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      1 /*
      2  * Copyright (C) 1999 Lars Knoll (knoll (at) kde.org)
      3  *           (C) 1999 Antti Koivisto (koivisto (at) kde.org)
      4  *           (C) 2001 Dirk Mueller (mueller (at) kde.org)
      5  * Copyright (C) 2004, 2005, 2006, 2007, 2010 Apple Inc. All rights reserved.
      6  *           (C) 2006 Alexey Proskuryakov (ap (at) nypop.com)
      7  * Copyright (C) 2007 Samuel Weinig (sam (at) webkit.org)
      8  *
      9  * This library is free software; you can redistribute it and/or
     10  * modify it under the terms of the GNU Library General Public
     11  * License as published by the Free Software Foundation; either
     12  * version 2 of the License, or (at your option) any later version.
     13  *
     14  * This library is distributed in the hope that it will be useful,
     15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
     16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
     17  * Library General Public License for more details.
     18  *
     19  * You should have received a copy of the GNU Library General Public License
     20  * along with this library; see the file COPYING.LIB.  If not, write to
     21  * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
     22  * Boston, MA 02110-1301, USA.
     23  *
     24  */
     25 
     26 #include "config.h"
     27 #include "core/html/HTMLButtonElement.h"
     28 
     29 #include "core/HTMLNames.h"
     30 #include "core/dom/Attribute.h"
     31 #include "core/events/KeyboardEvent.h"
     32 #include "core/html/FormDataList.h"
     33 #include "core/html/HTMLFormElement.h"
     34 #include "core/rendering/RenderButton.h"
     35 #include "wtf/StdLibExtras.h"
     36 
     37 namespace WebCore {
     38 
     39 using namespace HTMLNames;
     40 
     41 inline HTMLButtonElement::HTMLButtonElement(Document& document, HTMLFormElement* form)
     42     : HTMLFormControlElement(buttonTag, document, form)
     43     , m_type(SUBMIT)
     44     , m_isActivatedSubmit(false)
     45 {
     46     ScriptWrappable::init(this);
     47 }
     48 
     49 PassRefPtrWillBeRawPtr<HTMLButtonElement> HTMLButtonElement::create(Document& document, HTMLFormElement* form)
     50 {
     51     return adoptRefWillBeNoop(new HTMLButtonElement(document, form));
     52 }
     53 
     54 void HTMLButtonElement::setType(const AtomicString& type)
     55 {
     56     setAttribute(typeAttr, type);
     57 }
     58 
     59 RenderObject* HTMLButtonElement::createRenderer(RenderStyle*)
     60 {
     61     return new RenderButton(this);
     62 }
     63 
     64 const AtomicString& HTMLButtonElement::formControlType() const
     65 {
     66     switch (m_type) {
     67         case SUBMIT: {
     68             DEFINE_STATIC_LOCAL(const AtomicString, submit, ("submit", AtomicString::ConstructFromLiteral));
     69             return submit;
     70         }
     71         case BUTTON: {
     72             DEFINE_STATIC_LOCAL(const AtomicString, button, ("button", AtomicString::ConstructFromLiteral));
     73             return button;
     74         }
     75         case RESET: {
     76             DEFINE_STATIC_LOCAL(const AtomicString, reset, ("reset", AtomicString::ConstructFromLiteral));
     77             return reset;
     78         }
     79     }
     80 
     81     ASSERT_NOT_REACHED();
     82     return emptyAtom;
     83 }
     84 
     85 bool HTMLButtonElement::isPresentationAttribute(const QualifiedName& name) const
     86 {
     87     if (name == alignAttr) {
     88         // Don't map 'align' attribute.  This matches what Firefox and IE do, but not Opera.
