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gecko-dev/xpfe/appshell/nsAppShellService.cpp

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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#include "nsIAppShellService.h"
#include "nsNetUtil.h"
#include "nsIObserverService.h"
#include "nsIObserver.h"
#include "nsIXULRuntime.h"
#include "nsIWindowMediator.h"
#include "nsPIWindowWatcher.h"
#include "nsPIDOMWindow.h"
#include "AppWindow.h"
#include "mozilla/widget/InitData.h"
#include "nsWidgetsCID.h"
#include "nsIWidget.h"
#include "nsAppDirectoryServiceDefs.h"
#include "nsAppShellService.h"
#include "nsContentUtils.h"
#include "nsDirectoryServiceUtils.h"
#include "nsThreadUtils.h"
#include "nsILoadContext.h"
#include "nsIWebNavigation.h"
#include "nsIWindowlessBrowser.h"
#include "mozilla/Attributes.h"
#include "mozilla/Preferences.h"
#include "mozilla/Services.h"
#include "mozilla/StartupTimeline.h"
#include "mozilla/StaticPrefs_browser.h"
#include "mozilla/Try.h"
#include "mozilla/intl/LocaleService.h"
#include "mozilla/dom/BrowsingContext.h"
#include "mozilla/dom/Document.h"
#include "nsEmbedCID.h"
#include "nsIWebBrowser.h"
#include "nsIDocShell.h"
#include "gfxPlatform.h"
#include "nsWebBrowser.h"
#include "nsDocShell.h"
#include "nsDocShellLoadState.h"
#ifdef MOZ_INSTRUMENT_EVENT_LOOP
# include "EventTracer.h"
#endif
using namespace mozilla;
using mozilla::dom::BrowsingContext;
using mozilla::intl::LocaleService;
// Default URL for the hidden window, can be overridden by a pref on Mac
#define DEFAULT_HIDDENWINDOW_URL "resource://gre-resources/hiddenWindow.html"
class nsIAppShell;
nsAppShellService::nsAppShellService()
: mXPCOMWillShutDown(false),
mXPCOMShuttingDown(false),
mModalWindowCount(0),
mApplicationProvidedHiddenWindow(false),
mScreenId(0) {
nsCOMPtr<nsIObserverService> obs = services::GetObserverService();
if (obs) {
obs->AddObserver(this, "xpcom-will-shutdown", false);
obs->AddObserver(this, "xpcom-shutdown", false);
}
}
nsAppShellService::~nsAppShellService() {}
/*
* Implement the nsISupports methods...
*/
NS_IMPL_ISUPPORTS(nsAppShellService, nsIAppShellService, nsIObserver)
NS_IMETHODIMP
nsAppShellService::SetScreenId(uint32_t aScreenId) {
mScreenId = aScreenId;
return NS_OK;
}
void nsAppShellService::EnsureHiddenWindow() {
if (!mHiddenWindow) {
(void)CreateHiddenWindow();
}
}
NS_IMETHODIMP
nsAppShellService::CreateHiddenWindow() {
if (!XRE_IsParentProcess()) {
return NS_ERROR_NOT_IMPLEMENTED;
}
if (mXPCOMShuttingDown) {
return NS_ERROR_FAILURE;
}
if (mHiddenWindow) {
return NS_OK;
}
nsCOMPtr<nsIFile> profileDir;
NS_GetSpecialDirectory(NS_APP_USER_PROFILE_50_DIR,
getter_AddRefs(profileDir));
if (!profileDir) {
// This is too early on startup to create the hidden window
return NS_ERROR_FAILURE;
}
nsresult rv;
int32_t initialHeight = 100, initialWidth = 100;
#ifdef XP_MACOSX
uint32_t chromeMask = 0;
nsAutoCString prefVal;
rv = Preferences::GetCString("browser.hiddenWindowChromeURL", prefVal);
const char* hiddenWindowURL =
NS_SUCCEEDED(rv) ? prefVal.get() : DEFAULT_HIDDENWINDOW_URL;
mApplicationProvidedHiddenWindow = prefVal.get() ? true : false;
#else
static const char hiddenWindowURL[] = DEFAULT_HIDDENWINDOW_URL;
uint32_t chromeMask = nsIWebBrowserChrome::CHROME_ALL;
#endif
nsCOMPtr<nsIURI> url;
rv = NS_NewURI(getter_AddRefs(url), hiddenWindowURL);
NS_ENSURE_SUCCESS(rv, rv);
RefPtr<AppWindow> newWindow;
rv = JustCreateTopWindow(nullptr, url, chromeMask, initialWidth,
initialHeight, true, getter_AddRefs(newWindow));
NS_ENSURE_SUCCESS(rv, rv);
nsCOMPtr<nsIDocShell> docShell;
newWindow->GetDocShell(getter_AddRefs(docShell));
if (docShell) {
Unused << docShell->GetBrowsingContext()->SetExplicitActive(
dom::ExplicitActiveStatus::Inactive);
}
mHiddenWindow.swap(newWindow);
return NS_OK;
}
NS_IMETHODIMP
nsAppShellService::DestroyHiddenWindow() {
if (mHiddenWindow) {
mHiddenWindow->Destroy();
mHiddenWindow = nullptr;
}
return NS_OK;
}
/*
* Create a new top level window and display the given URL within it...
