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10f1ed5e31
Additionally, this patch cleans up some miscellaneous formatting issues and refactors files in `layout/css/` somewhat to eliminate needless levels of indirection. It also fixes our handling of presentational hints that only apply if border is nonzero.
76 lines
2.9 KiB
Rust
76 lines
2.9 KiB
Rust
/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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//! Style retrieval from DOM elements.
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use wrapper::{After, Before, Normal, ThreadSafeLayoutNode};
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use std::mem;
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use style::ComputedValues;
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use sync::Arc;
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/// Node mixin providing `style` method that returns a `NodeStyle`
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pub trait StyledNode {
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/// Returns the style results for the given node. If CSS selector matching has not yet been
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/// performed, fails.
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fn style<'a>(&'a self) -> &'a Arc<ComputedValues>;
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/// Does this node have a computed style yet?
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fn has_style(&self) -> bool;
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/// Removes the style from this node.
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fn unstyle(self);
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}
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impl<'ln> StyledNode for ThreadSafeLayoutNode<'ln> {
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#[inline]
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fn style<'a>(&'a self) -> &'a Arc<ComputedValues> {
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unsafe {
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let layout_data_ref = self.borrow_layout_data();
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match self.get_pseudo_element_type() {
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Before(_) => {
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mem::transmute(layout_data_ref.as_ref()
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.unwrap()
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.data
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.before_style
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.as_ref()
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.unwrap())
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}
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After(_) => {
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mem::transmute(layout_data_ref.as_ref()
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.unwrap()
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.data
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.after_style
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.as_ref()
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.unwrap())
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}
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Normal => {
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mem::transmute(layout_data_ref.as_ref()
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.unwrap()
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.shared_data
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.style
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.as_ref()
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.unwrap())
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}
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}
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}
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}
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fn has_style(&self) -> bool {
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let layout_data_ref = self.borrow_layout_data();
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layout_data_ref.as_ref().unwrap().shared_data.style.is_some()
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}
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fn unstyle(self) {
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let mut layout_data_ref = self.mutate_layout_data();
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let layout_data = layout_data_ref.as_mut().expect("no layout data");
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let style =
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match self.get_pseudo_element_type() {
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Before(_) => &mut layout_data.data.before_style,
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After (_) => &mut layout_data.data.after_style,
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Normal => &mut layout_data.shared_data.style,
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};
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*style = None;
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}
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}
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