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xmlNode <-
function(name, ..., attrs = NULL, namespace = "",
namespaceDefinitions = NULL, .children = list(...))
{
kids <- lapply(.children, asXMLNode)
kids = addNames(kids)
# Check the names paces
node <- list(name = name, attributes = attrs, children = kids, namespace=namespace,
namespaceDefinitions = as(namespaceDefinitions, "XMLNamespaceDefinitions"))
class(node) <- oldClass("XMLNode") # , "XMLAbstractNode")
node
}
setAs("NULL", "XMLNamespaceDefinitions", function(from) structure(list(), class = "XMLNamespaceDefinitions"))
addNames =
function(kids, fromTag = TRUE)
{
if(fromTag)
names(kids) = sapply(kids, xmlName)
else if(length(names(kids)) == 0)
names(kids) <- sapply(kids,xmlName)
else if(any( idx <- names(kids) == ""))
names(kids)[idx] <- sapply(kids[idx], xmlName)
kids
}
setGeneric("xmlChildren<-",
function(x, ..., value) {
standardGeneric("xmlChildren<-")
})
setMethod("xmlChildren<-", "ANY",
function(x, append = FALSE, ..., value) {
#value = addNames(value)
#x$children <- value
addChildren(x, append = append, ..., kids = value)
})
# Don't need this.
# xmlName.character =
# function(node, full = FALSE)
# "text"
setMethod("xmlChildren<-", "XMLInternalNode",
function(x, append = TRUE, ..., value) {
if(!append)
removeNodes(xmlChildren(x))
if(!is.list(value))
value = list(value)
addChildren(x, kids = value)
})
addChildren =
function(node, ..., kids = list(...), at = NA, cdata = FALSE, append = TRUE)
UseMethod("addChildren")
addChildren.XMLNode =
function(node, ..., kids = list(...), at = NA, cdata = FALSE, append = TRUE)
{
kids = lapply(kids,
function(i) {
if(!inherits(i, "XMLNode"))
xmlTextNode(as.character(i), cdata = cdata)
else
i
})
node$children = if(append) c(node$children, kids) else kids
node$children = addNames(node$children)
node
}
# It would be better tokenize this, but ...
XMLEntities =
c("&" = "amp", # order is important as if we insert an entity, then the next time we will see the &.
">" = "gt",
"<" = "lt",
"'" = "apos",
'"' = "quot")
insertEntities =
function(value, entities = XMLEntities)
{
pat = names(entities)
subs = paste("&", entities, ";", sep = "")
for(i in seq(along = entities))
value = gsub(pat[i], subs[i], value)
value
}
xmlTextNode <-
function(value, namespace = "", entities = XMLEntities, cdata = FALSE)
{
node <- xmlNode("text", namespace = namespace)
if(length(entities) && !inherits(value, "AsIs"))
value = insertEntities(value, XMLEntities)
if(cdata)
value = xmlCDataNode(value)
node$value <- value
if(!cdata)
class(node) <- oldClass("XMLTextNode") # , class(node))
if(length(entities))
class(node) <- c(class(node), "EntitiesEscaped") #"XMLEntitiesEscapedTextNode"
node
}
xmlPINode <-
function(sys, value, namespace="")
{
x <- xmlNode(name=sys, namespace=namespace)
x$value <- value
class(x) <- oldClass("XMLProcessingInstruction") # , class(x))
x
}
xmlCommentNode <-
function(text)
{
node <- xmlTextNode(text)
class(node) <- oldClass("XMLCommentNode") # , class(node))
node
}
xmlCDataNode <-
function(...)
{
txt <- paste(..., collapse="")
node <- xmlNode("text")
node$value <- txt
class(node) <- oldClass("XMLCDataNode") # , class(node))
node
}
asXMLNode <-
function(x)
{
#XXX
if(!inherits(x, "XMLNode")) {
xmlTextNode(x)
} else {
x
}
}
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