/*! \brief Reads the data of the specified attribute into the pre-allocated
\a result.
\param name the name of the attribute
\param result the BString to be set to the value of the attribute
\return
- \c B_OK: Everything went fine.
- \c B_BAD_VALUE: \c NULL \a name or \a result
- \c B_FILE_ERROR: The object is not initialized.
- \c B_ENTRY_NOT_FOUND: The node has no attribute \a attr.
*/
status_t
BNode::ReadAttrString(const char *name, BString *result) const
{
if (!name || !result)
return B_BAD_VALUE;
attr_info info;
status_t error;
error = GetAttrInfo(name, &info);
if (error != B_OK)
return error;
// Lock the string's buffer so we can meddle with it
char *data = result->LockBuffer(info.size+1);
if (!data)
return B_NO_MEMORY;
// Read the attribute
ssize_t bytes = ReadAttr(name, B_STRING_TYPE, 0, data, info.size);
// Check for failure
if (bytes < 0) {
error = bytes;
bytes = 0; // In this instance, we simply clear the string
} else
error = B_OK;
// Null terminate the new string just to be sure (since it *is*
// possible to read and write non-NULL-terminated strings)
data[bytes] = 0;
result->UnlockBuffer();
return error;
}
void
HTMLMenuItemElement::WalkRadioGroup(Visitor* aVisitor)
{
nsIContent* parent = GetParent();
if (!parent) {
aVisitor->Visit(this);
return;
}
nsAttrInfo info1(GetAttrInfo(kNameSpaceID_None,
nsGkAtoms::radiogroup));
bool info1Empty = !info1.mValue || info1.mValue->IsEmptyString();
for (nsIContent* cur = parent->GetFirstChild();
cur;
cur = cur->GetNextSibling()) {
HTMLMenuItemElement* menuitem = HTMLMenuItemElement::FromContent(cur);
if (!menuitem || menuitem->GetType() != CMD_TYPE_RADIO) {
continue;
}
nsAttrInfo info2(menuitem->GetAttrInfo(kNameSpaceID_None,
nsGkAtoms::radiogroup));
bool info2Empty = !info2.mValue || info2.mValue->IsEmptyString();
if (info1Empty != info2Empty ||
(info1.mValue && info2.mValue && !info1.mValue->Equals(*info2.mValue))) {
continue;
}
if (!aVisitor->Visit(menuitem)) {
break;
}
}
}
