// 编辑器操作. package editor import ( "bytes" "encoding/json" "net/http" "os" "os/exec" "runtime" "strconv" "strings" "github.com/b3log/wide/conf" "github.com/b3log/wide/session" "github.com/b3log/wide/util" "github.com/golang/glog" "github.com/gorilla/websocket" ) var editorWS = map[string]*websocket.Conn{} // 代码片段. 这个结构可用于“查找使用”、“文件搜索”的返回值. type snippet struct { Path string `json:"path"` // 文件路径 Line int `json:"line"` // 行号 Ch int `json:"ch"` // 列号 Contents []string `json:"contents"` // 附近几行 } // 建立编辑器通道. func WSHandler(w http.ResponseWriter, r *http.Request) { session, _ := session.HTTPSession.Get(r, "wide-session") sid := session.Values["id"].(string) editorWS[sid], _ = websocket.Upgrade(w, r, nil, 1024, 1024) ret := map[string]interface{}{"output": "Editor initialized", "cmd": "init-editor"} editorWS[sid].WriteJSON(&ret) glog.Infof("Open a new [Editor] with session [%s], %d", sid, len(editorWS)) args := map[string]interface{}{} for { if err := editorWS[sid].ReadJSON(&args); err != nil { if err.Error() == "EOF" { return } if err.Error() == "unexpected EOF" { return } glog.Error("Editor WS ERROR: " + err.Error()) return } code := args["code"].(string) line := int(args["cursorLine"].(float64)) ch := int(args["cursorCh"].(float64)) offset := getCursorOffset(code, line, ch) // glog.Infof("offset: %d", offset) gocode := conf.Wide.GetGocode() argv := []string{"-f=json", "autocomplete", strconv.Itoa(offset)} var output bytes.Buffer cmd := exec.Command(gocode, argv...) cmd.Stdout = &output stdin, _ := cmd.StdinPipe() cmd.Start() stdin.Write([]byte(code)) stdin.Close() cmd.Wait() ret = map[string]interface{}{"output": string(output.Bytes()), "cmd": "autocomplete"} if err := editorWS[sid].WriteJSON(&ret); err != nil { glog.Error("Editor WS ERROR: " + err.Error()) return } } } // 自动完成(代码补全). func AutocompleteHandler(w http.ResponseWriter, r *http.Request) { decoder := json.NewDecoder(r.Body) var args map[string]interface{} if err := decoder.Decode(&args); err != nil { glog.Error(err) http.Error(w, err.Error(), 500) return } session, _ := session.HTTPSession.Get(r, "wide-session") username := session.Values["username"].(string) path := args["path"].(string) fout, err := os.Create(path) if nil != err { glog.Error(err) http.Error(w, err.Error(), 500) return } code := args["code"].(string) fout.WriteString(code) if err := fout.Close(); nil != err { glog.Error(err) http.Error(w, err.Error(), 500) return } line := int(args["cursorLine"].(float64)) ch := int(args["cursorCh"].(float64)) offset := getCursorOffset(code, line, ch) // glog.Infof("offset: %d", offset) userWorkspace := conf.Wide.GetUserWorkspace(username) //glog.Infof("User [%s] workspace [%s]", username, userWorkspace) userLib := userWorkspace + string(os.PathSeparator) + "pkg" + string(os.PathSeparator) + runtime.GOOS + "_" + runtime.GOARCH libPath := userLib //glog.Infof("gocode set lib-path %s", libPath) // FIXME: 使用 gocode set lib-path 在多工作空间环境下肯定是有问题的,需要考虑其他实现方式 gocode := conf.Wide.GetGocode() argv := []string{"set", "lib-path", libPath} exec.Command(gocode, argv...).Run() argv = []string{"-f=json", "autocomplete", strconv.Itoa(offset)} cmd := exec.Command(gocode, argv...) stdin, _ := cmd.StdinPipe() stdin.Write([]byte(code)) stdin.Close() output, err := cmd.CombinedOutput() if nil != err { glog.Error(err) http.Error(w, err.Error(), 500) return } w.Header().Set("Content-Type", "application/json") w.Write(output) } // 查看表达式信息. func GetExprInfoHandler(w http.ResponseWriter, r *http.Request) { data := map[string]interface{}{"succ": true} defer util.RetJSON(w, r, data) session, _ := session.HTTPSession.Get(r, "wide-session") username := session.Values["username"].(string) decoder := json.NewDecoder(r.Body) var args map[string]interface{} if err := decoder.Decode(&args); err != nil { glog.Error(err) http.Error(w, err.Error(), 500) return } path := args["path"].(string) curDir := path[:strings.LastIndex(path, string(os.PathSeparator))] filename := path[strings.LastIndex(path, string(os.PathSeparator))+1:] fout, err := os.Create(path) if nil != err { glog.Error(err) data["succ"] = false return } code := args["code"].(string) fout.WriteString(code) if err := fout.Close(); nil != err { glog.Error(err) data["succ"] = false return } line := int(args["cursorLine"].(float64)) ch := int(args["cursorCh"].(float64)) offset := getCursorOffset(code, line, ch) glog.Infof("offset [%d]", offset) // TODO: 目前是调用 liteide_stub 工具来查找声明,后续需要重新实现 ide_stub := conf.Wide.GetIDEStub() argv := []string{"type", "-cursor", filename + ":" + strconv.Itoa(offset), "-info", "."