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      1 /*
      2  * Copyright (C) 2010 Google Inc. All rights reserved.
      3  * Copyright (C) 2011 Apple Inc. All rights reserved.
      4  *
      5  * Redistribution and use in source and binary forms, with or without
      6  * modification, are permitted provided that the following conditions are
      7  * met:
      8  *
      9  *     * Redistributions of source code must retain the above copyright
     10  * notice, this list of conditions and the following disclaimer.
     11  *     * Redistributions in binary form must reproduce the above
     12  * copyright notice, this list of conditions and the following disclaimer
     13  * in the documentation and/or other materials provided with the
     14  * distribution.
     15  *     * Neither the name of Google Inc. nor the names of its
     16  * contributors may be used to endorse or promote products derived from
     17  * this software without specific prior written permission.
     18  *
     19  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
     20  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
     21  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
     22  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
     23  * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
     24  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
     25  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
     26  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
     27  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     28  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
     29  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     30  */
     31 
     32 #include "config.h"
     33 #include "core/html/CheckboxInputType.h"
     34 
     35 #include "core/dom/KeyboardEvent.h"
     36 #include "core/html/HTMLInputElement.h"
     37 #include "core/html/InputTypeNames.h"
     38 #include "core/platform/LocalizedStrings.h"
     39 #include "wtf/PassOwnPtr.h"
     40 
     41 namespace WebCore {
     42 
     43 PassOwnPtr<InputType> CheckboxInputType::create(HTMLInputElement* element)
     44 {
     45     return adoptPtr(new CheckboxInputType(element));
     46 }
     47 
     48 const AtomicString& CheckboxInputType::formControlType() const
     49 {
     50     return InputTypeNames::checkbox();
     51 }
     52 
     53 bool CheckboxInputType::valueMissing(const String&) const
     54 {
     55     return element()->isRequired() && !element()->checked();
     56 }
     57 
     58 String CheckboxInputType::valueMissingText() const
     59 {
     60     return validationMessageValueMissingForCheckboxText();
     61 }
     62 
     63 void CheckboxInputType::handleKeyupEvent(KeyboardEvent* event)
     64 {
     65     const String& key = event->keyIdentifier();
     66     if (key != "U+0020")
     67         return;
     68     dispatchSimulatedClickIfActive(event);
     69 }
     70 
     71 PassOwnPtr<ClickHandlingState> CheckboxInputType::willDispatchClick()
     72 {
     73     // An event handler can use preventDefault or "return false" to reverse the checking we do here.
     74     // The ClickHandlingState object contains what we need to undo what we did here in didDispatchClick.
     75 
     76     OwnPtr<ClickHandlingState> state = adoptPtr(new ClickHandlingState);
     77 
     78     state->checked = element()->checked();
     79     state->indeterminate = element()->indeterminate();
     80 
     81     if (state->indeterminate)
     82         element()->setIndeterminate(false);
     83 
     84     element()->setChecked(!state->checked, DispatchChangeEvent);
     85 
     86     return state.release();
     87 }
     88 
     89 void CheckboxInputType::didDispatchClick(Event* event, const ClickHandlingState& state)
     90 {
     91     if (event->defaultPrevented() || event->defaultHandled()) {
     92         element()->setIndeterminate(state.indeterminate);
     93         element()->setChecked(state.checked);
     94     }
     95 
     96     // The work we did in willDispatchClick was default handling.
     97     event->setDefaultHandled();
     98 }
     99 
    100 bool CheckboxInputType::isCheckbox() const
    101 {
    102     return true;
    103 }
    104 
    105 bool CheckboxInputType::supportsIndeterminateAppearance() const
    106 {
    107     return true;
    108 }
    109 
    110 } // namespace WebCore
    111