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RetroZilla/toolkit/xre/nsNativeAppSupportWin.cpp

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/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/* ***** BEGIN LICENSE BLOCK *****
* Version: MPL 1.1/GPL 2.0/LGPL 2.1
*
* The contents of this file are subject to the Mozilla Public License Version
* 1.1 (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
* http://www.mozilla.org/MPL/
*
* Software distributed under the License is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
* for the specific language governing rights and limitations under the
* License.
*
* The Original Code is Mozilla Communicator client code.
*
* The Initial Developer of the Original Code is
* Netscape Communications Corporation.
* Portions created by the Initial Developer are Copyright (C) 1998
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
* Bill Law law@netscape.com
* Robert Strong robert.bugzilla@gmail.com
*
* Alternatively, the contents of this file may be used under the terms of
* either the GNU General Public License Version 2 or later (the "GPL"), or
* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
* in which case the provisions of the GPL or the LGPL are applicable instead
* of those above. If you wish to allow use of your version of this file only
* under the terms of either the GPL or the LGPL, and not to allow others to
* use your version of this file under the terms of the MPL, indicate your
* decision by deleting the provisions above and replace them with the notice
* and other provisions required by the GPL or the LGPL. If you do not delete
* the provisions above, a recipient may use your version of this file under
* the terms of any one of the MPL, the GPL or the LGPL.
*
* ***** END LICENSE BLOCK ***** */
#include "nsNativeAppSupportBase.h"
#include "nsNativeAppSupportWin.h"
#include "nsAppRunner.h"
#include "nsXULAppAPI.h"
#include "nsString.h"
#include "nsIBrowserDOMWindow.h"
#include "nsICommandLineRunner.h"
#include "nsCOMPtr.h"
#include "nsXPIDLString.h"
#include "nsIComponentManager.h"
#include "nsIServiceManager.h"
#include "nsIDOMWindow.h"
#include "nsIDOMChromeWindow.h"
#include "nsXPCOM.h"
#include "nsISupportsPrimitives.h"
#include "nsISupportsArray.h"
#include "nsIWindowWatcher.h"
#include "nsIDOMWindowInternal.h"
#include "nsIScriptGlobalObject.h"
#include "nsIDocShell.h"
#include "nsIDocShellTreeItem.h"
#include "nsIBaseWindow.h"
#include "nsIWidget.h"
#include "nsIAppShellService.h"
#include "nsIProfileInternal.h"
#include "nsIXULWindow.h"
#include "nsIInterfaceRequestor.h"
#include "nsIInterfaceRequestorUtils.h"
#include "nsIPromptService.h"
#include "nsNetCID.h"
#include "nsNetUtil.h"
#include "nsIObserver.h"
#include "nsIObserverService.h"
#ifdef MOZ_PHOENIX
#include "nsIShellService.h"
#endif
#include "nsIDOMLocation.h"
#include "nsIJSContextStack.h"
#include "nsIWebNavigation.h"
#include "nsIWindowMediator.h"
#include "nsNativeCharsetUtils.h"
#include <windows.h>
#include <shellapi.h>
#include <ddeml.h>
#include <stdlib.h>
#include <stdio.h>
#include <io.h>
#include <direct.h>
#include <fcntl.h>
static HWND hwndForDOMWindow( nsISupports * );
static
nsresult
GetMostRecentWindow(const PRUnichar* aType, nsIDOMWindowInternal** aWindow) {
nsresult rv;
nsCOMPtr<nsIWindowMediator> med( do_GetService( NS_WINDOWMEDIATOR_CONTRACTID, &rv ) );
if ( NS_FAILED( rv ) )
return rv;
if ( med )
return med->GetMostRecentWindow( aType, aWindow );
return NS_ERROR_FAILURE;
}
static
void
activateWindow( nsIDOMWindowInternal *win ) {
// Try to get native window handle.
HWND hwnd = hwndForDOMWindow( win );
if ( hwnd ) {
// Restore the window if it is minimized.
if ( ::IsIconic( hwnd ) ) {
::ShowWindow( hwnd, SW_RESTORE );
}
// Use the OS call, if possible.
::SetForegroundWindow( hwnd );
} else {
// Use internal method.
win->Focus();
}
}
#ifdef DEBUG_law
#undef MOZ_DEBUG_DDE
#define MOZ_DEBUG_DDE 1
#endif
// Simple Win32 mutex wrapper.
struct Mutex {
Mutex( const char *name )
: mName( name ),
mHandle( 0 ),
mState( -1 ) {
mHandle = CreateMutex( 0, FALSE, mName.get() );
#if MOZ_DEBUG_DDE
printf( "CreateMutex error = 0x%08X\n", (int)GetLastError() );
#endif
}
~Mutex() {
if ( mHandle ) {
// Make sure we release it if we own it.
Unlock();
BOOL rc = CloseHandle( mHandle );
#if MOZ_DEBUG_DDE
if ( !rc ) {
printf( "CloseHandle error = 0x%08X\n", (int)GetLastError() );
}
#endif
}
}
BOOL Lock( DWORD timeout ) {
if ( mHandle ) {
#if MOZ_DEBUG_DDE
printf( "Waiting (%d msec) for DDE mutex...\n", (int)timeout );
#endif
mState = WaitForSingleObject( mHandle, timeout );
#if MOZ_DEBUG_DDE
printf( "...wait complete, result = 0x%08X, GetLastError=0x%08X\n", (int)mState, (int)::GetLastError() );
#endif
return mState == WAIT_OBJECT_0 || mState == WAIT_ABANDONED;
} else {
return FALSE;
}
}
void Unlock() {
if ( mHandle && mState == WAIT_OBJECT_0 ) {
#if MOZ_DEBUG_DDE
printf( "Releasing DDE mutex\n" );
#endif
ReleaseMutex( mHandle );
mState = -1;
}
}
private:
nsCString mName;
HANDLE mHandle;
DWORD mState;
};
/* DDE Notes
*
* This section describes the Win32 DDE service implementation for
* Mozilla. DDE is used on Win32 platforms to communicate between
* separate instances of mozilla.exe (or other Mozilla-based
* executables), or, between the Win32 desktop shell and Mozilla.
*
* The first instance of Mozilla will become the "server" and
* subsequent executables (and the shell) will use DDE to send
* requests to that process. The requests are DDE "execute" requests
* that pass the command line arguments.
*
* Mozilla registers the DDE application "Mozilla" and currently
* supports only the "WWW_OpenURL" topic. This should be reasonably
* compatible with applications that interfaced with Netscape
* Communicator (and its predecessors?). Note that even that topic
* may not be supported in a compatible fashion as the command-line
* options for Mozilla are different than for Communiator.
