Auto merge of #19957 - gootorov:move-counter-from-mako, r=emilio

style: Move content property out of mako.

<!-- Please describe your changes on the following line: -->
r? emilio

---
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- [x] `./mach build -d` does not report any errors
- [x] `./mach build-geckolib` does not report any errors
- [x] `./mach test-tidy` does not report any errors
- [x] These changes fix #19936 (github issue number if applicable).

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- [x] These changes do not require tests

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components/layout/construct.rs

@@ -37,14 +37,12 @@ use script_layout_interface::{LayoutElementType, LayoutNodeType, is_image_data};
 use script_layout_interface::wrapper_traits::{PseudoElementType, ThreadSafeLayoutElement, ThreadSafeLayoutNode};
 use servo_config::opts;
 use servo_url::ServoUrl;
-use std::borrow::ToOwned;
 use std::collections::LinkedList;
 use std::marker::PhantomData;
 use std::mem;
 use std::sync::Arc;
 use std::sync::atomic::Ordering;
 use style::computed_values::caption_side::T as CaptionSide;
-use style::computed_values::content::ContentItem;
 use style::computed_values::display::T as Display;
 use style::computed_values::empty_cells::T as EmptyCells;
 use style::computed_values::float::T as Float;
@@ -58,6 +56,7 @@ use style::properties::longhands::list_style_image;
 use style::selector_parser::{PseudoElement, RestyleDamage};
 use style::servo::restyle_damage::ServoRestyleDamage;
 use style::values::Either;
+use style::values::computed::counters::ContentItem;
 use table::TableFlow;
 use table_caption::TableCaptionFlow;
 use table_cell::TableCellFlow;
@@ -598,7 +597,7 @@ impl<'a, ConcreteThreadSafeLayoutNode: ThreadSafeLayoutNode>
                 // Add whitespace results. They will be stripped out later on when
                 // between block elements, and retained when between inline elements.
                 let fragment_info = SpecificFragmentInfo::UnscannedText(
-                    Box::new(UnscannedTextFragmentInfo::new(" ".to_owned(), None))
+                    Box::new(UnscannedTextFragmentInfo::new(Box::<str>::from(" "), None))
                 );
                 let fragment = Fragment::from_opaque_node_and_style(whitespace_node,
                                                                     whitespace_pseudo,
@@ -754,7 +753,7 @@ impl<'a, ConcreteThreadSafeLayoutNode: ThreadSafeLayoutNode>
                         ContentItem::String(string) => {
                             let info = Box::new(UnscannedTextFragmentInfo::new(string, None));
                             SpecificFragmentInfo::UnscannedText(info)
-                        }
+                        },
                         content_item => {
                             let content_item = Box::new(GeneratedContentInfo::ContentItem(content_item));
                             SpecificFragmentInfo::GeneratedContent(content_item)
@@ -873,7 +872,7 @@ impl<'a, ConcreteThreadSafeLayoutNode: ThreadSafeLayoutNode>
                         whitespace_damage)) => {
                     // Instantiate the whitespace fragment.
                     let fragment_info = SpecificFragmentInfo::UnscannedText(
-                        Box::new(UnscannedTextFragmentInfo::new(" ".to_owned(), None))
+                        Box::new(UnscannedTextFragmentInfo::new(Box::<str>::from(" "), None))
                     );
                     let fragment =
                         Fragment::from_opaque_node_and_style(whitespace_node,
@@ -895,7 +894,7 @@ impl<'a, ConcreteThreadSafeLayoutNode: ThreadSafeLayoutNode>
         if is_empty && node_style.has_padding_or_border() {
             // An empty inline box needs at least one fragment to draw its background and borders.
             let info = SpecificFragmentInfo::UnscannedText(
-                Box::new(UnscannedTextFragmentInfo::new(String::new(), None))
+                Box::new(UnscannedTextFragmentInfo::new(Box::<str>::from(""), None))
             );
             let fragment = Fragment::from_opaque_node_and_style(node.opaque(),
                                                                 node.get_pseudo_element_type(),
@@ -1296,7 +1295,7 @@ impl<'a, ConcreteThreadSafeLayoutNode: ThreadSafeLayoutNode>
                         unscanned_marker_fragments.push_back(Fragment::new(
                             node,
                             SpecificFragmentInfo::UnscannedText(
-                                Box::new(UnscannedTextFragmentInfo::new(text, None))
+                                Box::new(UnscannedTextFragmentInfo::new(Box::<str>::from(text), None))
                             ),
                             self.layout_context));
                         let marker_fragments =
@@ -1899,7 +1898,7 @@ where
     E: TElement,
 {
     let info = SpecificFragmentInfo::UnscannedText(
-        Box::new(UnscannedTextFragmentInfo::new(String::from(text), None))
+        Box::new(UnscannedTextFragmentInfo::new(Box::<str>::from(text), None))
     );
     let text_style = context.stylist.style_for_anonymous::<E>(
         &context.guards,

