref_inline-sizes' collects the maximum value of cells' pref-inline-sizes for each column. + if self.col_inline_sizes.is_empty() { // First Row + assert!(self.col_min_inline_sizes.is_empty() && self.col_pref_inline_sizes.is_empty()); + // 'self.col_inline-sizes' collects the specified column inline-sizes from the first table-row for fixed table layout calculation. + self.col_inline_sizes = kid.col_inline_sizes().clone(); + self.col_min_inline_sizes = kid.col_min_inline_sizes().clone(); + self.col_pref_inline_sizes = kid.col_pref_inline_sizes().clone(); + } else { + min_inline_size = TableFlow::update_col_inline_sizes(&mut self.col_min_inline_sizes, kid.col_min_inline_sizes()); + pref_inline_size = TableFlow::update_col_inline_sizes(&mut self.col_pref_inline_sizes, kid.col_pref_inline_sizes()); + + // update the number of column inline-sizes from table-rows. + let num_cols = self.col_inline_sizes.len(); + let num_child_cols = kid.col_min_inline_sizes().len(); + for i in range(num_cols, num_child_cols) { + self.col_inline_sizes.push(Au::new(0)); + let new_kid_min = kid.col_min_inline_sizes()[i]; + self.col_min_inline_sizes.push(kid.col_min_inline_sizes()[i]); + let new_kid_pref = kid.col_pref_inline_sizes()[i]; + self.col_pref_inline_sizes.push(kid.col_pref_inline_sizes()[i]); + min_inline_size = min_inline_size + new_kid_min; + pref_inline_size = pref_inline_size + new_kid_pref; + } + } + } + + self.block_flow.base.intrinsic_inline_sizes.minimum_inline_size = min_inline_size; + self.block_flow.base.intrinsic_inline_sizes.preferred_inline_size = geometry::max(min_inline_size, + pref_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 context. + fn assign_inline_sizes(&mut self, ctx: &LayoutContext) { + debug!("assign_inline_sizes({}): assigning inline_size for flow", "table_rowgroup"); + + // The position was set to the containing block by the flow's parent. + let containing_block_inline_size = self.block_flow.base.position.size.inline; + // FIXME: In case of border-collapse: collapse, inline-start_content_edge should be + // the border width on the inline-start side. + let inline_start_content_edge = Au::new(0); + let content_inline_size = containing_block_inline_size; + + let inline_size_computer = InternalTable; + inline_size_computer.compute_used_inline_size(&mut self.block_flow, ctx, containing_block_inline_size); + + self.block_flow.propagate_assigned_inline_size_to_children(inline_start_content_edge, content_inline_size, Some(self.col_inline_sizes.clone())); + } + + fn assign_block_size<'a>(&mut self, ctx: &'a LayoutContext<'a>) { + debug!("assign_block_size: assigning block_size for table_rowgroup"); + self.assign_block_size_table_rowgroup_base(ctx); + } + + fn compute_absolute_position(&mut self) { + self.block_flow.compute_absolute_position() + } +} + +impl fmt::Show for TableRowGroupFlow { + fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result { + write!(f, "TableRowGroupFlow: {}", self.block_flow.fragment) + } +} |