*/
NS_IMETHODIMP
nsAppShellService::CreateTopLevelWindow(nsIAppWindow* aParent, nsIURI* aUrl,
uint32_t aChromeMask,
int32_t aInitialWidth,
int32_t aInitialHeight,
nsIAppWindow** aResult) {
nsresult rv;
StartupTimeline::RecordOnce(StartupTimeline::CREATE_TOP_LEVEL_WINDOW);
RefPtr<AppWindow> newWindow;
rv = JustCreateTopWindow(aParent, aUrl, aChromeMask, aInitialWidth,
aInitialHeight, false, getter_AddRefs(newWindow));
newWindow.forget(aResult);
if (NS_SUCCEEDED(rv)) {
// the addref resulting from this is the owning addref for this window
RegisterTopLevelWindow(*aResult);
}
return rv;
}
/*
* This class provides a stub implementation of nsIWebBrowserChrome, as needed
* by nsAppShellService::CreateWindowlessBrowser
*/
class WebBrowserChrome2Stub final : public nsIWebBrowserChrome,
public nsIInterfaceRequestor,
public nsSupportsWeakReference {
protected:
nsCOMPtr<nsIWebBrowser> mBrowser;
virtual ~WebBrowserChrome2Stub() = default;
public:
void SetBrowser(nsIWebBrowser* aBrowser) { mBrowser = aBrowser; }
NS_DECL_ISUPPORTS
NS_DECL_NSIWEBBROWSERCHROME
NS_DECL_NSIINTERFACEREQUESTOR
};
NS_INTERFACE_MAP_BEGIN(WebBrowserChrome2Stub)
NS_INTERFACE_MAP_ENTRY_AMBIGUOUS(nsISupports, nsIWebBrowserChrome)
NS_INTERFACE_MAP_ENTRY(nsIWebBrowserChrome)
NS_INTERFACE_MAP_ENTRY(nsIInterfaceRequestor)
NS_INTERFACE_MAP_ENTRY(nsISupportsWeakReference)
NS_INTERFACE_MAP_END
NS_IMPL_ADDREF(WebBrowserChrome2Stub)
NS_IMPL_RELEASE(WebBrowserChrome2Stub)
NS_IMETHODIMP
WebBrowserChrome2Stub::GetChromeFlags(uint32_t* aChromeFlags) {
*aChromeFlags = 0;
return NS_OK;
}
NS_IMETHODIMP
WebBrowserChrome2Stub::SetChromeFlags(uint32_t aChromeFlags) {
MOZ_ASSERT_UNREACHABLE(
"WebBrowserChrome2Stub::SetChromeFlags is "
"not supported");
return NS_ERROR_NOT_IMPLEMENTED;
}
NS_IMETHODIMP
WebBrowserChrome2Stub::ShowAsModal() {
MOZ_ASSERT_UNREACHABLE("WebBrowserChrome2Stub::ShowAsModal is not supported");
return NS_ERROR_NOT_IMPLEMENTED;
}
NS_IMETHODIMP
WebBrowserChrome2Stub::IsWindowModal(bool* aResult) {
*aResult = false;
return NS_OK;
}
NS_IMETHODIMP
WebBrowserChrome2Stub::SetLinkStatus(const nsAString& aStatusText) {
return NS_OK;
}
NS_IMETHODIMP
WebBrowserChrome2Stub::GetInterface(const nsIID& aIID, void** aSink) {
return QueryInterface(aIID, aSink);
}
NS_IMETHODIMP
WebBrowserChrome2Stub::GetDimensions(DimensionKind aDimensionKind, int32_t* aX,
int32_t* aY, int32_t* aCX, int32_t* aCY) {
if (aX) {
*aX = 0;
}
if (aY) {
*aY = 0;
}
if (aCX) {
*aCX = 0;
}
if (aCY) {
*aCY = 0;
}
return NS_OK;
}
NS_IMETHODIMP
WebBrowserChrome2Stub::SetDimensions(DimensionRequest&& aRequest) {
nsCOMPtr<nsIBaseWindow> window(do_QueryInterface(mBrowser));
NS_ENSURE_STATE(window);
// Inner and outer dimensions are equal.
