Adding upstream version 1:115.7.0.upstream/1%115.7.0upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 286 insertions, 0 deletions

diff --git a/servo/components/style_traits/lib.rs b/servo/components/style_traits/lib.rs
new file mode 100644
index 0000000000..054b74b6b8
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+++ b/servo/components/style_traits/lib.rs
@@ -0,0 +1,286 @@
+/* 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/. */
+
+//! This module contains shared types and messages for use by devtools/script.
+//! The traits are here instead of in script so that the devtools crate can be
+//! modified independently of the rest of Servo.
+
+#![crate_name = "style_traits"]
+#![crate_type = "rlib"]
+#![deny(unsafe_code, missing_docs)]
+
+extern crate app_units;
+#[macro_use]
+extern crate bitflags;
+#[macro_use]
+extern crate cssparser;
+extern crate euclid;
+#[macro_use]
+extern crate lazy_static;
+extern crate malloc_size_of;
+#[macro_use]
+extern crate malloc_size_of_derive;
+extern crate selectors;
+#[macro_use]
+extern crate serde;
+extern crate servo_arc;
+#[cfg(feature = "servo")]
+extern crate servo_atoms;
+#[cfg(feature = "servo")]
+extern crate servo_url;
+extern crate to_shmem;
+#[macro_use]
+extern crate to_shmem_derive;
+#[cfg(feature = "servo")]
+extern crate webrender_api;
+#[cfg(feature = "servo")]
+pub use webrender_api::units::DevicePixel;
+
+use cssparser::{CowRcStr, Token};
+use selectors::parser::SelectorParseErrorKind;
+#[cfg(feature = "servo")]
+use servo_atoms::Atom;
+
+/// One hardware pixel.
+///
+/// This unit corresponds to the smallest addressable element of the display hardware.
+#[cfg(not(feature = "servo"))]
+#[derive(Clone, Copy, Debug)]
+pub enum DevicePixel {}
+
+/// Represents a mobile style pinch zoom factor.
+/// TODO(gw): Once WR supports pinch zoom, use a type directly from webrender_api.
+#[derive(Clone, Copy, Debug, PartialEq)]
+#[cfg_attr(feature = "servo", derive(Deserialize, Serialize, MallocSizeOf))]
+pub struct PinchZoomFactor(f32);
+
+impl PinchZoomFactor {
+    /// Construct a new pinch zoom factor.
+    pub fn new(scale: f32) -> PinchZoomFactor {
+        PinchZoomFactor(scale)
+    }
+
+    /// Get the pinch zoom factor as an untyped float.
+    pub fn get(&self) -> f32 {
+        self.0
+    }
+}
+
+/// One CSS "px" in the coordinate system of the "initial viewport":
+/// <http://www.w3.org/TR/css-device-adapt/#initial-viewport>
+///
+/// `CSSPixel` is equal to `DeviceIndependentPixel` times a "page zoom" factor controlled by the user.  This is
+/// the desktop-style "full page" zoom that enlarges content but then reflows the layout viewport
+/// so it still exactly fits the visible area.
+///
+/// At the default zoom level of 100%, one `CSSPixel` is equal to one `DeviceIndependentPixel`.  However, if the
+/// document is zoomed in or out then this scale may be larger or smaller.
+#[derive(Clone, Copy, Debug)]
+pub enum CSSPixel {}
+
+// In summary, the hierarchy of pixel units and the factors to convert from one to the next:
+//
+// DevicePixel
+//   / hidpi_ratio => DeviceIndependentPixel
+//     / desktop_zoom => CSSPixel
+
+pub mod arc_slice;
+pub mod dom;
+pub mod specified_value_info;
+#[macro_use]
+pub mod values;
+#[macro_use]
+pub mod viewport;
+pub mod owned_slice;
+pub mod owned_str;
+
+pub use crate::specified_value_info::{CssType, KeywordsCollectFn, SpecifiedValueInfo};
+pub use crate::values::{
+    Comma, CommaWithSpace, CssWriter, OneOrMoreSeparated, Separator, Space, ToCss,
+};
+
+/// The error type for all CSS parsing routines.
