Start work on drag source implementation

kittens/dnd/drag.go

@@ -0,0 +1,11 @@
+package dnd
+
+import (
+	"fmt"
+)
+
+var _ = fmt.Print
+
+type drag_status struct {
+	active bool
+}

kittens/dnd/drop.go

@@ -607,7 +607,7 @@ func (dnd *dnd) on_drop_move(cell_x, cell_y int, has_more bool, offered_mimes st
 		}
 	}
 	dnd.drop_status.in_window = cell_x > -1 && cell_y > -1
-	if !dnd.drop_status.in_window || dnd.drag_started { // disallow self drag and drop
+	if !dnd.drop_status.in_window || dnd.drag_status.active { // disallow self drag and drop
 		dnd.reset_drop()
 	}
 	mimes_changed := !slices.Equal(prev_status.accepted_mimes, dnd.drop_status.accepted_mimes)
@@ -622,7 +622,7 @@ func (dnd *dnd) on_drop_move(cell_x, cell_y int, has_more bool, offered_mimes st
 	needs_rerender = needs_rerender || dnd.drop_status.in_window != prev_status.in_window
 	if is_drop {
 		needs_rerender = true
-		if dnd.drop_status.action == 0 || len(dnd.drop_status.accepted_mimes) == 0 || dnd.drag_started {
+		if dnd.drop_status.action == 0 || len(dnd.drop_status.accepted_mimes) == 0 || dnd.drag_status.active {
 			dnd.end_drop(false)
 			return
 		}

kittens/dnd/main.go

@@ -86,7 +86,7 @@ type dnd struct {
 	tdir_counter                           int
 	is_case_sensitive_filesystem           bool
 	data_has_been_dropped                  bool
-	drag_started                           bool
+	drag_status                            drag_status
 	in_test_mode                           bool
 	copy_button_region, move_button_region button_region
 	confirm_drop                           struct {
@@ -183,19 +183,6 @@ func (dnd *dnd) run_loop() (err error) {
 	}
 
 	dnd.lp.OnDnDData = func(cmd loop.DndCommand) error {
-		// TODO: Use lp.QueueDnDData to implement drag and drop protocol
-		// If allow_drags, start a drag when the terminal sends the t=o
-		// event. Presend data for any drag_source objects that have non nil
-		// data fields and whose data size is <= 1MB. Set drag_started to true.
-		// reset drag_started at the end of the drag. Use opts.DragAction to
-		// set what actions are allowed.
-
-		// When acting as a drag source, dont forget to implement support for
-		// remote dragging, which means providing data for the text/uri-list
-		// mime type file:// entries when the terminal requests it using the
-		// dnd protocol. If the action chosen is move, delete the files
-		// corresponding to the drag sources, including the files in the
-		// uri-list and exit.
 		switch cmd.Type {
 		case 'T':
 			switch string(cmd.Payload) {

kittens/dnd/render.go

@@ -48,7 +48,7 @@ func (dnd *dnd) render_screen() error {
 	}
 	lp.ClearScreen()
 	dnd.copy_button_region, dnd.move_button_region = button_region{}, button_region{}
-	if dnd.drag_started {
+	if dnd.drag_status.active {
 		lp.Println("Dragging data...")
 		return nil
 	}