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97235d0bf7
This is needed for both bug 1357461 and bug 1273303, where I plan to add smarter invalidations than what we have now. Also, it's cleaner. Ideally I'll move this onto stylist, though that may require extra work to make it work fine for Servo, so for now let's just do the obvious thing.
105 lines
3.4 KiB
Rust
105 lines
3.4 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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//! A centralized set of stylesheets for a document.
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use arc_ptr_eq;
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use std::sync::Arc;
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use stylesheets::Stylesheet;
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/// The set of stylesheets effective for a given document.
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pub struct StylesheetSet {
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/// The actual list of all the stylesheets that apply to the given document.
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///
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/// This is only a list of top-level stylesheets, and as such it doesn't
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/// include recursive `@import` rules.
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stylesheets: Vec<Arc<Stylesheet>>,
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/// Whether the stylesheets list above has changed since the last restyle.
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dirty: bool,
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/// Has author style been disabled?
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author_style_disabled: bool,
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}
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impl StylesheetSet {
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/// Create a new empty StylesheetSet.
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pub fn new() -> Self {
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StylesheetSet {
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stylesheets: vec![],
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dirty: false,
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author_style_disabled: false,
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}
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}
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/// Returns whether author styles have been disabled for the current
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/// stylesheet set.
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pub fn author_style_disabled(&self) -> bool {
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self.author_style_disabled
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}
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fn remove_stylesheet_if_present(&mut self, sheet: &Arc<Stylesheet>) {
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self.stylesheets.retain(|x| !arc_ptr_eq(x, sheet));
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}
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/// Appends a new stylesheet to the current set.
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pub fn append_stylesheet(&mut self, sheet: &Arc<Stylesheet>) {
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self.remove_stylesheet_if_present(sheet);
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self.stylesheets.push(sheet.clone());
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self.dirty = true;
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}
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/// Prepend a new stylesheet to the current set.
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pub fn prepend_stylesheet(&mut self, sheet: &Arc<Stylesheet>) {
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self.remove_stylesheet_if_present(sheet);
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self.stylesheets.insert(0, sheet.clone());
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self.dirty = true;
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}
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/// Insert a given stylesheet before another stylesheet in the document.
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pub fn insert_stylesheet_before(&mut self,
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sheet: &Arc<Stylesheet>,
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before: &Arc<Stylesheet>) {
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self.remove_stylesheet_if_present(sheet);
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let index = self.stylesheets.iter().position(|x| {
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arc_ptr_eq(x, before)
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}).expect("`before` stylesheet not found");
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self.stylesheets.insert(index, sheet.clone());
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self.dirty = true;
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}
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/// Remove a given stylesheet from the set.
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pub fn remove_stylesheet(&mut self, sheet: &Arc<Stylesheet>) {
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self.remove_stylesheet_if_present(sheet);
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self.dirty = true;
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}
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/// Notes that the author style has been disabled for this document.
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pub fn set_author_style_disabled(&mut self, disabled: bool) {
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if self.author_style_disabled == disabled {
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return;
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}
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self.author_style_disabled = disabled;
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self.dirty = true;
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}
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/// Returns whether the given set has changed from the last flush.
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pub fn has_changed(&self) -> bool {
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self.dirty
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}
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/// Flush the current set, unmarking it as dirty.
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pub fn flush(&mut self) -> &[Arc<Stylesheet>] {
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self.dirty = false;
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&self.stylesheets
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}
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/// Mark the stylesheets as dirty, because something external may have
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/// invalidated it.
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///
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/// FIXME(emilio): Make this more granular.
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pub fn force_dirty(&mut self) {
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self.dirty = true;
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}
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}
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