ios/web/public/navigation_item.h

// Copyright 2014 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_PUBLIC_NAVIGATION_ITEM_H_
#define IOS_WEB_PUBLIC_NAVIGATION_ITEM_H_

#include "base/memory/scoped_ptr.h"
#include "base/strings/string16.h"
#include "base/time/time.h"
#include "ui/base/page_transition_types.h"

class GURL;

namespace web {
struct FaviconStatus;
struct Referrer;
struct SSLStatus;

// A NavigationItem is a data structure that captures all the information
// required to recreate a browsing state. It represents one point in the
// chain of navigation managed by a NavigationManager.
class NavigationItem {
 public:
  virtual ~NavigationItem() {}

  // Creates a new NavigationItem.
  static scoped_ptr<NavigationItem> Create();

  // Page-related stuff --------------------------------------------------------

  // A unique ID is preserved across commits and redirects, which means that
  // sometimes a NavigationEntry's unique ID needs to be set (e.g. when
  // creating a committed entry to correspond to a to-be-deleted pending entry,
  // the pending entry's ID must be copied).
  virtual int GetUniqueID() const = 0;

  // The actual URL of the page. For some about pages, this may be a scary
  // data: URL or something like that. Use GetVirtualURL() below for showing to
  // the user.
  virtual void SetURL(const GURL& url) = 0;
  virtual const GURL& GetURL() const = 0;

  // The referring URL. Can be empty.
  virtual void SetReferrer(const Referrer& referrer) = 0;
  virtual const Referrer& GetReferrer() const = 0;

  // The virtual URL, when nonempty, will override the actual URL of the page
  // when we display it to the user. This allows us to have nice and friendly
  // URLs that the user sees for things like about: URLs, but actually feed
  // the renderer a data URL that results in the content loading.
  //
  // GetVirtualURL() will return the URL to display to the user in all cases, so
  // if there is no overridden display URL, it will return the actual one.
  virtual void SetVirtualURL(const GURL& url) = 0;
  virtual const GURL& GetVirtualURL() const = 0;

  // The title as set by the page. This will be empty if there is no title set.
  // The caller is responsible for detecting when there is no title and
  // displaying the appropriate "Untitled" label if this is being displayed to
  // the user.
  virtual void SetTitle(const base::string16& title) = 0;
  virtual const base::string16& GetTitle() const = 0;

  // Describes the current page that the tab represents. This is the ID that the
  // renderer generated for the page and is how we can tell new versus
  // renavigations.
  virtual void SetPageID(int page_id) = 0;
  virtual int32 GetPageID() const = 0;

  // Page-related helpers ------------------------------------------------------

  // Returns the title to be displayed on the tab. This could be the title of
  // the page if it is available or the URL. |languages| is the list of
  // accpeted languages (e.g., prefs::kAcceptLanguages) or empty if proper
  // URL formatting isn't needed (e.g., unit tests).
  virtual const base::string16& GetTitleForDisplay(
      const std::string& languages) const = 0;

  // Tracking stuff ------------------------------------------------------------

  // The transition type indicates what the user did to move to this page from
  // the previous page.
  virtual void SetTransitionType(ui::PageTransition transition_type) = 0;
  virtual ui::PageTransition GetTransitionType() const = 0;

  // The favicon data and tracking information. See web::FaviconStatus.
  virtual const FaviconStatus& GetFavicon() const = 0;
  virtual FaviconStatus& GetFavicon() = 0;

  // All the SSL flags and state. See web::SSLStatus.
  virtual const SSLStatus& GetSSL() const = 0;
  virtual SSLStatus& GetSSL() = 0;

  // The time at which the last known local navigation has
  // completed. (A navigation can be completed more than once if the
  // page is reloaded.)
  //
  // If GetTimestamp() returns a null time, that means that either:
  //
  //   - this navigation hasn't completed yet;
  //   - this navigation was restored and for some reason the
  //     timestamp wasn't available;
  //   - or this navigation was copied from a foreign session.
  virtual void SetTimestamp(base::Time timestamp) = 0;
  virtual base::Time GetTimestamp() const = 0;
};

}  // namespace web

#endif  // IOS_WEB_PUBLIC_NAVIGATION_ITEM_H_