1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
|
/* 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 https://mozilla.org/MPL/2.0/. */
//! Gecko-specific bits for the styling DOM traversal.
use crate::context::{SharedStyleContext, StyleContext};
use crate::dom::{TElement, TNode};
use crate::gecko::wrapper::{GeckoElement, GeckoNode};
use crate::traversal::{recalc_style_at, DomTraversal, PerLevelTraversalData};
/// This is the simple struct that Gecko uses to encapsulate a DOM traversal for
/// styling.
pub struct RecalcStyleOnly<'a> {
shared: SharedStyleContext<'a>,
}
impl<'a> RecalcStyleOnly<'a> {
/// Create a `RecalcStyleOnly` traversal from a `SharedStyleContext`.
pub fn new(shared: SharedStyleContext<'a>) -> Self {
RecalcStyleOnly { shared: shared }
}
}
impl<'recalc, 'le> DomTraversal<GeckoElement<'le>> for RecalcStyleOnly<'recalc> {
fn process_preorder<F>(
&self,
traversal_data: &PerLevelTraversalData,
context: &mut StyleContext<GeckoElement<'le>>,
node: GeckoNode<'le>,
note_child: F,
) where
F: FnMut(GeckoNode<'le>),
{
if let Some(el) = node.as_element() {
let mut data = unsafe { el.ensure_data() };
recalc_style_at(self, traversal_data, context, el, &mut data, note_child);
}
}
fn process_postorder(&self, _: &mut StyleContext<GeckoElement<'le>>, _: GeckoNode<'le>) {
unreachable!();
}
/// We don't use the post-order traversal for anything.
fn needs_postorder_traversal() -> bool {
false
}
fn shared_context(&self) -> &SharedStyleContext {
&self.shared
}
}
|