aRequest.mDimensionKind = DimensionKind::Outer;
MOZ_TRY(aRequest.SupplementFrom(window));
return aRequest.ApplyOuterTo(window);
}
NS_IMETHODIMP
WebBrowserChrome2Stub::Blur() { return NS_ERROR_NOT_IMPLEMENTED; }
class BrowserDestroyer final : public Runnable {
public:
BrowserDestroyer(nsIWebBrowser* aBrowser, nsISupports* aContainer)
: mozilla::Runnable("BrowserDestroyer"),
mBrowser(aBrowser),
mContainer(aContainer) {}
static nsresult Destroy(nsIWebBrowser* aBrowser) {
nsCOMPtr<nsIBaseWindow> window(do_QueryInterface(aBrowser));
return window->Destroy();
}
NS_IMETHOD
Run() override {
// Explicitly destroy the browser, in case this isn't the last reference.
return Destroy(mBrowser);
}
protected:
virtual ~BrowserDestroyer() {}
private:
nsCOMPtr<nsIWebBrowser> mBrowser;
nsCOMPtr<nsISupports> mContainer;
};
// This is the "stub" we return from CreateWindowlessBrowser - it exists
// to manage the lifetimes of the nsIWebBrowser and container window.
// In particular, it keeps a strong reference to both, to prevent them from
// being collected while this object remains alive, and ensures that they
// aren't destroyed when it's not safe to run scripts.
class WindowlessBrowser final : public nsIWindowlessBrowser,
public nsIInterfaceRequestor {
public:
WindowlessBrowser(nsIWebBrowser* aBrowser, nsISupports* aContainer)
: mBrowser(aBrowser), mContainer(aContainer), mClosed(false) {
mWebNavigation = do_QueryInterface(aBrowser);
mInterfaceRequestor = do_QueryInterface(aBrowser);
}
NS_DECL_ISUPPORTS
NS_DECL_NSIWINDOWLESSBROWSER
NS_FORWARD_SAFE_NSIWEBNAVIGATION(mWebNavigation)
NS_FORWARD_SAFE_NSIINTERFACEREQUESTOR(mInterfaceRequestor)
private:
~WindowlessBrowser() {
if (mClosed) {
return;
}
NS_WARNING("Windowless browser was not closed prior to destruction");
// The docshell destructor needs to dispatch events, and can only run
// when it's safe to run scripts. If this was triggered by GC, it may
// not always be safe to run scripts, in which cases we need to delay
// destruction until it is.
auto runnable = MakeRefPtr<BrowserDestroyer>(mBrowser, mContainer);
nsContentUtils::AddScriptRunner(runnable.forget());
}
nsCOMPtr<nsIWebBrowser> mBrowser;
nsCOMPtr<nsIWebNavigation> mWebNavigation;
nsCOMPtr<nsIInterfaceRequestor> mInterfaceRequestor;
// we don't use the container but just hold a reference to it.
