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      1 /*
      2  * Copyright (C) 2006 Zack Rusin <zack (at) kde.org>
      3  *
      4  * Redistribution and use in source and binary forms, with or without
      5  * modification, are permitted provided that the following conditions
      6  * are met:
      7  * 1. Redistributions of source code must retain the above copyright
      8  *    notice, this list of conditions and the following disclaimer.
      9  * 2. Redistributions in binary form must reproduce the above copyright
     10  *    notice, this list of conditions and the following disclaimer in the
     11  *    documentation and/or other materials provided with the distribution.
     12  *
     13  * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY
     14  * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     15  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     16  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE COMPUTER, INC. OR
     17  * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
     18  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
     19  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
     20  * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
     21  * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     22  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
     23  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     24  */
     25 
     26 #include "config.h"
     27 #include "EventHandler.h"
     28 
     29 #include "ClipboardGtk.h"
     30 #include "FloatPoint.h"
     31 #include "FocusController.h"
     32 #include "Frame.h"
     33 #include "FrameView.h"
     34 #include "KeyboardEvent.h"
     35 #include "MouseEventWithHitTestResults.h"
     36 #include "NotImplemented.h"
     37 #include "Page.h"
     38 #include "PlatformKeyboardEvent.h"
     39 #include "PlatformWheelEvent.h"
     40 #include "RenderWidget.h"
     41 #include "Scrollbar.h"
     42 
     43 namespace WebCore {
     44 
     45 const double EventHandler::TextDragDelay = 0.0;
     46 
     47 bool EventHandler::tabsToAllFormControls(KeyboardEvent* event) const
     48 {
     49     // We always allow tabs to all controls
     50     return true;
     51 }
     52 
     53 void EventHandler::focusDocumentView()
     54 {
     55     if (Page* page = m_frame->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 bool EventHandler::passMouseDownEventToWidget(Widget* widget)
     74 {
     75     notImplemented();
     76     return false;
     77 }
     78 
     79 bool EventHandler::eventActivatedView(const PlatformMouseEvent&) const
     80 {
     81     //GTK+ activation is not necessarily tied to mouse events, so it may
     82     //not make sense to implement this
     83 
     84     notImplemented();
     85     return false;
     86 }
     87 
     88 bool EventHandler::passWheelEventToWidget(PlatformWheelEvent& event, Widget* widget)
     89 {
     90     ASSERT(widget);
     91     if (!widget->isFrameView())
     92         return false;
     93 
     94     return static_cast<FrameView*>(widget)->frame()->eventHandler()->handleWheelEvent(event);
     95 }
     96 
     97 PassRefPtr<Clipboard> EventHandler::createDraggingClipboard() const
     98 {
     99     return ClipboardGtk::create(ClipboardWritable, DataObjectGtk::create(), Clipboard::DragAndDrop, m_frame);
    100 }
    101 
    102 bool EventHandler::passMousePressEventToSubframe(MouseEventWithHitTestResults& mev, Frame* subframe)
    103 {
    104     subframe->eventHandler()->handleMousePressEvent(mev.event());
    105     return true;
    106 }
    107 
    108 bool EventHandler::passMouseMoveEventToSubframe(MouseEventWithHitTestResults& mev, Frame* subframe, HitTestResult* hoveredNode)
    109 {
    110     subframe->eventHandler()->handleMouseMoveEvent(mev.event(), hoveredNode);
    111     return true;
    112 }
    113 
    114 bool EventHandler::passMouseReleaseEventToSubframe(MouseEventWithHitTestResults& mev, Frame* subframe)
    115 {
    116     subframe->eventHandler()->handleMouseReleaseEvent(mev.event());
    117     return true;
    118 }
    119 
    120 unsigned EventHandler::accessKeyModifiers()
    121 {
    122     return PlatformKeyboardEvent::AltKey;
    123 }
    124 
    125 // GTK+ must scroll horizontally if the mouse pointer is on top of the
    126 // horizontal scrollbar while scrolling with the wheel; we need to
    127 // add the deltas and ticks here so that this behavior is consistent
    128 // for styled scrollbars.
    129 bool EventHandler::shouldTurnVerticalTicksIntoHorizontal(const HitTestResult& result) const
    130 {
    131     return result.scrollbar() && result.scrollbar()->orientation() == HorizontalScrollbar;
    132 }
    133 
    134 }
    135