InstantExtended: Committed NTP

chrome/browser/instant/instant_ntp.h

+// 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 CHROME_BROWSER_INSTANT_INSTANT_NTP_H_
+#define CHROME_BROWSER_INSTANT_INSTANT_NTP_H_
+
+#include <string>
+
+#include "base/basictypes.h"
+#include "base/compiler_specific.h"
+#include "base/memory/scoped_ptr.h"
+#include "chrome/browser/instant/instant_loader.h"
+#include "chrome/browser/instant/instant_page.h"
+
+class Profile;
+
+// InstantNTP is used to preload an Instant page that will be swapped in when a
+// user navigates to a New Tab Page (NTP). The InstantNTP contents are never
+// shown in an un-committed state.
+class InstantNTP : public InstantPage,
+                   public InstantLoader::Delegate {
+ public:
+  InstantNTP(InstantPage::Delegate* delegate, const std::string& instant_url);
+  virtual ~InstantNTP();
+
+  // Creates a new WebContents and loads |instant_url_| into it. Uses
+  // |active_tab|, if non-NULL, to initialize the size of the WebContents.
+  // |on_stale_callback| will be called when |loader_| determines the page to
+  // be stale.
+  void InitContents(Profile* profile,
+                    const content::WebContents* active_tab,
+                    const base::Closure& on_stale_callback);
+
+  // Releases the WebContents for the instant page.  This should be called when
+  // the page is about to be committed.
+  scoped_ptr<content::WebContents> ReleaseContents() WARN_UNUSED_RESULT;
+
+  // Returns the URL that we're loading.
+  const std::string& instant_url() const { return instant_url_; }
+
+ private:
+  // Overriden from InstantLoader::Delegate:
+  virtual void OnSwappedContents() OVERRIDE;
+  virtual void OnFocus() OVERRIDE;
+  virtual void OnMouseDown() OVERRIDE;
+  virtual void OnMouseUp() OVERRIDE;
+  virtual content::WebContents* OpenURLFromTab(
+      content::WebContents* source,
+      const content::OpenURLParams& params) OVERRIDE;
+
+  // Overridden from InstantPage:
+  virtual bool ShouldProcessRenderViewCreated() OVERRIDE;
+  virtual bool ShouldProcessRenderViewGone() OVERRIDE;
+
+  InstantLoader loader_;
+  const std::string instant_url_;
+
+  DISALLOW_COPY_AND_ASSIGN(InstantNTP);
+};
+
+#endif  // CHROME_BROWSER_INSTANT_INSTANT_NTP_H_