mirrors/electron
2
0
Fork 0
Code Issues Pull requests Projects Releases Packages 1 Wiki Activity Actions

Add StatusTrayStateChangerWindow from chrome.

Browse source
This commit is contained in:
Cheng Zhao 2014-06-03 11:24:40 +08:00
parent 01e93c108c
commit 08e7c07c57
2 changed files with 369 additions and 0 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

236
chrome/browser/ui/views/status_icons/status_tray_state_changer_win.cc Normal file
View file

@ -0,0 +1,236 @@
// Copyright 2014 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/browser/ui/views/status_icons/status_tray_state_changer_win.h"
namespace {
////////////////////////////////////////////////////////////////////////////////
// Status Tray API
// The folowing describes the interface to the undocumented Windows Exporer APIs
// for manipulating with the status tray area. This code should be used with
// care as it can change with versions (even minor versions) of Windows.
// ITrayNotify is an interface describing the API for manipulating the state of
// the Windows notification area, as well as for registering for change
// notifications.
class __declspec(uuid("FB852B2C-6BAD-4605-9551-F15F87830935")) ITrayNotify
: public IUnknown {
public:
virtual HRESULT STDMETHODCALLTYPE
RegisterCallback(INotificationCB* callback) = 0;
virtual HRESULT STDMETHODCALLTYPE
SetPreference(const NOTIFYITEM* notify_item) = 0;
virtual HRESULT STDMETHODCALLTYPE EnableAutoTray(BOOL enabled) = 0;
};
// ITrayNotifyWin8 is the interface that replaces ITrayNotify for newer versions
// of Windows.
class __declspec(uuid("D133CE13-3537-48BA-93A7-AFCD5D2053B4")) ITrayNotifyWin8
: public IUnknown {
public:
virtual HRESULT STDMETHODCALLTYPE
RegisterCallback(INotificationCB* callback, unsigned long*) = 0;
virtual HRESULT STDMETHODCALLTYPE UnregisterCallback(unsigned long*) = 0;
virtual HRESULT STDMETHODCALLTYPE SetPreference(NOTIFYITEM const*) = 0;
virtual HRESULT STDMETHODCALLTYPE EnableAutoTray(BOOL) = 0;
virtual HRESULT STDMETHODCALLTYPE DoAction(BOOL) = 0;
};
const CLSID CLSID_TrayNotify = {
0x25DEAD04,
0x1EAC,
0x4911,
{0x9E, 0x3A, 0xAD, 0x0A, 0x4A, 0xB5, 0x60, 0xFD}};
} // namespace
StatusTrayStateChangerWin::StatusTrayStateChangerWin(UINT icon_id, HWND window)
: interface_version_(INTERFACE_VERSION_UNKNOWN),
icon_id_(icon_id),
window_(window) {
wchar_t module_name[MAX_PATH];
::GetModuleFileName(NULL, module_name, MAX_PATH);
file_name_ = module_name;
}
void StatusTrayStateChangerWin::EnsureTrayIconVisible() {
DCHECK(CalledOnValidThread());
if (!CreateTrayNotify()) {
VLOG(1) << "Unable to create COM object for ITrayNotify.";
return;
}
scoped_ptr<NOTIFYITEM> notify_item = RegisterCallback();
// If the user has already hidden us explicitly, try to honor their choice by
// not changing anything.
if (notify_item->preference == PREFERENCE_SHOW_NEVER)
return;
// If we are already on the taskbar, return since nothing needs to be done.
if (notify_item->preference == PREFERENCE_SHOW_ALWAYS)
return;
notify_item->preference = PREFERENCE_SHOW_ALWAYS;
SendNotifyItemUpdate(notify_item.Pass());
}
STDMETHODIMP_(ULONG) StatusTrayStateChangerWin::AddRef() {
DCHECK(CalledOnValidThread());
return base::win::IUnknownImpl::AddRef();
}
STDMETHODIMP_(ULONG) StatusTrayStateChangerWin::Release() {
DCHECK(CalledOnValidThread());
return base::win::IUnknownImpl::Release();
}
STDMETHODIMP StatusTrayStateChangerWin::QueryInterface(REFIID riid,
PVOID* ptr_void) {
DCHECK(CalledOnValidThread());
if (riid == __uuidof(INotificationCB)) {
*ptr_void = static_cast<INotificationCB*>(this);
AddRef();
return S_OK;
}
return base::win::IUnknownImpl::QueryInterface(riid, ptr_void);
}
STDMETHODIMP StatusTrayStateChangerWin::Notify(ULONG event,
NOTIFYITEM* notify_item) {
DCHECK(CalledOnValidThread());
DCHECK(notify_item);
if (notify_item->hwnd != window_ || notify_item->id != icon_id_ ||
base::string16(notify_item->exe_name) != file_name_) {
