/
syntax.go
183 lines (166 loc) · 4.65 KB
/
syntax.go
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package shell
import (
"github.com/lmorg/murex/utils/inject"
"github.com/lmorg/murex/utils/parser"
)
func syntaxCompletion(line []rune, change string, pos int) ([]rune, int) {
if pos < 0 || len(line) < pos {
return line, pos
}
var part parser.ParsedTokens
full, _ := parse(line)
if pos >= len(line)-1 {
part = full
} else {
part, _ = parse(line[:pos+1])
}
if part.Escaped || part.Comment {
return line, pos
}
var previousRune rune
if pos > 0 {
previousRune = line[pos-1] // character before current one
}
var nextRune rune
if pos < len(line)-1 {
nextRune = line[pos+1] // character after current one
}
if len(line) > 1 && pos > 0 && previousRune == '\\' {
return line, pos
}
posEOL := pos == len(line)-1
switch change {
case "'":
switch {
case (part.NestedBlock > 0 || part.SquareBracket) && !posEOL:
new, err := inject.Rune(line, []rune{'\''}, pos)
if err != nil {
return line, pos
}
return new, pos
case part.QuoteDouble || part.QuoteBrace > 0:
return line, pos // do nothing because QuoteSingle might be an apostrophe
case !part.QuoteSingle && full.QuoteSingle && !posEOL && line[pos+1] == '\'':
return append(line[:pos], line[pos+1:]...), pos
case !part.QuoteSingle && full.QuoteSingle && full.LastCharacter == '\'':
return line[:len(line)-1], pos
case !part.QuoteSingle && !full.QuoteSingle:
return line, pos
case posEOL:
return append(line, '\''), pos
case part.QuoteSingle && full.LastCharacter == '\'':
return line[:len(line)-1], pos
default:
return append(line, '\''), pos
}
case "\"":
switch {
case (part.NestedBlock > 0 || part.SquareBracket) && !posEOL:
new, err := inject.Rune(line, []rune{'"'}, pos)
if err != nil {
return line, pos
}
return new, pos
case part.QuoteSingle || part.QuoteBrace > 0:
// return line, pos
new, err := inject.Rune(line, []rune{'"'}, pos)
if err != nil {
return line, pos
}
return new, pos
case !part.QuoteDouble && full.QuoteDouble && pos < len(line) && line[pos+1] == '"':
return append(line[:pos], line[pos+1:]...), pos
case !part.QuoteDouble && full.QuoteDouble && full.LastCharacter == '"':
return line[:len(line)-1], pos
case !part.QuoteDouble && !full.QuoteDouble:
return line, pos //
case posEOL:
return append(line, '"'), pos
case part.QuoteDouble && full.LastCharacter == '"':
return line[:len(line)-1], pos
default:
return append(line, '"'), pos
}
case "(":
switch {
case part.SquareBracket || part.NestedBlock > 0 ||
full.SquareBracket || full.NestedBlock > 0:
new, err := inject.Rune(line, []rune{')'}, pos+1)
if err != nil {
return line, pos
}
return new, pos
case part.QuoteSingle || part.QuoteDouble:
return line, pos
case full.QuoteBrace == 1 && part.QuoteBrace == 1:
return append(line, ')'), pos
case part.QuoteBrace > 0:
new, err := inject.Rune(line, []rune{')'}, pos+1)
if err != nil {
return line, pos
}
return new, pos
case posEOL:
return append(line, ')'), pos
default:
return line, pos
}
case ")":
if full.QuoteBrace < 0 && part.QuoteBrace == 0 && full.LastCharacter == ')' {
return line[:len(line)-1], pos
}
case "{":
switch {
case part.SquareBracket:
new, err := inject.Rune(line, []rune{'}'}, pos+1)
if err != nil {
return line, pos
}
return new, pos
case part.QuoteSingle || part.QuoteDouble:
return line, pos
case part.QuoteBrace > 0:
new, err := inject.Rune(line, []rune{'}'}, pos+1)
if err != nil {
return line, pos
}
return new, pos
case full.NestedBlock == 1 && part.NestedBlock == 1:
return append(line, '}'), pos
case part.NestedBlock > 0:
new, err := inject.Rune(line, []rune{'}'}, pos+1)
if err != nil {
return line, pos
}
return new, pos
case posEOL:
return append(line, '}'), pos
default:
return line, pos
}
case "}":
if full.NestedBlock < 0 && part.NestedBlock == 0 && full.LastCharacter == '}' {
return line[:len(line)-1], pos
}
case "[":
switch {
case part.QuoteSingle || part.QuoteDouble || part.QuoteBrace > 0 || part.NestedBlock > 0:
new, err := inject.Rune(line, []rune{']'}, pos+1)
if err != nil {
return line, pos
}
return new, pos
case full.SquareBracket && full.NestedBlock == 0 && full.LastCharacter == '[':
return append(line, ']'), pos
case full.FuncName == "[[]" && change == "[" && line[pos+1] == ']':
newLine := append(line[:pos+1], ' ', ' ', ']', ']')
newLine = append(newLine, line[pos+1:]...)
return newLine, pos + 1
}
case "]":
if part.SquareBracket && full.SquareBracket && nextRune == ']' {
return append(line[:pos], line[pos+1:]...), pos
}
}
return line, pos
}