src/third_party/WebKit/Source/core/html/forms/SearchInputType.cpp

   1 /*
   2  * Copyright (C) 2010 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 are
   6  * met:
   7  *
   8  *     * Redistributions of source code must retain the above copyright
   9  * notice, this list of conditions and the following disclaimer.
  10  *     * Redistributions in binary form must reproduce the above
  11  * copyright notice, this list of conditions and the following disclaimer
  12  * in the documentation and/or other materials provided with the
  13  * distribution.
  14  *     * Neither the name of Google Inc. nor the names of its
  15  * contributors may be used to endorse or promote products derived from
  16  * this software without specific prior written permission.
  17  *
  18  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  19  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  20  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  21  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  22  * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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  24  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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  26  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  27  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  28  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  29  */
  30
  31 #include "config.h"
  32 #include "core/html/forms/SearchInputType.h"
  33
  34 #include "bindings/core/v8/ExceptionStatePlaceholder.h"
  35 #include "core/HTMLNames.h"
  36 #include "core/InputTypeNames.h"
  37 #include "core/events/KeyboardEvent.h"
  38 #include "core/dom/shadow/ShadowRoot.h"
  39 #include "core/html/HTMLInputElement.h"
  40 #include "core/html/shadow/ShadowElementNames.h"
  41 #include "core/html/shadow/TextControlInnerElements.h"
  42 #include "core/rendering/RenderSearchField.h"
  43 #include "wtf/PassOwnPtr.h"
  44
  45 namespace blink {
  46
  47 using namespace HTMLNames;
  48
  49 inline SearchInputType::SearchInputType(HTMLInputElement& element)
  50     : BaseTextInputType(element)
  51     , m_searchEventTimer(this, &SearchInputType::searchEventTimerFired)
  52 {
  53 }
  54
  55 PassRefPtrWillBeRawPtr<InputType> SearchInputType::create(HTMLInputElement& element)
  56 {
  57     return adoptRefWillBeNoop(new SearchInputType(element));
  58 }
  59
  60 void SearchInputType::countUsage()
  61 {
  62     countUsageIfVisible(UseCounter::InputTypeSearch);
  63 }
  64
  65 RenderObject* SearchInputType::createRenderer(RenderStyle*) const
  66 {
  67     return new RenderSearchField(&element());
  68 }
  69
  70 const AtomicString& SearchInputType::formControlType() const
  71 {
  72     return InputTypeNames::search;
  73 }
  74
  75 bool SearchInputType::shouldRespectSpeechAttribute()
  76 {
  77     return true;
  78 }
  79
  80 bool SearchInputType::needsContainer() const
  81 {
  82     return true;
  83 }
  84
  85 void SearchInputType::createShadowSubtree()
  86 {
  87     TextFieldInputType::createShadowSubtree();
  88     Element* container = containerElement();
  89     Element* viewPort = element().userAgentShadowRoot()->getElementById(ShadowElementNames::editingViewPort());
  90     ASSERT(container);
  91     ASSERT(viewPort);
  92
  93     container->insertBefore(SearchFieldDecorationElement::create(element().document()), viewPort);
  94     container->insertBefore(SearchFieldCancelButtonElement::create(element().document()), viewPort->nextSibling());
  95 }
  96
  97 void SearchInputType::handleKeydownEvent(KeyboardEvent* event)
  98 {
  99     if (element().isDisabledOrReadOnly()) {
 100         TextFieldInputType::handleKeydownEvent(event);
 101         return;
 102     }
 103
 104     const String& key = event->keyIdentifier();
 105     if (key == "U+001B") {
 106         RefPtrWillBeRawPtr<HTMLInputElement> input(element());
 107         input->setValueForUser("");
 108         input->onSearch();
 109         event->setDefaultHandled();
 110         return;
 111     }
 112     TextFieldInputType::handleKeydownEvent(event);
 113 }
 114
 115 void SearchInputType::startSearchEventTimer()
 116 {
 117     ASSERT(element().renderer());
 118     unsigned length = element().innerEditorValue().length();
 119
 120     if (!length) {
 121         stopSearchEventTimer();
 122         element().onSearch();
 123         return;
 124     }
 125
 126     // After typing the first key, we wait 0.5 seconds.
 127     // After the second key, 0.4 seconds, then 0.3, then 0.2 from then on.
 128     m_searchEventTimer.startOneShot(max(0.2, 0.6 - 0.1 * length), FROM_HERE);
 129 }
 130
 131 void SearchInputType::stopSearchEventTimer()
 132 {
 133     m_searchEventTimer.stop();
 134 }
 135
 136 void SearchInputType::searchEventTimerFired(Timer<SearchInputType>*)
 137 {
 138     element().onSearch();
 139 }
 140
 141 bool SearchInputType::searchEventsShouldBeDispatched() const
 142 {
 143     return element().hasAttribute(incrementalAttr);
 144 }
 145
 146 void SearchInputType::didSetValueByUserEdit(ValueChangeState state)
 147 {
 148     updateCancelButtonVisibility();
 149
 150     // If the incremental attribute is set, then dispatch the search event
 151     if (searchEventsShouldBeDispatched())
 152         startSearchEventTimer();
 153
 154     TextFieldInputType::didSetValueByUserEdit(state);
 155 }
 156
 157 void SearchInputType::updateView()
 158 {
 159     BaseTextInputType::updateView();
 160     updateCancelButtonVisibility();
 161 }
 162
 163 void SearchInputType::updateCancelButtonVisibility()
 164 {
 165     Element* button = element().userAgentShadowRoot()->getElementById(ShadowElementNames::clearButton());
 166     if (!button)
 167         return;
 168     if (element().value().isEmpty()) {
 169         button->setInlineStyleProperty(CSSPropertyOpacity, 0.0, CSSPrimitiveValue::CSS_NUMBER);
 170         button->setInlineStyleProperty(CSSPropertyPointerEvents, CSSValueNone);
 171     } else {
 172         button->removeInlineStyleProperty(CSSPropertyOpacity);
 173         button->removeInlineStyleProperty(CSSPropertyPointerEvents);
 174     }
 175 }
 176
 177 bool SearchInputType::supportsInputModeAttribute() const
 178 {
 179     return true;
 180 }
 181
 182 } // namespace blink