1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
|
// Copyright (c) 2010 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "webkit/glue/plugins/pepper_char_set.h"
#include <stdlib.h>
#include "base/i18n/icu_string_conversions.h"
#include "third_party/ppapi/c/dev/ppb_char_set_dev.h"
#include "unicode/ucnv.h"
#include "unicode/ucnv_cb.h"
#include "unicode/ucnv_err.h"
#include "unicode/ustring.h"
#include "webkit/glue/plugins/pepper_plugin_delegate.h"
#include "webkit/glue/plugins/pepper_plugin_instance.h"
#include "webkit/glue/plugins/pepper_plugin_module.h"
#include "webkit/glue/plugins/pepper_var.h"
namespace pepper {
namespace {
// Converts the given PP error handling behavior to the version in base,
// placing the result in |*result| and returning true on success. Returns false
// if the enum is invalid.
bool PPToBaseConversionError(PP_CharSet_ConversionError on_error,
base::OnStringConversionError::Type* result) {
switch (on_error) {
case PP_CHARSET_CONVERSIONERROR_FAIL:
*result = base::OnStringConversionError::FAIL;
return true;
case PP_CHARSET_CONVERSIONERROR_SKIP:
*result = base::OnStringConversionError::SKIP;
return true;
case PP_CHARSET_CONVERSIONERROR_SUBSTITUTE:
*result = base::OnStringConversionError::SUBSTITUTE;
return true;
default:
return false;
}
}
// The "substitution" behavior of this function does not match the
// implementation in base, so we partially duplicate the code from
// icu_string_conversions.cc with the correct error handling setup required
// by this pepper interface.
char* UTF16ToCharSet(const uint16_t* utf16, uint32_t utf16_len,
const char* output_char_set,
PP_CharSet_ConversionError on_error,
uint32_t* output_length) {
*output_length = 0;
UErrorCode status = U_ZERO_ERROR;
UConverter* converter = ucnv_open(output_char_set, &status);
if (!U_SUCCESS(status))
return NULL;
int encoded_max_length = UCNV_GET_MAX_BYTES_FOR_STRING(utf16_len,
ucnv_getMaxCharSize(converter));
// Setup our error handler.
switch (on_error) {
case PP_CHARSET_CONVERSIONERROR_FAIL:
ucnv_setFromUCallBack(converter, UCNV_FROM_U_CALLBACK_STOP, 0,
NULL, NULL, &status);
break;
case PP_CHARSET_CONVERSIONERROR_SKIP:
ucnv_setFromUCallBack(converter, UCNV_FROM_U_CALLBACK_SKIP, 0,
NULL, NULL, &status);
break;
case PP_CHARSET_CONVERSIONERROR_SUBSTITUTE: {
// ICU sets the substitution char for some character sets (like latin1)
// to be the ASCII "substitution character" (26). We want to use '?'
// instead for backwards-compat with Windows behavior.
char subst_chars[32];
int8_t subst_chars_len = 32;
ucnv_getSubstChars(converter, subst_chars, &subst_chars_len, &status);
if (subst_chars_len == 1 && subst_chars[0] == 26) {
// Override to the question mark character if possible. When using
// setSubstString, the input is a Unicode character. The function will
// try to convert it to the destination character set and fail if that
// can not be converted to the destination character set.
//
// We just ignore any failure. If the dest char set has no
// representation for '?', then we'll just stick to the ICU default
// substitution character.
UErrorCode subst_status = U_ZERO_ERROR;
UChar question_mark = '?';
ucnv_setSubstString(converter, &question_mark, 1, &subst_status);
}
ucnv_setFromUCallBack(converter, UCNV_FROM_U_CALLBACK_SUBSTITUTE, 0,
NULL, NULL, &status);
break;
}
default:
return NULL;
}
// ucnv_fromUChars returns size not including terminating null.
char* encoded = static_cast<char*>(malloc(encoded_max_length + 1));
int actual_size = ucnv_fromUChars(converter, encoded,
encoded_max_length, reinterpret_cast<const UChar*>(utf16), utf16_len,
&status);
ucnv_close(converter);
if (!U_SUCCESS(status)) {
free(encoded);
return NULL;
}
encoded[actual_size] = 0;
*output_length = actual_size;
return encoded;
}
uint16_t* CharSetToUTF16(const char* input, uint32_t input_len,
const char* input_char_set,
PP_CharSet_ConversionError on_error,
uint32_t* output_length) {
*output_length = 0;
base::OnStringConversionError::Type base_on_error;
if (!PPToBaseConversionError(on_error, &base_on_error))
return NULL; // Invalid enum value.
// We can convert this call to the implementation in base to avoid code
// duplication, although this does introduce an extra copy of the data.
string16 output;
if (!base::CodepageToUTF16(std::string(input, input_len), input_char_set,
base_on_error, &output))
return NULL;
uint16_t* ret_buf = static_cast<uint16_t*>(
malloc((output.size() + 1) * sizeof(uint16_t)));
if (!ret_buf)
return NULL;
*output_length = static_cast<uint32_t>(output.size());
memcpy(ret_buf, output.c_str(), (output.size() + 1) * sizeof(uint16_t));
return ret_buf;
}
PP_Var GetDefaultCharSet(PP_Module pp_module) {
PluginModule* module = ResourceTracker::Get()->GetModule(pp_module);
if (!module)
return PP_MakeUndefined();
std::string encoding =
module->GetSomeInstance()->delegate()->GetDefaultEncoding();
return StringVar::StringToPPVar(module, encoding);
}
const PPB_CharSet_Dev ppb_charset = {
&UTF16ToCharSet,
&CharSetToUTF16,
&GetDefaultCharSet
};
} // namespace
// static
const struct PPB_CharSet_Dev* CharSet::GetInterface() {
return &ppb_charset;
}
} // namespace pepper
|
