/*

* Copyright (c) 2006-2008 Nokia Corporation and/or its subsidiary(-ies).

* All rights reserved.

* This component and the accompanying materials are made available

* under the terms of the License "Eclipse Public License v1.0"

* which accompanies this distribution, and is available

* at the URL "http://www.eclipse.org/legal/epl-v10.html".

*

* Initial Contributors:

* Nokia Corporation - initial contribution.

*

* Contributors:

*

* Description:   

*

*/

#include <browser_platform_variant.hrh>

#include "config.h"

#include "../../bidi.h"

#include <AknUtils.h>

#ifdef BRDO_TOUCH_ENABLED_FF

#include <touchfeedback.h>

#endif // BRDO_TOUCH_ENABLED_FF

#include "brctl.h"

#include "WebPointerEventHandler.h"

#include "WebView.h"

#include "WebFrame.h"

#include "WebFrameView.h"

#include "WebCursor.h"

#include "WebPopupDrawer.h"

#include "WebFormFillPopup.h"

#include "WebPageScrollHandler.h"

#include "WebFepTextEditor.h"

#include "WebCoreFrameBridge.h"

#include "StaticObjectsContainer.h"

#include "PluginSkin.h"

#include "WebUtil.h"

#include "Element.h"

#include "Document.h"

#include "Frame.h"

#include "FrameView.h"

#include "EventHandler.h"

#include "EventNames.h"

#include "HitTestResult.h"

#include "HitTestRequest.h"

#include "MouseEvent.h"

#include "WebPageFullScreenHandler.h"

#include "PluginSkin.h"

#include "PluginWin.h"

#include "WebFrameBridge.h"

#include "Page.h"

#include "Chrome.h"

#include "ChromeClient.h"

#include "FocusController.h"

#include "WebTabbedNavigation.h"

#include "SettingsContainer.h"

#include "PluginHandler.h"

#include "WebCoreGraphicsContext.h"

#include "GraphicsContext.h"

#include "RenderStyle.h"

#include "RenderObject.h"

#include "CSSStyleSelector.h"

#include "CSSValueKeywords.h"

#include "Settings.h"

#include "WebKitLogger.h"

using namespace WebCore;

using namespace EventNames;

using namespace RT_GestureHelper;

static const int KMinScrollAndTapInterval = 200000;				// 200 ms

static const int KDoubleTapMinActivationInterval = 100000;     // 100 ms

static const int KDoubleTapMaxActivationInterval = 500000;     // 500 ms

static const int KDoubleTapIdleInterval = 700000;			// 700 ms, to prevent triple-tap effects

#define IS_NAVIGATION_NONE      (m_webview->brCtl()->settings()->getNavigationType() == SettingsContainer::NavigationTypeNone)

#define IS_TABBED_NAVIGATION    (m_webview->brCtl()->settings()->getNavigationType() == SettingsContainer::NavigationTypeTabbed)

//-----------------------------------------------------------------------------

// WebPointerEventHandler::NewL

//-----------------------------------------------------------------------------

WebPointerEventHandler* WebPointerEventHandler::NewL(WebView* view)

{

    WebPointerEventHandler* self = new (ELeave) WebPointerEventHandler(view);

    CleanupStack::PushL( self );

    self->ConstructL();

    CleanupStack::Pop();

    return self;

}

//-----------------------------------------------------------------------------

// WebPointerEventHandler::WebPointerEventHandler

//-----------------------------------------------------------------------------

WebPointerEventHandler::WebPointerEventHandler(WebView* view)

    : m_webview(view),

      m_isHighlighted(false),

      m_highlightedNode(NULL),

      m_buttonDownTimer( this, &WebPointerEventHandler::buttonDownTimerCB ),

      m_ignoreTap(false)

{

}

//-----------------------------------------------------------------------------

// WebPointerEventHandler::~WebPointerEventHandler

//-----------------------------------------------------------------------------

WebPointerEventHandler::~WebPointerEventHandler()

{

    delete m_gestureHelper;

    delete m_waiter;

}

//-----------------------------------------------------------------------------

// WebPointerEventHandler::ConstructL

//-----------------------------------------------------------------------------

void WebPointerEventHandler::ConstructL()

{

#ifdef BRDO_USE_GESTURE_HELPER  

  m_gestureHelper = CGestureHelper::NewL( *this );

  m_gestureHelper->SetDoubleTapEnabled(true);

  m_gestureHelper->SetHoldingEnabled(false);

#else

  m_gestureHelper = NULL;

#endif  

  m_waiter = new(ELeave) CActiveSchedulerWait();

