451 lines
11 KiB
Go
451 lines
11 KiB
Go
// Copyright (c) 2014, B3log
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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// Editor manipulations.
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package editor
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import (
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"bytes"
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"encoding/json"
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"net/http"
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"os"
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"os/exec"
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"path/filepath"
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"runtime"
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"strconv"
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"strings"
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"time"
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"github.com/b3log/wide/conf"
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"github.com/b3log/wide/file"
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"github.com/b3log/wide/session"
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"github.com/b3log/wide/util"
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"github.com/golang/glog"
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"github.com/gorilla/websocket"
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)
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// WSHandler handles request of creating editor channel.
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func WSHandler(w http.ResponseWriter, r *http.Request) {
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httpSession, _ := session.HTTPSession.Get(r, "wide-session")
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sid := httpSession.Values["id"].(string)
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conn, _ := websocket.Upgrade(w, r, nil, 1024, 1024)
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editorChan := util.WSChannel{Sid: sid, Conn: conn, Request: r, Time: time.Now()}
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ret := map[string]interface{}{"output": "Editor initialized", "cmd": "init-editor"}
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err := editorChan.Conn.WriteJSON(&ret)
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if nil != err {
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return
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}
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session.EditorWS[sid] = &editorChan
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glog.Infof("Open a new [Editor] with session [%s], %d", sid, len(session.EditorWS))
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args := map[string]interface{}{}
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for {
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if err := session.EditorWS[sid].Conn.ReadJSON(&args); err != nil {
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if err.Error() == "EOF" {
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return
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}
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if err.Error() == "unexpected EOF" {
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return
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}
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glog.Error("Editor WS ERROR: " + err.Error())
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return
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}
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code := args["code"].(string)
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line := int(args["cursorLine"].(float64))
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ch := int(args["cursorCh"].(float64))
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offset := getCursorOffset(code, line, ch)
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// glog.Infof("offset: %d", offset)
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gocode := conf.Wide.GetExecutableInGOBIN("gocode")
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argv := []string{"-f=json", "autocomplete", strconv.Itoa(offset)}
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var output bytes.Buffer
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cmd := exec.Command(gocode, argv...)
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cmd.Stdout = &output
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stdin, _ := cmd.StdinPipe()
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cmd.Start()
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stdin.Write([]byte(code))
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stdin.Close()
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cmd.Wait()
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ret = map[string]interface{}{"output": string(output.Bytes()), "cmd": "autocomplete"}
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if err := session.EditorWS[sid].Conn.WriteJSON(&ret); err != nil {
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glog.Error("Editor WS ERROR: " + err.Error())
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return
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}
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}
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}
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// AutocompleteHandler handles request of code autocompletion.
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func AutocompleteHandler(w http.ResponseWriter, r *http.Request) {
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var args map[string]interface{}
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if err := json.NewDecoder(r.Body).Decode(&args); err != nil {
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glog.Error(err)
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http.Error(w, err.Error(), 500)
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return
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}
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session, _ := session.HTTPSession.Get(r, "wide-session")
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username := session.Values["username"].(string)
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path := args["path"].(string)
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fout, err := os.Create(path)
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if nil != err {
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glog.Error(err)
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http.Error(w, err.Error(), 500)
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return
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}
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code := args["code"].(string)
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fout.WriteString(code)
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if err := fout.Close(); nil != err {
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glog.Error(err)
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http.Error(w, err.Error(), 500)
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return
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}
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line := int(args["cursorLine"].(float64))
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ch := int(args["cursorCh"].(float64))
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offset := getCursorOffset(code, line, ch)
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// glog.Infof("offset: %d", offset)
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userWorkspace := conf.Wide.GetUserWorkspace(username)
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workspaces := filepath.SplitList(userWorkspace)
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libPath := ""
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for _, workspace := range workspaces {
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userLib := workspace + conf.PathSeparator + "pkg" + conf.PathSeparator +
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runtime.GOOS + "_" + runtime.GOARCH
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libPath += userLib + conf.PathListSeparator
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}
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glog.V(5).Infof("gocode set lib-path %s", libPath)
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// FIXME: using gocode set lib-path has some issues while accrossing workspaces
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gocode := conf.Wide.GetExecutableInGOBIN("gocode")
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argv := []string{"set", "lib-path", libPath}
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exec.Command(gocode, argv...).Run()
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argv = []string{"-f=json", "autocomplete", strconv.Itoa(offset)}
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cmd := exec.Command(gocode, argv...)
