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Issue #1348 - Part 3: Set IS_PRIVATE input scope in private browsing.

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Microsoft IME on Windows 10 20H1 (build 19025+) supports IME private
mode by input scope. Although previous Windows versions use an
undocumented API for Edge and IE only, the next Windows 10 release will
use a public API for it.
We pre-empt this potential privacy concern by setting the IS_PRIVATE
flag when in PB mode.
This commit is contained in:
wolfbeast 2020-01-09 13:22:29 +01:00 • committed by Roy Tam
commit 1803a30a06
4 changed files with 28 additions and 9 deletions
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16
widget/windows/WinIMEHandler.cpp
View file

@ -409,7 +409,7 @@ IMEHandler::OnDestroyWindow(nsWindow* aWindow)
if (!sIsInTSFMode) {
// MSDN says we need to set IS_DEFAULT to avoid memory leak when we use
// SetInputScopes API. Use an empty string to do this.
SetInputScopeForIMM32(aWindow, EmptyString(), EmptyString());
SetInputScopeForIMM32(aWindow, EmptyString(), EmptyString(), false);
}
#endif // #ifdef NS_ENABLE_TSF
AssociateIMEContext(aWindow, true);
@ -481,8 +481,10 @@ IMEHandler::SetInputContext(nsWindow* aWindow,
}
} else {
// Set at least InputScope even when TextStore is not available.
SetInputScopeForIMM32(aWindow, aInputContext.mHTMLInputType,
aInputContext.mHTMLInputInputmode);
SetInputScopeForIMM32(aWindow,
aInputContext.mHTMLInputType,
aInputContext.mHTMLInputInputmode,
aInputContext.mInPrivateBrowsing);
}
#endif // #ifdef NS_ENABLE_TSF
@ -583,12 +585,18 @@ IMEHandler::OnKeyboardLayoutChanged()
void
IMEHandler::SetInputScopeForIMM32(nsWindow* aWindow,
const nsAString& aHTMLInputType,
const nsAString& aHTMLInputInputmode)
const nsAString& aHTMLInputInputmode,
bool aInPrivateBrowsing)
{
if (sIsInTSFMode || !sSetInputScopes || aWindow->Destroyed()) {
return;
}
AutoTArray<InputScope, 3> scopes;
if (aInPrivateBrowsing) {
scopes.AppendElement(IS_PRIVATE);
}
// http://www.whatwg.org/specs/web-apps/current-work/multipage/the-input-element.html
if (aHTMLInputType.IsEmpty() || aHTMLInputType.EqualsLiteral("text")) {
if (aHTMLInputInputmode.EqualsLiteral("url")) {