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Diffstat (limited to 'src/components/layout/table_wrapper.rs')
| -rw-r--r-- | src/components/layout/table_wrapper.rs | 325 |
1 files changed, 0 insertions, 325 deletions
diff --git a/src/components/layout/table_wrapper.rs b/src/components/layout/table_wrapper.rs deleted file mode 100644 index 2084ef52bdc..00000000000 --- a/src/components/layout/table_wrapper.rs +++ /dev/null @@ -1,325 +0,0 @@ -/* 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, MarginsMayNotCollapse, ISizeAndMarginsComputer}; -use block::{ISizeConstraintInput, ISizeConstraintSolution}; -use construct::FlowConstructor; -use context::LayoutContext; -use floats::FloatKind; -use flow::{TableWrapperFlowClass, FlowClass, Flow, ImmutableFlowUtils}; -use fragment::Fragment; -use model::{Specified, Auto, specified}; -use wrapper::ThreadSafeLayoutNode; - -use servo_util::geometry::Au; -use servo_util::geometry; -use std::fmt; -use style::computed_values::table_layout; - -pub enum TableLayout { - FixedLayout, - AutoLayout -} - -/// A table wrapper flow based on a block formatting context. -pub struct TableWrapperFlow { - pub block_flow: BlockFlow, - - /// Column inline-sizes - pub col_inline_sizes: Vec<Au>, - - /// Table-layout property - pub table_layout: TableLayout, -} - -impl TableWrapperFlow { - pub fn from_node_and_fragment(node: &ThreadSafeLayoutNode, - fragment: Fragment) - -> TableWrapperFlow { - let mut block_flow = BlockFlow::from_node_and_fragment(node, fragment); - let table_layout = if block_flow.fragment().style().get_table().table_layout == - table_layout::fixed { - FixedLayout - } else { - AutoLayout - }; - TableWrapperFlow { - block_flow: block_flow, - col_inline_sizes: vec!(), - table_layout: table_layout - } - } - - pub fn from_node(constructor: &mut FlowConstructor, - node: &ThreadSafeLayoutNode) - -> TableWrapperFlow { - let mut block_flow = BlockFlow::from_node(constructor, node); - let table_layout = if block_flow.fragment().style().get_table().table_layout == - table_layout::fixed { - FixedLayout - } else { - AutoLayout - }; - TableWrapperFlow { - block_flow: block_flow, - col_inline_sizes: vec!(), - table_layout: table_layout - } - } - - pub fn float_from_node(constructor: &mut FlowConstructor, - node: &ThreadSafeLayoutNode, - float_kind: FloatKind) - -> TableWrapperFlow { - let mut block_flow = BlockFlow::float_from_node(constructor, node, float_kind); - let table_layout = if block_flow.fragment().style().get_table().table_layout == - table_layout::fixed { - FixedLayout - } else { - AutoLayout - }; - TableWrapperFlow { - block_flow: block_flow, - col_inline_sizes: vec!(), - table_layout: table_layout - } - } - - pub fn is_float(&self) -> bool { - self.block_flow.float.is_some() - } - - /// Assign block-size for table-wrapper flow. - /// `Assign block-size` of table-wrapper flow follows a similar process to that of block 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_wrapper_base<'a>(&mut self, layout_context: &'a LayoutContext<'a>) { - self.block_flow.assign_block_size_block_base(layout_context, MarginsMayNotCollapse); - } - - pub fn build_display_list_table_wrapper(&mut self, layout_context: &LayoutContext) { - debug!("build_display_list_table_wrapper: same process as block flow"); - self.block_flow.build_display_list_block(layout_context); - } -} - -impl Flow for TableWrapperFlow { - fn class(&self) -> FlowClass { - TableWrapperFlowClass - } - - fn as_table_wrapper<'a>(&'a mut self) -> &'a mut TableWrapperFlow { - self - } - - fn as_block<'a>(&'a mut self) -> &'a mut BlockFlow { - &mut self.block_flow - } - - /* Recursively (bottom-up) determine 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. */ - - fn bubble_inline_sizes(&mut self, ctx: &LayoutContext) { - // get column inline-sizes info from table flow - for kid in self.block_flow.base.child_iter() { - assert!(kid.is_table_caption() || kid.is_table()); - - if kid.is_table() { - self.col_inline_sizes.push_all(kid.as_table().col_inline_sizes.as_slice()); - } - } - - self.block_flow.bubble_inline_sizes(ctx); - } - - /// 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. - /// - /// Dual fragments consume some inline-size first, and the remainder is assigned to all child (block) - /// contexts. - fn assign_inline_sizes(&mut self, ctx: &LayoutContext) { - debug!("assign_inline_sizes({}): assigning inline_size for flow", - if self.is_float() { - "floated table_wrapper" - } else { - "table_wrapper" - }); - - // 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; - - let inline_size_computer = TableWrapper; - inline_size_computer.compute_used_inline_size_table_wrapper(self, ctx, containing_block_inline_size); - - let inline_start_content_edge = self.block_flow.fragment.border_box.start.i; - let content_inline_size = self.block_flow.fragment.border_box.size.inline; - - match self.table_layout { - FixedLayout | _ if self.is_float() => - self.block_flow.base.position.size.inline = content_inline_size, - _ => {} - } - - // In case of fixed layout, column inline-sizes are calculated in table flow. - let assigned_col_inline_sizes = match self.table_layout { - FixedLayout => None, - AutoLayout => Some(self.col_inline_sizes.clone()) - }; - self.block_flow.propagate_assigned_inline_size_to_children(inline_start_content_edge, content_inline_size, assigned_col_inline_sizes); - } - - fn assign_block_size<'a>(&mut self, ctx: &'a LayoutContext<'a>) { - if self.is_float() { - debug!