components/layout/fragment.rs

@@ -44,7 +44,6 @@ use style::computed_values::border_collapse::T as BorderCollapse;
 use style::computed_values::box_sizing::T as BoxSizing;
 use style::computed_values::clear::T as Clear;
 use style::computed_values::color::T as Color;
-use style::computed_values::content::ContentItem;
 use style::computed_values::display::T as Display;
 use style::computed_values::mix_blend_mode::T as MixBlendMode;
 use style::computed_values::overflow_wrap::T as OverflowWrap;
@@ -61,6 +60,7 @@ use style::servo::restyle_damage::ServoRestyleDamage;
 use style::str::char_is_whitespace;
 use style::values::{self, Either, Auto};
 use style::values::computed::{Length, LengthOrPercentage, LengthOrPercentageOrAuto};
+use style::values::computed::counters::ContentItem;
 use style::values::generics::box_::VerticalAlign;
 use style::values::generics::transform;
 use text;
@@ -570,9 +570,9 @@ pub struct UnscannedTextFragmentInfo {
 impl UnscannedTextFragmentInfo {
     /// Creates a new instance of `UnscannedTextFragmentInfo` from the given text.
     #[inline]
-    pub fn new(text: String, selection: Option<Range<ByteIndex>>) -> UnscannedTextFragmentInfo {
+    pub fn new(text: Box<str>, selection: Option<Range<ByteIndex>>) -> UnscannedTextFragmentInfo {
         UnscannedTextFragmentInfo {
-            text: text.into_boxed_str(),
+            text: text,
             selection: selection,
         }
     }
@@ -760,7 +760,7 @@ impl Fragment {
         let mut ellipsis_fragment = self.transform(
             self.border_box.size,
             SpecificFragmentInfo::UnscannedText(
-                Box::new(UnscannedTextFragmentInfo::new(text_overflow_string, None))
+                Box::new(UnscannedTextFragmentInfo::new(text_overflow_string.into_boxed_str(), None))
             )
         );
         unscanned_ellipsis_fragments.push_back(ellipsis_fragment);

components/layout/generated_content.rs

@@ -15,12 +15,12 @@ use gfx::display_list::OpaqueNode;
 use script_layout_interface::wrapper_traits::PseudoElementType;
 use smallvec::SmallVec;
 use std::collections::{HashMap, LinkedList};
-use style::computed_values::content::ContentItem;
 use style::computed_values::display::T as Display;
 use style::computed_values::list_style_type::T as ListStyleType;
 use style::properties::ComputedValues;
 use style::selector_parser::RestyleDamage;
 use style::servo::restyle_damage::ServoRestyleDamage;
+use style::values::computed::counters::ContentItem;
 use text::TextRunScanner;
 use traversal::InorderFlowTraversal;
 
@@ -189,7 +189,7 @@ impl<'a, 'b> ResolveGeneratedContentFragmentMutator<'a, 'b> {
                     let temporary_counter = Counter::new();
                     let counter = self.traversal
                                       .counters
-                                      .get(&*counter_name)
+                                      .get(&**counter_name)
                                       .unwrap_or(&temporary_counter);
                     new_info = counter.render(self.traversal.layout_context,
                                               fragment.node,
@@ -204,7 +204,7 @@ impl<'a, 'b> ResolveGeneratedContentFragmentMutator<'a, 'b> {
                     let temporary_counter = Counter::new();
                     let counter = self.traversal
                                       .counters
-                                      .get(&*counter_name)
+                                      .get(&**counter_name)
                                       .unwrap_or(&temporary_counter);
                     new_info = counter.render(self.traversal.layout_context,
                                               fragment.node,
@@ -437,7 +437,7 @@ fn render_text(layout_context: &LayoutContext,
                -> Option<SpecificFragmentInfo> {
     let mut fragments = LinkedList::new();
     let info = SpecificFragmentInfo::UnscannedText(
-        Box::new(UnscannedTextFragmentInfo::new(string, None))
+        Box::new(UnscannedTextFragmentInfo::new(string.into_boxed_str(), None))
     );
     fragments.push_back(Fragment::from_opaque_node_and_style(node,
                                                              pseudo,

components/layout/text.rs

@@ -532,7 +532,7 @@ fn split_first_fragment_at_newline_if_necessary(fragments: &mut LinkedList<Fragm
         first_fragment.transform(
             first_fragment.border_box.size,
             SpecificFragmentInfo::UnscannedText(Box::new(
-                UnscannedTextFragmentInfo::new(string_before, selection_before)
+                UnscannedTextFragmentInfo::new(string_before.into_boxed_str(), selection_before)
             ))
         )
     };

components/layout/wrapper.rs

@@ -34,9 +34,9 @@ use atomic_refcell::{AtomicRef, AtomicRefMut};
 use data::{LayoutData, LayoutDataFlags, StyleAndLayoutData};
 use script_layout_interface::wrapper_traits::{ThreadSafeLayoutElement, ThreadSafeLayoutNode};
 use script_layout_interface::wrapper_traits::GetLayoutData;
-use style::computed_values::content::{self, ContentItem};
 use style::dom::{NodeInfo, TNode};
 use style::selector_parser::RestyleDamage;
+use style::values::computed::counters::{Content, ContentItem};
 
