content/public/renderer/render_thread.h

   1 // Copyright (c) 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 CONTENT_PUBLIC_RENDERER_RENDER_THREAD_H_
   6 #define CONTENT_PUBLIC_RENDERER_RENDER_THREAD_H_
   7
   8 #include "base/basictypes.h"
   9 #include "base/callback.h"
  10 #include "base/memory/shared_memory.h"
  11 #include "base/metrics/user_metrics_action.h"
  12 #include "content/common/content_export.h"
  13 #include "ipc/ipc_channel_proxy.h"
  14 #include "ipc/ipc_sender.h"
  15
  16 #if defined(OS_WIN)
  17 #include <windows.h>
  18 #endif
  19
  20 class GURL;
  21
  22 namespace base {
  23 class MessageLoop;
  24 class MessageLoopProxy;
  25 class WaitableEvent;
  26 }
  27
  28 namespace IPC {
  29 class MessageFilter;
  30 class SyncChannel;
  31 class SyncMessageFilter;
  32 }
  33
  34 namespace v8 {
  35 class Extension;
  36 }
  37
  38 namespace content {
  39
  40 class RenderProcessObserver;
  41 class ResourceDispatcherDelegate;
  42 class ServiceRegistry;
  43
  44 class CONTENT_EXPORT RenderThread : public IPC::Sender {
  45  public:
  46   // Returns the one render thread for this process.  Note that this can only
  47   // be accessed when running on the render thread itself.
  48   static RenderThread* Get();
  49
  50   RenderThread();
  51   virtual ~RenderThread();
  52
  53   virtual base::MessageLoop* GetMessageLoop() = 0;
  54   virtual IPC::SyncChannel* GetChannel() = 0;
  55   virtual std::string GetLocale() = 0;
  56   virtual IPC::SyncMessageFilter* GetSyncMessageFilter() = 0;
  57   virtual scoped_refptr<base::MessageLoopProxy> GetIOMessageLoopProxy() = 0;
  58
  59   // Called to add or remove a listener for a particular message routing ID.
  60   // These methods normally get delegated to a MessageRouter.
  61   virtual void AddRoute(int32 routing_id, IPC::Listener* listener) = 0;
  62   virtual void RemoveRoute(int32 routing_id) = 0;
  63   virtual int GenerateRoutingID() = 0;
  64
  65   // These map to IPC::ChannelProxy methods.
  66   virtual void AddFilter(IPC::MessageFilter* filter) = 0;
  67   virtual void RemoveFilter(IPC::MessageFilter* filter) = 0;
  68
  69   // Add/remove observers for the process.
  70   virtual void AddObserver(RenderProcessObserver* observer) = 0;
  71   virtual void RemoveObserver(RenderProcessObserver* observer) = 0;
  72
  73   // Set the ResourceDispatcher delegate object for this process.
  74   virtual void SetResourceDispatcherDelegate(
  75       ResourceDispatcherDelegate* delegate) = 0;
  76
  77   // We initialize WebKit as late as possible. Call this to force
  78   // initialization.
  79   virtual void EnsureWebKitInitialized() = 0;
  80
  81   // Sends over a base::UserMetricsAction to be recorded by user metrics as
  82   // an action. Once a new user metric is added, run
  83   //   tools/metrics/actions/extract_actions.py
  84   // to add the metric to actions.xml, then update the <owner>s and
  85   // <description> sections. Make sure to include the actions.xml file when you
  86   // upload your code for review!
  87   //
  88   // WARNING: When using base::UserMetricsAction, base::UserMetricsAction
  89   // and a string literal parameter must be on the same line, e.g.
  90   //   RenderThread::Get()->RecordAction(
  91   //       base::UserMetricsAction("my extremely long action name"));
  92   // because otherwise our processing scripts won't pick up on new actions.
  93   virtual void RecordAction(const base::UserMetricsAction& action) = 0;
  94
  95   // Sends over a string to be recorded by user metrics as a computed action.
  96   // When you use this you need to also update the rules for extracting known
  97   // actions in chrome/tools/extract_actions.py.
  98   virtual void RecordComputedAction(const std::string& action) = 0;
  99
 100   // Asks the host to create a block of shared memory for the renderer.
 101   // The shared memory allocated by the host is returned back.
 102   virtual scoped_ptr<base::SharedMemory> HostAllocateSharedMemoryBuffer(
 103       size_t buffer_size) = 0;
 104
 105   // Registers the given V8 extension with WebKit.
 106   virtual void RegisterExtension(v8::Extension* extension) = 0;
 107
 108   // Schedule a call to IdleHandler with the given initial delay.
 109   virtual void ScheduleIdleHandler(int64 initial_delay_ms) = 0;
 110
 111   // A task we invoke periodically to assist with idle cleanup.
 112   virtual void IdleHandler() = 0;
 113
 114   // Get/Set the delay for how often the idle handler is called.
 115   virtual int64 GetIdleNotificationDelayInMs() const = 0;
 116   virtual void SetIdleNotificationDelayInMs(
 117       int64 idle_notification_delay_in_ms) = 0;
 118
 119   virtual void UpdateHistograms(int sequence_number) = 0;
 120
 121   // Post task to all worker threads. Returns number of workers.
 122   virtual int PostTaskToAllWebWorkers(const base::Closure& closure) = 0;
 123
 124   // Resolve the proxy servers to use for a given url. On success true is
 125   // returned and |proxy_list| is set to a PAC string containing a list of
 126   // proxy servers.
 127   virtual bool ResolveProxy(const GURL& url, std::string* proxy_list) = 0;
 128
 129   // Gets the shutdown event for the process.
 130   virtual base::WaitableEvent* GetShutdownEvent() = 0;
 131
 132 #if defined(OS_WIN)
 133   // Request that the given font be loaded by the browser so it's cached by the
 134   // OS. Please see ChildProcessHost::PreCacheFont for details.
 135   virtual void PreCacheFont(const LOGFONT& log_font) = 0;
 136
 137   // Release cached font.
 138   virtual void ReleaseCachedFonts() = 0;
 139 #endif
 140
 141   // Returns the ServiceRegistry for this thread.
 142   virtual ServiceRegistry* GetServiceRegistry() = 0;
 143 };
 144
 145 }  // namespace content
 146
 147 #endif  // CONTENT_PUBLIC_RENDERER_RENDER_THREAD_H_