mirror of
https://github.com/flutter/flutter.git
synced 2026-02-20 02:29:02 +08:00
65 lines
1.9 KiB
C++
65 lines
1.9 KiB
C++
// Copyright 2015 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 "sky/engine/tonic/dart_string.h"
|
|
|
|
#include "base/logging.h"
|
|
|
|
namespace blink {
|
|
namespace {
|
|
|
|
void FinalizeString(void* string_impl) {
|
|
DCHECK(string_impl);
|
|
reinterpret_cast<StringImpl*>(string_impl)->deref();
|
|
}
|
|
|
|
template <typename CharType>
|
|
String Externalize(Dart_Handle handle, intptr_t length) {
|
|
if (!length)
|
|
return StringImpl::empty();
|
|
CharType* buffer = nullptr;
|
|
RefPtr<StringImpl> string_impl =
|
|
StringImpl::createUninitialized(length, buffer);
|
|
|
|
string_impl->ref(); // Balanced in FinalizeString.
|
|
|
|
Dart_Handle result =
|
|
Dart_MakeExternalString(handle, buffer, length * sizeof(CharType),
|
|
string_impl.get(), FinalizeString);
|
|
DCHECK(!Dart_IsError(result));
|
|
return String(string_impl.release());
|
|
}
|
|
|
|
} // namespace
|
|
|
|
Dart_Handle CreateDartString(StringImpl* string_impl) {
|
|
if (!string_impl)
|
|
return Dart_EmptyString();
|
|
|
|
string_impl->ref(); // Balanced in FinalizeString.
|
|
|
|
if (string_impl->is8Bit()) {
|
|
return Dart_NewExternalLatin1String(string_impl->characters8(),
|
|
string_impl->length(), string_impl,
|
|
FinalizeString);
|
|
} else {
|
|
return Dart_NewExternalUTF16String(string_impl->characters16(),
|
|
string_impl->length(), string_impl,
|
|
FinalizeString);
|
|
}
|
|
}
|
|
|
|
String ExternalizeDartString(Dart_Handle handle) {
|
|
DCHECK(Dart_IsString(handle));
|
|
DCHECK(!Dart_IsExternalString(handle));
|
|
bool is_latin1 = Dart_IsStringLatin1(handle);
|
|
intptr_t length;
|
|
Dart_StringLength(handle, &length);
|
|
if (is_latin1)
|
|
return Externalize<LChar>(handle, length);
|
|
return Externalize<UChar>(handle, length);
|
|
}
|
|
|
|
} // namespace blink
|