Implement searching

cmd/micro/action/actions.go

@@ -1,6 +1,7 @@
 package action
 
 import (
+	"log"
 	"os"
 	"strings"
 	"time"
@@ -560,6 +561,37 @@ func (h *BufHandler) SaveAs() bool {
 
 // Find opens a prompt and searches forward for the input
 func (h *BufHandler) Find() bool {
+	InfoBar.Prompt("Find: ", "", func(resp string) {
+		match, found, _ := h.Buf.FindNext(resp, h.Cursor.Loc, true)
+		if found {
+			h.Cursor.SetSelectionStart(match[0])
+			h.Cursor.SetSelectionEnd(match[1])
+			h.Cursor.OrigSelection[0] = h.Cursor.CurSelection[0]
+			h.Cursor.OrigSelection[1] = h.Cursor.CurSelection[1]
+		} else {
+			log.Println("RESET")
+			h.Cursor.ResetSelection()
+		}
+	}, func(resp string, canceled bool) {
+		if !canceled {
+			match, found, err := h.Buf.FindNext(resp, h.Cursor.Loc, true)
+			if err != nil {
+				InfoBar.Error(err)
+			}
+			if found {
+				h.Cursor.SetSelectionStart(match[0])
+				h.Cursor.SetSelectionEnd(match[1])
+				h.Cursor.OrigSelection[0] = h.Cursor.CurSelection[0]
+				h.Cursor.OrigSelection[1] = h.Cursor.CurSelection[1]
+				h.Cursor.Loc = h.Cursor.CurSelection[1]
+			} else {
+				h.Cursor.ResetSelection()
+			}
+		} else {
+			h.Cursor.ResetSelection()
+		}
+	})
+
 	return true
 }
 
@@ -725,7 +757,7 @@ func (h *BufHandler) SelectAll() bool {
 
 // OpenFile opens a new file in the buffer
 func (h *BufHandler) OpenFile() bool {
-	InfoBar.Prompt("> ", "open ", func(resp string, canceled bool) {
+	InfoBar.Prompt("> ", "open ", nil, func(resp string, canceled bool) {
 		if !canceled {
 			HandleCommand(resp)
 		}
@@ -889,7 +921,7 @@ func (h *BufHandler) ShellMode() bool {
 
 // CommandMode lets the user enter a command
 func (h *BufHandler) CommandMode() bool {
-	InfoBar.Prompt("> ", "", func(resp string, canceled bool) {
+	InfoBar.Prompt("> ", "", nil, func(resp string, canceled bool) {
 		if !canceled {
 			HandleCommand(resp)
 		}

cmd/micro/action/bindings.go

@@ -103,7 +103,8 @@ modSearch:
 		k = string(unicode.ToUpper(rune(k[0]))) + k[1:]
 		if code, ok := keyEvents["Ctrl"+k]; ok {
 			var r tcell.Key
-			if code < 256 {
+			// Special case for escape, for some reason tcell doesn't send it with the esc character
+			if code < 256 && code != 27 {
 				r = code
 			}
 			// It is, we're done.
@@ -118,7 +119,8 @@ modSearch:
 	// See if we can find the key in bindingKeys
 	if code, ok := keyEvents[k]; ok {
 		var r tcell.Key
-		if code < 256 {
+		// Special case for escape, for some reason tcell doesn't send it with the esc character
+		if code < 256 && code != 27 {
 			r = code
 		}
 		return KeyEvent{

cmd/micro/action/bufhandler.go

@@ -22,6 +22,7 @@ func init() {
 	BufMouseBindings = make(map[MouseEvent]BufMouseAction)
 }
 
+// BufMapKey maps a key event to an action
 func BufMapKey(k KeyEvent, action string) {
 	if f, ok := BufKeyActions[action]; ok {
 		BufKeyStrings[k] = action
@@ -30,6 +31,8 @@ func BufMapKey(k KeyEvent, action string) {
 		util.TermMessage("Error:", action, "does not exist")
 	}
 }
+
+// BufMapMouse maps a mouse event to an action
 func BufMapMouse(k MouseEvent, action string) {
 	if f, ok := BufMouseActions[action]; ok {
 		BufMouseBindings[k] = f
@@ -147,10 +150,13 @@ func (h *BufHandler) HandleEvent(event tcell.Event) {
 	}
 }
 
