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d12c6e7383
This patch puts in the initial framework for incremental reflow. Nodes' styles are no longer recalculated unless the node has changed. I've been hacking on the general problem of incremental reflow for the past couple weeks, and I've yet to get a full implementation that actually passes all the reftests + wikipedia + cnn. Therefore, I'm going to try to land the different parts of it one by one. This patch only does incremental style recalc, without incremental flow construction, inline-size bubbling, reflow, or display lists. Those will be coming in that order as I finish them. At least with this strategy, I can land a working version of incremental reflow, even if not yet complete. r? @pcwalton
81 lines
3.2 KiB
Rust
81 lines
3.2 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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use incremental::RestyleDamage;
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use util::LayoutDataAccess;
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use wrapper::ThreadSafeLayoutNode;
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use wrapper::{After, Before, Normal};
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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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pub trait NodeUtil {
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fn get_css_select_results<'a>(&'a self) -> &'a Arc<ComputedValues>;
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fn have_css_select_results(&self) -> bool;
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fn get_restyle_damage(self) -> RestyleDamage;
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fn set_restyle_damage(self, damage: RestyleDamage);
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}
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impl<'ln> NodeUtil for ThreadSafeLayoutNode<'ln> {
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/// Returns the style results for the given node. If CSS selector
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/// matching has not yet been performed, fails.
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#[inline]
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fn get_css_select_results<'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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/// Does this node have a computed style yet?
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fn have_css_select_results(&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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/// Get the description of how to account for recent style changes.
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/// This is a simple bitfield and fine to copy by value.
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fn get_restyle_damage(self) -> RestyleDamage {
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let layout_data_ref = self.borrow_layout_data();
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layout_data_ref
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.as_ref().unwrap()
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.data
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.restyle_damage
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}
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/// Set the restyle damage field.
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fn set_restyle_damage(self, damage: RestyleDamage) {
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let mut layout_data_ref = self.mutate_layout_data();
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match &mut *layout_data_ref {
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&Some(ref mut layout_data) => layout_data.data.restyle_damage = damage,
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_ => fail!("no layout data for this node"),
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}
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}
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}
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