func (e *LiteralResultElement) Compile(node xml.Node) {
for cur := node.FirstChild(); cur != nil; cur = cur.NextSibling() {
res := CompileSingleNode(cur)
if res != nil {
res.Compile(cur)
e.Children = append(e.Children, res)
}
}
}
// Compile the variable.
//
// TODO: compile the XPath expression and determine if it is a constant
func (i *Variable) Compile(node xml.Node) {
i.Name = i.Node.Attr("name")
for cur := node.FirstChild(); cur != nil; cur = cur.NextSibling() {
res := CompileSingleNode(cur)
if res != nil {
res.Compile(cur)
i.Children = append(i.Children, res)
}
}
}
func (template *Template) CompileContent(node xml.Node) {
//parse the content and register the match pattern
for cur := node.FirstChild(); cur != nil; cur = cur.NextSibling() {
res := CompileSingleNode(cur)
if res != nil {
res.Compile(cur)
template.AddChild(res)
}
}
}
// ChildrenOf returns the node children, ignoring any whitespace-only text nodes that
// are stripped by strip-space or xml:space
func (context *ExecutionContext) ChildrenOf(node xml.Node) (children []xml.Node) {
for cur := node.FirstChild(); cur != nil; cur = cur.NextSibling() {
//don't count stripped nodes
if context.ShouldStrip(cur) {
continue
}
children = append(children, cur)
}
return
}
// Compile the instruction.
//
// TODO: we should validate the structure during this step
func (i *XsltInstruction) Compile(node xml.Node) {
for cur := node.FirstChild(); cur != nil; cur = cur.NextSibling() {
res := CompileSingleNode(cur)
if cur.Name() == "sort" && cur.Namespace() == XSLT_NAMESPACE {
i.sorting = append(i.sorting, compileSortFunction(res.(*XsltInstruction)))
continue
}
if res != nil {
res.Compile(cur)
i.Children = append(i.Children, res)
}
}
}
// Here we iterate through the children; this has been moved to its own function
// to facilitate the implementation of xsl:include (where we want the children to
// be treated as if they were part of the calling stylesheet)
func (style *Stylesheet) parseChildren(root xml.Node, fileuri string) (err error) {
//iterate through children
for cur := root.FirstChild(); cur != nil; cur = cur.NextSibling() {
//skip blank nodes
if IsBlank(cur) {
continue
}
//skip comment nodes
if cur.NodeType() == xml.XML_COMMENT_NODE {
continue
}
//handle templates
if IsXsltName(cur, "template") {
style.ParseTemplate(cur)
continue
}
if IsXsltName(cur, "variable") {
style.RegisterGlobalVariable(cur)
continue
}
if IsXsltName(cur, "key") {
name := cur.Attr("name")
use := cur.Attr("use")
match := cur.Attr("match")
k := &Key{make(map[string]xml.Nodeset), use, match}
style.Keys[name] = k
continue
}
//TODO: this is cheating. Also note global params can have their
// value overwritten
if IsXsltName(cur, "param") {
style.RegisterGlobalVariable(cur)
continue
}
if IsXsltName(cur, "attribute-set") {
style.RegisterAttributeSet(cur)
continue
}
if IsXsltName(cur, "include") {
//check for recursion, multiple includes
loc := cur.Attr("href")
base := path.Dir(fileuri)
loc = path.Join(base, loc)
_, already := style.includes[loc]
if already {
panic("Multiple include detected of " + loc)
}
style.includes[loc] = true
//load the stylesheet
doc, e := xml.ReadFile(loc, xml.StrictParseOption)
if e != nil {
fmt.Println(e)
err = e
return
}
//_, _ = ParseStylesheet(doc, loc)
//update the including stylesheet
e = style.parseChildren(doc.Root(), loc)
if e != nil {
fmt.Println(e)
err = e
return
}
continue
}
if IsXsltName(cur, "import") {
//check for recursion, multiple includes
loc := cur.Attr("href")
base := path.Dir(fileuri)
loc = path.Join(base, loc)
_, already := style.includes[loc]
if already {
panic("Multiple include detected of " + loc)
