Issue #1258 - Part 1: Import mailnews, ldap, and mork from comm-esr52.9.1

mailnews/intl/nsCharsetConverterManager.cpp

@@ -0,0 +1,356 @@
+/* -*- 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 "nsCOMPtr.h"
+#include "nsString.h"
+#include "nsUnicharUtils.h"
+#include "nsCharsetAlias.h"
+#include "nsICategoryManager.h"
+#include "nsICharsetConverterManager.h"
+#include "nsEncoderDecoderUtils.h"
+#include "nsIStringBundle.h"
+#include "nsTArray.h"
+#include "nsStringEnumerator.h"
+#include "mozilla/Services.h"
+
+#include "nsComponentManagerUtils.h"
+#include "nsISupportsPrimitives.h"
+#include "nsServiceManagerUtils.h"
+
+// just for CONTRACTIDs
+#include "nsCharsetConverterManager.h"
+
+static nsIStringBundle * sDataBundle;
+static nsIStringBundle * sTitleBundle;
+
+// Class nsCharsetConverterManager [implementation]
+
+NS_IMPL_ISUPPORTS(nsCharsetConverterManager, nsICharsetConverterManager)
+
+nsCharsetConverterManager::nsCharsetConverterManager() 
+{
+}
+
+nsCharsetConverterManager::~nsCharsetConverterManager() 
+{
+}
+
+//static
+void nsCharsetConverterManager::Shutdown()
+{
+  NS_IF_RELEASE(sDataBundle);
+  NS_IF_RELEASE(sTitleBundle);
+}
+
+static
+nsresult LoadExtensibleBundle(const char* aCategory, 
+                              nsIStringBundle ** aResult)
+{
+  nsCOMPtr<nsIStringBundleService> sbServ =
+    mozilla::services::GetStringBundleService();
+  if (!sbServ)
+    return NS_ERROR_FAILURE;
+
+  return sbServ->CreateExtensibleBundle(aCategory, aResult);
+}
+
+static
+nsresult GetBundleValue(nsIStringBundle * aBundle, 
+                        const char * aName, 
+                        const nsAFlatString& aProp, 
+                        char16_t ** aResult)
+{
+  nsAutoString key; 
+
+  key.AssignWithConversion(aName);
+  ToLowerCase(key); // we lowercase the main comparison key
+  key.Append(aProp);
+
+  return aBundle->GetStringFromName(key.get(), aResult);
+}
+
+static
+nsresult GetBundleValue(nsIStringBundle * aBundle, 
+                        const char * aName, 
+                        const nsAFlatString& aProp, 
+                        nsAString& aResult)
+{
+  nsresult rv = NS_OK;
+
+  nsXPIDLString value;
+  rv = GetBundleValue(aBundle, aName, aProp, getter_Copies(value));
+  if (NS_FAILED(rv))
+    return rv;
+
+  aResult = value;
+
+  return NS_OK;
+}
+
+static
+nsresult GetCharsetDataImpl(const char * aCharset, const char16_t * aProp,
+                            nsAString& aResult)
+{
+  NS_ENSURE_ARG_POINTER(aCharset);
+  // aProp can be nullptr
+
+  if (!sDataBundle) {
+    nsresult rv = LoadExtensibleBundle(NS_DATA_BUNDLE_CATEGORY, &sDataBundle);
+    if (NS_FAILED(rv))
+      return rv;
+  }
+
+  return GetBundleValue(sDataBundle, aCharset, nsDependentString(aProp), aResult);
+}
+
+//static
+bool nsCharsetConverterManager::IsInternal(const nsACString& aCharset)
+{
+  nsAutoString str;
+  // fully qualify to possibly avoid vtable call
+  nsresult rv = GetCharsetDataImpl(PromiseFlatCString(aCharset).get(),
+                                   u".isInternal",
+                                   str);
+
+  return NS_SUCCEEDED(rv);
+}
+
+
+//----------------------------------------------------------------------------//----------------------------------------------------------------------------
+// Interface nsICharsetConverterManager [implementation]
+
+NS_IMETHODIMP
+nsCharsetConverterManager::GetUnicodeEncoder(const char * aDest, 
+                                             nsIUnicodeEncoder ** aResult)
+{
+  // resolve the charset first
+  nsAutoCString charset;
+  
+  // fully qualify to possibly avoid vtable call
+  nsCharsetConverterManager::GetCharsetAlias(aDest, charset);
+
+  return nsCharsetConverterManager::GetUnicodeEncoderRaw(charset.get(),
+                                                         aResult);
+}
+
+
+NS_IMETHODIMP
+nsCharsetConverterManager::GetUnicodeEncoderRaw(const char * aDest, 
+                                                nsIUnicodeEncoder ** aResult)
+{
+  *aResult= nullptr;
+  nsCOMPtr<nsIUnicodeEncoder> encoder;
+
+  nsresult rv = NS_OK;
+
+  nsAutoCString
+    contractid(NS_LITERAL_CSTRING(NS_UNICODEENCODER_CONTRACTID_BASE) +
+               nsDependentCString(aDest));
+
+  // Always create an instance since encoders hold state.
