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// Copyright 2020 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "ui/base/cocoa/permissions_utils.h"
#include <CoreGraphics/CoreGraphics.h>
#include <Foundation/Foundation.h>
#include "base/mac/foundation_util.h"
#include "base/mac/mac_util.h"
#include "base/mac/scoped_cftyperef.h"
namespace ui {
// Screen Capture is considered allowed if the name of at least one normal
// or dock window running on another process is visible.
// See https://crbug.com/993692.
bool IsScreenCaptureAllowed() {
if (base::mac::IsAtLeastOS10_15()) {
base::ScopedCFTypeRef<CFArrayRef> window_list(
CGWindowListCopyWindowInfo(kCGWindowListOptionAll, kCGNullWindowID));
int current_pid = [[NSProcessInfo processInfo] processIdentifier];
for (NSDictionary* window in base::mac::CFToNSCast(window_list.get())) {
NSNumber* window_pid =
[window objectForKey:base::mac::CFToNSCast(kCGWindowOwnerPID)];
if (!window_pid || [window_pid integerValue] == current_pid)
continue;
NSString* window_name =
[window objectForKey:base::mac::CFToNSCast(kCGWindowName)];
if (!window_name)
continue;
NSNumber* layer =
[window objectForKey:base::mac::CFToNSCast(kCGWindowLayer)];
if (!layer)
continue;
NSInteger layer_integer = [layer integerValue];
if (layer_integer == CGWindowLevelForKey(kCGNormalWindowLevelKey) ||
layer_integer == CGWindowLevelForKey(kCGDockWindowLevelKey)) {
return true;
}
}
return false;
}
// Screen capture is always allowed in older macOS versions.
return true;
}
bool TryPromptUserForScreenCapture() {
if (base::mac::IsAtLeastOS10_15()) {
// On 10.15+, macOS will show the permissions prompt for Screen Recording
// if we request to create a display stream and our application is not
// in the applications list in System permissions. Stream creation will
// fail if the user denies permission, or if our application is already
// in the system permssion and is unchecked.
base::ScopedCFTypeRef<CGDisplayStreamRef> stream(CGDisplayStreamCreate(
CGMainDisplayID(), 1, 1, 'BGRA', nullptr,
^(CGDisplayStreamFrameStatus status, uint64_t displayTime,
IOSurfaceRef frameSurface, CGDisplayStreamUpdateRef updateRef){
}));
return stream != nullptr;
} else {
return true;
}
}
} // namespace ui
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