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// Copyright 2012 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifdef UNSAFE_BUFFERS_BUILD
// TODO(crbug.com/40285824): Remove this and convert code to safer constructs.
#pragma allow_unsafe_buffers
#endif
#include "ui/base/ime/win/tsf_input_scope.h"
#include <windows.h>
#include <stddef.h>
#include "base/check.h"
#include "base/compiler_specific.h"
#include "base/containers/contains.h"
#include "base/task/current_thread.h"
#include "base/trace_event/trace_event.h"
namespace ui::tsf_inputscope {
namespace {
void AppendNonTrivialInputScope(std::vector<InputScope>* input_scopes,
InputScope input_scope) {
DCHECK(input_scopes);
if (input_scope == IS_DEFAULT)
return;
if (base::Contains(*input_scopes, input_scope))
return;
input_scopes->push_back(input_scope);
}
class TSFInputScope final : public ITfInputScope {
public:
explicit TSFInputScope(const std::vector<InputScope>& input_scopes)
: input_scopes_(input_scopes),
ref_count_(0) {}
TSFInputScope(const TSFInputScope&) = delete;
TSFInputScope& operator=(const TSFInputScope&) = delete;
// ITfInputScope:
IFACEMETHODIMP_(ULONG) AddRef() override {
return InterlockedIncrement(&ref_count_);
}
IFACEMETHODIMP_(ULONG) Release() override {
const LONG count = InterlockedDecrement(&ref_count_);
if (!count) {
delete this;
return 0;
}
return static_cast<ULONG>(count);
}
IFACEMETHODIMP QueryInterface(REFIID iid, void** result) override {
if (!result)
return E_INVALIDARG;
if (iid == IID_IUnknown || iid == IID_ITfInputScope) {
*result = static_cast<ITfInputScope*>(this);
} else {
*result = NULL;
return E_NOINTERFACE;
}
AddRef();
return S_OK;
}
IFACEMETHODIMP GetInputScopes(InputScope** input_scopes,
UINT* count) override {
if (!count || !input_scopes)
return E_INVALIDARG;
*input_scopes = static_cast<InputScope*>(CoTaskMemAlloc(
sizeof(InputScope) * input_scopes_.size()));
if (!input_scopes) {
*count = 0;
return E_OUTOFMEMORY;
}
for (size_t i = 0; i < input_scopes_.size(); ++i)
(*input_scopes)[i] = input_scopes_[i];
*count = input_scopes_.size();
return S_OK;
}
IFACEMETHODIMP GetPhrase(BSTR** phrases, UINT* count) override {
return E_NOTIMPL;
}
IFACEMETHODIMP GetRegularExpression(BSTR* regexp) override {
return E_NOTIMPL;
}
IFACEMETHODIMP GetSRGS(BSTR* srgs) override { return E_NOTIMPL; }
IFACEMETHODIMP GetXML(BSTR* xml) override { return E_NOTIMPL; }
private:
// The corresponding text input types.
std::vector<InputScope> input_scopes_;
// The reference count of this instance.
volatile ULONG ref_count_;
};
InputScope ConvertTextInputTypeToInputScope(TextInputType text_input_type) {
// Following mapping is based in IE10 on Windows 8.
switch (text_input_type) {
case TEXT_INPUT_TYPE_PASSWORD:
return IS_PASSWORD;
case TEXT_INPUT_TYPE_SEARCH:
return IS_SEARCH;
case TEXT_INPUT_TYPE_EMAIL:
return IS_EMAIL_SMTPEMAILADDRESS;
case TEXT_INPUT_TYPE_NUMBER:
return IS_NUMBER;
case TEXT_INPUT_TYPE_TELEPHONE:
return IS_TELEPHONE_FULLTELEPHONENUMBER;
case TEXT_INPUT_TYPE_URL:
return IS_URL;
default:
return IS_DEFAULT;
}
}
InputScope ConvertTextInputModeToInputScope(TextInputMode text_input_mode) {
switch (text_input_mode) {
case TEXT_INPUT_MODE_NUMERIC:
return IS_DIGITS;
case TEXT_INPUT_MODE_DECIMAL:
return IS_NUMBER;
case TEXT_INPUT_MODE_TEL:
return IS_TELEPHONE_FULLTELEPHONENUMBER;
case TEXT_INPUT_MODE_EMAIL:
return IS_EMAIL_SMTPEMAILADDRESS;
case TEXT_INPUT_MODE_URL:
return IS_URL;
case TEXT_INPUT_MODE_SEARCH:
return IS_SEARCH;
default:
return IS_DEFAULT;
}
}
} // namespace
std::vector<InputScope> GetInputScopes(TextInputType text_input_type,
TextInputMode text_input_mode) {
std::vector<InputScope> input_scopes;
AppendNonTrivialInputScope(&input_scopes,
ConvertTextInputTypeToInputScope(text_input_type));
AppendNonTrivialInputScope(&input_scopes,
ConvertTextInputModeToInputScope(text_input_mode));
if (input_scopes.empty())
input_scopes.push_back(IS_DEFAULT);
return input_scopes;
}
ITfInputScope* CreateInputScope(TextInputType text_input_type,
TextInputMode text_input_mode,
bool should_do_learning) {
std::vector<InputScope> input_scopes;
// Should set input scope to IS_PRIVATE if we are in "incognito" or "guest"
// mode.
if (!should_do_learning) {
input_scopes.push_back(IS_PRIVATE);
} else {
input_scopes = GetInputScopes(text_input_type, text_input_mode);
}
return new TSFInputScope(input_scopes);
}
typedef HRESULT(WINAPI* SetInputScopeFunc)(HWND window_handle,
InputScope input_scope);
SetInputScopeFunc g_set_input_scope = NULL;
bool g_get_set_input_scope_done = false;
void SetInputScope(HWND window_handle, InputScope input_scope) {
CHECK(base::CurrentUIThread::IsSet());
// Thread safety is not required because this function is under UI thread.
if (!g_get_set_input_scope_done) {
g_get_set_input_scope_done = true;
HMODULE module = NULL;
if (GetModuleHandleExW(GET_MODULE_HANDLE_EX_FLAG_PIN, L"msctf.dll",
&module)) {
g_set_input_scope = reinterpret_cast<SetInputScopeFunc>(
GetProcAddress(module, "SetInputScope"));
}
}
if (g_set_input_scope) {
HRESULT hr = g_set_input_scope(window_handle, input_scope);
if (hr != S_OK) {
TRACE_EVENT2("ime", "SetInputScope", "input_scope", input_scope, "hr",
hr);
}
}
}
} // namespace ui::tsf_inputscope
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