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style: Check for allowed colors recursively in forced-colors mode

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Differential Revision: https://phabricator.services.mozilla.com/D149733
This commit is contained in:
Emilio Cobos Álvarez 2022-06-20 14:07:12 +00:00 • committed by Martin Robinson
parent f0b7f3aca2
commit 34373c2ac8
2 changed files with 20 additions and 22 deletions
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21
components/style/properties/cascade.rs
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@ -425,13 +425,7 @@ fn tweak_when_ignoring_colors(
// A few special-cases ahead.
match **declaration {
PropertyDeclaration::BackgroundColor(ref color) => {
// We honor system colors.
if color.is_system() {
return;
}
// For background-color, we revert or initial-with-preserved-alpha
// otherwise, this is needed to preserve semi-transparent
// backgrounds.
// We honor system colors and transparent colors unconditionally.
//
// NOTE(emilio): We honor transparent unconditionally, like we do
// for color, even though it causes issues like bug 1625036. The
@ -440,6 +434,12 @@ fn tweak_when_ignoring_colors(
// broken in other applications as well, and not honoring
// transparent makes stuff uglier or break unconditionally
// (bug 1666059, bug 1755713).
if color.honored_in_forced_colors_mode(/* allow_transparent = */ true) {
return;
}
// For background-color, we revert or initial-with-preserved-alpha
// otherwise, this is needed to preserve semi-transparent
// backgrounds.
let alpha = alpha_channel(color, context);
if alpha == 0 {
return;
@ -451,10 +451,7 @@ fn tweak_when_ignoring_colors(
},
PropertyDeclaration::Color(ref color) => {
// We honor color: transparent and system colors.
if color.0.is_system() {
return;
}
if alpha_channel(&color.0, context) == 0 {
if color.0.honored_in_forced_colors_mode(/* allow_transparent = */ true) {
return;
}
// If the inherited color would be transparent, but we would
@ -491,7 +488,7 @@ fn tweak_when_ignoring_colors(
// caret-color doesn't make sense (using currentColor is fine), and
// we ignore accent-color in high-contrast-mode anyways.
if let Some(color) = declaration.color_value() {
if color.is_system() {
if color.honored_in_forced_colors_mode(/* allow_transparent = */ false) {
return;
}
}