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111 lines
3.4 KiB
C++
111 lines
3.4 KiB
C++
// Copyright (c) 2012 The Chromium Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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#include "base/win/metro.h"
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#include "base/strings/string_util.h"
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namespace base {
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namespace win {
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HMODULE GetMetroModule() {
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const HMODULE kUninitialized = reinterpret_cast<HMODULE>(1);
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static HMODULE metro_module = kUninitialized;
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if (metro_module == kUninitialized) {
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// Initialize the cache, note that the initialization is idempotent
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// under the assumption that metro_driver is never unloaded, so the
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// race to this assignment is safe.
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metro_module = GetModuleHandleA("metro_driver.dll");
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if (metro_module != NULL) {
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// This must be a metro process if the metro_driver is loaded.
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DCHECK(IsMetroProcess());
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}
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}
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DCHECK(metro_module != kUninitialized);
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return metro_module;
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}
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bool IsMetroProcess() {
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enum ImmersiveState {
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kImmersiveUnknown,
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kImmersiveTrue,
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kImmersiveFalse
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};
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// The immersive state of a process can never change.
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// Look it up once and cache it here.
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static ImmersiveState state = kImmersiveUnknown;
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if (state == kImmersiveUnknown) {
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if (IsProcessImmersive(::GetCurrentProcess())) {
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state = kImmersiveTrue;
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} else {
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state = kImmersiveFalse;
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}
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}
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DCHECK_NE(kImmersiveUnknown, state);
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return state == kImmersiveTrue;
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}
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bool IsProcessImmersive(HANDLE process) {
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typedef BOOL (WINAPI* IsImmersiveProcessFunc)(HANDLE process);
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HMODULE user32 = ::GetModuleHandleA("user32.dll");
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DCHECK(user32 != NULL);
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IsImmersiveProcessFunc is_immersive_process =
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reinterpret_cast<IsImmersiveProcessFunc>(
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::GetProcAddress(user32, "IsImmersiveProcess"));
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if (is_immersive_process)
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return is_immersive_process(process) ? true: false;
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return false;
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}
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wchar_t* LocalAllocAndCopyString(const string16& src) {
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size_t dest_size = (src.length() + 1) * sizeof(wchar_t);
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wchar_t* dest = reinterpret_cast<wchar_t*>(LocalAlloc(LPTR, dest_size));
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base::wcslcpy(dest, src.c_str(), dest_size);
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return dest;
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}
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// Metro driver exports for getting the launch type, initial url, initial
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// search term, etc.
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extern "C" {
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typedef const wchar_t* (*GetInitialUrl)();
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typedef const wchar_t* (*GetInitialSearchString)();
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typedef base::win::MetroLaunchType (*GetLaunchType)(
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base::win::MetroPreviousExecutionState* previous_state);
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}
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MetroLaunchType GetMetroLaunchParams(string16* params) {
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HMODULE metro = base::win::GetMetroModule();
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if (!metro)
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return base::win::METRO_LAUNCH_ERROR;
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GetLaunchType get_launch_type = reinterpret_cast<GetLaunchType>(
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::GetProcAddress(metro, "GetLaunchType"));
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DCHECK(get_launch_type);
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base::win::MetroLaunchType launch_type = get_launch_type(NULL);
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if ((launch_type == base::win::METRO_PROTOCOL) ||
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(launch_type == base::win::METRO_LAUNCH)) {
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GetInitialUrl initial_metro_url = reinterpret_cast<GetInitialUrl>(
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::GetProcAddress(metro, "GetInitialUrl"));
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DCHECK(initial_metro_url);
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*params = initial_metro_url();
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} else if (launch_type == base::win::METRO_SEARCH) {
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GetInitialSearchString initial_search_string =
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reinterpret_cast<GetInitialSearchString>(
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::GetProcAddress(metro, "GetInitialSearchString"));
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DCHECK(initial_search_string);
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*params = initial_search_string();
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}
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return launch_type;
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}
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} // namespace win
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} // namespace base
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