Start work on displaying font sampler images

kittens/choose_fonts/graphics.go

@@ -0,0 +1,71 @@
+package choose_fonts
+
+import (
+	"fmt"
+	"strings"
+
+	"kitty/tools/tui/graphics"
+	"kitty/tools/tui/loop"
+)
+
+var _ = fmt.Print
+
+type image struct {
+	id, image_number uint32
+	current_file     string
+}
+
+type graphics_manager struct {
+	main, bold, italic, bi, extra image
+	images                        [5]*image
+}
+
+func (g *graphics_manager) initialize(lp *loop.Loop) {
+	g.images = [5]*image{&g.main, &g.bold, &g.italic, &g.bi, &g.extra}
+	payload := []byte("123")
+	buf := strings.Builder{}
+	gc := &graphics.GraphicsCommand{}
+	gc.SetImageNumber(7891230).SetTransmission(graphics.GRT_transmission_direct).SetDataWidth(1).SetDataHeight(1).SetFormat(
+		graphics.GRT_format_rgb).SetDataSize(uint64(len(payload)))
+	d := func() uint32 {
+		im := gc.ImageNumber()
+		im++
+		gc.SetImageNumber(im)
+		_ = gc.WriteWithPayloadTo(&buf, payload)
+		return im
+
+	}
+	for _, img := range g.images {
+		img.image_number = d()
+	}
+	lp.QueueWriteString(buf.String())
+}
+
+func (g *graphics_manager) on_response(gc *graphics.GraphicsCommand) (err error) {
+	if gc.ResponseMessage() != "OK" {
+		return fmt.Errorf("Failed to load image with error: %s", gc.ResponseMessage())
+	}
+	for _, img := range g.images {
+		if img.image_number == gc.ImageNumber() {
+			img.id = gc.ImageId()
+			break
+		}
+	}
+	return
+}
+
+func (g *graphics_manager) finalize(lp *loop.Loop) {
+	buf := strings.Builder{}
+	gc := &graphics.GraphicsCommand{}
+	gc.SetAction(graphics.GRT_action_delete).SetDelete(graphics.GRT_free_by_number)
+	d := func(n uint32) {
+		gc.SetImageNumber(n)
+		gc.WriteWithPayloadTo(&buf, nil)
+	}
+	d(g.main.image_number)
+	d(g.bold.image_number)
+	d(g.italic.image_number)
+	d(g.bi.image_number)
+	d(g.extra.image_number)
+	lp.QueueWriteString(buf.String())
+}

kittens/choose_fonts/main.go

@@ -38,6 +38,7 @@ func main() (rc int, err error) {
 		return "", nil
 	}
 	lp.OnWakeup = h.on_wakeup
+	lp.OnEscapeCode = h.on_escape_code
 	lp.OnFinalize = func() string {
 		h.finalize()
 		lp.SetCursorVisible(true)

kittens/choose_fonts/ui.go

@@ -7,6 +7,7 @@ import (
 	"sync"
 
 	"kitty/tools/tui"
+	"kitty/tools/tui/graphics"
 	"kitty/tools/tui/loop"
 	"kitty/tools/tui/readline"
 	"kitty/tools/utils"
@@ -42,6 +43,7 @@ type handler struct {
 	render_count         uint
 	render_lines         tui.RenderLines
 	text_style           TextStyle
+	graphics_manager     graphics_manager
 
 	// Listing
 	rl                          *readline.Readline
@@ -275,6 +277,7 @@ func (h *handler) initialize() {
 	h.variable_data_requested_for = utils.NewSet[string](256)
 	h.draw_screen()
 	initialize_variable_data_cache()
+	h.graphics_manager.initialize(h.lp)
 	go func() {
 		h.set_worker_error(kitty_font_backend.query("list_monospaced_fonts", nil, &h.fonts))
 		h.lp.WakeupMainThread()
@@ -284,6 +287,7 @@ func (h *handler) initialize() {
 func (h *handler) finalize() {
 	h.lp.SetCursorVisible(true)
 	h.lp.SetCursorShape(loop.BLOCK_CURSOR, true)
+	h.graphics_manager.finalize(h.lp)
 }
 
 func (h *handler) on_query_response(key, val string, valid bool) error {
@@ -389,4 +393,15 @@ func (h *handler) on_text(text string, from_key_event bool, in_bracketed_paste b
 	return
 }
 
+func (h *handler) on_escape_code(etype loop.EscapeCodeType, payload []byte) error {
+	switch etype {
+	case loop.APC:
+		gc := graphics.GraphicsCommandFromAPC(payload)
+		if gc != nil {
+			return h.graphics_manager.on_response(gc)
+		}
+	}
+	return nil
+}
+
 // }}}