return S_OK;
}
notify_item_.reset(new NOTIFYITEM(*notify_item));
return S_OK;
}
StatusTrayStateChangerWin::~StatusTrayStateChangerWin() {
DCHECK(CalledOnValidThread());
}
bool StatusTrayStateChangerWin::CreateTrayNotify() {
DCHECK(CalledOnValidThread());
tray_notify_.Release(); // Release so this method can be called more than
// once.
HRESULT hr = tray_notify_.CreateInstance(CLSID_TrayNotify);
if (FAILED(hr))
return false;
base::win::ScopedComPtr<ITrayNotifyWin8> tray_notify_win8;
hr = tray_notify_win8.QueryFrom(tray_notify_);
if (SUCCEEDED(hr)) {
interface_version_ = INTERFACE_VERSION_WIN8;
return true;
}
base::win::ScopedComPtr<ITrayNotify> tray_notify_legacy;
hr = tray_notify_legacy.QueryFrom(tray_notify_);
if (SUCCEEDED(hr)) {
interface_version_ = INTERFACE_VERSION_LEGACY;
return true;
}
return false;
}
scoped_ptr<NOTIFYITEM> StatusTrayStateChangerWin::RegisterCallback() {
// |notify_item_| is used to store the result of the callback from
// Explorer.exe, which happens synchronously during
// RegisterCallbackWin8 or RegisterCallbackLegacy.
DCHECK(notify_item_.get() == NULL);
// TODO(dewittj): Add UMA logging here to report if either of our strategies
// has a tendency to fail on particular versions of Windows.
switch (interface_version_) {
case INTERFACE_VERSION_WIN8:
if (!RegisterCallbackWin8())
VLOG(1) << "Unable to successfully run RegisterCallbackWin8.";
break;
case INTERFACE_VERSION_LEGACY:
if (!RegisterCallbackLegacy())
VLOG(1) << "Unable to successfully run RegisterCallbackLegacy.";
break;
default:
NOTREACHED();
}
// Adding an intermediate scoped pointer here so that |notify_item_| is reset
// to NULL.
scoped_ptr<NOTIFYITEM> rv(notify_item_.release());
return rv.Pass();
}
bool StatusTrayStateChangerWin::RegisterCallbackWin8() {
base::win::ScopedComPtr<ITrayNotifyWin8> tray_notify_win8;
HRESULT hr = tray_notify_win8.QueryFrom(tray_notify_);
if (FAILED(hr))
return false;
// The following two lines cause Windows Explorer to call us back with all the
// existing tray icons and their preference. It would also presumably notify
// us if changes were made in realtime while we registered as a callback, but
// we just want to modify our own entry so we immediately unregister.
unsigned long callback_id = 0;
hr = tray_notify_win8->RegisterCallback(this, &callback_id);
tray_notify_win8->UnregisterCallback(&callback_id);
if (FAILED(hr)) {
return false;
}
return true;
}
bool StatusTrayStateChangerWin::RegisterCallbackLegacy() {
base::win::ScopedComPtr<ITrayNotify> tray_notify;
HRESULT hr = tray_notify.QueryFrom(tray_notify_);
if (FAILED(hr)) {
return false;
}
// The following two lines cause Windows Explorer to call us back with all the
// existing tray icons and their preference. It would also presumably notify
// us if changes were made in realtime while we registered as a callback. In
// this version of the API, there can be only one registered callback so it is
// better to unregister as soon as possible.
// TODO(dewittj): Try to notice if the notification area icon customization
// window is open and postpone this call until the user closes it;
// registering the callback while the window is open can cause stale data to
// be displayed to the user.
hr = tray_notify->RegisterCallback(this);
tray_notify->RegisterCallback(NULL);
if (FAILED(hr)) {
return false;
}
return true;
}
void StatusTrayStateChangerWin::SendNotifyItemUpdate(
scoped_ptr<NOTIFYITEM> notify_item) {
if (interface_version_ == INTERFACE_VERSION_LEGACY) {
base::win::ScopedComPtr<ITrayNotify> tray_notify;
HRESULT hr = tray_notify.QueryFrom(tray_notify_);
if (SUCCEEDED(hr))
tray_notify->SetPreference(notify_item.get());
} else if (interface_version_ == INTERFACE_VERSION_WIN8) {
base::win::ScopedComPtr<ITrayNotifyWin8> tray_notify;
HRESULT hr = tray_notify.QueryFrom(tray_notify_);
if (SUCCEEDED(hr))
tray_notify->SetPreference(notify_item.get());
}
}

