Add JSON parsing support (issue #1188).

libcef/common/json_impl.cc

@@ -0,0 +1,78 @@
+// Copyright (c) 2015 The Chromium Embedded Framework 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 "include/cef_parser.h"
+#include "libcef/common/values_impl.h"
+
+#include "base/values.h"
+#include "base/json/json_reader.h"
+#include "base/json/json_writer.h"
+
+namespace {
+
+int GetJSONReaderOptions(cef_json_parser_options_t options) {
+  int op = base::JSON_PARSE_RFC;
+  if (options & JSON_PARSER_ALLOW_TRAILING_COMMAS)
+    op |= base::JSON_ALLOW_TRAILING_COMMAS;
+  return op;
+}
+
+int GetJSONWriterOptions(cef_json_writer_options_t options) {
+  int op = 0;
+  if (op & JSON_WRITER_OMIT_BINARY_VALUES)
+    op |= base::JSONWriter::OPTIONS_OMIT_BINARY_VALUES;
+  if (op & JSON_WRITER_OMIT_DOUBLE_TYPE_PRESERVATION)
+    op |= base::JSONWriter::OPTIONS_OMIT_DOUBLE_TYPE_PRESERVATION;
+  if (op & JSON_WRITER_PRETTY_PRINT)
+    op |= base::JSONWriter::OPTIONS_PRETTY_PRINT;
+  return op;
+}
+
+}  // namespace
+
+CefRefPtr<CefValue> CefParseJSON(const CefString& json_string,
+                                 cef_json_parser_options_t options) {
+  const std::string& json = json_string.ToString();
+  base::Value* parse_result =
+      base::JSONReader::Read(json, GetJSONReaderOptions(options));
+  if (parse_result)
+    return new CefValueImpl(parse_result);
+  return NULL;
+}
+
+CefRefPtr<CefValue> CefParseJSONAndReturnError(
+    const CefString& json_string,
+    cef_json_parser_options_t options,
+    cef_json_parser_error_t& error_code_out,
+    CefString& error_msg_out) {
+  const std::string& json = json_string.ToString();
+
+  int error_code;
+  std::string error_msg;
+  base::Value* parse_result = base::JSONReader::ReadAndReturnError(
+      json, GetJSONReaderOptions(options), &error_code, &error_msg);
+  if (parse_result)
+    return new CefValueImpl(parse_result);
+
+  error_code_out = static_cast<cef_json_parser_error_t>(error_code);
+  error_msg_out = error_msg;
+  return NULL;
+}
+
+CefString CefWriteJSON(CefRefPtr<CefValue> node,
+                       cef_json_writer_options_t options) {
+  if (!node.get() || !node->IsValid())
+    return CefString();
+
+  CefValueImpl* impl = static_cast<CefValueImpl*>(node.get());
+  CefValueImpl::ScopedLockedValue scoped_value(impl);
+
+  std::string json_string;
+  if (base::JSONWriter::WriteWithOptions(scoped_value.value(),
+                                         GetJSONWriterOptions(options),
+                                         &json_string)) {
+    return json_string;
+  }
+  return CefString();
+}