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// Copyright (c) 2011 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.
#include "content/browser/speech/speech_input_dispatcher_host.h"
#include "base/lazy_instance.h"
#include "content/browser/content_browser_client.h"
#include "content/browser/speech/speech_input_preferences.h"
#include "content/common/speech_input_messages.h"
namespace speech_input {
//----------------------------- SpeechInputCallers -----------------------------
// A singleton class to map the tuple
// (render-process-id, render-view-id, requestid) to a single ID which is passed
// through rest of the speech code.
class SpeechInputDispatcherHost::SpeechInputCallers {
public:
// Creates a new ID for a given tuple.
int CreateId(int render_process_id, int render_view_id, int request_id);
// Returns the ID for a tuple assuming the ID was created earlier.
int GetId(int render_process_id, int render_view_id, int request_id);
// Removes the ID and associated tuple from the map.
void RemoveId(int id);
// Getters for the various tuple elements for the given ID.
int render_process_id(int id);
int render_view_id(int id);
int request_id(int id);
private:
struct CallerInfo {
int render_process_id;
int render_view_id;
int request_id;
};
friend struct base::DefaultLazyInstanceTraits<SpeechInputCallers>;
SpeechInputCallers();
std::map<int, CallerInfo> callers_;
int next_id_;
};
static base::LazyInstance<SpeechInputDispatcherHost::SpeechInputCallers>
g_speech_input_callers(base::LINKER_INITIALIZED);
SpeechInputDispatcherHost::SpeechInputCallers::SpeechInputCallers()
: next_id_(1) {
}
int SpeechInputDispatcherHost::SpeechInputCallers::GetId(int render_process_id,
int render_view_id,
int request_id) {
for (std::map<int, CallerInfo>::iterator it = callers_.begin();
it != callers_.end(); it++) {
const CallerInfo& item = it->second;
if (item.render_process_id == render_process_id &&
item.render_view_id == render_view_id &&
item.request_id == request_id) {
return it->first;
}
}
// Not finding an entry here is valid since a cancel/stop may have been issued
// by the renderer and before it received our response the user may have
// clicked the button to stop again. The caller of this method should take
// care of this case.
return 0;
}
int SpeechInputDispatcherHost::SpeechInputCallers::CreateId(
int render_process_id,
int render_view_id,
int request_id) {
CallerInfo info;
info.render_process_id = render_process_id;
info.render_view_id = render_view_id;
info.request_id = request_id;
callers_[next_id_] = info;
return next_id_++;
}
void SpeechInputDispatcherHost::SpeechInputCallers::RemoveId(int id) {
callers_.erase(id);
}
int SpeechInputDispatcherHost::SpeechInputCallers::render_process_id(int id) {
return callers_[id].render_process_id;
}
int SpeechInputDispatcherHost::SpeechInputCallers::render_view_id(int id) {
return callers_[id].render_view_id;
}
int SpeechInputDispatcherHost::SpeechInputCallers::request_id(int id) {
return callers_[id].request_id;
}
//-------------------------- SpeechInputDispatcherHost -------------------------
SpeechInputManager* SpeechInputDispatcherHost::manager_;
SpeechInputDispatcherHost::SpeechInputDispatcherHost(
int render_process_id,
net::URLRequestContextGetter* context_getter,
SpeechInputPreferences* speech_input_preferences)
: render_process_id_(render_process_id),
may_have_pending_requests_(false),
context_getter_(context_getter),
speech_input_preferences_(speech_input_preferences) {
// This is initialized by Browser. Do not add any non-trivial
// initialization here, instead do it lazily when required (e.g. see the
// method |manager()|) or add an Init() method.
}
SpeechInputDispatcherHost::~SpeechInputDispatcherHost() {
// If the renderer crashed for some reason or if we didn't receive a proper
// Cancel/Stop call for an existing session, cancel such active sessions now.
