Bug 234752 - Print code returns NS_OK in cases where it should return

an error.  Patch by roland.mainz@nrubsig.org, r+sr=roc.

content/base/src/nsDocumentViewer.cpp

@@ -3069,7 +3069,8 @@ DocumentViewerImpl::Print(nsIPrintSettings*       aPrintSettings,
       mCachedPrintWebProgressListner = aWebProgressListener;
       mPrintIsPending                = PR_TRUE;
     }
-    return NS_OK;
+    PR_PL(("Printing Stopped - document is still busy!"));
+    return NS_ERROR_GFX_PRINTER_DOC_IS_BUSY;
   }
 
   nsCOMPtr<nsIPresShell> presShell;
@@ -3120,8 +3121,9 @@ DocumentViewerImpl::Print(nsIPrintSettings*       aPrintSettings,
   }
   return rv;
 #else
-  return NS_ERROR_FAILURE;
-#endif
+  PR_PL(("NS_PRINTING not defined - printing not implemented in this build!"));
+  return NS_ERROR_GFX_PRINTING_NOT_IMPLEMENTED;
+#endif /* NS_PRINTING */
 }
 
 /** ---------------------------------------------------

content/base/src/nsPrintEngine.cpp

@@ -2219,18 +2219,22 @@ void
 nsPrintEngine::ShowPrintErrorDialog(nsresult aPrintError, PRBool aIsPrinting)
 {
   nsresult rv;
+  
+  PR_PL(("nsPrintEngine::ShowPrintErrorDialog(nsresult aPrintError=%lx, PRBool aIsPrinting=%d)\n", (long)rv, (int)aIsPrinting));
 
   static NS_DEFINE_CID(kCStringBundleServiceCID,  NS_STRINGBUNDLESERVICE_CID);
   nsCOMPtr<nsIStringBundleService> stringBundleService = do_GetService(kCStringBundleServiceCID);
 
   if (!stringBundleService) {
-    NS_WARNING("ERROR: Failed to get StringBundle Service instance.\n");
+    PR_PL(("ShowPrintErrorDialog: Failed to get StringBundle Service instance.\n"));
     return;
   }
   nsCOMPtr<nsIStringBundle> myStringBundle;
   rv = stringBundleService->CreateBundle(NS_ERROR_GFX_PRINTER_BUNDLE_URL, getter_AddRefs(myStringBundle));
-  if (NS_FAILED(rv))
+  if (NS_FAILED(rv)) {
+    PR_PL(("ShowPrintErrorDialog(): CreateBundle() failure for NS_ERROR_GFX_PRINTER_BUNDLE_URL, rv=%lx\n", (long)rv));
     return;
+  }
 
   nsXPIDLString msg,
                 title;
@@ -2273,6 +2277,9 @@ nsPrintEngine::ShowPrintErrorDialog(nsresult aPrintError, PRBool aIsPrinting)
       NS_ERROR_TO_LOCALIZED_PRINT_ERROR_MSG(NS_ERROR_GFX_NO_PRINTROMPTSERVICE)
       NS_ERROR_TO_LOCALIZED_PRINT_ERROR_MSG(NS_ERROR_GFX_PRINTER_XPRINT_NO_XPRINT_SERVERS_FOUND)
       NS_ERROR_TO_LOCALIZED_PRINT_ERROR_MSG(NS_ERROR_GFX_PRINTER_PLEX_NOT_SUPPORTED)
+      NS_ERROR_TO_LOCALIZED_PRINT_ERROR_MSG(NS_ERROR_GFX_PRINTER_DOC_IS_BUSY)
+      NS_ERROR_TO_LOCALIZED_PRINT_ERROR_MSG(NS_ERROR_GFX_PRINTING_NOT_IMPLEMENTED)
+      NS_ERROR_TO_LOCALIZED_PRINT_ERROR_MSG(NS_ERROR_GFX_COULD_NOT_LOAD_PRINT_MODULE)
 
     default:
       NS_ERROR_TO_LOCALIZED_PRINT_ERROR_MSG(NS_ERROR_FAILURE)
@@ -2290,8 +2297,10 @@ nsPrintEngine::ShowPrintErrorDialog(nsresult aPrintError, PRBool aIsPrinting)
     myStringBundle->GetStringFromName(NS_LITERAL_STRING("printpreview_error_dialog_title").get(), getter_Copies(title));
   }
 