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stdin, _ := cmd.StdinPipe()
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stdin.Write([]byte(code))
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stdin.Close()
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output, err := cmd.CombinedOutput()
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if nil != err {
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glog.Error(err)
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http.Error(w, err.Error(), 500)
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return
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}
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w.Header().Set("Content-Type", "application/json")
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w.Write(output)
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}
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// GetExprInfoHandler handles request of getting expression infomation.
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func GetExprInfoHandler(w http.ResponseWriter, r *http.Request) {
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data := map[string]interface{}{"succ": true}
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defer util.RetJSON(w, r, data)
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session, _ := session.HTTPSession.Get(r, "wide-session")
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username := session.Values["username"].(string)
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var args map[string]interface{}
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if err := json.NewDecoder(r.Body).Decode(&args); err != nil {
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glog.Error(err)
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http.Error(w, err.Error(), 500)
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return
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}
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path := args["path"].(string)
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curDir := path[:strings.LastIndex(path, conf.PathSeparator)]
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filename := path[strings.LastIndex(path, conf.PathSeparator)+1:]
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fout, err := os.Create(path)
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if nil != err {
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glog.Error(err)
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data["succ"] = false
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return
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}
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code := args["code"].(string)
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fout.WriteString(code)
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if err := fout.Close(); nil != err {
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glog.Error(err)
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data["succ"] = false
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return
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}
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line := int(args["cursorLine"].(float64))
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ch := int(args["cursorCh"].(float64))
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offset := getCursorOffset(code, line, ch)
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// glog.Infof("offset [%d]", offset)
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ide_stub := conf.Wide.GetExecutableInGOBIN("ide_stub")
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argv := []string{"type", "-cursor", filename + ":" + strconv.Itoa(offset), "-info", "."}
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cmd := exec.Command(ide_stub, argv...)
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cmd.Dir = curDir
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setCmdEnv(cmd, username)
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output, err := cmd.CombinedOutput()
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if nil != err {
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glog.Error(err)
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http.Error(w, err.Error(), 500)
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return
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}
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exprInfo := strings.TrimSpace(string(output))
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if "" == exprInfo {
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data["succ"] = false
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return
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}
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data["info"] = exprInfo
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}
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// FindDeclarationHandler handles request of finding declaration.
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func FindDeclarationHandler(w http.ResponseWriter, r *http.Request) {
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data := map[string]interface{}{"succ": true}
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defer util.RetJSON(w, r, data)
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session, _ := session.HTTPSession.Get(r, "wide-session")
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username := session.Values["username"].(string)
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var args map[string]interface{}
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if err := json.NewDecoder(r.Body).Decode(&args); err != nil {
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glog.Error(err)
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http.Error(w, err.Error(), 500)
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return
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}
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path := args["path"].(string)
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curDir := path[:strings.LastIndex(path, conf.PathSeparator)]
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filename := path[strings.LastIndex(path, conf.PathSeparator)+1:]
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fout, err := os.Create(path)
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if nil != err {
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glog.Error(err)
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data["succ"] = false
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return
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}
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code := args["code"].(string)
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fout.WriteString(code)
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if err := fout.Close(); nil != err {
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glog.Error(err)
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data["succ"] = false
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return
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}
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line := int(args["cursorLine"].(float64))
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ch := int(args["cursorCh"].(float64))
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offset := getCursorOffset(code, line, ch)
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// glog.Infof("offset [%d]", offset)
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ide_stub := conf.Wide.GetExecutableInGOBIN("ide_stub")
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argv := []string{"type", "-cursor", filename + ":" + strconv.Itoa(offset), "-def", "."}
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cmd := exec.Command(ide_stub, argv...)