*
* It is imperative that at most one instance of Mozilla execute in
* "server mode" at any one time. The "native app support" in Mozilla
* on Win32 ensures that only the server process performs XPCOM
* initialization (that is not required for subsequent client processes
* to communicate with the server process).
*
* To guarantee that only one server starts up, a Win32 "mutex" is used
* to ensure only one process executes the server-detection code. That
* code consists of initializing DDE and doing a DdeConnect to Mozilla's
* application/topic. If that connection succeeds, then a server process
* must be running already.
*
* Otherwise, no server has started. In that case, the current process
* calls DdeNameService to register that application/topic. Only at that
* point does the mutex get released.
*
* There are a couple of subtleties that one should be aware of:
*
* 1. It is imperative that DdeInitialize be called only after the mutex
* lock has been obtained. The reason is that at shutdown, DDE
* notifications go out to all initialized DDE processes. Thus, if
* the mutex is owned by a terminating intance of Mozilla, then
* calling DdeInitialize and then WaitForSingleObject will cause the
* DdeUninitialize from the terminating process to "hang" until the
* process waiting for the mutex times out (and can then service the
* notification that the DDE server is terminating). So, don't mess
* with the sequence of things in the startup/shutdown logic.
*
* 2. All mutex requests are made with a reasonably long timeout value and
* are designed to "fail safe" (i.e., a timeout is treated as failure).
*
* 3. An attempt has been made to minimize the degree to which the main
* Mozilla application logic needs to be aware of the DDE mechanisms
* implemented herein. As a result, this module surfaces a very
* large-grained interface, consisting of simple start/stop methods.
* As a consequence, details of certain scenarios can be "lost."
* Particularly, incoming DDE requests can arrive after this module
* initiates the DDE server, but before Mozilla is initialized to the
* point where those requests can be serviced (e.g., open a browser
* window to a particular URL). Since the client process sends the
* request early on, it may not be prepared to respond to that error.
* Thus, such situations may fail silently. The design goal is that
* they fail harmlessly. Refinements on this point will be made as
* details emerge (and time permits).
*/
/* Update 2001 March
*
* A significant DDE bug in Windows is causing Mozilla to get wedged at
* startup. This is detailed in Bugzill bug 53952
* (http://bugzilla.mozilla.org/show_bug.cgi?id=53952).
*
* To resolve this, we are using a new strategy:
* o Use a "message window" to detect that Mozilla is already running and
* to pass requests from a second instance back to the first;
* o Run only as a "DDE server" (not as DDE client); this avoids the
* problematic call to DDEConnect().
*
* We still use the mutex semaphore to protect the code that detects
* whether Mozilla is already running.
*/
/* Update 2007 January
*
* A change in behavior was implemented in July 2004 which made the
* application on launch to add and on quit to remove the ddexec registry key.
* See bug 246078.
* Windows Vista has changed the methods used to set an application as default
* and the new methods are incompatible with removing the ddeexec registry key.
* See bug 353089.
*
* OS DDE Sequence:
* 1. OS checks if the dde name is registered.
* 2. If it is registered the OS sends a DDE request with the WWW_OpenURL topic
* and the params as specified in the default value of the ddeexec registry
* key for the verb (e.g. open).
* 3. If it isn't registered the OS launches the executable defined in the
* verb's (e.g. open) command registry key.
* 4. If the ifexec registry key is not present the OS sends a DDE request with
* the WWW_OpenURL topic and the params as specified in the default value of
* the ddeexec registry key for the verb (e.g. open).
* 5. If the ifexec registry key is present the OS sends a DDE request with the
* WWW_OpenURL topic and the params as specified in the ifexec registry key
* for the verb (e.g. open).
*
* Application DDE Sequence:
* 1. If the application is running a DDE request is received with the
* WWW_OpenURL topic and the params as specified in the default value of the
* ddeexec registry key (e.g. "%1",,0,0,,,, where '%1' is the url to open)
* for the verb (e.g. open).
* 2. If the application is not running it is launched with the -requestPending
* and the -url argument.
* 2.1 If the application does not need to restart and the -requestPending
* argument is present the accompanying url will not be used. Instead the
* application will wait for the DDE message to open the url.
* 2.2 If the application needs to restart the -requestPending argument is
* removed from the arguments used to restart the application and the url
* will be handled normally.
*
* Note: Due to a bug in IE the ifexec key should not be used (see bug 355650).
*/
class nsNativeAppSupportWin : public nsNativeAppSupportBase,
public nsIObserver
{
public:
NS_DECL_NSIOBSERVER
NS_DECL_ISUPPORTS_INHERITED
// Overrides of base implementation.
NS_IMETHOD Start( PRBool *aResult );
NS_IMETHOD Stop( PRBool *aResult );
NS_IMETHOD Quit();
NS_IMETHOD Enable();
// The "old" Start method (renamed).
NS_IMETHOD StartDDE();
// Utility function to handle a Win32-specific command line
// option: "-console", which dynamically creates a Windows
// console.
void CheckConsole();
private:
static HDDEDATA CALLBACK HandleDDENotification( UINT uType,
UINT uFmt,
HCONV hconv,
HSZ hsz1,
HSZ hsz2,
HDDEDATA hdata,
ULONG dwData1,
ULONG dwData2 );
static void HandleCommandLine(const char* aCmdLineString, nsIFile* aWorkingDir, PRUint32 aState);
static void ParseDDEArg( HSZ args, int index, nsCString& string);
static void ParseDDEArg( const char* args, int index, nsCString& aString);
static void ActivateLastWindow();
static HDDEDATA CreateDDEData( DWORD value );
static HDDEDATA CreateDDEData( LPBYTE value, DWORD len );
static PRBool InitTopicStrings();
static int FindTopic( HSZ topic );
static nsresult OpenWindow( const char *urlstr, const char *args );
static nsresult OpenBrowserWindow();
static nsresult ReParent( nsISupports *window, HWND newParent );
static void SetupSysTrayIcon();
static void RemoveSysTrayIcon();
static int mConversations;
enum {
topicOpenURL,
topicActivate,
topicCancelProgress,
topicVersion,
topicRegisterViewer,
topicUnRegisterViewer,
topicGetWindowInfo,
// Note: Insert new values above this line!!!!!
topicCount // Count of the number of real topics
};
static HSZ mApplication, mTopics[ topicCount ];
static DWORD mInstance;
static PRBool mCanHandleRequests;
static PRBool mSupportingDDEExec;
static char mMutexName[];
friend struct MessageWindow;
}; // nsNativeAppSupportWin
NS_INTERFACE_MAP_BEGIN(nsNativeAppSupportWin)
NS_INTERFACE_MAP_ENTRY(nsIObserver)
NS_INTERFACE_MAP_END_INHERITING(nsNativeAppSupportBase)
NS_IMPL_ADDREF_INHERITED(nsNativeAppSupportWin, nsNativeAppSupportBase)
NS_IMPL_RELEASE_INHERITED(nsNativeAppSupportWin, nsNativeAppSupportBase)
void
nsNativeAppSupportWin::CheckConsole() {
for ( int i = 1; i < gArgc; i++ ) {
if ( strcmp( "-console", gArgv[i] ) == 0
||
strcmp( "/console", gArgv[i] ) == 0 ) {
// Users wants to make sure we have a console.
