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      1 /*
      2  * Copyright (C) 2010, 2012 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/ValidationMessage.h"
     33 
     34 #include "core/html/HTMLFormControlElement.h"
     35 #include "core/page/Page.h"
     36 #include "core/page/ValidationMessageClient.h"
     37 #include "wtf/PassOwnPtr.h"
     38 
     39 namespace WebCore {
     40 
     41 ALWAYS_INLINE ValidationMessage::ValidationMessage(HTMLFormControlElement* element)
     42     : m_element(element)
     43 {
     44     ASSERT(m_element);
     45 }
     46 
     47 ValidationMessage::~ValidationMessage()
     48 {
     49     if (ValidationMessageClient* client = validationMessageClient())
     50         client->hideValidationMessage(*m_element);
     51 }
     52 
     53 PassOwnPtr<ValidationMessage> ValidationMessage::create(HTMLFormControlElement* element)
     54 {
     55     return adoptPtr(new ValidationMessage(element));
     56 }
     57 
     58 ValidationMessageClient* ValidationMessage::validationMessageClient() const
     59 {
     60     Page* page = m_element->document().page();
     61     if (!page)
     62         return 0;
     63     // The form valdiation feature requires ValidationMessageClient.
     64     ASSERT(page->validationMessageClient());
     65     return page->validationMessageClient();
     66 }
     67 
     68 void ValidationMessage::updateValidationMessage(const String& message)
     69 {
     70     ValidationMessageClient* client = validationMessageClient();
     71     if (!client)
     72         return;
     73     if (message.isEmpty())
     74         requestToHideMessage();
     75     else
     76         client->showValidationMessage(*m_element, message);
     77 }
     78 
     79 void ValidationMessage::requestToHideMessage()
     80 {
     81     if (ValidationMessageClient* client = validationMessageClient())
     82         client->hideValidationMessage(*m_element);
     83 }
     84 
     85 bool ValidationMessage::isVisible() const
     86 {
     87     if (ValidationMessageClient* client = validationMessageClient())
     88         return client->isValidationMessageVisible(*m_element);
     89     return false;
     90 }
     91 
     92 } // namespace WebCore
     93