external/webkit r30707

1 files changed, 360 insertions, 0 deletions

diff --git a/WebCore/dom/NamedAttrMap.cpp b/WebCore/dom/NamedAttrMap.cpp
new file mode 100644
index 0000000..ee89bcc
--- /dev/null
+++ b/WebCore/dom/NamedAttrMap.cpp
@@ -0,0 +1,360 @@
+/*
+ * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
+ *           (C) 1999 Antti Koivisto (koivisto@kde.org)
+ *           (C) 2001 Peter Kelly (pmk@post.com)
+ *           (C) 2001 Dirk Mueller (mueller@kde.org)
+ * Copyright (C) 2004, 2005, 2006, 2007 Apple Inc. All rights reserved.
+ *           (C) 2007 Eric Seidel (eric@webkit.org)
+ *
+ * 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 "NamedAttrMap.h"
+
+#include "Document.h"
+#include "Element.h"
+#include "ExceptionCode.h"
+#include "HTMLNames.h"
+
+namespace WebCore {
+
+using namespace HTMLNames;
+
+static inline bool shouldIgnoreAttributeCase(const Element* e)
+{
+    return e && e->document()->isHTMLDocument() && e->isHTMLElement();
+}
+
+NamedAttrMap::NamedAttrMap(Element *e)
+    : element(e)
+    , attrs(0)
+    , len(0)
+{
+}
+
+NamedAttrMap::~NamedAttrMap()
+{
+    NamedAttrMap::clearAttributes(); // virtual method, so qualify just to be explicit
+}
+
+bool NamedAttrMap::isMappedAttributeMap() const
+{
+    return false;
+}
+
+PassRefPtr<Node> NamedAttrMap::getNamedItem(const String& name) const
+{
+    String localName = shouldIgnoreAttributeCase(element) ? name.lower() : name;
+    Attribute* a = getAttributeItem(localName);
+    if (!a)
+        return 0;
+    
+    return a->createAttrIfNeeded(element);
+}
+
+PassRefPtr<Node> NamedAttrMap::getNamedItemNS(const String& namespaceURI, const String& localName) const
+{
+    return getNamedItem(QualifiedName(nullAtom, localName, namespaceURI));
+}
+
+PassRefPtr<Node> NamedAttrMap::removeNamedItem(const String& name, ExceptionCode& ec)
+{
+    String localName = shouldIgnoreAttributeCase(element) ? name.lower() : name;
+    Attribute* a = getAttributeItem(localName);
+    if (!a) {
+        ec = NOT_FOUND_ERR;
+        return 0;
+    }
+    
+    return removeNamedItem(a->name(), ec);
+}
+
+PassRefPtr<Node> NamedAttrMap::removeNamedItemNS(const String& namespaceURI, const String& localName, ExceptionCode& ec)
+{
+    return removeNamedItem(QualifiedName(nullAtom, localName, namespaceURI), ec);
+}
+
+PassRefPtr<Node> NamedAttrMap::getNamedItem(const QualifiedName& name) const
+{
+    Attribute* a = getAttributeItem(name);
+    if (!a)
+        return 0;
+
+    return a->createAttrIfNeeded(element);
+}
+
+PassRefPtr<Node> NamedAttrMap::setNamedItem(Node* arg, ExceptionCode& ec)
+{
+    if (!element) {
+        ec = NOT_FOUND_ERR;
+        return 0;
+    }
+
+    // NO_MODIFICATION_ALLOWED_ERR: Raised if this map is readonly.
+    if (isReadOnlyNode()) {
+        ec = NO_MODIFICATION_ALLOWED_ERR;
+        return 0;
+    }
+
+    // WRONG_DOCUMENT_ERR: Raised if arg was created from a different document than the one that created this map.