 pub trait LayoutNodeLayoutData {
     /// Similar to borrow_data*, but returns the full PersistentLayoutData rather
@@ -114,14 +114,14 @@ impl<T: ThreadSafeLayoutNode> ThreadSafeLayoutNodeHelpers for T {
             let style = self.as_element().unwrap().resolved_style();
 
             return match style.as_ref().get_counters().content {
-                content::T::Items(ref value) if !value.is_empty() => {
-                    TextContent::GeneratedContent((*value).clone())
+                Content::Items(ref value) if !value.is_empty() => {
+                    TextContent::GeneratedContent((*value).to_vec())
                 }
                 _ => TextContent::GeneratedContent(vec![]),
             };
         }
 
-        return TextContent::Text(self.node_text_content());
+        TextContent::Text(self.node_text_content().into_boxed_str())
     }
 
     fn restyle_damage(self) -> RestyleDamage {
@@ -156,7 +156,7 @@ impl<T: ThreadSafeLayoutNode> ThreadSafeLayoutNodeHelpers for T {
 }
 
 pub enum TextContent {
-    Text(String),
+    Text(Box<str>),
     GeneratedContent(Vec<ContentItem>),
 }
 

components/style/properties/gecko.mako.rs

@@ -5459,8 +5459,7 @@ clip-path
     }
 
     pub fn set_content(&mut self, v: longhands::content::computed_value::T, device: &Device) {
-        use properties::longhands::content::computed_value::T;
-        use properties::longhands::content::computed_value::ContentItem;
+        use values::computed::counters::{Content, ContentItem};
         use values::generics::CounterStyleOrNone;
         use gecko_bindings::structs::nsStyleContentData;
         use gecko_bindings::structs::nsStyleContentType;
@@ -5494,8 +5493,8 @@ clip-path
         }
 
         match v {
-            T::None |
-            T::Normal => {
+            Content::None |
+            Content::Normal => {
                 // Ensure destructors run, otherwise we could leak.
                 if !self.gecko.mContents.is_empty() {
                     unsafe {
@@ -5503,14 +5502,14 @@ clip-path
                     }
                 }
             },
-            T::MozAltContent => {
+            Content::MozAltContent => {
                 unsafe {
                     Gecko_ClearAndResizeStyleContents(&mut self.gecko, 1);
                     *self.gecko.mContents[0].mContent.mString.as_mut() = ptr::null_mut();
                 }
                 self.gecko.mContents[0].mType = eStyleContentType_AltContent;
             },
-            T::Items(items) => {
+            Content::Items(items) => {
                 unsafe {
                     Gecko_ClearAndResizeStyleContents(&mut self.gecko,
                                                       items.len() as u32);
@@ -5522,8 +5521,8 @@ clip-path
                     unsafe {
                         *self.gecko.mContents[i].mContent.mString.as_mut() = ptr::null_mut();
                     }
-                    match item {
-                        ContentItem::String(value) => {
+                    match *item {
+                        ContentItem::String(ref value) => {
                             self.gecko.mContents[i].mType = eStyleContentType_String;
                             unsafe {
                                 // NB: we share allocators, so doing this is fine.
@@ -5531,17 +5530,18 @@ clip-path
                                     as_utf16_and_forget(&value);
                             }
                         }
-                        ContentItem::Attr(attr) => {
+                        ContentItem::Attr(ref attr) => {
                             self.gecko.mContents[i].mType = eStyleContentType_Attr;
-                            let s = if let Some((_, ns)) = attr.namespace {
-                                format!("{}|{}", ns, attr.attribute)
-                            } else {
-                                attr.attribute.into()
-                            };
                             unsafe {
                                 // NB: we share allocators, so doing this is fine.
-                                *self.gecko.mContents[i].mContent.mString.as_mut() =
-                                    as_utf16_and_forget(&s);
+                                *self.gecko.mContents[i].mContent.mString.as_mut() = match attr.namespace {
+                                    Some((_, ns)) => {
+                                        as_utf16_and_forget(&format!("{}|{}", ns, attr.attribute))
+                                    },
+                                    None => {
+                                        as_utf16_and_forget(&attr.attribute)
+                                    }
+                                };
                             }
                         }
                         ContentItem::OpenQuote
@@ -5552,13 +5552,13 @@ clip-path
                             => self.gecko.mContents[i].mType = eStyleContentType_NoOpenQuote,
                         ContentItem::NoCloseQuote
                             => self.gecko.mContents[i].mType = eStyleContentType_NoCloseQuote,
-                        ContentItem::Counter(name, style) => {
+                        ContentItem::Counter(ref name, ref style) => {
                             set_counter_function(&mut self.gecko.mContents[i],
-                                                 eStyleContentType_Counter, &name, "", style, device);
+                                                 eStyleContentType_Counter, &name, "", style.clone(), device);
                         }
-                        ContentItem::Counters(name, sep, style) => {
+                        ContentItem::Counters(ref name, ref sep, ref style) => {
                             set_counter_function(&mut self.gecko.mContents[i],
-                                                 eStyleContentType_Counters, &name, &sep, style, device);
+                                                 eStyleContentType_Counters, &name, &sep, style.clone(), device);
                         }
                         ContentItem::Url(ref url) => {
                             unsafe {
@@ -5586,22 +5586,22 @@ clip-path
     pub fn clone_content(&self) -> longhands::content::computed_value::T {
         use gecko::conversions::string_from_chars_pointer;
         use gecko_bindings::structs::nsStyleContentType::*;
-        use properties::longhands::content::computed_value::{T, ContentItem};
+        use values::computed::counters::{Content, ContentItem};
         use values::Either;
         use values::generics::CounterStyleOrNone;
         use values::specified::url::SpecifiedUrl;
         use values::specified::Attr;
 
