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Bypass transparency optimization with HC themes.

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Don't use transparency optimization for theme items in Windows 8
or later with a high contrast theme in use.

See MoonchildProductions/Pale-Moon#1591
This commit is contained in:
wolfbeast 2018-07-26 17:58:48 +02:00 • committed by Roy Tam
commit bb95fcfca5
1 changed files with 4 additions and 1 deletions
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5
widget/windows/nsNativeThemeWin.cpp
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@ -1541,7 +1541,10 @@ nsNativeThemeWin::GetThemePartAndState(nsIFrame* aFrame, uint8_t aWidgetType,
static bool
AssumeThemePartAndStateAreTransparent(int32_t aPart, int32_t aState)
{
if (aPart == MENU_POPUPITEM && aState == MBI_NORMAL) {
// When using a high contrast theme on Windows 8 or later, we can't
// use this optimization.
if (!(IsWin8OrLater() && nsUXThemeData::IsHighContrastOn()) &&
aPart == MENU_POPUPITEM && aState == MBI_NORMAL) {
return true;
}
return false;