// Try to allocate one.
BOOL rc = ::AllocConsole();
if ( rc ) {
// Console allocated. Fix it up so that output works in
// all cases. See http://support.microsoft.com/support/kb/articles/q105/3/05.asp.
// stdout
int hCrt = ::_open_osfhandle( (long)GetStdHandle( STD_OUTPUT_HANDLE ),
_O_TEXT );
if ( hCrt != -1 ) {
FILE *hf = ::_fdopen( hCrt, "w" );
if ( hf ) {
*stdout = *hf;
#ifdef DEBUG
::fprintf( stdout, "stdout directed to dynamic console\n" );
#endif
}
}
// stderr
hCrt = ::_open_osfhandle( (long)::GetStdHandle( STD_ERROR_HANDLE ),
_O_TEXT );
if ( hCrt != -1 ) {
FILE *hf = ::_fdopen( hCrt, "w" );
if ( hf ) {
*stderr = *hf;
#ifdef DEBUG
::fprintf( stderr, "stderr directed to dynamic console\n" );
#endif
}
}
// stdin?
/* Don't bother for now.
hCrt = ::_open_osfhandle( (long)::GetStdHandle( STD_INPUT_HANDLE ),
_O_TEXT );
if ( hCrt != -1 ) {
FILE *hf = ::_fdopen( hCrt, "r" );
if ( hf ) {
*stdin = *hf;
}
}
*/
} else {
// Failed. Probably because there already is one.
// There's little we can do, in any case.
}
// Remove the console argument from the command line.
do {
gArgv[i] = gArgv[i + 1];
++i;
} while (gArgv[i]);
--gArgc;
// Don't bother doing this more than once.
break;
}
}
return;
}
// Create and return an instance of class nsNativeAppSupportWin.
nsresult
NS_CreateNativeAppSupport( nsINativeAppSupport **aResult ) {
nsNativeAppSupportWin *pNative = new nsNativeAppSupportWin;
if (!pNative) return NS_ERROR_OUT_OF_MEMORY;
// Check for dynamic console creation request.
pNative->CheckConsole();
*aResult = pNative;
NS_ADDREF( *aResult );
return NS_OK;
}
// Constants
#define MOZ_DDE_APPLICATION "Mozilla"
#define MOZ_STARTUP_MUTEX_NAME "StartupMutex"
#define MOZ_DDE_START_TIMEOUT 30000
#define MOZ_DDE_STOP_TIMEOUT 15000
#define MOZ_DDE_EXEC_TIMEOUT 15000
// The array entries must match the enum ordering!
const char * const topicNames[] = { "WWW_OpenURL",
"WWW_Activate",
"WWW_CancelProgress",
"WWW_Version",
"WWW_RegisterViewer",
"WWW_UnRegisterViewer",
"WWW_GetWindowInfo" };
// Static member definitions.
int nsNativeAppSupportWin::mConversations = 0;
HSZ nsNativeAppSupportWin::mApplication = 0;
HSZ nsNativeAppSupportWin::mTopics[nsNativeAppSupportWin::topicCount] = { 0 };
DWORD nsNativeAppSupportWin::mInstance = 0;
PRBool nsNativeAppSupportWin::mCanHandleRequests = PR_FALSE;
PRBool nsNativeAppSupportWin::mSupportingDDEExec = PR_FALSE;
char nsNativeAppSupportWin::mMutexName[ 128 ] = { 0 };
// Message window encapsulation.
struct MessageWindow {
// ctor/dtor are simplistic
MessageWindow() {
// Try to find window.
mHandle = ::FindWindow( className(), 0 );
}
// Act like an HWND.
operator HWND() {
return mHandle;
}
// Class name: appName + "MessageWindow"
static const char *className() {
static char classNameBuffer[128];
static char *mClassName = 0;
if ( !mClassName ) {
::_snprintf( classNameBuffer,
sizeof classNameBuffer,
"%s%s",
gAppData->name,
"MessageWindow" );
mClassName = classNameBuffer;
}
return mClassName;
}
// Create: Register class and create window.
NS_IMETHOD Create() {
WNDCLASS classStruct = { 0, // style
&MessageWindow::WindowProc, // lpfnWndProc
0, // cbClsExtra
0, // cbWndExtra
0, // hInstance
0, // hIcon
0, // hCursor
0, // hbrBackground
0, // lpszMenuName
className() }; // lpszClassName
// Register the window class.
NS_ENSURE_TRUE( ::RegisterClass( &classStruct ), NS_ERROR_FAILURE );
// Create the window.
NS_ENSURE_TRUE( ( mHandle = ::CreateWindow( className(),
0, // title
WS_CAPTION, // style
0,0,0,0, // x, y, cx, cy
0, // parent
0, // menu
0, // instance
0 ) ), // create struct
NS_ERROR_FAILURE );
#if MOZ_DEBUG_DDE
printf( "Message window = 0x%08X\n", (int)mHandle );
#endif
return NS_OK;
}
// Destory: Get rid of window and reset mHandle.
NS_IMETHOD Destroy() {
nsresult retval = NS_OK;
if ( mHandle ) {
// DestroyWindow can only destroy windows created from
// the same thread.
BOOL desRes = DestroyWindow( mHandle );
if ( FALSE != desRes ) {
mHandle = NULL;
}
else {
retval = NS_ERROR_FAILURE;
}
}
return retval;
}
// SendRequest: Pass string via WM_COPYDATA to message window.
NS_IMETHOD SendRequest( const char *cmd ) {
// Construct a data buffer <commandline>\0<workingdir>\0
int cmdlen = strlen(cmd);
char* cmdbuf = (char*) malloc(cmdlen + MAX_PATH + 1);
if (!cmdbuf)
return NS_ERROR_OUT_OF_MEMORY;
strcpy(cmdbuf, cmd);
_getcwd(cmdbuf + cmdlen + 1, MAX_PATH);
// We used to set dwData to zero, when we didn't send the working dir.
// Now we're using it as a version number.
