зеркало из https://github.com/mozilla/gecko-dev.git
servo: Merge #14104 - Adds scroll-snap-type shorthand property (from iamrohit7:scroll-snap-type); r=Manishearth,waffles
<!-- Please describe your changes on the following line: --> Follow up to #14017 --- r=Manishearth <!-- Thank you for contributing to Servo! Please replace each `[ ]` by `[X]` when the step is complete, and replace `__` with appropriate data: --> - [X] `./mach build -d` does not report any errors - [X] `./mach test-tidy` does not report any errors <!-- Either: --> - [X] There are tests for these changes `scroll_snap_type::should_serialize_to_single_value_if_sub_types_are_equal`, `scroll_snap_type::should_serialize_to_empty_string_if_sub_types_not_equal` <!-- Pull requests that do not address these steps are welcome, but they will require additional verification as part of the review process. --> Source-Repo: https://github.com/servo/servo Source-Revision: 395981742475612eac7ef0bd484b4ae1bc1dd4a8
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Коммит
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@ -214,16 +214,13 @@ impl PropertyDeclarationBlock {
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if !self.declarations.iter().all(|decl| decl.0.shorthands().contains(&shorthand)) {
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return Err(fmt::Error)
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}
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let success = try!(shorthand.serialize_shorthand_to_buffer(
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dest,
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self.declarations.iter()
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.map(get_declaration as fn(_) -> _),
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&mut true)
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);
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if success {
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Ok(())
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} else {
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Err(fmt::Error)
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let iter = self.declarations.iter().map(get_declaration as fn(_) -> _);
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match shorthand.get_shorthand_appendable_value(iter) {
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Some(AppendableValue::Css(css)) => dest.write_str(css),
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Some(AppendableValue::DeclarationsForShorthand(_, decls)) => {
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shorthand.longhands_to_css(decls, dest)
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}
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_ => Ok(())
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}
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}
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}
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@ -978,7 +978,8 @@ fn static_assert() {
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<% skip_box_longhands= """display overflow-y vertical-align
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-moz-binding page-break-before page-break-after
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scroll-snap-points-x scroll-snap-points-y transform""" %>
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scroll-snap-points-x scroll-snap-points-y transform
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scroll-snap-type-y""" %>
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<%self:impl_trait style_struct_name="Box" skip_longhands="${skip_box_longhands}">
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// We manually-implement the |display| property until we get general
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@ -1220,6 +1221,11 @@ fn static_assert() {
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pub fn copy_transform_from(&mut self, other: &Self) {
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unsafe { self.gecko.mSpecifiedTransform.set(&other.gecko.mSpecifiedTransform); }
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}
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<% scroll_snap_type_keyword = Keyword("scroll-snap-type", "none mandatory proximity") %>
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${impl_keyword('scroll_snap_type_y', 'mScrollSnapTypeY', scroll_snap_type_keyword, need_clone=False)}
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</%self:impl_trait>
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<%def name="simple_image_array_property(name, shorthand, field_name)">
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@ -1474,11 +1474,12 @@ ${helpers.single_keyword("scroll-snap-type-x",
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animatable=False)}
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// Non-standard: https://developer.mozilla.org/en-US/docs/Web/CSS/scroll-snap-type-y
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${helpers.single_keyword("scroll-snap-type-y",
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"none mandatory proximity",
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products="gecko",
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gecko_constant_prefix="NS_STYLE_SCROLL_SNAP_TYPE",
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animatable=False)}
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<%helpers:longhand products="gecko" name="scroll-snap-type-y" animatable="False">
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pub use super::scroll_snap_type_x::SpecifiedValue;
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pub use super::scroll_snap_type_x::computed_value;
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pub use super::scroll_snap_type_x::get_initial_value;
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pub use super::scroll_snap_type_x::parse;
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</%helpers:longhand>
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// Compositing and Blending Level 1
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// http://www.w3.org/TR/compositing-1/
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@ -297,3 +297,37 @@ macro_rules! try_parse_one {
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}
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}
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</%helpers:shorthand>
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<%helpers:shorthand name="scroll-snap-type" products="gecko"
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sub_properties="scroll-snap-type-x scroll-snap-type-y">
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use properties::longhands::scroll_snap_type_x;
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pub fn parse_value(context: &ParserContext, input: &mut Parser) -> Result<Longhands, ()> {
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let result = try!(scroll_snap_type_x::parse(context, input));
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Ok(Longhands {
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scroll_snap_type_x: Some(result),
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scroll_snap_type_y: Some(result),
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})
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}
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impl<'a> LonghandsToSerialize<'a> {
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// Serializes into the single keyword value if both scroll-snap-type and scroll-snap-type-y are same.
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// Otherwise into an empty string. This is done to match Gecko's behaviour.
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fn to_css_declared<W>(&self, dest: &mut W) -> fmt::Result where W: fmt::Write {
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let x_and_y_equal = match (self.scroll_snap_type_x, self.scroll_snap_type_y) {
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(&DeclaredValue::Value(ref x_value), &DeclaredValue::Value(ref y_value)) => {
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*x_value == *y_value
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},
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(&DeclaredValue::Initial, &DeclaredValue::Initial) => true,
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(&DeclaredValue::Inherit, &DeclaredValue::Inherit) => true,
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(x, y) => { *x == *y },
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};
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if x_and_y_equal {
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self.scroll_snap_type_x.to_css(dest)
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} else {
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Ok(())
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}
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}
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}
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</%helpers:shorthand>
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@ -1006,4 +1006,53 @@ mod shorthand_serialization {
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);
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}
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}
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mod scroll_snap_type {
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pub use super::*;
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use style::properties::longhands::scroll_snap_type_x::computed_value::T as ScrollSnapTypeXValue;
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#[test]
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fn should_serialize_to_empty_string_if_sub_types_not_equal() {
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let declarations = vec![
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(PropertyDeclaration::ScrollSnapTypeX(DeclaredValue::Value(ScrollSnapTypeXValue::mandatory)),
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Importance::Normal),
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(PropertyDeclaration::ScrollSnapTypeY(DeclaredValue::Value(ScrollSnapTypeXValue::none)),
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Importance::Normal)
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];
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let block = PropertyDeclarationBlock {
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declarations: declarations,
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important_count: 0
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};
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let mut s = String::new();
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let x = block.single_value_to_css("scroll-snap-type", &mut s);
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assert_eq!(x.is_ok(), true);
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assert_eq!(s, "");
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}
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#[test]
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fn should_serialize_to_single_value_if_sub_types_are_equal() {
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let declarations = vec![
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(PropertyDeclaration::ScrollSnapTypeX(DeclaredValue::Value(ScrollSnapTypeXValue::mandatory)),
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Importance::Normal),
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(PropertyDeclaration::ScrollSnapTypeY(DeclaredValue::Value(ScrollSnapTypeXValue::mandatory)),
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Importance::Normal)
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];
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let block = PropertyDeclarationBlock {
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declarations: declarations,
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important_count: 0
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};
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let mut s = String::new();
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let x = block.single_value_to_css("scroll-snap-type", &mut s);
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assert_eq!(x.is_ok(), true);
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assert_eq!(s, "mandatory");
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}
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}
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}
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