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[videolink.git] / null_prompt_service.cpp

diff --git a/null_prompt_service.cpp b/null_prompt_service.cpp
index c1d24be55a6ef3da5880c49ad6f7e1e14c6a9ca3..878f7ff268f71057127e1f997287ad0b024d0077 100644 (file)
--- a/null_prompt_service.cpp
+++ b/null_prompt_service.cpp
@@ -1,11 +1,19 @@
-// Copyright 2006 Ben Hutchings <ben@decadentplace.org.uk>.
+// Copyright 2006 Ben Hutchings <ben@decadent.org.uk>.
 // See the file "COPYING" for licence details.
 
+#include <string>
+
+#include <langinfo.h>
+
 #include <nsCOMPtr.h>
+#include <nsICharsetConverterManager.h>
 #include <nsIComponentManager.h>
 #include <nsIFactory.h>
+#include <nsIServiceManagerUtils.h>
+#include <nsIUnicodeEncoder.h>
 
 #include "null_prompt_service.hpp"
+#include "webdvd.hpp"
 #include "xpcom_support.hpp"
 
 using xpcom_support::check;
@@ -43,20 +51,67 @@ namespace
     {
        return NS_ERROR_NOT_IMPLEMENTED;
     }
+
+    std::string native_error_string(const PRUnichar * text)
+    {
+       std::string result;
+       PRInt32 text_len = 0;
+       while (text[text_len])
+           ++text_len;
+
+       nsCOMPtr<nsICharsetConverterManager> conv_manager;
+       nsCOMPtr<nsIUnicodeEncoder> encoder;
+       static const nsCID charset_converter_manager_cid =
+           NS_ICHARSETCONVERTERMANAGER_CID;
+       if (NS_SUCCEEDED(CallGetService<nsICharsetConverterManager>(
+                            charset_converter_manager_cid,
+                            getter_AddRefs(conv_manager)))
+           && NS_SUCCEEDED(conv_manager->GetUnicodeEncoder(
+                               nl_langinfo(CODESET),
+                               getter_AddRefs(encoder))))
+       {
+           encoder->SetOutputErrorBehavior(
+               nsIUnicodeEncoder::kOnError_Replace, NULL, PRUnichar('?'));
+
+           char buf[1000];  // Hopefully long enough for an error message
+
+           char * out = buf;
+           PRInt32 out_len = sizeof(buf);
+           encoder->Convert(text, &text_len, out, &out_len);
+           out += out_len;
+
+           out_len = sizeof(buf) - out_len;
+           encoder->Finish(out, &out_len);
+           out += out_len;
+
+           result.assign(buf, out);
+       }
+       else
+       {
+           // Convert to ASCII
+           result.resize(text_len);
+           for (PRInt32 i = 0; i != text_len; ++i)
+               result[i] = (text[i] < 0x80) ? text[i] : '?';
+       }
+
+       return result;
+    }
 }
 
 NS_IMPL_ISUPPORTS1(null_prompt_service, nsIPromptService)
 
 NS_IMETHODIMP null_prompt_service::Alert(
-    nsIDOMWindow *, const PRUnichar *, const PRUnichar *)
+    nsIDOMWindow *, const PRUnichar *, const PRUnichar * text)
 {
+    fatal_error(native_error_string(text));
     return NS_OK;
 }
 
 NS_IMETHODIMP null_prompt_service::AlertCheck(
-    nsIDOMWindow *, const PRUnichar *, const PRUnichar *, const PRUnichar *,
-    PRBool *)
+    nsIDOMWindow *, const PRUnichar *, const PRUnichar * text,
+    const PRUnichar *, PRBool *)
 {
+    fatal_error(native_error_string(text));
     return NS_OK;
 }