blob: 33119500ffa2c1e1a0d713f25837f312aaad4ac2 [file] [log] [blame]
// Copyright 2016 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 "chrome/utility/shell_handler_impl_win.h"
#include <objbase.h>
#include <shldisp.h>
#include "base/files/file_enumerator.h"
#include "base/files/file_path.h"
#include "base/memory/ptr_util.h"
#include "base/path_service.h"
#include "base/scoped_native_library.h"
#include "base/win/scoped_bstr.h"
#include "base/win/scoped_com_initializer.h"
#include "base/win/scoped_comptr.h"
#include "base/win/scoped_variant.h"
#include "base/win/shortcut.h"
#include "chrome/installer/util/install_util.h"
#include "content/public/utility/utility_thread.h"
#include "mojo/public/cpp/bindings/strong_binding.h"
namespace {
// This class checks if the current executable is pinned to the taskbar. It also
// keeps track of the errors that occurs that prevents it from getting a result.
class IsPinnedToTaskbarHelper {
public:
IsPinnedToTaskbarHelper() = default;
// Returns true if the current executable is pinned to the taskbar.
bool GetResult();
bool error_occured() { return error_occured_; }
private:
// Returns the shell resource string identified by |resource_id|, or an empty
// string on error.
base::string16 LoadShellResourceString(uint32_t resource_id);
// Returns true if the "Unpin from taskbar" verb is available for |shortcut|,
// which means that the shortcut is pinned to the taskbar.
bool ShortcutHasUnpinToTaskbarVerb(const base::FilePath& shortcut);
// Returns true if the target parameter of the |shortcut| evaluates to
// |program_compare|.
bool IsShortcutForProgram(const base::FilePath& shortcut,
const InstallUtil::ProgramCompare& program_compare);
// Returns true if one of the shortcut inside the given |directory| evaluates
// to |program_compare| and is pinned to the taskbar.
bool DirectoryContainsPinnedShortcutForProgram(
const base::FilePath& directory,
const InstallUtil::ProgramCompare& program_compare);
bool error_occured_ = false;
base::win::ScopedCOMInitializer scoped_com_initializer_;
DISALLOW_COPY_AND_ASSIGN(IsPinnedToTaskbarHelper);
};
base::string16 IsPinnedToTaskbarHelper::LoadShellResourceString(
uint32_t resource_id) {
base::ScopedNativeLibrary scoped_native_library(::LoadLibraryEx(
FILE_PATH_LITERAL("shell32.dll"), nullptr,
LOAD_LIBRARY_AS_DATAFILE | LOAD_LIBRARY_AS_IMAGE_RESOURCE));
if (!scoped_native_library.is_valid())
return base::string16();
const wchar_t* resource_ptr = nullptr;
int length = ::LoadStringW(scoped_native_library.get(), resource_id,
reinterpret_cast<wchar_t*>(&resource_ptr), 0);
if (!length || !resource_ptr)
return base::string16();
return base::string16(resource_ptr, length);
}
bool IsPinnedToTaskbarHelper::ShortcutHasUnpinToTaskbarVerb(
const base::FilePath& shortcut) {
// Found inside shell32.dll's resources.
