1 files changed, 88 insertions, 0 deletions
diff --git a/components/layout/table_colgroup.rs b/components/layout/table_colgroup.rs
new file mode 100644
index 00000000000..270f55970b2
--- /dev/null
+++ b/components/layout/table_colgroup.rs
@@ -0,0 +1,88 @@
+/* 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 context::LayoutContext;
+use flow::{BaseFlow, TableColGroupFlowClass, FlowClass, Flow};
+use fragment::{Fragment, TableColumnFragment};
+use model::{MaybeAuto};
+use wrapper::ThreadSafeLayoutNode;
+
+use servo_util::geometry::Au;
+use std::fmt;
+
+/// A table formatting context.
+pub struct TableColGroupFlow {
+    /// Data common to all flows.
+    pub base: BaseFlow,
+
+    /// The associated fragment.
+    pub fragment: Option<Fragment>,
+
+    /// The table column fragments
+    pub cols: Vec<Fragment>,
+
+    /// The specified inline-sizes of table columns
+    pub inline_sizes: Vec<Au>,
+}
+
+impl TableColGroupFlow {
+    pub fn from_node_and_fragments(node: &ThreadSafeLayoutNode,
+                                   fragment: Fragment,
+                                   fragments: Vec<Fragment>) -> TableColGroupFlow {
+        TableColGroupFlow {
+            base: BaseFlow::new((*node).clone()),
+            fragment: Some(fragment),
+            cols: fragments,
+            inline_sizes: vec!(),
+        }
+    }
+}
+
+impl Flow for TableColGroupFlow {
+    fn class(&self) -> FlowClass {
+        TableColGroupFlowClass
+    }
+
+    fn as_table_colgroup<'a>(&'a mut self) -> &'a mut TableColGroupFlow {
+        self
+    }
+
+    fn bubble_inline_sizes(&mut self, _: &LayoutContext) {
+        for fragment in self.cols.iter() {
+            // get the specified value from inline-size property
+            let inline_size = MaybeAuto::from_style(fragment.style().content_inline_size(),
+                                              Au::new(0)).specified_or_zero();
+
+            let span: int = match fragment.specific {
+                TableColumnFragment(col_fragment) => col_fragment.span.unwrap_or(1),
+                _ => fail!("Other fragment come out in TableColGroupFlow. {:?}", fragment.specific)
+            };
+            for _ in range(0, span) {
+                self.inline_sizes.push(inline_size);
+            }
+        }
+    }
+
+    /// Table column inline-sizes are assigned in table flow and propagated to table row or rowgroup flow.
+    /// Therefore, table colgroup flow does not need to assign its inline-size.
+    fn assign_inline_sizes(&mut self, _ctx: &LayoutContext) {
+    }
+
+    /// Table column do not have block-size.
+    fn assign_block_size(&mut self, _ctx: &LayoutContext) {
+    }
+}
+
+impl fmt::Show for TableColGroupFlow {
+    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+        match self.fragment {
+            Some(ref rb) => write!(f, "TableColGroupFlow: {}", rb),
+            None => write!(f, "TableColGroupFlow"),
+        }
+    }
+}