Fix the Save As and Open menu buttons in Edit Mode

The "Save As" and "Open" buttons still used an old implementation that
assumed you were talking about files only in the "./maps" folder instead
of loading them from the user's levels and doodads folders.

Now all of the menu buttons in Edit Mode intelligently open files the
same as the `edit <filename>` command from the dev console. You can omit
the file extension and it will attempt to load a Level before a Doodad
to find the first named file, or provide the full extension to be
specific.

pkg/editor_ui.go

@@ -317,6 +317,30 @@ func (u *EditorUI) ExpandCanvas(e render.Engine) {
 func (u *EditorUI) SetupMenuBar(d *Doodle) *ui.Frame {
 	frame := ui.NewFrame("MenuBar")
 
+	// Save and Save As common menu handler
+	var saveFunc func(filename string)
+
+	switch u.Scene.DrawingType {
+	case enum.LevelDrawing:
+		saveFunc = func(filename string) {
+			if err := u.Scene.SaveLevel(filename); err != nil {
+				d.Flash("Error: %s", err)
+			} else {
+				d.Flash("Saved level: %s", filename)
+			}
+		}
+	case enum.DoodadDrawing:
+		saveFunc = func(filename string) {
+			if err := u.Scene.SaveDoodad(filename); err != nil {
+				d.Flash("Error: %s", err)
+			} else {
+				d.Flash("Saved doodad: %s", filename)
+			}
+		}
+	default:
+		d.Flash("Error: Scene.DrawingType is not a valid type")
+	}
+
 	type menuButton struct {
 		Text  string
 		Click func(render.Point)
@@ -348,29 +372,6 @@ func (u *EditorUI) SetupMenuBar(d *Doodle) *ui.Frame {
 		menuButton{
 			Text: "Save",
 			Click: func(render.Point) {
-				var saveFunc func(filename string)
-
-				switch u.Scene.DrawingType {
-				case enum.LevelDrawing:
-					saveFunc = func(filename string) {
-						if err := u.Scene.SaveLevel(filename); err != nil {
-							d.Flash("Error: %s", err)
-						} else {
-							d.Flash("Saved level: %s", filename)
-						}
-					}
-				case enum.DoodadDrawing:
-					saveFunc = func(filename string) {
-						if err := u.Scene.SaveDoodad(filename); err != nil {
-							d.Flash("Error: %s", err)
-						} else {
-							d.Flash("Saved doodad: %s", filename)
-						}
-					}
-				default:
-					d.Flash("Error: Scene.DrawingType is not a valid type")
-				}
-
 				if u.Scene.filename != "" {
 					saveFunc(u.Scene.filename)
 				} else {
@@ -387,8 +388,7 @@ func (u *EditorUI) SetupMenuBar(d *Doodle) *ui.Frame {
 			Click: func(render.Point) {
 				d.Prompt("Save as filename>", func(answer string) {
 					if answer != "" {
-						u.Scene.SaveLevel("./maps/" + answer) // TODO: maps path
+						saveFunc(answer)
-						d.Flash("Saved: %s", answer)
 					}
 				})
 			},
@@ -398,7 +398,9 @@ func (u *EditorUI) SetupMenuBar(d *Doodle) *ui.Frame {
 			Click: func(render.Point) {
 				d.Prompt("Open filename>", func(answer string) {
 					if answer != "" {
-						u.d.EditDrawing("./maps/" + answer) // TODO: maps path
+						if err := d.EditFile(answer); err != nil {
+							d.Flash("File not found: %s", answer)
+						}
 					}
 				})
 			},