         if self.gecko.mContents.is_empty() {
-            return T::Normal;
+            return Content::Normal;
         }
 
         if self.gecko.mContents.len() == 1 &&
            self.gecko.mContents[0].mType == eStyleContentType_AltContent {
-            return T::MozAltContent;
+            return Content::MozAltContent;
         }
 
-        T::Items(
+        Content::Items(
             self.gecko.mContents.iter().map(|gecko_content| {
                 match gecko_content.mType {
                     eStyleContentType_OpenQuote => ContentItem::OpenQuote,
@@ -5611,7 +5611,7 @@ clip-path
                     eStyleContentType_String => {
                         let gecko_chars = unsafe { gecko_content.mContent.mString.as_ref() };
                         let string = unsafe { string_from_chars_pointer(*gecko_chars) };
-                        ContentItem::String(string)
+                        ContentItem::String(string.into_boxed_str())
                     },
                     eStyleContentType_Attr => {
                         let gecko_chars = unsafe { gecko_content.mContent.mString.as_ref() };
@@ -5641,10 +5641,10 @@ clip-path
                                 unreachable!("counter function shouldn't have single string type"),
                         };
                         if gecko_content.mType == eStyleContentType_Counter {
-                            ContentItem::Counter(ident, style)
+                            ContentItem::Counter(ident.into_boxed_str(), style)
                         } else {
                             let separator = gecko_function.mSeparator.to_string();
-                            ContentItem::Counters(ident, separator, style)
+                            ContentItem::Counters(ident.into_boxed_str(), separator.into_boxed_str(), style)
                         }
                     },
                     eStyleContentType_Image => {
@@ -5659,7 +5659,7 @@ clip-path
                     },
                     _ => panic!("Found unexpected value in style struct for content property"),
                 }
-            }).collect()
+            }).collect::<Vec<_>>().into_boxed_slice()
         )
     }
 

