[kitty] Try to decode kitty escape sequences

src/document/html/parser/link.c

@@ -320,8 +320,8 @@ html_img_kitty(struct html_context *html_context, char *a,
 	}
 	int xw = (im->width + document->options.cell_width - 1) / document->options.cell_width;
 	int y;
-	im->id = html_top->name - document->text.source;
+	im->number = html_top->name - document->text.source;
-	im->number = im_number;
+	im->ID = im_number;
 
 	for (y = 0; y < how_many; y++) {
 		int x;

src/terminal/Makefile

@@ -1,7 +1,7 @@
 top_builddir=../..
 include $(top_builddir)/Makefile.config
 
-OBJS-$(CONFIG_KITTY) += kitty.o
+OBJS-$(CONFIG_KITTY) += kitty.o map.obj
 OBJS-$(CONFIG_MOUSE) += mouse.o
 OBJS-$(CONFIG_LIBSIXEL) += sixel.o
 OBJS-$(CONFIG_TERMINFO) += terminfo.o

src/terminal/kbd.c

@@ -38,6 +38,9 @@
 #include "terminal/hardio.h"
 #include "terminal/itrm.h"
 #include "terminal/kbd.h"
+#ifdef CONFIG_KITTY
+#include "terminal/map.h"
+#endif
 #include "terminal/mouse.h"
 #include "terminal/terminal.h"
 #include "util/error.h"
@@ -785,6 +788,74 @@ get_ui_double_esc(void)
 	return ui_double_esc;
 }
 
+#ifdef CONFIG_KITTY
+static int
+decode_kitty_escape_sequence(struct itrm *itrm)
+{
+	ELOG
+	int i = 3;
+	int was_esc = 0;
+
+	if (itrm->in.queue.len < 3) {
+		return -1;
+	}
+
+	if (itrm->in.queue.data[2] != 'G') {
+		return -1;
+	}
+
+	for (i = 3; i < itrm->in.queue.len; i++) {
+		if (itrm->in.queue.data[i] == ASCII_ESC) {
+			was_esc = i + 1;
+			break;
+		}
+	}
+	if (!was_esc) {
+		return -1;
+	}
+
+	if (was_esc >= itrm->in.queue.len || itrm->in.queue.data[was_esc] != '\\') {
+		return -1;
+	}
+	itrm->in.queue.data[was_esc] = '\0';
+	const char *data = (const char *)(itrm->in.queue.data + 3);
+	char *ok = strstr(data, "OK");
+	int id = -1;
+	int ID = -1;
+
+	if (ok) {
+		char *ieq = strstr(data, "i=");
+
+		if (ieq) {
+			id = atoi(ieq + 2);
+		}
+		char *Ieq = strstr(data, "I=");
+		if (Ieq) {
+			ID = atoi(Ieq + 2);
+		}
+		if (id >= 0 && ID >= 0) {
+			set_id_ID(id, ID);
+		}
+	} else {
+		char *enoent = strstr(data, "ENOENT");
+
+		if (enoent) {
+			char *ieq = strstr(data, "i=");
+
+			if (ieq) {
+				id = atoi(ieq + 2);
+			}
+			if (id >= 0) {
+				remove_id(id);
+			}
+		}
+	}
+	itrm->in.queue.data[was_esc] = '\\';
+
+	return was_esc + 1;
+}
+#endif
+
 /** Decode a control sequence that begins with CSI (CONTROL SEQUENCE
  * INTRODUCER) encoded as ESC [, and set @a *ev accordingly.
  * (ECMA-48 also allows 0x9B as a single-byte CSI, but we don't
@@ -1163,6 +1234,10 @@ process_queue(struct itrm *itrm)
 			el = decode_terminal_escape_sequence(itrm, &ev);
 		} else if (itrm->in.queue.data[1] == 0x4F /* SS3 */) {
 			el = decode_terminal_application_key(itrm, &ev);
+#ifdef CONFIG_KITTY
+		} else if (itrm->in.queue.data[1] == '_') {
+			el = decode_kitty_escape_sequence(itrm);
+#endif
 		} else if (itrm->in.queue.data[1] == ASCII_ESC) {
 			/* ESC ESC can be either Alt-Esc or the
 			 * beginning of e.g. ESC ESC 0x5B 0x41,

src/terminal/kitty.c

@@ -16,6 +16,7 @@
 #include "osdep/osdep.h"
 #include "terminal/hardio.h"
 #include "terminal/kitty.h"
+#include "terminal/map.h"
 #include "terminal/screen.h"
 #include "terminal/terminal.h"
 #include "util/base64.h"
@@ -91,7 +92,7 @@ try_to_draw_k_images(struct terminal *term)
 {
 	ELOG
 
