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Bug 1035774 - Factor out a function getting the windows power platform role. r=masayuki

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Differential Revision: https://phabricator.services.mozilla.com/D3299
This commit is contained in:
Thomas Wisniewski 2018-08-14 16:38:03 +09:00
parent ef03e2a299
commit d82fa0f0c9
3 changed files with 24 additions and 9 deletions
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10
widget/windows/WinIMEHandler.cpp
View File

@ -835,17 +835,9 @@ IMEHandler::NeedOnScreenKeyboard()
// checked by first checking the role of the device and then the
// corresponding system metric (SM_CONVERTIBLESLATEMODE). If it is being
// used as a tablet then we want the OSK to show up.
typedef POWER_PLATFORM_ROLE (WINAPI* PowerDeterminePlatformRoleEx)(ULONG Version);
if (!sDeterminedPowerPlatformRole) {
sDeterminedPowerPlatformRole = true;
PowerDeterminePlatformRoleEx power_determine_platform_role =
reinterpret_cast<PowerDeterminePlatformRoleEx>(::GetProcAddress(
::LoadLibraryW(L"PowrProf.dll"), "PowerDeterminePlatformRoleEx"));
if (power_determine_platform_role) {
sPowerPlatformRole = power_determine_platform_role(POWER_PLATFORM_ROLE_V2);
} else {
sPowerPlatformRole = PlatformRoleUnspecified;
}
sPowerPlatformRole = WinUtils::GetPowerPlatformRole();
}
// If this a mobile or slate (tablet) device, check if it is in slate mode.

18
widget/windows/WinUtils.cpp
View File

@ -1784,6 +1784,24 @@ WinUtils::GetMaxTouchPoints()
return 0;
}
/* static */
POWER_PLATFORM_ROLE
WinUtils::GetPowerPlatformRole()
{
typedef POWER_PLATFORM_ROLE (WINAPI* PowerDeterminePlatformRoleEx)
(ULONG Version);
static PowerDeterminePlatformRoleEx power_determine_platform_role =
reinterpret_cast<PowerDeterminePlatformRoleEx>(::GetProcAddress(
::LoadLibraryW(L"PowrProf.dll"), "PowerDeterminePlatformRoleEx"));
POWER_PLATFORM_ROLE powerPlatformRole = PlatformRoleUnspecified;
if (!power_determine_platform_role) {
return powerPlatformRole;
}
return power_determine_platform_role(POWER_PLATFORM_ROLE_V2);
}
/* static */
bool
WinUtils::ResolveJunctionPointsAndSymLinks(std::wstring& aPath)

5
widget/windows/WinUtils.h
View File

@ -469,6 +469,11 @@ public:
*/
static uint32_t GetMaxTouchPoints();
/**
* Returns the windows power platform role, which is useful for detecting tablets.
*/
static POWER_PLATFORM_ROLE GetPowerPlatformRole();
/**
* Fully resolves a path to its final path name. So if path contains
* junction points or symlinks to other folders, we'll resolve the path