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style: Introduce a generic way of gathering information from the cascade, and use it for viewport units.

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This commit is contained in:
Emilio Cobos Álvarez 2016-08-12 16:30:35 -07:00
parent 40c04b4c6b
commit 9e88a495c8
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GPG key ID: 056B727BB9C1027C
12 changed files with 205 additions and 23 deletions
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14
components/style/properties/helpers.mako.rs
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@ -167,6 +167,7 @@
use parser::{ParserContext, ParserContextExtraData};
use properties::{CSSWideKeyword, DeclaredValue, Shorthand};
% endif
use cascade_info::CascadeInfo;
use error_reporting::ParseErrorReporter;
use properties::longhands;
use properties::property_bit_field::PropertyBitField;
@ -185,6 +186,7 @@
context: &mut computed::Context,
seen: &mut PropertyBitField,
cacheable: &mut bool,
cascade_info: &mut Option<<&mut CascadeInfo>,
error_reporter: &mut StdBox<ParseErrorReporter + Send>) {
let declared_value = match *declaration {
PropertyDeclaration::${property.camel_case}(ref declared_value) => {
@ -200,7 +202,13 @@
{
let custom_props = context.style().custom_properties();
::properties::substitute_variables_${property.ident}(
declared_value, &custom_props, |value| match *value {
declared_value, &custom_props,
|value| {
if let Some(ref mut cascade_info) = *cascade_info {
cascade_info.on_cascade_property(&declaration,
&value);
}
match *value {
DeclaredValue::Value(ref specified_value) => {
let computed = specified_value.to_computed_value(context);
context.mutate_style().mutate_${data.current_style_struct.name_lower}()
@ -226,8 +234,8 @@
context.mutate_style().mutate_${data.current_style_struct.name_lower}()
.copy_${property.ident}_from(inherited_struct);
}
}, error_reporter
);
}
}, error_reporter);
}
% if property.custom_cascade: