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/*
* Copyright (C) 2006, 2008, 2010 Apple Inc. All rights reserved.
* Copyright (C) 2010 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:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. 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.
*
* THIS SOFTWARE IS PROVIDED BY APPLE INC. ``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 APPLE INC. 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 "config.h"
#include "SpinButtonElement.h"
#include "Chrome.h"
#include "EventHandler.h"
#include "EventNames.h"
#include "Frame.h"
#include "HTMLNames.h"
#include "MouseEvent.h"
#include "Page.h"
#include "RenderBox.h"
#include "RenderTheme.h"
#include "ScrollbarTheme.h"
#include "WheelEvent.h"
#include <wtf/IsoMallocInlines.h>
#include <wtf/Ref.h>
namespace WebCore {
WTF_MAKE_ISO_ALLOCATED_IMPL(SpinButtonElement);
using namespace HTMLNames;
inline SpinButtonElement::SpinButtonElement(Document& document, SpinButtonOwner& spinButtonOwner)
: HTMLDivElement(divTag, document)
, m_spinButtonOwner(&spinButtonOwner)
, m_capturing(false)
, m_upDownState(Indeterminate)
, m_pressStartingState(Indeterminate)
, m_repeatingTimer(*this, &SpinButtonElement::repeatingTimerFired)
{
setHasCustomStyleResolveCallbacks();
setPseudo(AtomicString("-webkit-inner-spin-button", AtomicString::ConstructFromLiteral));
}
Ref<SpinButtonElement> SpinButtonElement::create(Document& document, SpinButtonOwner& spinButtonOwner)
{
return adoptRef(*new SpinButtonElement(document, spinButtonOwner));
}
void SpinButtonElement::willDetachRenderers()
{
releaseCapture();
}
void SpinButtonElement::defaultEventHandler(Event& event)
{
if (!is<MouseEvent>(event)) {
if (!event.defaultHandled())
HTMLDivElement::defaultEventHandler(event);
return;
}
RenderBox* box = renderBox();
if (!box) {
if (!event.defaultHandled())
HTMLDivElement::defaultEventHandler(event);
return;
}
if (!shouldRespondToMouseEvents()) {
if (!event.defaultHandled())
HTMLDivElement::defaultEventHandler(event);
return;
}
MouseEvent& mouseEvent = downcast<MouseEvent>(event);
IntPoint local = roundedIntPoint(box->absoluteToLocal(mouseEvent.absoluteLocation(), UseTransforms));
if (mouseEvent.type() == eventNames().mousedownEvent && mouseEvent.button() == LeftButton) {
if (box->borderBoxRect().contains(local)) {
// The following functions of HTMLInputElement may run JavaScript
// code which detaches this shadow node. We need to take a reference
// and check renderer() after such function calls.
Ref<SpinButtonElement> protectedThis(*this);
if (m_spinButtonOwner)
m_spinButtonOwner->focusAndSelectSpinButtonOwner();
if (renderer()) {
if (m_upDownState != Indeterminate) {
// A JavaScript event handler called in doStepAction() below
// might change the element state and we might need to
// cancel the repeating timer by the state change. If we
// started the timer after doStepAction(), we would have no
// chance to cancel the timer.