     89         // See http://bugs.webkit.org/show_bug.cgi?id=12071
     90         return false;
     91     }
     92 
     93     return HTMLFormControlElement::isPresentationAttribute(name);
     94 }
     95 
     96 void HTMLButtonElement::parseAttribute(const QualifiedName& name, const AtomicString& value)
     97 {
     98     if (name == typeAttr) {
     99         if (equalIgnoringCase(value, "reset"))
    100             m_type = RESET;
    101         else if (equalIgnoringCase(value, "button"))
    102             m_type = BUTTON;
    103         else
    104             m_type = SUBMIT;
    105         setNeedsWillValidateCheck();
    106     } else
    107         HTMLFormControlElement::parseAttribute(name, value);
    108 }
    109 
    110 void HTMLButtonElement::defaultEventHandler(Event* event)
    111 {
    112     if (event->type() == EventTypeNames::DOMActivate && !isDisabledFormControl()) {
    113         if (form() && m_type == SUBMIT) {
    114             m_isActivatedSubmit = true;
    115             form()->prepareForSubmission(event);
    116             event->setDefaultHandled();
    117             m_isActivatedSubmit = false; // Do this in case submission was canceled.
    118         }
    119         if (form() && m_type == RESET) {
    120             form()->reset();
    121             event->setDefaultHandled();
    122         }
    123     }
    124 
    125     if (event->isKeyboardEvent()) {
    126         if (event->type() == EventTypeNames::keydown && toKeyboardEvent(event)->keyIdentifier() == "U+0020") {
    127             setActive(true);
    128             // No setDefaultHandled() - IE dispatches a keypress in this case.
    129             return;
    130         }
    131         if (event->type() == EventTypeNames::keypress) {
    132             switch (toKeyboardEvent(event)->charCode()) {
    133                 case '\r':
    134                     dispatchSimulatedClick(event);
    135                     event->setDefaultHandled();
    136                     return;
    137                 case ' ':
    138                     // Prevent scrolling down the page.
    139                     event->setDefaultHandled();
    140                     return;
    141             }
    142         }
    143         if (event->type() == EventTypeNames::keyup && toKeyboardEvent(event)->keyIdentifier() == "U+0020") {
    144             if (active())
    145                 dispatchSimulatedClick(event);
    146             event->setDefaultHandled();
    147             return;
    148         }
    149     }
    150 
    151     HTMLFormControlElement::defaultEventHandler(event);
    152 }
    153 
    154 bool HTMLButtonElement::willRespondToMouseClickEvents()
    155 {
    156     if (!isDisabledFormControl() && form() && (m_type == SUBMIT || m_type == RESET))
    157         return true;
    158     return HTMLFormControlElement::willRespondToMouseClickEvents();
    159 }
    160 
    161 bool HTMLButtonElement::canBeSuccessfulSubmitButton() const
    162 {
    163     return m_type == SUBMIT;
    164 }
    165 
    166 bool HTMLButtonElement::isActivatedSubmit() const
    167 {
    168     return m_isActivatedSubmit;
    169 }
    170 
    171 void HTMLButtonElement::setActivatedSubmit(bool flag)
    172 {
    173     m_isActivatedSubmit = flag;
    174 }
    175 
    176 bool HTMLButtonElement::appendFormData(FormDataList& formData, bool)
    177 {
    178     if (m_type != SUBMIT || name().isEmpty() || !m_isActivatedSubmit)
    179         return false;
    180     formData.appendData(name(), value());
    181     return true;
    182 }
    183 
    184 void HTMLButtonElement::accessKeyAction(bool sendMouseEvents)
    185 {
    186     focus();
    187 
    188     dispatchSimulatedClick(0, sendMouseEvents ? SendMouseUpDownEvents : SendNoEvents);
    189 }
    190 
    191 bool HTMLButtonElement::isURLAttribute(const Attribute& attribute) const
    192 {
    193     return attribute.name() == formactionAttr || HTMLFormControlElement::isURLAttribute(attribute);
    194 }
    195 
    196 const AtomicString& HTMLButtonElement::value() const
    197 {
    198     return getAttribute(valueAttr);
    199 }
    200 
    201 bool HTMLButtonElement::recalcWillValidate() const
    202 {
    203     return m_type == SUBMIT && HTMLFormControlElement::recalcWillValidate();
    204 }
    205 
    206 bool HTMLButtonElement::isInteractiveContent() const
    207 {
    208     return true;
    209 }
    210 
    211 bool HTMLButtonElement::supportsAutofocus() const
    212 {
    213     return true;
    214 }
    215 
    216 } // namespace
    217