+// DoKeyEvent executes a key event by finding the action it is bound
+// to and executing it (possibly multiple times for multiple cursors)
 func (h *BufHandler) DoKeyEvent(e KeyEvent) bool {
 	if action, ok := BufKeyBindings[e]; ok {
-		for _, a := range MultiActions {
-			if a == BufKeyStrings[e] {
+		estr := BufKeyStrings[e]
+		for _, s := range MultiActions {
+			if s == estr {
 				cursors := h.Buf.GetCursors()
 				for _, c := range cursors {
 					h.Buf.SetCurCursor(c.Num)
@@ -170,6 +176,8 @@ func (h *BufHandler) DoKeyEvent(e KeyEvent) bool {
 	return false
 }
 
+// DoMouseEvent executes a mouse event by finding the action it is bound
+// to and executing it
 func (h *BufHandler) DoMouseEvent(e MouseEvent, te *tcell.EventMouse) bool {
 	if action, ok := BufMouseBindings[e]; ok {
 		if action(h, te) {
@@ -180,6 +188,8 @@ func (h *BufHandler) DoMouseEvent(e MouseEvent, te *tcell.EventMouse) bool {
 	return false
 }
 
+// DoRuneInsert inserts a given rune into the current buffer
+// (possibly multiple times for multiple cursors)
 func (h *BufHandler) DoRuneInsert(r rune) {
 	cursors := h.Buf.GetCursors()
 	for _, c := range cursors {
@@ -199,6 +209,7 @@ func (h *BufHandler) DoRuneInsert(r rune) {
 	}
 }
 
+// BufKeyActions contains the list of all possible key actions the bufhandler could execute
 var BufKeyActions = map[string]BufKeyAction{
 	"CursorUp":               (*BufHandler).CursorUp,
 	"CursorDown":             (*BufHandler).CursorDown,
@@ -297,13 +308,13 @@ var BufKeyActions = map[string]BufKeyAction{
 	// This was changed to InsertNewline but I don't want to break backwards compatibility
 	"InsertEnter": (*BufHandler).InsertNewline,
 }
+
+// BufMouseActions contains the list of all possible mouse actions the bufhandler could execute
 var BufMouseActions = map[string]BufMouseAction{
 	"MousePress":       (*BufHandler).MousePress,
 	"MouseMultiCursor": (*BufHandler).MouseMultiCursor,
 }
 
-const funcPrefixLen = 21 // length of "action.(*BufHandler)."
-
 // MultiActions is a list of actions that should be executed multiple
 // times if there are multiple cursors (one per cursor)
 // Generally actions that modify global editor state like quitting or

cmd/micro/action/command.go

@@ -119,7 +119,7 @@ func DefaultCommands() map[string]StrCommand {
 // enter
 func CommandEditAction(prompt string) BufKeyAction {
 	return func(h *BufHandler) bool {
-		InfoBar.Prompt("> ", prompt, func(resp string, canceled bool) {
+		InfoBar.Prompt("> ", prompt, nil, func(resp string, canceled bool) {
 			if !canceled {
 				HandleCommand(resp)
 			}

cmd/micro/action/editpane.go

@@ -8,12 +8,12 @@ import (
 
 type EditPane struct {
 	display.Window
-	Handler
+	*BufHandler
 }
 
 type InfoPane struct {
 	display.Window
-	Handler
+	*InfoHandler
 	*info.InfoBuf
 }
 
@@ -22,7 +22,7 @@ func NewBufEditPane(x, y, width, height int, b *buffer.Buffer) *EditPane {
 	// TODO: can probably replace editpane with bufhandler entirely
 	w := display.NewBufWindow(x, y, width, height, b)
 	e.Window = w
-	e.Handler = NewBufHandler(b, w)
+	e.BufHandler = NewBufHandler(b, w)
 
 	return e
 }
@@ -32,7 +32,7 @@ func NewInfoBar() *InfoPane {
 	ib := info.NewBuffer()
 	w := display.NewInfoWindow(ib)
 	e.Window = w
-	e.Handler = NewBufHandler(ib.Buffer, w)
+	e.InfoHandler = NewInfoHandler(ib, w)
 	e.InfoBuf = ib
 
