"os"
"runtime"
+ "github.com/atotto/clipboard"
"github.com/go-errors/errors"
"github.com/layeh/gopher-luar"
"github.com/mattn/go-isatty"
)
const (
- // How many lines up to look to do syntax highlighting
- synLinesUp = 75
- // How many lines down to look to do syntax highlighting
- synLinesDown = 75
- // How many milliseconds to wait before a second click is not a double click
- doubleClickThreshold = 400
- // If two events are less than n milliseconds apart, undo both of them
- undoThreshold = int(settings["undothreshold"].(float64))
+ synLinesUp = 75 // How many lines up to look to do syntax highlighting
+ synLinesDown = 75 // How many lines down to look to do syntax highlighting
+ doubleClickThreshold = 400 // How many milliseconds to wait before a second click is not a double click
+ undoThreshold = 500 // If two events are less than n milliseconds apart, undo both of them
)
var (
// Object to send messages and prompts to the user
messenger *Messenger
- // The default style
+ // The default highlighting style
+ // This simply defines the default foreground and background colors
defStyle tcell.Style
// Where the user's configuration is
// If $XDG_CONFIG_HOME is not set, it is ~/.config/micro
configDir string
- // Version is the version number.
- // This should be set by the linker
+ // Version is the version number or commit hash
+ // This should be set by the linker when compiling
Version = "Unknown"
- // Is the help screen open
- helpOpen = false
-
// L is the lua state
+ // This is the VM that runs the plugins
L *lua.LState
+
+ // The list of views
+ tabs []*Tab
+ // This is the currently open tab
+ // It's just an index to the tab in the tabs array
+ curTab int
+
+ // Channel of jobs running in the background
+ jobs chan JobFunction
+ // Event channel
+ events chan tcell.Event
)
-// LoadInput loads the file input for the editor
-func LoadInput() (string, []byte, error) {
+// LoadInput determines which files should be loaded into buffers
+// based on the input stored in os.Args
+func LoadInput() []*Buffer {
// There are a number of ways micro should start given its input
- // 1. If it is given a file in os.Args, it should open that
+
+ // 1. If it is given a files in os.Args, it should open those
// 2. If there is no input file and the input is not a terminal, that means
// something is being piped in and the stdin should be opened in an
// 3. If there is no input file and the input is a terminal, an empty buffer
// should be opened
- // These are empty by default so if we get to option 3, we can just returns the
- // default values
var filename string
var input []byte
var err error
+ var buffers []*Buffer
if len(os.Args) > 1 {
// Option 1
- filename = os.Args[1]
- // Check that the file exists
- if _, e := os.Stat(filename); e == nil {
- input, err = ioutil.ReadFile(filename)
+ // We go through each file and load it
+ for i := 1; i < len(os.Args); i++ {
+ filename = os.Args[i]
+ // Check that the file exists
+ if _, e := os.Stat(filename); e == nil {
+ // If it exists we load it into a buffer
+ input, err = ioutil.ReadFile(filename)
+ if err != nil {
+ TermMessage(err)
+ continue
+ }
+ }
+ // If the file didn't exist, input will be empty, and we'll open an empty buffer
+ buffers = append(buffers, NewBuffer(input, filename))
}
} else if !isatty.IsTerminal(os.Stdin.Fd()) {
// Option 2
// The input is not a terminal, so something is being piped in
// and we should read from stdin
input, err = ioutil.ReadAll(os.Stdin)
+ buffers = append(buffers, NewBuffer(input, filename))
+ } else {
+ // Option 3, just open an empty buffer
+ buffers = append(buffers, NewBuffer(input, filename))
}
- // Option 3, or just return whatever we got
- return filename, input, err
+ return buffers
}
-// InitConfigDir finds the configuration directory for micro according to the
-// XDG spec.
+// InitConfigDir finds the configuration directory for micro according to the XDG spec.
