Reuse context menu in StaticHTMLViewController

ios/web/web_state/ui/crw_context_menu_controller.h

+// Copyright 2017 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 IOS_WEB_WEB_STATE_UI_CRW_CONTEXT_MENU_CONTROLLER_H_
+#define IOS_WEB_WEB_STATE_UI_CRW_CONTEXT_MENU_CONTROLLER_H_
+
+#import <Foundation/Foundation.h>
+#import <Webkit/Webkit.h>
+
+#import "ios/web/public/block_types.h"
+
+@protocol CRWContextMenuDelegate;
+@protocol CRWJSInjectionEvaluator;
+
+// A controller that will recognise context menu gesture on |webView|. This
+// controller will rely on a long press gesture recognizer and JavaScript to
+// determine the element on which context menu is triggered.
+// The trigger delay is slightly shorter that ths system's one.
+@interface CRWContextMenuController : NSObject
+
+// Installs the |CRWContextMenuController| on |webView|.
+// - |webView| cannot be nil. |webView| is not retained and caller is
+//   responsible for keeping it alive.
+// - |injectionEvaluator| can proxy all javascript calls to |webView| to
+//   sanitize the eveluated strings. If |injectionEvaluator| is nil, JavaScript
+//   is directly executed on |webView|.
+// - This class relies on the pre-injection of base.js in webView.
+// - This class will perform gesture recognition and JavaScript on every touch
+//   event on |webView| and can have performance impact.
+// TODO(crbug.com/228179): This class only triggers context menu on mainFrame.
+- (instancetype)initWithWebView:(WKWebView*)webView
+             injectionEvaluator:(id<CRWJSInjectionEvaluator>)injectionEvaluator
+                       delegate:(id<CRWContextMenuDelegate>)delegate
+    NS_DESIGNATED_INITIALIZER;
+
+- (instancetype)init NS_UNAVAILABLE;
+
+@end
+
+#endif  // IOS_WEB_WEB_STATE_UI_CRW_CONTEXT_MENU_CONTROLLER_H_