nsCOMPtr<nsISupports> mContainer;
bool mClosed;
};
NS_IMPL_ISUPPORTS(WindowlessBrowser, nsIWindowlessBrowser, nsIWebNavigation,
nsIInterfaceRequestor)
NS_IMETHODIMP
WindowlessBrowser::Close() {
NS_ENSURE_TRUE(!mClosed, NS_ERROR_UNEXPECTED);
NS_ASSERTION(nsContentUtils::IsSafeToRunScript(),
"WindowlessBrowser::Close called when not safe to run scripts");
mClosed = true;
mWebNavigation = nullptr;
mInterfaceRequestor = nullptr;
return BrowserDestroyer::Destroy(mBrowser);
}
NS_IMETHODIMP
WindowlessBrowser::GetBrowsingContext(BrowsingContext** aBrowsingContext) {
nsCOMPtr<nsIDocShellTreeItem> docShellTreeItem = do_QueryInterface(mBrowser);
if (!docShellTreeItem) {
return NS_ERROR_NOT_INITIALIZED;
}
return docShellTreeItem->GetBrowsingContextXPCOM(aBrowsingContext);
}
NS_IMETHODIMP
WindowlessBrowser::GetDocShell(nsIDocShell** aDocShell) {
nsCOMPtr<nsIDocShell> docShell = do_GetInterface(mInterfaceRequestor);
if (!docShell) {
return NS_ERROR_NOT_INITIALIZED;
}
docShell.forget(aDocShell);
return NS_OK;
}
NS_IMETHODIMP
nsAppShellService::CreateWindowlessBrowser(bool aIsChrome, uint32_t aChromeMask,
nsIWindowlessBrowser** aResult) {
if (aChromeMask) {
MOZ_DIAGNOSTIC_ASSERT(aIsChrome, "Got chrome flags for non-chrome browser");
if (aChromeMask & ~(nsIWebBrowserChrome::CHROME_REMOTE_WINDOW |
nsIWebBrowserChrome::CHROME_FISSION_WINDOW |
nsIWebBrowserChrome::CHROME_PRIVATE_WINDOW)) {
NS_ERROR("Received unexpected chrome flags");
return NS_ERROR_FAILURE;
}
}
/* First, we set the container window for our instance of nsWebBrowser. Since
* we don't actually have a window, we instead set the container window to be
* an instance of WebBrowserChrome2Stub, which provides a stub implementation
* of nsIWebBrowserChrome.
*/
RefPtr<WebBrowserChrome2Stub> stub = new WebBrowserChrome2Stub();
/* A windowless web browser doesn't have an associated OS level window. To
* accomplish this, we initialize the window associated with our instance of
* nsWebBrowser with an instance of HeadlessWidget/PuppetWidget, which provide
* a stub implementation of nsIWidget.
*/
nsCOMPtr<nsIWidget> widget;
if (gfxPlatform::IsHeadless()) {
widget = nsIWidget::CreateHeadlessWidget();
} else {
widget = nsIWidget::CreatePuppetWidget(nullptr);
}
if (!widget) {
NS_ERROR("Couldn't create instance of stub widget");
return NS_ERROR_FAILURE;
}
nsresult rv =
widget->Create(nullptr, 0, LayoutDeviceIntRect(0, 0, 0, 0), nullptr);
NS_ENSURE_SUCCESS(rv, rv);
// Create a BrowsingContext for our windowless browser.
RefPtr<BrowsingContext> browsingContext = BrowsingContext::CreateIndependent(
aIsChrome ? BrowsingContext::Type::Chrome
: BrowsingContext::Type::Content);
if (aChromeMask & nsIWebBrowserChrome::CHROME_REMOTE_WINDOW) {
browsingContext->SetRemoteTabs(true);
}
if (aChromeMask & nsIWebBrowserChrome::CHROME_FISSION_WINDOW) {
browsingContext->SetRemoteSubframes(true);
}
if (aChromeMask & nsIWebBrowserChrome::CHROME_PRIVATE_WINDOW) {
browsingContext->SetPrivateBrowsing(true);
}
/* Next, we create an instance of nsWebBrowser. Instances of this class have
* an associated doc shell, which is what we're interested in.
