Remove unused code from gfx and layout crates

components/layout/flow.rs

@@ -35,11 +35,9 @@ use crate::flow_list::{FlowList, FlowListIterator, MutFlowListIterator};
 use crate::flow_ref::{FlowRef, WeakFlowRef};
 use crate::fragment::{CoordinateSystem, Fragment, FragmentBorderBoxIterator, Overflow};
 use crate::inline::InlineFlow;
-use crate::model::{CollapsibleMargins, IntrinsicISizes, MarginCollapseInfo};
-use crate::multicol::MulticolFlow;
+use crate::model::{CollapsibleMargins, IntrinsicISizes};
 use crate::parallel::FlowParallelInfo;
 use crate::table::TableFlow;
-use crate::table_caption::TableCaptionFlow;
 use crate::table_cell::TableCellFlow;
 use crate::table_colgroup::TableColGroupFlow;
 use crate::table_row::TableRowFlow;
@@ -146,12 +144,6 @@ pub trait Flow: HasBaseFlow + fmt::Debug + Sync + Send + 'static {
         panic!("called as_mut_inline() on a non-inline flow")
     }
 
-    /// If this is a table wrapper flow, returns the underlying object, borrowed mutably. Fails
-    /// otherwise.
-    fn as_mut_table_wrapper(&mut self) -> &mut TableWrapperFlow {
-        panic!("called as_mut_table_wrapper() on a non-tablewrapper flow")
-    }
-
     /// If this is a table wrapper flow, returns the underlying object. Fails otherwise.
     fn as_table_wrapper(&self) -> &TableWrapperFlow {
         panic!("called as_table_wrapper() on a non-tablewrapper flow")
@@ -201,24 +193,12 @@ pub trait Flow: HasBaseFlow + fmt::Debug + Sync + Send + 'static {
         panic!("called as_table_row() on a non-tablerow flow")
     }
 
-    /// If this is a table cell flow, returns the underlying object, borrowed mutably. Fails
-    /// otherwise.
-    fn as_mut_table_caption(&mut self) -> &mut TableCaptionFlow {
-        panic!("called as_mut_table_caption() on a non-tablecaption flow")
-    }
-
     /// If this is a table cell flow, returns the underlying object, borrowed mutably. Fails
     /// otherwise.
     fn as_mut_table_cell(&mut self) -> &mut TableCellFlow {
         panic!("called as_mut_table_cell() on a non-tablecell flow")
     }
 
-    /// If this is a multicol flow, returns the underlying object, borrowed mutably. Fails
-    /// otherwise.
-    fn as_mut_multicol(&mut self) -> &mut MulticolFlow {
-        panic!("called as_mut_multicol() on a non-multicol flow")
-    }
-
     /// If this is a table cell flow, returns the underlying object. Fails otherwise.
     fn as_table_cell(&self) -> &TableCellFlow {
         panic!("called as_table_cell() on a non-tablecell flow")
@@ -432,14 +412,6 @@ pub trait Flow: HasBaseFlow + fmt::Debug + Sync + Send + 'static {
     /// Mutably iterates through fragments in this flow.
     fn mutate_fragments(&mut self, mutator: &mut dyn FnMut(&mut Fragment));
 
-    fn compute_collapsible_block_start_margin(
-        &mut self,
-        _layout_context: &mut LayoutContext,
-        _margin_collapse_info: &mut MarginCollapseInfo,
-    ) {
-        // The default implementation is a no-op.
-    }
-
     /// Marks this flow as the root flow. The default implementation is a no-op.
     fn mark_as_root(&mut self) {
         debug!("called mark_as_root() on a flow of type {:?}", self.class());
@@ -530,9 +502,6 @@ pub trait ImmutableFlowUtils {
     /// Returns true if this flow is a table caption flow.
     fn is_table_caption(self) -> bool;
 
-    /// Returns true if this flow is a proper table child.
-    fn is_proper_table_child(self) -> bool;
-
     /// Returns true if this flow is a table row flow.
     fn is_table_row(self) -> bool;
 
@@ -545,18 +514,9 @@ pub trait ImmutableFlowUtils {
     /// Returns true if this flow is a table rowgroup flow.
     fn is_table_rowgroup(self) -> bool;
 
-    /// Returns true if this flow is one of table-related flows.
-    fn is_table_kind(self) -> bool;
-
-    /// Returns true if this flow has no children.
-    fn is_leaf(self) -> bool;
-
     /// Returns the number of children that this flow possesses.
     fn child_count(self) -> usize;
 
-    /// Return true if this flow is a Block Container.
-    fn is_block_container(self) -> bool;
-
     /// Returns true if this flow is a block flow.
     fn is_block_flow(self) -> bool;
 
@@ -1205,10 +1165,6 @@ impl BaseFlow {
         p as usize
     }
 
-    pub fn flow_id(&self) -> usize {
-        return self as *const BaseFlow as usize;
-    }
-
     pub fn collect_stacking_contexts_for_children(
         &mut self,
         state: &mut StackingContextCollectionState,
@@ -1252,19 +1208,6 @@ impl<'a> ImmutableFlowUtils for &'a dyn Flow {
         self.class().is_block_like()
     }
 
-    /// Returns true if this flow is a proper table child.
-    /// 'Proper table child' is defined as table-row flow, table-rowgroup flow,
-    /// table-column-group flow, or table-caption flow.
-    fn is_proper_table_child(self) -> bool {
-        match self.class() {
-            FlowClass::TableRow |
-            FlowClass::TableRowGroup |
-            FlowClass::TableColGroup |
-            FlowClass::TableCaption => true,
-            _ => false,
-        }
-    }
-
     /// Returns true if this flow is a table row flow.
     fn is_table_row(self) -> bool {
         match self.class() {
@@ -1313,47 +1256,11 @@ impl<'a> ImmutableFlowUtils for &'a dyn Flow {
         }
     }
 
-    /// Returns true if this flow is one of table-related flows.
-    fn is_table_kind(self) -> bool {
-        match self.class() {
-            FlowClass::TableWrapper |
-            FlowClass::Table |
-            FlowClass::TableColGroup |
-            FlowClass::TableRowGroup |
-            FlowClass::TableRow |
-            FlowClass::TableCaption |
-            FlowClass::TableCell => true,
-            _ => false,
-        }
-    }
-
-    /// Returns true if this flow has no children.
-    fn is_leaf(self) -> bool {
-        self.base().children.is_empty()
-    }
-
     /// Returns the number of children that this flow possesses.
     fn child_count(self) -> usize {
         self.base().children.len()
     }
 
-    /// Return true if this flow is a Block Container.
-    ///
-    /// Except for table fragments and replaced elements, block-level fragments (`BlockFlow`) are
-    /// also block container fragments.
-    /// Non-replaced inline blocks and non-replaced table cells are also block
-    /// containers.
-    fn is_block_container(self) -> bool {
-        match self.class() {
-            // TODO: Change this when inline-blocks are supported.
-            FlowClass::Block | FlowClass::TableCaption | FlowClass::TableCell => {
-                // FIXME: Actually check the type of the node
-                self.child_count() != 0
-            },
-            _ => false,
-        }
-    }
-
     /// Returns true if this flow is a block flow.
     fn is_block_flow(self) -> bool {
         match self.class() {