}

/**

 * EGestureStart is sent on touch down

 * EGestureReleased is sent on touch up

 * EGestureTap = touch down + touch up - events sent: EGestureStart, EGestureTap

 *                EGestureReleased

 * EGestureDrag = touch down + "move" - events sent: EGestureStart, EGestureDrag

 * EGestureDoubleTap = 2 * (touch down + touch up) - events sent EGestureStart, 

 *                     EGestureDoubleTap, EGestureReleased

 * EGestureLongTap = touch down + "long touch" - events sent: EGestureStart, 

 *                   EGestureLongTap

 * EGestureSwipe<Up/Down/Left/Right> - drag + touch up, where movements is

 *                   close to particular direction - event sent: EGestureSwipe, 

 *                   EGestureReleased

 * EGestureFlick - "fast" drag + touch up - events sent: EGestureFlick, 

 *                  EGestureReleased

 * EGestureDrop -  drag + touch up, !(EGestureSwipe || EGestureFlick) - events

 *                 sent: EGestureDrop, EGestureReleased

 */

void WebPointerEventHandler::HandleGestureL( const TGestureEvent& aEvent )

{

    TGestureCode gtype = aEvent.Code(EAxisBoth);

    TBrCtlDefs::TBrCtlElementType elType = m_webview->focusedElementType();

    PluginSkin* plugin = m_webview->mainFrame()->focusedPlugin();

    if (plugin && plugin->pluginWin()) {

      if (plugin->pluginWin()->HandleGesture(aEvent)) {

          return;

      }

    }

    updateCursor(aEvent.CurrentPos());

    if (IS_TABBED_NAVIGATION) {

        m_webview->tabbedNavigation()->updateCursorPosition(aEvent.CurrentPos());

    }

    switch (gtype) {

      // sent on touch down

      case EGestureStart:  

      {

          if (m_webview->viewIsScrolling()) {

              m_ignoreTap = true;

              m_webview->pageScrollHandler()->handleTouchDownGH(aEvent);

          }

          else {

              handleTouchDownL(aEvent);   

          }

          break;

      }

      // sent on tap

      case EGestureTap:

      {

          if (!m_ignoreTap) {

              handleTapL(aEvent);

          }

          break;    

      }

      // sent on double tap

      case EGestureDoubleTap:

      {

          handleDoubleTap(aEvent);

          break;    

      }

      // sent on long tap

      case EGestureLongTap:

      {

          break;    

      }

      // sent on touch up after drag

      case EGestureDrop:

      case EGestureFlick:

      case EGestureSwipeLeft:

      case EGestureSwipeRight:

      case EGestureSwipeUp:

      case EGestureSwipeDown:

      {

          m_ignoreTap = false;

          if (!IS_NAVIGATION_NONE) {

              handleTouchUp(aEvent);

          }

          else {

              Frame* frm = m_webview->page()->focusController()->focusedOrMainFrame();

              m_webview->sendMouseEventToEngine(TPointerEvent::EButton1Up, m_highlightPos, frm);

          }

          break;    

      }

      // sent on move

      case EGestureDrag:

      {

          handleMove(aEvent);

          break;    

      }

      // sent on touch up after tap double tap and long tap

      case EGestureReleased:

      {

          m_ignoreTap = false;

          handleTouchUp(aEvent);      

          break;    

      }

    }

}

// ======================================================================

// WebPointerEventHandler::handleTap

// ======================================================================

void WebPointerEventHandler::handleTapL(const TGestureEvent& aEvent)

{

    m_buttonDownTimer.stop();

    m_lastTapEvent = m_currentEvent; 

    if(!m_webview->inPageViewMode()){

    	doTapL();

    }

}

// ======================================================================

//  WebPointerEventHandler::handleDoubleTap

//======================================================================

void WebPointerEventHandler::handleDoubleTap(const TGestureEvent& aEvent)

{

    if ( !m_webview->viewIsScrolling() &&

         (m_webview->brCtl()->capabilities() & TBrCtlDefs::ECapabilityFitToScreen)) {

        if (m_isHighlighted){

            dehighlight();                

        }

        m_webview->setZoomLevelAdaptively();

    }

    else {

        m_webview->resetLastZoomLevelIfNeeded();

    }

}

// ======================================================================

// WebPointerEventHandler::handleTouchDownL

//======================================================================

void WebPointerEventHandler::handleTouchDownL(const TGestureEvent& aEvent)

{

    TBrCtlDefs::TBrCtlElementType elType = m_webview->focusedElementType();

    PluginHandler* pluginHandler = WebCore::StaticObjectsContainer::instance()->pluginHandler();

    PluginSkin* pluginToActivate = pluginHandler->pluginToActivate();

    m_buttonDownEvent = m_currentEvent;

    if ( !m_buttonDownTimer.isActive() && !m_webview->inPageViewMode()){

        m_buttonDownTimer.startOneShot(0.1f);        