 	return e

cmd/micro/action/infohandler.go

@@ -0,0 +1,158 @@
+package action
+
+import (
+	"strings"
+
+	"github.com/zyedidia/micro/cmd/micro/display"
+	"github.com/zyedidia/micro/cmd/micro/info"
+	"github.com/zyedidia/tcell"
+)
+
+type InfoKeyAction func(*InfoHandler)
+
+type InfoHandler struct {
+	*BufHandler
+	*info.InfoBuf
+}
+
+func NewInfoHandler(ib *info.InfoBuf, w display.Window) *InfoHandler {
+	ih := new(InfoHandler)
+	ih.InfoBuf = ib
+	ih.BufHandler = NewBufHandler(ib.Buffer, w)
+
+	return ih
+}
+
+func (h *InfoHandler) HandleEvent(event tcell.Event) {
+	switch e := event.(type) {
+	case *tcell.EventKey:
+		ke := KeyEvent{
+			code: e.Key(),
+			mod:  e.Modifiers(),
+			r:    e.Rune(),
+		}
+
+		done := h.DoKeyEvent(ke)
+		if !done && e.Key() == tcell.KeyRune {
+			h.DoRuneInsert(e.Rune())
+		}
+	case *tcell.EventMouse:
+		h.BufHandler.HandleEvent(event)
+	}
+}
+
+func (h *InfoHandler) DoKeyEvent(e KeyEvent) bool {
+	done := false
+	if action, ok := BufKeyBindings[e]; ok {
+		estr := BufKeyStrings[e]
+		for _, s := range InfoNones {
+			if s == estr {
+				return false
+			}
+		}
+		for s, a := range InfoOverrides {
+			if s == estr {
+				done = true
+				a(h)
+				break
+			}
+		}
+		if !done {
+			done = action(h.BufHandler)
+		}
+	}
+	if done && h.EventCallback != nil {
+		h.EventCallback(strings.TrimSpace(string(h.LineBytes(0))))
+	}
+	return done
+}
+
+func (h *InfoHandler) DoRuneInsert(r rune) {
+	h.BufHandler.DoRuneInsert(r)
+	if h.EventCallback != nil {
+		h.EventCallback(strings.TrimSpace(string(h.LineBytes(0))))
+	}
+}
+
+// InfoNones is a list of actions that should have no effect when executed
+// by an infohandler
+var InfoNones = []string{
+	"Save",
+	"SaveAll",
+	"SaveAs",
+	"Find",
+	"FindNext",
+	"FindPrevious",
+	"Center",
+	"DuplicateLine",
+	"MoveLinesUp",
+	"MoveLinesDown",
+	"OpenFile",
+	"Start",
+	"End",
+	"PageUp",
+	"PageDown",
+	"SelectPageUp",
+	"SelectPageDown",
+	"HalfPageUp",
+	"HalfPageDown",
+	"ToggleHelp",
+	"ToggleKeyMenu",
+	"ToggleRuler",
+	"JumpLine",
+	"ClearStatus",
+	"ShellMode",
+	"CommandMode",
+	"AddTab",
+	"PreviousTab",
+	"NextTab",
+	"NextSplit",
+	"PreviousSplit",
+	"Unsplit",
+	"VSplit",
+	"HSplit",
+	"ToggleMacro",
+	"PlayMacro",
+	"Suspend",
+	"ScrollUp",
+	"ScrollDown",
+	"SpawnMultiCursor",
+	"SpawnMultiCursorSelect",
+	"RemoveMultiCursor",
+	"RemoveAllMultiCursors",
+	"SkipMultiCursor",
+}
+
+// InfoOverrides is the list of actions which have been overriden
+// by the infohandler
+var InfoOverrides = map[string]InfoKeyAction{
+	"CursorUp":      (*InfoHandler).CursorUp,
+	"CursorDown":    (*InfoHandler).CursorDown,
+	"InsertNewline": (*InfoHandler).InsertNewline,
+	"InsertTab":     (*InfoHandler).InsertTab,
+	"Escape":        (*InfoHandler).Escape,
+	"Quit":          (*InfoHandler).Quit,
+	"QuitAll":       (*InfoHandler).QuitAll,
+}
+
+func (h *InfoHandler) CursorUp() {
+	// TODO: history
+}
+func (h *InfoHandler) CursorDown() {
+	// TODO: history
+}
+func (h *InfoHandler) InsertTab() {
+	// TODO: autocomplete
+}
+func (h *InfoHandler) InsertNewline() {
+	h.DonePrompt(false)
+}
+func (h *InfoHandler) Quit() {
+	h.DonePrompt(true)
+}
+func (h *InfoHandler) QuitAll() {
+	h.DonePrompt(true)
+}
+func (h *InfoHandler) Escape() {
+	h.DonePrompt(true)
+}