-  if (!msg)
+  if (!msg) {
+    PR_PL(("ShowPrintErrorDialog(): msg==nsnull\n"));
     return;
+  }
 
   nsCOMPtr<nsIWindowWatcher> wwatch = do_GetService(NS_WINDOWWATCHER_CONTRACTID, &rv);
   if (NS_FAILED(rv))

gfx/public/nsIDeviceContext.h

@@ -150,7 +150,16 @@ typedef void * nsNativeDeviceContext;
 /* requested plex mode not supported by printer */
 #define NS_ERROR_GFX_PRINTER_PLEX_NOT_SUPPORTED \
   NS_ERROR_GENERATE_FAILURE(NS_ERROR_MODULE_GFX,NS_ERROR_GFX_PRINTER_BASE+31)
-  
+/* The document is still being loaded */
+#define NS_ERROR_GFX_PRINTER_DOC_IS_BUSY \
+  NS_ERROR_GENERATE_FAILURE(NS_ERROR_MODULE_GFX,NS_ERROR_GFX_PRINTER_BASE+32)
+/* Printing is not implemented */
+#define NS_ERROR_GFX_PRINTING_NOT_IMPLEMENTED \
+  NS_ERROR_GENERATE_FAILURE(NS_ERROR_MODULE_GFX,NS_ERROR_GFX_PRINTER_BASE+33)
+/* Cannot load the matching print module */
+#define NS_ERROR_GFX_COULD_NOT_LOAD_PRINT_MODULE \
+  NS_ERROR_GENERATE_FAILURE(NS_ERROR_MODULE_GFX,NS_ERROR_GFX_PRINTER_BASE+34)   
+      
 /**
  * Conts need for Print Preview
  */

gfx/src/gtk/nsDeviceContextGTK.cpp

@@ -536,7 +536,7 @@ NS_IMETHODIMP nsDeviceContextGTK::GetDeviceContextFor(nsIDeviceContextSpec *aDev
     nsCOMPtr<nsIDeviceContextXp> dcxp(do_CreateInstance(kCDeviceContextXp, &rv));
     NS_ASSERTION(NS_SUCCEEDED(rv), "Couldn't create Xp Device context.");    
     if (NS_FAILED(rv)) 
-      return rv;
+      return NS_ERROR_GFX_COULD_NOT_LOAD_PRINT_MODULE;
     
     rv = dcxp->SetSpec(aDevice);
     if (NS_FAILED(rv)) 
@@ -562,7 +562,7 @@ NS_IMETHODIMP nsDeviceContextGTK::GetDeviceContextFor(nsIDeviceContextSpec *aDev
     nsCOMPtr<nsIDeviceContextPS> dcps(do_CreateInstance(kCDeviceContextPS, &rv));
     NS_ASSERTION(NS_SUCCEEDED(rv), "Couldn't create PS Device context.");
     if (NS_FAILED(rv)) 
-      return rv;
+      return NS_ERROR_GFX_COULD_NOT_LOAD_PRINT_MODULE;
   
     rv = dcps->SetSpec(aDevice);
     if (NS_FAILED(rv)) 

gfx/src/xlib/nsDeviceContextXlib.cpp

@@ -442,7 +442,7 @@ NS_IMETHODIMP nsDeviceContextXlib::GetDeviceContextFor(nsIDeviceContextSpec *aDe
     nsCOMPtr<nsIDeviceContextXp> dcxp(do_CreateInstance(kCDeviceContextXp, &rv));
     NS_ASSERTION(NS_SUCCEEDED(rv), "Couldn't create Xp Device context.");    
     if (NS_FAILED(rv)) 
-      return rv;
+      return NS_ERROR_GFX_COULD_NOT_LOAD_PRINT_MODULE;
     
     rv = dcxp->SetSpec(aDevice);
     if (NS_FAILED(rv)) 
@@ -468,7 +468,7 @@ NS_IMETHODIMP nsDeviceContextXlib::GetDeviceContextFor(nsIDeviceContextSpec *aDe
     nsCOMPtr<nsIDeviceContextPS> dcps(do_CreateInstance(kCDeviceContextPS, &rv));
     NS_ASSERTION(NS_SUCCEEDED(rv), "Couldn't create PS Device context.");
     if (NS_FAILED(rv)) 
-      return rv;
+      return NS_ERROR_GFX_COULD_NOT_LOAD_PRINT_MODULE;
   
     rv = dcps->SetSpec(aDevice);
     if (NS_FAILED(rv)) 

layout/base/nsDocumentViewer.cpp

@@ -3069,7 +3069,8 @@ DocumentViewerImpl::Print(nsIPrintSettings*       aPrintSettings,
       mCachedPrintWebProgressListner = aWebProgressListener;
       mPrintIsPending                = PR_TRUE;
     }
-    return NS_OK;
+    PR_PL(("Printing Stopped - document is still busy!"));
+    return NS_ERROR_GFX_PRINTER_DOC_IS_BUSY;
   }
 
   nsCOMPtr<nsIPresShell> presShell;
@@ -3120,8 +3121,9 @@ DocumentViewerImpl::Print(nsIPrintSettings*       aPrintSettings,
   }
   return rv;
 #else
-  return NS_ERROR_FAILURE;
-#endif
+  PR_PL(("NS_PRINTING not defined - printing not implemented in this build!"));
+  return NS_ERROR_GFX_PRINTING_NOT_IMPLEMENTED;
+#endif /* NS_PRINTING */
 }
 
