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style: Implement any-hover and any-pointer media queries features.

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Differential Revision: https://phabricator.services.mozilla.com/D3609
This commit is contained in:
Hiroyuki Ikezoe 2018-08-17 20:29:37 +09:00 • committed by Emilio Cobos Álvarez
parent 9354a42fc1
commit 3d909132ba
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GPG key ID: 056B727BB9C1027C
1 changed files with 53 additions and 13 deletions
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66
components/style/gecko/media_features.rs
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@ -310,6 +310,18 @@ bitflags! {
}
}
fn primary_pointer_capabilities(device: &Device) -> PointerCapabilities {
PointerCapabilities::from_bits_truncate(
unsafe { bindings::Gecko_MediaFeatures_PrimaryPointerCapabilities(device.document()) }
)
}
fn all_pointer_capabilities(device: &Device) -> PointerCapabilities {
PointerCapabilities::from_bits_truncate(
unsafe { bindings::Gecko_MediaFeatures_AllPointerCapabilities(device.document()) }
)
}
#[derive(Debug, Copy, Clone, FromPrimitive, ToCss, Parse)]
#[repr(u8)]
enum Pointer {
@ -318,15 +330,10 @@ enum Pointer {
Fine,
}
fn primary_pointer_capabilities(device: &Device) -> PointerCapabilities {
PointerCapabilities::from_bits_truncate(
unsafe { bindings::Gecko_MediaFeatures_PrimaryPointerCapabilities(device.document()) }
)
}
/// https://drafts.csswg.org/mediaqueries-4/#pointer
fn eval_pointer(device: &Device, query_value: Option<Pointer>) -> bool {
let pointer_capabilities = primary_pointer_capabilities(device);
fn eval_pointer_capabilities(
query_value: Option<Pointer>,
pointer_capabilities: PointerCapabilities,
) -> bool {
let query_value = match query_value {
Some(v) => v,
None => return !pointer_capabilities.is_empty(),
@ -339,6 +346,16 @@ fn eval_pointer(device: &Device, query_value: Option<Pointer>) -> bool {
}
}
/// https://drafts.csswg.org/mediaqueries-4/#pointer
fn eval_pointer(device: &Device, query_value: Option<Pointer>) -> bool {
eval_pointer_capabilities(query_value, primary_pointer_capabilities(device))
}
/// https://drafts.csswg.org/mediaqueries-4/#descdef-media-any-pointer
fn eval_any_pointer(device: &Device, query_value: Option<Pointer>) -> bool {
eval_pointer_capabilities(query_value, all_pointer_capabilities(device))
}
#[derive(Debug, Copy, Clone, FromPrimitive, ToCss, Parse)]
#[repr(u8)]
enum Hover {
@ -346,9 +363,10 @@ enum Hover {
Hover,
}
/// https://drafts.csswg.org/mediaqueries-4/#hover
fn eval_hover(device: &Device, query_value: Option<Hover>) -> bool {
let pointer_capabilities = primary_pointer_capabilities(device);
fn eval_hover_capabilities(
query_value: Option<Hover>,
pointer_capabilities: PointerCapabilities,
) -> bool {
let can_hover = pointer_capabilities.intersects(PointerCapabilities::HOVER);
let query_value = match query_value {
Some(v) => v,
@ -361,6 +379,16 @@ fn eval_hover(device: &Device, query_value: Option<Hover>) -> bool {
}
}
/// https://drafts.csswg.org/mediaqueries-4/#hover
fn eval_hover(device: &Device, query_value: Option<Hover>) -> bool {
eval_hover_capabilities(query_value, primary_pointer_capabilities(device))
}
/// https://drafts.csswg.org/mediaqueries-4/#descdef-media-any-hover
fn eval_any_hover(device: &Device, query_value: Option<Hover>) -> bool {
eval_hover_capabilities(query_value, all_pointer_capabilities(device))
}
fn eval_moz_is_glyph(
device: &Device,
query_value: Option<bool>,
@ -451,7 +479,7 @@ lazy_static! {
/// to support new types in these entries and (2) ensuring that either
/// nsPresContext::MediaFeatureValuesChanged is called when the value that
/// would be returned by the evaluator function could change.
pub static ref MEDIA_FEATURES: [MediaFeatureDescription; 45] = [
pub static ref MEDIA_FEATURES: [MediaFeatureDescription; 47] = [
feature!(
atom!("width"),
AllowsRanges::Yes,
@ -576,12 +604,24 @@ lazy_static! {
keyword_evaluator!(eval_pointer, Pointer),
ParsingRequirements::empty(),
),
feature!(
atom!("any-pointer"),
AllowsRanges::No,
keyword_evaluator!(eval_any_pointer, Pointer),
ParsingRequirements::empty(),
),
feature!(
atom!("hover"),
AllowsRanges::No,
keyword_evaluator!(eval_hover, Hover),
ParsingRequirements::empty(),
),
feature!(
atom!("any-hover"),
AllowsRanges::No,
keyword_evaluator!(eval_any_hover, Hover),
ParsingRequirements::empty(),
),
// Internal -moz-is-glyph media feature: applies only inside SVG glyphs.
// Internal because it is really only useful in the user agent anyway