components/style/properties/longhand/counters.mako.rs

@@ -6,235 +6,12 @@
 
 <% data.new_style_struct("Counters", inherited=False, gecko_name="Content") %>
 
-<%helpers:longhand name="content" boxed="True" animation_value_type="discrete"
-                   spec="https://drafts.csswg.org/css-content/#propdef-content">
-    #[cfg(feature = "gecko")]
-    use values::generics::CounterStyleOrNone;
-    #[cfg(feature = "gecko")]
-    use values::specified::url::SpecifiedUrl;
-    #[cfg(feature = "gecko")]
-    use values::specified::Attr;
-
-    #[cfg(feature = "servo")]
-    use super::list_style_type;
-
-    pub use self::computed_value::T as SpecifiedValue;
-    pub use self::computed_value::ContentItem;
-
-    pub mod computed_value {
-        use cssparser;
-        use std::fmt::{self, Write};
-        use style_traits::{CssWriter, ToCss};
-        #[cfg(feature = "gecko")]
-        use values::specified::url::SpecifiedUrl;
-
-        #[cfg(feature = "servo")]
-        type CounterStyleType = super::super::list_style_type::computed_value::T;
-        #[cfg(feature = "gecko")]
-        type CounterStyleType = ::values::generics::CounterStyleOrNone;
-
-        #[cfg(feature = "gecko")]
-        use values::specified::Attr;
-
-        #[derive(Clone, Debug, Eq, MallocSizeOf, PartialEq, ToComputedValue)]
-        pub enum ContentItem {
-            /// Literal string content.
-            String(String),
-            /// `counter(name, style)`.
-            Counter(String, CounterStyleType),
-            /// `counters(name, separator, style)`.
-            Counters(String, String, CounterStyleType),
-            /// `open-quote`.
-            OpenQuote,
-            /// `close-quote`.
-            CloseQuote,
-            /// `no-open-quote`.
-            NoOpenQuote,
-            /// `no-close-quote`.
-            NoCloseQuote,
-
-            % if product == "gecko":
-                /// `attr([namespace? `|`]? ident)`
-                Attr(Attr),
-                /// `url(url)`
-                Url(SpecifiedUrl),
-            % endif
-        }
-
-        impl ToCss for ContentItem {
-            fn to_css<W>(&self, dest: &mut CssWriter<W>) -> fmt::Result
-            where
-                W: Write,
-            {
-                match *self {
-                    ContentItem::String(ref s) => s.to_css(dest),
-                    ContentItem::Counter(ref s, ref counter_style) => {
-                        dest.write_str("counter(")?;
-                        cssparser::serialize_identifier(&**s, dest)?;
-                        dest.write_str(", ")?;
-                        counter_style.to_css(dest)?;
-                        dest.write_str(")")
-                    }
-                    ContentItem::Counters(ref s, ref separator, ref counter_style) => {
-                        dest.write_str("counters(")?;
-                        cssparser::serialize_identifier(&**s, dest)?;
-                        dest.write_str(", ")?;
-                        separator.to_css(dest)?;
-                        dest.write_str(", ")?;
-                        counter_style.to_css(dest)?;
-                        dest.write_str(")")
-                    }
-                    ContentItem::OpenQuote => dest.write_str("open-quote"),
-                    ContentItem::CloseQuote => dest.write_str("close-quote"),
-                    ContentItem::NoOpenQuote => dest.write_str("no-open-quote"),
-                    ContentItem::NoCloseQuote => dest.write_str("no-close-quote"),
-
-                    % if product == "gecko":
-                        ContentItem::Attr(ref attr) => {
-                            attr.to_css(dest)
-                        }
-                        ContentItem::Url(ref url) => url.to_css(dest),
-                    % endif
-                }
-            }
-        }
-
-        #[derive(Clone, Debug, Eq, MallocSizeOf, PartialEq, ToComputedValue)]
-        pub enum T {
-            Normal,
-            None,
-            #[cfg(feature = "gecko")]
-            MozAltContent,
-            Items(Vec<ContentItem>),
-        }
-
-        impl ToCss for T {
-            fn to_css<W>(&self, dest: &mut CssWriter<W>) -> fmt::Result
-            where
-                W: Write,
-            {
-                match *self {
-                    T::Normal => dest.write_str("normal"),
-                    T::None => dest.write_str("none"),
-                    % if product == "gecko":
-                        T::MozAltContent => dest.write_str("-moz-alt-content"),
-                    % endif
-                    T::Items(ref content) => {
-                        let mut iter = content.iter();
-                        iter.next().unwrap().to_css(dest)?;
-                        for c in iter {
-                            dest.write_str(" ")?;
-                            c.to_css(dest)?;
-                        }
-                        Ok(())
-                    }
-                }
-            }
-        }
-    }
-    #[inline]
-    pub fn get_initial_value() -> computed_value::T {
-        computed_value::T::Normal
-    }
-