+  encoder = do_CreateInstance(contractid.get(), &rv);
+
+  if (NS_FAILED(rv))
+    rv = NS_ERROR_UCONV_NOCONV;
+  else
+  {
+    *aResult = encoder.get();
+    NS_ADDREF(*aResult);
+  }
+  return rv;
+}
+
+NS_IMETHODIMP
+nsCharsetConverterManager::GetUnicodeDecoder(const char * aSrc, 
+                                             nsIUnicodeDecoder ** aResult)
+{
+  // resolve the charset first
+  nsAutoCString charset;
+
+  // fully qualify to possibly avoid vtable call
+  if (NS_FAILED(nsCharsetConverterManager::GetCharsetAlias(aSrc, charset)))
+    return NS_ERROR_UCONV_NOCONV;
+
+  return nsCharsetConverterManager::GetUnicodeDecoderRaw(charset.get(),
+                                                         aResult);
+}
+
+NS_IMETHODIMP
+nsCharsetConverterManager::GetUnicodeDecoderInternal(const char * aSrc, 
+                                                     nsIUnicodeDecoder ** aResult)
+{
+  // resolve the charset first
+  nsAutoCString charset;
+
+  nsresult rv = nsCharsetAlias::GetPreferredInternal(nsDependentCString(aSrc),
+                                                     charset);
+  NS_ENSURE_SUCCESS(rv, rv);
+
+  return nsCharsetConverterManager::GetUnicodeDecoderRaw(charset.get(),
+                                                         aResult);
+}
+
+NS_IMETHODIMP
+nsCharsetConverterManager::GetUnicodeDecoderRaw(const char * aSrc, 
+                                                nsIUnicodeDecoder ** aResult)
+{
+  *aResult= nullptr;
+  nsCOMPtr<nsIUnicodeDecoder> decoder;
+
+  nsresult rv = NS_OK;
+
+  NS_NAMED_LITERAL_CSTRING(contractbase, NS_UNICODEDECODER_CONTRACTID_BASE);
+  nsDependentCString src(aSrc);
+
+  decoder = do_CreateInstance(PromiseFlatCString(contractbase + src).get(),
+                              &rv);
+  NS_ENSURE_SUCCESS(rv, NS_ERROR_UCONV_NOCONV);
+
+  decoder.forget(aResult);
+  return rv;
+}
+
+static
+nsresult GetList(const nsACString& aCategory,
+                 const nsACString& aPrefix,
+                 nsIUTF8StringEnumerator** aResult)
+{
+  NS_ENSURE_ARG_POINTER(aResult);
+  *aResult = nullptr;
+
+  nsresult rv;
+
+  nsCOMPtr<nsICategoryManager> catman = do_GetService(NS_CATEGORYMANAGER_CONTRACTID, &rv);
+  if (NS_FAILED(rv))
+    return rv;
+
+  nsTArray<nsCString>* array = new nsTArray<nsCString>;
+  if (!array)
+    return NS_ERROR_OUT_OF_MEMORY;
+  
+  nsCOMPtr<nsISimpleEnumerator> enumerator;
+  catman->EnumerateCategory(PromiseFlatCString(aCategory).get(), 
+                            getter_AddRefs(enumerator));
+
+  bool hasMore;
+  while (NS_SUCCEEDED(enumerator->HasMoreElements(&hasMore)) && hasMore) {
+    nsCOMPtr<nsISupports> supports;
+    if (NS_FAILED(enumerator->GetNext(getter_AddRefs(supports))))
+      continue;
+    
+    nsCOMPtr<nsISupportsCString> supStr = do_QueryInterface(supports);
+    if (!supStr)
+      continue;
+
+    nsAutoCString name;
+    if (NS_FAILED(supStr->GetData(name)))
+      continue;
+
+    nsAutoCString fullName(aPrefix);
+    fullName.Append(name);
+    NS_ENSURE_TRUE(array->AppendElement(fullName), NS_ERROR_OUT_OF_MEMORY);
+  }
+    
+  return NS_NewAdoptingUTF8StringEnumerator(aResult, array);
+}
+
+// we should change the interface so that we can just pass back a enumerator!