+pub type ParseError<'i> = cssparser::ParseError<'i, StyleParseErrorKind<'i>>;
+
+/// Error in property value parsing
+pub type ValueParseError<'i> = cssparser::ParseError<'i, ValueParseErrorKind<'i>>;
+
+#[derive(Clone, Debug, PartialEq)]
+/// Errors that can be encountered while parsing CSS values.
+pub enum StyleParseErrorKind<'i> {
+    /// A bad URL token in a DVB.
+    BadUrlInDeclarationValueBlock(CowRcStr<'i>),
+    /// A bad string token in a DVB.
+    BadStringInDeclarationValueBlock(CowRcStr<'i>),
+    /// Unexpected closing parenthesis in a DVB.
+    UnbalancedCloseParenthesisInDeclarationValueBlock,
+    /// Unexpected closing bracket in a DVB.
+    UnbalancedCloseSquareBracketInDeclarationValueBlock,
+    /// Unexpected closing curly bracket in a DVB.
+    UnbalancedCloseCurlyBracketInDeclarationValueBlock,
+    /// A property declaration value had input remaining after successfully parsing.
+    PropertyDeclarationValueNotExhausted,
+    /// An unexpected dimension token was encountered.
+    UnexpectedDimension(CowRcStr<'i>),
+    /// Missing or invalid media feature name.
+    MediaQueryExpectedFeatureName(CowRcStr<'i>),
+    /// Missing or invalid media feature value.
+    MediaQueryExpectedFeatureValue,
+    /// A media feature range operator was not expected.
+    MediaQueryUnexpectedOperator,
+    /// min- or max- properties must have a value.
+    RangedExpressionWithNoValue,
+    /// A function was encountered that was not expected.
+    UnexpectedFunction(CowRcStr<'i>),
+    /// Error encountered parsing a @property's `syntax` descriptor
+    PropertySyntaxField(PropertySyntaxParseError),
+    /// @namespace must be before any rule but @charset and @import
+    UnexpectedNamespaceRule,
+    /// @import must be before any rule but @charset
+    UnexpectedImportRule,
+    /// @import rules are disallowed in the parser.
+    DisallowedImportRule,
+    /// Unexpected @charset rule encountered.
+    UnexpectedCharsetRule,
+    /// The @property `<custom-property-name>` must start with `--`
+    UnexpectedIdent(CowRcStr<'i>),
+    /// A placeholder for many sources of errors that require more specific variants.
+    UnspecifiedError,
+    /// An unexpected token was found within a namespace rule.
+    UnexpectedTokenWithinNamespace(Token<'i>),
+    /// An error was encountered while parsing a property value.
+    ValueError(ValueParseErrorKind<'i>),
+    /// An error was encountered while parsing a selector
+    SelectorError(SelectorParseErrorKind<'i>),
+    /// The property declaration was for an unknown property.
+    UnknownProperty(CowRcStr<'i>),
+    /// The property declaration was for a disabled experimental property.
+    ExperimentalProperty,
+    /// The property declaration contained an invalid color value.
+    InvalidColor(CowRcStr<'i>, Token<'i>),
+    /// The property declaration contained an invalid filter value.
+    InvalidFilter(CowRcStr<'i>, Token<'i>),
+    /// The property declaration contained an invalid value.
+    OtherInvalidValue(CowRcStr<'i>),
+    /// The declaration contained an animation property, and we were parsing
+    /// this as a keyframe block (so that property should be ignored).
+    ///
+    /// See: https://drafts.csswg.org/css-animations/#keyframes
+    AnimationPropertyInKeyframeBlock,
+    /// The property is not allowed within a page rule.
+    NotAllowedInPageRule,
+}
+
+impl<'i> From<ValueParseErrorKind<'i>> for StyleParseErrorKind<'i> {
+    fn from(this: ValueParseErrorKind<'i>) -> Self {
+        StyleParseErrorKind::ValueError(this)
+    }
+}
+
+impl<'i> From<SelectorParseErrorKind<'i>> for StyleParseErrorKind<'i> {
+    fn from(this: SelectorParseErrorKind<'i>) -> Self {
+        StyleParseErrorKind::SelectorError(this)
+    }
+}
+
+/// Specific errors that can be encountered while parsing property values.
