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// Copyright 2018 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#import "ui/base/cocoa/secure_password_input.h"
#import <Carbon/Carbon.h>
#include "base/apple/scoped_cftyperef.h"
#include "base/check_op.h"
namespace {
// Used to protect from out-of-order calls to enabling/disabling functions.
int g_password_input_counter = 0;
// SetPasswordInputEnabled() is copied from
// enableSecureTextInput() and disableSecureTextInput() functions in
// third_party/WebKit/WebCore/platform/SecureTextInput.cpp
//
// The following technote describes proper EnableSecureEventInput() usage:
// https://developer.apple.com/library/archive/technotes/tn2150/_index.html
void SetPasswordInputEnabled(bool enabled) {
if (enabled) {
EnableSecureEventInput();
CFArrayRef inputSources = TISCreateASCIICapableInputSourceList();
TSMSetDocumentProperty(/*docID=*/nullptr,
kTSMDocumentEnabledInputSourcesPropertyTag,
sizeof(CFArrayRef), &inputSources);
CFRelease(inputSources);
} else {
TSMRemoveDocumentProperty(/*docID=*/nullptr,
kTSMDocumentEnabledInputSourcesPropertyTag);
DisableSecureEventInput();
}
}
} // namespace
namespace ui {
ScopedPasswordInputEnabler::ScopedPasswordInputEnabler() {
if (!g_password_input_counter) {
SetPasswordInputEnabled(true);
}
++g_password_input_counter;
}
ScopedPasswordInputEnabler::~ScopedPasswordInputEnabler() {
--g_password_input_counter;
DCHECK_LE(0, g_password_input_counter);
if (!g_password_input_counter) {
SetPasswordInputEnabled(false);
}
}
// static
bool ScopedPasswordInputEnabler::IsPasswordInputEnabled() {
return g_password_input_counter > 0;
}
} // namespace ui
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