Cargoify servo

components/layout/table_cell.rs

@@ -0,0 +1,121 @@
+/* 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 context::LayoutContext;
+use flow::{TableCellFlowClass, FlowClass, Flow};
+use fragment::Fragment;
+use model::{MaybeAuto};
+use table::InternalTable;
+use wrapper::ThreadSafeLayoutNode;
+
+use servo_util::geometry::Au;
+use std::fmt;
+
+/// A table formatting context.
+pub struct TableCellFlow {
+    /// Data common to all flows.
+    pub block_flow: BlockFlow,
+}
+
+impl TableCellFlow {
+    pub fn from_node_and_fragment(node: &ThreadSafeLayoutNode, fragment: Fragment) -> TableCellFlow {
+        TableCellFlow {
+            block_flow: BlockFlow::from_node_and_fragment(node, fragment)
+        }
+    }
+
+    pub fn fragment<'a>(&'a mut self) -> &'a Fragment {
+        &self.block_flow.fragment
+    }
+
+    pub fn mut_fragment<'a>(&'a mut self) -> &'a mut Fragment {
+        &mut self.block_flow.fragment
+    }
+
+    /// Assign block-size for table-cell flow.
+    ///
+    /// TODO(#2015, 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_cell_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_cell(&mut self, layout_context: &LayoutContext) {
+        debug!("build_display_list_table: same process as block flow");
+        self.block_flow.build_display_list_block(layout_context)
+    }
+}
+
+impl Flow for TableCellFlow {
+    fn class(&self) -> FlowClass {
+        TableCellFlowClass
+    }
+
+    fn as_table_cell<'a>(&'a mut self) -> &'a mut TableCellFlow {
+        self
+    }
+
+    fn as_block<'a>(&'a mut self) -> &'a mut BlockFlow {
+        &mut self.block_flow
+    }
+
+    /// Minimum/preferred inline-sizes set by this function are used in automatic table layout calculation.
+    fn bubble_inline_sizes(&mut self, ctx: &LayoutContext) {
+        self.block_flow.bubble_inline_sizes(ctx);
+        let specified_inline_size = MaybeAuto::from_style(self.block_flow.fragment.style().content_inline_size(),
+                                                    Au::new(0)).specified_or_zero();
+        if self.block_flow.base.intrinsic_inline_sizes.minimum_inline_size < specified_inline_size {
+            self.block_flow.base.intrinsic_inline_sizes.minimum_inline_size = specified_inline_size;
+        }
+        if self.block_flow.base.intrinsic_inline_sizes.preferred_inline_size <
+            self.block_flow.base.intrinsic_inline_sizes.minimum_inline_size {
+            self.block_flow.base.intrinsic_inline_sizes.preferred_inline_size =
+                self.block_flow.base.intrinsic_inline_sizes.minimum_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 table row.
+    fn assign_inline_sizes(&mut self, ctx: &LayoutContext) {
+        debug!("assign_inline_sizes({}): assigning inline_size for flow", "table_cell");
+
+        // The position was set to the column inline-size by the parent flow, table row flow.
+        let containing_block_inline_size = self.block_flow.base.position.size.inline;
+
+        let inline_size_computer = InternalTable;
+        inline_size_computer.compute_used_inline_size(&mut self.block_flow, ctx, containing_block_inline_size);
+
+        let inline_start_content_edge = self.block_flow.fragment.border_box.start.i +
+            self.block_flow.fragment.border_padding.inline_start;
+        let padding_and_borders = self.block_flow.fragment.border_padding.inline_start_end();
+        let content_inline_size = self.block_flow.fragment.border_box.size.inline - padding_and_borders;
+
+        self.block_flow.propagate_assigned_inline_size_to_children(inline_start_content_edge,
+                                                             content_inline_size,
+                                                             None);
+    }
+
+    fn assign_block_size<'a>(&mut self, ctx: &'a LayoutContext<'a>) {
+        debug!("assign_block_size: assigning block_size for table_cell");
+        self.assign_block_size_table_cell_base(ctx);
+    }
+
+    fn compute_absolute_position(&mut self) {
+        self.block_flow.compute_absolute_position()
+    }
+}
+
+impl fmt::Show for TableCellFlow {
+    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+        write!(f, "TableCellFlow: {}", self.block_flow)
+    }
+}