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From a94260b4f2f72ea9328a0194b8656f1fb3e98675 Mon Sep 17 00:00:00 2001
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From: =?UTF-8?q?Florian=20M=C3=BCllner?= <fmuellner@gnome.org>
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Date: Sat, 14 Dec 2019 19:15:53 +0100
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Subject: [PATCH] a11y: Change HC icon theme first
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There are two ways for applications to provide a high contrast icon:
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1. install an icon into the HighContrast theme
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2. install a symbolic icon into the default hicolor theme
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The latter is preferred nowadays, and implemented in the high-contrast
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CSS variant by enforcing the symbolic icon style.
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However together with the way we currently enable/disable high-contrast,
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this can lead to the following race:
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1. the GTK theme is changed from HighContrast
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2. we reload the default stylesheet
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3. the icon style changes to "regular", so we request a
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new icon from the HighContrast icon theme
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4. the icon theme is changed from HighContrast
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5. we evict existing icons from the cache
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6. we reload icons for the new icon theme; however as we
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find a pending request (from 3), we re-use it
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7. the request from 3 finishes, and we end up with a
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wrong icon in the cache
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The simplest fix is to change the icon theme before the GTK theme: Unlike the
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theme name, the icon style is encoded in the cache key, so we won't re-use
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an old (and incorrect) request in that case.
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---
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js/ui/status/accessibility.js | 6 +++---
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1 file changed, 3 insertions(+), 3 deletions(-)
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diff --git a/js/ui/status/accessibility.js b/js/ui/status/accessibility.js
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index 10223ec84..90948d465 100644
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--- a/js/ui/status/accessibility.js
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+++ b/js/ui/status/accessibility.js
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@@ -154,14 +154,14 @@ class ATIndicator extends PanelMenu.Button {
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interfaceSettings.is_writable(KEY_ICON_THEME),
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enabled => {
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if (enabled) {
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- interfaceSettings.set_string(KEY_GTK_THEME, HIGH_CONTRAST_THEME);
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interfaceSettings.set_string(KEY_ICON_THEME, HIGH_CONTRAST_THEME);
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+ interfaceSettings.set_string(KEY_GTK_THEME, HIGH_CONTRAST_THEME);
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} else if(!hasHC) {
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- interfaceSettings.set_string(KEY_GTK_THEME, gtkTheme);
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interfaceSettings.set_string(KEY_ICON_THEME, iconTheme);
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+ interfaceSettings.set_string(KEY_GTK_THEME, gtkTheme);
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} else {
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- interfaceSettings.reset(KEY_GTK_THEME);
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interfaceSettings.reset(KEY_ICON_THEME);
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+ interfaceSettings.reset(KEY_GTK_THEME);
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}
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});
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return highContrast;
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--
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2.23.0
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