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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 http://mozilla.org/MPL/2.0/. */
<%! from data import Keyword, to_rust_ident %>
<%def name="longhand(name, **kwargs)">
<%call expr="raw_longhand(name, **kwargs)">
${caller.body()}
% if not data.longhands_by_name[name].derived_from:
pub fn parse_specified(context: &ParserContext, input: &mut Parser)
-> Result<DeclaredValue<SpecifiedValue>, ()> {
parse(context, input).map(DeclaredValue::Value)
}
% endif
</%call>
</%def>
<%def name="predefined_type(name, type, initial_value, parse_method='parse', **kwargs)">
<%call expr="longhand(name, predefined_type=type, **kwargs)">
#[allow(unused_imports)]
use app_units::Au;
use cssparser::{Color as CSSParserColor, RGBA};
pub type SpecifiedValue = specified::${type};
pub mod computed_value {
pub use values::computed::${type} as T;
}
#[inline] pub fn get_initial_value() -> computed_value::T { ${initial_value} }
#[inline] pub fn parse(_context: &ParserContext, input: &mut Parser)
-> Result<SpecifiedValue, ()> {
specified::${type}::${parse_method}(input)
}
</%call>
</%def>
<%def name="raw_longhand(*args, **kwargs)">
<%
property = data.declare_longhand(*args, **kwargs)
if property is None:
return ""
%>
pub mod ${property.ident} {
#![allow(unused_imports)]
% if not property.derived_from:
use cssparser::Parser;
use parser::ParserContext;
use properties::{CSSWideKeyword, DeclaredValue, Shorthand};
% endif
use error_reporting::ParseErrorReporter;
use properties::longhands;
use properties::property_bit_field::PropertyBitField;
use properties::{ComputedValues, ServoComputedValues, PropertyDeclaration};
use properties::style_struct_traits::${data.current_style_struct.trait_name};
use properties::style_structs;
use std::boxed::Box as StdBox;
use std::collections::HashMap;
use std::sync::Arc;
use values::computed::{TContext, ToComputedValue};
use values::{computed, specified};
use string_cache::Atom;
${caller.body()}
#[allow(unused_variables)]
pub fn cascade_property<C: ComputedValues>(
declaration: &PropertyDeclaration,
inherited_style: &C,
context: &mut computed::Context<C>,
seen: &mut PropertyBitField,
cacheable: &mut bool,
error_reporter: &mut StdBox<ParseErrorReporter + Send>) {
let declared_value = match *declaration {
PropertyDeclaration::${property.camel_case}(ref declared_value) => {
declared_value
}
_ => panic!("entered the wrong cascade_property() implementation"),
};
% if not property.derived_from:
if seen.get_${property.ident}() {
return
}
seen.set_${property.ident}();
{
let custom_props = context.style().custom_properties();
::properties::substitute_variables_${property.ident}(
declared_value, &custom_props, |value| match *value {
DeclaredValue::Value(ref specified_value) => {
let computed = specified_value.to_computed_value(context);
context.mutate_style().mutate_${data.current_style_struct.trait_name_lower}()
.set_${property.ident}(computed);
}
DeclaredValue::WithVariables { .. } => unreachable!(),
DeclaredValue::Initial => {
// We assume that it's faster to use copy_*_from rather than
// set_*(get_initial_value());
let initial_struct = C::initial_values()
.get_${data.current_style_struct.trait_name_lower}();
context.mutate_style().mutate_${data.current_style_struct.trait_name_lower}()
.copy_${property.ident}_from(initial_struct);
},
DeclaredValue::Inherit => {
// This is a bit slow, but this is rare so it shouldn't
// matter.
//
// FIXME: is it still?
*cacheable = false;
let inherited_struct =
inherited_style.get_${data.current_style_struct.trait_name_lower}();
context.mutate_style().mutate_${data.current_style_struct.trait_name_lower}()
.copy_${property.ident}_from(inherited_struct);
}
}, error_reporter
);
}
% if property.custom_cascade:
cascade_property_custom(declaration,
inherited_style,
context,
seen,
cacheable,
error_reporter);
% endif
% else:
// Do not allow stylesheets to set derived properties.
% endif
}
% if not property.derived_from:
pub fn parse_declared(context: &ParserContext, input: &mut Parser)
-> Result<DeclaredValue<SpecifiedValue>, ()> {
match input.try(CSSWideKeyword::parse) {
Ok(CSSWideKeyword::InheritKeyword) => Ok(DeclaredValue::Inherit),
Ok(CSSWideKeyword::InitialKeyword) => Ok(DeclaredValue::Initial),
Ok(CSSWideKeyword::UnsetKeyword) => Ok(DeclaredValue::${
"Inherit" if data.current_style_struct.inherited else "Initial"}),
Err(()) => {
input.look_for_var_functions();
let start = input.position();
let specified = parse_specified(context, input);
if specified.is_err() {
while let Ok(_) = input.next() {} // Look for var() after the error.
