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package pongo2
import (
"bytes"
"regexp"
)
type tagSpacelessNode struct {
wrapper *NodeWrapper
}
var tagSpacelessRegexp = regexp.MustCompile(`(?U:(<.*>))([\t\n\v\f\r ]+)(?U:(<.*>))`)
func (node *tagSpacelessNode) Execute(ctx *ExecutionContext, writer TemplateWriter) *Error {
b := bytes.NewBuffer(make([]byte, 0, 1024)) // 1 KiB
err := node.wrapper.Execute(ctx, b)
if err != nil {
return err
}
s := b.String()
// Repeat this recursively
changed := true
for changed {
s2 := tagSpacelessRegexp.ReplaceAllString(s, "$1$3")
changed = s != s2
s = s2
}
writer.WriteString(s)
return nil
}
func tagSpacelessParser(doc *Parser, start *Token, arguments *Parser) (INodeTag, *Error) {
spacelessNode := &tagSpacelessNode{}
wrapper, _, err := doc.WrapUntilTag("endspaceless")
if err != nil {
return nil, err
}
spacelessNode.wrapper = wrapper
if arguments.Remaining() > 0 {
return nil, arguments.Error("Malformed spaceless-tag arguments.", nil)
}
return spacelessNode, nil
}
func init() {
RegisterTag("spaceless", tagSpacelessParser)
}
|