    }

    if (!IS_NAVIGATION_NONE) {

        m_webview->pageScrollHandler()->handleTouchDownGH(aEvent);

    }

    if ( TBrCtlDefs::EElementActivatedObjectBox == elType) {

        PluginSkin* plugin = m_webview->mainFrame()->focusedPlugin();

        if (plugin && plugin->pluginWin()) {

            if (!plugin->getClipRect().Contains(m_buttonDownEvent.iPosition)) {

                plugin->deActivate();

            }

            else {

                plugin->pluginWin()->HandlePointerEventL(m_buttonDownEvent);

            }

        }

    }

    /*

     * After introducing "link selection" pointer down action is done in 

     * buttondown timer callback. When "down" gesture event is arrived we start 

     * timer end exit, so gesture helper is ready to deliver next gesture event. 

     * Meanwhile the processing of the first gesture event hasn't been finished yet. 

     * The gesture helper doesn't "know" about our plans to handle the event inside 

     * timer callback and only way for us to "tell" about this is to stop RunL() 

     * of CGestureEventSender (HandleGestureL() is inside it) and finish buttondown 

     * timer callback first.  

     */    

    if ( m_buttonDownTimer.isActive()){

        m_waiter->Start();	

    }

}

// ======================================================================

// WebPointerEventHandler::handleTouchUp 

// ======================================================================

void WebPointerEventHandler::handleTouchUp(const TGestureEvent& aEvent)

{

    m_highlightPos = TPoint(-1,-1);

    m_highlightedNode = NULL;

    PluginHandler* pluginHandler = WebCore::StaticObjectsContainer::instance()->pluginHandler();

    pluginHandler->setPluginToActivate(NULL);

    if (!IS_NAVIGATION_NONE) {

        m_webview->pageScrollHandler()->handleTouchUpGH(aEvent);

    }

}

// ======================================================================

// WebPointerEventHandler::handleMoveL

// ======================================================================

void WebPointerEventHandler::handleMove(const TGestureEvent& aEvent)

{

    TBrCtlDefs::TBrCtlElementType elType = m_webview->focusedElementType();

    TPoint curPos = aEvent.CurrentPos();

    PluginHandler* pluginHandler = WebCore::StaticObjectsContainer::instance()->pluginHandler();

    pluginHandler->setPluginToActivate(NULL);

    m_buttonDownTimer.stop();

    if (IS_NAVIGATION_NONE) {

        Frame* frm = m_webview->page()->focusController()->focusedOrMainFrame();

        m_webview->sendMouseEventToEngine(TPointerEvent::EMove, curPos, frm);

    }

    else {

    HandleHighlightChange(curPos);

    m_webview->pageScrollHandler()->handleScrollingGH(aEvent);

    }

}

// ======================================================================

// WebPointerEventHandler::HandlePointerEventL

// ======================================================================

void WebPointerEventHandler::HandlePointerEventL(const TPointerEvent& aPointerEvent)

{

    m_currentEvent = aPointerEvent;

    if (m_webview->isSynchRequestPending()) { 

       return;

    }

    // Handle graphical history - should never happen, as HistoryView handles this event by itself

    if ( m_webview->brCtl()->historyHandler()->historyController()->historyView()) {

        return;

    }

    // Handle FormFill popup

    if (m_webview->formFillPopup() && m_webview->formFillPopup()->IsVisible()) {

        m_webview->formFillPopup()->HandlePointerEventL(aPointerEvent);

        return;

    }

    if (!m_webview->inPageViewMode()) {

        if (aPointerEvent.iType == TPointerEvent::EButton1Down) {

            m_webview->GetContainerWindow().EnablePointerMoveBuffer();

        }

        else if (aPointerEvent.iType == TPointerEvent::EButton1Up) {

            m_webview->GetContainerWindow().DisablePointerMoveBuffer();

        }

    }

#ifdef BRDO_USE_GESTURE_HELPER

    m_gestureHelper->HandlePointerEventL(aPointerEvent);

#endif    

}

//-----------------------------------------------------------------------------

// WebPointerEventHandler::HandleHighlightChange

//-----------------------------------------------------------------------------

void WebPointerEventHandler::HandleHighlightChange(const TPoint &aPoint)

{

    if (!m_highlightedNode || !m_isHighlighted)    return;

    if (!canDehighlight(aPoint)) return;

    dehighlight();

}

//-----------------------------------------------------------------------------

// WebPointerEventHandler::checkForEventListener

//-----------------------------------------------------------------------------

bool WebPointerEventHandler::checkForEventListener(WebCore::Node* node)