}
let var = input.seen_var_functions();
if specified.is_err() && var {
input.reset(start);
let (first_token_type, css) = try!(
::custom_properties::parse_non_custom_with_var(input));
return Ok(DeclaredValue::WithVariables {
css: css.into_owned(),
first_token_type: first_token_type,
base_url: context.base_url.clone(),
from_shorthand: None,
})
}
specified
}
}
}
% endif
}
</%def>
<%def name="single_keyword(name, values, **kwargs)">
<%call expr="single_keyword_computed(name, values, **kwargs)">
use values::computed::ComputedValueAsSpecified;
impl ComputedValueAsSpecified for SpecifiedValue {}
</%call>
</%def>
<%def name="single_keyword_computed(name, values, **kwargs)">
<%
keyword_kwargs = {a: kwargs.pop(a, None) for a in [
'gecko_constant_prefix', 'extra_gecko_values', 'extra_servo_values'
]}
%>
<%call expr="longhand(name, keyword=Keyword(name, values, **keyword_kwargs), **kwargs)">
pub use self::computed_value::T as SpecifiedValue;
${caller.body()}
pub mod computed_value {
define_css_keyword_enum! { T:
% for value in data.longhands_by_name[name].keyword.values_for(product):
"${value}" => ${to_rust_ident(value)},
% endfor
}
}
#[inline] pub fn get_initial_value() -> computed_value::T {
computed_value::T::${to_rust_ident(values.split()[0])}
}
pub fn parse(_context: &ParserContext, input: &mut Parser)
-> Result<SpecifiedValue, ()> {
computed_value::T::parse(input)
}
</%call>
</%def>
<%def name="shorthand(name, sub_properties, experimental=False, **kwargs)">
<%
shorthand = data.declare_shorthand(name, sub_properties.split(), experimental=experimental,
**kwargs)
%>
% if shorthand:
pub mod ${shorthand.ident} {
use cssparser::Parser;
use parser::ParserContext;
use properties::{longhands, PropertyDeclaration, DeclaredValue, Shorthand};
pub struct Longhands {
% for sub_property in shorthand.sub_properties:
pub ${sub_property.ident}:
Option<longhands::${sub_property.ident}::SpecifiedValue>,
% endfor
}
pub fn parse(context: &ParserContext, input: &mut Parser,
declarations: &mut Vec<PropertyDeclaration>)
-> Result<(), ()> {
input.look_for_var_functions();
let start = input.position();
let value = input.parse_entirely(|input| parse_value(context, input));
if value.is_err() {
while let Ok(_) = input.next() {} // Look for var() after the error.
}
let var = input.seen_var_functions();
if let Ok(value) = value {
% for sub_property in shorthand.sub_properties:
declarations.push(PropertyDeclaration::${sub_property.camel_case}(
match value.${sub_property.ident} {
Some(value) => DeclaredValue::Value(value),
None => DeclaredValue::Initial,
}
));
% endfor
Ok(())
} else if var {
input.reset(start);
let (first_token_type, css) = try!(
::custom_properties::parse_non_custom_with_var(input));
% for sub_property in shorthand.sub_properties:
declarations.push(PropertyDeclaration::${sub_property.camel_case}(
DeclaredValue::WithVariables {
css: css.clone().into_owned(),
first_token_type: first_token_type,
base_url: context.base_url.clone(),
from_shorthand: Some(Shorthand::${shorthand.camel_case}),
}
));
% endfor
Ok(())
} else {
Err(())
}
}
#[allow(unused_variables)]
pub fn parse_value(context: &ParserContext, input: &mut Parser) -> Result<Longhands, ()> {
${caller.body()}
}
}
% endif
</%def>
<%def name="four_sides_shorthand(name, sub_property_pattern, parser_function)">
<%self:shorthand name="${name}" sub_properties="${
' '.join(sub_property_pattern % side
for side in ['top', 'right', 'bottom', 'left'])}">
use super::parse_four_sides;
use values::specified;
let _unused = context;
let (top, right, bottom, left) = try!(parse_four_sides(input, ${parser_function}));
Ok(Longhands {
% for side in ["top", "right", "bottom", "left"]:
${to_rust_ident(sub_property_pattern % side)}: Some(${side}),
% endfor
})
</%self:shorthand>
</%def>
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