servo/components/style/properties/longhand/column.mako.rs

/* 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/. */

<%namespace name="helpers" file="/helpers.mako.rs" />

<% data.new_style_struct("Column", inherited=False) %>

// FIXME: This prop should be animatable.
<%helpers:longhand name="column-width" experimental="True" animatable="False">
    use cssparser::ToCss;
    use std::fmt;
    use values::LocalToCss;
    use values::HasViewportPercentage;

    impl HasViewportPercentage for SpecifiedValue {
        fn has_viewport_percentage(&self) -> bool {
            match *self {
                SpecifiedValue::Specified(length) => length.has_viewport_percentage(),
                _ => false
            }
        }
    }

    #[derive(Debug, Clone, Copy, PartialEq)]
    #[cfg_attr(feature = "servo", derive(HeapSizeOf))]
    pub enum SpecifiedValue {
        Auto,
        Specified(specified::Length),
    }

    impl ToCss for SpecifiedValue {
        fn to_css<W>(&self, dest: &mut W) -> fmt::Result where W: fmt::Write {
            match *self {
                SpecifiedValue::Auto => dest.write_str("auto"),
                SpecifiedValue::Specified(l) => l.to_css(dest),
            }
        }
    }

    pub mod computed_value {
        use app_units::Au;
        #[derive(Debug, Clone, PartialEq)]
        #[cfg_attr(feature = "servo", derive(HeapSizeOf))]
        pub struct T(pub Option<Au>);
    }

    impl ToCss for computed_value::T {
        fn to_css<W>(&self, dest: &mut W) -> fmt::Result where W: fmt::Write {
            match self.0 {
                None => dest.write_str("auto"),
                Some(l) => l.to_css(dest),
            }
        }
    }

    #[inline]
    pub fn get_initial_value() -> computed_value::T {
        computed_value::T(None)
    }

    impl ToComputedValue for SpecifiedValue {
        type ComputedValue = computed_value::T;

        #[inline]
        fn to_computed_value(&self, context: &Context) -> computed_value::T {
            match *self {
                SpecifiedValue::Auto => computed_value::T(None),
                SpecifiedValue::Specified(l) =>
                    computed_value::T(Some(l.to_computed_value(context)))
            }
        }
    }

    pub fn parse(_context: &ParserContext, input: &mut Parser) -> Result<SpecifiedValue, ()> {
        if input.try(|input| input.expect_ident_matching("auto")).is_ok() {
            Ok(SpecifiedValue::Auto)
        } else {
            specified::Length::parse_non_negative(input).map(SpecifiedValue::Specified)
        }
    }
</%helpers:longhand>

// FIXME: This prop should be animatable.
<%helpers:longhand name="column-count" experimental="True" animatable="False">
    use cssparser::ToCss;
    use std::fmt;
    use values::NoViewportPercentage;

    impl NoViewportPercentage for SpecifiedValue {}

    #[derive(Debug, Clone, Copy, PartialEq)]
    #[cfg_attr(feature = "servo", derive(HeapSizeOf))]
    pub enum SpecifiedValue {
        Auto,
        Specified(u32),
    }

    impl ToCss for SpecifiedValue {
        fn to_css<W>(&self, dest: &mut W) -> fmt::Result where W: fmt::Write {
            match *self {
                SpecifiedValue::Auto => dest.write_str("auto"),
                SpecifiedValue::Specified(count) => write!(dest, "{}", count),
            }
        }
    }

    pub mod computed_value {
        #[derive(Debug, Clone, PartialEq)]
        #[cfg_attr(feature = "servo", derive(HeapSizeOf))]
        pub struct T(pub Option<u32>);
    }

    impl ToCss for computed_value::T {
        fn to_css<W>(&self, dest: &mut W) -> fmt::Result where W: fmt::Write {
            match self.0 {
                None => dest.write_str("auto"),
                Some(count) => write!(dest, "{}", count),
            }
        }
    }

    #[inline]
    pub fn get_initial_value() -> computed_value::T {
        computed_value::T(None)
    }

    impl ToComputedValue for SpecifiedValue {
        type ComputedValue = computed_value::T;

        #[inline]
        fn to_computed_value(&self, _context: &Context) -> computed_value::T {
            match *self {
                SpecifiedValue::Auto => computed_value::T(None),
                SpecifiedValue::Specified(count) =>
                    computed_value::T(Some(count))
            }
        }
    }

    pub fn parse(_context: &ParserContext, input: &mut Parser) -> Result<SpecifiedValue, ()> {
        if input.try(|input| input.expect_ident_matching("auto")).is_ok() {
            Ok(SpecifiedValue::Auto)
        } else {
            let count = try!(specified::parse_integer(input));
            // Zero is invalid
            if count <= 0 {
                return Err(())
            }
            Ok(SpecifiedValue::Specified(count as u32))
        }
    }
</%helpers:longhand>

// FIXME: This prop should be animatable.
<%helpers:longhand name="column-gap" experimental="True" products="servo" animatable="False">
    use cssparser::ToCss;
    use std::fmt;
    use values::LocalToCss;
    use values::HasViewportPercentage;

    impl HasViewportPercentage for SpecifiedValue {
        fn has_viewport_percentage(&self) -> bool {
            match *self {
                SpecifiedValue::Specified(length) => length.has_viewport_percentage(),
                _ => false
            }
        }
    }

    #[derive(Debug, Clone, Copy, PartialEq)]
    #[cfg_attr(feature = "servo", derive(HeapSizeOf))]
    pub enum SpecifiedValue {
        Normal,
        Specified(specified::Length),
    }

    impl ToCss for SpecifiedValue {
        fn to_css<W>(&self, dest: &mut W) -> fmt::Result where W: fmt::Write {
            match *self {
                SpecifiedValue::Normal => dest.write_str("normal"),
                SpecifiedValue::Specified(l) => l.to_css(dest),
            }
        }
    }

    pub mod computed_value {
        use app_units::Au;
        #[derive(Debug, Clone, PartialEq)]
        #[cfg_attr(feature = "servo", derive(HeapSizeOf))]
        pub struct T(pub Option<Au>);
    }

    impl ToCss for computed_value::T {
        fn to_css<W>(&self, dest: &mut W) -> fmt::Result where W: fmt::Write {
            match self.0 {
                None => dest.write_str("normal"),
                Some(l) => l.to_css(dest),
            }
        }
    }

    #[inline]
    pub fn get_initial_value() -> computed_value::T {
        computed_value::T(None)
    }

    impl ToComputedValue for SpecifiedValue {
        type ComputedValue = computed_value::T;

        #[inline]
        fn to_computed_value(&self, context: &Context) -> computed_value::T {
            match *self {
                SpecifiedValue::Normal => computed_value::T(None),
                SpecifiedValue::Specified(l) =>
                    computed_value::T(Some(l.to_computed_value(context)))
            }
        }
    }

    pub fn parse(_context: &ParserContext, input: &mut Parser) -> Result<SpecifiedValue, ()> {
        if input.try(|input| input.expect_ident_matching("normal")).is_ok() {
            Ok(SpecifiedValue::Normal)
        } else {
            specified::Length::parse_non_negative(input).map(SpecifiedValue::Specified)
        }
    }
</%helpers:longhand>