{

    EventTargetNode* etnfound = NULL;

    for (Node* np = node; np; np = np->parentNode()) {

        //check for a mouseover event listener

        if (np->isEventTargetNode()) {

            if (m_webview->page()->chrome()->client()->elementVisibilityChanged()) {

                return true;

            }

        }

    }

    return false;

}

//-----------------------------------------------------------------------------

// WebPointerEventHandler::highlitableElement

//-----------------------------------------------------------------------------

TBrCtlDefs::TBrCtlElementType WebPointerEventHandler::highlitableElement()

{

    TRect elRect;

    TBrCtlDefs::TBrCtlElementType elType = TBrCtlDefs::EElementNone;

    Frame* coreFrame = core(m_webview->mainFrame());

    WebCursor* cursor = StaticObjectsContainer::instance()->webCursor();

    TPointerEvent event;

    TPoint pos = cursor->position();

    WebFrame* wfrm = cursor->getFrameAtPoint(pos);

    Frame* frm = core(wfrm);

    TPoint pt(wfrm->frameView()->viewCoordsInFrameCoords(pos));

    TPoint nodePoint;

    m_highlightedNode = NULL;

    Node* retNode = 0;

    frm->bridge()->getTypeFromElement(eventNode, elType, elRect, retNode);

    if (elType == TBrCtlDefs::EElementNone) {

        Node* n = wfrm->getClosestAnchorElement(cursor->position(), pos);

        if (n) {          

            wfrm = cursor->getFrameAtPoint(pos);

            frm = core(wfrm);

            eventNode = frm->document()->elementFromPoint(pos.iX, pos.iY);

            frm->bridge()->getTypeFromElement(eventNode, elType, elRect, retNode);

            TPoint nodePoint = n->getRect().Rect().Center();

            m_offset = (pt.iX- nodePoint.iX)*(pt.iX- nodePoint.iX) +

                       (pt.iY- nodePoint.iY)*(pt.iY- nodePoint.iY);

        }

    }

    m_highlightedNode = eventNode;

    if (m_highlightedNode) {

        m_highlightPos = pos;

        m_buttonDownEvent.iPosition = m_highlightPos;

    }

    m_webview->setFocusedElementType(elType);

    return elType;

}

// ======================================================================

// WebPointerEventHandler::isHighlitableElement

// ======================================================================

bool WebPointerEventHandler::isHighlitableElement(TBrCtlDefs::TBrCtlElementType& elType)

{

    return (elType == TBrCtlDefs::EElementAnchor

                    || elType == TBrCtlDefs::EElementInputBox

                    || elType == TBrCtlDefs::EElementActivatedInputBox

                    || elType == TBrCtlDefs::EElementButton

                    || elType == TBrCtlDefs::EElementCheckBoxChecked

                    || elType == TBrCtlDefs::EElementCheckBoxUnChecked

                    || elType == TBrCtlDefs::EElementTextAreaBox

                    || elType == TBrCtlDefs::EElementRadioButtonSelected

                    || elType == TBrCtlDefs::EElementRadioButtonUnSelected

                    || elType == TBrCtlDefs::EElementTelAnchor

                    || elType == TBrCtlDefs::EElementMailtoAnchor

                    || elType == TBrCtlDefs::EElementSmartLinkTel

                    || elType == TBrCtlDefs::EElementSmartLinkEmail

                    || elType == TBrCtlDefs::EElementSmartLinkVoip);

}

//-----------------------------------------------------------------------------

// WebPointerEventHandler::doTapL

//-----------------------------------------------------------------------------

void WebPointerEventHandler::doTapL()

{

    TBrCtlDefs::TBrCtlElementType elType = m_webview->focusedElementType();

    Frame* coreFrame = core(m_webview->mainFrame());

#ifdef BRDO_TOUCH_ENABLED_FF

    if (m_isHighlighted)

    {

        MTouchFeedback* feedback = MTouchFeedback::Instance();

        if (feedback)

           {

           feedback->InstantFeedback(ETouchFeedbackBasic);

           }

    }

#endif // BRDO_TOUCH_ENABLED_FF

    if (!IS_NAVIGATION_NONE) {

         m_webview->sendMouseEventToEngine(TPointerEvent::EMove, m_highlightPos, coreFrame);

     }

     /*

      * We assume that if element visibility has been changed  

      * between "up" and "down" that means that some node event 

      * listener (onMouseOver etc) handling happened and we don't 

      * want to send a click (mouse press + mouse release) event.

      * The exception is editable element, since we want VKB anyway

      */

     if (!IS_NAVIGATION_NONE &&

         elType != TBrCtlDefs::EElementActivatedInputBox && 

         elType != TBrCtlDefs::EElementTextAreaBox &&     

         m_webview->page()->chrome()->client()->elementVisibilityChangedByMouse()) {

         return;

     }