func (s *State) formatTreeErr(name string, tr *parse.Tree, node parse.Node, err error) error {
loc, _ := tr.ErrorContext(node)
if loc != "" {
// Might to adjust the column due to the prepend varNop nodes
file, line, col, ok := splitErrorContext(loc)
if ok {
col -= s.p.tmpl.offsets[tr][line]
loc = fmt.Sprintf("%s:%d:%d", file, line, col)
}
err = fmt.Errorf("%s: %s", loc, err.Error())
}
return err
}
// removeVarNopNodes removes any nodes of the form
// {{ $Something := _gondola_nop }}
// They are used to fool the parser and letting us parse
// variable nodes which haven't been previously defined
// in the same template.
func (t *Template) removeVarNopNodes(tr *parse.Tree, nodes []parse.Node) []parse.Node {
var newNodes []parse.Node
for _, v := range nodes {
if an, ok := v.(*parse.ActionNode); ok {
if len(an.Pipe.Cmds) == 1 && len(an.Pipe.Cmds[0].Args) == 1 {
if id, ok := an.Pipe.Cmds[0].Args[0].(*parse.IdentifierNode); ok && id.Ident == varNop {
// Store offset for errors
loc, _ := tr.ErrorContext(v)
if _, line, _, ok := splitErrorContext(loc); ok {
if t.offsets[tr] == nil {
t.offsets[tr] = make(map[int]int)
}
varName := an.Pipe.Decl[0].Ident[0]
// delim (2) + space (1) + len(varname) + space(1) + := (2) + space(1) + len(varNop) + space (1) + delim (2)
t.offsets[tr][line] += 2 + 1 + len(varName) + 1 + 2 + 1 + len(varNop) + 1 + 2
}
continue
}
}
}
newNodes = append(newNodes, v)
}
return newNodes
}
// ReplaceTranslatableBlocks replaces begintrans/endtrans blocks
// with an equivalent action using the translation function named
// by fn.
func ReplaceTranslatableBlocks(tr *parse.Tree, fn string) error {
var err error
WalkTree(tr, func(n, p parse.Node) {
if err != nil {
return
}
if IsPseudoFunction(n, BeginTranslatableBlock) {
list, ok := p.(*parse.ListNode)
if !ok {
loc, ctx := tr.ErrorContext(n)
err = fmt.Errorf("%s:%s:%s not in ListNode (%T)", loc, ctx, BeginTranslatableBlock, p)
return
}
cmd := &parse.CommandNode{
NodeType: parse.NodeCommand,
Pos: n.Position(),
}
pipe := &parse.PipeNode{
NodeType: parse.NodePipe,
Pos: n.Position(),
Cmds: []*parse.CommandNode{cmd},
}
repl := &parse.ActionNode{
NodeType: parse.NodeAction,
Pos: n.Position(),
Pipe: pipe,
}
if repl != nil {
}
pos := -1
for ii, v := range list.Nodes {
if v == n {
pos = ii
break
}
}
var pipes []parse.Node
var buf bytes.Buffer
endPos := -1
Nodes:
for ii, v := range list.Nodes[pos+1:] {
switch x := v.(type) {
case *parse.TextNode:
buf.Write(x.Text)
case *parse.ActionNode:
if IsPseudoFunction(x, EndTranslatableBlock) {
endPos = ii
break Nodes
}
if len(x.Pipe.Decl) > 0 {
loc, ctx := tr.ErrorContext(n)
err = fmt.Errorf("%s:%s:%s translatable block can't contain a pipe with declaractions", loc, ctx, v)
}
buf.WriteString("%v")
pipes = append(pipes, x.Pipe)
default:
loc, ctx := tr.ErrorContext(n)
err = fmt.Errorf("%s translatable block can't contain %T %s", loc, v, ctx)
return
}
}
if buf.Len() > 0 {
text := buf.String()
quoted := strconv.Quote(text)
innerPipe := &parse.PipeNode{
NodeType: parse.NodePipe,
Pos: n.Position(),
Cmds: []*parse.CommandNode{
&parse.CommandNode{
NodeType: parse.NodeCommand,
Pos: n.Position(),
Args: []parse.Node{parse.NewIdentifier(fn), &parse.StringNode{
NodeType: parse.NodeString,
Pos: n.Position(),
Quoted: quoted,
Text: text,
}},
},
},
}
cmd.Args = append(cmd.Args, parse.NewIdentifier("printf"), innerPipe)
cmd.Args = append(cmd.Args, pipes...)
}
nodes := list.Nodes[:pos]
nodes = append(nodes, repl)
nodes = append(nodes, list.Nodes[endPos+pos+1:]...)
list.Nodes = nodes
}
})
return err
}