+#[derive(Clone, Debug, PartialEq)]
+pub enum ValueParseErrorKind<'i> {
+    /// An invalid token was encountered while parsing a color value.
+    InvalidColor(Token<'i>),
+    /// An invalid filter value was encountered.
+    InvalidFilter(Token<'i>),
+}
+
+impl<'i> StyleParseErrorKind<'i> {
+    /// Create an InvalidValue parse error
+    pub fn new_invalid<S>(name: S, value_error: ParseError<'i>) -> ParseError<'i>
+    where
+        S: Into<CowRcStr<'i>>,
+    {
+        let name = name.into();
+        let variant = match value_error.kind {
+            cssparser::ParseErrorKind::Custom(StyleParseErrorKind::ValueError(e)) => match e {
+                ValueParseErrorKind::InvalidColor(token) => {
+                    StyleParseErrorKind::InvalidColor(name, token)
+                },
+                ValueParseErrorKind::InvalidFilter(token) => {
+                    StyleParseErrorKind::InvalidFilter(name, token)
+                },
+            },
+            _ => StyleParseErrorKind::OtherInvalidValue(name),
+        };
+        cssparser::ParseError {
+            kind: cssparser::ParseErrorKind::Custom(variant),
+            location: value_error.location,
+        }
+    }
+}
+
+/// Errors that can be encountered while parsing the @property rule's syntax descriptor.
+#[derive(Clone, Debug, PartialEq)]
+pub enum PropertySyntaxParseError {
+    /// The string's length was 0.
+    EmptyInput,
+    /// A non-whitespace, non-pipe character was fount after parsing a component.
+    ExpectedPipeBetweenComponents,
+    /// The start of an identifier was expected but not found.
+    ///
+    /// <https://drafts.csswg.org/css-syntax-3/#name-start-code-point>
+    InvalidNameStart,
+    /// The name is not a valid `<ident>`.
+    InvalidName,
+    /// The data type name was not closed.
+    ///
+    /// <https://drafts.css-houdini.org/css-properties-values-api-1/#consume-data-type-name>
+    UnclosedDataTypeName,
+    /// The next byte was expected while parsing, but EOF was found instead.
+    UnexpectedEOF,
+    /// The data type is not a supported syntax component name.
+    ///
+    /// <https://drafts.css-houdini.org/css-properties-values-api-1/#supported-names>
+    UnknownDataTypeName,
+}
+
+bitflags! {
+    /// The mode to use when parsing values.
+    #[derive(Clone, Copy, Eq, PartialEq)]
+    pub struct ParsingMode: u8 {
+        /// In CSS; lengths must have units, except for zero values, where the unit can be omitted.
+        /// <https://www.w3.org/TR/css3-values/#lengths>
+        const DEFAULT = 0x00;
+        /// In SVG; a coordinate or length value without a unit identifier (e.g., "25") is assumed
+        /// to be in user units (px).
+        /// <https://www.w3.org/TR/SVG/coords.html#Units>
+        const ALLOW_UNITLESS_LENGTH = 0x01;
+        /// In SVG; out-of-range values are not treated as an error in parsing.
+        /// <https://www.w3.org/TR/SVG/implnote.html#RangeClamping>
+        const ALLOW_ALL_NUMERIC_VALUES = 0x02;
+    }
+}
+
+impl ParsingMode {
+    /// Whether the parsing mode allows unitless lengths for non-zero values to be intpreted as px.
+    #[inline]
+    pub fn allows_unitless_lengths(&self) -> bool {
+        self.intersects(ParsingMode::ALLOW_UNITLESS_LENGTH)
+    }
+
+    /// Whether the parsing mode allows all numeric values.
+    #[inline]
+    pub fn allows_all_numeric_values(&self) -> bool {
+        self.intersects(ParsingMode::ALLOW_ALL_NUMERIC_VALUES)
+    }
+}
+
+#[cfg(feature = "servo")]
+/// Speculatively execute paint code in the worklet thread pool.
+pub trait SpeculativePainter: Send + Sync {
+    /// <https://drafts.css-houdini.org/css-paint-api/#draw-a-paint-image>
+    fn speculatively_draw_a_paint_image(
+        &self,
+        properties: Vec<(Atom, String)>,
+        arguments: Vec<String>,
+    );
+}