+NS_IMETHODIMP
+nsCharsetConverterManager::GetDecoderList(nsIUTF8StringEnumerator ** aResult)
+{
+  return GetList(NS_LITERAL_CSTRING(NS_UNICODEDECODER_NAME),
+                 EmptyCString(), aResult);
+}
+
+NS_IMETHODIMP
+nsCharsetConverterManager::GetEncoderList(nsIUTF8StringEnumerator ** aResult)
+{
+  return GetList(NS_LITERAL_CSTRING(NS_UNICODEENCODER_NAME),
+                 EmptyCString(), aResult);
+}
+
+NS_IMETHODIMP
+nsCharsetConverterManager::GetCharsetDetectorList(nsIUTF8StringEnumerator** aResult)
+{
+  return GetList(NS_LITERAL_CSTRING("charset-detectors"),
+                 NS_LITERAL_CSTRING("chardet."), aResult);
+}
+
+// XXX Improve the implementation of this method. Right now, it is build on 
+// top of the nsCharsetAlias service. We can make the nsCharsetAlias
+// better, with its own hash table (not the StringBundle anymore) and
+// a nicer file format.
+NS_IMETHODIMP
+nsCharsetConverterManager::GetCharsetAlias(const char * aCharset, 
+                                           nsACString& aResult)
+{
+  NS_ENSURE_ARG_POINTER(aCharset);
+
+  // We try to obtain the preferred name for this charset from the charset 
+  // aliases.
+  nsresult rv;
+
+  rv = nsCharsetAlias::GetPreferred(nsDependentCString(aCharset), aResult);
+  NS_ENSURE_SUCCESS(rv, rv);
+
+  return NS_OK;
+}
+
+
+NS_IMETHODIMP
+nsCharsetConverterManager::GetCharsetTitle(const char * aCharset, 
+                                           nsAString& aResult)
+{
+  NS_ENSURE_ARG_POINTER(aCharset);
+
+  if (!sTitleBundle) {
+    nsresult rv = LoadExtensibleBundle(NS_TITLE_BUNDLE_CATEGORY, &sTitleBundle);
+    NS_ENSURE_SUCCESS(rv, rv);
+  }
+
+  return GetBundleValue(sTitleBundle, aCharset, NS_LITERAL_STRING(".title"), aResult);
+}
+
+NS_IMETHODIMP
+nsCharsetConverterManager::GetCharsetData(const char * aCharset, 
+                                          const char16_t * aProp,
+                                          nsAString& aResult)
+{
+  return GetCharsetDataImpl(aCharset, aProp, aResult);
+}
+
+NS_IMETHODIMP
+nsCharsetConverterManager::GetCharsetLangGroup(const char * aCharset, 
+                                               nsIAtom** aResult)
+{
+  // resolve the charset first
+  nsAutoCString charset;
+
+  nsresult rv = GetCharsetAlias(aCharset, charset);
+  NS_ENSURE_SUCCESS(rv, rv);
+
+  // fully qualify to possibly avoid vtable call
+  return nsCharsetConverterManager::GetCharsetLangGroupRaw(charset.get(),
+                                                           aResult);
+}
+
+NS_IMETHODIMP
+nsCharsetConverterManager::GetCharsetLangGroupRaw(const char * aCharset, 
+                                                  nsIAtom** aResult)
+{
+
+  *aResult = nullptr;
+  nsAutoString langGroup;
+  // fully qualify to possibly avoid vtable call
+  nsresult rv = nsCharsetConverterManager::GetCharsetData(
+      aCharset, u".LangGroup", langGroup);
+
+  if (NS_SUCCEEDED(rv)) {
+    ToLowerCase(langGroup); // use lowercase for all language atoms
+    *aResult = NS_Atomize(langGroup).take();
+  }
+
+  return rv;
+}