Added temporary command x-replace

This runs a search and replace over the entire model.  This is just
temporary at the moment in order to get something working.

Also added hitting backspace on an empty entrybox to cancel it.

commandmap.go

@@ -5,6 +5,8 @@ import (
 	"fmt"
 	"regexp"
 
+	"github.com/lmika/shellwords"
+
 	"github.com/lmika/ted/ui"
 )
 
@@ -60,20 +62,19 @@ func (cm *CommandMapping) KeyMapping(key rune) *Command {
 // Evaluate a command
 func (cm *CommandMapping) Eval(ctx *CommandContext, expr string) error {
 	// TODO: Use propper expression language here
-	cmd := cm.Commands[expr]
+	toks := shellwords.Split(expr)
+	if len(toks) == 0 {
+		return nil
+	}
+
+	cmd := cm.Commands[toks[0]]
 	if cmd != nil {
-		return cmd.Do(ctx)
+		return cmd.Do(ctx.WithArgs(toks[1:]))
 	}
 
 	return fmt.Errorf("no such command: %v", expr)
 }
 
-//func (cm *CommandMapping) DoEval(ctx *CommandContext, expr string) {
-//	if err := cm.Eval(ctx, expr); err != nil {
-//		ctx.ShowError(err)
-//	}
-//}
-
 // Registers the standard view navigation commands.  These commands require the frame
 func (cm *CommandMapping) RegisterViewCommands() {
 	cm.Define("move-down", "Moves the cursor down one row", "", gridNavOperation(func(grid *ui.Grid) { grid.MoveBy(0, 1) }))
@@ -153,6 +154,34 @@ func (cm *CommandMapping) RegisterViewCommands() {
 			}
 		}
 	})
+	cm.Define("x-replace", "Performs a search and replace", "", func(ctx *CommandContext) error {
+		if len(ctx.Args()) != 2 {
+			return errors.New("Usage: x-replace MATCH REPLACEMENT")
+		}
+
+		match := ctx.Args()[0]
+		repl := ctx.Args()[1]
+
+		re, err := regexp.Compile(match)
+		if err != nil {
+			return fmt.Errorf("invalid regexp: %v", err)
+		}
+
+		matchCount := 0
+		height, width := ctx.ModelVC().Model().Dimensions()
+		for r := 0; r < height; r++ {
+			for c := 0; c < width; c++ {
+				cell := ctx.ModelVC().Model().CellValue(r, c)
+				if re.FindStringIndex(cell) != nil {
+					ctx.ModelVC().SetCellValue(r, c, re.ReplaceAllString(cell, repl))
+					matchCount++
+				}
+			}
+		}
+
+		ctx.Frame().ShowMessage(fmt.Sprintf("Replaced %d matches", matchCount))
+		return nil
+	})
 
 	cm.Define("open-right", "Inserts a column to the right of the curser", "", func(ctx *CommandContext) error {
 		grid := ctx.Frame().Grid()

go.mod

@@ -3,6 +3,7 @@ module github.com/lmika/ted
 go 1.15
 
 require (
+	github.com/lmika/shellwords v0.0.0-20140714114018-ce258dd729fe
 	github.com/mattn/go-runewidth v0.0.9 // indirect
 	github.com/nsf/termbox-go v0.0.0-20200418040025-38ba6e5628f1
 )

go.sum

@@ -1,3 +1,5 @@
+github.com/lmika/shellwords v0.0.0-20140714114018-ce258dd729fe h1:1UXS/6OFkbi6JrihPykmYO1VtsABB02QQ+YmYYzTY18=
+github.com/lmika/shellwords v0.0.0-20140714114018-ce258dd729fe/go.mod h1:qpdOkLougV5Yry4Px9f1w1pNMavcr6Z67VW5Ro+vW5I=
 github.com/mattn/go-runewidth v0.0.9 h1:Lm995f3rfxdpd6TSmuVCHVb/QhupuXlYr8sCI/QdE+0=
 github.com/mattn/go-runewidth v0.0.9/go.mod h1:H031xJmbD/WCDINGzjvQ9THkh0rPKHF+m2gUSrubnMI=
 github.com/nsf/termbox-go v0.0.0-20200418040025-38ba6e5628f1 h1:lh3PyZvY+B9nFliSGTn5uFuqQQJGuNrD0MLCokv09ag=

session.go

@@ -1,8 +1,9 @@
 package main
 
 import (
-	"github.com/lmika/ted/ui"
 	"regexp"
+
+	"github.com/lmika/ted/ui"
 )
 
 // The session is responsible for managing the UI and the model and handling
@@ -61,7 +62,7 @@ func (session *Session) KeyPressed(key rune, mod int) {
 
 	cmd := session.Commands.KeyMapping(key)
 	if cmd != nil {
-		err := cmd.Do(&CommandContext{session})
+		err := cmd.Do(&CommandContext{session, nil})
 		if err != nil {
 			session.Frame.ShowMessage(err.Error())
 		}
@@ -71,6 +72,18 @@ func (session *Session) KeyPressed(key rune, mod int) {
 // The command context used by the session
 type CommandContext struct {
 	session *Session
+	args    []string
+}
+
+func (scc *CommandContext) WithArgs(args []string) *CommandContext {
+	return &CommandContext{
+		session: scc.session,
+		args:    args,
+	}
+}
+
+func (scc *CommandContext) Args() []string {
+	return scc.args
 }
 
 func (scc *CommandContext) ModelVC() *ModelViewCtrl {

ui/stdcomps.go

@@ -124,6 +124,8 @@ func (te *TextEntry) KeyPressed(key rune, mod int) {
 		if mod&ModKeyAlt != 0 {
 			te.backspaceWhile(unicode.IsSpace)
 			te.backspaceWhile(func(r rune) bool { return !unicode.IsSpace(r) })
+		} else if te.cursorOffset == 0 {
+			te.cancelAndExit()
 		} else {
 			te.backspace()
 		}
@@ -136,14 +138,18 @@ func (te *TextEntry) KeyPressed(key rune, mod int) {
 			te.OnEntry(te.value)
 		}
 	} else if key == KeyCtrlC {
-		if te.OnCancel != nil {
-			te.OnCancel()
-		}
+		te.cancelAndExit()
 	}
 
 	//panic(fmt.Sprintf("Entered key: '%x', mod: '%x'", key, mod))
 }
 
+func (te *TextEntry) cancelAndExit() {
+	if te.OnCancel != nil {
+		te.OnCancel()
+	}
+}
+
 // Backspace
 func (te *TextEntry) backspace() {
 	te.removeCharAtPos(te.cursorOffset - 1)