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Bug 136188; add support for WWW_GetWindowInfo DDE topic; r=John Weilander (support@kaylon.com); sr=roc+moz@cs.cmu.edu

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This commit is contained in:
law%netscape.com 2002-04-23 23:48:00 +00:00
parent 40d6505f73
commit 815d760202
1 changed files with 191 additions and 17 deletions
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208
xpfe/bootstrap/nsNativeAppSupportWin.cpp
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@ -367,6 +367,7 @@ private:
static nsCString ParseDDEArg( HSZ args, int index );
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 GetCmdLineArgs( LPBYTE request, nsICmdLineService **aResult );
@ -386,6 +387,7 @@ private:
topicVersion,
topicRegisterViewer,
topicUnRegisterViewer,
topicGetWindowInfo,
// Note: Insert new values above this line!!!!!
topicCount // Count of the number of real topics
};
@ -725,7 +727,8 @@ const char * const topicNames[] = { "WWW_OpenURL",
"WWW_CancelProgress",
"WWW_Version",
"WWW_RegisterViewer",
"WWW_UnRegisterViewer" };
"WWW_UnRegisterViewer",
"WWW_GetWindowInfo" };
// Static member definitions.
int nsNativeAppSupportWin::mConversations = 0;
@ -1169,6 +1172,25 @@ static nsCString hszValue( DWORD, HSZ ) {
#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
@ -1210,18 +1232,128 @@ nsNativeAppSupportWin::HandleDDENotification( UINT uType, // transaction t
switch ( FindTopic( hsz1 ) ) {
case topicOpenURL: {
// Open a given URL...
nsCString url = ParseDDEArg( hsz2, 0 );
// Default is to open in current window.
PRBool new_window = PR_FALSE;
// Get the URL from the first argument in the command.
nsCAutoString url( ParseDDEArg( hsz2, 0 ) );
// Read the 3rd argument in the command to determine if a
// new window is to be used.
nsCAutoString windowID( ParseDDEArg( hsz2, 2 ) );
// "0" means to open the URL in a new window.
if ( windowID.Equals( "0" ) ) {
new_window = PR_TRUE;
}
// Make it look like command line args.
url.Insert( "mozilla -url ", 0 );
#if MOZ_DEBUG_DDE
printf( "Handling dde XTYP_REQUEST request: [%s]...\n", url.get() );
#endif
// Now handle it.
HandleRequest( LPBYTE( url.get() ), PR_FALSE );
HandleRequest( LPBYTE( url.get() ), new_window );
// 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" JS object.
nsCOMPtr<nsIScriptGlobalObject> scrGlobalObj( do_QueryInterface( internalContent ) );
if ( !scrGlobalObj ) {
break;
}
// Then the doc shell...
nsCOMPtr<nsIDocShell> docShell;
scrGlobalObj->GetDocShell( getter_AddRefs( docShell ) );
if ( !docShell ) {
break;
}
// And from that the base window...
nsCOMPtr<nsIBaseWindow> baseWindow( do_QueryInterface( docShell ) );
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
outpt.Append( NS_LossyConvertUCS2toASCII( url ) );
// 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
outpt.Append( NS_LossyConvertUCS2toASCII( title.get() ));
// 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 );
#ifdef MOZ_DEBUG_DDE
printf( "WWW_GetWindowInfo->%s\n", outpt.get() );
#endif
} while ( PR_FALSE );
break;
}
case topicActivate: {
// Activate a Nav window...
nsCString windowID = ParseDDEArg( hsz2, 0 );
@ -1290,6 +1422,27 @@ nsNativeAppSupportWin::HandleDDENotification( UINT uType, // transaction t
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;
}
// Utility to parse out argument from a DDE item string.
nsCString nsNativeAppSupportWin::ParseDDEArg( HSZ args, int index ) {
nsCString result;
@ -1300,22 +1453,39 @@ nsCString nsNativeAppSupportWin::ParseDDEArg( HSZ args, int index ) {
temp.SetLength( argLen + 1 );
// Now get the string contents.
DdeQueryString( mInstance, args, (char*)temp.get(), temp.Length(), CP_WINANSI );
// Parse out the given arg. We assume there's no commas within quoted strings
// (which may not be accurate, but makes life so much easier).
// Parse out the given arg.
const char *p = temp.get();
// Skip index commas.
PRInt32 offset = index ? temp.FindChar( ',', 0, index ) : 0;
if ( offset != -1 ) {
// Desired argument starts there and ends at next comma.
PRInt32 end = temp.FindChar( ',', offset+1 );
if ( end == -1 ) {
// Rest of string.
end = temp.Length();
// 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( p, offset, argLen );
// Find next comma.
offset = temp.FindChar( ',', offset );
if ( offset == kNotFound ) {
// No more commas, give up.
return result;
}
// Extract result.
result.Assign( temp.get() + offset, end - offset );
}
// 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( p, 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.
result.Assign( p + offset, end - offset );
}
return result;
}
@ -1333,9 +1503,13 @@ void nsNativeAppSupportWin::ActivateLastWindow() {
}
HDDEDATA nsNativeAppSupportWin::CreateDDEData( DWORD value ) {
return CreateDDEData( (LPBYTE)&value, sizeof value );
}
HDDEDATA nsNativeAppSupportWin::CreateDDEData( LPBYTE value, DWORD len ) {
HDDEDATA result = DdeCreateDataHandle( mInstance,
(LPBYTE)&value,
sizeof value,
value,
len,
0,
mApplication,
CF_TEXT,