-    #[cfg(feature = "servo")]
-    fn parse_counter_style(context: &ParserContext, input: &mut Parser) -> list_style_type::computed_value::T {
-        input.try(|input| {
-            input.expect_comma()?;
-            list_style_type::parse(context, input)
-        }).unwrap_or(list_style_type::computed_value::T::Decimal)
-    }
-
-    #[cfg(feature = "gecko")]
-    fn parse_counter_style(context: &ParserContext, input: &mut Parser) -> CounterStyleOrNone {
-        input.try(|input| {
-            input.expect_comma()?;
-            CounterStyleOrNone::parse(context, input)
-        }).unwrap_or(CounterStyleOrNone::decimal())
-    }
-
-    // normal | none | [ <string> | <counter> | open-quote | close-quote | no-open-quote |
-    // no-close-quote ]+
-    // TODO: <uri>, attr(<identifier>)
-    pub fn parse<'i, 't>(context: &ParserContext, input: &mut Parser<'i, 't>)
-                         -> Result<SpecifiedValue, ParseError<'i>> {
-        if input.try(|input| input.expect_ident_matching("normal")).is_ok() {
-            return Ok(SpecifiedValue::Normal)
-        }
-        if input.try(|input| input.expect_ident_matching("none")).is_ok() {
-            return Ok(SpecifiedValue::None)
-        }
-        % if product == "gecko":
-            if input.try(|input| input.expect_ident_matching("-moz-alt-content")).is_ok() {
-                return Ok(SpecifiedValue::MozAltContent)
-            }
-        % endif
-
-        let mut content = vec![];
-        loop {
-            % if product == "gecko":
-                if let Ok(mut url) = input.try(|i| SpecifiedUrl::parse(context, i)) {
-                    url.build_image_value();
-                    content.push(ContentItem::Url(url));
-                    continue;
-                }
-            % endif
-            // FIXME: remove clone() when lifetimes are non-lexical
-            match input.next().map(|t| t.clone()) {
-                Ok(Token::QuotedString(ref value)) => {
-                    content.push(ContentItem::String(value.as_ref().to_owned()))
-                }
-                Ok(Token::Function(ref name)) => {
-                    let result = match_ignore_ascii_case! { &name,
-                        "counter" => Some(input.parse_nested_block(|input| {
-                            let name = input.expect_ident()?.as_ref().to_owned();
-                            let style = parse_counter_style(context, input);
-                            Ok(ContentItem::Counter(name, style))
-                        })),
-                        "counters" => Some(input.parse_nested_block(|input| {
-                            let name = input.expect_ident()?.as_ref().to_owned();
-                            input.expect_comma()?;
-                            let separator = input.expect_string()?.as_ref().to_owned();
-                            let style = parse_counter_style(context, input);
-                            Ok(ContentItem::Counters(name, separator, style))
-                        })),
-                        % if product == "gecko":
-                            "attr" => Some(input.parse_nested_block(|input| {
-                                Ok(ContentItem::Attr(Attr::parse_function(context, input)?))
-                            })),
-                        % endif
-                        _ => None
-                    };
-                    match result {
-                        Some(result) => content.push(result?),
-                        None => return Err(input.new_custom_error(
-                            StyleParseErrorKind::UnexpectedFunction(name.clone())
-                        ))
-                    }
-                }
-                Ok(Token::Ident(ref ident)) => {
-                    let valid = match_ignore_ascii_case! { &ident,
-                        "open-quote" => { content.push(ContentItem::OpenQuote); true },
-                        "close-quote" => { content.push(ContentItem::CloseQuote); true },
-                        "no-open-quote" => { content.push(ContentItem::NoOpenQuote); true },
-                        "no-close-quote" => { content.push(ContentItem::NoCloseQuote); true },
-
-                        _ => false,
-                    };
-                    if !valid {
-                        return Err(input.new_custom_error(SelectorParseErrorKind::UnexpectedIdent(ident.clone())))
-                    }
-                }
-                Err(_) => break,
-                Ok(t) => return Err(input.new_unexpected_token_error(t))
-            }
-        }
-        if content.is_empty() {
-            return Err(input.new_custom_error(StyleParseErrorKind::UnspecifiedError));
-        }
-        Ok(SpecifiedValue::Items(content))
-    }
-</%helpers:longhand>
+${helpers.predefined_type("content",
+                          "Content",
+                          "computed::Content::normal()",
+                          initial_specified_value="specified::Content::normal()",
+                          animation_value_type="discrete",
+                          spec="https://drafts.csswg.org/css-content/#propdef-content")}
 