*/
nsCOMPtr<nsIWebBrowser> browser = nsWebBrowser::Create(
stub, widget, browsingContext, nullptr /* initialWindowChild */);
if (NS_WARN_IF(!browser)) {
NS_ERROR("Couldn't create instance of nsWebBrowser!");
return NS_ERROR_FAILURE;
}
// Make sure the container window owns the the nsWebBrowser instance.
stub->SetBrowser(browser);
nsISupports* isstub = NS_ISUPPORTS_CAST(nsIWebBrowserChrome*, stub);
RefPtr<nsIWindowlessBrowser> result = new WindowlessBrowser(browser, isstub);
nsCOMPtr<nsIDocShell> docshell = do_GetInterface(result);
docshell->SetInvisible(true);
result.forget(aResult);
return NS_OK;
}
/*
* Just do the window-making part of CreateTopLevelWindow
*/
nsresult nsAppShellService::JustCreateTopWindow(
nsIAppWindow* aParent, nsIURI* aUrl, uint32_t aChromeMask,
int32_t aInitialWidth, int32_t aInitialHeight, bool aIsHiddenWindow,
AppWindow** aResult) {
using BorderStyle = widget::BorderStyle;
*aResult = nullptr;
NS_ENSURE_STATE(!mXPCOMWillShutDown);
nsCOMPtr<nsIAppWindow> parent;
if (aChromeMask & nsIWebBrowserChrome::CHROME_DEPENDENT) parent = aParent;
RefPtr<AppWindow> window = new AppWindow(aChromeMask);
#ifdef XP_WIN
// If the parent is currently fullscreen, tell the child to ignore persisted
// full screen states. This way new browser windows open on top of fullscreen
// windows normally.
if (nsCOMPtr<nsIBaseWindow> baseWin = do_QueryInterface(aParent)) {
nsCOMPtr<nsIWidget> widget;
baseWin->GetMainWidget(getter_AddRefs(widget));
if (widget && widget->SizeMode() == nsSizeMode_Fullscreen) {
window->IgnoreXULSizeMode(true);
}
}
#endif
widget::InitData widgetInitData;
if (aIsHiddenWindow) {
widgetInitData.mWindowType = widget::WindowType::Invisible;
} else {
widgetInitData.mWindowType =
aChromeMask & nsIWebBrowserChrome::CHROME_OPENAS_DIALOG
? widget::WindowType::Dialog
: widget::WindowType::TopLevel;
}
if (aChromeMask & nsIWebBrowserChrome::CHROME_SUPPRESS_ANIMATION) {
widgetInitData.mIsAnimationSuppressed = true;
}
if (aChromeMask & nsIWebBrowserChrome::CHROME_ALWAYS_ON_TOP) {
widgetInitData.mAlwaysOnTop = true;
}
if (aChromeMask & nsIWebBrowserChrome::CHROME_REMOTE_WINDOW) {
widgetInitData.mHasRemoteContent = true;
}
#if defined(MOZ_WIDGET_GTK) || defined(XP_WIN)
// Windows/Gtk PIP window support. It's Chrome dialog window, always on top
// and without any bar.
uint32_t pipMask = nsIWebBrowserChrome::CHROME_ALWAYS_ON_TOP |
nsIWebBrowserChrome::CHROME_OPENAS_CHROME |
nsIWebBrowserChrome::CHROME_WINDOW_RESIZE;
uint32_t barMask = nsIWebBrowserChrome::CHROME_MENUBAR |
nsIWebBrowserChrome::CHROME_TOOLBAR |
nsIWebBrowserChrome::CHROME_LOCATIONBAR |
nsIWebBrowserChrome::CHROME_TITLEBAR |
nsIWebBrowserChrome::CHROME_STATUSBAR;
if (widgetInitData.mWindowType == widget::WindowType::Dialog &&
((aChromeMask & pipMask) == pipMask) && !(aChromeMask & barMask)) {
widgetInitData.mPIPWindow = true;
}
#endif
// alert=yes is expected to be used along with dialogs, not other window
// types.
