1 /*

     2  * Copyright 2009, The Android Open Source Project

     3  * Copyright (C) 2006 Zack Rusin <zack@kde.org>

     4  *

     5  * Redistribution and use in source and binary forms, with or without

     6  * modification, are permitted provided that the following conditions

     7  * are met:

     8  * 1. Redistributions of source code must retain the above copyright

     9  *    notice, this list of conditions and the following disclaimer.

    10  * 2. Redistributions in binary form must reproduce the above copyright

    11  *    notice, this list of conditions and the following disclaimer in the

    12  *    documentation and/or other materials provided with the distribution.

    13  *

    14  * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY

    15  * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE

    16  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR

    17  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE COMPUTER, INC. OR

    18  * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,

    19  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,

    20  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR

    21  * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY

    22  * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT

    23  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE

    24  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 

    25  */

    26 #define LOG_TAG "WebCore"

    27 

    28 #include "config.h"

    29 #include "EventHandler.h"

    30 

    31 #include "FocusController.h"

    32 #include "Frame.h"

    33 #include "KeyboardEvent.h"

    34 #include "MouseEventWithHitTestResults.h"

    35 #include "Page.h"

    36 #include "PlatformKeyboardEvent.h"

    37 #include "PlatformWheelEvent.h"

    38 #include "RenderWidget.h"

    39 

    40 namespace WebCore {

    41 

    42 bool EventHandler::tabsToAllControls(KeyboardEvent*) const

    43 {

    44     return true;

    45 }

    46 

    47 void EventHandler::focusDocumentView()

    48 {

    49     if (Page* page = m_frame->page())

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

    51 }

    52 

    53 bool EventHandler::passWidgetMouseDownEventToWidget(const MouseEventWithHitTestResults& event)

    54 {

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

    56     RenderObject* target = event.targetNode() ? event.targetNode()->renderer() : 0;

    57     if (!target || !target->isWidget())

    58         return false;

    59     return passMouseDownEventToWidget(toRenderWidget(target)->widget());

    60 }

    61 

    62 bool EventHandler::passWidgetMouseDownEventToWidget(RenderWidget* renderWidget)

    63 {

    64     return passMouseDownEventToWidget(renderWidget->widget());

    65 }

    66 

    67 // This function is used to route the mouse down event to the native widgets, it seems like a

    68 // work around for the Mac platform which does not support double clicks, but browsers do.

    69 bool EventHandler::passMouseDownEventToWidget(Widget*)

    70 {

    71     // return false so the normal propogation handles the event

    72     return false;

    73 }

    74 

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

    76 {

    77     notImplemented();

    78     return false;

    79 }

    80 

    81 // This function is called for mouse events by FrameView::handleMousePressEvent().

    82 // It is used to ensure that events are sync'ed correctly between frames. For example

    83 // if the user presses down in one frame and up in another frame, this function will

    84 // returns true, and pass the event to the correct frame.

    85 bool EventHandler::passSubframeEventToSubframe(MouseEventWithHitTestResults&, Frame*, HitTestResult*)

    86 {

    87     notImplemented();

    88     return false;

    89 }

    90 

    91 // This is called to route wheel events to child widgets when they are RenderWidget

    92 // as the parent usually gets wheel event. Don't have a mouse with a wheel to confirm

    93 // the operation of this function.

    94 bool EventHandler::passWheelEventToWidget(PlatformWheelEvent&, Widget*)

    95 {

    96     notImplemented();

    97     return false;

    98 }

    99 

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

   101 {

   102     return passSubframeEventToSubframe(mev, subframe);

   103 }

   104 

   105 bool EventHandler::passMouseMoveEventToSubframe(MouseEventWithHitTestResults& mev, 

   106     Frame* subframe, HitTestResult*)

   107 {

   108     return passSubframeEventToSubframe(mev, subframe);

   109 }

   110 

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

   112 {

   113     return passSubframeEventToSubframe(mev, subframe);

   114 }

   115 

   116 class Clipboard : public RefCounted<Clipboard> {

   117 };

   118 

   119 PassRefPtr<Clipboard> EventHandler::createDraggingClipboard() const

   120 {

   121     return PassRefPtr<Clipboard>(0);

   122 }

   123 

   124 unsigned EventHandler::accessKeyModifiers()

   125 {

   126     return PlatformKeyboardEvent::AltKey;

   127 }

   128 

   129 const double EventHandler::TextDragDelay = 0.0;

   130 

   131 }  // namespace WebCore