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| 1 // Copyright 2012 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 CHROME_BROWSER_INSTANT_INSTANT_LOADER_H_ | |
| 6 #define CHROME_BROWSER_INSTANT_INSTANT_LOADER_H_ | |
| 7 | |
| 8 #include "base/basictypes.h" | |
| 9 #include "base/callback.h" | |
| 10 #include "base/compiler_specific.h" | |
| 11 #include "base/memory/scoped_ptr.h" | |
| 12 #include "base/timer.h" | |
| 13 #include "chrome/browser/ui/tab_contents/core_tab_helper_delegate.h" | |
| 14 #include "content/public/browser/notification_observer.h" | |
| 15 #include "content/public/browser/notification_registrar.h" | |
| 16 #include "content/public/browser/web_contents_delegate.h" | |
| 17 | |
| 18 class GURL; | |
| 19 class Profile; | |
| 20 | |
| 21 namespace content { | |
| 22 struct OpenURLParams; | |
| 23 class WebContents; | |
| 24 } | |
| 25 | |
| 26 // InstantLoader is used to create and maintain a WebContents where we can | |
| 27 // preload a page into. It is used by InstantOverlay and InstantNTP to | |
| 28 // preload an Instant page. | |
| 29 class InstantLoader : public content::NotificationObserver, | |
| 30 public content::WebContentsDelegate, | |
| 31 public CoreTabHelperDelegate { | |
| 32 public: | |
| 33 // InstantLoader calls these methods on its delegate in response to certain | |
| 34 // changes in the underlying contents. | |
| 35 class Delegate { | |
| 36 public: | |
| 37 // Called after someone has swapped in a different WebContents for ours. | |
| 38 virtual void OnSwappedContents() = 0; | |
| 39 | |
| 40 // Called when the underlying contents receive focus. | |
| 41 virtual void OnFocus() = 0; | |
| 42 | |
| 43 // Called when the mouse pointer is down. | |
| 44 virtual void OnMouseDown() = 0; | |
| 45 | |
| 46 // Called when the mouse pointer is released (or a drag event ends). | |
| 47 virtual void OnMouseUp() = 0; | |
| 48 | |
| 49 // Called to open a URL using the underlying contents (see | |
| 50 // WebContentsDelegate::OpenURLFromTab). The Delegate should return the | |
| 51 // WebContents the URL is opened in, or NULL if the URL wasn't opened | |
| 52 // immediately. | |
| 53 virtual content::WebContents* OpenURLFromTab( | |
| 54 content::WebContents* source, | |
| 55 const content::OpenURLParams& params) = 0; | |
| 56 | |
| 57 // Called when a main frame load is complete. | |
| 58 virtual void LoadCompletedMainFrame() = 0; | |
| 59 | |
| 60 protected: | |
| 61 ~Delegate(); | |
| 62 }; | |
| 63 | |
| 64 explicit InstantLoader(Delegate* delegate); | |
| 65 virtual ~InstantLoader(); | |
| 66 | |
| 67 // Creates a new WebContents in the context of |profile| that will be used to | |
| 68 // load |instant_url|. The page is not actually loaded until Load() is | |
| 69 // called. Uses |active_contents|, if non-NULL, to initialize the size of the | |
| 70 // new contents. |on_stale_callback| will be called after kStalePageTimeoutMS | |
| 71 // has elapsed after Load() being called. | |
| 72 void Init(const GURL& instant_url, | |
| 73 Profile* profile, | |
| 74 const content::WebContents* active_contents, | |
| 75 const base::Closure& on_stale_callback); | |
| 76 | |
| 77 // Loads |instant_url_| in |contents_|. | |
| 78 void Load(); | |
| 79 | |
| 80 // Returns the contents currently held. May be NULL. | |
| 81 content::WebContents* contents() const { return contents_.get(); } | |
| 82 | |
| 83 // Replaces the contents held with |contents|. Any existing contents is | |
| 84 // deleted. The expiration timer is not restarted. | |
| 85 void SetContents(scoped_ptr<content::WebContents> contents); | |
| 86 | |
| 87 // Releases the contents currently held. Must only be called if contents() is | |
| 88 // not NULL. | |
| 89 scoped_ptr<content::WebContents> ReleaseContents() WARN_UNUSED_RESULT; | |
| 90 | |
| 91 private: | |
| 92 // Overridden from content::NotificationObserver: | |
| 93 virtual void Observe(int type, | |
| 94 const content::NotificationSource& source, | |
| 95 const content::NotificationDetails& details) OVERRIDE; | |
| 96 | |
| 97 // Overridden from CoreTabHelperDelegate: | |
| 98 virtual void SwapTabContents(content::WebContents* old_contents, | |
| 99 content::WebContents* new_contents) OVERRIDE; | |
| 100 | |
| 101 // Overridden from content::WebContentsDelegate: | |
| 102 virtual bool ShouldSuppressDialogs() OVERRIDE; | |
| 103 virtual bool ShouldFocusPageAfterCrash() OVERRIDE; | |
| 104 virtual void LostCapture() OVERRIDE; | |
| 105 virtual void WebContentsFocused(content::WebContents* contents) OVERRIDE; | |
| 106 virtual bool CanDownload(content::RenderViewHost* render_view_host, | |
| 107 int request_id, | |
| 108 const std::string& request_method) OVERRIDE; | |
| 109 virtual void HandleMouseDown() OVERRIDE; | |
| 110 virtual void HandleMouseUp() OVERRIDE; | |
| 111 virtual void HandlePointerActivate() OVERRIDE; | |
| 112 virtual void HandleGestureEnd() OVERRIDE; | |
| 113 virtual void DragEnded() OVERRIDE; | |
| 114 virtual bool OnGoToEntryOffset(int offset) OVERRIDE; | |
| 115 virtual content::WebContents* OpenURLFromTab( | |
| 116 content::WebContents* source, | |
| 117 const content::OpenURLParams& params) OVERRIDE; | |
| 118 | |
| 119 Delegate* const delegate_; | |
| 120 scoped_ptr<content::WebContents> contents_; | |
| 121 | |
| 122 // The URL we will be loading. | |
| 123 GURL instant_url_; | |
| 124 | |
| 125 // Called when |stale_page_timer_| fires. | |
| 126 base::Closure on_stale_callback_; | |
| 127 | |
| 128 // Used to mark when the page is stale. | |
| 129 base::Timer stale_page_timer_; | |
| 130 | |
| 131 // Used to get notifications about renderers. | |
| 132 content::NotificationRegistrar registrar_; | |
| 133 | |
| 134 DISALLOW_COPY_AND_ASSIGN(InstantLoader); | |
| 135 }; | |
| 136 | |
| 137 #endif // CHROME_BROWSER_INSTANT_INSTANT_LOADER_H_ | |
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Chromium Code Reviews
Issue 12520005:
Move desktop-specific Instant bits to c/b/ui/search. (Closed)
Base URL: https://chromium.googlesource.com/chromium/src.git@master