}
style.includes[loc] = true
//increment import; new style context
doc, _ := xmlReadFile(loc)
_import, _ := ParseStylesheet(doc, loc)
style.Imports.PushFront(_import)
continue
}
if IsXsltName(cur, "output") {
cdata := cur.Attr("cdata-section-elements")
if cdata != "" {
style.CDataElements = strings.Fields(cdata)
}
style.OutputMethod = cur.Attr("method")
omit := cur.Attr("omit-xml-declaration")
if omit == "yes" {
style.OmitXmlDeclaration = true
}
indent := cur.Attr("indent")
if indent == "yes" {
style.IndentOutput = true
}
standalone := cur.Attr("standalone")
if standalone == "yes" {
style.Standalone = true
}
encoding := cur.Attr("encoding")
if encoding != "" && encoding != "utf-8" {
//TODO: emit a warning if we do not support the encoding
// if unsupported, leave blank to output default UTF-8
style.DesiredEncoding = encoding
}
style.doctypeSystem = cur.Attr("doctype-system")
style.doctypePublic = cur.Attr("doctype-public")
continue
}
if IsXsltName(cur, "strip-space") {
el := cur.Attr("elements")
if el != "" {
style.StripSpace = strings.Fields(el)
}
continue
}
if IsXsltName(cur, "preserve-space") {
el := cur.Attr("elements")
if el != "" {
style.PreserveSpace = strings.Fields(el)
}
continue
}
if IsXsltName(cur, "namespace-alias") {
stylens := cur.Attr("stylesheet-prefix")
resns := cur.Attr("result-prefix")
style.NamespaceAlias[stylens] = resns
continue
}
if IsXsltName(cur, "decimal-format") {
fmt.Println("GLOBAL TODO ", cur.Name())
continue
}
}
return
}
func (i *XsltInstruction) copyToOutput(node xml.Node, context *ExecutionContext, recursive bool) {
switch node.NodeType() {
case xml.XML_TEXT_NODE:
if context.UseCDataSection(context.OutputNode) {
r := context.Output.CreateCDataNode(node.Content())
context.OutputNode.AddChild(r)
} else {
r := context.Output.CreateTextNode(node.Content())
context.OutputNode.AddChild(r)
}
case xml.XML_ATTRIBUTE_NODE:
aname := node.Name()
ahref := node.Namespace()
val := node.Content()
if ahref == "" {
context.OutputNode.SetAttr(aname, val)
} else {
context.OutputNode.SetNsAttr(ahref, aname, val)
}
case xml.XML_COMMENT_NODE:
r := context.Output.CreateCommentNode(node.Content())
context.OutputNode.AddChild(r)
case xml.XML_PI_NODE:
name := node.Attr("name")
r := context.Output.CreatePINode(name, node.Content())
context.OutputNode.AddChild(r)
case xml.XML_NAMESPACE_DECL:
//in theory this should work
//in practice it's a little complicated due to the fact
//that namespace declarations don't map to the node type
//very well
//will need to revisit
//context.OutputNode.DeclareNamespace(node.Name(), node.Content())
case xml.XML_ELEMENT_NODE:
aname := node.Name()
r := context.Output.CreateElementNode(aname)
context.OutputNode.AddChild(r)
ns := node.Namespace()
if ns != "" {
//TODO: search through namespaces in-scope
prefix, _ := context.Style.NamespaceMapping[ns]
r.SetNamespace(prefix, ns)
} else {
//may need to explicitly reset to empty namespace
def := context.DefaultNamespace(context.OutputNode)
if def != "" {
r.SetNamespace("", "")
}
}
//copy namespace declarations
for _, decl := range node.DeclaredNamespaces() {
r.DeclareNamespace(decl.Prefix, decl.Uri)
}
old := context.OutputNode
context.OutputNode = r
if recursive {
//copy attributes
for _, attr := range node.AttributeList() {
i.copyToOutput(attr, context, recursive)
}
for cur := node.FirstChild(); cur != nil; cur = cur.NextSibling() {
i.copyToOutput(cur, context, recursive)
}
}
context.OutputNode = old
case xml.XML_DOCUMENT_NODE:
if recursive {
for cur := node.FirstChild(); cur != nil; cur = cur.NextSibling() {
i.copyToOutput(cur, context, recursive)
}
}
}
}