("assign_block_size_float: assigning block_size for floated table_wrapper"); - self.block_flow.assign_block_size_float(ctx); - } else { - debug!("assign_block_size: assigning block_size for table_wrapper"); - self.assign_block_size_table_wrapper_base(ctx); - } - } - - fn compute_absolute_position(&mut self) { - self.block_flow.compute_absolute_position() - } -} - -impl fmt::Show for TableWrapperFlow { - fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result { - if self.is_float() { - write!(f, "TableWrapperFlow(Float): {}", self.block_flow.fragment) - } else { - write!(f, "TableWrapperFlow: {}", self.block_flow.fragment) - } - } -} - -struct TableWrapper; - -impl TableWrapper { - fn compute_used_inline_size_table_wrapper(&self, - table_wrapper: &mut TableWrapperFlow, - ctx: &LayoutContext, - parent_flow_inline_size: Au) { - let input = self.compute_inline_size_constraint_inputs_table_wrapper(table_wrapper, - parent_flow_inline_size, - ctx); - - let solution = self.solve_inline_size_constraints(&mut table_wrapper.block_flow, &input); - - self.set_inline_size_constraint_solutions(&mut table_wrapper.block_flow, solution); - self.set_flow_x_coord_if_necessary(&mut table_wrapper.block_flow, solution); - } - - fn compute_inline_size_constraint_inputs_table_wrapper(&self, - table_wrapper: &mut TableWrapperFlow, - parent_flow_inline_size: Au, - ctx: &LayoutContext) - -> ISizeConstraintInput { - let mut input = self.compute_inline_size_constraint_inputs(&mut table_wrapper.block_flow, - parent_flow_inline_size, - ctx); - let computed_inline_size = match table_wrapper.table_layout { - FixedLayout => { - let fixed_cells_inline_size = table_wrapper.col_inline_sizes.iter().fold(Au(0), - |sum, inline_size| sum.add(inline_size)); - - let mut computed_inline_size = input.computed_inline_size.specified_or_zero(); - let style = table_wrapper.block_flow.fragment.style(); - - // Get inline-start and inline-end paddings, borders for table. - // We get these values from the fragment's style since table_wrapper doesn't have it's own border or padding. - // input.available_inline-size is same as containing_block_inline-size in table_wrapper. - let padding = style.logical_padding(); - let border = style.logical_border_width(); - let padding_and_borders = - specified(padding.inline_start, input.available_inline_size) + - specified(padding.inline_end, input.available_inline_size) + - border.inline_start + - border.inline_end; - // Compare border-edge inline-sizes. Because fixed_cells_inline-size indicates content-inline-size, - // padding and border values are added to fixed_cells_inline-size. - computed_inline_size = geometry::max( - fixed_cells_inline_size + padding_and_borders, computed_inline_size); - computed_inline_size - }, - AutoLayout => { - // Automatic table layout is calculated according to CSS 2.1 § 17.5.2.2. - let mut cap_min = Au(0); - let mut cols_min = Au(0); - let mut cols_max = Au(0); - let mut col_min_inline_sizes = &vec!(); - let mut col_pref_inline_sizes = &vec!(); - for kid in table_wrapper.block_flow.base.child_iter() { - if kid.is_table_caption() { - cap_min = kid.as_block().base.intrinsic_inline_sizes.minimum_inline_size; - } else { - assert!(kid.is_table()); - cols_min = kid.as_block().base.intrinsic_inline_sizes.minimum_inline_size; - cols_max = kid.as_block().base.intrinsic_inline_sizes.preferred_inline_size; - col_min_inline_sizes = kid.col_min_inline_sizes(); - col_pref_inline_sizes = kid.col_pref_inline_sizes(); - } - } - // 'extra_inline-size': difference between the calculated table inline-size and minimum inline-size - // required by all columns. It will be distributed over the columns. - let (inline_size, extra_inline_size) = match input.computed_inline_size { - Auto => { - if input.available_inline_size > geometry::max(cols_max, cap_min) { - if cols_max > cap_min { - table_wrapper.col_inline_sizes = col_pref_inline_sizes.clone(); - (cols_max, Au(0)) - } else { - (cap_min, cap_min - cols_min) - } - } else { - let max = if cols_min >= input.available_inline_size && cols_min >= cap_min { - table_wrapper.col_inline_sizes = col_min_inline_sizes.clone(); - cols_min - } else { - geometry::max(input.available_inline_size, cap_min) - }; - (max, max - cols_min) - } - }, - Specified(inline_size) => { - let max = if cols_min >= inline_size && cols_min >= cap_min { - table_wrapper.col_inline_sizes = col_min_inline_sizes.clone(); - cols_min - } else { - geometry::max(inline_size, cap_min) - }; - (max, max - cols_min) - } - }; - // The extra inline-size is distributed over the columns - if extra_inline_size > Au(0) { - let cell_len = table_wrapper.col_inline_sizes.len() as f64; - table_wrapper.col_inline_sizes = col_min_inline_sizes.iter().map(|inline_size| { - inline_size + extra_inline_size.scale_by(1.0 / cell_len) - }).collect(); - } - inline_size - } - }; - input.computed_inline_size = Specified(computed_inline_size); - input - } -} - -impl ISizeAndMarginsComputer for TableWrapper { - /// Solve the inline-size and margins constraints for this block flow. - fn solve_inline_size_constraints(&self, block: &mut BlockFlow, input: &ISizeConstraintInput) - -> ISizeConstraintSolution { - self.solve_block_inline_size_constraints(block, input) - } -} |