package main
import (
+ "bytes"
+ "io/ioutil"
"os"
+ "os/exec"
+ "os/signal"
"regexp"
"strings"
+
+ "github.com/mitchellh/go-homedir"
)
-// HandleCommand handles input from the user
-func HandleCommand(input string, view *View) {
- inputCmd := strings.Split(input, " ")[0]
- args := strings.Split(input, " ")[1:]
+type Command struct {
+ action func([]string)
+ completions []Completion
+}
+
+type StrCommand struct {
+ action string
+ completions []Completion
+}
- commands := []string{"set", "quit", "save", "replace"}
+var commands map[string]Command
- i := 0
- cmd := inputCmd
+var commandActions = map[string]func([]string){
+ "Set": Set,
+ "Run": Run,
+ "Bind": Bind,
+ "Quit": Quit,
+ "Save": Save,
+ "Replace": Replace,
+ "VSplit": VSplit,
+ "HSplit": HSplit,
+ "Tab": NewTab,
+ "Help": Help,
+}
- for _, c := range commands {
- if strings.HasPrefix(c, inputCmd) {
- i++
- cmd = c
- }
+// InitCommands initializes the default commands
+func InitCommands() {
+ commands = make(map[string]Command)
+
+ defaults := DefaultCommands()
+ parseCommands(defaults)
+}
+
+func parseCommands(userCommands map[string]StrCommand) {
+ for k, v := range userCommands {
+ MakeCommand(k, v.action, v.completions...)
}
- if i == 1 {
- inputCmd = cmd
+}
+
+// MakeCommand is a function to easily create new commands
+// This can be called by plugins in Lua so that plugins can define their own commands
+func MakeCommand(name, function string, completions ...Completion) {
+ action := commandActions[function]
+ if _, ok := commandActions[function]; !ok {
+ // If the user seems to be binding a function that doesn't exist
+ // We hope that it's a lua function that exists and bind it to that
+ action = LuaFunctionCommand(function)
}
- switch inputCmd {
- case "set":
- SetOption(view, args)
- case "quit":
- if view.CanClose("Quit anyway? ") {
- screen.Fini()
- os.Exit(0)
- }
- case "save":
- view.Save()
- case "replace":
- r := regexp.MustCompile(`"[^"\\]*(?:\\.[^"\\]*)*"|[^\s]*`)
- replaceCmd := r.FindAllString(strings.Join(args, " "), -1)
- if len(replaceCmd) < 2 {
- messenger.Error("Invalid replace statement: " + strings.Join(args, " "))
- return
+ commands[name] = Command{action, completions}
+}
+
+// DefaultCommands returns a map containing micro's default commands
+func DefaultCommands() map[string]StrCommand {
+ return map[string]StrCommand{
+ "set": StrCommand{"Set", []Completion{OptionCompletion, NoCompletion}},
+ "bind": StrCommand{"Bind", []Completion{NoCompletion}},
+ "run": StrCommand{"Run", []Completion{NoCompletion}},
+ "quit": StrCommand{"Quit", []Completion{NoCompletion}},
+ "save": StrCommand{"Save", []Completion{NoCompletion}},
+ "replace": StrCommand{"Replace", []Completion{NoCompletion}},
+ "vsplit": StrCommand{"VSplit", []Completion{FileCompletion, NoCompletion}},
+ "hsplit": StrCommand{"HSplit", []Completion{FileCompletion, NoCompletion}},
+ "tab": StrCommand{"Tab", []Completion{FileCompletion, NoCompletion}},
+ "help": StrCommand{"Help", []Completion{HelpCompletion, NoCompletion}},
+ }
+}
+
+// Help tries to open the given help page in a horizontal split
+func Help(args []string) {
+ if len(args) < 1 {
+ // Open the default help if the user just typed "> help"
+ CurView().openHelp("help")
+ } else {
+ helpPage := args[0]
+ if _, ok := helpPages[helpPage]; ok {
+ CurView().openHelp(helpPage)
+ } else {
+ messenger.Error("Sorry, no help for ", helpPage)
}
+ }
+}
+
+// VSplit opens a vertical split with file given in the first argument
+// If no file is given, it opens an empty buffer in a new split
+func VSplit(args []string) {
+ if len(args) == 0 {
+ CurView().VSplit(NewBuffer([]byte{}, ""))
+ } else {
+ filename := args[0]
+ home, _ := homedir.Dir()
+ filename = strings.Replace(filename, "~", home, 1)
+ file, err := ioutil.ReadFile(filename)
- var flags string
- if len(replaceCmd) == 3 {
- // The user included some flags
- flags = replaceCmd[2]
+ var buf *Buffer
+ if err != nil {
+ // File does not exist -- create an empty buffer with that name
+ buf = NewBuffer([]byte{}, filename)
+ } else {
+ buf = NewBuffer(file, filename)
}
+ CurView().VSplit(buf)
+ }