 ${helpers.predefined_type(
     "counter-increment",

components/style/values/computed/counters.rs

@@ -4,11 +4,202 @@
 
 //! Computed values for counter properties
 
+#[cfg(feature = "servo")]
+use computed_values::list_style_type::T as ListStyleType;
+use cssparser::{self, Parser, Token};
+use parser::{Parse, ParserContext};
+use selectors::parser::SelectorParseErrorKind;
+use std::fmt::{self, Write};
+use style_traits::{CssWriter, ParseError, StyleParseErrorKind, ToCss};
+#[cfg(feature = "gecko")]
+use values::generics::CounterStyleOrNone;
 use values::generics::counters::CounterIncrement as GenericCounterIncrement;
 use values::generics::counters::CounterReset as GenericCounterReset;
+#[cfg(feature = "gecko")]
+use values::specified::Attr;
+#[cfg(feature = "gecko")]
+use values::specified::url::SpecifiedUrl;
+pub use values::specified::{Content, ContentItem};
 
 /// A computed value for the `counter-increment` property.
 pub type CounterIncrement = GenericCounterIncrement<i32>;
 
 /// A computed value for the `counter-increment` property.
 pub type CounterReset = GenericCounterReset<i32>;
+
+impl Content {
+    /// Set `content` property to `normal`.
+    #[inline]
+    pub fn normal() -> Self {
+        Content::Normal
+    }
+
+    #[cfg(feature = "servo")]
+    fn parse_counter_style(
+        input: &mut Parser
+    ) -> ListStyleType {
+        input.try(|input| {
+            input.expect_comma()?;
+            ListStyleType::parse(input)
+        }).unwrap_or(ListStyleType::Decimal)
+    }
+
+    #[cfg(feature = "gecko")]
+    fn parse_counter_style(
+        context: &ParserContext,
+        input: &mut Parser
+    ) -> CounterStyleOrNone {
+        input.try(|input| {
+            input.expect_comma()?;
+            CounterStyleOrNone::parse(context, input)
+        }).unwrap_or(CounterStyleOrNone::decimal())
+    }
+}
+
+impl Parse for Content {
+    // normal | none | [ <string> | <counter> | open-quote | close-quote | no-open-quote |
+    // no-close-quote ]+
+    // TODO: <uri>, attr(<identifier>)
+    fn parse<'i, 't>(
+        _context: &ParserContext,
+        input: &mut Parser<'i, 't>
+    ) -> Result<Self, ParseError<'i>> {
+        if input.try(|input| input.expect_ident_matching("normal")).is_ok() {
+            return Ok(Content::Normal);
+        }
+        if input.try(|input| input.expect_ident_matching("none")).is_ok() {
+            return Ok(Content::None);
+        }
+        #[cfg(feature = "gecko")] {
+            if input.try(|input| input.expect_ident_matching("-moz-alt-content")).is_ok() {
+                return Ok(Content::MozAltContent);
+            }
+        }
+
+        let mut content = vec![];
+        loop {
+            #[cfg(feature = "gecko")] {
+                if let Ok(mut url) = input.try(|i| SpecifiedUrl::parse(_context, i)) {
+                    url.build_image_value();
+                    content.push(ContentItem::Url(url));
+                    continue;
+                }
+            }
+            // FIXME: remove clone() when lifetimes are non-lexical
+            match input.next().map(|t| t.clone()) {
+                Ok(Token::QuotedString(ref value)) => {
+                    content.push(ContentItem::String(value.as_ref().to_owned().into_boxed_str()));
+                }
+                Ok(Token::Function(ref name)) => {
+                    let result = match_ignore_ascii_case! { &name,
+                        "counter" => Some(input.parse_nested_block(|input| {
+                            let name = input.expect_ident()?.as_ref().to_owned().into_boxed_str();
+                            #[cfg(feature = "servo")]
+                            let style = Content::parse_counter_style(input);
+                            #[cfg(feature = "gecko")]
+                            let style = Content::parse_counter_style(_context, input);
+                            Ok(ContentItem::Counter(name, style))
+                        })),
+                        "counters" => Some(input.parse_nested_block(|input| {
+                            let name = input.expect_ident()?.as_ref().to_owned().into_boxed_str();
+                            input.expect_comma()?;
+                            let separator = input.expect_string()?.as_ref().to_owned().into_boxed_str();
+                            #[cfg(feature = "servo")]
+                            let style = Content::parse_counter_style(input);
+                            #[cfg(feature = "gecko")]
+                            let style = Content::parse_counter_style(_context, input);
+                            Ok(ContentItem::Counters(name, separator, style))
+                        })),
+                        #[cfg(feature = "gecko")]
+                        "attr" => Some(input.parse_nested_block(|input| {
+                            Ok(ContentItem::Attr(Attr::parse_function(_context, input)?))
+                        })),
+                        _ => None
+                    };
+                    match result {
+                        Some(result) => content.push(result?),
+                        None => return Err(input.new_custom_error(
+                            StyleParseErrorKind::UnexpectedFunction(name.clone())
+                        ))
+                    }
+                }
+                Ok(Token::Ident(ref ident)) => {
+                    content.push(
+                        match_ignore_ascii_case! { &ident,
+                            "open-quote" => ContentItem::OpenQuote,
+                            "close-quote" => ContentItem::CloseQuote,
+                            "no-open-quote" => ContentItem::NoOpenQuote,
+                            "no-close-quote" => ContentItem::NoCloseQuote,
+                            _ => return Err(input.new_custom_error(
+                                    SelectorParseErrorKind::UnexpectedIdent(ident.clone())))
+                        }
+                    );
+                }
+                Err(_) => break,
+                Ok(t) => return Err(input.new_unexpected_token_error(t))
+            }
+        }
+        if content.is_empty() {
+            return Err(input.new_custom_error(StyleParseErrorKind::UnspecifiedError));
+        }
+        Ok(Content::Items(content.into_boxed_slice()))
+    }
+}
+
+impl ToCss for Content {
+    fn to_css<W>(&self, dest: &mut CssWriter<W>) -> fmt::Result
+        where W: Write,
+    {
+        match *self {
+            Content::Normal => dest.write_str("normal"),
+            Content::None => dest.write_str("none"),
+            #[cfg(feature = "gecko")]
+            Content::MozAltContent => dest.write_str("-moz-alt-content"),
+            Content::Items(ref content) => {
+                let mut iter = content.iter();
+                iter.next().unwrap().to_css(dest)?;
+                for c in iter {
+                    dest.write_str(" ")?;
+                    c.to_css(dest)?;
+                }
+                Ok(())
+            }
+        }
+    }
+}
+
+impl ToCss for ContentItem {
+    fn to_css<W>(&self, dest: &mut CssWriter<W>) -> fmt::Result
+        where W: Write,
+    {
+        match *self {
+            ContentItem::String(ref s) => s.to_css(dest),
+            ContentItem::Counter(ref s, ref counter_style) => {
+                dest.write_str("counter(")?;
+                cssparser::serialize_identifier(&**s, dest)?;
+                dest.write_str(", ")?;
+                counter_style.to_css(dest)?;
+                dest.write_str(")")
+            }
+            ContentItem::Counters(ref s, ref separator, ref counter_style) => {
+                dest.write_str("counters(")?;
+                cssparser::serialize_identifier(&**s, dest)?;
+                dest.write_str(", ")?;
+                separator.to_css(dest)?;
+                dest.write_str(", ")?;
+                counter_style.to_css(dest)?;
+                dest.write_str(")")
+            }
+            ContentItem::OpenQuote => dest.write_str("open-quote"),
+            ContentItem::CloseQuote => dest.write_str("close-quote"),
+            ContentItem::NoOpenQuote => dest.write_str("no-open-quote"),
+            ContentItem::NoCloseQuote => dest.write_str("no-close-quote"),
+            #[cfg(feature = "gecko")]
+            ContentItem::Attr(ref attr) => {
+                attr.to_css(dest)
+            }
+            #[cfg(feature = "gecko")]
+            ContentItem::Url(ref url) => url.to_css(dest),
+        }
+    }
+}

