servo/components/layout/table_caption.rs

/* 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 https://mozilla.org/MPL/2.0/. */

//! CSS table formatting contexts.

use std::fmt;

use app_units::Au;
use base::print_tree::PrintTree;
use euclid::default::Point2D;
use log::{debug, trace};
use style::logical_geometry::LogicalSize;
use style::properties::ComputedValues;

use crate::block::BlockFlow;
use crate::context::LayoutContext;
use crate::display_list::{
    DisplayListBuildState, StackingContextCollectionFlags, StackingContextCollectionState,
};
use crate::flow::{Flow, FlowClass, OpaqueFlow};
use crate::fragment::{Fragment, FragmentBorderBoxIterator, Overflow};

#[allow(unsafe_code)]
unsafe impl crate::flow::HasBaseFlow for TableCaptionFlow {}

/// A table formatting context.
#[repr(C)]
pub struct TableCaptionFlow {
    pub block_flow: BlockFlow,
}

impl TableCaptionFlow {
    pub fn from_fragment(fragment: Fragment) -> TableCaptionFlow {
        TableCaptionFlow {
            block_flow: BlockFlow::from_fragment(fragment),
        }
    }
}

impl Flow for TableCaptionFlow {
    fn class(&self) -> FlowClass {
        FlowClass::TableCaption
    }

    fn as_mut_block(&mut self) -> &mut BlockFlow {
        &mut self.block_flow
    }

    fn as_block(&self) -> &BlockFlow {
        &self.block_flow
    }

    fn bubble_inline_sizes(&mut self) {
        self.block_flow.bubble_inline_sizes();
    }

    fn assign_inline_sizes(&mut self, layout_context: &LayoutContext) {
        debug!(
            "assign_inline_sizes({}): assigning inline_size for flow",
            "table_caption"
        );
        trace!("TableCaptionFlow before assigning: {:?}", &self);

        self.block_flow.assign_inline_sizes(layout_context);

        trace!("TableCaptionFlow after assigning: {:?}", &self);
    }

    fn assign_block_size(&mut self, layout_context: &LayoutContext) {
        debug!("assign_block_size: assigning block_size for table_caption");
        trace!("TableCaptionFlow before assigning: {:?}", &self);

        self.block_flow.assign_block_size(layout_context);

        trace!("TableCaptionFlow after assigning: {:?}", &self);
    }

    fn compute_stacking_relative_position(&mut self, layout_context: &LayoutContext) {
        self.block_flow
            .compute_stacking_relative_position(layout_context)
    }

    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, state: &mut DisplayListBuildState) {
        debug!("build_display_list_table_caption: same process as block flow");
        self.block_flow.build_display_list(state);
    }

    fn collect_stacking_contexts(&mut self, state: &mut StackingContextCollectionState) {
        self.block_flow
            .collect_stacking_contexts_for_block(state, StackingContextCollectionFlags::empty());
    }

    fn repair_style(&mut self, new_style: &crate::ServoArc<ComputedValues>) {
        self.block_flow.repair_style(new_style)
    }

    fn compute_overflow(&self) -> Overflow {
        self.block_flow.compute_overflow()
    }

    fn contains_roots_of_absolute_flow_tree(&self) -> bool {
        self.block_flow.contains_roots_of_absolute_flow_tree()
    }

    fn is_absolute_containing_block(&self) -> bool {
        self.block_flow.is_absolute_containing_block()
    }

    fn generated_containing_block_size(&self, flow: OpaqueFlow) -> LogicalSize<Au> {
        self.block_flow.generated_containing_block_size(flow)
    }

    fn iterate_through_fragment_border_boxes(
        &self,
        iterator: &mut dyn FragmentBorderBoxIterator,
        level: i32,
        stacking_context_position: &Point2D<Au>,
    ) {
        self.block_flow.iterate_through_fragment_border_boxes(
            iterator,
            level,
            stacking_context_position,
        )
    }

    fn mutate_fragments(&mut self, mutator: &mut dyn FnMut(&mut Fragment)) {
        self.block_flow.mutate_fragments(mutator)
    }

    fn print_extra_flow_children(&self, print_tree: &mut PrintTree) {
        self.block_flow.print_extra_flow_children(print_tree);
    }
}

impl fmt::Debug for TableCaptionFlow {
    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
        write!(f, "TableCaptionFlow: {:?}", self.block_flow)
    }
}