// If no directory is found, it creates one.
func InitConfigDir() {
xdgHome := os.Getenv("XDG_CONFIG_HOME")
if xdgHome == "" {
+ // The user has not set $XDG_CONFIG_HOME so we should act like it was set to ~/.config
home, err := homedir.Dir()
if err != nil {
- TermMessage("Error finding your home directory\nCan't load syntax files")
+ TermMessage("Error finding your home directory\nCan't load config files")
return
}
xdgHome = home + "/.config"
configDir = xdgHome + "/micro"
if _, err := os.Stat(xdgHome); os.IsNotExist(err) {
+ // If the xdgHome doesn't exist we should create it
err = os.Mkdir(xdgHome, os.ModePerm)
if err != nil {
TermMessage("Error creating XDG_CONFIG_HOME directory: " + err.Error())
}
if _, err := os.Stat(configDir); os.IsNotExist(err) {
+ // If the micro specific config directory doesn't exist we should create that too
err = os.Mkdir(configDir, os.ModePerm)
if err != nil {
TermMessage("Error creating configuration directory: " + err.Error())
os.Setenv("TERM", oldTerm)
}
- // Default style
- defStyle = tcell.StyleDefault.
- Foreground(tcell.ColorDefault).
- Background(tcell.ColorDefault)
-
- // There may be another default style defined in the colorscheme
- if style, ok := colorscheme["default"]; ok {
- defStyle = style
- }
-
screen.SetStyle(defStyle)
screen.EnableMouse()
}
-// Redraw redraws the screen and the given view
-func Redraw(view *View) {
- screen.Clear()
- view.Display()
+// RedrawAll redraws everything -- all the views and the messenger
+func RedrawAll() {
+ messenger.Clear()
+ for _, v := range tabs[curTab].views {
+ v.Display()
+ }
+ DisplayTabs()
messenger.Display()
screen.Show()
}
-var flagVersion = flag.Bool("version", false, "Show version number")
+// Passing -version as a flag will have micro print out the version number
+var flagVersion = flag.Bool("version", false, "Show the version number")
func main() {
flag.Parse()
if *flagVersion {
+ // If -version was passed
fmt.Println("Micro version:", Version)
os.Exit(0)
}
- filename, input, err := LoadInput()
- if err != nil {
- fmt.Println(err)
- os.Exit(1)
- }
-
+ // Start the Lua VM for running plugins
L = lua.NewState()
defer L.Close()
+ // Some encoding stuff in case the user isn't using UTF-8
encoding.Register()
tcell.SetEncodingFallback(tcell.EncodingFallbackASCII)
// Find the user's configuration directory (probably $XDG_CONFIG_HOME/micro)
InitConfigDir()
+
// Load the user's settings
InitSettings()
+ InitCommands()
InitBindings()
+
// Load the syntax files, including the colorscheme
LoadSyntaxFiles()
+
// Load the help files
LoadHelp()
- buf := NewBuffer(string(input), filename)
-
+ // Start the screen
InitScreen()
// This is just so if we have an error, we can exit cleanly and not completely
// mess up the terminal being worked in
+ // In other words we need to shut down tcell before the program crashes
defer func() {
if err := recover(); err != nil {
screen.Fini()
}
}()
+ // Create a new messenger
+ // This is used for sending the user messages in the bottom of the editor
messenger = new(Messenger)
- view := NewView(buf)
+ messenger.history = make(map[string][]string)
+
+ // Now we load the input
+ buffers := LoadInput()
+ for _, buf := range buffers {
+ // For each buffer we create a new tab and place the view in that tab
+ tab := NewTabFromView(NewView(buf))
+ tab.SetNum(len(tabs))
+ tabs = append(tabs, tab)
+ for _, t := range tabs {
+ for _, v := range t.views {
+ v.Resize(screen.Size())
+ }
+ }
+ }
+ // Load all the plugin stuff
