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Record viewport unit usage and generate proper restyle hint.

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This commit is contained in:
Xidorn Quan 2017-07-25 18:20:50 +10:00
parent bf16b146e8
commit 388875ca44
4 changed files with 30 additions and 5 deletions
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15
ports/geckolib/glue.rs
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@ -865,7 +865,8 @@ pub extern "C" fn Servo_StyleSet_AppendStyleSheet(
#[no_mangle]
pub extern "C" fn Servo_StyleSet_MediumFeaturesChanged(
raw_data: RawServoStyleSetBorrowed,
) -> bool {
viewport_changed: bool,
) -> nsRestyleHint {
let global_style_data = &*GLOBAL_STYLE_DATA;
let guard = global_style_data.shared_lock.read();
@ -881,11 +882,19 @@ pub extern "C" fn Servo_StyleSet_MediumFeaturesChanged(
// less often.
let mut data = PerDocumentStyleData::from_ffi(raw_data).borrow_mut();
let viewport_units_used = data.stylist.device().used_viewport_size();
data.stylist.device_mut().reset_computed_values();
data.stylist.media_features_change_changed_style(
let rules_changed = data.stylist.media_features_change_changed_style(
data.stylesheets.iter(),
&guard,
)
);
if rules_changed {
structs::nsRestyleHint_eRestyle_Subtree
} else if viewport_changed && viewport_units_used {
structs::nsRestyleHint_eRestyle_ForceDescendants
} else {
nsRestyleHint(0)
}
}
#[no_mangle]