cmd/micro/buffer/search.go

@@ -0,0 +1,93 @@
+package buffer
+
+import (
+	"regexp"
+	"unicode/utf8"
+
+	"github.com/zyedidia/micro/cmd/micro/util"
+)
+
+func (b *Buffer) findDown(r *regexp.Regexp, start, end Loc) ([2]Loc, bool) {
+	start.Y = util.Clamp(start.Y, 0, b.LinesNum()-1)
+
+	for i := start.Y; i <= end.Y; i++ {
+		l := b.LineBytes(i)
+		charpos := 0
+
+		if i == start.Y {
+			nchars := utf8.RuneCount(l)
+			start.X = util.Clamp(start.X, 0, nchars-1)
+			l = util.SliceEnd(l, start.X)
+			charpos = start.X
+		}
+
+		match := r.FindIndex(l)
+
+		if match != nil {
+			start := Loc{charpos + util.RunePos(l, match[0]), i}
+			end := Loc{charpos + util.RunePos(l, match[1]), i}
+			return [2]Loc{start, end}, true
+		}
+	}
+	return [2]Loc{}, false
+}
+
+func (b *Buffer) findUp(r *regexp.Regexp, start, end Loc) ([2]Loc, bool) {
+	start.Y = util.Clamp(start.Y, 0, b.LinesNum()-1)
+
+	for i := start.Y; i >= end.Y; i-- {
+		l := b.LineBytes(i)
+
+		if i == start.Y {
+			nchars := utf8.RuneCount(l)
+			start.X = util.Clamp(start.X, 0, nchars-1)
+			l = util.SliceStart(l, start.X)
+		}
+
+		match := r.FindIndex(l)
+
+		if match != nil {
+			start := Loc{util.RunePos(l, match[0]), i}
+			end := Loc{util.RunePos(l, match[1]), i}
+			return [2]Loc{start, end}, true
+		}
+	}
+	return [2]Loc{}, false
+}
+
+// FindNext finds the next occurrence of a given string in the buffer
+// It returns the start and end location of the match (if found) and
+// a boolean indicating if it was found
+// May also return an error if the search regex is invalid
+func (b *Buffer) FindNext(s string, from Loc, down bool) ([2]Loc, bool, error) {
+	if s == "" {
+		return [2]Loc{}, false, nil
+	}
+
+	var r *regexp.Regexp
+	var err error
+	if b.Settings["ignorecase"].(bool) {
+		r, err = regexp.Compile("(?i)" + s)
+	} else {
+		r, err = regexp.Compile(s)
+	}
+
+	if err != nil {
+		return [2]Loc{}, false, err
+	}
+
+	found := false
+	var l [2]Loc
+	if down {
+		l, found = b.findDown(r, from, b.End())
+		if !found {
+			l, found = b.findDown(r, b.Start(), from)
+		}
+	} else {
+		l, found = b.findUp(r, from, b.Start())
+		if !found {
+			l, found = b.findUp(r, b.End(), from)
+		}
+	}
+	return l, found, nil
+}

cmd/micro/display/window.go

@@ -317,7 +317,7 @@ func (w *BufWindow) getStyle(style tcell.Style, bloc buffer.Loc, r rune) (tcell.
 }
 
 func (w *BufWindow) showCursor(x, y int, main bool) {
-	if !main {
+	if main {
 		screen.Screen.ShowCursor(x, y)
 	} else {
 		r, _, _, _ := screen.Screen.GetContent(x, y)
@@ -421,8 +421,8 @@ func (w *BufWindow) displayBuffer() {
 