+}
- search := string(replaceCmd[0])
- replace := string(replaceCmd[1])
+// HSplit opens a horizontal split with file given in the first argument
+// If no file is given, it opens an empty buffer in a new split
+func HSplit(args []string) {
+ if len(args) == 0 {
+ CurView().HSplit(NewBuffer([]byte{}, ""))
+ } else {
+ filename := args[0]
+ home, _ := homedir.Dir()
+ filename = strings.Replace(filename, "~", home, 1)
+ file, err := ioutil.ReadFile(filename)
- if strings.HasPrefix(search, `"`) && strings.HasSuffix(search, `"`) {
- search = search[1 : len(search)-1]
+ var buf *Buffer
+ if err != nil {
+ // File does not exist -- create an empty buffer with that name
+ buf = NewBuffer([]byte{}, filename)
+ } else {
+ buf = NewBuffer(file, filename)
}
- if strings.HasPrefix(replace, `"`) && strings.HasSuffix(replace, `"`) {
- replace = replace[1 : len(replace)-1]
+ CurView().HSplit(buf)
+ }
+}
+
+// NewTab opens the given file in a new tab
+func NewTab(args []string) {
+ if len(args) == 0 {
+ CurView().AddTab(true)
+ } else {
+ filename := args[0]
+ home, _ := homedir.Dir()
+ filename = strings.Replace(filename, "~", home, 1)
+ file, _ := ioutil.ReadFile(filename)
+
+ tab := NewTabFromView(NewView(NewBuffer(file, filename)))
+ tab.SetNum(len(tabs))
+ tabs = append(tabs, tab)
+ curTab++
+ if len(tabs) == 2 {
+ for _, t := range tabs {
+ for _, v := range t.views {
+ v.ToggleTabbar()
+ }
+ }
}
+ }
+}
- search = strings.Replace(search, `\"`, `"`, -1)
- replace = strings.Replace(replace, `\"`, `"`, -1)
+// Set sets an option
+func Set(args []string) {
+ if len(args) < 2 {
+ return
+ }
- // messenger.Error(search + " -> " + replace)
+ option := strings.TrimSpace(args[0])
+ value := strings.TrimSpace(args[1])
- regex, err := regexp.Compile(search)
- if err != nil {
- messenger.Error(err.Error())
- return
- }
+ SetOptionAndSettings(option, value)
+}
+
+// Bind creates a new keybinding
+func Bind(args []string) {
+ if len(args) != 2 {
+ messenger.Error("Incorrect number of arguments")
+ return
+ }
+ BindKey(args[0], args[1])
+}
+
+// Run runs a shell command in the background
+func Run(args []string) {
+ // Run a shell command in the background (openTerm is false)
+ HandleShellCommand(strings.Join(args, " "), false)
+}
+
+// Quit closes the main view
+func Quit(args []string) {
+ // Close the main view
+ CurView().Quit(true)
+}
- found := false
- for {
- match := regex.FindStringIndex(view.buf.text)
- if match == nil {
- break
+// Save saves the buffer in the main view
+func Save(args []string) {
+ // Save the main view
+ CurView().Save(true)
+}
+
+// Replace runs search and replace
+func Replace(args []string) {
+ // This is a regex to parse the replace expression
+ // We allow no quotes if there are no spaces, but if you want to search
+ // for or replace an expression with spaces, you can add double quotes
+ r := regexp.MustCompile(`"[^"\\]*(?:\\.[^"\\]*)*"|[^\s]*`)
+ replaceCmd := r.FindAllString(strings.Join(args, " "), -1)
+ if len(replaceCmd) < 2 {
+ // We need to find both a search and replace expression
+ messenger.Error("Invalid replace statement: " + strings.Join(args, " "))
+ return
+ }
+
+ var flags string
+ if len(replaceCmd) == 3 {
+ // The user included some flags
+ flags = replaceCmd[2]
+ }
+
+ search := string(replaceCmd[0])
+ replace := string(replaceCmd[1])
+
+ // If the search and replace expressions have quotes, we need to remove those
+ if strings.HasPrefix(search, `"`) && strings.HasSuffix(search, `"`) {
+ search = search[1 : len(search)-1]
+ }
+ if strings.HasPrefix(replace, `"`) && strings.HasSuffix(replace, `"`) {
+ replace = replace[1 : len(replace)-1]
+ }
+
+ // We replace all escaped double quotes to real double quotes
+ search = strings.Replace(search, `\"`, `"`, -1)
+ replace = strings.Replace(replace, `\"`, `"`, -1)
+ // Replace some things so users can actually insert newlines and tabs in replacements
+ replace = strings.Replace(replace, "\\n", "\n", -1)
+ replace = strings.Replace(replace, "\\t", "\t", -1)
+
+ regex, err := regexp.Compile(search)
+ if err != nil {
+ // There was an error with the user's regex
