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/* 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/. */
//! Code for managing the layout data in the DOM.
use util::{PrivateLayoutData, LayoutDataAccess, LayoutDataWrapper};
use wrapper::LayoutNode;
use script::dom::node::SharedLayoutData;
use script::layout_interface::LayoutChan;
/// Functionality useful for querying the layout-specific data on DOM nodes.
pub trait LayoutAuxMethods {
fn initialize_layout_data(&self, chan: LayoutChan);
fn initialize_style_for_subtree(&self, chan: LayoutChan);
}
impl<'ln> LayoutAuxMethods for LayoutNode<'ln> {
/// Resets layout data and styles for the node.
///
/// FIXME(pcwalton): Do this as part of fragment building instead of in a traversal.
fn initialize_layout_data(&self, chan: LayoutChan) {
let mut layout_data_ref = self.mutate_layout_data();
match *layout_data_ref {
None => {
*layout_data_ref = Some(LayoutDataWrapper {
chan: Some(chan),
shared_data: SharedLayoutData { style: None },
data: box PrivateLayoutData::new(),
});
}
Some(_) => {}
}
}
/// Resets layout data and styles for a Node tree.
///
/// FIXME(pcwalton): Do this as part of fragment building instead of in a traversal.
fn initialize_style_for_subtree(&self, chan: LayoutChan) {
for n in self.traverse_preorder() {
n.initialize_layout_data(chan.clone());
}
}
}
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