src/third_party/WebKit/Source/core/html/shadow/ClearButtonElement.cpp

   1 /*
   2  * Copyright (C) 2013 Google Inc. All rights reserved.
   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 INC. AND ITS CONTRIBUTORS ``AS IS'' AND
  14  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  15  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  16  * ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS BE LIABLE
  17  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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  22  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  23  * SUCH DAMAGE.
  24  */
  25
  26 #include "config.h"
  27 #include "core/html/shadow/ClearButtonElement.h"
  28
  29 #include "core/events/MouseEvent.h"
  30 #include "core/frame/LocalFrame.h"
  31 #include "core/html/shadow/ShadowElementNames.h"
  32 #include "core/page/EventHandler.h"
  33 #include "core/rendering/RenderView.h"
  34
  35 namespace blink {
  36
  37 using namespace HTMLNames;
  38
  39 inline ClearButtonElement::ClearButtonElement(Document& document, ClearButtonOwner& clearButtonOwner)
  40     : HTMLDivElement(document)
  41     , m_clearButtonOwner(&clearButtonOwner)
  42     , m_capturing(false)
  43 {
  44 }
  45
  46 PassRefPtrWillBeRawPtr<ClearButtonElement> ClearButtonElement::create(Document& document, ClearButtonOwner& clearButtonOwner)
  47 {
  48     RefPtrWillBeRawPtr<ClearButtonElement> element = adoptRefWillBeNoop(new ClearButtonElement(document, clearButtonOwner));
  49     element->setShadowPseudoId(AtomicString("-webkit-clear-button", AtomicString::ConstructFromLiteral));
  50     element->setAttribute(idAttr, ShadowElementNames::clearButton());
  51     return element.release();
  52 }
  53
  54 void ClearButtonElement::detach(const AttachContext& context)
  55 {
  56     if (m_capturing) {
  57         if (LocalFrame* frame = document().frame())
  58             frame->eventHandler().setCapturingMouseEventsNode(nullptr);
  59     }
  60     HTMLDivElement::detach(context);
  61 }
  62
  63 void ClearButtonElement::releaseCapture()
  64 {
  65     if (!m_capturing)
  66         return;
  67
  68     if (LocalFrame* frame = document().frame()) {
  69         frame->eventHandler().setCapturingMouseEventsNode(nullptr);
  70         m_capturing = false;
  71     }
  72 }
  73
  74 void ClearButtonElement::defaultEventHandler(Event* event)
  75 {
  76     if (!m_clearButtonOwner) {
  77         if (!event->defaultHandled())
  78             HTMLDivElement::defaultEventHandler(event);
  79         return;
  80     }
  81
  82     if (!m_clearButtonOwner->shouldClearButtonRespondToMouseEvents()) {
  83         if (!event->defaultHandled())
  84             HTMLDivElement::defaultEventHandler(event);
  85         return;
  86     }
  87
  88     if (event->type() == EventTypeNames::mousedown && event->isMouseEvent() && toMouseEvent(event)->button() == LeftButton) {
  89         if (renderer() && renderer()->visibleToHitTesting()) {
  90             if (LocalFrame* frame = document().frame()) {
  91                 frame->eventHandler().setCapturingMouseEventsNode(this);
  92                 m_capturing = true;
  93             }
  94         }
  95         m_clearButtonOwner->focusAndSelectClearButtonOwner();
  96         event->setDefaultHandled();
  97     }
  98     if (event->type() == EventTypeNames::mouseup && event->isMouseEvent() && toMouseEvent(event)->button() == LeftButton) {
  99         if (m_capturing) {
 100             if (LocalFrame* frame = document().frame()) {
 101                 frame->eventHandler().setCapturingMouseEventsNode(nullptr);
 102                 m_capturing = false;
 103             }
 104             if (hovered()) {
 105                 m_clearButtonOwner->clearValue();
 106                 event->setDefaultHandled();
 107             }
 108         }
 109     }
 110
 111     if (!event->defaultHandled())
 112         HTMLDivElement::defaultEventHandler(event);
 113 }
 114
 115 bool ClearButtonElement::isClearButtonElement() const
 116 {
 117     return true;
 118 }
 119
 120 void ClearButtonElement::trace(Visitor* visitor)
 121 {
 122     visitor->trace(m_clearButtonOwner);
 123     HTMLDivElement::trace(visitor);
 124 }
 125
 126 }