COPYDATASTRUCT cds = {
1,
cmdlen + strlen(cmdbuf + cmdlen + 1) + 2,
(void*) cmdbuf
};
// Bring the already running Mozilla process to the foreground.
// nsWindow will restore the window (if minimized) and raise it.
::SetForegroundWindow( mHandle );
::SendMessage( mHandle, WM_COPYDATA, 0, (LPARAM)&cds );
free (cmdbuf);
return NS_OK;
}
// Window proc.
static long CALLBACK WindowProc( HWND msgWindow, UINT msg, WPARAM wp, LPARAM lp ) {
if ( msg == WM_COPYDATA ) {
if (!nsNativeAppSupportWin::mCanHandleRequests)
return 0;
// This is an incoming request.
COPYDATASTRUCT *cds = (COPYDATASTRUCT*)lp;
#if MOZ_DEBUG_DDE
printf( "Incoming request: %s\n", (const char*)cds->lpData );
#endif
nsCOMPtr<nsILocalFile> workingDir;
if (1 >= cds->dwData) {
char* wdpath = (char*) cds->lpData;
// skip the command line, and get the working dir of the
// other process, which is after the first null char
while (*wdpath)
++wdpath;
++wdpath;
#ifdef MOZ_DEBUG_DDE
printf( "Working dir: %s\n", wdpath);
#endif
NS_NewNativeLocalFile(nsDependentCString(wdpath),
PR_FALSE,
getter_AddRefs(workingDir));
}
(void)nsNativeAppSupportWin::HandleCommandLine((char*)cds->lpData, workingDir, nsICommandLine::STATE_REMOTE_AUTO);
// Get current window and return its window handle.
nsCOMPtr<nsIDOMWindowInternal> win;
GetMostRecentWindow( 0, getter_AddRefs( win ) );
return win ? (long)hwndForDOMWindow( win ) : 0;
} else if ( msg == WM_QUERYENDSESSION ) {
if (!nsNativeAppSupportWin::mCanHandleRequests)
return 0;
// Invoke "-killAll" cmd line handler. That will close all open windows,
// and display dialog asking whether to save/don't save/cancel. If the
// user says cancel, then we pass that indicator along to the system
// in order to stop the system shutdown/logoff.
nsCOMPtr<nsICommandLineRunner> cmdLine
(do_CreateInstance("@mozilla.org/toolkit/command-line;1"));
char* argv[] = { "-killAll", 0 };
if (cmdLine &&
NS_SUCCEEDED(cmdLine->Init(1, argv, nsnull,
nsICommandLine::STATE_REMOTE_AUTO))) {
return cmdLine->Run() != NS_ERROR_ABORT;
}
}
return DefWindowProc( msgWindow, msg, wp, lp );
}
private:
HWND mHandle;
}; // struct MessageWindow
/* Start: Tries to find the "message window" to determine if it
* exists. If so, then Mozilla is already running. In that
* case, we use the handle to the "message" window and send
* a request corresponding to this process's command line
* options.
*
* If not, then this is the first instance of Mozilla. In
* that case, we create and set up the message window.
*
* The checking for existance of the message window must
* be protected by use of a mutex semaphore.
*/
NS_IMETHODIMP
nsNativeAppSupportWin::Start( PRBool *aResult ) {
NS_ENSURE_ARG( aResult );
NS_ENSURE_TRUE( mInstance == 0, NS_ERROR_NOT_INITIALIZED );
NS_ENSURE_STATE( gAppData );
if (getenv("MOZ_NO_REMOTE"))
{
*aResult = PR_TRUE;
return NS_OK;
}
nsresult rv = NS_ERROR_FAILURE;
*aResult = PR_FALSE;
// Grab mutex first.
// Build mutex name from app name.
::_snprintf( mMutexName, sizeof mMutexName, "%s%s", gAppData->name, MOZ_STARTUP_MUTEX_NAME );
Mutex startupLock = Mutex( mMutexName );
NS_ENSURE_TRUE( startupLock.Lock( MOZ_DDE_START_TIMEOUT ), NS_ERROR_FAILURE );
// Search for existing message window.
MessageWindow msgWindow;
if ( (HWND)msgWindow ) {
// We are a client process. Pass request to message window.
LPTSTR cmd = ::GetCommandLine();
rv = msgWindow.SendRequest( cmd );
} else {
// We will be server.
rv = msgWindow.Create();
if ( NS_SUCCEEDED( rv ) ) {
// Start up DDE server.
this->StartDDE();
// Tell caller to spin message loop.
*aResult = PR_TRUE;
}
}
startupLock.Unlock();
return rv;
}
PRBool
nsNativeAppSupportWin::InitTopicStrings() {
for ( int i = 0; i < topicCount; i++ ) {
if ( !( mTopics[ i ] = DdeCreateStringHandle( mInstance, NS_CONST_CAST(char *,topicNames[ i ]), CP_WINANSI ) ) ) {
return PR_FALSE;
}
}
return PR_TRUE;
}
int
nsNativeAppSupportWin::FindTopic( HSZ topic ) {
for ( int i = 0; i < topicCount; i++ ) {
if ( DdeCmpStringHandles( topic, mTopics[i] ) == 0 ) {
return i;
}
}
return -1;
}
// Utility function that determines if we're handling http Internet shortcuts.
static PRBool isDefaultBrowser()
{
#ifdef MOZ_PHOENIX
nsCOMPtr<nsIShellService> shell(do_GetService("@mozilla.org/browser/shell-service;1"));
PRBool isDefault;
shell->IsDefaultBrowser(PR_FALSE, &isDefault);
return isDefault;
#else
return FALSE;
#endif
}
// Start DDE server.
//
// This used to be the Start() method when we were using DDE as the
// primary IPC mechanism between secondary Mozilla processes and the
// initial "server" process.
//
// Now, it simply initializes the DDE server. The caller must check
// that this process is to be the server, and, must acquire the DDE
// startup mutex semaphore prior to calling this routine. See ::Start(),
// above.
NS_IMETHODIMP
nsNativeAppSupportWin::StartDDE() {
NS_ENSURE_TRUE( mInstance == 0, NS_ERROR_NOT_INITIALIZED );
// Initialize DDE.
NS_ENSURE_TRUE( DMLERR_NO_ERROR == DdeInitialize( &mInstance,
nsNativeAppSupportWin::HandleDDENotification,
APPCLASS_STANDARD,
0 ),
NS_ERROR_FAILURE );
// Allocate DDE strings.
NS_ENSURE_TRUE( ( mApplication = DdeCreateStringHandle( mInstance, (char*) gAppData->name, CP_WINANSI ) ) && InitTopicStrings(),
NS_ERROR_FAILURE );
// Next step is to register a DDE service.
