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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 "HTMLNames.h"
     30 #include "core/dom/Attribute.h"
     31 #include "core/dom/EventNames.h"
     32 #include "core/dom/KeyboardEvent.h"
     33 #include "core/html/FormDataList.h"
     34 #include "core/html/HTMLFormElement.h"
     35 #include "core/rendering/RenderButton.h"
     36 #include "wtf/StdLibExtras.h"
     37 
     38 namespace WebCore {
     39 
     40 using namespace HTMLNames;
     41 
     42 inline HTMLButtonElement::HTMLButtonElement(const QualifiedName& tagName, Document* document, HTMLFormElement* form)
     43     : HTMLFormControlElement(tagName, document, form)
     44     , m_type(SUBMIT)
     45     , m_isActivatedSubmit(false)
     46 {
     47     ASSERT(hasTagName(buttonTag));
     48     ScriptWrappable::init(this);
     49 }
     50 
     51 PassRefPtr<HTMLButtonElement> HTMLButtonElement::create(const QualifiedName& tagName, Document* document, HTMLFormElement* form)
     52 {
     53     return adoptRef(new HTMLButtonElement(tagName, document, form));
     54 }
     55 
     56 void HTMLButtonElement::setType(const AtomicString& type)
     57 {
     58     setAttribute(typeAttr, type);
     59 }
     60 
     61 RenderObject* HTMLButtonElement::createRenderer(RenderStyle*)
     62 {
     63     return new RenderButton(this);
     64 }
     65 
     66 const AtomicString& HTMLButtonElement::formControlType() const
     67 {
     68     switch (m_type) {
     69         case SUBMIT: {
     70             DEFINE_STATIC_LOCAL(const AtomicString, submit, ("submit", AtomicString::ConstructFromLiteral));
     71             return submit;
     72         }
     73         case BUTTON: {
     74             DEFINE_STATIC_LOCAL(const AtomicString, button, ("button", AtomicString::ConstructFromLiteral));
     75             return button;
     76         }
     77         case RESET: {
     78             DEFINE_STATIC_LOCAL(const AtomicString, reset, ("reset", AtomicString::ConstructFromLiteral));
     79             return reset;
     80         }
     81     }
     82 
     83     ASSERT_NOT_REACHED();
     84     return emptyAtom;
     85 }
     86 
     87 bool HTMLButtonElement::isPresentationAttribute(const QualifiedName& name) const
     88 {
     89     if (name == alignAttr) {
     90         // Don't map 'align' attribute.  This matches what Firefox and IE do, but not Opera.
     91         // See http://bugs.webkit.org/show_bug.cgi?id=12071
     92         return false;
     93     }
     94 
     95     return HTMLFormControlElement::isPresentationAttribute(name);
     96 }
     97 
     98 void HTMLButtonElement::parseAttribute(const QualifiedName& name, const AtomicString& value)
     99 {
    100     if (name == typeAttr) {
    101         if (equalIgnoringCase(value, "reset"))
    102             m_type = RESET;
    103         else if (equalIgnoringCase(value, "button"))
    104             m_type = BUTTON;
    105         else
    106             m_type = SUBMIT;
    107         setNeedsWillValidateCheck();
    108     } else
    109         HTMLFormControlElement::parseAttribute(name, value);
    110 }
    111 
    112 void HTMLButtonElement::defaultEventHandler(Event* event)
    113 {
    114     if (event->type() == eventNames().DOMActivateEvent && !isDisabledFormControl()) {
    115         if (form() && m_type == SUBMIT) {
    116             m_isActivatedSubmit = true;
    117             form()->prepareForSubmission(event);
    118             event->setDefaultHandled();
    119             m_isActivatedSubmit = false; // Do this in case submission was canceled.
    120         }
    121         if (form() && m_type == RESET) {
    122             form()->reset();
    123             event->setDefaultHandled();
    124         }
    125     }
    126 
    127     if (event->isKeyboardEvent()) {
    128         if (event->type() == eventNames().keydownEvent && toKeyboardEvent(event)->keyIdentifier() == "U+0020") {
    129             setActive(true, true);
    130             // No setDefaultHandled() - IE dispatches a keypress in this case.
    131             return;
    132         }
    133         if (event->type() == eventNames().keypressEvent) {
    134             switch (toKeyboardEvent(event)->charCode()) {
    135                 case '\r':
    136                     dispatchSimulatedClick(event);
    137                     event->setDefaultHandled();
    138                     return;
    139                 case ' ':
    140                     // Prevent scrolling down the page.
    141                     event->setDefaultHandled();
    142                     return;
    143             }
    144         }
    145         if (event->type() == eventNames().keyupEvent && toKeyboardEvent(event)->keyIdentifier() == "U+0020") {
    146             if (active())
    147                 dispatchSimulatedClick(event);
    148             event->setDefaultHandled();
    149             return;
    150         }
    151     }
    152 
    153     HTMLFormControlElement::defaultEventHandler(event);
    154 }
    155 
    156 bool HTMLButtonElement::willRespondToMouseClickEvents()
    157 {
    158     if (!isDisabledFormControl() && form() && (m_type == SUBMIT || m_type == RESET))
    159         return true;
    160     return HTMLFormControlElement::willRespondToMouseClickEvents();
    161 }
    162 
    163 bool HTMLButtonElement::isSuccessfulSubmitButton() const
    164 {
    165     // HTML spec says that buttons must have names to be considered successful.
    166     // However, other browsers do not impose this constraint.
    167     return m_type == SUBMIT && !isDisabledFormControl();
    168 }
    169 
    170 bool HTMLButtonElement::isActivatedSubmit() const
    171 {
    172     return m_isActivatedSubmit;
    173 }
    174 
    175 void HTMLButtonElement::setActivatedSubmit(bool flag)
    176 {
    177     m_isActivatedSubmit = flag;
    178 }
    179 
    180 bool HTMLButtonElement::appendFormData(FormDataList& formData, bool)
    181 {
    182     if (m_type != SUBMIT || name().isEmpty() || !m_isActivatedSubmit)
    183         return false;
    184     formData.appendData(name(), value());
    185     return true;
    186 }
    187 
    188 void HTMLButtonElement::accessKeyAction(bool sendMouseEvents)
    189 {
    190     focus();
    191 
    192     dispatchSimulatedClick(0, sendMouseEvents ? SendMouseUpDownEvents : SendNoEvents);
    193 }
    194 
    195 bool HTMLButtonElement::isURLAttribute(const Attribute& attribute) const
    196 {
    197     return attribute.name() == formactionAttr || HTMLFormControlElement::isURLAttribute(attribute);
    198 }
    199 
    200 String HTMLButtonElement::value() const
    201 {
    202     return getAttribute(valueAttr);
    203 }
    204 
    205 bool HTMLButtonElement::recalcWillValidate() const
    206 {
    207     return m_type == SUBMIT && HTMLFormControlElement::recalcWillValidate();
    208 }
    209 
    210 } // namespace
    211