-	if (!term->kitty || !term->number_of_images) {
+	if (!term->kitty) {
 		return;
 	}
 	struct string text;
@@ -118,13 +119,15 @@ try_to_draw_k_images(struct terminal *term)
 		}
 		add_cursor_move_to_string(&text, im->cy + 1, im->cx + 1);
 
-		if (!im->sent) {
+		int id = get_id_from_ID(im->ID);
+
+		if (id < 0) {
 			int m;
 			int left = im->pixels.length;
 			int sent = 0;
 			while (1) {
 				m = left >= 4000;
-				add_format_to_string(&text, "\033_Gf=32,i=%d,s=%d,v=%d,m=%d,t=d,q=1;", im->number, im->width, im->height, m);
+				add_format_to_string(&text, "\033_Gf=32,I=%d,s=%d,v=%d,m=%d,t=d,a=T;", im->ID, im->width, im->height, m);
 				add_bytes_to_string(&text, im->pixels.source + sent, m ? 4000 : left);
 				add_to_string(&text, "\033\\");
 				if (!m) {
@@ -133,9 +136,9 @@ try_to_draw_k_images(struct terminal *term)
 				sent += 4000;
 				left -= 4000;
 			};
-			im->sent = 1;
+		} else {
+			add_format_to_string(&text, "\033_Gi=%d,x=%d,y=%d,w=%d,h=%d,a=p,q=1\033\\", id, im->x, im->y, im->w, im->h);
 		}
-		add_format_to_string(&text, "\033_Gi=%d,x=%d,y=%d,w=%d,h=%d,a=p,q=1\033\\", im->number, im->x, im->y, im->w, im->h);
 
 		if (text.length) {
 			if (term->master) want_draw();
@@ -194,7 +197,7 @@ copy_k_frame(struct k_image *src, struct el_box *box, int cell_width, int cell_h
 	dest->width = src->width;
 	dest->height = src->height;
 
-	dest->id = src->id;
+	dest->ID = src->ID;
 	dest->number = src->number;
 	dest->sent = src->sent;
 

src/terminal/kitty.h

@@ -21,6 +21,7 @@ struct k_image {
 	int width;
 	int height;
 	int id;
+	int ID;
 	int number;
 	int x;
 	int y;

src/terminal/map.cpp

@@ -0,0 +1,46 @@
+#include "terminal/map.h"
+#include <map>
+
+#include <stdio.h>
+
+static std::map<unsigned int, unsigned int> map_ID;
+static std::map<unsigned int, unsigned int> reverse_map_ID;
+
+// -1 not found
+int
+get_id_from_ID(unsigned int ID)
+{
+	auto search = map_ID.find(ID);
+
+	if (search == map_ID.end()) {
+		return -1;
+	}
+
+	return search->second;
+
+}
+
+void
+set_id_ID(unsigned int id, unsigned int ID)
+{
+	map_ID[ID] = id;
+	reverse_map_ID[id] = ID;
+}
+
+void
+remove_id(unsigned int id)
+{
+	auto search = reverse_map_ID.find(id);
+
+	if (search == reverse_map_ID.end()) {
+		return;
+	}
+	unsigned int ID = search->second;
+	reverse_map_ID.erase(search);
+
+	auto search2 = map_ID.find(ID);
+
+	if (search2 != map_ID.end()) {
+		map_ID.erase(search2);
+	}
+}

src/terminal/map.h

@@ -0,0 +1,16 @@
+#ifndef EL__TERMINAL_MAP_H
+#define EL__TERMINAL_MAP_H
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+int get_id_from_ID(unsigned int ID);
+void set_id_ID(unsigned int id, unsigned int ID);
+void remove_id(unsigned int id);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* EL__TERMINAL_MAP_H */

src/terminal/meson.build

@@ -1,5 +1,5 @@
 if conf_data.get('CONFIG_KITTY')
-	srcs += files('kitty.c')
+	srcs += files('kitty.c', 'map.cpp')
 endif
 if conf_data.get('CONFIG_MOUSE')
 	srcs += files('mouse.c')

src/viewer/text/draw.c

@@ -480,7 +480,7 @@ draw_doc(struct session *ses, struct document_view *doc_view, int active)
 
 			if (!found) {
 				for (;cx < data[im.cy].length; cx++) {
-					if (im.id == data[im.cy].ch.chars[cx].number) {
+					if (im.number == data[im.cy].ch.chars[cx].number) {
 						found = 1;
 						break;
 					}