wide/editor/editors.go

153 lines
3.6 KiB
Go

package editor
import (
"bytes"
"encoding/json"
"net/http"
"os"
"os/exec"
"runtime"
"strconv"
"strings"
"github.com/b3log/wide/conf"
"github.com/b3log/wide/user"
"github.com/golang/glog"
"github.com/gorilla/websocket"
)
var editorWS = map[string]*websocket.Conn{}
func WSHandler(w http.ResponseWriter, r *http.Request) {
session, _ := user.Session.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)
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
}
}
}
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, _ := user.Session.Get(r, "wide-session")
username := session.Values["username"].(string)
code := args["code"].(string)
line := int(args["cursorLine"].(float64))
ch := int(args["cursorCh"].(float64))
offset := getCursorOffset(code, line, ch)
// glog.Infof("offset: %d", offset)
userWorkspace := conf.Wide.UserWorkspaces + string(os.PathSeparator) + username
//glog.Infof("User [%s] workspace [%s]", username, userWorkspace)
userLib := userWorkspace + string(os.PathSeparator) + "pkg" + string(os.PathSeparator) +
runtime.GOOS + "_" + runtime.GOARCH
masterWorkspace := conf.Wide.Workspace
//glog.Infof("Master workspace [%s]", masterWorkspace)
masterLib := masterWorkspace + string(os.PathSeparator) + "pkg" + string(os.PathSeparator) +
runtime.GOOS + "_" + runtime.GOARCH
libPath := userLib + string(os.PathListSeparator) + masterLib
//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
argv := []string{"set", "lib-path", libPath}
cmd := exec.Command("gocode", argv...)
cmd.Start()
//argv = []string{"set", "autobuild", "true"}
//cmd := exec.Command("gocode", argv...)
//cmd.Start()
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)
}
func getCursorOffset(code string, line, ch int) (offset int) {
lines := strings.Split(code, "\n")
for i := 0; i < line; i++ {
offset += len(lines[i])
}
offset += line + ch
return
}