// Copyright (c) 2012 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.

// PageNavigator defines an interface that can be used to express the user's
// intention to navigate to a particular URL.  The implementing class should
// perform the navigation.

#ifndef CONTENT_PUBLIC_BROWSER_PAGE_NAVIGATOR_H_
#define CONTENT_PUBLIC_BROWSER_PAGE_NAVIGATOR_H_

#include <string>
#include <vector>

#include "base/memory/ref_counted.h"
#include "content/common/content_export.h"
#include "content/public/browser/global_request_id.h"
#include "content/public/browser/reload_type.h"
#include "content/public/browser/render_frame_host.h"
#include "content/public/browser/site_instance.h"
#include "content/public/common/child_process_host.h"
#include "content/public/common/referrer.h"
#include "ipc/ipc_message.h"
#include "services/network/public/cpp/resource_request_body.h"
#include "services/network/public/cpp/shared_url_loader_factory.h"
#include "third_party/blink/public/web/web_triggering_event_info.h"
#include "ui/base/page_transition_types.h"
#include "ui/base/window_open_disposition.h"
#include "url/gurl.h"

namespace content {

class WebContents;

struct CONTENT_EXPORT OpenURLParams {
  OpenURLParams(const GURL& url,
                const Referrer& referrer,
                WindowOpenDisposition disposition,
                ui::PageTransition transition,
                bool is_renderer_initiated);
  OpenURLParams(const GURL& url,
                const Referrer& referrer,
                WindowOpenDisposition disposition,
                ui::PageTransition transition,
                bool is_renderer_initiated,
                bool started_from_context_menu);
  OpenURLParams(const GURL& url,
                const Referrer& referrer,
                int frame_tree_node_id,
                WindowOpenDisposition disposition,
                ui::PageTransition transition,
                bool is_renderer_initiated);
  OpenURLParams(const OpenURLParams& other);
  ~OpenURLParams();

  // The URL/referrer to be opened.
  GURL url;
  Referrer referrer;

  // The origin of the initiator of the navigation.
  base::Optional<url::Origin> initiator_origin;

  // SiteInstance of the frame that initiated the navigation or null if we
  // don't know it.
  scoped_refptr<content::SiteInstance> source_site_instance;

  // Any redirect URLs that occurred for this navigation before |url|.
  std::vector<GURL> redirect_chain;

  // Indicates whether this navigation will be sent using POST.
  bool uses_post;

  // The post data when the navigation uses POST.
  scoped_refptr<network::ResourceRequestBody> post_data;

  // Extra headers to add to the request for this page.  Headers are
  // represented as "<name>: <value>" and separated by \r\n.  The entire string
  // is terminated by \r\n.  May be empty if no extra headers are needed.
  std::string extra_headers;

  // The browser-global FrameTreeNode ID or RenderFrameHost::kNoFrameTreeNodeId
  // to indicate the main frame.
  int frame_tree_node_id;

  // Routing id of the source RenderFrameHost.
  int source_render_frame_id = MSG_ROUTING_NONE;

  // Process id of the source RenderFrameHost.
  int source_render_process_id = ChildProcessHost::kInvalidUniqueID;

  // The disposition requested by the navigation source.
  WindowOpenDisposition disposition;

  // The transition type of navigation.
  ui::PageTransition transition;

  // Whether this navigation is initiated by the renderer process.
  bool is_renderer_initiated;

  // Indicates whether this navigation should replace the current
  // navigation entry.
  bool should_replace_current_entry;

  // Indicates whether this navigation was triggered while processing a user
  // gesture if the navigation was initiated by the renderer.
  bool user_gesture;

  // Whether the call to OpenURL was triggered by an Event, and what the
  // isTrusted flag of the event was.
  blink::WebTriggeringEventInfo triggering_event_info =
      blink::WebTriggeringEventInfo::kUnknown;

  // Indicates whether this navigation was started via context menu.
  bool started_from_context_menu;

  // Optional URLLoaderFactory to facilitate navigation to a blob URL.
  scoped_refptr<network::SharedURLLoaderFactory> blob_url_loader_factory;

  // Indicates that the navigation should happen in an app window if
  // possible, i.e. if an app for the URL is installed.
  bool open_app_window_if_possible;

  // If this navigation was initiated from a link that specified the
  // hrefTranslate attribute, this contains the attribute's value (a BCP47
  // language code). Empty otherwise.
  std::string href_translate;

  // Indicates if this navigation is a reload.
  ReloadType reload_type;

 private:
  OpenURLParams();
};

class PageNavigator {
 public:
  virtual ~PageNavigator() {}

  // Opens a URL with the given disposition.  The transition specifies how this
  // navigation should be recorded in the history system (for example, typed).
  // Returns the WebContents the URL is opened in, or nullptr if the URL wasn't
  // opened immediately.
  virtual WebContents* OpenURL(const OpenURLParams& params) = 0;
};

}  // namespace content

#endif  // CONTENT_PUBLIC_BROWSER_PAGE_NAVIGATOR_H_
