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// Copyright (c) 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 CONTENT_BROWSER_SITE_INSTANCE_IMPL_H_
#define CONTENT_BROWSER_SITE_INSTANCE_IMPL_H_
#include "content/browser/renderer_host/render_process_host_impl.h"
#include "content/common/content_export.h"
#include "content/public/browser/render_process_host_observer.h"
#include "content/public/browser/site_instance.h"
#include "url/gurl.h"
namespace content {
class RenderProcessHostFactory;
class CONTENT_EXPORT SiteInstanceImpl : public SiteInstance,
public RenderProcessHostObserver {
public:
// SiteInstance interface overrides.
virtual int32 GetId() OVERRIDE;
virtual bool HasProcess() const OVERRIDE;
virtual RenderProcessHost* GetProcess() OVERRIDE;
virtual const GURL& GetSiteURL() const OVERRIDE;
virtual SiteInstance* GetRelatedSiteInstance(const GURL& url) OVERRIDE;
virtual bool IsRelatedSiteInstance(const SiteInstance* instance) OVERRIDE;
virtual BrowserContext* GetBrowserContext() const OVERRIDE;
// Set the web site that this SiteInstance is rendering pages for.
// This includes the scheme and registered domain, but not the port. If the
// URL does not have a valid registered domain, then the full hostname is
// stored.
void SetSite(const GURL& url);
bool HasSite() const;
// Returns whether there is currently a related SiteInstance (registered with
// BrowsingInstance) for the site of the given url. If so, we should try to
// avoid dedicating an unused SiteInstance to it (e.g., in a new tab).
bool HasRelatedSiteInstance(const GURL& url);
// Returns whether this SiteInstance has a process that is the wrong type for
// the given URL. If so, the browser should force a process swap when
// navigating to the URL.
bool HasWrongProcessForURL(const GURL& url);
// Increase the number of active views in this SiteInstance. This is
// increased when a view is created, or a currently swapped out view
// is swapped in.
void increment_active_view_count() { active_view_count_++; }
// Decrease the number of active views in this SiteInstance. This is
// decreased when a view is destroyed, or a currently active view is
// swapped out.
void decrement_active_view_count() { active_view_count_--; }
// Get the number of active views which belong to this
// SiteInstance. If there is no active view left in this
// SiteInstance, all view in this SiteInstance can be safely
// discarded to save memory.
size_t active_view_count() { return active_view_count_; }
// Sets the global factory used to create new RenderProcessHosts. It may be
// NULL, in which case the default BrowserRenderProcessHost will be created
// (this is the behavior if you don't call this function). The factory must
// be set back to NULL before it's destroyed; ownership is not transferred.
static void set_render_process_host_factory(
const RenderProcessHostFactory* rph_factory);
// Get the effective URL for the given actual URL. This allows the
// ContentBrowserClient to override the SiteInstance's site for certain URLs.
// For example, Chrome uses this to replace hosted app URLs with extension
// hosts.
// Only public so that we can make a consistent process swap decision in
// RenderFrameHostManager.
static GURL GetEffectiveURL(BrowserContext* browser_context,
const GURL& url);
protected:
friend class BrowsingInstance;
friend class SiteInstance;
// Virtual to allow tests to extend it.
virtual ~SiteInstanceImpl();
// Create a new SiteInstance. Protected to give access to BrowsingInstance
// and tests; most callers should use Create or GetRelatedSiteInstance
// instead.
explicit SiteInstanceImpl(BrowsingInstance* browsing_instance);
private:
// RenderProcessHostObserver implementation.
virtual void RenderProcessHostDestroyed(RenderProcessHost* host) OVERRIDE;
// Used to restrict a process' origin access rights.
void LockToOrigin();
// An object used to construct RenderProcessHosts.
static const RenderProcessHostFactory* g_render_process_host_factory_;
// The next available SiteInstance ID.
static int32 next_site_instance_id_;
// A unique ID for this SiteInstance.
int32 id_;
// The number of active views under this SiteInstance.
size_t active_view_count_;
// BrowsingInstance to which this SiteInstance belongs.
scoped_refptr<BrowsingInstance> browsing_instance_;
// Current RenderProcessHost that is rendering pages for this SiteInstance.
// This pointer will only change once the RenderProcessHost is destructed. It
// will still remain the same even if the process crashes, since in that
// scenario the RenderProcessHost remains the same.
RenderProcessHost* process_;
// The web site that this SiteInstance is rendering pages for.
GURL site_;
// Whether SetSite has been called.
bool has_site_;
DISALLOW_COPY_AND_ASSIGN(SiteInstanceImpl);
};
} // namespace content
#endif // CONTENT_BROWSER_SITE_INSTANCE_IMPL_H_
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