cef/libcef/common/string_util.cc

74 lines
2.4 KiB
C++

// Copyright 2021 The Chromium Embedded Framework Authors. Portions copyright
// 2011 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 "cef/libcef/common/string_util.h"
#include "base/memory/read_only_shared_memory_region.h"
#include "base/memory/ref_counted_memory.h"
#include "third_party/blink/public/platform/web_string.h"
namespace string_util {
void GetCefString(const blink::WebString& source, CefString& cef_string) {
#if defined(CEF_STRING_TYPE_UTF8)
cef_string.FromString(source.Utf8());
#else
cef_string.FromString16(source.Utf16());
#endif
}
void GetCefString(scoped_refptr<base::RefCountedMemory> source,
CefString& cef_string) {
if (source && source->size() > 0U) {
#if defined(CEF_STRING_TYPE_UTF8) || defined(CEF_STRING_TYPE_UTF16)
// Reference existing UTF8 or UTF16 data.
cef_string.FromString(
reinterpret_cast<const CefString::char_type*>(source->data()),
source->size() / sizeof(CefString::char_type),
/*copy=*/false);
#else
// Must convert from UTF16.
cef_string.FromString16(
reinterpret_cast<const std::u16string::value_type*>(source->data()),
source->size() / sizeof(std::u16string::value_type));
#endif
} else {
cef_string.clear();
}
}
base::ReadOnlySharedMemoryRegion CreateSharedMemoryRegion(
const blink::WebString& source) {
base::ReadOnlySharedMemoryRegion region;
if (!source.IsEmpty()) {
#if defined(CEF_STRING_TYPE_UTF8)
const std::string& string = source.Utf8();
const size_t byte_size = string.length();
#else
const std::u16string& string = source.Utf16();
const size_t byte_size =
string.length() * sizeof(std::u16string::value_type);
#endif
auto mapped_region = base::ReadOnlySharedMemoryRegion::Create(byte_size);
if (mapped_region.IsValid()) {
memcpy(mapped_region.mapping.memory(), string.data(), byte_size);
region = std::move(mapped_region.region);
}
}
return region;
}
void ExecuteWithScopedCefString(base::ReadOnlySharedMemoryRegion region,
ScopedCefStringCallback callback) {
auto shared_buf =
base::RefCountedSharedMemoryMapping::CreateFromWholeRegion(region);
CefString str;
GetCefString(shared_buf, str);
std::move(callback).Run(str);
}
} // namespace string_util