133
chrome/browser/ui/views/status_icons/status_tray_state_changer_win.h Normal file
View file

@ -0,0 +1,133 @@
// Copyright 2014 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.
#ifndef CHROME_BROWSER_UI_VIEWS_STATUS_ICONS_STATUS_TRAY_STATE_CHANGER_WIN_H_
#define CHROME_BROWSER_UI_VIEWS_STATUS_ICONS_STATUS_TRAY_STATE_CHANGER_WIN_H_
#include "base/memory/scoped_ptr.h"
#include "base/strings/string16.h"
#include "base/threading/non_thread_safe.h"
#include "base/win/iunknown_impl.h"
#include "base/win/scoped_comptr.h"
// The known values for NOTIFYITEM's dwPreference member.
enum NOTIFYITEM_PREFERENCE {
// In Windows UI: "Only show notifications."
PREFERENCE_SHOW_WHEN_ACTIVE = 0,
// In Windows UI: "Hide icon and notifications."
PREFERENCE_SHOW_NEVER = 1,
// In Windows UI: "Show icon and notifications."
PREFERENCE_SHOW_ALWAYS = 2
};
// NOTIFYITEM describes an entry in Explorer's registry of status icons.
// Explorer keeps entries around for a process even after it exits.
struct NOTIFYITEM {
PWSTR exe_name; // The file name of the creating executable.
PWSTR tip; // The last hover-text value associated with this status
// item.
HICON icon; // The icon associated with this status item.
HWND hwnd; // The HWND associated with the status item.
DWORD preference; // Determines the behavior of the icon with respect to
// the taskbar. Values taken from NOTIFYITEM_PREFERENCE.
UINT id; // The ID specified by the application. (hWnd, uID) is
// unique.
GUID guid; // The GUID specified by the application, alternative to
// uID.
};
// INotificationCB is an interface that applications can implement in order to
// receive notifications about the state of the notification area manager.
class __declspec(uuid("D782CCBA-AFB0-43F1-94DB-FDA3779EACCB")) INotificationCB
: public IUnknown {
public:
virtual HRESULT STDMETHODCALLTYPE
Notify(ULONG event, NOTIFYITEM* notify_item) = 0;
};
// A class that is capable of reading and writing the state of the notification
// area in the Windows taskbar. It is used to promote a tray icon from the
// overflow area to the taskbar, and refuses to do anything if the user has
// explicitly marked an icon to be always hidden.
class StatusTrayStateChangerWin : public INotificationCB,
public base::win::IUnknownImpl,
public base::NonThreadSafe {
public:
StatusTrayStateChangerWin(UINT icon_id, HWND window);
// Call this method to move the icon matching |icon_id| and |window| to the
// taskbar from the overflow area. This will not make any changes if the
// icon has been set to |PREFERENCE_SHOW_NEVER|, in order to comply with
// the explicit wishes/configuration of the user.
void EnsureTrayIconVisible();
// IUnknown.
virtual ULONG STDMETHODCALLTYPE AddRef() OVERRIDE;
virtual ULONG STDMETHODCALLTYPE Release() OVERRIDE;
virtual HRESULT STDMETHODCALLTYPE QueryInterface(REFIID, PVOID*) OVERRIDE;
// INotificationCB.
// Notify is called in response to RegisterCallback for each current
// entry in Explorer's list of notification area icons, and ever time
// one of them changes, until UnregisterCallback is called or |this|
// is destroyed.
virtual HRESULT STDMETHODCALLTYPE Notify(ULONG, NOTIFYITEM*);
protected:
virtual ~StatusTrayStateChangerWin();
private:
friend class StatusTrayStateChangerWinTest;
enum InterfaceVersion {
INTERFACE_VERSION_LEGACY = 0,
INTERFACE_VERSION_WIN8,
INTERFACE_VERSION_UNKNOWN
};
// Creates an instance of TrayNotify, and ensures that it supports either
// ITrayNotify or ITrayNotifyWin8. Returns true on success.
bool CreateTrayNotify();
// Returns the NOTIFYITEM that corresponds to this executable and the
// HWND/ID pair that were used to create the StatusTrayStateChangerWin.
// Internally it calls the appropriate RegisterCallback{Win8,Legacy}.
scoped_ptr<NOTIFYITEM> RegisterCallback();
// Calls RegisterCallback with the appropriate interface required by
// different versions of Windows. This will result in |notify_item_| being
// updated when a matching item is passed into
// StatusTrayStateChangerWin::Notify.
bool RegisterCallbackWin8();
bool RegisterCallbackLegacy();
// Sends an update to Explorer with the passed NOTIFYITEM.
void SendNotifyItemUpdate(scoped_ptr<NOTIFYITEM> notify_item);
// Storing IUnknown since we will need to use different interfaces
// for different versions of Windows.
base::win::ScopedComPtr<IUnknown> tray_notify_;
InterfaceVersion interface_version_;
// The ID assigned to the notification area icon that we want to manipulate.
const UINT icon_id_;
// The HWND associated with the notification area icon that we want to
// manipulate. This is an unretained pointer, do not dereference.
const HWND window_;
// Executable name of the current program. Along with |icon_id_| and
// |window_|, this uniquely identifies a notification area entry to Explorer.
base::string16 file_name_;
// Temporary storage for the matched NOTIFYITEM. This is necessary because
// Notify doesn't return anything. The call flow looks like this:
// TrayNotify->RegisterCallback()
// ... other COM stack frames ..
// StatusTrayStateChangerWin->Notify(NOTIFYITEM);
// so we can't just return the notifyitem we're looking for.
scoped_ptr<NOTIFYITEM> notify_item_;
DISALLOW_COPY_AND_ASSIGN(StatusTrayStateChangerWin);
};
#endif // CHROME_BROWSER_UI_VIEWS_STATUS_ICONS_STATUS_TRAY_STATE_CHANGER_WIN_H_