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Add insertRule() and deleteRule() on CSSStyleSheet
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c4b7cc863e
commit
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5 changed files with 160 additions and 10 deletions
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@ -73,6 +73,12 @@ impl CSSRule {
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StyleCssRule::Viewport(s) => Root::upcast(CSSViewportRule::new(window, parent, s)),
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}
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}
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/// Sets owner sheet/rule to null
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pub fn disown(&self) {
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self.parent.set(None);
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// should set parent rule to None when we add parent rule support
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}
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}
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impl CSSRuleMethods for CSSRule {
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@ -2,14 +2,19 @@
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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 dom::bindings::cell::DOMRefCell;
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use dom::bindings::codegen::Bindings::CSSRuleListBinding;
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use dom::bindings::codegen::Bindings::CSSRuleListBinding::CSSRuleListMethods;
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use dom::bindings::codegen::Bindings::WindowBinding::WindowMethods;
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use dom::bindings::error::{Error, ErrorResult, Fallible};
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use dom::bindings::js::{JS, MutNullableHeap, Root};
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use dom::bindings::reflector::{Reflectable, Reflector, reflect_dom_object};
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use dom::cssrule::CSSRule;
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use dom::cssstylesheet::CSSStyleSheet;
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use dom::window::Window;
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use style::stylesheets::CssRules;
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use style::parser::ParserContextExtraData;
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use style::stylesheets::{CssRules, Origin};
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use style::stylesheets::CssRule as StyleCssRule;
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no_jsmanaged_fields!(CssRules);
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@ -19,7 +24,7 @@ pub struct CSSRuleList {
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sheet: JS<CSSStyleSheet>,
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#[ignore_heap_size_of = "Arc"]
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rules: CssRules,
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dom_rules: Vec<MutNullableHeap<JS<CSSRule>>>
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dom_rules: DOMRefCell<Vec<MutNullableHeap<JS<CSSRule>>>>
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}
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impl CSSRuleList {
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@ -30,7 +35,7 @@ impl CSSRuleList {
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reflector_: Reflector::new(),
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sheet: JS::from_ref(sheet),
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rules: rules,
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dom_rules: dom_rules,
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dom_rules: DOMRefCell::new(dom_rules),
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}
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}
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@ -40,12 +45,83 @@ impl CSSRuleList {
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window,
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CSSRuleListBinding::Wrap)
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}
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// https://drafts.csswg.org/cssom/#insert-a-css-rule
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pub fn insert_rule(&self, rule: &str, idx: u32) -> Fallible<u32> {
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/// Insert an item into a vector, appending if it is out of bounds
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fn insert<T>(vec: &mut Vec<T>, index: usize, item: T) {
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if index >= vec.len() {
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vec.push(item);
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} else {
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vec.insert(index, item);
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}
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}
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let global = self.global();
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let window = global.as_window();
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let doc = window.Document();
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let index = idx as usize;
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// Step 1, 2
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// XXXManishearth get url from correct location
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// XXXManishearth should we also store the namespace map?