NS_ENSURE_TRUE( DdeNameService( mInstance, mApplication, 0, DNS_REGISTER ), NS_ERROR_FAILURE );
#if MOZ_DEBUG_DDE
printf( "DDE server started\n" );
#endif
return NS_OK;
}
// If no DDE conversations are pending, terminate DDE.
NS_IMETHODIMP
nsNativeAppSupportWin::Stop( PRBool *aResult ) {
NS_ENSURE_ARG( aResult );
NS_ENSURE_TRUE( mInstance, NS_ERROR_NOT_INITIALIZED );
nsresult rv = NS_OK;
*aResult = PR_TRUE;
Mutex ddeLock( mMutexName );
if ( ddeLock.Lock( MOZ_DDE_STOP_TIMEOUT ) ) {
if ( mConversations == 0 ) {
this->Quit();
} else {
*aResult = PR_FALSE;
}
ddeLock.Unlock();
}
else {
// No DDE application name specified, but that's OK. Just
// forge ahead.
*aResult = PR_TRUE;
}
return rv;
}
NS_IMETHODIMP
nsNativeAppSupportWin::Observe(nsISupports* aSubject, const char* aTopic,
const PRUnichar* aData)
{
if (strcmp(aTopic, "quit-application") == 0) {
Quit();
} else {
NS_ERROR("Unexpected observer topic.");
}
return NS_OK;
}
// Terminate DDE regardless.
NS_IMETHODIMP
nsNativeAppSupportWin::Quit() {
// If another process wants to look for the message window, they need
// to wait to hold the lock, in which case they will not find the
// window as we will destroy ours under our lock.
// When the mutex goes off the stack, it is unlocked via destructor.
Mutex mutexLock(mMutexName);
NS_ENSURE_TRUE(mutexLock.Lock(MOZ_DDE_START_TIMEOUT), NS_ERROR_FAILURE);
// If we've got a message window to receive IPC or new window requests,
// get rid of it as we are shutting down.
// Note: Destroy calls DestroyWindow, which will only work on a window
// created by the same thread.
MessageWindow mw;
mw.Destroy();
if ( mInstance ) {
// Unregister application name.
DdeNameService( mInstance, mApplication, 0, DNS_UNREGISTER );
// Clean up strings.
if ( mApplication ) {
DdeFreeStringHandle( mInstance, mApplication );
mApplication = 0;
}
for ( int i = 0; i < topicCount; i++ ) {
if ( mTopics[i] ) {
DdeFreeStringHandle( mInstance, mTopics[i] );
mTopics[i] = 0;
}
}
DdeUninitialize( mInstance );
mInstance = 0;
#if MOZ_DEBUG_DDE
printf( "DDE server stopped\n" );
#endif
}
return NS_OK;
}
NS_IMETHODIMP
nsNativeAppSupportWin::Enable()
{
mCanHandleRequests = PR_TRUE;
nsCOMPtr<nsIObserverService> obs
(do_GetService("@mozilla.org/observer-service;1"));
if (obs) {
obs->AddObserver(this, "quit-application", PR_FALSE);
} else {
NS_ERROR("No observer service?");
}
return NS_OK;
}
#if MOZ_DEBUG_DDE
// Macro to generate case statement for a given XTYP value.
#define XTYP_CASE(t) \
case t: result = #t; break
static nsCString uTypeDesc( UINT uType ) {
nsCString result;
switch ( uType ) {
XTYP_CASE(XTYP_ADVSTART);
XTYP_CASE(XTYP_CONNECT);
XTYP_CASE(XTYP_ADVREQ);
XTYP_CASE(XTYP_REQUEST);
XTYP_CASE(XTYP_WILDCONNECT);
XTYP_CASE(XTYP_ADVDATA);
XTYP_CASE(XTYP_EXECUTE);
XTYP_CASE(XTYP_POKE);
XTYP_CASE(XTYP_ADVSTOP);
XTYP_CASE(XTYP_CONNECT_CONFIRM);
XTYP_CASE(XTYP_DISCONNECT);
XTYP_CASE(XTYP_ERROR);
XTYP_CASE(XTYP_MONITOR);
XTYP_CASE(XTYP_REGISTER);
XTYP_CASE(XTYP_XACT_COMPLETE);
XTYP_CASE(XTYP_UNREGISTER);
default: result = "XTYP_?????";
}
return result;
}
static nsCString hszValue( DWORD instance, HSZ hsz ) {
// Extract string from HSZ.
nsCString result("[");
DWORD len = DdeQueryString( instance, hsz, NULL, NULL, CP_WINANSI );
if ( len ) {
char buffer[ 256 ];
DdeQueryString( instance, hsz, buffer, sizeof buffer, CP_WINANSI );
result += buffer;
}
result += "]";
return result;
}
#else
// These are purely a safety measure to avoid the infamous "won't
// build non-debug" type Tinderbox flames.
static nsCString uTypeDesc( UINT ) {
return nsCString( "?" );
}
static nsCString hszValue( DWORD, HSZ ) {
return nsCString( "?" );
}
#endif
// Utility function to escape double-quotes within a string.
static void escapeQuotes( nsAString &aString ) {
PRInt32 offset = -1;
while( 1 ) {
// Find next '"'.
offset = aString.FindChar( '"', ++offset );
if ( offset == kNotFound ) {
// No more quotes, exit.
break;
} else {
// Insert back-slash ahead of the '"'.
aString.Insert( PRUnichar('\\'), offset );
// Increment offset because we just inserted a slash
offset++;
}
}
return;
}
HDDEDATA CALLBACK
nsNativeAppSupportWin::HandleDDENotification( UINT uType, // transaction type
UINT uFmt, // clipboard data format
HCONV hconv, // handle to the conversation
HSZ hsz1, // handle to a string
HSZ hsz2, // handle to a string
HDDEDATA hdata, // handle to a global memory object
ULONG dwData1, // transaction-specific data
ULONG dwData2 ) { // transaction-specific data
if (!mCanHandleRequests)
return 0;
#if MOZ_DEBUG_DDE
printf( "DDE: uType =%s\n", uTypeDesc( uType ).get() );
printf( " uFmt =%u\n", (unsigned)uFmt );
printf( " hconv =%08x\n", (int)hconv );
printf( " hsz1 =%08x:%s\n", (int)hsz1, hszValue( mInstance, hsz1 ).get() );
printf( " hsz2 =%08x:%s\n", (int)hsz2, hszValue( mInstance, hsz2 ).get() );
printf( " hdata =%08x\n", (int)hdata );
printf( " dwData1=%08x\n", (int)dwData1 );
printf( " dwData2=%08x\n", (int)dwData2 );
#endif
HDDEDATA result = 0;
if ( uType & XCLASS_BOOL ) {
switch ( uType ) {
case XTYP_CONNECT:
// Make sure its for our service/topic.
if ( FindTopic( hsz1 ) != -1 ) {
// We support this connection.
result = (HDDEDATA)1;
}
break;
case XTYP_CONNECT_CONFIRM:
// We don't care about the conversation handle, at this point.
result = (HDDEDATA)1;
break;
}
} else if ( uType & XCLASS_DATA ) {
if ( uType == XTYP_REQUEST ) {
switch ( FindTopic( hsz1 ) ) {
case topicOpenURL: {
// Open a given URL...
