extensions: Use V8 Maybe APIs in ModuleSystem
Replacing DEPRECATE_SOON APIs.
BUG=479065
Review URL: https://codereview.chromium.org/1185443004
Cr-Commit-Position: refs/heads/master@{#335181}
diff --git a/extensions/renderer/v8_helpers.h b/extensions/renderer/v8_helpers.h
new file mode 100644
index 0000000..385490f4
--- /dev/null
+++ b/extensions/renderer/v8_helpers.h
@@ -0,0 +1,106 @@
+// 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.
+
+#ifndef EXTENSIONS_RENDERER_V8_HELPERS_H_
+#define EXTENSIONS_RENDERER_V8_HELPERS_H_
+
+#include <string.h>
+
+#include "v8/include/v8.h"
+
+namespace extensions {
+namespace v8_helpers {
+
+// Helper functions for V8 APIs.
+
+// Converts |str| to a V8 string. Returns true on success.
+inline bool ToV8String(v8::Isolate* isolate,
+ const char* str,
+ v8::Local<v8::String>* out) {
+ return v8::String::NewFromUtf8(isolate, str, v8::NewStringType::kNormal)
+ .ToLocal(out);
+}
+
+// Converts |str| to a V8 string.
+// This crashes when strlen(str) > v8::String::kMaxLength.
+inline v8::Local<v8::String> ToV8StringUnsafe(
+ v8::Isolate* isolate,
+ const char* str,
+ v8::NewStringType string_type = v8::NewStringType::kNormal) {
+ DCHECK(strlen(str) <= v8::String::kMaxLength);
+ return v8::String::NewFromUtf8(isolate, str, string_type)
+ .ToLocalChecked();
+}
+
+// Returns true if |maybe| is both a value, and that value is true.
+inline bool IsTrue(v8::Maybe<bool> maybe) {
+ return maybe.IsJust() && maybe.FromJust();
+}
+
+// SetProperty() family wraps V8::Object::Set(). Returns true on success.
+inline bool SetProperty(v8::Local<v8::Context> context,
+ v8::Local<v8::Object> object,
+ v8::Local<v8::Value> key,
+ v8::Local<v8::Value> value) {
+ return IsTrue(object->Set(context, key, value));
+}
+
+inline bool SetProperty(v8::Local<v8::Context> context,
+ v8::Local<v8::Object> object,
+ uint32_t index,
+ v8::Local<v8::Value> value) {
+ return IsTrue(object->Set(context, index, value));
+}
+
+inline bool SetProperty(v8::Local<v8::Context> context,
+ v8::Local<v8::Object> object,
+ const char* key,
+ v8::Local<v8::Value> value) {
+ v8::Local<v8::String> v8_key;
+ if (!ToV8String(context->GetIsolate(), key, &v8_key))
+ return false;
+ return SetProperty(context, object, v8_key, value);
+}
+
+// GetProperty() family calls V8::Object::Get() and extracts a value from
+// returned MaybeLocal. Returns true on success.
+inline bool GetProperty(v8::Local<v8::Context> context,
+ v8::Local<v8::Object> object,
+ v8::Local<v8::Value> key,
+ v8::Local<v8::Value>* out) {
+ return object->Get(context, key).ToLocal(out);
+}
+
+inline bool GetProperty(v8::Local<v8::Context> context,
+ v8::Local<v8::Object> object,
+ const char* key,
+ v8::Local<v8::Value>* out) {
+ v8::Local<v8::String> v8_key;
+ if (!ToV8String(context->GetIsolate(), key, &v8_key))
+ return false;
+ return GetProperty(context, object, v8_key, out);
+}
+
+// GetPropertyUnsafe() family wraps v8::Object::Get(). They crash when an
+// exception is thrown.
+inline v8::Local<v8::Value> GetPropertyUnsafe(v8::Local<v8::Context> context,
+ v8::Local<v8::Object> object,
+ v8::Local<v8::Value> key) {
+ return object->Get(context, key).ToLocalChecked();
+}
+
+inline v8::Local<v8::Value> GetPropertyUnsafe(
+ v8::Local<v8::Context> context,
+ v8::Local<v8::Object> object,
+ const char* key,
+ v8::NewStringType string_type = v8::NewStringType::kNormal) {
+ return object->Get(context,
+ ToV8StringUnsafe(context->GetIsolate(), key, string_type))
+ .ToLocalChecked();
+}
+
+} // namespace v8_helpers
+} // namespace extensions
+
+#endif // EXTENSIONS_RENDERER_V8_HELPERS_H_
