net_string_util_icu_alternatives_android.cc revision cedac228d2dd51db4b79ea1e72c7f249408ee061 
1// Copyright 2014 The Chromium Authors. All rights reserved.
2// Use of this source code is governed by a BSD-style license that can be
3// found in the LICENSE file.
4
5#include "net/base/net_string_util_icu_alternatives_android.h"
6
7#include "base/android/jni_android.h"
8#include "base/android/jni_string.h"
9#include "base/strings/string16.h"
10#include "base/strings/string_piece.h"
11#include "jni/NetStringUtil_jni.h"
12#include "net/base/net_string_util.h"
13
14namespace net {
15
16namespace {
17
18// Attempts to convert |text| encoded in |charset| to a jstring (Java unicode
19// string).  Returns the result jstring, or NULL on failure.
20ScopedJavaLocalRef<jstring> ConvertToJstring(const std::string& text,
21                                             const char* charset) {
22  JNIEnv* env = base::android::AttachCurrentThread();
23  jobject java_byte_buffer =
24      env->NewDirectByteBuffer(const_cast<char*>(text.data()), text.length());
25  base::android::ScopedJavaLocalRef<jstring> java_charset =
26      base::android::ConvertUTF8ToJavaString(env, base::StringPiece(charset));
27  ScopedJavaLocalRef<jstring> java_result =
28      android::Java_NetStringUtil_convertToUnicode(env, java_byte_buffer,
29                                                   java_charset.obj());
30  return java_result;
31}
32
33// Attempts to convert |text| encoded in |charset| to a jstring (Java unicode
34// string) and then normalizes the string.  Returns the result jstring, or NULL
35// on failure.
36ScopedJavaLocalRef<jstring> ConvertToNormalizedJstring(
37    const std::string& text, const char* charset) {
38  JNIEnv* env = base::android::AttachCurrentThread();
39  jobject java_byte_buffer =
40      env->NewDirectByteBuffer(const_cast<char*>(text.data()), text.length());
41  base::android::ScopedJavaLocalRef<jstring> java_charset =
42      base::android::ConvertUTF8ToJavaString(env, base::StringPiece(charset));
43  ScopedJavaLocalRef<jstring> java_result =
44      android::Java_NetStringUtil_convertToUnicodeAndNormalize(
45          env, java_byte_buffer, java_charset.obj());
46  return java_result;
47}
48
49// Converts |text| encoded in |charset| to a jstring (Java unicode string).
50// Any characters that can not be converted are replaced with U+FFFD.
51ScopedJavaLocalRef<jstring> ConvertToJstringWithSubstitutions(
52    const std::string& text, const char* charset) {
53  JNIEnv* env = base::android::AttachCurrentThread();
54  jobject java_byte_buffer =
55      env->NewDirectByteBuffer(const_cast<char*>(text.data()), text.length());
56  base::android::ScopedJavaLocalRef<jstring> java_charset =
57      base::android::ConvertUTF8ToJavaString(env, base::StringPiece(charset));
58  ScopedJavaLocalRef<jstring> java_result =
59      android::Java_NetStringUtil_convertToUnicodeWithSubstitutions(
60          env, java_byte_buffer, java_charset.obj());
61  return java_result;
62}
63
64}  // namespace
65
66const char* const kCharsetLatin1 = "ISO-8859-1";
67
68bool ConvertToUtf8(const std::string& text, const char* charset,
69                   std::string* output) {
70  output->clear();
71  ScopedJavaLocalRef<jstring> java_result = ConvertToJstring(text, charset);
72  if (java_result.is_null())
73    return false;
74  *output = base::android::ConvertJavaStringToUTF8(java_result);
75  return true;
76}
77
78bool ConvertToUtf8AndNormalize(const std::string& text, const char* charset,
79                               std::string* output) {
80  output->clear();
81  ScopedJavaLocalRef<jstring> java_result = ConvertToNormalizedJstring(
82      text, charset);
83  if (java_result.is_null())
84    return false;
85  *output = base::android::ConvertJavaStringToUTF8(java_result);
86  return true;
87}
88
89bool ConvertToUTF16(const std::string& text, const char* charset,
90                    base::string16* output) {
91  output->clear();
92  ScopedJavaLocalRef<jstring> java_result = ConvertToJstring(text, charset);
93  if (java_result.is_null())
94    return false;
95  *output = base::android::ConvertJavaStringToUTF16(java_result);
96  return true;
97}
98
99bool ConvertToUTF16WithSubstitutions(const std::string& text,
100                                     const char* charset,
101                                     base::string16* output) {
102  output->clear();
103  ScopedJavaLocalRef<jstring> java_result =
104     ConvertToJstringWithSubstitutions(text, charset);
105  if (java_result.is_null())
106    return false;
107  *output = base::android::ConvertJavaStringToUTF16(java_result);
108  return true;
109}
110
111bool RegisterNetStringUtils(JNIEnv* env) {
112  return android::RegisterNativesImpl(env);
113}
114
115}  // namespace net
116