Added search and replaced split out edit and replace cell commands

commandmap.go

@@ -3,6 +3,7 @@ package main
 import (
 	"errors"
 	"fmt"
+	"regexp"
 
 	"github.com/lmika/ted/ui"
 )
@@ -67,11 +68,11 @@ func (cm *CommandMapping) Eval(ctx *CommandContext, expr string) error {
 	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)
-	}
-}
+//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() {
@@ -105,6 +106,64 @@ func (cm *CommandMapping) RegisterViewCommands() {
 		grid.MoveTo(dimX-1, cellY)
 	}))
 
+	cm.Define("delete-row", "Removes the currently selected row", "", func(ctx *CommandContext) error {
+		grid := ctx.Frame().Grid()
+		_, cellY := grid.CellPosition()
+
+		if rwModel, isRwModel := ctx.Session().Model.(RWModel); isRwModel {
+			DeleteRow(rwModel, cellY)
+			return nil
+		}
+
+		return errors.New("model is read-only")
+	})
+	cm.Define("delete-col", "Removes the currently selected column", "", func(ctx *CommandContext) error {
+		grid := ctx.Frame().Grid()
+		cellX, _ := grid.CellPosition()
+
+		if rwModel, isRwModel := ctx.Session().Model.(RWModel); isRwModel {
+			DeleteCol(rwModel, cellX)
+			return nil
+		}
+
+		return errors.New("model is read-only")
+	})
+	cm.Define("search", "Search for a cell", "", func(ctx *CommandContext) error {
+		ctx.Frame().Prompt(PromptOptions{ Prompt: "/" }, func(res string) error {
+			re, err := regexp.Compile(res)
+			if err != nil {
+				return fmt.Errorf("invalid regexp: %v", err)
+			}
+
+			ctx.session.LastSearch = re
+			return ctx.Session().Commands.Eval(ctx, "search-next")
+		})
+		return nil
+	})
+	cm.Define("search-next", "Goto the next cell", "", func(ctx *CommandContext) error {
+		if ctx.session.LastSearch == nil {
+			ctx.Session().Commands.Eval(ctx, "search")
+		}
+
+		height, width := ctx.session.Model.Dimensions()
+		startX, startY := ctx.Frame().Grid().CellPosition()
+		cellX, cellY := startX, startY
+
+		for {
+			cellX++
+			if cellX >= width {
+				cellX = 0
+				cellY = (cellY + 1) % height
+			}
+			if ctx.session.LastSearch.MatchString(ctx.session.Model.CellValue(cellY, cellX)) {
+				ctx.Frame().Grid().MoveTo(cellX, cellY)
+				return nil
+			} else if (cellX == startX) && (cellY == startY) {
+				return errors.New("No match found")
+			}
+		}
+	})
+
 	cm.Define("open-right", "Inserts a column to the right of the curser", "", func(ctx *CommandContext) error {
 		grid := ctx.Frame().Grid()
 		cellX, _ := grid.CellPosition()
@@ -149,18 +208,34 @@ func (cm *CommandMapping) RegisterViewCommands() {
 	})
 
 	cm.Define("enter-command", "Enter command", "", func(ctx *CommandContext) error {
-		ctx.Frame().Prompt(":", func(res string) {
-			cm.DoEval(ctx, res)
+		ctx.Frame().Prompt(PromptOptions{ Prompt: ":" }, func(res string) error {
+			return cm.Eval(ctx, res)
 		})
 		return nil
 	})
 
-	cm.Define("set-cell", "Change the value of the selected cell", "", func(ctx *CommandContext) error {
+	cm.Define("replace-cell", "Replace the value of the selected cell", "", func(ctx *CommandContext) error {
 		grid := ctx.Frame().Grid()
 		cellX, cellY := grid.CellPosition()
 		if rwModel, isRwModel := ctx.Session().Model.(RWModel); isRwModel {
-			ctx.Frame().Prompt("> ", func(res string) {
+			ctx.Frame().Prompt(PromptOptions{ Prompt: "> " }, func(res string) error {
 				rwModel.SetCellValue(cellY, cellX, res)
+				return nil
+			})
+		}
+		return nil
+	})
+	cm.Define("edit-cell", "Modify the value of the selected cell", "", func(ctx *CommandContext) error {
+		grid := ctx.Frame().Grid()
+		cellX, cellY := grid.CellPosition()
+
+		if rwModel, isRwModel := ctx.Session().Model.(RWModel); isRwModel {
+			ctx.Frame().Prompt(PromptOptions{
+				Prompt: "> ",
+				InitialValue: grid.Model().CellValue(cellY, cellX),
+			}, func(res string) error {
+				rwModel.SetCellValue(cellY, cellX, res)
+				return nil
 			})
 		}
 		return nil
@@ -219,10 +294,16 @@ func (cm *CommandMapping) RegisterViewKeyBindings() {
 	cm.MapKey(ui.KeyArrowLeft, cm.Command("move-left"))
 	cm.MapKey(ui.KeyArrowRight, cm.Command("move-right"))
 