} cmd := exec.Command(ide_stub, argv...) cmd.Dir = curDir setCmdEnv(cmd, username) output, err := cmd.CombinedOutput() if nil != err { glog.Error(err) http.Error(w, err.Error(), 500) return } exprInfo := strings.TrimSpace(string(output)) if "" == exprInfo { data["succ"] = false return } data["info"] = exprInfo } // 查找声明. func FindDeclarationHandler(w http.ResponseWriter, r *http.Request) { data := map[string]interface{}{"succ": true} defer util.RetJSON(w, r, data) session, _ := session.HTTPSession.Get(r, "wide-session") username := session.Values["username"].(string) decoder := json.NewDecoder(r.Body) var args map[string]interface{} if err := decoder.Decode(&args); err != nil { glog.Error(err) http.Error(w, err.Error(), 500) return } path := args["path"].(string) curDir := path[:strings.LastIndex(path, string(os.PathSeparator))] filename := path[strings.LastIndex(path, string(os.PathSeparator))+1:] fout, err := os.Create(path) if nil != err { glog.Error(err) data["succ"] = false return } code := args["code"].(string) fout.WriteString(code) if err := fout.Close(); nil != err { glog.Error(err) data["succ"] = false return } line := int(args["cursorLine"].(float64)) ch := int(args["cursorCh"].(float64)) offset := getCursorOffset(code, line, ch) glog.Infof("offset [%d]", offset) // TODO: 目前是调用 liteide_stub 工具来查找声明,后续需要重新实现 ide_stub := conf.Wide.GetIDEStub() argv := []string{"type", "-cursor", filename + ":" + strconv.Itoa(offset), "-def", "."} cmd := exec.Command(ide_stub, argv...) cmd.Dir = curDir setCmdEnv(cmd, username) output, err := cmd.CombinedOutput() if nil != err { glog.Error(err) http.Error(w, err.Error(), 500) return } found := strings.TrimSpace(string(output)) if "" == found { data["succ"] = false return } part := found[:strings.LastIndex(found, ":")] cursorSep := strings.LastIndex(part, ":") path = found[:cursorSep] cursorLine := found[cursorSep+1 : strings.LastIndex(found, ":")] cursorCh := found[strings.LastIndex(found, ":")+1:] data["path"] = path data["cursorLine"] = cursorLine data["cursorCh"] = cursorCh } // 查找使用. func FindUsagesHandler(w http.ResponseWriter, r *http.Request) { data := map[string]interface{}{"succ": true} defer util.RetJSON(w, r, data) session, _ := session.HTTPSession.Get(r, "wide-session") username := session.Values["username"].(string) decoder := json.NewDecoder(r.Body) var args map[string]interface{} if err := decoder.Decode(&args); err != nil { glog.Error(err) http.Error(w, err.Error(), 500) return } filePath := args["path"].(string) curDir := filePath[:strings.LastIndex(filePath, string(os.PathSeparator))] filename := filePath[strings.LastIndex(filePath, string(os.PathSeparator))+1:] fout, err := os.Create(filePath) if nil != err { glog.Error(err) data["succ"] = false return } code := args["code"].(string) fout.WriteString(code) if err := fout.Close(); nil != err { glog.Error(err) data["succ"] = false return } line := int(args["cursorLine"].(float64)) ch := int(args["cursorCh"].(float64)) offset := getCursorOffset(code, line, ch) // TODO: 目前是调用 liteide_stub 工具来查找使用,后续需要重新实现 ide_stub := conf.Wide.GetIDEStub() argv := []string{"type", "-cursor", filename + ":" + strconv.Itoa(offset), "-use", "."} cmd := exec.Command(ide_stub, argv...) cmd.Dir = curDir setCmdEnv(cmd, username) output, err := cmd.CombinedOutput() if nil != err { glog.Error(err) http.Error(w, err.Error(), 500) return } result := strings.TrimSpace(string(output)) if "" == result { data["succ"] = false return } founds := strings.Split(result, "\n") usages := []snippet{} for _, found := range founds { found = strings.TrimSpace(found) part := found[:strings.LastIndex(found, ":")] cursorSep := strings.LastIndex(part, ":") path := found[:cursorSep] cursorLine, _ := strconv.Atoi(found[cursorSep+1 : strings.LastIndex(found, ":")]) cursorCh, _ := strconv.Atoi(found[strings.LastIndex(found, ":")+1:]) usage := snippet{Path: path, Line: cursorLine, Ch: cursorCh /* TODO: 获取附近的代码片段 */} usages = append(usages, usage) } data["usages"] = usages } // 计算光标偏移位置. // // line 指定了行号(第一行为 0),ch 指定了列号(第一列为 0). func getCursorOffset(code string, line, ch int) (offset int) { lines := strings.Split(code, "\n") // 计算前几行长度 for i := 0; i < line; i++ { offset += len(lines[i]) } // 计算当前行、当前列长度 curLine := lines[line] var buffer bytes.Buffer r := []rune(curLine) for i := 0; i < ch; i++ { buffer.WriteString(string(r[i])) } offset += line // 加换行符 offset += len(buffer.String()) // 加当前行列偏移 return offset } func setCmdEnv(cmd *exec.Cmd, username string) { userWorkspace := conf.Wide.GetUserWorkspace(username) cmd.Env = append(cmd.Env, "GOPATH="+userWorkspace, "GOOS="+runtime.GOOS, "GOARCH="+runtime.GOARCH, "GOROOT="+runtime.GOROOT(), "PATH="+os.Getenv("PATH")) }