Integrate KodoTerm for SSH terminal sessions

2026-03-01 10:36:06 -07:00
parent c3369b8e48
commit 776ddc1a53
503 changed files with 22870 additions and 95 deletions
@@ -0,0 +1,226 @@
+#include "vterm_internal.h"
+
+#include <stdio.h>
+
+#include "utf8.h"
+
+void vterm_keyboard_unichar(VTerm *vt, uint32_t c, VTermModifier mod)
+{
+  /* The shift modifier is never important for Unicode characters
+   * apart from Space
+   */
+  if(c != ' ')
+    mod &= ~VTERM_MOD_SHIFT;
+
+  if(mod == 0) {
+    // Normal text - ignore just shift
+    char str[6];
+    int seqlen = fill_utf8(c, str);
+    vterm_push_output_bytes(vt, str, seqlen);
+    return;
+  }
+
+  int needs_CSIu;
+  switch(c) {
+    /* Special Ctrl- letters that can't be represented elsewise */
+    case 'i': case 'j': case 'm': case '[':
+      needs_CSIu = 1;
+      break;
+    /* Ctrl-\ ] ^ _ don't need CSUu */
+    case '\\': case ']': case '^': case '_':
+      needs_CSIu = 0;
+      break;
+    /* Shift-space needs CSIu */
+    case ' ':
+      needs_CSIu = !!(mod & VTERM_MOD_SHIFT);
+      break;
+    /* All other characters needs CSIu except for letters a-z */
+    default:
+      needs_CSIu = (c < 'a' || c > 'z');
+  }
+
+  /* ALT we can just prefix with ESC; anything else requires CSI u */
+  if(needs_CSIu && (mod & ~VTERM_MOD_ALT)) {
+    vterm_push_output_sprintf_ctrl(vt, C1_CSI, "%d;%du", c, mod+1);
+    return;
+  }
+
+  if(mod & VTERM_MOD_CTRL)
+    c &= 0x1f;
+
+  vterm_push_output_sprintf(vt, "%s%c", mod & VTERM_MOD_ALT ? ESC_S : "", c);
+}
+
+typedef struct {
+  enum {
+    KEYCODE_NONE,
+    KEYCODE_LITERAL,
+    KEYCODE_TAB,
+    KEYCODE_ENTER,
+    KEYCODE_SS3,
+    KEYCODE_CSI,
+    KEYCODE_CSI_CURSOR,
+    KEYCODE_CSINUM,
+    KEYCODE_KEYPAD,
+  } type;
+  char literal;
+  int csinum;
+} keycodes_s;
+
+static keycodes_s keycodes[] = {
+  { KEYCODE_NONE }, // NONE
+
+  { KEYCODE_ENTER,   '\r'   }, // ENTER
+  { KEYCODE_TAB,     '\t'   }, // TAB
+  { KEYCODE_LITERAL, '\x7f' }, // BACKSPACE == ASCII DEL
+  { KEYCODE_LITERAL, '\x1b' }, // ESCAPE
+
+  { KEYCODE_CSI_CURSOR, 'A' }, // UP
+  { KEYCODE_CSI_CURSOR, 'B' }, // DOWN
+  { KEYCODE_CSI_CURSOR, 'D' }, // LEFT
+  { KEYCODE_CSI_CURSOR, 'C' }, // RIGHT
+
+  { KEYCODE_CSINUM, '~', 2 },  // INS
+  { KEYCODE_CSINUM, '~', 3 },  // DEL
+  { KEYCODE_CSI_CURSOR, 'H' }, // HOME
+  { KEYCODE_CSI_CURSOR, 'F' }, // END
+  { KEYCODE_CSINUM, '~', 5 },  // PAGEUP
+  { KEYCODE_CSINUM, '~', 6 },  // PAGEDOWN
+};
+
+static keycodes_s keycodes_fn[] = {
+  { KEYCODE_NONE },            // F0 - shouldn't happen
+  { KEYCODE_SS3,    'P' },     // F1
+  { KEYCODE_SS3,    'Q' },     // F2
+  { KEYCODE_SS3,    'R' },     // F3
+  { KEYCODE_SS3,    'S' },     // F4
+  { KEYCODE_CSINUM, '~', 15 }, // F5
+  { KEYCODE_CSINUM, '~', 17 }, // F6
+  { KEYCODE_CSINUM, '~', 18 }, // F7
+  { KEYCODE_CSINUM, '~', 19 }, // F8
+  { KEYCODE_CSINUM, '~', 20 }, // F9
+  { KEYCODE_CSINUM, '~', 21 }, // F10
+  { KEYCODE_CSINUM, '~', 23 }, // F11
+  { KEYCODE_CSINUM, '~', 24 }, // F12
+};
+
+static keycodes_s keycodes_kp[] = {
+  { KEYCODE_KEYPAD, '0', 'p' }, // KP_0
+  { KEYCODE_KEYPAD, '1', 'q' }, // KP_1
+  { KEYCODE_KEYPAD, '2', 'r' }, // KP_2
+  { KEYCODE_KEYPAD, '3', 's' }, // KP_3
+  { KEYCODE_KEYPAD, '4', 't' }, // KP_4