MOZ_ASSERT_IF(aChromeMask & nsIWebBrowserChrome::CHROME_ALERT,
widgetInitData.mWindowType == widget::WindowType::Dialog);
widgetInitData.mIsAlert =
!!(aChromeMask & nsIWebBrowserChrome::CHROME_ALERT) &&
widgetInitData.mWindowType == widget::WindowType::Dialog;
#if defined(XP_WIN)
if (widgetInitData.mWindowType == widget::WindowType::TopLevel ||
widgetInitData.mWindowType == widget::WindowType::Dialog) {
widgetInitData.mClipChildren = true;
}
#endif
// note default chrome overrides other OS chrome settings, but
// not internal chrome
if (aChromeMask & nsIWebBrowserChrome::CHROME_DEFAULT) {
widgetInitData.mBorderStyle = BorderStyle::Default;
} else if ((aChromeMask & nsIWebBrowserChrome::CHROME_ALL) ==
nsIWebBrowserChrome::CHROME_ALL) {
widgetInitData.mBorderStyle = BorderStyle::All;
} else {
widgetInitData.mBorderStyle = BorderStyle::None; // assumes none == 0x00
if (aChromeMask & nsIWebBrowserChrome::CHROME_WINDOW_BORDERS) {
widgetInitData.mBorderStyle |= BorderStyle::Border;
}
if (aChromeMask & nsIWebBrowserChrome::CHROME_TITLEBAR) {
widgetInitData.mBorderStyle |= BorderStyle::Title;
}
if (aChromeMask & nsIWebBrowserChrome::CHROME_WINDOW_CLOSE) {
widgetInitData.mBorderStyle |= BorderStyle::Close;
}
if (aChromeMask & nsIWebBrowserChrome::CHROME_WINDOW_RESIZE) {
widgetInitData.mResizable = true;
widgetInitData.mBorderStyle |= BorderStyle::ResizeH;
// only resizable windows get the maximize button (but not dialogs)
if (!(aChromeMask & nsIWebBrowserChrome::CHROME_OPENAS_DIALOG)) {
widgetInitData.mBorderStyle |= BorderStyle::Maximize;
}
}
// all windows (except dialogs) get minimize buttons and the system menu
if (!(aChromeMask & nsIWebBrowserChrome::CHROME_OPENAS_DIALOG)) {
widgetInitData.mBorderStyle |= BorderStyle::Minimize | BorderStyle::Menu;
}
// but anyone can explicitly ask for a minimize button
if (aChromeMask & nsIWebBrowserChrome::CHROME_WINDOW_MINIMIZE) {
widgetInitData.mBorderStyle |= BorderStyle::Minimize;
}
}
if (aInitialWidth == nsIAppShellService::SIZE_TO_CONTENT ||
aInitialHeight == nsIAppShellService::SIZE_TO_CONTENT) {
aInitialWidth = 1;
aInitialHeight = 1;
window->SetIntrinsicallySized(true);
}
bool center = aChromeMask & nsIWebBrowserChrome::CHROME_CENTER_SCREEN;
widgetInitData.mRTL = LocaleService::GetInstance()->IsAppLocaleRTL();
// Enforce the Private Browsing autoStart pref first.
bool isPrivateBrowsingWindow =
StaticPrefs::browser_privatebrowsing_autostart();
if (aChromeMask & nsIWebBrowserChrome::CHROME_PRIVATE_WINDOW) {
// Caller requested a private window
isPrivateBrowsingWindow = true;
}
widgetInitData.mIsPrivate = isPrivateBrowsingWindow;
nsresult rv =
window->Initialize(parent, center ? aParent : nullptr, aInitialWidth,
aInitialHeight, aIsHiddenWindow, widgetInitData);
NS_ENSURE_SUCCESS(rv, rv);
nsCOMPtr<mozIDOMWindowProxy> domWin = do_GetInterface(aParent);
nsCOMPtr<nsIWebNavigation> webNav = do_GetInterface(domWin);
nsCOMPtr<nsILoadContext> parentContext = do_QueryInterface(webNav);
if (!isPrivateBrowsingWindow && parentContext) {
// Ensure that we propagate any existing private browsing status
// from the parent, even if it will not actually be used
// as a parent value.
isPrivateBrowsingWindow = parentContext->UsePrivateBrowsing();
}
if (RefPtr<nsDocShell> docShell = window->GetDocShell()) {
MOZ_ASSERT(docShell->GetBrowsingContext()->IsChrome());
docShell->SetPrivateBrowsing(isPrivateBrowsingWindow);
docShell->SetRemoteTabs(aChromeMask &
nsIWebBrowserChrome::CHROME_REMOTE_WINDOW);
docShell->SetRemoteSubframes(aChromeMask &
nsIWebBrowserChrome::CHROME_FISSION_WINDOW);
// Eagerly create an about:blank content viewer with the right principal
// here, rather than letting it happen in the upcoming call to
// SetInitialPrincipal. This avoids creating the about:blank document and
// then blowing it away with a second one, which can cause problems for the
// top-level chrome window case. See bug 789773.
