Add option to open slide in editor

internal/editor/editor.go

@@ -0,0 +1,72 @@
+package editor
+
+import (
+	"fmt"
+	"os"
+	"os/exec"
+	"strings"
+
+	tea "github.com/charmbracelet/bubbletea"
+	"github.com/muesli/coral"
+)
+
+var program = func() string {
+	if editor := os.Getenv("EDITOR"); editor != "" {
+		return editor
+	}
+	return "vim"
+}()
+
+// Opens the current slide as a split window in tmux.
+func OpenNewWindow(fileName string, slide string) tea.Cmd {
+	var c *exec.Cmd
+
+	editorName := GetEditorName(program)
+
+	switch editorName {
+	case "vim", "nvim":
+		c = exec.Command(program, fmt.Sprintf("+%d", GetLineNumber(fileName, slide)), fileName)
+	case "code":
+		c = exec.Command(program, fileName, "--go-to", fmt.Sprintf("+%d", GetLineNumber(fileName, slide)))
+	default:
+		c = exec.Command(program, fileName)
+	}
+
+	return tea.ExecProcess(c, nil)
+}
+
+func linesMatch(lines []string, sLines []string, start int) bool {
+	for j := range sLines {
+		if strings.TrimSpace(lines[start+j]) != strings.TrimSpace(sLines[j]) {
+			return false
+		}
+	}
+	return true
+}
+
+func GetLineNumber(fileName string, slide string) int {
+	b, err := os.ReadFile(fileName)
+	if err != nil {
+		return -1
+	}
+
+	lines := strings.Split(string(b), "\n")
+	sLines := strings.Split(slide, "\n")
+
+	for i := range lines {
+		if linesMatch(lines, sLines, i) {
+			return i
+		}
+	}
+
+	return -1
+}
+
+func GetEditorName(editorPath string) string {
+	parts := strings.Split(editorPath, "/")
+	return parts[len(parts)-1]
+}
+
+func InitEditorFlag(rootCmd *coral.Command) {
+	rootCmd.PersistentFlags().StringVarP(&program, "editor", "e", program, "Specify the editor to use")
+}

internal/model/model.go

@@ -11,6 +11,7 @@ import (
 	"time"
 
 	"github.com/atotto/clipboard"
+	"github.com/maaslalani/slides/internal/editor"
 	"github.com/maaslalani/slides/internal/file"
 	"github.com/maaslalani/slides/internal/navigation"
 	"github.com/maaslalani/slides/internal/process"
@@ -177,6 +178,9 @@ func (m Model) Update(msg tea.Msg) (tea.Model, tea.Cmd) {
 			return m, nil
 		case "ctrl+c", "q":
 			return m, tea.Quit
+		case "ctrl+o":
+			// Opens the current slide in an editor
+			return m, editor.OpenNewWindow(m.FileName, m.Slides[m.Page])
 		default:
 			newState := navigation.Navigate(navigation.State{
 				Buffer:      m.buffer,

main.go

@@ -7,6 +7,7 @@ import (
 
 	tea "github.com/charmbracelet/bubbletea"
 	"github.com/maaslalani/slides/internal/cmd"
+	"github.com/maaslalani/slides/internal/editor"
 	"github.com/maaslalani/slides/internal/model"
 	"github.com/maaslalani/slides/internal/navigation"
 	"github.com/muesli/coral"
@@ -47,6 +48,7 @@ func init() {
 	rootCmd.AddCommand(
 		cmd.ServeCmd,
 	)
+	editor.InitEditorFlag(rootCmd)
 	rootCmd.CompletionOptions.DisableDefaultCmd = true
 }