+    if (arg->document() != element->document()) {
+        ec = WRONG_DOCUMENT_ERR;
+        return 0;
+    }
+
+    // Not mentioned in spec: throw a HIERARCHY_REQUEST_ERROR if the user passes in a non-attribute node
+    if (!arg->isAttributeNode()) {
+        ec = HIERARCHY_REQUEST_ERR;
+        return 0;
+    }
+    Attr *attr = static_cast<Attr*>(arg);
+
+    Attribute* a = attr->attr();
+    Attribute* old = getAttributeItem(a->name());
+    if (old == a)
+        return RefPtr<Node>(arg); // we know about it already
+
+    // INUSE_ATTRIBUTE_ERR: Raised if arg is an Attr that is already an attribute of another Element object.
+    // The DOM user must explicitly clone Attr nodes to re-use them in other elements.
+    if (attr->ownerElement()) {
+        ec = INUSE_ATTRIBUTE_ERR;
+        return 0;
+    }
+
+    if (a->name() == idAttr)
+        element->updateId(old ? old->value() : nullAtom, a->value());
+
+    // ### slightly inefficient - resizes attribute array twice.
+    RefPtr<Node> r;
+    if (old) {
+        r = old->createAttrIfNeeded(element);
+        removeAttribute(a->name());
+    }
+
+    addAttribute(a);
+    return r.release();
+}
+
+// The DOM2 spec doesn't say that removeAttribute[NS] throws NOT_FOUND_ERR
+// if the attribute is not found, but at this level we have to throw NOT_FOUND_ERR
+// because of removeNamedItem, removeNamedItemNS, and removeAttributeNode.
+PassRefPtr<Node> NamedAttrMap::removeNamedItem(const QualifiedName& name, ExceptionCode& ec)
+{
+    // ### should this really be raised when the attribute to remove isn't there at all?
+    // NO_MODIFICATION_ALLOWED_ERR: Raised when the node is readonly
+    if (isReadOnlyNode()) {
+        ec = NO_MODIFICATION_ALLOWED_ERR;
+        return 0;
+    }
+
+    Attribute* a = getAttributeItem(name);
+    if (!a) {
+        ec = NOT_FOUND_ERR;
+        return 0;
+    }
+
+    RefPtr<Node> r = a->createAttrIfNeeded(element);
+
+    if (name == idAttr)
+        element->updateId(a->value(), nullAtom);
+
+    removeAttribute(name);
+    return r.release();
+}
+
+PassRefPtr<Node> NamedAttrMap::item ( unsigned index ) const
+{
+    if (index >= len)
+        return 0;
+
+    return attrs[index]->createAttrIfNeeded(element);
+}
+
+Attribute* NamedAttrMap::getAttributeItem(const String& name) const
+{
+    for (unsigned i = 0; i < len; ++i) {
+        if (!attrs[i]->name().hasPrefix() && 
+            attrs[i]->name().localName() == name)
+                return attrs[i];
+        
+        if (attrs[i]->name().toString() == name)
+            return attrs[i];
+    }
+    return 0;
+}
+
+Attribute* NamedAttrMap::getAttributeItem(const QualifiedName& name) const
+{
+    for (unsigned i = 0; i < len; ++i) {
+        if (attrs[i]->name().matches(name))
+            return attrs[i];
+    }
+    return 0;
+}
+
+void NamedAttrMap::clearAttributes()
+{
+    if (attrs) {
+        for (unsigned i = 0; i < len; i++) {
+            if (attrs[i]->attr())
+                attrs[i]->attr()->m_element = 0;
+            attrs[i]->deref();
+        }
+        fastFree(attrs);
+        attrs = 0;
+    }
+    len = 0;
+}
+
+void NamedAttrMap::detachFromElement()
+{
+    // we allow a NamedAttrMap w/o an element in case someone still has a reference
+    // to if after the element gets deleted - but the map is now invalid
+    element = 0;
+    clearAttributes();
+}
+
+NamedAttrMap& NamedAttrMap::operator=(const NamedAttrMap& other)
+{
+    // clone all attributes in the other map, but attach to our element
+    if (!element)
+        return *this;
+
+    // If assigning the map changes the id attribute, we need to call
+    // updateId.
