func (w *ViewWriter) writeCodeExecution(nd *Node, haml *formatting.IndentingWriter, src *formatting.IndentingWriter, currentHtmlIndex int) int {
// end most recent haml output
haml.Println("`,")
// start next haml output (which will follow this code output
haml.Println("`")
// All call to write html from array
src.Printf("fmt.Fprint(w, %sHtml[%d])\n", w.destinationName, currentHtmlIndex)
currentHtmlIndex++
// attempt to keep formatting across user code.
// Here we're checking to see if this is the end of a block statement
// if so, we need to decrease indent
first := getFirstChar(nd.text)
if first == '}' {
src.DecrIndent()
}
// add user's code
src.Printf("%s\n", nd.text)
// If user code ends in {, incr indent as they started a block statement
last := getLastChar(nd.text)
if last == '{' {
src.IncrIndent()
}
for n := nd.children.Front(); n != nil; n = n.Next() {
currentHtmlIndex = w.writeNode(n.Value.(*Node), haml, src, currentHtmlIndex)
}
return currentHtmlIndex
}
// Recursive function to write parsed HAML Nodes
func (w *ViewWriter) writeNode(nd *Node, haml *formatting.IndentingWriter, src *formatting.IndentingWriter, currentHtmlIndex int) int {
if nd.name == "code_output" {
return w.writeCodeOutput(nd, haml, src, currentHtmlIndex)
} else if nd.name == "code_execution" {
return w.writeCodeExecution(nd, haml, src, currentHtmlIndex)
}
haml.Printf("<%s", nd.name)
if nd.id != nil {
w.writeAttribute(nd.id, haml)
}
if nd.class != nil {
w.writeAttribute(nd.class, haml)
}
for attrEl := nd.attributes.Front(); attrEl != nil; attrEl = attrEl.Next() {
attr := attrEl.Value.(*nameValueStr)
w.writeAttribute(attr, haml)
}
if nd.selfClosing {
haml.Println(" />`)")
return currentHtmlIndex
} else {
haml.Print(">")
}
// Outputting text.
// If tag only contains short text, add it on same line
if w.canChildContentFitOnOneLine(nd) {
haml.Printf("%s</%s>\n", nd.text, nd.name)
return currentHtmlIndex
}
// We either have long text, child tags or both
// so we add it as indented child content
haml.Println("")
haml.IncrIndent()
if len(nd.text) > 0 {
w.writeLongText(nd.text, haml)
}
for n := nd.children.Front(); n != nil; n = n.Next() {
currentHtmlIndex = w.writeNode(n.Value.(*Node), haml, src, currentHtmlIndex)
}
haml.DecrIndent()
haml.Printf("</%s>\n", nd.name)
return currentHtmlIndex
}
func (w *ViewWriter) writeCodeOutput(el *list.Element, haml, src, pattern *formatting.IndentingWriter,
currentHtmlIndex, currentPatternIndex int, nodeType CodeOutputType) (htmlIndex, patternIndex int) {
nd := el.Value.(*Node)
htmlIndex = currentHtmlIndex
patternIndex = currentPatternIndex
if !w.writingCodeOutput {
// First code output node - close off haml node output:
// end most recent haml output
haml.Println("`,")
// start next haml output (which will follow this code output
haml.Println("`")
// Add call to write html from array
src.Printf("fmt.Fprint(w, %sHtml[%d])\n", w.viewName, currentHtmlIndex)
if nodeType == Literal || nodeType == EscapedValue {
// Add calls to execute template. However, we need to know which
// object to inject into template. Usually this will be 'data', but
// can be something else inside a loop, for example, so we take the
// object from the first dynamic element
objectToInject := "data"
if nodeType == EscapedValue {
objectToInject = getObjectName(nd.text)
} else {
LookaheadLoop:
for n := el; n != nil; n = n.Next() {
node := n.Value.(*Node)
switch node.name {
case "code_output_dynamic":
objectToInject = getObjectName(node.text)
break LookaheadLoop
}
}
}
src.Printf("err = wr.templates[%d].Execute(w, %s)\n", currentPatternIndex, objectToInject)
src.Printf("handle%sError(err)\n", w.properViewName)
// start a new pattern string
pattern.Print("`")
w.writingCodeOutput = true
patternIndex++
}
htmlIndex++
}
// These stop writing patterns, so we need to close off pattern strings
if w.writingCodeOutput && (nodeType == RawValue || nodeType == Execution) {
pattern.Println("`,")
w.writingCodeOutput = false
}
// add call to print output
switch nodeType {
case Literal:
pattern.Print(nd.text)
case EscapedValue:
// print the path to the desired object for the template pattern
patternStr := "."
