Update rust-selectors

This commits updates rust-selectors to use the generic parser, and as
such it moves the element state into the style crate.

components/style/selector_impl.rs

@@ -0,0 +1,91 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+use element_state::ElementState;
+use selectors::parser::{ParserContext, SelectorImpl};
+
+#[derive(Clone, Debug, PartialEq, HeapSizeOf)]
+pub enum PseudoElement {
+    Before,
+    After,
+}
+
+#[derive(Clone, Debug, PartialEq, HeapSizeOf)]
+pub enum NonTSPseudoClass {
+    AnyLink,
+    Link,
+    Visited,
+    Active,
+    Focus,
+    Hover,
+    Enabled,
+    Disabled,
+    Checked,
+    Indeterminate,
+    ServoNonZeroBorder,
+}
+
+impl NonTSPseudoClass {
+    pub fn state_flag(&self) -> ElementState {
+        use element_state::*;
+        use self::NonTSPseudoClass::*;
+        match *self {
+            Active => IN_ACTIVE_STATE,
+            Focus => IN_FOCUS_STATE,
+            Hover => IN_HOVER_STATE,
+            Enabled => IN_ENABLED_STATE,
+            Disabled => IN_DISABLED_STATE,
+            Checked => IN_CHECKED_STATE,
+            Indeterminate => IN_INDETERMINATE_STATE,
+
+            AnyLink |
+            Link |
+            Visited |
+            ServoNonZeroBorder => ElementState::empty(),
+        }
+    }
+}
+
+#[derive(Clone, Debug, PartialEq, HeapSizeOf)]
+pub struct ServoSelectorImpl;
+
+impl SelectorImpl for ServoSelectorImpl {
+    type PseudoElement = PseudoElement;
+    type NonTSPseudoClass = NonTSPseudoClass;
+
+    fn parse_non_ts_pseudo_class(context: &ParserContext,
+                                 name: &str) -> Result<NonTSPseudoClass, ()> {
+        use self::NonTSPseudoClass::*;
+        let pseudo_class = match_ignore_ascii_case! { name,
+            "any-link" => AnyLink,
+            "link" => Link,
+            "visited" => Visited,
+            "active" => Active,
+            "focus" => Focus,
+            "hover" => Hover,
+            "enabled" => Enabled,
+            "disabled" => Disabled,
+            "checked" => Checked,
+            "indeterminate" => Indeterminate,
+            "-servo-nonzero-border" => {
+                if !context.in_user_agent_stylesheet {
+                    return Err(());
+                }
+                ServoNonZeroBorder
+            },
+            _ => return Err(())
+        };
+
+        Ok(pseudo_class)
+    }
+
+    fn parse_pseudo_element(_context: &ParserContext,
+                            name: &str) -> Result<PseudoElement, ()> {
+        use self::PseudoElement::*;
+        match_ignore_ascii_case! { name,
+            "before" => Ok(Before),
+            "after" => Ok(After),
+            _ => Err(())
+        }
+    }
+}