+ messenger.Error(err.Error())
+ return
+ }
+
+ view := CurView()
+
+ found := 0
+ for {
+ match := regex.FindStringIndex(view.Buf.String())
+ if match == nil {
+ break
+ }
+ found++
+ if strings.Contains(flags, "c") {
+ // The 'check' flag was used
+ Search(search, view, true)
+ view.Relocate()
+ if settings["syntax"].(bool) {
+ view.matches = Match(view)
}
- found = true
- if strings.Contains(flags, "c") {
- // // The 'check' flag was used
- // if messenger.YesNoPrompt("Perform replacement?") {
- // view.eh.Replace(match[0], match[1], replace)
- // } else {
- // continue
- // }
+ RedrawAll()
+ choice, canceled := messenger.YesNoPrompt("Perform replacement? (y,n)")
+ if canceled {
+ if view.Cursor.HasSelection() {
+ view.Cursor.Loc = view.Cursor.CurSelection[0]
+ view.Cursor.ResetSelection()
+ }
+ messenger.Reset()
+ return
}
- view.eh.Replace(match[0], match[1], replace)
- }
- if !found {
- messenger.Message("Nothing matched " + search)
+ if choice {
+ view.Cursor.DeleteSelection()
+ view.Buf.Insert(FromCharPos(match[0], view.Buf), replace)
+ view.Cursor.ResetSelection()
+ messenger.Reset()
+ } else {
+ if view.Cursor.HasSelection() {
+ searchStart = ToCharPos(view.Cursor.CurSelection[1], view.Buf)
+ } else {
+ searchStart = ToCharPos(view.Cursor.Loc, view.Buf)
+ }
+ continue
+ }
+ } else {
+ view.Buf.Replace(FromCharPos(match[0], view.Buf), FromCharPos(match[1], view.Buf), replace)
}
- default:
- messenger.Error("Unknown command: " + inputCmd)
+ }
+ view.Cursor.Relocate()
+
+ if found > 1 {
+ messenger.Message("Replaced ", found, " occurences of ", search)
+ } else if found == 1 {
+ messenger.Message("Replaced ", found, " occurence of ", search)
+ } else {
+ messenger.Message("Nothing matched ", search)
+ }
+}
+
+// RunShellCommand executes a shell command and returns the output/error
+func RunShellCommand(input string) (string, error) {
+ inputCmd := strings.Split(input, " ")[0]
+ args := strings.Split(input, " ")[1:]
+
+ cmd := exec.Command(inputCmd, args...)
+ outputBytes := &bytes.Buffer{}
+ cmd.Stdout = outputBytes
+ cmd.Stderr = outputBytes
+ cmd.Start()
+ err := cmd.Wait() // wait for command to finish
+ outstring := outputBytes.String()
+ return outstring, err
+}
+
+// HandleShellCommand runs the shell command
+// The openTerm argument specifies whether a terminal should be opened (for viewing output
+// or interacting with stdin)
+func HandleShellCommand(input string, openTerm bool) {
+ inputCmd := strings.Split(input, " ")[0]
+ if !openTerm {
+ // Simply run the command in the background and notify the user when it's done
+ messenger.Message("Running...")
+ go func() {
+ output, err := RunShellCommand(input)
+ totalLines := strings.Split(output, "\n")
+
+ if len(totalLines) < 3 {
+ if err == nil {
+ messenger.Message(inputCmd, " exited without error")
+ } else {
+ messenger.Message(inputCmd, " exited with error: ", err, ": ", output)
+ }
+ } else {
+ messenger.Message(output)
+ }
+ // We have to make sure to redraw
+ RedrawAll()
+ }()
+ } else {
+ // Shut down the screen because we're going to interact directly with the shell
+ screen.Fini()
+ screen = nil
+
+ args := strings.Split(input, " ")[1:]
+
+ // Set up everything for the command
+ cmd := exec.Command(inputCmd, args...)
+ cmd.Stdin = os.Stdin
+ cmd.Stdout = os.Stdout
+ cmd.Stderr = os.Stderr
+
+ // This is a trap for Ctrl-C so that it doesn't kill micro
+ // Instead we trap Ctrl-C to kill the program we're running
+ c := make(chan os.Signal, 1)
+ signal.Notify(c, os.Interrupt)
+ go func() {
+ for range c {
+ cmd.Process.Kill()
+ }
+ }()
+
+ // Start the command
+ cmd.Start()
+ cmd.Wait()
+
+ // This is just so we don't return right away and let the user press enter to return
+ TermMessage("")
+
+ // Start the screen back up
+ InitScreen()
+ }
+}
+
+// HandleCommand handles input from the user
+func HandleCommand(input string) {
+ inputCmd := strings.Split(input, " ")[0]
+ args := strings.Split(input, " ")[1:]
+
+ if _, ok := commands[inputCmd]; !ok {
+ messenger.Error("Unkown command ", inputCmd)
+ } else {
+ commands[inputCmd].action(args)
}
}
projects / micro.git / blobdiff