ios/web/public/web_client.h

   1 // Copyright 2014 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #ifndef IOS_WEB_PUBLIC_WEB_CLIENT_H_
   6 #define IOS_WEB_PUBLIC_WEB_CLIENT_H_
   7
   8 #include <string>
   9 #include <vector>
  10
  11 #include "base/strings/string16.h"
  12 #include "base/strings/string_piece.h"
  13 #include "ios/web/public/web_view_type.h"
  14 #include "ui/base/layout.h"
  15
  16 namespace base {
  17 class RefCountedStaticMemory;
  18 }
  19
  20 class GURL;
  21
  22 #ifdef __OBJC__
  23 @class UIWebView;
  24 @class NSString;
  25 #else
  26 class UIWebView;
  27 class NSString;
  28 #endif
  29
  30 namespace web {
  31
  32 class BrowserState;
  33 class BrowserURLRewriter;
  34 class WebClient;
  35 class WebMainParts;
  36 class WebViewFactory;
  37
  38 // Setter and getter for the client.  The client should be set early, before any
  39 // web code is called.
  40 void SetWebClient(WebClient* client);
  41 WebClient* GetWebClient();
  42
  43 // Interface that the embedder of the web layer implements.
  44 class WebClient {
  45  public:
  46   WebClient();
  47   virtual ~WebClient();
  48
  49   // Allows the embedder to set a custom WebMainParts implementation for the
  50   // browser startup code.
  51   virtual WebMainParts* CreateWebMainParts();
  52
  53   // Gives the embedder a chance to perform tasks before a web view is created.
  54   virtual void PreWebViewCreation() const {}
  55
  56   // Gives the embedder a chance to set up the given web view before presenting
  57   // it in the UI.
  58   virtual void PostWebViewCreation(UIWebView* web_view) const {}
  59
  60   // Returns a factory that vends WebViews.
  61   virtual WebViewFactory* GetWebViewFactory() const;
  62
  63   // Returns the languages used in the Accept-Languages HTTP header.
  64   // Used to decide URL formating.
  65   virtual std::string GetAcceptLangs(BrowserState* state) const;
  66
  67   // Returns the embedding application locale string.
  68   virtual std::string GetApplicationLocale() const;
  69
  70   // Returns true if URL has application specific schema. Embedder must return
  71   // true for every custom app specific schema it supports. For example Chromium
  72   // browser would return true for "chrome://about" URL.
  73   virtual bool IsAppSpecificURL(const GURL& url) const;
  74
  75   // Returns text to be displayed for an unsupported plugin.
  76   virtual base::string16 GetPluginNotSupportedText() const;
  77
  78   // Returns a string describing the embedder product name and version, of the
  79   // form "productname/version".  Used as part of the user agent string.
  80   virtual std::string GetProduct() const;
  81
  82   // Returns the user agent. |desktop_user_agent| is true if desktop user agent
  83   // is requested.
  84   virtual std::string GetUserAgent(bool desktop_user_agent) const;
  85
  86   // Returns a string resource given its id.
  87   virtual base::string16 GetLocalizedString(int message_id) const;
  88
  89   // Returns the contents of a resource in a StringPiece given the resource id.
  90   virtual base::StringPiece GetDataResource(int resource_id,
  91                                             ui::ScaleFactor scale_factor) const;
  92
  93   // Returns the raw bytes of a scale independent data resource.
  94   virtual base::RefCountedStaticMemory* GetDataResourceBytes(
  95       int resource_id) const;
  96
  97   // Returns a list of additional WebUI schemes, if any. These additional
  98   // schemes act as aliases to the about: scheme. The additional schemes may or
  99   // may not serve specific WebUI pages depending on the particular
 100   // URLDataSourceIOS and its override of
 101   // URLDataSourceIOS::ShouldServiceRequest. For all schemes returned here,
 102   // view-source is allowed.
 103   virtual void GetAdditionalWebUISchemes(
 104       std::vector<std::string>* additional_schemes) {}
 105
 106   // Gives the embedder a chance to add url rewriters to the BrowserURLRewriter
 107   // singleton.
 108   virtual void PostBrowserURLRewriterCreation(BrowserURLRewriter* rewriter) {}
 109
 110   // Gives the embedder a chance to provide the JavaScript to be injected into
 111   // the web view as early as possible. Result must not be nil.
 112   virtual NSString* GetEarlyPageScript(WebViewType web_view_type) const;
 113 };
 114
 115 }  // namespace web
 116
 117 #endif  // IOS_WEB_PUBLIC_WEB_CLIENT_H_