// We first check if this dispatcher received any speech IPC requst so that
// we don't end up creating the speech input manager for web pages which don't
// use speech input.
if (may_have_pending_requests_)
manager()->CancelAllRequestsWithDelegate(this);
}
SpeechInputManager* SpeechInputDispatcherHost::manager() {
if (manager_)
return manager_;
return content::GetContentClient()->browser()->GetSpeechInputManager();
}
bool SpeechInputDispatcherHost::OnMessageReceived(
const IPC::Message& message, bool* message_was_ok) {
DCHECK(BrowserThread::CurrentlyOn(BrowserThread::IO));
bool handled = true;
IPC_BEGIN_MESSAGE_MAP_EX(SpeechInputDispatcherHost, message,
*message_was_ok)
IPC_MESSAGE_HANDLER(SpeechInputHostMsg_StartRecognition,
OnStartRecognition)
IPC_MESSAGE_HANDLER(SpeechInputHostMsg_CancelRecognition,
OnCancelRecognition)
IPC_MESSAGE_HANDLER(SpeechInputHostMsg_StopRecording,
OnStopRecording)
IPC_MESSAGE_UNHANDLED(handled = false)
IPC_END_MESSAGE_MAP()
if (handled)
may_have_pending_requests_ = true;
return handled;
}
void SpeechInputDispatcherHost::OnStartRecognition(
const SpeechInputHostMsg_StartRecognition_Params ¶ms) {
int caller_id = g_speech_input_callers.Get().CreateId(
render_process_id_, params.render_view_id, params.request_id);
manager()->StartRecognition(this, caller_id,
render_process_id_,
params.render_view_id, params.element_rect,
params.language, params.grammar,
params.origin_url,
context_getter_.get(),
speech_input_preferences_.get());
}
void SpeechInputDispatcherHost::OnCancelRecognition(int render_view_id,
int request_id) {
int caller_id = g_speech_input_callers.Get().GetId(
render_process_id_, render_view_id, request_id);
if (caller_id) {
manager()->CancelRecognition(caller_id);
// Request sequence ended so remove mapping.
g_speech_input_callers.Get().RemoveId(caller_id);
}
}
void SpeechInputDispatcherHost::OnStopRecording(int render_view_id,
int request_id) {
int caller_id = g_speech_input_callers.Get().GetId(
render_process_id_, render_view_id, request_id);
if (caller_id)
manager()->StopRecording(caller_id);
}
void SpeechInputDispatcherHost::SetRecognitionResult(
int caller_id, const SpeechInputResultArray& result) {
VLOG(1) << "SpeechInputDispatcherHost::SetRecognitionResult enter";
DCHECK(BrowserThread::CurrentlyOn(BrowserThread::IO));
int caller_render_view_id =
g_speech_input_callers.Get().render_view_id(caller_id);
int caller_request_id = g_speech_input_callers.Get().request_id(caller_id);
Send(new SpeechInputMsg_SetRecognitionResult(caller_render_view_id,
caller_request_id,
result));
VLOG(1) << "SpeechInputDispatcherHost::SetRecognitionResult exit";
}
void SpeechInputDispatcherHost::DidCompleteRecording(int caller_id) {
VLOG(1) << "SpeechInputDispatcherHost::DidCompleteRecording enter";
DCHECK(BrowserThread::CurrentlyOn(BrowserThread::IO));
int caller_render_view_id =
g_speech_input_callers.Get().render_view_id(caller_id);
int caller_request_id = g_speech_input_callers.Get().request_id(caller_id);
Send(new SpeechInputMsg_RecordingComplete(caller_render_view_id,
caller_request_id));
VLOG(1) << "SpeechInputDispatcherHost::DidCompleteRecording exit";
}
void SpeechInputDispatcherHost::DidCompleteRecognition(int caller_id) {
VLOG(1) << "SpeechInputDispatcherHost::DidCompleteRecognition enter";
DCHECK(BrowserThread::CurrentlyOn(BrowserThread::IO));
int caller_render_view_id =
g_speech_input_callers.Get().render_view_id(caller_id);
int caller_request_id = g_speech_input_callers.Get().request_id(caller_id);
Send(new SpeechInputMsg_RecognitionComplete(caller_render_view_id,
caller_request_id));
// Request sequence ended, so remove mapping.
g_speech_input_callers.Get().RemoveId(caller_id);
VLOG(1) << "SpeechInputDispatcherHost::DidCompleteRecognition exit";
}
} // namespace speech_input
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