components/style/values/computed/mod.rs

@@ -46,7 +46,7 @@ pub use self::font::{MozScriptLevel, MozScriptMinSize, MozScriptSizeMultiplier,
 pub use self::box_::{AnimationIterationCount, AnimationName, Display, OverscrollBehavior, Contain};
 pub use self::box_::{OverflowClipBox, ScrollSnapType, TouchAction, VerticalAlign, WillChange};
 pub use self::color::{Color, ColorPropertyValue, RGBAColor};
-pub use self::counters::{CounterIncrement, CounterReset};
+pub use self::counters::{Content, ContentItem, CounterIncrement, CounterReset};
 pub use self::effects::{BoxShadow, Filter, SimpleShadow};
 pub use self::flex::FlexBasis;
 pub use self::image::{Gradient, GradientItem, Image, ImageLayer, LineDirection, MozImageRect};

components/style/values/specified/counters.rs

@@ -4,13 +4,21 @@
 
 //! Specified types for counter properties.
 
+#[cfg(feature = "servo")]
+use computed_values::list_style_type::T as ListStyleType;
 use cssparser::{Token, Parser};
 use parser::{Parse, ParserContext};
 use style_traits::{ParseError, StyleParseErrorKind};
 use values::CustomIdent;
+#[cfg(feature = "gecko")]
+use values::generics::CounterStyleOrNone;
 use values::generics::counters::CounterIncrement as GenericCounterIncrement;
 use values::generics::counters::CounterReset as GenericCounterReset;
+#[cfg(feature = "gecko")]
+use values::specified::Attr;
 use values::specified::Integer;
+#[cfg(feature = "gecko")]
+use values::specified::url::SpecifiedUrl;
 
 /// A specified value for the `counter-increment` property.
 pub type CounterIncrement = GenericCounterIncrement<Integer>;
@@ -65,3 +73,49 @@ fn parse_counters<'i, 't>(
         Err(input.new_custom_error(StyleParseErrorKind::UnspecifiedError))
     }
 }
+
+#[cfg(feature = "servo")]
+type CounterStyleType = ListStyleType;
+#[cfg(feature = "gecko")]
+type CounterStyleType = CounterStyleOrNone;
+
+/// The specified value for the `content` property.
+///
+/// https://drafts.csswg.org/css-content/#propdef-content
+#[derive(Clone, Debug, Eq, MallocSizeOf, PartialEq, ToComputedValue)]
+pub enum Content {
+    /// `normal` reserved keyword.
+    Normal,
+    /// `none` reserved keyword.
+    None,
+    /// `-moz-alt-content`.
+    #[cfg(feature = "gecko")]
+    MozAltContent,
+    /// Content items.
+    Items(Box<[ContentItem]>),
+}
+
+/// Items for the `content` property.
+#[derive(Clone, Debug, Eq, MallocSizeOf, PartialEq, ToComputedValue)]
+pub enum ContentItem {
+    /// Literal string content.
+    String(Box<str>),
+    /// `counter(name, style)`.
+    Counter(Box<str>, CounterStyleType),
+    /// `counters(name, separator, style)`.
+    Counters(Box<str>, Box<str>, CounterStyleType),
+    /// `open-quote`.
+    OpenQuote,
+    /// `close-quote`.
+    CloseQuote,
+    /// `no-open-quote`.
+    NoOpenQuote,
+    /// `no-close-quote`.
+    NoCloseQuote,
+    /// `attr([namespace? `|`]? ident)`
+    #[cfg(feature = "gecko")]
+    Attr(Attr),
+    /// `url(url)`
+    #[cfg(feature = "gecko")]
+    Url(SpecifiedUrl),
+}

components/style/values/specified/mod.rs

@@ -40,7 +40,7 @@ pub use self::font::{MozScriptLevel, MozScriptMinSize, MozScriptSizeMultiplier,
 pub use self::box_::{AnimationIterationCount, AnimationName, Display, OverscrollBehavior, Contain};
 pub use self::box_::{OverflowClipBox, ScrollSnapType, TouchAction, VerticalAlign, WillChange};
 pub use self::color::{Color, ColorPropertyValue, RGBAColor};
-pub use self::counters::{CounterIncrement, CounterReset};
+pub use self::counters::{Content, ContentItem, CounterIncrement, CounterReset};
 pub use self::effects::{BoxShadow, Filter, SimpleShadow};
 pub use self::flex::FlexBasis;
 #[cfg(feature = "gecko")]