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let new_rule = try!(StyleCssRule::from_str(&rule, Origin::Author,
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doc.url().clone(),
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ParserContextExtraData::default())
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.map_err(|_| Error::Syntax));
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{
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let rules = self.rules.0.read();
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// Step 3, 4
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if index > rules.len() {
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return Err(Error::IndexSize);
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}
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// XXXManishearth Step 5 (throw HierarchyRequestError in invalid situations)
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// Step 6
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if let StyleCssRule::Namespace(..) = new_rule {
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if !CssRules::only_ns_or_import(&rules) {
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return Err(Error::InvalidState);
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}
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}
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}
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insert(&mut self.rules.0.write(), index, new_rule.clone());
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let dom_rule = CSSRule::new_specific(&window, &self.sheet, new_rule);
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insert(&mut self.dom_rules.borrow_mut(),
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index, MutNullableHeap::new(Some(&*dom_rule)));
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Ok((idx))
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}
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// https://drafts.csswg.org/cssom/#remove-a-css-rule
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pub fn remove_rule(&self, index: u32) -> ErrorResult {
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let index = index as usize;
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{
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let rules = self.rules.0.read();
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if index >= rules.len() {
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return Err(Error::IndexSize);
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}
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let ref rule = rules[index];
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if let StyleCssRule::Namespace(..) = *rule {
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if !CssRules::only_ns_or_import(&rules) {
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return Err(Error::InvalidState);
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}
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}
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}
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let mut dom_rules = self.dom_rules.borrow_mut();
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self.rules.0.write().remove(index);
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dom_rules[index].get().map(|r| r.disown());
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dom_rules.remove(index);
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Ok(())
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}
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}
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impl CSSRuleListMethods for CSSRuleList {
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// https://drafts.csswg.org/cssom/#ref-for-dom-cssrulelist-item-1
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fn Item(&self, idx: u32) -> Option<Root<CSSRule>> {
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self.dom_rules.get(idx as usize).map(|rule| {
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self.dom_rules.borrow().get(idx as usize).map(|rule| {
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rule.or_init(|| {
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CSSRule::new_specific(self.global().as_window(),
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&self.sheet,
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@ -56,7 +132,7 @@ impl CSSRuleListMethods for CSSRuleList {
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// https://drafts.csswg.org/cssom/#dom-cssrulelist-length
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fn Length(&self) -> u32 {
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self.dom_rules.len() as u32
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self.dom_rules.borrow().len() as u32
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}
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// check-tidy: no specs after this line
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@ -4,6 +4,7 @@
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use dom::bindings::codegen::Bindings::CSSStyleSheetBinding;
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use dom::bindings::codegen::Bindings::CSSStyleSheetBinding::CSSStyleSheetMethods;
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use dom::bindings::error::{ErrorResult, Fallible};
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use dom::bindings::js::{JS, Root, MutNullableHeap};
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use dom::bindings::reflector::{reflect_dom_object, Reflectable};
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use dom::bindings::str::DOMString;
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@ -40,12 +41,31 @@ impl CSSStyleSheet {
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window,
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CSSStyleSheetBinding::Wrap)
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}
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fn rulelist(&self) -> Root<CSSRuleList> {
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self.rulelist.or_init(|| CSSRuleList::new(self.global().as_window(),
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self,
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self.style_stylesheet.rules.clone()))
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}
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}
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impl CSSStyleSheetMethods for CSSStyleSheet {
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// https://drafts.csswg.org/cssom/#dom-cssstylesheet-cssrules
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fn CssRules(&self) -> Root<CSSRuleList> {
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self.rulelist.or_init(|| CSSRuleList::new(self.global().as_window(), self, self.style_stylesheet.rules.clone()))
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// XXXManishearth check origin clean flag
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self.rulelist()
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}
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// https://drafts.csswg.org/cssom/#dom-cssstylesheet-insertrule
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fn InsertRule(&self, rule: DOMString, index: u32) -> Fallible<u32> {
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// XXXManishearth check origin clean flag
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self.rulelist().insert_rule(&rule, index)
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}
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// https://drafts.csswg.org/cssom/#dom-cssstylesheet-deleterule
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fn DeleteRule(&self, index: u32) -> ErrorResult {
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// XXXManishearth check origin clean flag
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self.rulelist().remove_rule(index)
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}
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}
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@ -7,6 +7,6 @@
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interface CSSStyleSheet : StyleSheet {
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// readonly attribute CSSRule? ownerRule;
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[SameObject] readonly attribute CSSRuleList cssRules;
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// unsigned long insertRule(DOMString rule, unsigned long index);
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// void deleteRule(unsigned long index);
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[Throws] unsigned long insertRule(DOMString rule, unsigned long index);
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[Throws] void deleteRule(unsigned long index);
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};
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