mirror of
https://github.com/servo/servo.git
synced 2025-06-13 02:44:29 +00:00
90 lines
3.5 KiB
Rust
90 lines
3.5 KiB
Rust
/* 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 incremental::RestyleDamage;
|
|
use util::LayoutDataAccess;
|
|
use wrapper::{TLayoutNode, 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 get_restyle_damage(&self) -> RestyleDamage;
|
|
fn set_restyle_damage(&self, damage: RestyleDamage);
|
|
}
|
|
|
|
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()
|
|
}
|
|
|
|
/// Get the description of how to account for recent style changes.
|
|
/// This is a simple bitfield and fine to copy by value.
|
|
fn get_restyle_damage(&self) -> RestyleDamage {
|
|
// For DOM elements, if we haven't computed damage yet, assume the worst.
|
|
// Other nodes don't have styles.
|
|
let default = if self.node_is_element() {
|
|
RestyleDamage::all()
|
|
} else {
|
|
RestyleDamage::empty()
|
|
};
|
|
|
|
let layout_data_ref = self.borrow_layout_data();
|
|
layout_data_ref
|
|
.as_ref().unwrap()
|
|
.data
|
|
.restyle_damage
|
|
.unwrap_or(default)
|
|
}
|
|
|
|
/// Set the restyle damage field.
|
|
fn set_restyle_damage(&self, damage: RestyleDamage) {
|
|
let mut layout_data_ref = self.mutate_layout_data();
|
|
match &mut *layout_data_ref {
|
|
&Some(ref mut layout_data) => layout_data.data.restyle_damage = Some(damage),
|
|
_ => fail!("no layout data for this node"),
|
|
}
|
|
}
|
|
}
|