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Cargoify servo
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1761 changed files with 8423 additions and 2294 deletions
208
components/layout/table_rowgroup.rs
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208
components/layout/table_rowgroup.rs
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/* 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_block)]
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use block::BlockFlow;
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use block::ISizeAndMarginsComputer;
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use construct::FlowConstructor;
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use context::LayoutContext;
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use flow::{TableRowGroupFlowClass, FlowClass, Flow, ImmutableFlowUtils};
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use flow;
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use fragment::Fragment;
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use table::{InternalTable, TableFlow};
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use wrapper::ThreadSafeLayoutNode;
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use servo_util::geometry::Au;
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use servo_util::geometry;
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use std::fmt;
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/// A table formatting context.
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pub struct TableRowGroupFlow {
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pub block_flow: BlockFlow,
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/// Column inline-sizes
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pub col_inline_sizes: Vec<Au>,
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/// Column min inline-sizes.
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pub col_min_inline_sizes: Vec<Au>,
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/// Column pref inline-sizes.
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pub col_pref_inline_sizes: Vec<Au>,
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}
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impl TableRowGroupFlow {
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pub fn from_node_and_fragment(node: &ThreadSafeLayoutNode,
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fragment: Fragment)
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-> TableRowGroupFlow {
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TableRowGroupFlow {
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block_flow: BlockFlow::from_node_and_fragment(node, fragment),
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col_inline_sizes: vec!(),
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col_min_inline_sizes: vec!(),
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col_pref_inline_sizes: vec!(),
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}
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}
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pub fn from_node(constructor: &mut FlowConstructor,
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node: &ThreadSafeLayoutNode)
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-> TableRowGroupFlow {
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TableRowGroupFlow {
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block_flow: BlockFlow::from_node(constructor, node),
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col_inline_sizes: vec!(),
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col_min_inline_sizes: vec!(),
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col_pref_inline_sizes: vec!(),
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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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fn initialize_offsets(&mut self) -> (Au, Au, Au) {
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// TODO: If border-collapse: collapse, block-start_offset, block-end_offset, and inline-start_offset
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// should be updated. Currently, they are set as Au(0).
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(Au(0), Au(0), Au(0))
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}
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/// Assign block-size for table-rowgroup flow.
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///
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/// FIXME(pcwalton): This doesn't handle floats 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_rowgroup_base<'a>(&mut self, layout_context: &'a LayoutContext<'a>) {
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let (block_start_offset, _, _) = self.initialize_offsets();
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let mut cur_y = block_start_offset;
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for kid in self.block_flow.base.child_iter() {
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kid.assign_block_size_for_inorder_child_if_necessary(layout_context);
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let child_node = flow::mut_base(kid);
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child_node.position.start.b = cur_y;
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cur_y = cur_y + child_node.position.size.block;
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}
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let block_size = cur_y - block_start_offset;
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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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}
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pub fn build_display_list_table_rowgroup(&mut self, layout_context: &LayoutContext) {
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debug!("build_display_list_table_rowgroup: same process as block flow");
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self.block_flow.build_display_list_block(layout_context)
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}
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}
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impl Flow for TableRowGroupFlow {
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fn class(&self) -> FlowClass {
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TableRowGroupFlowClass
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}
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fn as_table_rowgroup<'a>(&'a mut self) -> &'a mut TableRowGroupFlow {
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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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fn col_inline_sizes<'a>(&'a mut self) -> &'a mut Vec<Au> {
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&mut self.col_inline_sizes
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}
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fn col_min_inline_sizes<'a>(&'a self) -> &'a Vec<Au> {
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&self.col_min_inline_sizes
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}
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fn col_pref_inline_sizes<'a>(&'a self) -> &'a Vec<Au> {
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&self.col_pref_inline_sizes
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}
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/// Recursively (bottom-up) determines the context's preferred and minimum inline-sizes. When called
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/// on this context, all child contexts have had their min/pref inline-sizes set. This function must
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/// decide min/pref inline-sizes based on child context inline-sizes and dimensions of any fragments it is
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/// 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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/// Also, this function finds the specified column inline-sizes from the first row.
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/// Those are used in fixed table layout calculation
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fn bubble_inline_sizes(&mut self, _: &LayoutContext) {
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let mut min_inline_size = Au(0);
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let mut pref_inline_size = Au(0);
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for kid in self.block_flow.base.child_iter() {
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assert!(kid.is_table_row());
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// calculate min_inline-size & pref_inline-size for automatic table layout calculation
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// 'self.col_min_inline-sizes' collects the maximum value of cells' min-inline-sizes for each column.
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// 'self.col_pref_inline-sizes' collects the maximum value of cells' pref-inline-sizes for each column.
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if self.col_inline_sizes.is_empty() { // First Row
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assert!(self.col_min_inline_sizes.is_empty() && self.col_pref_inline_sizes.is_empty());
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// 'self.col_inline-sizes' collects the specified column inline-sizes from the first table-row for fixed table layout calculation.
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self.col_inline_sizes = kid.col_inline_sizes().clone();
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self.col_min_inline_sizes = kid.col_min_inline_sizes().clone();
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self.col_pref_inline_sizes = kid.col_pref_inline_sizes().clone();
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} else {
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min_inline_size = TableFlow::update_col_inline_sizes(&mut self.col_min_inline_sizes, kid.col_min_inline_sizes());
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pref_inline_size = TableFlow::update_col_inline_sizes(&mut self.col_pref_inline_sizes, kid.col_pref_inline_sizes());
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// update the number of column inline-sizes from table-rows.
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let num_cols = self.col_inline_sizes.len();
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let num_child_cols = kid.col_min_inline_sizes().len();
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for i in range(num_cols, num_child_cols) {
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self.col_inline_sizes.push(Au::new(0));
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let new_kid_min = kid.col_min_inline_sizes()[i];
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self.col_min_inline_sizes.push(kid.col_min_inline_sizes()[i]);
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let new_kid_pref = kid.col_pref_inline_sizes()[i];
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self.col_pref_inline_sizes.push(kid.col_pref_inline_sizes()[i]);
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min_inline_size = min_inline_size + new_kid_min;
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pref_inline_size = pref_inline_size + new_kid_pref;
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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 = geometry::max(min_inline_size,
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pref_inline_size);
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}
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/// Recursively (top-down) determines the actual inline-size of child contexts and fragments. When
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/// called on this context, the context has had its inline-size set by the parent context.
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fn assign_inline_sizes(&mut self, ctx: &LayoutContext) {
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debug!("assign_inline_sizes({}): assigning inline_size for flow", "table_rowgroup");
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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.position.size.inline;
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// FIXME: In case of border-collapse: collapse, inline-start_content_edge should be
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// the border width on the inline-start side.
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let inline_start_content_edge = Au::new(0);
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let content_inline_size = containing_block_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, ctx, containing_block_inline_size);
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self.block_flow.propagate_assigned_inline_size_to_children(inline_start_content_edge, content_inline_size, Some(self.col_inline_sizes.clone()));
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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_rowgroup");
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self.assign_block_size_table_rowgroup_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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}
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impl fmt::Show for TableRowGroupFlow {
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fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
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write!(f, "TableRowGroupFlow: {}", self.block_flow.fragment)
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}
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}
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