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/*
* Copyright (C) 2012 Samsung Electronics
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public License
* along with this library; see the file COPYING.LIB. If not, write to
* the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
* Boston, MA 02110-1301, USA.
*/
#include "modules/vibration/VibrationController.h"
#include "bindings/modules/v8/UnsignedLongOrUnsignedLongSequence.h"
#include "core/dom/Document.h"
#include "core/frame/Navigator.h"
#include "core/page/Page.h"
#include "platform/mojo/MojoHelper.h"
#include "public/platform/InterfaceProvider.h"
// Maximum number of entries in a vibration pattern.
const unsigned kVibrationPatternLengthMax = 99;
// Maximum duration of a vibration is 10 seconds.
const unsigned kVibrationDurationMsMax = 10000;
blink::VibrationController::VibrationPattern sanitizeVibrationPatternInternal(
const blink::VibrationController::VibrationPattern& pattern) {
blink::VibrationController::VibrationPattern sanitized = pattern;
size_t length = sanitized.size();
// If the pattern is too long then truncate it.
if (length > kVibrationPatternLengthMax) {
sanitized.shrink(kVibrationPatternLengthMax);
length = kVibrationPatternLengthMax;
}
// If any pattern entry is too long then truncate it.
for (size_t i = 0; i < length; ++i) {
if (sanitized[i] > kVibrationDurationMsMax)
sanitized[i] = kVibrationDurationMsMax;
}
// If the last item in the pattern is a pause then discard it.
if (length && !(length % 2))
sanitized.pop_back();
return sanitized;
}
namespace blink {
// static
VibrationController::VibrationPattern
VibrationController::sanitizeVibrationPattern(
const UnsignedLongOrUnsignedLongSequence& pattern) {
VibrationPattern sanitized;
if (pattern.isUnsignedLong())
sanitized.push_back(pattern.getAsUnsignedLong());
else if (pattern.isUnsignedLongSequence())
sanitized = pattern.getAsUnsignedLongSequence();
return sanitizeVibrationPatternInternal(sanitized);
}
VibrationController::VibrationController(Document& document)
: ContextLifecycleObserver(&document),
PageVisibilityObserver(document.page()),
m_timerDoVibrate(this, &VibrationController::doVibrate),
m_isRunning(false),
m_isCallingCancel(false),
m_isCallingVibrate(false) {
document.frame()->interfaceProvider()->getInterface(
mojo::MakeRequest(&m_service));
}
VibrationController::~VibrationController() {}
bool VibrationController::vibrate(const VibrationPattern& pattern) {
// Cancel clears the stored pattern and cancels any ongoing vibration.
cancel();
m_pattern = sanitizeVibrationPatternInternal(pattern);
if (!m_pattern.size())
return true;
if (m_pattern.size() == 1 && !m_pattern[0]) {
m_pattern.clear();
return true;
}
m_isRunning = true;
// This may be a bit racy with |didCancel| being called as a mojo callback,
// it also starts the timer. This is not a problem as calling |startOneShot|
// repeatedly will just update the time at which to run |doVibrate|, it will
// not be called more than once.
m_timerDoVibrate.startOneShot(0, BLINK_FROM_HERE);
return true;
}
void VibrationController::doVibrate(TimerBase* timer) {
DCHECK(timer == &m_timerDoVibrate);
if (m_pattern.isEmpty())
m_isRunning = false;
if (!m_isRunning || m_isCallingCancel || m_isCallingVibrate ||
!getExecutionContext() || !page()->isPageVisible())
return;
if (m_service) {
m_isCallingVibrate = true;
m_service->Vibrate(m_pattern[0], convertToBaseCallback(WTF::bind(
&VibrationController::didVibrate,
wrapPersistent(this))));
}
}
void VibrationController::didVibrate() {
m_isCallingVibrate = false;
// If the pattern is empty here, it was probably cleared by a fresh call to
// |vibrate| while the mojo call was in flight.
if (m_pattern.isEmpty())
return;
// Use the current vibration entry of the pattern as the initial interval.
unsigned interval = m_pattern[0];
m_pattern.remove(0);
// If there is another entry it is for a pause.
if (!m_pattern.isEmpty()) {
interval += m_pattern[0];
m_pattern.remove(0);
}
m_timerDoVibrate.startOneShot(interval / 1000.0, BLINK_FROM_HERE);
}
void VibrationController::cancel() {
m_pattern.clear();
m_timerDoVibrate.stop();
if (m_isRunning && !m_isCallingCancel && m_service) {
m_isCallingCancel = true;
m_service->Cancel(convertToBaseCallback(
WTF::bind(&VibrationController::didCancel, wrapPersistent(this))));
}
m_isRunning = false;
}
void VibrationController::didCancel() {
m_isCallingCancel = false;
// A new vibration pattern may have been set while the mojo call for
// |cancel| was in flight, so kick the timer to let |doVibrate| process the
// pattern.
m_timerDoVibrate.startOneShot(0, BLINK_FROM_HERE);
}
void VibrationController::contextDestroyed(ExecutionContext*) {
cancel();
// If the document context was destroyed, never call the mojo service again.
m_service.reset();
}
void VibrationController::pageVisibilityChanged() {
if (!page()->isPageVisible())
cancel();
}
DEFINE_TRACE(VibrationController) {
ContextLifecycleObserver::trace(visitor);
PageVisibilityObserver::trace(visitor);
}
} // namespace blink
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