1 files changed, 232 insertions, 0 deletions
diff --git a/servo/components/style/values/specified/ui.rs b/servo/components/style/values/specified/ui.rs
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+++ b/servo/components/style/values/specified/ui.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 types for UI properties.
+
+use crate::parser::{Parse, ParserContext};
+use crate::values::generics::ui as generics;
+use crate::values::specified::color::Color;
+use crate::values::specified::image::Image;
+use crate::values::specified::Number;
+use cssparser::Parser;
+use std::fmt::{self, Write};
+use style_traits::{
+    CssWriter, KeywordsCollectFn, ParseError, SpecifiedValueInfo, StyleParseErrorKind, ToCss,
+};
+
+/// A specified value for the `cursor` property.
+pub type Cursor = generics::GenericCursor<CursorImage>;
+
+/// A specified value for item of `image cursors`.
+pub type CursorImage = generics::GenericCursorImage<Image, Number>;
+
+impl Parse for Cursor {
+    /// cursor: [<url> [<number> <number>]?]# [auto | default | ...]
+    fn parse<'i, 't>(
+        context: &ParserContext,
+        input: &mut Parser<'i, 't>,
+    ) -> Result<Self, ParseError<'i>> {
+        let mut images = vec![];
+        loop {
+            match input.try_parse(|input| CursorImage::parse(context, input)) {
+                Ok(image) => images.push(image),
+                Err(_) => break,
+            }
+            input.expect_comma()?;
+        }
+        Ok(Self {
+            images: images.into(),
+            keyword: CursorKind::parse(input)?,
+        })
+    }
+}
+
+impl Parse for CursorImage {
+    fn parse<'i, 't>(
+        context: &ParserContext,
+        input: &mut Parser<'i, 't>,
+    ) -> Result<Self, ParseError<'i>> {
+        use crate::Zero;
+
+        let image = Image::parse_only_url(context, input)?;
+        let mut has_hotspot = false;
+        let mut hotspot_x = Number::zero();
+        let mut hotspot_y = Number::zero();
+
+        if let Ok(x) = input.try_parse(|input| Number::parse(context, input)) {
+            has_hotspot = true;
+            hotspot_x = x;
+            hotspot_y = Number::parse(context, input)?;
+        }
+
+        Ok(Self {
+            image,
+            has_hotspot,
+            hotspot_x,
+            hotspot_y,
+        })
+    }
+}
+
+// This trait is manually implemented because we don't support the whole <image>
+// syntax for cursors
+impl SpecifiedValueInfo for CursorImage {
+    fn collect_completion_keywords(f: KeywordsCollectFn) {
+        f(&["url", "image-set"]);
+    }
+}
+/// Specified value of `-moz-force-broken-image-icon`
+#[derive(
+    Clone,
+    Copy,
+    Debug,
+    MallocSizeOf,
+    PartialEq,
+    SpecifiedValueInfo,
+    ToComputedValue,
+    ToResolvedValue,
+    ToShmem,
+)]
+#[repr(transparent)]
+pub struct BoolInteger(pub bool);
+
+impl BoolInteger {
+    /// Returns 0
+    #[inline]
+    pub fn zero() -> Self {
+        Self(false)
+    }
+}
+
+impl Parse for BoolInteger {
+    fn parse<'i, 't>(
+        _context: &ParserContext,
+        input: &mut Parser<'i, 't>,
+    ) -> Result<Self, ParseError<'i>> {
+        // We intentionally don't support calc values here.
+        match input.expect_integer()? {
+            0 => Ok(Self(false)),
+            1 => Ok(Self(true)),
+            _ => Err(input.new_custom_error(StyleParseErrorKind::UnspecifiedError)),
+        }
+    }
+}
+
+impl ToCss for BoolInteger {
+    fn to_css<W>(&self, dest: &mut CssWriter<W>) -> fmt::Result
+    where
+        W: Write,
+    {
+        dest.write_str(if self.0 { "1" } else { "0" })
+    }
+}
+
+/// A specified value for `scrollbar-color` property
+pub type ScrollbarColor = generics::ScrollbarColor<Color>;
+
+impl Parse for ScrollbarColor {
+    fn parse<'i, 't>(
+        context: &ParserContext,
+        input: &mut Parser<'i, 't>,
+    ) -> Result<Self, ParseError<'i>> {
+        if input.try_parse(|i| i.expect_ident_matching("auto")).is_ok() {
+            return Ok(generics::ScrollbarColor::Auto);
+        }
+        Ok(generics::ScrollbarColor::Colors {
+            thumb: Color::parse(context, input)?,
+            track: Color::parse(context, input)?,
+        })
+    }
+}
+
+/// The specified value for the `user-select` property.
+///
+/// https://drafts.csswg.org/css-ui-4/#propdef-user-select
+#[allow(missing_docs)]
+#[derive(
+    Clone,
+    Copy,
+    Debug,
+    Eq,
+    MallocSizeOf,
+    Parse,
+    PartialEq,
+    SpecifiedValueInfo,
+    ToComputedValue,
+    ToCss,
+    ToResolvedValue,
+    ToShmem,
+)]
+#[repr(u8)]
+pub enum UserSelect {
+    Auto,
+    Text,
+    #[parse(aliases = "-moz-none")]
+    None,
+    /// Force selection of all children.
+    All,
+}
+
+/// The keywords allowed in the Cursor property.
+///
+/// https://drafts.csswg.org/css-ui-4/#propdef-cursor
+#[allow(missing_docs)]
+#[derive(
+    Clone,
+    Copy,
+    Debug,
+    Eq,
+    FromPrimitive,
+    MallocSizeOf,
+    Parse,
+    PartialEq,
+    SpecifiedValueInfo,
+    ToComputedValue,
+    ToCss,
+    ToResolvedValue,
+    ToShmem,
+)]
+#[repr(u8)]
+pub enum CursorKind {
+    None,
+    Default,
+    Pointer,
+    ContextMenu,
+    Help,
+    Progress,
+    Wait,
+    Cell,
+    Crosshair,
+    Text,
+    VerticalText,
+    Alias,
+    Copy,
+    Move,
+    NoDrop,
+    NotAllowed,
+    #[parse(aliases = "-moz-grab")]
+    Grab,
+    #[parse(aliases = "-moz-grabbing")]
+    Grabbing,
+    EResize,
+    NResize,
+    NeResize,
+    NwResize,
+    SResize,
+    SeResize,
+    SwResize,
+    WResize,
+    EwResize,
+    NsResize,
+    NeswResize,
+    NwseResize,
+    ColResize,
+    RowResize,
+    AllScroll,
+    #[parse(aliases = "-moz-zoom-in")]
+    ZoomIn,
+    #[parse(aliases = "-moz-zoom-out")]
+    ZoomOut,
+    Auto,
+}