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  ScopedJavaLocalRef<jobject> java_byte_buffer(
24      env,
25      env->NewDirectByteBuffer(const_cast<char*>(text.data()), text.length()));
26  base::android::ScopedJavaLocalRef<jstring> java_charset =
27      base::android::ConvertUTF8ToJavaString(env, base::StringPiece(charset));
28  ScopedJavaLocalRef<jstring> java_result =
29      android::Java_NetStringUtil_convertToUnicode(env, java_byte_buffer.obj(),
30                                                   java_charset.obj());
31  return java_result;
32}
33
34// Attempts to convert |text| encoded in |charset| to a jstring (Java unicode
35// string) and then normalizes the string.  Returns the result jstring, or NULL
36// on failure.
37ScopedJavaLocalRef<jstring> ConvertToNormalizedJstring(
38    const std::string& text, const char* charset) {
39  JNIEnv* env = base::android::AttachCurrentThread();
40  ScopedJavaLocalRef<jobject> java_byte_buffer(
41      env,
42      env->NewDirectByteBuffer(const_cast<char*>(text.data()), text.length()));
43  base::android::ScopedJavaLocalRef<jstring> java_charset =
44      base::android::ConvertUTF8ToJavaString(env, base::StringPiece(charset));
45  ScopedJavaLocalRef<jstring> java_result =
46      android::Java_NetStringUtil_convertToUnicodeAndNormalize(
47          env, java_byte_buffer.obj(), java_charset.obj());
48  return java_result;
49}
50
51// Converts |text| encoded in |charset| to a jstring (Java unicode string).
52// Any characters that can not be converted are replaced with U+FFFD.
53ScopedJavaLocalRef<jstring> ConvertToJstringWithSubstitutions(
54    const std::string& text, const char* charset) {
55  JNIEnv* env = base::android::AttachCurrentThread();
56  ScopedJavaLocalRef<jobject> java_byte_buffer(
57      env,
58      env->NewDirectByteBuffer(const_cast<char*>(text.data()), text.length()));
59  base::android::ScopedJavaLocalRef<jstring> java_charset =
60      base::android::ConvertUTF8ToJavaString(env, base::StringPiece(charset));
61  ScopedJavaLocalRef<jstring> java_result =
62      android::Java_NetStringUtil_convertToUnicodeWithSubstitutions(
63          env, java_byte_buffer.obj(), java_charset.obj());
64  return java_result;
65}
66
67}  // namespace
68
69const char* const kCharsetLatin1 = "ISO-8859-1";
70
71bool ConvertToUtf8(const std::string& text, const char* charset,
72                   std::string* output) {
73  output->clear();
74  ScopedJavaLocalRef<jstring> java_result = ConvertToJstring(text, charset);
75  if (java_result.is_null())
76    return false;
77  *output = base::android::ConvertJavaStringToUTF8(java_result);
78  return true;
79}
80
81bool ConvertToUtf8AndNormalize(const std::string& text, const char* charset,
82                               std::string* output) {
83  output->clear();
84  ScopedJavaLocalRef<jstring> java_result = ConvertToNormalizedJstring(
85      text, charset);
86  if (java_result.is_null())
87    return false;
88  *output = base::android::ConvertJavaStringToUTF8(java_result);
89  return true;
90}
91
92bool ConvertToUTF16(const std::string& text, const char* charset,
93                    base::string16* output) {
94  output->clear();
95  ScopedJavaLocalRef<jstring> java_result = ConvertToJstring(text, charset);
96  if (java_result.is_null())
97    return false;
98  *output = base::android::ConvertJavaStringToUTF16(java_result);
99  return true;
100}
101
102bool ConvertToUTF16WithSubstitutions(const std::string& text,
103                                     const char* charset,
104                                     base::string16* output) {
105  output->clear();
106  ScopedJavaLocalRef<jstring> java_result =
107     ConvertToJstringWithSubstitutions(text, charset);
108  if (java_result.is_null())
109    return false;
110  *output = base::android::ConvertJavaStringToUTF16(java_result);
111  return true;
112}
113
114bool RegisterNetStringUtils(JNIEnv* env) {
115  return android::RegisterNativesImpl(env);
116}
117
118}  // namespace net
119