Add editor packages

2026-10-26 02:32:03 +00:00
parent 38714f6c80
commit 4ed2ee97e0
23 changed files with 2114 additions and 0 deletions
@@ -0,0 +1,116 @@
+package editor
+
+import (
+	"errors"
+	"fmt"
+	"log/slog"
+	"os"
+	"path/filepath"
+
+	"code.chimeric.al/dwrz/wen/internal/editor/buffer"
+	"code.chimeric.al/dwrz/wen/internal/editor/event"
+)
+
+// load files into editor buffers.
+func (e *Editor) load(files []string) {
+	// Attempt to deduplicate any files.
+	var (
+		unique = map[string]struct{}{}
+		paths  []string
+	)
+	for _, f := range files {
+		path, err := filepath.Abs(f)
+		if err != nil {
+			e.log.Error(
+				"failed to get absolute path",
+				slog.String("file", f),
+				slog.Any("error", err),
+			)
+
+			path = filepath.Clean(f)
+		}
+
+		if _, exists := unique[path]; !exists {
+			unique[path] = struct{}{}
+			paths = append(paths, path)
+		}
+	}
+
+	// Load the files.
+	// Set the first successfully loaded file as the active buffer.
+	var setActive bool
+	for _, name := range paths {
+		p := buffer.NewBufferParams{
+			Name: name,
+			Log:  e.log,
+		}
+
+		b, err := buffer.Open(p)
+		// Create the file if it doesn't exist.
+		if errors.Is(err, os.ErrNotExist) {
+			b, err = buffer.Create(p)
+		}
+		// If there was an error, report it to the user.
+		if err != nil {
+			e.prompt.SetText(fmt.Sprintf(
+				"failed to load buffer %s: %v",
+				name, err,
+			))
+			continue
+		}
+
+		e.log.Debug("loaded buffer", slog.String("name", name))
+
+		e.setBuffer(b)
+
+		if !setActive {
+			e.setActiveBuffer(name)
+			setActive = true
+		}
+	}
+
+	if e.prompt.Text() == "" {
+		e.prompt.SetText("loaded buffers")
+	}
+}
+
+func (e *Editor) renameBuffer(b *buffer.Buffer, name string) error {
+	e.mu.Lock()
+	defer e.mu.Unlock()
+
+	oldName := b.Name()
+	if err := b.SaveAs(name); err != nil {
+		return fmt.Errorf("failed to save as %s: %v", name, err)
+	}
+
+	delete(e.buffers, oldName)
+	e.buffers[name] = b
+
+	return nil
+}
+
+// setActiveBuffer sets the named buffer as the active buffer.
+func (e *Editor) setActiveBuffer(name string) {
+	e.mu.Lock()
+	b, exists := e.buffers[name]
+	if !exists {
+		e.mu.Unlock()
+		e.events <- event.NewError(fmt.Errorf(
+			"failed to set active buffer: %s does not exist", name,
+		))
+		return
+	}
+
+	e.active = b
+	e.mu.Unlock()
+
+	e.log.Debug("set active buffer", slog.String("name", b.Name()))
+}
+
+// setBuffer stores a buffer in the editor's buffer map.
+func (e *Editor) setBuffer(b *buffer.Buffer) {
+	e.mu.Lock()
+	defer e.mu.Unlock()
+
+	e.buffers[b.Name()] = b
+}