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|
package parser
import (
"encoding/json"
"os"
)
type Offset struct {
At int32
Len int32
}
type Hovers struct {
File *os.File
Offsets *cache
CurrentOffset int
}
type RawResult struct {
Contents json.RawMessage `json:"contents"`
}
type RawData struct {
Id Id `json:"id"`
Result RawResult `json:"result"`
}
type HoverRef struct {
ResultSetId Id `json:"outV"`
HoverId Id `json:"inV"`
}
type ResultSetRef struct {
ResultSetId Id `json:"outV"`
RefId Id `json:"inV"`
}
func NewHovers() (*Hovers, error) {
file, err := os.CreateTemp("", "hovers")
if err != nil {
return nil, err
}
if err := os.Remove(file.Name()); err != nil {
return nil, err
}
offsets, err := newCache("hovers-indexes", Offset{})
if err != nil {
return nil, err
}
return &Hovers{
File: file,
Offsets: offsets,
CurrentOffset: 0,
}, nil
}
func (h *Hovers) Read(label string, line []byte) error {
switch label {
case "hoverResult":
if err := h.addData(line); err != nil {
return err
}
case "textDocument/hover":
if err := h.addHoverRef(line); err != nil {
return err
}
case "textDocument/references":
if err := h.addResultSetRef(line); err != nil {
return err
}
}
return nil
}
func (h *Hovers) For(refId Id) json.RawMessage {
var offset Offset
if err := h.Offsets.Entry(refId, &offset); err != nil || offset.Len == 0 {
return nil
}
hover := make([]byte, offset.Len)
_, err := h.File.ReadAt(hover, int64(offset.At))
if err != nil {
return nil
}
return json.RawMessage(hover)
}
func (h *Hovers) Close() error {
for _, err := range []error{
h.File.Close(),
h.Offsets.Close(),
} {
if err != nil {
return err
}
}
return nil
}
func (h *Hovers) addData(line []byte) error {
var rawData RawData
if err := json.Unmarshal(line, &rawData); err != nil {
return err
}
codeHovers, err := newCodeHovers(rawData.Result.Contents)
if err != nil {
return err
}
codeHoversData, err := json.Marshal(codeHovers)
if err != nil {
return err
}
n, err := h.File.Write(codeHoversData)
if err != nil {
return err
}
offset := Offset{At: int32(h.CurrentOffset), Len: int32(n)}
h.CurrentOffset += n
return h.Offsets.SetEntry(rawData.Id, &offset)
}
func (h *Hovers) addHoverRef(line []byte) error {
var hoverRef HoverRef
if err := json.Unmarshal(line, &hoverRef); err != nil {
return err
}
var offset Offset
if err := h.Offsets.Entry(hoverRef.HoverId, &offset); err != nil {
return err
}
return h.Offsets.SetEntry(hoverRef.ResultSetId, &offset)
}
func (h *Hovers) addResultSetRef(line []byte) error {
var ref ResultSetRef
if err := json.Unmarshal(line, &ref); err != nil {
return err
}
var offset Offset
if err := h.Offsets.Entry(ref.ResultSetId, &offset); err != nil {
return nil
}
return h.Offsets.SetEntry(ref.RefId, &offset)
}
|