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cmd.Dir = curDir
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setCmdEnv(cmd, username)
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output, err := cmd.CombinedOutput()
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if nil != err {
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glog.Error(err)
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http.Error(w, err.Error(), 500)
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return
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}
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found := strings.TrimSpace(string(output))
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if "" == found {
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data["succ"] = false
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return
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}
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part := found[:strings.LastIndex(found, ":")]
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cursorSep := strings.LastIndex(part, ":")
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path = found[:cursorSep]
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cursorLine, _ := strconv.Atoi(found[cursorSep+1 : strings.LastIndex(found, ":")])
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cursorCh, _ := strconv.Atoi(found[strings.LastIndex(found, ":")+1:])
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data["path"] = path
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data["cursorLine"] = cursorLine
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data["cursorCh"] = cursorCh
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}
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// FindUsagesHandler handles request of finding usages.
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func FindUsagesHandler(w http.ResponseWriter, r *http.Request) {
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data := map[string]interface{}{"succ": true}
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defer util.RetJSON(w, r, data)
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session, _ := session.HTTPSession.Get(r, "wide-session")
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username := session.Values["username"].(string)
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var args map[string]interface{}
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if err := json.NewDecoder(r.Body).Decode(&args); err != nil {
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glog.Error(err)
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http.Error(w, err.Error(), 500)
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return
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}
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filePath := args["path"].(string)
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curDir := filePath[:strings.LastIndex(filePath, conf.PathSeparator)]
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filename := filePath[strings.LastIndex(filePath, conf.PathSeparator)+1:]
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fout, err := os.Create(filePath)
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if nil != err {
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glog.Error(err)
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data["succ"] = false
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return
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}
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code := args["code"].(string)
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fout.WriteString(code)
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if err := fout.Close(); nil != err {
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glog.Error(err)
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data["succ"] = false
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return
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}
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line := int(args["cursorLine"].(float64))
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ch := int(args["cursorCh"].(float64))
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offset := getCursorOffset(code, line, ch)
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// glog.Infof("offset [%d]", offset)
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ide_stub := conf.Wide.GetExecutableInGOBIN("ide_stub")
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argv := []string{"type", "-cursor", filename + ":" + strconv.Itoa(offset), "-use", "."}
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cmd := exec.Command(ide_stub, argv...)
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cmd.Dir = curDir
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setCmdEnv(cmd, username)
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output, err := cmd.CombinedOutput()
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if nil != err {
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glog.Error(err)
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http.Error(w, err.Error(), 500)
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return
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}
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result := strings.TrimSpace(string(output))
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if "" == result {
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data["succ"] = false
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return
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}
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founds := strings.Split(result, "\n")
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usages := []*file.Snippet{}
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for _, found := range founds {
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found = strings.TrimSpace(found)
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part := found[:strings.LastIndex(found, ":")]
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cursorSep := strings.LastIndex(part, ":")
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path := found[:cursorSep]
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cursorLine, _ := strconv.Atoi(found[cursorSep+1 : strings.LastIndex(found, ":")])
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cursorCh, _ := strconv.Atoi(found[strings.LastIndex(found, ":")+1:])
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usage := &file.Snippet{Path: path, Line: cursorLine, Ch: cursorCh, Contents: []string{""}}
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usages = append(usages, usage)
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}
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data["founds"] = usages
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}
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// getCursorOffset calculates the cursor offset.
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//
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// line is the line number, starts with 0 that means the first line
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// ch is the column number, starts with 0 that means the first column
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func getCursorOffset(code string, line, ch int) (offset int) {
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lines := strings.Split(code, "\n")
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// calculate sum length of lines before
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for i := 0; i < line; i++ {
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offset += len(lines[i])
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}
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// calculate length of the current line and column
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curLine := lines[line]
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var buffer bytes.Buffer
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r := []rune(curLine)
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for i := 0; i < ch; i++ {
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buffer.WriteString(string(r[i]))
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}
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offset += len(buffer.String()) // append length of current line
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offset += line // append number of '\n'
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return offset
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}
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func setCmdEnv(cmd *exec.Cmd, username string) {
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userWorkspace := conf.Wide.GetUserWorkspace(username)
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cmd.Env = append(cmd.Env,
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"GOPATH="+userWorkspace,
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"GOOS="+runtime.GOOS,
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"GOARCH="+runtime.GOARCH,
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"GOROOT="+runtime.GOROOT(),
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"PATH="+os.Getenv("PATH"))
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}
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