+  { KEYCODE_KEYPAD, '5', 'u' }, // KP_5
+  { KEYCODE_KEYPAD, '6', 'v' }, // KP_6
+  { KEYCODE_KEYPAD, '7', 'w' }, // KP_7
+  { KEYCODE_KEYPAD, '8', 'x' }, // KP_8
+  { KEYCODE_KEYPAD, '9', 'y' }, // KP_9
+  { KEYCODE_KEYPAD, '*', 'j' }, // KP_MULT
+  { KEYCODE_KEYPAD, '+', 'k' }, // KP_PLUS
+  { KEYCODE_KEYPAD, ',', 'l' }, // KP_COMMA
+  { KEYCODE_KEYPAD, '-', 'm' }, // KP_MINUS
+  { KEYCODE_KEYPAD, '.', 'n' }, // KP_PERIOD
+  { KEYCODE_KEYPAD, '/', 'o' }, // KP_DIVIDE
+  { KEYCODE_KEYPAD, '\n', 'M' }, // KP_ENTER
+  { KEYCODE_KEYPAD, '=', 'X' }, // KP_EQUAL
+};
+
+void vterm_keyboard_key(VTerm *vt, VTermKey key, VTermModifier mod)
+{
+  if(key == VTERM_KEY_NONE)
+    return;
+
+  keycodes_s k;
+  if(key < VTERM_KEY_FUNCTION_0) {
+    if(key >= sizeof(keycodes)/sizeof(keycodes[0]))
+      return;
+    k = keycodes[key];
+  }
+  else if(key >= VTERM_KEY_FUNCTION_0 && key <= VTERM_KEY_FUNCTION_MAX) {
+    if((key - VTERM_KEY_FUNCTION_0) >= sizeof(keycodes_fn)/sizeof(keycodes_fn[0]))
+      return;
+    k = keycodes_fn[key - VTERM_KEY_FUNCTION_0];
+  }
+  else if(key >= VTERM_KEY_KP_0) {
+    if((key - VTERM_KEY_KP_0) >= sizeof(keycodes_kp)/sizeof(keycodes_kp[0]))
+      return;
+    k = keycodes_kp[key - VTERM_KEY_KP_0];
+  }
+
+  switch(k.type) {
+  case KEYCODE_NONE:
+    break;
+
+  case KEYCODE_TAB:
+    /* Shift-Tab is CSI Z but plain Tab is 0x09 */
+    if(mod == VTERM_MOD_SHIFT)
+      vterm_push_output_sprintf_ctrl(vt, C1_CSI, "Z");
+    else if(mod & VTERM_MOD_SHIFT)
+      vterm_push_output_sprintf_ctrl(vt, C1_CSI, "1;%dZ", mod+1);
+    else
+      goto case_LITERAL;
+    break;
+
+  case KEYCODE_ENTER:
+    /* Enter is CRLF in newline mode, but just LF in linefeed */
+    if(vt->state->mode.newline)
+      vterm_push_output_sprintf(vt, "\r\n");
+    else
+      goto case_LITERAL;
+    break;
+
+  case KEYCODE_LITERAL: case_LITERAL:
+    if(mod & (VTERM_MOD_SHIFT|VTERM_MOD_CTRL))
+      vterm_push_output_sprintf_ctrl(vt, C1_CSI, "%d;%du", k.literal, mod+1);
+    else
+      vterm_push_output_sprintf(vt, mod & VTERM_MOD_ALT ? ESC_S "%c" : "%c", k.literal);
+    break;
+
+  case KEYCODE_SS3: case_SS3:
+    if(mod == 0)
+      vterm_push_output_sprintf_ctrl(vt, C1_SS3, "%c", k.literal);
+    else
+      goto case_CSI;
+    break;
+
+  case KEYCODE_CSI: case_CSI:
+    if(mod == 0)
+      vterm_push_output_sprintf_ctrl(vt, C1_CSI, "%c", k.literal);
+    else
+      vterm_push_output_sprintf_ctrl(vt, C1_CSI, "1;%d%c", mod + 1, k.literal);
+    break;
+
+  case KEYCODE_CSINUM:
+    if(mod == 0)
+      vterm_push_output_sprintf_ctrl(vt, C1_CSI, "%d%c", k.csinum, k.literal);
+    else
+      vterm_push_output_sprintf_ctrl(vt, C1_CSI, "%d;%d%c", k.csinum, mod + 1, k.literal);
+    break;
+
+  case KEYCODE_CSI_CURSOR:
+    if(vt->state->mode.cursor)
+      goto case_SS3;
+    else
+      goto case_CSI;
+
+  case KEYCODE_KEYPAD:
+    if(vt->state->mode.keypad) {
+      k.literal = k.csinum;
+      goto case_SS3;
+    }
+    else
+      goto case_LITERAL;
+  }
+}
+
+void vterm_keyboard_start_paste(VTerm *vt)
+{
+  if(vt->state->mode.bracketpaste)
+    vterm_push_output_sprintf_ctrl(vt, C1_CSI, "200~");
+}
+
+void vterm_keyboard_end_paste(VTerm *vt)
+{
+  if(vt->state->mode.bracketpaste)
+    vterm_push_output_sprintf_ctrl(vt, C1_CSI, "201~");
+}