// Toplevel chrome windows always have a system principal, so ensure the
// initial window is created with that principal.
// We need to do this even when creating a chrome window to load a content
// window, see bug 799348 comment 13 for details about what previously
// happened here due to it using the subject principal.
if (nsContentUtils::IsInitialized()) { // Sometimes this happens really
// early. See bug 793370.
MOZ_DIAGNOSTIC_ASSERT(
nsContentUtils::LegacyIsCallerChromeOrNativeCode(),
"Previously, this method would use the subject principal rather than "
"hardcoding the system principal");
// Use the system principal as the storage principal too until the new
// window finishes navigating and gets a real storage principal.
rv = docShell->CreateAboutBlankDocumentViewer(
nsContentUtils::GetSystemPrincipal(),
nsContentUtils::GetSystemPrincipal(),
/* aCsp = */ nullptr, /* aBaseURI = */ nullptr,
/* aIsInitialDocument = */ true);
NS_ENSURE_SUCCESS(rv, rv);
RefPtr<dom::Document> doc = docShell->GetDocument();
NS_ENSURE_TRUE(!!doc, NS_ERROR_FAILURE);
MOZ_ASSERT(doc->IsInitialDocument(),
"Document should be an initial document");
}
// Begin loading the URL provided.
if (aUrl) {
RefPtr<nsDocShellLoadState> loadState = new nsDocShellLoadState(aUrl);
loadState->SetTriggeringPrincipal(nsContentUtils::GetSystemPrincipal());
loadState->SetFirstParty(true);
rv = docShell->LoadURI(loadState, /* aSetNavigating */ true);
NS_ENSURE_SUCCESS(rv, rv);
}
}
window.forget(aResult);
if (center) rv = (*aResult)->Center(parent, parent ? false : true, false);
return rv;
}
NS_IMETHODIMP
nsAppShellService::GetHiddenWindow(nsIAppWindow** aWindow) {
NS_ENSURE_ARG_POINTER(aWindow);
EnsureHiddenWindow();
*aWindow = mHiddenWindow;
NS_IF_ADDREF(*aWindow);
return *aWindow ? NS_OK : NS_ERROR_FAILURE;
}
NS_IMETHODIMP
nsAppShellService::GetHiddenDOMWindow(mozIDOMWindowProxy** aWindow) {
NS_ENSURE_ARG_POINTER(aWindow);
EnsureHiddenWindow();
nsresult rv;
nsCOMPtr<nsIDocShell> docShell;
NS_ENSURE_TRUE(mHiddenWindow, NS_ERROR_FAILURE);
rv = mHiddenWindow->GetDocShell(getter_AddRefs(docShell));
NS_ENSURE_SUCCESS(rv, rv);
NS_ENSURE_TRUE(docShell, NS_ERROR_FAILURE);
nsCOMPtr<nsPIDOMWindowOuter> hiddenDOMWindow(docShell->GetWindow());
hiddenDOMWindow.forget(aWindow);
return *aWindow ? NS_OK : NS_ERROR_FAILURE;
}
NS_IMETHODIMP
nsAppShellService::GetHasHiddenWindow(bool* aHasHiddenWindow) {
NS_ENSURE_ARG_POINTER(aHasHiddenWindow);
*aHasHiddenWindow = !!mHiddenWindow;
return NS_OK;
}
NS_IMETHODIMP
nsAppShellService::GetApplicationProvidedHiddenWindow(bool* aAPHW) {
*aAPHW = mApplicationProvidedHiddenWindow;
return NS_OK;
}
/*
* Register a new top level window (created elsewhere)
*/
NS_IMETHODIMP
nsAppShellService::RegisterTopLevelWindow(nsIAppWindow* aWindow) {
NS_ENSURE_ARG_POINTER(aWindow);
nsCOMPtr<nsIDocShell> docShell;
aWindow->GetDocShell(getter_AddRefs(docShell));
NS_ENSURE_TRUE(docShell, NS_ERROR_FAILURE);
nsCOMPtr<nsPIDOMWindowOuter> domWindow(docShell->GetWindow());
NS_ENSURE_TRUE(domWindow, NS_ERROR_FAILURE);
// Toplevel chrome windows always have a system principal, so ensure the
// initial window is created with that principal.
