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// In-memory document model for the LSP; tracks text, lines, and applies edits.
package lsp
import (
"strings"
"time"
)
type document struct {
uri string
text string
lines []string
}
func (s *Server) setDocument(uri, text string) {
s.mu.Lock()
defer s.mu.Unlock()
s.docs[uri] = &document{uri: uri, text: text, lines: splitLines(text)}
}
func (s *Server) deleteDocument(uri string) {
s.mu.Lock()
defer s.mu.Unlock()
delete(s.docs, uri)
}
func (s *Server) markActivity() {
s.mu.Lock()
s.lastInput = time.Now()
s.mu.Unlock()
}
func (s *Server) getDocument(uri string) *document {
s.mu.RLock()
defer s.mu.RUnlock()
return s.docs[uri]
}
// splitLines splits the input string into lines, normalizing line endings to '\n'.
func splitLines(sx string) []string {
sx = strings.ReplaceAll(sx, "\r\n", "\n")
return strings.Split(sx, "\n")
}
func (s *Server) lineContext(uri string, pos Position) (above, current, below, funcCtx string) {
d := s.getDocument(uri)
if d == nil || len(d.lines) == 0 {
return "", "", "", ""
}
idx := pos.Line
if idx < 0 {
idx = 0
}
if idx >= len(d.lines) {
idx = len(d.lines) - 1
}
current = d.lines[idx]
if idx-1 >= 0 {
above = d.lines[idx-1]
}
if idx+1 < len(d.lines) {
below = d.lines[idx+1]
}
for i := idx; i >= 0; i-- {
line := strings.TrimSpace(d.lines[i])
if hasAny(line, []string{"func ", "def ", "class ", "fn ", "procedure ", "sub "}) {
funcCtx = line
break
}
}
return above, current, below, funcCtx
}
// isDefiningNewFunction returns true when the cursor appears to be within
// a function declaration/signature and before the opening '{' of the body.
// Heuristic: find nearest preceding line containing "func "; ensure no '{'
// appears before the cursor across those lines.
func (s *Server) isDefiningNewFunction(uri string, pos Position) bool {
d := s.getDocument(uri)
if d == nil || len(d.lines) == 0 {
return false
}
idx := pos.Line
if idx < 0 {
idx = 0
}
if idx >= len(d.lines) {
idx = len(d.lines) - 1
}
// Find signature start
sigStart := -1
for i := idx; i >= 0; i-- {
if strings.Contains(d.lines[i], "func ") {
sigStart = i
break
}
// stop if we hit a closing brace which likely ends a previous block
if strings.Contains(d.lines[i], "}") {
break
}
}
if sigStart == -1 {
return false
}
// Scan for '{' from sigStart up to cursor position; if found before or at cursor, we're in body
for i := sigStart; i <= idx; i++ {
line := d.lines[i]
brace := strings.Index(line, "{")
if brace >= 0 {
if i < idx {
return false // body started on a previous line
}
// same line as cursor: if brace position < cursor character, then already in body
if pos.Character > brace {
return false
}
}
}
return true
}
func hasAny(s string, needles []string) bool {
for _, n := range needles {
if strings.Contains(s, n) {
return true
}
}
return false
}
func trimLen(s string) string {
s = strings.TrimSpace(s)
if len(s) > 200 {
return s[:200] + "…"
}
return s
}
func firstLine(s string) string {
s = strings.ReplaceAll(s, "\r\n", "\n")
if idx := strings.IndexByte(s, '\n'); idx >= 0 {
return s[:idx]
}
return s
}
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