Merge WebKit at r75315: Initial merge by git.

Change-Id: I570314b346ce101c935ed22a626b48c2af266b84

1 files changed, 162 insertions, 0 deletions

diff --git a/Source/WebCore/html/FormAssociatedElement.cpp b/Source/WebCore/html/FormAssociatedElement.cpp
new file mode 100644
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--- /dev/null
+++ b/Source/WebCore/html/FormAssociatedElement.cpp
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+/*
+ * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
+ *           (C) 1999 Antti Koivisto (koivisto@kde.org)
+ *           (C) 2001 Dirk Mueller (mueller@kde.org)
+ * Copyright (C) 2004, 2005, 2006, 2007 Apple Inc. All rights reserved.
+ *           (C) 2006 Alexey Proskuryakov (ap@nypop.com)
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Library General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Library General Public License for more details.
+ *
+ * You should have received a copy of the GNU Library General Public License
+ * along with this library; see the file COPYING.LIB.  If not, write to
+ * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
+ * Boston, MA 02110-1301, USA.
+ *
+ */
+
+#include "config.h"
+#include "FormAssociatedElement.h"
+
+#include "HTMLFormControlElement.h"
+#include "HTMLFormElement.h"
+#include "HTMLNames.h"
+#include "HTMLObjectElement.h"
+#include "ValidityState.h"
+
+namespace WebCore {
+
+using namespace HTMLNames;
+
+FormAssociatedElement::FormAssociatedElement(HTMLFormElement* form)
+    : m_form(form)
+{
+}
+
+FormAssociatedElement::~FormAssociatedElement()
+{
+}
+
+ValidityState* FormAssociatedElement::validity()
+{
+    if (!m_validityState)
+        m_validityState = ValidityState::create(this);
+
+    return m_validityState.get();
+}
+
+void FormAssociatedElement::insertedIntoTree()
+{
+    HTMLElement* element = toHTMLElement(this);
+    if (element->fastHasAttribute(formAttr)) {
+        element->document()->registerFormElementWithFormAttribute(this);
+        Element* formElement = element->document()->getElementById(element->fastGetAttribute(formAttr));
+        if (formElement && formElement->hasTagName(formTag)) {
+            if (m_form)
+                m_form->removeFormElement(this);
+            m_form = static_cast<HTMLFormElement*>(formElement);
+            m_form->registerFormElement(this);
+        }
+    }
+    if (!m_form) {
+        // This handles the case of a new form element being created by
+        // JavaScript and inserted inside a form.  In the case of the parser
+        // setting a form, we will already have a non-null value for m_form,
+        // and so we don't need to do anything.
+        m_form = element->findFormAncestor();
+        if (m_form)
+            m_form->registerFormElement(this);
+    }
+}
+
+static inline Node* findRoot(Node* n)
+{
+    Node* root = n;
+    for (; n; n = n->parentNode())
+        root = n;
+    return root;
+}
+
+void FormAssociatedElement::removedFromTree()
+{
+    HTMLElement* element = toHTMLElement(this);
+    if (element->fastHasAttribute(formAttr))
+        element->document()->unregisterFormElementWithFormAttribute(this);
+
+    // If the form and element are both in the same tree, preserve the connection to the form.
+    // Otherwise, null out our form and remove ourselves from the form's list of elements.
+    if (m_form && findRoot(element) != findRoot(m_form))
+        removeFromForm();
+}
+
+void FormAssociatedElement::removeFromForm()
+{
+    if (!m_form)
+        return;
+    m_form->removeFormElement(this);
+    m_form = 0;
+}
+
+void FormAssociatedElement::resetFormOwner(HTMLFormElement* form)
+{
+    HTMLElement* element = toHTMLElement(this);
+    const AtomicString& formId(element->fastGetAttribute(formAttr));
+    if (m_form) {
+        if (formId.isNull())
+            return;
+        m_form->removeFormElement(this);
+    }
+    m_form = 0;
+    if (!formId.isNull()) {
+        // The HTML5 spec says that the element should be associated with
+        // the first element in the document to have an ID that equal to
+        // the value of form attribute, so we put the result of
+        // document()->getElementById() over the given element.
+        Element* firstElement = element->document()->getElementById(formId);
+        if (firstElement && firstElement->hasTagName(formTag))
+            m_form = static_cast<HTMLFormElement*>(firstElement);
+        else
+            m_form = form;
+    } else
+        m_form = element->findFormAncestor();
+    if (m_form)
+        m_form->registerFormElement(this);
+}
+
+void FormAssociatedElement::formAttributeChanged()
+{
+    HTMLElement* element = toHTMLElement(this);
+    if (!element->fastHasAttribute(formAttr)) {
+        // The form attribute removed. We need to reset form owner here.
+        if (m_form)
+            m_form->removeFormElement(this);
+        m_form = element->findFormAncestor();
+        if (m_form)
+            form()->registerFormElement(this);
+    } else
+        resetFormOwner(0);
+}
+
+const HTMLElement* toHTMLElement(const FormAssociatedElement* associatedElement)
+{
+    if (associatedElement->isFormControlElement())
+        return static_cast<const HTMLFormControlElement*>(associatedElement);
+    // Assumes the element is an HTMLObjectElement
+    const HTMLElement* element = static_cast<const HTMLObjectElement*>(associatedElement);
+    ASSERT(element->hasTagName(objectTag));
+    return element;
+}
+
+HTMLElement* toHTMLElement(FormAssociatedElement* associatedElement)
+{
+    return const_cast<HTMLElement*>(toHTMLElement(static_cast<const FormAssociatedElement*>(associatedElement)));
+}
+
+} // namespace Webcore