// We need to do this even when creating a chrome window to load a content
// window, see bug 799348 comment 13 for details about what previously
// happened here due to it using the subject principal.
MOZ_DIAGNOSTIC_ASSERT(
nsContentUtils::LegacyIsCallerChromeOrNativeCode(),
"Previously, this method would use the subject principal rather than "
"hardcoding the system principal");
domWindow->SetInitialPrincipal(nsContentUtils::GetSystemPrincipal(), nullptr,
Nothing());
// tell the window mediator about the new window
nsCOMPtr<nsIWindowMediator> mediator(
do_GetService(NS_WINDOWMEDIATOR_CONTRACTID));
NS_ASSERTION(mediator, "Couldn't get window mediator.");
if (mediator) mediator->RegisterWindow(aWindow);
// tell the window watcher about the new window
nsCOMPtr<nsPIWindowWatcher> wwatcher(
do_GetService(NS_WINDOWWATCHER_CONTRACTID));
NS_ASSERTION(wwatcher, "No windowwatcher?");
if (wwatcher && domWindow) {
wwatcher->AddWindow(domWindow, 0);
}
// an ongoing attempt to quit is stopped by a newly opened window
nsCOMPtr<nsIObserverService> obssvc = services::GetObserverService();
NS_ASSERTION(obssvc, "Couldn't get observer service.");
if (obssvc) {
obssvc->NotifyObservers(aWindow, "xul-window-registered", nullptr);
AppWindow* appWindow = static_cast<AppWindow*>(aWindow);
appWindow->WasRegistered();
}
return NS_OK;
}
NS_IMETHODIMP
nsAppShellService::UnregisterTopLevelWindow(nsIAppWindow* aWindow) {
if (mXPCOMShuttingDown) {
/* return an error code in order to:
- avoid doing anything with other member variables while we are in
the destructor
- notify the caller not to release the AppShellService after
unregistering the window
(we don't want to be deleted twice consecutively to
mHiddenWindow->Destroy() in our destructor)
*/
return NS_ERROR_FAILURE;
}
NS_ENSURE_ARG_POINTER(aWindow);
if (aWindow == mHiddenWindow) {
// CreateHiddenWindow() does not register the window, so we're done.
return NS_OK;
}
// tell the window mediator
nsCOMPtr<nsIWindowMediator> mediator(
do_GetService(NS_WINDOWMEDIATOR_CONTRACTID));
NS_ASSERTION(mediator, "Couldn't get window mediator. Doing xpcom shutdown?");
if (mediator) mediator->UnregisterWindow(aWindow);
// tell the window watcher
nsCOMPtr<nsPIWindowWatcher> wwatcher(
do_GetService(NS_WINDOWWATCHER_CONTRACTID));
NS_ASSERTION(wwatcher, "Couldn't get windowwatcher, doing xpcom shutdown?");
if (wwatcher) {
nsCOMPtr<nsIDocShell> docShell;
aWindow->GetDocShell(getter_AddRefs(docShell));
if (docShell) {
nsCOMPtr<nsPIDOMWindowOuter> domWindow(docShell->GetWindow());
if (domWindow) wwatcher->RemoveWindow(domWindow);
}
}
return NS_OK;
}
NS_IMETHODIMP
nsAppShellService::Observe(nsISupports* aSubject, const char* aTopic,
const char16_t* aData) {
if (!strcmp(aTopic, "xpcom-will-shutdown")) {
mXPCOMWillShutDown = true;
} else if (!strcmp(aTopic, "xpcom-shutdown")) {
mXPCOMShuttingDown = true;
if (mHiddenWindow) {
mHiddenWindow->Destroy();
}
} else {
NS_ERROR("Unexpected observer topic!");
}
return NS_OK;
}
NS_IMETHODIMP
nsAppShellService::StartEventLoopLagTracking(bool* aResult) {
#ifdef MOZ_INSTRUMENT_EVENT_LOOP
*aResult = mozilla::InitEventTracing(true);
#endif
return NS_OK;
}
NS_IMETHODIMP
nsAppShellService::StopEventLoopLagTracking() {
#ifdef MOZ_INSTRUMENT_EVENT_LOOP
mozilla::ShutdownEventTracing();
#endif
return NS_OK;
}
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