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      1 /*
      2  * Copyright (C) 2010 Company 100, Inc.
      3  * Copyright 2009, The Android Open Source Project
      4  * Copyright (C) 2006 Zack Rusin <zack (at) kde.org>
      5  *
      6  * Redistribution and use in source and binary forms, with or without
      7  * modification, are permitted provided that the following conditions
      8  * are met:
      9  * 1. Redistributions of source code must retain the above copyright
     10  *    notice, this list of conditions and the following disclaimer.
     11  * 2. Redistributions in binary form must reproduce the above copyright
     12  *    notice, this list of conditions and the following disclaimer in the
     13  *    documentation and/or other materials provided with the distribution.
     14  *
     15  * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY
     16  * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     17  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     18  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE COMPUTER, INC. OR
     19  * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
     20  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
     21  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
     22  * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
     23  * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     24  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
     25  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     26  */
     27 
     28 #include "config.h"
     29 #include "EventHandler.h"
     30 
     31 #include "ClipboardBrew.h"
     32 #include "EventNames.h"
     33 #include "FocusController.h"
     34 #include "Frame.h"
     35 #include "FrameView.h"
     36 #include "HitTestResult.h"
     37 #include "KeyboardEvent.h"
     38 #include "MouseEventWithHitTestResults.h"
     39 #include "NotImplemented.h"
     40 #include "Page.h"
     41 #include "PlatformKeyboardEvent.h"
     42 #include "PlatformWheelEvent.h"
     43 #include "RenderWidget.h"
     44 
     45 namespace WebCore {
     46 
     47 bool EventHandler::tabsToAllFormControls(KeyboardEvent* event) const
     48 {
     49     return true;
     50 }
     51 
     52 void EventHandler::focusDocumentView()
     53 {
     54     Page* page = m_frame->page();
     55     if (page)
     56         page->focusController()->setFocusedFrame(m_frame);
     57 }
     58 
     59 bool EventHandler::passWidgetMouseDownEventToWidget(const MouseEventWithHitTestResults& event)
     60 {
     61     // Figure out which view to send the event to.
     62     RenderObject* target = targetNode(event) ? targetNode(event)->renderer() : 0;
     63     if (!target || !target->isWidget())
     64         return false;
     65     return passMouseDownEventToWidget(toRenderWidget(target)->widget());
     66 }
     67 
     68 bool EventHandler::passWidgetMouseDownEventToWidget(RenderWidget* renderWidget)
     69 {
     70     return passMouseDownEventToWidget(renderWidget->widget());
     71 }
     72 
     73 // This function is used to route the mouse down event to the native widgets, it seems like a
     74 // work around for the Mac platform which does not support double clicks, but browsers do.
     75 bool EventHandler::passMouseDownEventToWidget(Widget* widget)
     76 {
     77     notImplemented();
     78     return false;
     79 }
     80 
     81 bool EventHandler::eventActivatedView(const PlatformMouseEvent&) const
     82 {
     83     notImplemented();
     84     return false;
     85 }
     86 
     87 // This function is called for mouse events by FrameView::handleMousePressEvent().
     88 // It is used to ensure that events are sync'ed correctly between frames. For example
     89 // if the user presses down in one frame and up in another frame, this function will
     90 // returns true, and pass the event to the correct frame.
     91 bool EventHandler::passSubframeEventToSubframe(MouseEventWithHitTestResults& event, Frame* subframe, HitTestResult*)
     92 {
     93     notImplemented();
     94     return false;
     95 }
     96 
     97 // This is called to route wheel events to child widgets when they are RenderWidget
     98 // as the parent usually gets wheel event. Don't have a mouse with a wheel to confirm
     99 // the operation of this function.
    100 bool EventHandler::passWheelEventToWidget(PlatformWheelEvent& event, Widget* widget)
    101 {
    102     notImplemented();
    103     return false;
    104 }
    105 
    106 bool EventHandler::passMousePressEventToSubframe(MouseEventWithHitTestResults& mev, Frame* subframe)
    107 {
    108     return passSubframeEventToSubframe(mev, subframe);
    109 }
    110 
    111 bool EventHandler::passMouseMoveEventToSubframe(MouseEventWithHitTestResults& mev, Frame* subframe, HitTestResult* hoveredNode)
    112 {
    113     return passSubframeEventToSubframe(mev, subframe, hoveredNode);
    114 }
    115 
    116 bool EventHandler::passMouseReleaseEventToSubframe(MouseEventWithHitTestResults& mev, Frame* subframe)
    117 {
    118     return passSubframeEventToSubframe(mev, subframe);
    119 }
    120 
    121 unsigned EventHandler::accessKeyModifiers()
    122 {
    123     return PlatformKeyboardEvent::AltKey;
    124 }
    125 
    126 } // namespace WebCore
    127 
    128