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      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,
     23  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
     24  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
     25  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
     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
    183