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style: Force line-height:normal for themed comboboxes for compat with other UAs.

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Bug: 1501908
Reviewed-by: emilio
This commit is contained in:
Mats Palmgren 2018-10-28 23:00:13 +01:00 • committed by Emilio Cobos Álvarez
parent 20d9a076d4
commit a51b4e754c
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GPG key ID: 056B727BB9C1027C
1 changed files with 25 additions and 0 deletions
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25
components/style/style_adjuster.rs
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@ -9,8 +9,10 @@ use app_units::Au;
use dom::TElement;
use properties::{self, ComputedValues, StyleBuilder};
use properties::computed_value_flags::ComputedValueFlags;
use properties::longhands::_moz_appearance::computed_value::T as Appearance;
use properties::longhands::display::computed_value::T as Display;
use properties::longhands::float::computed_value::T as Float;
use properties::longhands::line_height::computed_value::T as LineHeight;
use properties::longhands::overflow_x::computed_value::T as Overflow;
use properties::longhands::position::computed_value::T as Position;
@ -694,6 +696,28 @@ impl<'a, 'b: 'a> StyleAdjuster<'a, 'b> {
.set_computed_justify_items(parent_justify_items.computed);
}
/// If '-webkit-appearance' is 'menulist' on a <select> element then
/// the computed value of 'line-height' is 'normal'.
///
/// https://github.com/w3c/csswg-drafts/issues/3257
fn adjust_for_appearance<E>(&mut self, element: Option<E>)
where
E: TElement,
{
if self.style.get_box().clone__moz_appearance() == Appearance::Menulist &&
self.style.get_inherited_text().clone_line_height() != LineHeight::normal() {
if self.style.pseudo.is_some() {
return;
}
let is_html_select_element =
element.map_or(false, |e| e.is_html_element() && e.local_name() == &*local_name!("select"));
if !is_html_select_element {
return;
}
self.style.mutate_inherited_text().set_line_height(LineHeight::normal());
}
}
/// Adjusts the style to account for various fixups that don't fit naturally
/// into the cascade.
///
@ -755,6 +779,7 @@ impl<'a, 'b: 'a> StyleAdjuster<'a, 'b> {
{
self.adjust_for_text_decorations_in_effect();
}
self.adjust_for_appearance(element);
self.set_bits();
}
}