 				if showcursor {
 					for _, c := range cursors {
-						if c.X == bloc.X && c.Y == bloc.Y {
-							w.showCursor(w.X+vloc.X, w.Y+vloc.Y, true)
+						if c.X == bloc.X && c.Y == bloc.Y && !c.HasSelection() {
+							w.showCursor(w.X+vloc.X, w.Y+vloc.Y, c.Num == 0)
 						}
 					}
 				}
@@ -495,8 +495,8 @@ func (w *BufWindow) displayBuffer() {
 		}
 
 		for _, c := range cursors {
-			if c.X == bloc.X && c.Y == bloc.Y {
-				w.showCursor(w.X+vloc.X, w.Y+vloc.Y, true)
+			if c.X == bloc.X && c.Y == bloc.Y && !c.HasSelection() {
+				w.showCursor(w.X+vloc.X, w.Y+vloc.Y, c.Num == 0)
 			}
 		}
 

cmd/micro/info/infobuffer.go

@@ -27,8 +27,10 @@ type InfoBuf struct {
 	GutterMessage bool
 
 	PromptCallback func(resp string, canceled bool)
+	EventCallback  func(resp string)
 }
 
+// NewBuffer returns a new infobuffer
 func NewBuffer() *InfoBuf {
 	ib := new(InfoBuf)
 	ib.History = make(map[string][]string)
@@ -62,7 +64,11 @@ func (i *InfoBuf) Error(msg ...interface{}) {
 	// TODO: add to log?
 }
 
-func (i *InfoBuf) Prompt(prompt string, msg string, callback func(string, bool)) {
+// Prompt starts a prompt for the user, it takes a prompt, a possibly partially filled in msg
+// and callbacks executed when the user executes an event and when the user finishes the prompt
+// The eventcb passes the current user response as the argument and donecb passes the user's message
+// and a boolean indicating if the prompt was canceled
+func (i *InfoBuf) Prompt(prompt string, msg string, eventcb func(string), donecb func(string, bool)) {
 	// If we get another prompt mid-prompt we cancel the one getting overwritten
 	if i.HasPrompt {
 		i.DonePrompt(true)
@@ -71,21 +77,27 @@ func (i *InfoBuf) Prompt(prompt string, msg string, callback func(string, bool))
 	i.Msg = prompt
 	i.HasPrompt = true
 	i.HasMessage, i.HasError = false, false
-	i.PromptCallback = callback
+	i.PromptCallback = donecb
+	i.EventCallback = eventcb
 	i.Buffer.Insert(i.Buffer.Start(), msg)
 }
 
+// DonePrompt finishes the current prompt and indicates whether or not it was canceled
 func (i *InfoBuf) DonePrompt(canceled bool) {
 	i.HasPrompt = false
-	if canceled {
-		i.PromptCallback("", true)
-	} else {
-		i.PromptCallback(strings.TrimSpace(string(i.LineBytes(0))), false)
+	if i.PromptCallback != nil {
+		if canceled {
+			i.PromptCallback("", true)
+		} else {
+			i.PromptCallback(strings.TrimSpace(string(i.LineBytes(0))), false)
+		}
 	}
+	i.PromptCallback = nil
+	i.EventCallback = nil
 	i.Replace(i.Start(), i.End(), "")
 }
 
-// Reset resets the messenger's cursor, message and response
+// Reset resets the infobuffer's msg and info
 func (i *InfoBuf) Reset() {
 	i.Msg = ""
 	i.HasPrompt, i.HasMessage, i.HasError = false, false, false

cmd/micro/util/util.go

@@ -188,6 +188,12 @@ func IsStrWhitespace(str string) bool {
 	return true
 }
 
+// RunePos returns the rune index of a given byte index
+// Make sure the byte index is not between code points
+func RunePos(b []byte, i int) int {
+	return utf8.RuneCount(b[:i])
+}
+
 // TODO: consider changing because of snap segfault
 // ReplaceHome takes a path as input and replaces ~ at the start of the path with the user's
 // home directory. Does nothing if the path does not start with '~'.
@@ -302,3 +308,12 @@ func GetCharPosInLine(b []byte, visualPos int, tabsize int) int {
 
 	return i
 }
+
+func Clamp(val, min, max int) int {
+	if val < min {
+		val = min
+	} else if val > max {
+		val = max
+	}
+	return val
+}