-	cm.MapKey('e', cm.Command("set-cell"))
+	cm.MapKey('e', cm.Command("edit-cell"))
+	cm.MapKey('r', cm.Command("replace-cell"))
 
 	cm.MapKey('a', cm.Command("append"))
 
+	cm.MapKey('D', cm.Command("delete-row"))
+
+	cm.MapKey('/', cm.Command("search"))
+	cm.MapKey('n', cm.Command("search-next"))
+
 	cm.MapKey(':', cm.Command("enter-command"))
 }
 

frame.go

@@ -99,15 +99,28 @@ func (frame *Frame) Message(s string) {
 	frame.messageView.Text = s
 }
 
+func (frame *Frame) Error(err error) {
+	if err != nil {
+		frame.messageView.Text = err.Error()
+	}
+}
+
+type PromptOptions struct {
+	Prompt       string
+	InitialValue string
+}
+
 // Prompt the user for input.  This switches the mode to entry mode.
-func (frame *Frame) Prompt(prompt string, callback func(res string)) {
-	frame.textEntry.Prompt = prompt
-	frame.textEntry.SetValue("")
+func (frame *Frame) Prompt(options PromptOptions, callback func(res string) error) {
+	frame.textEntry.Prompt = options.Prompt
+	frame.textEntry.SetValue(options.InitialValue)
 
 	frame.textEntry.OnCancel = frame.exitEntryMode
 	frame.textEntry.OnEntry = func(res string) {
 		frame.exitEntryMode()
-		callback(res)
+		if err := callback(res); err != nil {
+			frame.Error(err)
+		}
 	}
 
 	frame.setMode(EntryMode)

model.go

@@ -6,23 +6,46 @@ package main
 // An abstract model interface.  At a minimum, models must be read only.
 type Model interface {
 
-    // The dimensions of the model (height, width).
-    Dimensions()     (int, int)
+	// The dimensions of the model (height, width).
+	Dimensions() (int, int)
 
-    // Returns the value of a cell
-    CellValue(r, c int) string
+	// Returns the value of a cell
+	CellValue(r, c int) string
 }
 
 // A read/write model.
 type RWModel interface {
-    Model
+	Model
 
-    // Resize the model.
-    Resize(newRow, newCol int)
+	// Resize the model.
+	Resize(newRow, newCol int)
 
-    // Sets the cell value
-    SetCellValue(r, c int, value string)
+	// Sets the cell value
+	SetCellValue(r, c int, value string)
 
-    // Returns true if the model has been modified in some way
-    IsDirty() bool
+	// Returns true if the model has been modified in some way
+	IsDirty() bool
+}
+
+// Deletes a row of a model
+func DeleteRow(model RWModel, row int) {
+	h, w := model.Dimensions()
+	for r := row; r < h-1; r++ {
+		for c := 0; c < w; c++ {
+			model.SetCellValue(r, c, model.CellValue(r+1, c))
+		}
+	}
+
+	model.Resize(h-1, w)
+}
+
+// Deletes a column of a model
+func DeleteCol(model RWModel, col int) {
+	h, w := model.Dimensions()
+	for c := col; c < w-1; c++ {
+		for r := 0; r < h; r++ {
+			model.SetCellValue(r, c, model.CellValue(r, c+1))
+		}
+	}
+	model.Resize(h, w-1)
 }

session.go

@@ -1,6 +1,9 @@
 package main
 
-import "github.com/lmika/ted/ui"
+import (
+	"github.com/lmika/ted/ui"
+	"regexp"
+)
 
 // The session is responsible for managing the UI and the model and handling
 // the interaction between the two and the user.
@@ -10,6 +13,8 @@ type Session struct {
 	Frame     *Frame
 	Commands  *CommandMapping
 	UIManager *ui.Ui
+
+	LastSearch	*regexp.Regexp
 }
 
 func NewSession(uiManager *ui.Ui, frame *Frame, source ModelSource) *Session {
@@ -73,10 +78,8 @@ func (scc *CommandContext) Frame() *Frame {
 }
 
 // Error displays an error if err is not nil
-func (scc *CommandContext) ShowError(err error) {
-	if err != nil {
-		scc.Frame().Message(err.Error())
-	}
+func (scc *CommandContext) Error(err error) {
+	scc.Frame().Error(err)
 }
 
 // Session grid model