Upstream iOS web API.

ios/web/public/web_state/web_state.h

Index: ios/web/public/web_state/web_state.h
diff --git a/ios/web/public/web_state/web_state.h b/ios/web/public/web_state/web_state.h
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+// Copyright 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.
+
+#ifndef IOS_WEB_PUBLIC_WEB_STATE_WEB_STATE_H_
+#define IOS_WEB_PUBLIC_WEB_STATE_WEB_STATE_H_
+
+#include <string>
+
+#include "base/callback_forward.h"
+#include "base/supports_user_data.h"
+#include "ios/web/public/referrer.h"
+#include "ui/base/page_transition_types.h"
+#include "ui/base/window_open_disposition.h"
+#include "url/gurl.h"
+
+class GURL;
+
+#if defined(__OBJC__)
+// TODO(droger): Convert all the public web API to C++.
+@class CRWJSInjectionReceiver;
+#else
+class CRWJSInjectionReceiver;
+#endif  // defined(__OBJC__)
+
+namespace base {
+class DictionaryValue;
+}
+
+namespace web {
+
+class BrowserState;
+class NavigationManager;
+class WebStateObserver;
+
+// Core interface for interaction with the web.
+class WebState : public base::SupportsUserData {
+ public:
+  // Parameters for the OpenURL() method.
+  struct OpenURLParams {
+    OpenURLParams(const GURL& url,
+                  const Referrer& referrer,
+                  WindowOpenDisposition disposition,
+                  ui::PageTransition transition,
+                  bool is_renderer_initiated);
+    ~OpenURLParams();
+
+    // The URL/referrer to be opened.
+    GURL url;
+    Referrer referrer;
+
+    // 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;
+  };
+
+  virtual ~WebState() {}
+
+  // Gets the BrowserState associated with this WebState. Can never return null.
+  virtual BrowserState* GetBrowserState() const = 0;
+
+  // Opens a URL with the given disposition.  The transition specifies how this
+  // navigation should be recorded in the history system (for example, typed).
+  virtual void OpenURL(const OpenURLParams& params) = 0;
+
+  // Gets the NavigationManager associated with this WebState. Can never return
+  // NULL.
+  virtual NavigationManager* GetNavigationManager() = 0;
+
+  // Gets the CRWJSInjectionReceiver associated with this WebState.
+  virtual CRWJSInjectionReceiver* GetJSInjectionReceiver() const = 0;
+
+  // Gets the contents MIME type.
+  virtual const std::string& GetContentsMimeType() const = 0;
+
+  // Gets the value of the "Content-Language" HTTP header.
+  virtual const std::string& GetContentLanguageHeader() const = 0;
+
+  // Returns true if the current view is a web view with HTML.
+  virtual bool ContentIsHTML() const = 0;
+
+  // Gets the URL currently being displayed in the URL bar, if there is one.
+  // This URL might be a pending navigation that hasn't committed yet, so it is
+  // not guaranteed to match the current page in this WebState. A typical
+  // example of this is interstitials, which show the URL of the new/loading
+  // page (active) but the security context is of the old page (last committed).
+  virtual const GURL& GetVisibleURL() const = 0;
+
+  // Gets the last committed URL. It represents the current page that is
+  // displayed in this WebState. It represents the current security context.
+  virtual const GURL& GetLastCommittedURL() const = 0;
+
+  // Callback used to handle script commands.
+  // The callback must return true if the command was handled, and false
+  // otherwise.
+  // In particular the callback must return false if the command is unexpected
+  // or ill-formatted.
+  // The first parameter is the content of the command, the second parameter is
+  // the URL of the page, and the third parameter is a bool indicating if the
+  // user is currently interacting with the page.
+  typedef base::Callback<bool(const base::DictionaryValue&, const GURL&, bool)>
+      ScriptCommandCallback;
+
+  // Registers a callback that will be called when a command matching
+  // |command_prefix| is received.
+  virtual void AddScriptCommandCallback(const ScriptCommandCallback& callback,
+                                        const std::string& command_prefix) = 0;
+
+  // Removes the callback associated with |command_prefix|.
+  virtual void RemoveScriptCommandCallback(
+      const std::string& command_prefix) = 0;
+
+ protected:
+  friend class WebStateObserver;
+
+  // Adds and removes observers for page navigation notifications. The order in
+  // which notifications are sent to observers is undefined. Clients must be
+  // sure to remove the observer before they go away.
+  // TODO(droger): Move these methods to WebStateImpl once it is in ios/.
+  virtual void AddObserver(WebStateObserver* observer) = 0;
+  virtual void RemoveObserver(WebStateObserver* observer) = 0;
+
+  WebState() {}
+};
+
+}  // namespace web
+
+#endif  // IOS_WEB_PUBLIC_WEB_STATE_WEB_STATE_H_