// Get the URL from the first argument in the command.
nsCAutoString url;
ParseDDEArg(hsz2, 0, url);
// Read the 3rd argument in the command to determine if a
// new window is to be used.
nsCAutoString windowID;
ParseDDEArg(hsz2, 2, windowID);
// "" means to open the URL in a new window.
if ( windowID.Equals( "" ) ) {
url.Insert("mozilla -new-window ", 0);
}
else {
url.Insert("mozilla -url ", 0);
}
#if MOZ_DEBUG_DDE
printf( "Handling dde XTYP_REQUEST request: [%s]...\n", url.get() );
#endif
// Now handle it.
HandleCommandLine(url.get(), nsnull, nsICommandLine::STATE_REMOTE_EXPLICIT);
// Return pseudo window ID.
result = CreateDDEData( 1 );
break;
}
case topicGetWindowInfo: {
// This topic has to get the current URL, get the current
// page title and then format the output into the DDE
// return string. The return value is "URL","Page Title",
// "Window ID" however the window ID is not used for this
// command, therefore it is returned as a null string
// This isn't really a loop. We just use "break"
// statements to bypass the remaining steps when
// something goes wrong.
do {
// Get most recently used Nav window.
nsCOMPtr<nsIDOMWindowInternal> navWin;
GetMostRecentWindow( NS_LITERAL_STRING( "navigator:browser" ).get(),
getter_AddRefs( navWin ) );
if ( !navWin ) {
// There is not a window open
break;
}
// Get content window.
nsCOMPtr<nsIDOMWindow> content;
navWin->GetContent( getter_AddRefs( content ) );
if ( !content ) {
break;
}
// Convert that to internal interface.
nsCOMPtr<nsIDOMWindowInternal> internalContent( do_QueryInterface( content ) );
if ( !internalContent ) {
break;
}
// Get location.
nsCOMPtr<nsIDOMLocation> location;
internalContent->GetLocation( getter_AddRefs( location ) );
if ( !location ) {
break;
}
// Get href for URL.
nsAutoString url;
if ( NS_FAILED( location->GetHref( url ) ) ) {
break;
}
// Escape any double-quotes.
escapeQuotes( url );
// Now for the title; first, get the "window" script global object.
nsCOMPtr<nsIScriptGlobalObject> scrGlobalObj( do_QueryInterface( internalContent ) );
if ( !scrGlobalObj ) {
break;
}
// Then from its doc shell get the base window...
nsCOMPtr<nsIBaseWindow> baseWindow =
do_QueryInterface( scrGlobalObj->GetDocShell() );
if ( !baseWindow ) {
break;
}
// And from the base window we can get the title.
nsXPIDLString title;
if(!baseWindow) {
break;
}
baseWindow->GetTitle(getter_Copies(title));
// Escape any double-quotes in the title.
escapeQuotes( title );
// Use a string buffer for the output data, first
// save a quote.
nsCAutoString outpt( NS_LITERAL_CSTRING("\"") );
// Now copy the URL converting the Unicode string
// to a single-byte ASCII string
nsCAutoString tmpNativeStr;
NS_CopyUnicodeToNative( url, tmpNativeStr );
outpt.Append( tmpNativeStr );
// Add the "," used to separate the URL and the page
// title
outpt.Append( NS_LITERAL_CSTRING("\",\"") );
// Now copy the current page title to the return string
NS_CopyUnicodeToNative( title, tmpNativeStr );
outpt.Append( tmpNativeStr );
// Fill out the return string with the remainin ",""
outpt.Append( NS_LITERAL_CSTRING( "\",\"\"" ));
// Create a DDE handle to a char string for the data
// being returned, this copies and creates a "shared"
// copy of the DDE response until the calling APP
// reads it and says it can be freed.
result = CreateDDEData( (LPBYTE)(const char*)outpt.get(),
outpt.Length() + 1 );
#if MOZ_DEBUG_DDE
printf( "WWW_GetWindowInfo->%s\n", outpt.get() );
#endif
} while ( PR_FALSE );
break;
}
case topicActivate: {
// Activate a Nav window...
nsCAutoString windowID;
ParseDDEArg(hsz2, 0, windowID);
// 4294967295 is decimal for 0xFFFFFFFF which is also a
// correct value to do that Activate last window stuff
if ( windowID.Equals( "-1" ) ||
windowID.Equals( "4294967295" ) ) {
// We only support activating the most recent window (or a new one).
ActivateLastWindow();
// Return pseudo window ID.
result = CreateDDEData( 1 );
}
break;
}
case topicVersion: {
// Return version. We're restarting at 1.0!
DWORD version = 1 << 16; // "1.0"
result = CreateDDEData( version );
break;
}
case topicRegisterViewer: {
// Register new viewer (not implemented).
result = CreateDDEData( PR_FALSE );
break;
}
case topicUnRegisterViewer: {
// Unregister new viewer (not implemented).
result = CreateDDEData( PR_FALSE );
break;
}
default:
break;
}
} else if ( uType & XTYP_POKE ) {
switch ( FindTopic( hsz1 ) ) {
case topicCancelProgress: {
// "Handle" progress cancel (actually, pretty much ignored).
result = (HDDEDATA)DDE_FACK;
break;
}
default:
break;
}
}
} else if ( uType & XCLASS_FLAGS ) {
if ( uType == XTYP_EXECUTE ) {
// Prove that we received the request.
DWORD bytes;
LPBYTE request = DdeAccessData( hdata, &bytes );
#if MOZ_DEBUG_DDE
printf( "Handling dde request: [%s]...\n", (char*)request );
#endif
// Default is to open in current window.
PRBool new_window = PR_FALSE;
nsCAutoString url;
ParseDDEArg((const char*) request, 0, url);
// Read the 3rd argument in the command to determine if a
// new window is to be used.
nsCAutoString windowID;
ParseDDEArg((const char*) request, 2, windowID);
// "" means to open the URL in a new window.
if ( windowID.Equals( "" ) ) {
url.Insert("mozilla -new-window ", 0);
}
else {
url.Insert("mozilla -url ", 0);
}
#if MOZ_DEBUG_DDE
printf( "Handling dde XTYP_REQUEST request: [%s]...\n", url.get() );
#endif
// Now handle it.