 /** ---------------------------------------------------

layout/html/base/src/printing.properties

@@ -85,8 +85,12 @@ NS_ERROR_GFX_PRINTER_DOC_IS_BUSY_PP=The browser cannot print preview right now.\
 NS_ERROR_GFX_PRINTER_DOC_WAS_DESTORYED=The page was replaced while you were trying to print.\nPlease try again.
 NS_ERROR_GFX_NO_PRINTDIALOG_IN_TOOLKIT=Either pluggable dialogs were not properly installed\nOr this GFX Toolkit no longer supports native Print Dialogs
 NS_ERROR_GFX_NO_PRINTROMPTSERVICE=The Printing Prompt Service is missing.
-NS_ERROR_GFX_PRINTER_XPRINT_NO_XPRINT_SERVERS_FOUND=There was a problem printing. No Xprint server(s) could be found.\nCheck whether the XPSERVERLIST environment variable contains any valid Xprint servers.
+NS_ERROR_GFX_PRINTER_XPRINT_NO_XPRINT_SERVERS_FOUND=There was a problem printing. No Xprint server(s) could be found.\nCheck whether the XPSERVERLIST environment variable contains any valid Xprint servers.\nFor further information see http://xprint.mozdev.org/ or http://www.mozilla.org/projects/xprint/
 NS_ERROR_GFX_PRINTER_PLEX_NOT_SUPPORTED=There was a problem printing because the plex mode you specified is not supported by your printer.
+NS_ERROR_GFX_PRINTER_DOC_IS_BUSY=The browser cannot print the document while it is being loaded.
+NS_ERROR_GFX_PRINTING_NOT_IMPLEMENTED=Printing is not implemented.
+NS_ERROR_GFX_COULD_NOT_LOAD_PRINT_MODULE=The requested print module cannot be loaded.
+
 # No printers available
 noprinter=No printers available.
 PrintToFile=Print To File

layout/printing/nsPrintEngine.cpp

@@ -2219,18 +2219,22 @@ void
 nsPrintEngine::ShowPrintErrorDialog(nsresult aPrintError, PRBool aIsPrinting)
 {
   nsresult rv;
+  
+  PR_PL(("nsPrintEngine::ShowPrintErrorDialog(nsresult aPrintError=%lx, PRBool aIsPrinting=%d)\n", (long)rv, (int)aIsPrinting));
 
   static NS_DEFINE_CID(kCStringBundleServiceCID,  NS_STRINGBUNDLESERVICE_CID);
   nsCOMPtr<nsIStringBundleService> stringBundleService = do_GetService(kCStringBundleServiceCID);
 
   if (!stringBundleService) {
-    NS_WARNING("ERROR: Failed to get StringBundle Service instance.\n");
+    PR_PL(("ShowPrintErrorDialog: Failed to get StringBundle Service instance.\n"));
     return;
   }
   nsCOMPtr<nsIStringBundle> myStringBundle;
   rv = stringBundleService->CreateBundle(NS_ERROR_GFX_PRINTER_BUNDLE_URL, getter_AddRefs(myStringBundle));
-  if (NS_FAILED(rv))
+  if (NS_FAILED(rv)) {
+    PR_PL(("ShowPrintErrorDialog(): CreateBundle() failure for NS_ERROR_GFX_PRINTER_BUNDLE_URL, rv=%lx\n", (long)rv));
     return;
+  }
 
   nsXPIDLString msg,
                 title;
@@ -2273,6 +2277,9 @@ nsPrintEngine::ShowPrintErrorDialog(nsresult aPrintError, PRBool aIsPrinting)
       NS_ERROR_TO_LOCALIZED_PRINT_ERROR_MSG(NS_ERROR_GFX_NO_PRINTROMPTSERVICE)
       NS_ERROR_TO_LOCALIZED_PRINT_ERROR_MSG(NS_ERROR_GFX_PRINTER_XPRINT_NO_XPRINT_SERVERS_FOUND)
       NS_ERROR_TO_LOCALIZED_PRINT_ERROR_MSG(NS_ERROR_GFX_PRINTER_PLEX_NOT_SUPPORTED)
+      NS_ERROR_TO_LOCALIZED_PRINT_ERROR_MSG(NS_ERROR_GFX_PRINTER_DOC_IS_BUSY)
+      NS_ERROR_TO_LOCALIZED_PRINT_ERROR_MSG(NS_ERROR_GFX_PRINTING_NOT_IMPLEMENTED)
+      NS_ERROR_TO_LOCALIZED_PRINT_ERROR_MSG(NS_ERROR_GFX_COULD_NOT_LOAD_PRINT_MODULE)
 
     default:
       NS_ERROR_TO_LOCALIZED_PRINT_ERROR_MSG(NS_ERROR_FAILURE)
@@ -2290,8 +2297,10 @@ nsPrintEngine::ShowPrintErrorDialog(nsresult aPrintError, PRBool aIsPrinting)
     myStringBundle->GetStringFromName(NS_LITERAL_STRING("printpreview_error_dialog_title").get(), getter_Copies(title));
   }
 
-  if (!msg)
+  if (!msg) {
+    PR_PL(("ShowPrintErrorDialog(): msg==nsnull\n"));
     return;
+  }
 
   nsCOMPtr<nsIWindowWatcher> wwatch = do_GetService(NS_WINDOWWATCHER_CONTRACTID, &rv);
   if (NS_FAILED(rv))