constexpr uint32_t kUnpinFromTaskbarID = 5387;
base::string16 verb_name(LoadShellResourceString(kUnpinFromTaskbarID));
if (verb_name.empty()) {
error_occured_ = true;
return false;
}
base::win::ScopedComPtr<IShellDispatch> shell_dispatch;
HRESULT hresult =
::CoCreateInstance(CLSID_Shell, nullptr, CLSCTX_INPROC_SERVER,
IID_PPV_ARGS(&shell_dispatch));
if (FAILED(hresult) || !shell_dispatch) {
error_occured_ = true;
return false;
}
base::win::ScopedComPtr<Folder> folder;
hresult = shell_dispatch->NameSpace(
base::win::ScopedVariant(shortcut.DirName().value().c_str()),
folder.GetAddressOf());
if (FAILED(hresult) || !folder) {
error_occured_ = true;
return false;
}
base::win::ScopedComPtr<FolderItem> item;
hresult = folder->ParseName(
base::win::ScopedBstr(shortcut.BaseName().value().c_str()),
item.GetAddressOf());
if (FAILED(hresult) || !item) {
error_occured_ = true;
return false;
}
base::win::ScopedComPtr<FolderItemVerbs> verbs;
hresult = item->Verbs(verbs.GetAddressOf());
if (FAILED(hresult) || !verbs) {
error_occured_ = true;
return false;
}
long verb_count = 0;
hresult = verbs->get_Count(&verb_count);
if (FAILED(hresult)) {
error_occured_ = true;
return false;
}
long error_count = 0;
for (long i = 0; i < verb_count; ++i) {
base::win::ScopedComPtr<FolderItemVerb> verb;
hresult =
verbs->Item(base::win::ScopedVariant(i, VT_I4), verb.GetAddressOf());
if (FAILED(hresult) || !verb) {
error_count++;
continue;
}
base::win::ScopedBstr name;
hresult = verb->get_Name(name.Receive());
if (FAILED(hresult)) {
error_count++;
continue;
}
if (base::StringPiece16(name, name.Length()) == verb_name)
return true;
}
if (error_count == verb_count)
error_occured_ = true;
return false;
}
bool IsPinnedToTaskbarHelper::IsShortcutForProgram(
const base::FilePath& shortcut,
const InstallUtil::ProgramCompare& program_compare) {
base::win::ShortcutProperties shortcut_properties;
if (!ResolveShortcutProperties(
shortcut, base::win::ShortcutProperties::PROPERTIES_TARGET,
&shortcut_properties)) {
return false;
}
return program_compare.EvaluatePath(shortcut_properties.target);
}
bool IsPinnedToTaskbarHelper::DirectoryContainsPinnedShortcutForProgram(
const base::FilePath& directory,
const InstallUtil::ProgramCompare& program_compare) {
base::FileEnumerator shortcut_enum(directory, false,
base::FileEnumerator::FILES);
for (base::FilePath shortcut = shortcut_enum.Next(); !shortcut.empty();
shortcut = shortcut_enum.Next()) {
if (IsShortcutForProgram(shortcut, program_compare) &&
ShortcutHasUnpinToTaskbarVerb(shortcut)) {
return true;
}
}
return false;
}
bool IsPinnedToTaskbarHelper::GetResult() {
base::FilePath current_exe;
PathService::Get(base::FILE_EXE, &current_exe);
InstallUtil::ProgramCompare current_exe_compare(current_exe);
// Look into the "Quick Launch\User Pinned\TaskBar" folder.
base::FilePath taskbar_pins_dir;
PathService::Get(base::DIR_TASKBAR_PINS, &taskbar_pins_dir);
if (DirectoryContainsPinnedShortcutForProgram(taskbar_pins_dir,
current_exe_compare)) {
return true;
}
// Check all folders in ImplicitAppShortcuts.
base::FilePath implicit_app_shortcuts_dir;
PathService::Get(base::DIR_IMPLICIT_APP_SHORTCUTS,
&implicit_app_shortcuts_dir);
base::FileEnumerator directory_enum(implicit_app_shortcuts_dir, false,
base::FileEnumerator::DIRECTORIES);
for (base::FilePath directory = directory_enum.Next(); !directory.empty();
directory = directory_enum.Next()) {
if (DirectoryContainsPinnedShortcutForProgram(directory,
current_exe_compare)) {
return true;
}
}
return false;
}
} // namespace
ShellHandlerImpl::ShellHandlerImpl() = default;
ShellHandlerImpl::~ShellHandlerImpl() = default;
// static
void ShellHandlerImpl::Create(
const service_manager::BindSourceInfo& source_info,
chrome::mojom::ShellHandlerRequest request) {
mojo::MakeStrongBinding(base::MakeUnique<ShellHandlerImpl>(),
std::move(request));
}
void ShellHandlerImpl::IsPinnedToTaskbar(
const IsPinnedToTaskbarCallback& callback) {
IsPinnedToTaskbarHelper helper;
bool is_pinned_to_taskbar = helper.GetResult();
callback.Run(!helper.error_occured(), is_pinned_to_taskbar);
}