index := strings.Index(nd.text, ".")
if index > 0 {
patternStr = nd.text[index:]
}
pattern.Printf("{{%s}}", patternStr)
case RawValue:
src.Printf("fmt.Fprint(w, %s)\n", nd.text)
case Execution:
// attempt to keep formatting across user code.
// Here we're checking to see if this is the end of a block statement
// if so, we need to decrease indent
first := getFirstChar(nd.text)
if first == '}' {
src.DecrIndent()
}
// add user's code
src.Printf("%s\n", nd.text)
// If user code ends in {, incr indent as they started a block statement
last := getLastChar(nd.text)
if last == '{' {
src.IncrIndent()
}
}
for n := nd.children.Front(); n != nil; n = n.Next() {
htmlIndex, patternIndex = w.writeNode(n, haml, src, pattern, htmlIndex, patternIndex)
}
return
}
// Recursive function to write parsed HAML Nodes
// We have to return a bool indicating if we have escaped any HTML (XSS protection)
// so that we know if we need to include the templating library for that function
func (w *ViewWriter) writeNode(el *list.Element,
haml, src, pattern *formatting.IndentingWriter,
currentHtmlIndex, currentPatternIndex int) (htmlIndex, patternIndex int) {
nd := el.Value.(*Node)
htmlIndex = currentHtmlIndex
patternIndex = currentPatternIndex
switch nd.name {
case "code_output_literal":
return w.writeCodeOutput(el, haml, src, pattern, htmlIndex, patternIndex, Literal)
case "code_output_value":
return w.writeCodeOutput(el, haml, src, pattern, htmlIndex, patternIndex, EscapedValue)
case "code_output_raw":
return w.writeCodeOutput(el, haml, src, pattern, htmlIndex, patternIndex, RawValue)
case "code_execution":
return w.writeCodeOutput(el, haml, src, pattern, htmlIndex, patternIndex, Execution)
}
if w.writingCodeOutput {
// we've finished writing code output and we're back to haml
// so close off our pattern string
pattern.Println("`,")
}
w.writingCodeOutput = false
if nd.name != "" {
haml.Printf("<%s", nd.name)
if nd.id != nil {
w.writeAttribute(nd.id, haml)
}
if nd.class != nil {
w.writeAttribute(nd.class, haml)
}
for attrEl := nd.attributes.Front(); attrEl != nil; attrEl = attrEl.Next() {
attr := attrEl.Value.(*nameValueStr)
w.writeAttribute(attr, haml)
}
if nd.selfClosing {
haml.Print(" />")
if nd.text != "" {
haml.Printf(" %s", nd.text)
}
haml.Println("")
return
} else {
haml.Print(">")
}
}
// Outputting text.
// If tag only contains short text, add it on same line
if w.canChildContentFitOnOneLine(nd) {
if nd.name == "" {
haml.Printf("%s\n", nd.text)
} else {
haml.Printf("%s</%s>\n", nd.text, nd.name)
}
return
}
// We either have long text, child tags or both
// so we add it as indented child content
haml.Println("")
haml.IncrIndent()
if len(nd.text) > 0 {
w.writeLongText(nd.text, haml)
}
for n := nd.children.Front(); n != nil; n = n.Next() {
htmlIndex, patternIndex = w.writeNode(n, haml, src, pattern, htmlIndex, patternIndex)
}
haml.DecrIndent()
if nd.name != "" {
haml.Printf("</%s>\n", nd.name)
}
return
}