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/*
* Copyright (C) 2013 Google Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the following disclaimer
* in the documentation and/or other materials provided with the
* distribution.
* * Neither the name of Google Inc. nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "modules/webmidi/MIDIPort.h"
#include "bindings/core/v8/ScriptPromise.h"
#include "core/dom/DOMException.h"
#include "modules/webmidi/MIDIAccess.h"
#include "modules/webmidi/MIDIConnectionEvent.h"
using midi::mojom::PortState;
namespace blink {
MIDIPort::MIDIPort(MIDIAccess* access,
const String& id,
const String& manufacturer,
const String& name,
TypeCode type,
const String& version,
PortState state)
: ContextLifecycleObserver(access->getExecutionContext()),
m_id(id),
m_manufacturer(manufacturer),
m_name(name),
m_type(type),
m_version(version),
m_access(this, access),
m_connection(ConnectionStateClosed) {
DCHECK(access);
DCHECK(type == TypeInput || type == TypeOutput);
DCHECK(state == PortState::DISCONNECTED || state == PortState::CONNECTED);
m_state = state;
}
String MIDIPort::connection() const {
switch (m_connection) {
case ConnectionStateOpen:
return "open";
case ConnectionStateClosed:
return "closed";
case ConnectionStatePending:
return "pending";
}
return emptyString();
}
String MIDIPort::state() const {
switch (m_state) {
case PortState::DISCONNECTED:
return "disconnected";
case PortState::CONNECTED:
return "connected";
case PortState::OPENED:
NOTREACHED();
return "connected";
}
return emptyString();
}
String MIDIPort::type() const {
switch (m_type) {
case TypeInput:
return "input";
case TypeOutput:
return "output";
}
return emptyString();
}
ScriptPromise MIDIPort::open(ScriptState* scriptState) {
open();
return accept(scriptState);
}
ScriptPromise MIDIPort::close(ScriptState* scriptState) {
if (m_connection != ConnectionStateClosed) {
// TODO(toyoshim): Do clear() operation on MIDIOutput.
// TODO(toyoshim): Add blink API to perform a real close operation.
setStates(m_state, ConnectionStateClosed);
}
return accept(scriptState);
}
void MIDIPort::setState(PortState state) {
switch (state) {
case PortState::DISCONNECTED:
switch (m_connection) {
case ConnectionStateOpen:
case ConnectionStatePending:
setStates(PortState::DISCONNECTED, ConnectionStatePending);
break;
case ConnectionStateClosed:
// Will do nothing.
setStates(PortState::DISCONNECTED, ConnectionStateClosed);
break;
}
break;
case PortState::CONNECTED:
switch (m_connection) {
case ConnectionStateOpen:
NOTREACHED();
break;
case ConnectionStatePending:
// We do not use |setStates| in order not to dispatch events twice.
// |open| calls |setStates|.
m_state = PortState::CONNECTED;
open();
break;
case ConnectionStateClosed:
setStates(PortState::CONNECTED, ConnectionStateClosed);
break;
}
break;
case PortState::OPENED:
NOTREACHED();
break;
}
}
ExecutionContext* MIDIPort::getExecutionContext() const {
return m_access->getExecutionContext();
}
bool MIDIPort::hasPendingActivity() const {
// MIDIPort should survive if ConnectionState is "open" or can be "open" via
// a MIDIConnectionEvent even if there are no references from JavaScript.
return m_connection != ConnectionStateClosed;
}
void MIDIPort::contextDestroyed(ExecutionContext*) {
// Should be "closed" to assume there are no pending activities.
m_connection = ConnectionStateClosed;
}
DEFINE_TRACE(MIDIPort) {
visitor->trace(m_access);
EventTargetWithInlineData::trace(visitor);
ContextLifecycleObserver::trace(visitor);
}
DEFINE_TRACE_WRAPPERS(MIDIPort) {
visitor->traceWrappers(m_access);
EventTargetWithInlineData::traceWrappers(visitor);
}
void MIDIPort::open() {
switch (m_state) {
case PortState::DISCONNECTED:
setStates(m_state, ConnectionStatePending);
break;
case PortState::CONNECTED:
// TODO(toyoshim): Add blink API to perform a real open and close
// operation.
setStates(m_state, ConnectionStateOpen);
break;
case PortState::OPENED:
NOTREACHED();
break;
}
}
ScriptPromise MIDIPort::accept(ScriptState* scriptState) {
return ScriptPromise::cast(
scriptState,
ToV8(this, scriptState->context()->Global(), scriptState->isolate()));
}
ScriptPromise MIDIPort::reject(ScriptState* scriptState,
ExceptionCode ec,
const String& message) {
return ScriptPromise::rejectWithDOMException(
scriptState, DOMException::create(ec, message));
}
void MIDIPort::setStates(PortState state, ConnectionState connection) {
DCHECK(state != PortState::DISCONNECTED || connection != ConnectionStateOpen);
if (m_state == state && m_connection == connection)
return;
m_state = state;
m_connection = connection;
dispatchEvent(MIDIConnectionEvent::create(this));
m_access->dispatchEvent(MIDIConnectionEvent::create(this));
}
} // namespace blink
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