startRepeatingTimer();
doStepAction(m_upDownState == Up ? 1 : -1);
}
}
mouseEvent.setDefaultHandled();
}
} else if (mouseEvent.type() == eventNames().mouseupEvent && mouseEvent.button() == LeftButton)
stopRepeatingTimer();
else if (mouseEvent.type() == eventNames().mousemoveEvent) {
if (box->borderBoxRect().contains(local)) {
if (!m_capturing) {
if (RefPtr<Frame> frame = document().frame()) {
frame->eventHandler().setCapturingMouseEventsElement(this);
m_capturing = true;
if (Page* page = document().page())
page->chrome().registerPopupOpeningObserver(*this);
}
}
UpDownState oldUpDownState = m_upDownState;
switch (renderer()->theme().innerSpinButtonLayout(*renderer())) {
case RenderTheme::InnerSpinButtonLayout::Vertical:
m_upDownState = local.y() < box->height() / 2 ? Up : Down;
break;
case RenderTheme::InnerSpinButtonLayout::HorizontalUpLeft:
m_upDownState = local.x() < box->width() / 2 ? Up : Down;
break;
case RenderTheme::InnerSpinButtonLayout::HorizontalUpRight:
m_upDownState = local.x() > box->width() / 2 ? Up : Down;
break;
}
if (m_upDownState != oldUpDownState)
renderer()->repaint();
} else {
releaseCapture();
m_upDownState = Indeterminate;
}
}
if (!mouseEvent.defaultHandled())
HTMLDivElement::defaultEventHandler(mouseEvent);
}
void SpinButtonElement::willOpenPopup()
{
releaseCapture();
m_upDownState = Indeterminate;
}
void SpinButtonElement::forwardEvent(Event& event)
{
if (!renderBox())
return;
if (!is<WheelEvent>(event))
return;
if (!m_spinButtonOwner)
return;
if (!m_spinButtonOwner->shouldSpinButtonRespondToWheelEvents())
return;
doStepAction(downcast<WheelEvent>(event).wheelDeltaY());
event.setDefaultHandled();
}
bool SpinButtonElement::willRespondToMouseMoveEvents()
{
if (renderBox() && shouldRespondToMouseEvents())
return true;
return HTMLDivElement::willRespondToMouseMoveEvents();
}
bool SpinButtonElement::willRespondToMouseClickEvents()
{
if (renderBox() && shouldRespondToMouseEvents())
return true;
return HTMLDivElement::willRespondToMouseClickEvents();
}
void SpinButtonElement::doStepAction(int amount)
{
if (!m_spinButtonOwner)
return;
if (amount > 0)
m_spinButtonOwner->spinButtonStepUp();
else if (amount < 0)
m_spinButtonOwner->spinButtonStepDown();
}
void SpinButtonElement::releaseCapture()
{
stopRepeatingTimer();
if (m_capturing) {
if (RefPtr<Frame> frame = document().frame()) {
frame->eventHandler().setCapturingMouseEventsElement(nullptr);
m_capturing = false;
if (Page* page = document().page())
page->chrome().unregisterPopupOpeningObserver(*this);
}
}
}
bool SpinButtonElement::matchesReadWritePseudoClass() const
{
return shadowHost()->matchesReadWritePseudoClass();
}
void SpinButtonElement::startRepeatingTimer()
{
m_pressStartingState = m_upDownState;
ScrollbarTheme& theme = ScrollbarTheme::theme();
m_repeatingTimer.start(theme.initialAutoscrollTimerDelay(), theme.autoscrollTimerDelay());
}
void SpinButtonElement::stopRepeatingTimer()
{
m_repeatingTimer.stop();
}
void SpinButtonElement::step(int amount)
{
if (!shouldRespondToMouseEvents())
return;
// On Mac OS, NSStepper updates the value for the button under the mouse
// cursor regardless of the button pressed at the beginning. So the
// following check is not needed for Mac OS.
#if !OS(MAC_OS_X)
if (m_upDownState != m_pressStartingState)
return;
#endif
doStepAction(amount);
}
void SpinButtonElement::repeatingTimerFired()
{
if (m_upDownState != Indeterminate)
step(m_upDownState == Up ? 1 : -1);
}
void SpinButtonElement::setHovered(bool flag)
{
if (!flag)
m_upDownState = Indeterminate;
HTMLDivElement::setHovered(flag);
}
bool SpinButtonElement::shouldRespondToMouseEvents()
{
return !m_spinButtonOwner || m_spinButtonOwner->shouldSpinButtonRespondToMouseEvents();
}
}