From 78b674610c03384c02096685486ed83b1416a3b9 Mon Sep 17 00:00:00 2001
From: nick black <dankamongmen@gmail.com>
Date: Sun, 13 Jun 2021 14:34:13 -0400
Subject: [PATCH] kill old xtsmgraphics / da lexing

---
 src/lib/termdesc.c | 192 ---------------------------------------------
 1 file changed, 192 deletions(-)

diff --git a/src/lib/termdesc.c b/src/lib/termdesc.c
index cef2b518e..9b64dcecd 100644
--- a/src/lib/termdesc.c
+++ b/src/lib/termdesc.c
@@ -433,195 +433,3 @@ err:
   free(ti->esctable);
   return -1;
 }
-
-/*
-// FIXME need unit tests on this
-// FIXME can read a character not intended for it
-// we'll get a trailing Device Attributes response, because we write
-// XTSMGRAPHICS followed by a DA query, in case the former isn't supported
-// (we'd otherwise hang looking for input).
-static int
-read_xtsmgraphics_reply(int fd, int* val2){
-  char in;
-  // return is of the form CSI ? Pi ; Ps ; Pv S
-  // Pi: 1 color registers, 2 sixel, 3 regis
-  // Pa: 1 read, 2 reset, 3 set to Pv, 4 read maximum
-  // Pv: n for color registers, width;height for geometry
-  // Ps: 0 success, 1 bad Pi, 2 bad Pa, 3 failure
-  enum {
-    WANT_CSI,
-    WANT_QMARK,
-    WANT_PI,
-    WANT_SEMI1,
-    WANT_SEMI2,
-    WANT_PV1,
-    WANT_PV2,
-    DONE,
-  } state = WANT_CSI;
-  int pv = 0;
-  int pi = 0;
-  while(read(fd, &in, 1) == 1){
-//fprintf(stderr, "READ: %c 0x%02x\n", in, in);
-    if(in == 'c'){ // should match the end of DA
-      break;
-    }
-    switch(state){
-      case WANT_CSI:
-        if(in == NCKEY_ESC){
-          state = WANT_QMARK;
-        }
-        break;
-      case WANT_QMARK:
-        if(in == '?'){
-          state = WANT_PI;
-        }
-        break;
-      case WANT_PI:
-        if(!isdigit(in)){
-          break;
-        }
-        pi *= 10;
-        pi += in - '0';
-        if(pi >= 1 && pi <= 3){
-          state = WANT_SEMI1;
-        }
-        break;
-      case WANT_SEMI1:
-        if(in == ';'){
-          state = WANT_SEMI2;
-        }
-        break;
-      case WANT_SEMI2:
-        if(in == ';'){
-          state = WANT_PV1;
-        }
-        break;
-      case WANT_PV1:
-        if(in == 'S'){
-          state = DONE;
-        }else if(val2 && in == ';'){
-          *val2 = 0;
-          state = WANT_PV2;
-        }else if(isdigit(in)){
-          pv *= 10;
-          pv += in - '0';
-        }
-        break;
-      case WANT_PV2:
-        if(in == 'S'){
-          state = DONE;
-        }else if(isdigit(in)){
-          *val2 *= 10;
-          *val2 += in - '0';
-        }
-        break;
-      case DONE:
-      default:
-        break;
-    }
-  }
-  if(state == DONE){
-    if(pv >= 0 && (!val2 || *val2 >= 0)){
-      return pv;
-    }
-  }
-  return -1;
-}
-
-static int
-query_xtsmgraphics(int fd, const char* seq, int* val, int* val2){
-  if(blocking_write(fd, seq, strlen(seq))){
-    return -1;
-  }
-  int r = read_xtsmgraphics_reply(fd, val2);
-  if(r <= 0){
-    return -1;
-  }
-  *val = r;
-  return 0;
-}
-
-// query for Sixel support
-static int
-query_sixel(tinfo* ti, int fd){
-  if(blocking_write(fd, ESC_DA, strlen(ESC_DA))){
-    return -1;
-  }
-  char in;
-  // perhaps the most lackadaisical response is that of st, which returns a
-  // bare ESC[?6c (note no semicolon). this is equivalent to alacritty's
-  // return, both suggesting a VT102. alacritty's miraculous technicolor VT102
-  // can display sixel, but real VT102s don't even reply to XTSMGRAPHICS, so we
-  // detect VT102 + TERM including alacritty, and special-case that.
-  // FIXME need unit tests on this
-  enum {
-    WANT_CSI,
-    WANT_QMARK,
-    WANT_SEMI,
-    WANT_C4, // want '4' to indicate sixel or 'c' to terminate
-    WANT_VT102_C,
-    DONE
-  } state = WANT_CSI;
-  bool in4 = false; // set true after seeing ";4", clear on semi
-  // we're looking for a 4 following a semicolon
-  while(state != DONE && read(fd, &in, 1) == 1){
-    switch(state){
-      case WANT_CSI:
-        if(in == NCKEY_ESC){
-          state = WANT_QMARK;
-        }
-        break;
-      case WANT_QMARK:
-        if(in == '?'){
-          state = WANT_SEMI;
-        }
-        break;
-      case WANT_SEMI:
-        if(in == ';'){
-          if(in4){
-            setup_sixel_bitmaps(ti);
-          }
-          state = WANT_C4;
-        }else if(in == 'c'){
-          if(in4){
-            setup_sixel_bitmaps(ti);
-          }
-          state = DONE;
-        }else if(in == '6'){
-          state = WANT_VT102_C;
-        }
-        in4 = false;
-        break;
-      case WANT_VT102_C:
-        if(in == 'c'){
-          if(ti->alacritty_sixel_hack){
-            setup_sixel_bitmaps(ti);
-          }
-          state = DONE;
-        }else if(in == ';'){
-          state = WANT_C4;
-        }
-        break;
-      case WANT_C4:
-        if(in == 'c'){
-          state = DONE;
-        }else if(in == '4'){
-          in4 = true;
-          state = WANT_SEMI;
-        }else{
-          in4 = false;
-        }
-        break;
-      case DONE:
-      default:
-        break;
-    }
-  }
-  if(ti->bitmap_supported){
-    if(ti->color_registers < 64){
-      ti->bitmap_supported = false;
-    }
-  }
-  return 0;
-}
-*/