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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/. */
use util::LayoutDataAccess;
use wrapper::ThreadSafeLayoutNode;
use wrapper::{After, Before, Normal};
use std::mem;
use style::ComputedValues;
use sync::Arc;
pub trait NodeUtil {
fn get_css_select_results<'a>(&'a self) -> &'a Arc<ComputedValues>;
fn have_css_select_results(&self) -> bool;
fn remove_css_select_results(self);
}
impl<'ln> NodeUtil for ThreadSafeLayoutNode<'ln> {
/// Returns the style results for the given node. If CSS selector
/// matching has not yet been performed, fails.
#[inline]
fn get_css_select_results<'a>(&'a self) -> &'a Arc<ComputedValues> {
unsafe {
let layout_data_ref = self.borrow_layout_data();
match self.get_pseudo_element_type() {
Before(_) => {
mem::transmute(layout_data_ref.as_ref()
.unwrap()
.data
.before_style
.as_ref()
.unwrap())
}
After(_) => {
mem::transmute(layout_data_ref.as_ref()
.unwrap()
.data
.after_style
.as_ref()
.unwrap())
}
Normal => {
mem::transmute(layout_data_ref.as_ref()
.unwrap()
.shared_data
.style
.as_ref()
.unwrap())
}
}
}
}
/// Does this node have a computed style yet?
fn have_css_select_results(&self) -> bool {
let layout_data_ref = self.borrow_layout_data();
layout_data_ref.as_ref().unwrap().shared_data.style.is_some()
}
fn remove_css_select_results(self) {
let mut layout_data_ref = self.mutate_layout_data();
let layout_data = layout_data_ref.as_mut().expect("no layout data");
let style =
match self.get_pseudo_element_type() {
Before(_) => &mut layout_data.data.before_style,
After (_) => &mut layout_data.data.after_style,
Normal => &mut layout_data.shared_data.style,
};
*style = None;
}
}
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