HandleCommandLine(url.get(), nsnull, nsICommandLine::STATE_REMOTE_EXPLICIT);
// Release the data.
DdeUnaccessData( hdata );
result = (HDDEDATA)DDE_FACK;
} else {
result = (HDDEDATA)DDE_FNOTPROCESSED;
}
} else if ( uType & XCLASS_NOTIFICATION ) {
}
#if MOZ_DEBUG_DDE
printf( "DDE result=%d (0x%08X)\n", (int)result, (int)result );
#endif
return result;
}
// Utility function to advance to end of quoted string.
// p+offset must point to the comma preceding the arg on entry.
// On return, p+result points to the closing '"' (or end of the string
// if the closing '"' is missing) if the arg is quoted. If the arg
// is not quoted, then p+result will point to the first character
// of the arg.
static PRInt32 advanceToEndOfQuotedArg( const char *p, PRInt32 offset, PRInt32 len ) {
// Check whether the current arg is quoted.
if ( p[++offset] == '"' ) {
// Advance past the closing quote.
while ( offset < len && p[++offset] != '"' ) {
// If the current character is a backslash, then the
// next character can't be a *real* '"', so skip it.
if ( p[offset] == '\\' ) {
offset++;
}
}
}
return offset;
}
void nsNativeAppSupportWin::ParseDDEArg( const char* args, int index, nsCString& aString) {
if ( args ) {
int argLen = strlen(args);
nsDependentCString temp(args, argLen);
// offset points to the comma preceding the desired arg.
PRInt32 offset = -1;
// Skip commas till we get to the arg we want.
while( index-- ) {
// If this arg is quoted, then go to closing quote.
offset = advanceToEndOfQuotedArg( args, offset, argLen);
// Find next comma.
offset = temp.FindChar( ',', offset );
if ( offset == kNotFound ) {
// No more commas, give up.
aString = args;
return;
}
}
// The desired argument starts just past the preceding comma,
// which offset points to, and extends until the following
// comma (or the end of the string).
//
// Since the argument might be enclosed in quotes, we need to
// deal with that before searching for the terminating comma.
// We advance offset so it ends up pointing to the start of
// the argument we want.
PRInt32 end = advanceToEndOfQuotedArg( args, offset++, argLen );
// Find next comma (or end of string).
end = temp.FindChar( ',', end );
if ( end == kNotFound ) {
// Arg is the rest of the string.
end = argLen;
}
// Extract result.
aString.Assign( args + offset, end - offset );
}
return;
}
// Utility to parse out argument from a DDE item string.
void nsNativeAppSupportWin::ParseDDEArg( HSZ args, int index, nsCString& aString) {
DWORD argLen = DdeQueryString( mInstance, args, NULL, NULL, CP_WINANSI );
// there wasn't any string, so return empty string
if ( !argLen ) return;
nsCAutoString temp;
// Ensure result's buffer is sufficiently big.
temp.SetLength( argLen );
// Now get the string contents.
DdeQueryString( mInstance, args, temp.BeginWriting(), temp.Length(), CP_WINANSI );
// Parse out the given arg.
ParseDDEArg(temp.get(), index, aString);
return;
}
void nsNativeAppSupportWin::ActivateLastWindow() {
nsCOMPtr<nsIDOMWindowInternal> navWin;
GetMostRecentWindow( NS_LITERAL_STRING("navigator:browser").get(), getter_AddRefs( navWin ) );
if ( navWin ) {
// Activate that window.
activateWindow( navWin );
} else {
// Need to create a Navigator window, then.
OpenBrowserWindow();
}
}
HDDEDATA nsNativeAppSupportWin::CreateDDEData( DWORD value ) {
return CreateDDEData( (LPBYTE)&value, sizeof value );
}
HDDEDATA nsNativeAppSupportWin::CreateDDEData( LPBYTE value, DWORD len ) {
HDDEDATA result = DdeCreateDataHandle( mInstance,
value,
len,
0,
mApplication,
CF_TEXT,
0 );
return result;
}
void
nsNativeAppSupportWin::HandleCommandLine(const char* aCmdLineString,
nsIFile* aWorkingDir,
PRUint32 aState)
{
nsresult rv;
int justCounting = 1;
char **argv = 0;
// Flags, etc.
int init = 1;
int between, quoted, bSlashCount;
int argc;
const char *p;
nsCAutoString arg;
nsCOMPtr<nsICommandLineRunner> cmdLine
(do_CreateInstance("@mozilla.org/toolkit/command-line;1"));
if (!cmdLine) {
NS_ERROR("Couldn't create command line!");
return;
}
// Parse command line args according to MS spec
// (see "Parsing C++ Command-Line Arguments" at
// http://msdn.microsoft.com/library/devprods/vs6/visualc/vclang/_pluslang_parsing_c.2b2b_.command.2d.line_arguments.htm).
// We loop if we've not finished the second pass through.
while ( 1 ) {
// Initialize if required.
if ( init ) {
p = aCmdLineString;
between = 1;
argc = quoted = bSlashCount = 0;
init = 0;
}
if ( between ) {
// We are traversing whitespace between args.
// Check for start of next arg.
if ( *p != 0 && !isspace( *p ) ) {
// Start of another arg.
between = 0;
arg = "";
switch ( *p ) {
case '\\':
// Count the backslash.
bSlashCount = 1;
break;
case '"':
// Remember we're inside quotes.
quoted = 1;
break;
default:
// Add character to arg.
arg += *p;
break;
}
} else {
// Another space between args, ignore it.
}
} else {
// We are processing the contents of an argument.
