Move page action manifest parsing out of Extension; the first multi-key manifest handler.

chrome/common/extensions/api/extension_action/page_action_handler.cc

+// Copyright (c) 2013 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 "chrome/common/extensions/api/extension_action/page_action_handler.h"
+
+#include "base/utf_string_conversions.h"
+#include "base/values.h"
+#include "chrome/common/extensions/extension.h"
+#include "chrome/common/extensions/extension_constants.h"
+#include "chrome/common/extensions/extension_manifest_constants.h"
+#include "chrome/common/extensions/manifest_handler_helpers.h"
+
+namespace keys = extension_manifest_keys;
+namespace errors = extension_manifest_errors;
+
+namespace extensions {
+
+PageActionHandler::PageActionHandler() {
+}
+
+PageActionHandler::~PageActionHandler() {
+}
+
+bool PageActionHandler::Parse(Extension* extension, string16* error) {
+  scoped_ptr<ActionInfo> page_action_info;
+  const DictionaryValue* page_action_value = NULL;
+
+  if (extension->manifest()->HasKey(keys::kPageActions)) {
+    const ListValue* list_value = NULL;
+    if (!extension->manifest()->GetList(keys::kPageActions, &list_value)) {
+      *error = ASCIIToUTF16(errors::kInvalidPageActionsList);
+      return false;
+    }
+
+    size_t list_value_length = list_value->GetSize();
+
+    if (list_value_length == 0u) {
+      // A list with zero items is allowed, and is equivalent to not having
+      // a page_actions key in the manifest.  Don't set |page_action_value|.
+    } else if (list_value_length == 1u) {
+      if (!list_value->GetDictionary(0, &page_action_value)) {
+        *error = ASCIIToUTF16(errors::kInvalidPageAction);
+        return false;
+      }
+    } else {  // list_value_length > 1u.
+      *error = ASCIIToUTF16(errors::kInvalidPageActionsListSize);
+      return false;
+    }
+  } else if (extension->manifest()->HasKey(keys::kPageAction)) {
+    if (!extension->manifest()->GetDictionary(keys::kPageAction,
+                                              &page_action_value)) {
+      *error = ASCIIToUTF16(errors::kInvalidPageAction);
+      return false;
+    }
+  }
+
+  // If page_action_value is not NULL, then there was a valid page action.
+  if (page_action_value) {
+    page_action_info = manifest_handler_helpers::LoadActionInfo(
+        extension, page_action_value, error);
+    if (!page_action_info)
+      return false;  // Failed to parse page action definition.
+  }
+  ActionInfo::SetPageActionInfo(extension, page_action_info.release());
+
+  return true;
+}
+
+}  // namespace extensions