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https://github.com/servo/servo.git
synced 2025-08-02 12:10:29 +01:00
Implement something like CSS value serialization. Fetch actual inline style declarations from owning elements.
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2e14b653bf
commit
505e1855a3
8 changed files with 375 additions and 55 deletions
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@ -10,6 +10,7 @@ use dom::bindings::global;
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use dom::bindings::js::{JSRef, Temporary};
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use dom::bindings::utils::{Reflectable, Reflector, reflect_dom_object};
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use dom::cssstyledeclaration::CSSStyleDeclaration;
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use dom::htmlelement::HTMLElement;
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use dom::window::Window;
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use servo_util::str::DOMString;
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@ -37,15 +38,15 @@ macro_rules! css_setter(
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)
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impl CSS2Properties {
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fn new_inherited() -> CSS2Properties {
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fn new_inherited(owner: JSRef<HTMLElement>) -> CSS2Properties {
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CSS2Properties {
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cssstyledeclaration: CSSStyleDeclaration::new_inherited(),
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cssstyledeclaration: CSSStyleDeclaration::new_inherited(Some(owner)),
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}
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}
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pub fn new(global: &JSRef<Window>) -> Temporary<CSS2Properties> {
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reflect_dom_object(box CSS2Properties::new_inherited(),
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global::Window(*global),
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pub fn new(global: JSRef<Window>, owner: JSRef<HTMLElement>) -> Temporary<CSS2Properties> {
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reflect_dom_object(box CSS2Properties::new_inherited(owner),
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global::Window(global),
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CSS2PropertiesBinding::Wrap)
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}
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}
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@ -3,55 +3,67 @@
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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use dom::bindings::codegen::Bindings::CSSStyleDeclarationBinding::CSSStyleDeclarationMethods;
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use dom::bindings::codegen::InheritTypes::ElementCast;
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use dom::bindings::error::{ErrorResult, Fallible};
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use dom::bindings::js::JSRef;
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use dom::bindings::js::{JS, JSRef, OptionalRootedRootable};
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use dom::bindings::utils::{Reflectable, Reflector};
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use dom::element::{Element, ElementHelpers};
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use dom::htmlelement::HTMLElement;
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use servo_util::str::DOMString;
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use string_cache::atom::Atom;
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use style::longhands_from_shorthand;
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use style::PropertyDeclaration;
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use std::ascii::AsciiExt;
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#[dom_struct]
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pub struct CSSStyleDeclaration {
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reflector_: Reflector,
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owner: Option<JS<HTMLElement>>,
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}
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fn get_longhands_from_shorthand(shorthand: &Atom) -> Vec<Atom> {
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match shorthand.as_slice() {
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"background" =>
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vec!(Atom::from_slice("background-color"), Atom::from_slice("background-position"),
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Atom::from_slice("background-attachment"), Atom::from_slice("background-image"),
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Atom::from_slice("background-repeat")),
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_ => vec!(),
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}
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}
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type Declaration = int;
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fn serialize_list(property: String, list: Vec<Declaration>) -> DOMString {
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let mut result = property;
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result.push_str(": ");
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fn serialize_list(list: &Vec<PropertyDeclaration>) -> DOMString {
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let mut result = String::new();
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for declaration in list.iter() {
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result.push_str(serialize_declaration(declaration).as_slice());
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result.push_str(serialize_value(declaration).as_slice());
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result.push_str(" ");
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}
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result
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}
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fn serialize_declaration(_declaration: &Declaration) -> DOMString {
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"".to_string()
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}
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fn get_declaration(_property: &Atom) -> Option<Declaration> {
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None
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fn serialize_value(declaration: &PropertyDeclaration) -> DOMString {
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declaration.value().unwrap()
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}
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impl CSSStyleDeclaration {
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pub fn new_inherited() -> CSSStyleDeclaration {
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pub fn new_inherited(owner: Option<JSRef<HTMLElement>>) -> CSSStyleDeclaration {
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CSSStyleDeclaration {
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reflector_: Reflector::new()
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reflector_: Reflector::new(),
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owner: owner.map(|owner| JS::from_rooted(owner)),
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}
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}
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}
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trait PrivateCSSStyleDeclarationHelpers {
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fn get_declaration(self, property: &Atom) -> Option<PropertyDeclaration>;
