Beispiel #1
0
//Implementation of document() from XSLT spec
func XsltDocumentFn(context xpath.VariableScope, args []interface{}) interface{} {
	if len(args) < 1 {
		return nil
	}
	c := context.(*ExecutionContext)

	switch doc := args[0].(type) {
	case string:
		if doc == "" {
			nodeset := xml.Nodeset{c.Style.Doc}
			return nodeset.ToPointers()
		}
		input := c.FetchInputDocument(doc, false)
		if input != nil {
			nodeset := xml.Nodeset{input}
			return nodeset.ToPointers()
		}
		return nil
	case []unsafe.Pointer:
		n := xml.NewNode(doc[0], nil)
		location := n.Content()
		input := c.FetchInputDocument(location, true)
		if input != nil {
			nodeset := xml.Nodeset{input}
			return nodeset.ToPointers()
		}
		fmt.Println("DOCUMENT", location)
	}
	return nil
}
Beispiel #2
0
func EXSLTnodeset(context xpath.VariableScope, args []interface{}) interface{} {
	if len(args) < 1 {
		return nil
	}
	c := context.(*ExecutionContext)
	nodes := args[0]
	switch v := nodes.(type) {
	case []unsafe.Pointer:
		if len(v) == 0 {
			return nil
		}
		fauxroot := c.Output.CreateElementNode("VARIABLE")
		for _, node := range v {
			n := xml.NewNode(node, nil)
			fauxroot.AddChild(n)
		}
		out := xml.Nodeset{fauxroot}
		return out.ToPointers()
	default:
		out := fmt.Sprintf("%v", v)
		fmt.Println("invalid argument to exslt:nodeset", out)
	}

	return nodes
}
Beispiel #3
0
func (context *ExecutionContext) EvalXPathAsNodeset(xmlNode xml.Node, data interface{}) (result xml.Nodeset, err error) {
	_, err = context.EvalXPath(xmlNode, data)
	if err != nil {
		return nil, err
	}
	nodePtrs, err := context.XPathContext.ResultAsNodeset()
	if err != nil {
		return nil, err
	}
	var output xml.Nodeset
	for _, nodePtr := range nodePtrs {
		output = append(output, xml.NewNode(nodePtr, xmlNode.MyDocument()))
	}
	result = output
	return
}
Beispiel #4
0
// util function because we can't assume we're actually getting a string
func argValToString(val interface{}) (out string) {
	if val == nil {
		return
	}
	switch v := val.(type) {
	case string:
		return v
	case []unsafe.Pointer:
		if len(v) == 0 {
			return
		}
		n := xml.NewNode(v[0], nil)
		out = n.Content()
	default:
		out = fmt.Sprintf("%v", v)
	}
	return
}
Beispiel #5
0
func (context *ExecutionContext) EvalXPath(xmlNode xml.Node, data interface{}) (result interface{}, err error) {
	switch data := data.(type) {
	case string:
		if xpathExpr := xpath.Compile(data); xpathExpr != nil {
			defer xpathExpr.Free()
			result, err = context.EvalXPath(xmlNode, xpathExpr)
		} else {
			err = errors.New("cannot compile xpath: " + data)
		}
	case []byte:
		result, err = context.EvalXPath(xmlNode, string(data))
	case *xpath.Expression:
		xpathCtx := context.XPathContext
		xpathCtx.SetResolver(context)
		err := xpathCtx.Evaluate(xmlNode.NodePtr(), data)
		if err != nil {
			return nil, err
		}
		rt := xpathCtx.ReturnType()
		switch rt {
		case xpath.XPATH_NODESET, xpath.XPATH_XSLT_TREE:
			nodePtrs, err := xpathCtx.ResultAsNodeset()
			if err != nil {
				return nil, err
			}
			var output []xml.Node
			for _, nodePtr := range nodePtrs {
				output = append(output, xml.NewNode(nodePtr, xmlNode.MyDocument()))
			}
			result = output
		case xpath.XPATH_NUMBER:
			result, err = xpathCtx.ResultAsNumber()
		case xpath.XPATH_BOOLEAN:
			result, err = xpathCtx.ResultAsBoolean()
		default:
			result, err = xpathCtx.ResultAsString()
		}
	default:
		err = errors.New("Strange type passed to ExecutionContext.EvalXPath")
	}
	return
}
Beispiel #6
0
func parsefragment(document xml.Document, node *xml.XmlNode, content, url []byte, options xml.ParseOption) (fragment *xml.DocumentFragment, err error) {
	//set up pointers before calling the C function
	var contentPtr, urlPtr unsafe.Pointer
	if len(url) > 0 {
		urlPtr = unsafe.Pointer(&url[0])
	}

	var root xml.Node
	if node == nil {
		containBody := (bytes.Index(content, bodySigBytes) >= 0)

		content = append(fragmentWrapper, content...)
		contentPtr = unsafe.Pointer(&content[0])
		contentLen := len(content)

		inEncoding := document.InputEncoding()
		var encodingPtr unsafe.Pointer
		if len(inEncoding) > 0 {
			encodingPtr = unsafe.Pointer(&inEncoding[0])
		}
		htmlPtr := C.htmlParseFragmentAsDoc(document.DocPtr(), contentPtr, C.int(contentLen), urlPtr, encodingPtr, C.int(options), nil, 0)

		//Note we've parsed the fragment within the given document
		//the root is not the root of the document; rather it's the root of the subtree from the fragment
		html := xml.NewNode(unsafe.Pointer(htmlPtr), document)

		if html == nil {
			err = ErrFailParseFragment
			return
		}
		root = html

		if !containBody {
			root = html.FirstChild()
			html.AddPreviousSibling(root)
			html.Remove() //remove html otherwise it's leaked
		}
	} else {
		//wrap the content
		newContent := append(fragmentWrapperStart, content...)
		newContent = append(newContent, fragmentWrapperEnd...)
		contentPtr = unsafe.Pointer(&newContent[0])
		contentLen := len(newContent)
		rootElementPtr := C.htmlParseFragment(node.NodePtr(), contentPtr, C.int(contentLen), urlPtr, C.int(options), nil, 0)
		if rootElementPtr == nil {
			//try to parse it as a doc
			fragment, err = parsefragment(document, nil, content, url, options)
			return
		}
		if rootElementPtr == nil {
			err = ErrFailParseFragment
			return
		}
		root = xml.NewNode(unsafe.Pointer(rootElementPtr), document)
	}

	fragment = &xml.DocumentFragment{}
	fragment.Node = root
	fragment.InEncoding = document.InputEncoding()
	fragment.OutEncoding = document.OutputEncoding()

	document.BookkeepFragment(fragment)
	return
}