// Check for whitespace or end.
if ( *p == 0 || ( !quoted && isspace( *p ) ) ) {
// Process pending backslashes (interpret them
// literally since they're not followed by a ").
while( bSlashCount ) {
arg += '\\';
bSlashCount--;
}
// End current arg.
if ( !justCounting ) {
argv[argc] = new char[ arg.Length() + 1 ];
strcpy( argv[argc], arg.get() );
}
argc++;
// We're now between args.
between = 1;
} else {
// Still inside argument, process the character.
switch ( *p ) {
case '"':
// First, digest preceding backslashes (if any).
while ( bSlashCount > 1 ) {
// Put one backsplash in arg for each pair.
arg += '\\';
bSlashCount -= 2;
}
if ( bSlashCount ) {
// Quote is literal.
arg += '"';
bSlashCount = 0;
} else {
// Quote starts or ends a quoted section.
if ( quoted ) {
// Check for special case of consecutive double
// quotes inside a quoted section.
if ( *(p+1) == '"' ) {
// This implies a literal double-quote. Fake that
// out by causing next double-quote to look as
// if it was preceded by a backslash.
bSlashCount = 1;
} else {
quoted = 0;
}
} else {
quoted = 1;
}
}
break;
case '\\':
// Add to count.
bSlashCount++;
break;
default:
// Accept any preceding backslashes literally.
while ( bSlashCount ) {
arg += '\\';
bSlashCount--;
}
// Just add next char to the current arg.
arg += *p;
break;
}
}
}
// Check for end of input.
if ( *p ) {
// Go to next character.
p++;
} else {
// If on first pass, go on to second.
if ( justCounting ) {
// Allocate argv array.
argv = new char*[ argc ];
// Start second pass
justCounting = 0;
init = 1;
} else {
// Quit.
break;
}
}
}
rv = cmdLine->Init(argc, argv, aWorkingDir, aState);
// Cleanup.
while ( argc ) {
delete [] argv[ --argc ];
}
delete [] argv;
if (NS_FAILED(rv)) {
NS_ERROR("Error initializing command line.");
return;
}
cmdLine->Run();
}
nsresult
nsNativeAppSupportWin::OpenWindow( const char*urlstr, const char *args ) {
nsresult rv = NS_ERROR_FAILURE;
nsCOMPtr<nsIWindowWatcher> wwatch(do_GetService(NS_WINDOWWATCHER_CONTRACTID));
nsCOMPtr<nsISupportsCString> sarg(do_CreateInstance(NS_SUPPORTS_CSTRING_CONTRACTID));
if (sarg)
sarg->SetData(nsDependentCString(args));
if (wwatch && sarg) {
nsCOMPtr<nsIDOMWindow> newWindow;
rv = wwatch->OpenWindow(0, urlstr, "_blank", "chrome,dialog=no,all",
sarg, getter_AddRefs(newWindow));
#if MOZ_DEBUG_DDE
} else {
printf("Get WindowWatcher (or create string) failed\n");
#endif
}
return rv;
}
HWND hwndForDOMWindow( nsISupports *window ) {
nsCOMPtr<nsIScriptGlobalObject> ppScriptGlobalObj( do_QueryInterface(window) );
if ( !ppScriptGlobalObj ) {
return 0;
}
nsCOMPtr<nsIBaseWindow> ppBaseWindow =
do_QueryInterface( ppScriptGlobalObj->GetDocShell() );
if ( !ppBaseWindow ) {
return 0;
}
nsCOMPtr<nsIWidget> ppWidget;
ppBaseWindow->GetMainWidget( getter_AddRefs( ppWidget ) );
return (HWND)( ppWidget->GetNativeData( NS_NATIVE_WIDGET ) );
}
static const char sJSStackContractID[] = "@mozilla.org/js/xpc/ContextStack;1";
class SafeJSContext {
public:
SafeJSContext();
~SafeJSContext();
nsresult Push();
JSContext *get() { return mContext; }
protected:
nsCOMPtr<nsIThreadJSContextStack> mService;
JSContext *mContext;
};
SafeJSContext::SafeJSContext() : mContext(nsnull) {
}
SafeJSContext::~SafeJSContext() {
JSContext *cx;
nsresult rv;
if(mContext) {
rv = mService->Pop(&cx);
NS_ASSERTION(NS_SUCCEEDED(rv) && cx == mContext, "JSContext push/pop mismatch");
}
}
nsresult SafeJSContext::Push() {
if (mContext) // only once
return NS_ERROR_FAILURE;
mService = do_GetService(sJSStackContractID);
if(mService) {
JSContext *cx;
if (NS_SUCCEEDED(mService->GetSafeJSContext(&cx)) &&
cx &&
NS_SUCCEEDED(mService->Push(cx))) {
// Save cx in mContext to indicate need to pop.
mContext = cx;
}
}
return mContext ? NS_OK : NS_ERROR_FAILURE;
}
nsresult
nsNativeAppSupportWin::OpenBrowserWindow()
{
nsresult rv = NS_OK;
// Open the argument URL in the most recently used Navigator window.
// If there is no Nav window, open a new one.
// If at all possible, hand the request off to the most recent
// browser window.
nsCOMPtr<nsIDOMWindowInternal> navWin;
GetMostRecentWindow( NS_LITERAL_STRING( "navigator:browser" ).get(), getter_AddRefs( navWin ) );
// This isn't really a loop. We just use "break" statements to fall
// out to the OpenWindow call when things go awry.
do {
// If caller requires a new window, then don't use an existing one.
if ( !navWin ) {
// Have to open a new one.
break;
}
nsCOMPtr<nsIBrowserDOMWindow> bwin;
{ // scope a bunch of temporary cruft used to generate bwin
nsCOMPtr<nsIWebNavigation> navNav( do_GetInterface( navWin ) );
nsCOMPtr<nsIDocShellTreeItem> navItem( do_QueryInterface( navNav ) );
if ( navItem ) {
nsCOMPtr<nsIDocShellTreeItem> rootItem;
navItem->GetRootTreeItem( getter_AddRefs( rootItem ) );
nsCOMPtr<nsIDOMWindow> rootWin( do_GetInterface( rootItem ) );
nsCOMPtr<nsIDOMChromeWindow> chromeWin(do_QueryInterface(rootWin));
if ( chromeWin )
chromeWin->GetBrowserDOMWindow( getter_AddRefs ( bwin ) );
}
}
if ( bwin ) {
nsCOMPtr<nsIURI> uri;
NS_NewURI( getter_AddRefs( uri ), NS_LITERAL_CSTRING("about:blank"), 0, 0 );
if ( uri ) {
nsCOMPtr<nsIDOMWindow> container;
rv = bwin->OpenURI( uri, 0,
nsIBrowserDOMWindow::OPEN_DEFAULTWINDOW,
nsIBrowserDOMWindow::OPEN_EXTERNAL,
getter_AddRefs( container ) );
if ( NS_SUCCEEDED( rv ) )
return NS_OK;
}
}
NS_ERROR("failed to hand off external URL to extant window\n");
} while ( PR_FALSE );
// open a new window if caller requested it or if anything above failed
char* argv[] = { 0 };
nsCOMPtr<nsICommandLineRunner> cmdLine
(do_CreateInstance("@mozilla.org/toolkit/command-line;1"));
NS_ENSURE_TRUE(cmdLine, NS_ERROR_FAILURE);
rv = cmdLine->Init(0, argv, nsnull, nsICommandLine::STATE_REMOTE_EXPLICIT);
NS_ENSURE_SUCCESS(rv, rv);
return cmdLine->Run();
}
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