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}
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impl<'a> PrivateCSSStyleDeclarationHelpers for JSRef<'a, CSSStyleDeclaration> {
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fn get_declaration(self, property: &Atom) -> Option<PropertyDeclaration> {
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self.owner.root().and_then(|owner| {
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let element: JSRef<Element> = ElementCast::from_ref(*owner);
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let inline_declarations = element.style_attribute().borrow();
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inline_declarations.as_ref().and_then(|declarations| {
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for declaration in declarations.normal.iter().chain(declarations.important.iter()) {
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if declaration.matches(property.as_slice()) {
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return Some(declaration.clone());
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}
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}
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None
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})
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})
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}
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}
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impl<'a> CSSStyleDeclarationMethods for JSRef<'a, CSSStyleDeclaration> {
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fn CssText(self) -> DOMString {
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"".to_string()
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@ -75,39 +87,38 @@ impl<'a> CSSStyleDeclarationMethods for JSRef<'a, CSSStyleDeclaration> {
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let property = Atom::from_slice(property.as_slice().to_ascii_lower().as_slice());
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// 2. If property is a shorthand property, then follow these substeps:
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let longhand_properties = get_longhands_from_shorthand(&property);
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if !longhand_properties.is_empty() {
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let longhand_properties = longhands_from_shorthand(property.as_slice());
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if longhand_properties.is_some() {
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// 1. Let list be a new empty array.
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let mut list = vec!();
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// 2. For each longhand property longhand that property maps to, in canonical order,
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// follow these substeps:
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for longhand in longhand_properties.iter() {
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for longhand in longhand_properties.unwrap().iter() {
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// 1. If longhand is a case-sensitive match for a property name of a
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// CSS declaration in the declarations, let declaration be that CSS
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// declaration, or null otherwise.
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let declaration = get_declaration(longhand);
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let declaration = self.get_declaration(&Atom::from_slice(longhand.as_slice()));
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// 2. If declaration is null, return the empty string and terminate these
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// steps.
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if declaration.is_none() {
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return "".to_string();
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//XXXjdm ambiguous? this suggests that if we're missing a longhand we return nothing at all.
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if declaration.is_some() {
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// 3. Append the declaration to list.
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list.push(declaration.unwrap());
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}
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// 3. Append the declaration to list.
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list.push(declaration.unwrap());
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}
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// 3. Return the serialization of list and terminate these steps.
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return serialize_list(property.as_slice().to_string(), list);
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return serialize_list(&list);
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}
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// 3. If property is a case-sensitive match for a property name of a CSS declaration
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// in the declarations, return the result of invoking serialize a CSS value of that
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// declaration and terminate these steps.
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// 4. Return the empty string.
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let declaration = get_declaration(&property);
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declaration.as_ref().map(|declaration| serialize_declaration(declaration))
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let declaration = self.get_declaration(&property);
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declaration.as_ref().map(|declaration| serialize_value(declaration))
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.unwrap_or("".to_string())
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}
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@ -73,8 +73,8 @@ impl<'a> PrivateHTMLElementHelpers for JSRef<'a, HTMLElement> {
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impl<'a> HTMLElementMethods for JSRef<'a, HTMLElement> {
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fn Style(self) -> Temporary<CSSStyleDeclaration> {
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if self.style_decl.get().is_none() {
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let global = window_from_node(self);
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let style_props = CSS2Properties::new(&*global.root()).root();
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let global = window_from_node(self).root();
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let style_props = CSS2Properties::new(*global, self).root();
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let style_decl: JSRef<CSSStyleDeclaration> = CSSStyleDeclarationCast::from_ref(*style_props);
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self.style_decl.assign(Some(style_decl));
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}
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@ -194,7 +194,7 @@ pub struct SharedLayoutData {
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/// Encapsulates the abstract layout data.
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pub struct LayoutData {
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chan: Option<LayoutChan>,
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_shared_data: SharedLayoutData,
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pub shared_data: SharedLayoutData,
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_data: *const (),
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}
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