+ // We give plugins access to a bunch of variables here which could be useful to them
L.SetGlobal("OS", luar.New(L, runtime.GOOS))
- L.SetGlobal("view", luar.New(L, view))
+ L.SetGlobal("tabs", luar.New(L, tabs))
+ L.SetGlobal("curTab", luar.New(L, curTab))
L.SetGlobal("messenger", luar.New(L, messenger))
L.SetGlobal("GetOption", luar.New(L, GetOption))
L.SetGlobal("AddOption", luar.New(L, AddOption))
+ L.SetGlobal("BindKey", luar.New(L, BindKey))
+ L.SetGlobal("MakeCommand", luar.New(L, MakeCommand))
+ L.SetGlobal("CurView", luar.New(L, CurView))
+ L.SetGlobal("IsWordChar", luar.New(L, IsWordChar))
+
+ // Used for asynchronous jobs
+ L.SetGlobal("JobStart", luar.New(L, JobStart))
+ L.SetGlobal("JobSend", luar.New(L, JobSend))
+ L.SetGlobal("JobStop", luar.New(L, JobStop))
LoadPlugins()
+ jobs = make(chan JobFunction, 100)
+ events = make(chan tcell.Event)
+
+ // Here is the event loop which runs in a separate thread
+ go func() {
+ for {
+ events <- screen.PollEvent()
+ }
+ }()
+
for {
// Display everything
- Redraw(view)
+ RedrawAll()
- // Wait for the user's action
- event := screen.PollEvent()
+ var event tcell.Event
- if searching {
- HandleSearchEvent(event, view)
- } else {
- // Check if we should quit
- switch e := event.(type) {
- case *tcell.EventKey:
- switch e.Key() {
- case tcell.KeyCtrlQ:
- // Make sure not to quit if there are unsaved changes
- if helpOpen {
- view.OpenBuffer(buf)
- helpOpen = false
- } else {
- if view.CanClose("Quit anyway? (yes, no, save) ") {
- screen.Fini()
- os.Exit(0)
- }
- }
- case tcell.KeyCtrlE:
- input, canceled := messenger.Prompt("> ")
- if !canceled {
- HandleCommand(input, view)
- }
- case tcell.KeyCtrlB:
- input, canceled := messenger.Prompt("$ ")
- if !canceled {
- HandleShellCommand(input, view, true)
- }
- case tcell.KeyCtrlG:
- if !helpOpen {
- helpBuffer := NewBuffer(helpTxt, "help.md")
- helpBuffer.Name = "Help"
- helpOpen = true
- view.OpenBuffer(helpBuffer)
- } else {
- view.OpenBuffer(buf)
- helpOpen = false
+ // Check for new events
+ select {
+ case f := <-jobs:
+ // If a new job has finished while running in the background we should execute the callback
+ f.function(f.output, f.args...)
+ continue
+ case event = <-events:
+ }
+
+ switch e := event.(type) {
+ case *tcell.EventMouse:
+ if e.Buttons() == tcell.Button1 {
+ // If the user left clicked we check a couple things
+ _, h := screen.Size()
+ x, y := e.Position()
+ if y == h-1 && messenger.message != "" {
+ // If the user clicked in the bottom bar, and there is a message down there
+ // we copy it to the clipboard.
+ // Often error messages are displayed down there so it can be useful to easily
+ // copy the message
+ clipboard.WriteAll(messenger.message)
+ continue
+ }
+
+ // We loop through each view in the current tab and make sure the current view
+ // it the one being clicked in
+ for _, v := range tabs[curTab].views {
+ if x >= v.x && x < v.x+v.width && y >= v.y && y < v.y+v.height {
+ tabs[curTab].curView = v.Num
}
}
}
+ }
+
+ // This function checks the mouse event for the possibility of changing the current tab
+ // If the tab was changed it returns true
+ if TabbarHandleMouseEvent(event) {
+ continue
+ }
+ if searching {
+ // Since searching is done in real time, we need to redraw every time
+ // there is a new event in the search bar so we need a special function
+ // to run instead of the standard HandleEvent.
+ HandleSearchEvent(event, CurView())
+ } else {
// Send it to the view
- view.HandleEvent(event)
+ CurView().HandleEvent(event)
}
}
}
projects / micro.git / blobdiff