+
+    Attribute *oldId = getAttributeItem(idAttr);
+    Attribute *newId = other.getAttributeItem(idAttr);
+
+    if (oldId || newId)
+        element->updateId(oldId ? oldId->value() : nullAtom, newId ? newId->value() : nullAtom);
+
+    clearAttributes();
+    len = other.len;
+    attrs = static_cast<Attribute **>(fastMalloc(len * sizeof(Attribute *)));
+
+    // first initialize attrs vector, then call attributeChanged on it
+    // this allows attributeChanged to use getAttribute
+    for (unsigned i = 0; i < len; i++) {
+        attrs[i] = other.attrs[i]->clone();
+        attrs[i]->ref();
+    }
+
+    // FIXME: This is wasteful.  The class list could be preserved on a copy, and we
+    // wouldn't have to waste time reparsing the attribute.
+    // The derived class, HTMLNamedAttrMap, which manages a parsed class list for the CLASS attribute,
+    // will update its member variable when parse attribute is called.
+    for(unsigned i = 0; i < len; i++)
+        element->attributeChanged(attrs[i], true);
+
+    return *this;
+}
+
+void NamedAttrMap::addAttribute(PassRefPtr<Attribute> prpAttribute)
+{
+    Attribute* attribute = prpAttribute.releaseRef(); // The attrs array will own this pointer.
+
+    // Add the attribute to the list
+    attrs = static_cast<Attribute**>(fastRealloc(attrs, (len + 1) * sizeof(Attribute*)));
+    attrs[len++] = attribute;
+
+    if (Attr* attr = attribute->attr())
+        attr->m_element = element;
+
+    // Notify the element that the attribute has been added, and dispatch appropriate mutation events
+    // Note that element may be null here if we are called from insertAttr() during parsing
+    if (element) {
+        element->attributeChanged(attribute);
+        // Because of our updateStyleAttributeIfNeeded() style modification events are never sent at the right time, so don't bother sending them.
+        if (attribute->name() != styleAttr) {
+            element->dispatchAttrAdditionEvent(attribute);
+            element->dispatchSubtreeModifiedEvent();
+        }
+    }
+}
+
+void NamedAttrMap::removeAttribute(const QualifiedName& name)
+{
+    unsigned index = len+1;
+    for (unsigned i = 0; i < len; ++i)
+        if (attrs[i]->name().matches(name)) {
+            index = i;
+            break;
+        }
+
+    if (index >= len) return;
+
+    // Remove the attribute from the list
+    Attribute* attr = attrs[index];
+    if (attrs[index]->attr())
+        attrs[index]->attr()->m_element = 0;
+    if (len == 1) {
+        fastFree(attrs);
+        attrs = 0;
+        len = 0;
+    } else {
+        Attribute **newAttrs = static_cast<Attribute **>(fastMalloc((len - 1) * sizeof(Attribute *)));
+        unsigned i;
+        for (i = 0; i < unsigned(index); i++)
+            newAttrs[i] = attrs[i];
+        len--;
+        for (; i < len; i++)
+            newAttrs[i] = attrs[i+1];
+        fastFree(attrs);
+        attrs = newAttrs;
+    }
+
+    // Notify the element that the attribute has been removed
+    // dispatch appropriate mutation events
+    if (element && !attr->m_value.isNull()) {
+        AtomicString value = attr->m_value;
+        attr->m_value = nullAtom;
+        element->attributeChanged(attr);
+        attr->m_value = value;
+    }
+    if (element) {
+        element->dispatchAttrRemovalEvent(attr);
+        element->dispatchSubtreeModifiedEvent();
+    }
+    attr->deref();
+}
+
+bool NamedAttrMap::mapsEquivalent(const NamedAttrMap* otherMap) const
+{
+    if (!otherMap)
+        return false;
+    
+    if (length() != otherMap->length())
+        return false;
+    
+    for (unsigned i = 0; i < length(); i++) {
+        Attribute *attr = attributeItem(i);
+        Attribute *otherAttr = otherMap->getAttributeItem(attr->name());
+            
+        if (!otherAttr || attr->value() != otherAttr->value())
+            return false;
+    }
+    
+    return true;
+}
+
+bool NamedAttrMap::isReadOnlyNode()
+{
+    return element && element->isReadOnlyNode();
+}
+
+}