InstantExtended: Committed NTP

chrome/browser/instant/instant_client.h

-// Copyright 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.
-
-#ifndef CHROME_BROWSER_INSTANT_INSTANT_CLIENT_H_
-#define CHROME_BROWSER_INSTANT_INSTANT_CLIENT_H_
-
-#include <vector>
-
-#include "base/basictypes.h"
-#include "base/compiler_specific.h"
-#include "base/string16.h"
-#include "chrome/common/instant_types.h"
-#include "content/public/browser/web_contents_observer.h"
-
-namespace chrome {
-namespace search {
-struct Mode;
-}
-}
-
-namespace content {
-class WebContents;
-}
-
-namespace gfx {
-class Rect;
-}
-
-// InstantClient is used to exchange messages between its delegate and a page
-// that supports the Instant API (http://dev.chromium.org/searchbox).
-class InstantClient : public content::WebContentsObserver {
- public:
-  // When InstantClient receives messages from the page, it calls the following
-  // methods on its delegate.
-  class Delegate {
-   public:
-    // Called when the page has suggestions. Usually in response to Change(),
-    // SendAutocompleteResults() or UpOrDownKeyPressed().
-    virtual void SetSuggestions(
-        const std::vector<InstantSuggestion>& suggestions) = 0;
-
-    // Called upon determination of Instant API support. Usually in response to
-    // SetContents() or when the page first finishes loading.
-    virtual void InstantSupportDetermined(bool supports_instant) = 0;
-
-    // Called when the page wants to be shown. Usually in response to Change(),
-    // SendAutocompleteResults() or SearchModeChanged().
-    virtual void ShowInstantPreview(InstantShownReason reason,
-                                    int height,
-                                    InstantSizeUnits units) = 0;
-
-    // Called when the page wants the browser to start capturing user key
-    // strokes.
-    virtual void StartCapturingKeyStrokes() = 0;
-
-    // Called when the page wants the browser to stop capturing user key
-    // strokes.
-    virtual void StopCapturingKeyStrokes() = 0;
-
-    // Called when the underlying RenderView crashes.
-    virtual void RenderViewGone() = 0;
-
-    // Called when the page is about to navigate.
-    virtual void AboutToNavigateMainFrame(const GURL& url) = 0;
-
-    // Called when the SearchBox wants to navigate to the specified URL.
-    virtual void NavigateToURL(const GURL& url,
-                               content::PageTransition transition) = 0;
-
-    // Called when a RenderView is created, so that state can be initialized.
-    virtual void RenderViewCreated() = 0;
-
-   protected:
-    virtual ~Delegate();
-  };
-
-  // Doesn't take ownership of |delegate|.
-  explicit InstantClient(Delegate* delegate);
-  virtual ~InstantClient();
-
-  // Sets |contents| as the page to communicate with. |contents| can be NULL,
-  // which effectively stops all communication.
-  void SetContents(content::WebContents* contents);
-
-  // Tells the page that the user typed |text| into the omnibox. If |verbatim|
-  // is false, the page predicts the query the user means to type and fetches
-  // results for the prediction. If |verbatim| is true, |text| is taken as the
-  // exact query (no prediction is made).
-  void Update(const string16& text,
-              size_t selection_start,
-              size_t selection_end,
-              bool verbatim);
-
-  // Tells the page that the user pressed Enter in the omnibox.
-  void Submit(const string16& text);
-
-  // Tells the page that the user clicked on it. Nothing is being cancelled; the
-  // poor choice of name merely reflects the IPC of the same (poor) name.
-  void Cancel(const string16& text);
-
-  // Tells the page the bounds of the omnibox dropdown (in screen coordinates).
-  // This is used by the page to offset the results to avoid them being covered
-  // by the omnibox dropdown.
-  void SetPopupBounds(const gfx::Rect& bounds);
-
-  // Tells the page what size start and end margins to use.
-  void SetMarginSize(const int start, const int end);
-
-  // Tells the page about the font information.
-  void InitializeFonts();
-
-  // Tells the renderer to determine if the page supports the Instant API, which
-  // results in a call to InstantSupportDetermined() when the reply is received.
-  void DetermineIfPageSupportsInstant();
-
-  // Tells the page about the available autocomplete results.
-  void SendAutocompleteResults(
-      const std::vector<InstantAutocompleteResult>& results);
-
-  // Tells the page that the user pressed Up or Down in the omnibox. |count| is
-  // a repeat count, negative for moving up, positive for moving down.
-  void UpOrDownKeyPressed(int count);
-
-  // Tells the page that the active tab's search mode has changed.
-  void SearchModeChanged(const chrome::search::Mode& mode);
-
-  // Tells the page about the current theme background.
-  void SendThemeBackgroundInfo(const ThemeBackgroundInfo& theme_info);
-
-  // Tells the page about the current theme area height.
-  void SendThemeAreaHeight(int height);
-
-  // Tells the page whether it is allowed to display Instant results.
-  void SetDisplayInstantResults(bool display_instant_results);
-
-  // Tells the page whether the browser is capturing user key strokes.
-  void KeyCaptureChanged(bool is_key_capture_enabled);
-
- private:
-  // Overridden from content::WebContentsObserver:
-  virtual void RenderViewCreated(
-      content::RenderViewHost* render_view_host) OVERRIDE;
-  virtual void DidFinishLoad(
-      int64 frame_id,
-      const GURL& validated_url,
-      bool is_main_frame,
-      content::RenderViewHost* render_view_host) OVERRIDE;
-  virtual bool OnMessageReceived(const IPC::Message& message) OVERRIDE;
-  virtual void RenderViewGone(base::TerminationStatus status) OVERRIDE;
-  virtual void DidCommitProvisionalLoadForFrame(
-      int64 frame_id,
-      bool is_main_frame,
-      const GURL& url,
-      content::PageTransition transition_type,
-      content::RenderViewHost* render_view_host) OVERRIDE;
-
-  void SetSuggestions(int page_id,
-                      const std::vector<InstantSuggestion>& suggestions);
-  void InstantSupportDetermined(int page_id, bool result);
-  void ShowInstantPreview(int page_id,
-                          InstantShownReason reason,
-                          int height,
-                          InstantSizeUnits units);
-  void StartCapturingKeyStrokes(int page_id);
-  void StopCapturingKeyStrokes(int page_id);
-  void SearchBoxNavigate(int page_id, const GURL& url,
-                         content::PageTransition transition);
-
-  Delegate* const delegate_;
-
-  DISALLOW_COPY_AND_ASSIGN(InstantClient);
-};
-
-#endif  // CHROME_BROWSER_INSTANT_INSTANT_CLIENT_H_