/*

 * Copyright (C) 2006, 2007, 2008 Apple Inc. All rights reserved.

 * Copyright (C) 2008 Google Inc.

 *

 * 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 COMPUTER, 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 COMPUTER, 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 "EventHandler.h"

#include "ChromiumDataObject.h"

#include "ClipboardChromium.h"

#include "Cursor.h"

#include "FloatPoint.h"

#include "FocusController.h"

#include "FrameView.h"

#include "Frame.h"

#include "HitTestRequest.h"

#include "HitTestResult.h"

#include "MouseEventWithHitTestResults.h"

#include "NotImplemented.h"

#include "Page.h"

#include "PlatformKeyboardEvent.h"

#include "PlatformWheelEvent.h"

#include "RenderWidget.h"

#include "SelectionController.h"

namespace WebCore {

#if OS(DARWIN)

const double EventHandler::TextDragDelay = 0.15;

#else

const double EventHandler::TextDragDelay = 0.0;

#endif

bool EventHandler::passMousePressEventToSubframe(MouseEventWithHitTestResults& mev, Frame* subframe)

{

    // If we're clicking into a frame that is selected, the frame will appear

    // greyed out even though we're clicking on the selection.  This looks

    // really strange (having the whole frame be greyed out), so we deselect the

    // selection.

    IntPoint p = m_frame->view()->windowToContents(mev.event().pos());

    if (m_frame->selection()->contains(p)) {

        VisiblePosition visiblePos(

            mev.targetNode()->renderer()->positionForPoint(mev.localPoint()));

        VisibleSelection newSelection(visiblePos);

        if (m_frame->shouldChangeSelection(newSelection))

            m_frame->selection()->setSelection(newSelection);

    }

    subframe->eventHandler()->handleMousePressEvent(mev.event());

    return true;

}

bool EventHandler::passMouseMoveEventToSubframe(MouseEventWithHitTestResults& mev, Frame* subframe, HitTestResult* hoveredNode)

{

    if (m_mouseDownMayStartDrag && !m_mouseDownWasInSubframe)

        return false;

    subframe->eventHandler()->handleMouseMoveEvent(mev.event(), hoveredNode);

    return true;

}

bool EventHandler::passMouseReleaseEventToSubframe(MouseEventWithHitTestResults& mev, Frame* subframe)

{

    subframe->eventHandler()->handleMouseReleaseEvent(mev.event());

    return true;

}

bool EventHandler::passWheelEventToWidget(PlatformWheelEvent& wheelEvent, Widget* widget)

{

    // We can sometimes get a null widget!  EventHandlerMac handles a null

    // widget by returning false, so we do the same.

    if (!widget)

        return false;

    // If not a FrameView, then probably a plugin widget.  Those will receive

    // the event via an EventTargetNode dispatch when this returns false.

    if (!widget->isFrameView())

        return false;

    return static_cast<FrameView*>(widget)->frame()->eventHandler()->handleWheelEvent(wheelEvent);

}

bool EventHandler::passWidgetMouseDownEventToWidget(const MouseEventWithHitTestResults& event)

{

    // Figure out which view to send the event to.

    if (!event.targetNode() || !event.targetNode()->renderer() || !event.targetNode()->renderer()->isWidget())

        return false;

    return passMouseDownEventToWidget(toRenderWidget(event.targetNode()->renderer())->widget());

}

bool EventHandler::passMouseDownEventToWidget(Widget* widget)

{

    notImplemented();

    return false;

}

bool EventHandler::tabsToAllControls(KeyboardEvent*) const

{

    return true;

}

bool EventHandler::eventActivatedView(const PlatformMouseEvent& event) const

{

    // FIXME: EventHandlerWin.cpp does the following:

    // return event.activatedWebView();

    return false;

}

PassRefPtr<Clipboard> EventHandler::createDraggingClipboard() const

{

    RefPtr<ChromiumDataObject> dataObject = ChromiumDataObject::create();

    return ClipboardChromium::create(true, dataObject.get(), ClipboardWritable);

}

void EventHandler::focusDocumentView()

{

    Page* page = m_frame->page();

    if (!page)

        return;

    page->focusController()->setFocusedFrame(m_frame);

}

bool EventHandler::passWidgetMouseDownEventToWidget(RenderWidget* renderWidget)

{

    return passMouseDownEventToWidget(renderWidget->widget());

}

unsigned EventHandler::accessKeyModifiers()

{

#if OS(DARWIN)

    return PlatformKeyboardEvent::CtrlKey | PlatformKeyboardEvent::AltKey;

#else

    return PlatformKeyboardEvent::AltKey;

#endif

}

#if OS(LINUX)

// GTK+ must scroll horizontally if the mouse pointer is on top of the

// horizontal scrollbar while scrolling with the wheel.

// This code comes from gtk/EventHandlerGtk.cpp.

bool EventHandler::shouldTurnVerticalTicksIntoHorizontal(const HitTestResult& result) const

{

    return result.scrollbar() && result.scrollbar()->orientation() == HorizontalScrollbar;

}

#endif

} // namespace WebCore