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-rw-r--r--servo/components/style/values/specified/page.rs99
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diff --git a/servo/components/style/values/specified/page.rs b/servo/components/style/values/specified/page.rs
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+/* 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 https://mozilla.org/MPL/2.0/. */
+
+//! Specified @page at-rule properties and named-page style properties
+
+use crate::parser::{Parse, ParserContext};
+use crate::values::generics::size::Size2D;
+use crate::values::specified::length::NonNegativeLength;
+use crate::values::{generics, CustomIdent};
+use cssparser::Parser;
+use style_traits::ParseError;
+
+pub use generics::page::PageOrientation;
+pub use generics::page::PageSizeOrientation;
+pub use generics::page::PaperSize;
+/// Specified value of the @page size descriptor
+pub type PageSize = generics::page::PageSize<Size2D<NonNegativeLength>>;
+
+impl Parse for PageSize {
+ fn parse<'i, 't>(
+ context: &ParserContext,
+ input: &mut Parser<'i, 't>,
+ ) -> Result<Self, ParseError<'i>> {
+ // Try to parse as <page-size> [ <orientation> ]
+ if let Ok(paper_size) = input.try_parse(PaperSize::parse) {
+ let orientation = input
+ .try_parse(PageSizeOrientation::parse)
+ .unwrap_or(PageSizeOrientation::Portrait);
+ return Ok(PageSize::PaperSize(paper_size, orientation));
+ }
+ // Try to parse as <orientation> [ <page-size> ]
+ if let Ok(orientation) = input.try_parse(PageSizeOrientation::parse) {
+ if let Ok(paper_size) = input.try_parse(PaperSize::parse) {
+ return Ok(PageSize::PaperSize(paper_size, orientation));
+ }
+ return Ok(PageSize::Orientation(orientation));
+ }
+ // Try to parse dimensions
+ if let Ok(size) =
+ input.try_parse(|i| Size2D::parse_with(context, i, NonNegativeLength::parse))
+ {
+ return Ok(PageSize::Size(size));
+ }
+ // auto value
+ input.expect_ident_matching("auto")?;
+ Ok(PageSize::Auto)
+ }
+}
+
+/// Page name value.
+///
+/// https://drafts.csswg.org/css-page-3/#using-named-pages
+#[derive(
+ Clone,
+ Debug,
+ MallocSizeOf,
+ PartialEq,
+ SpecifiedValueInfo,
+ ToCss,
+ ToComputedValue,
+ ToResolvedValue,
+ ToShmem,
+)]
+#[repr(C, u8)]
+pub enum PageName {
+ /// `auto` value.
+ Auto,
+ /// Page name value
+ PageName(CustomIdent),
+}
+
+impl Parse for PageName {
+ fn parse<'i, 't>(
+ _context: &ParserContext,
+ input: &mut Parser<'i, 't>,
+ ) -> Result<Self, ParseError<'i>> {
+ let location = input.current_source_location();
+ let ident = input.expect_ident()?;
+ Ok(match_ignore_ascii_case! { ident,
+ "auto" => PageName::auto(),
+ _ => PageName::PageName(CustomIdent::from_ident(location, ident, &[])?),
+ })
+ }
+}
+
+impl PageName {
+ /// `auto` value.
+ #[inline]
+ pub fn auto() -> Self {
+ PageName::Auto
+ }
+
+ /// Whether this is the `auto` value.
+ #[inline]
+ pub fn is_auto(&self) -> bool {
+ matches!(*self, PageName::Auto)
+ }
+}