Add support for bracketed paste mode + confirm-to-send multiline strings

Slightly modified patch from http://dev.yorhel.nl/ncdc/bug/66

Author: Yorhel

src/commands.c

@@ -1313,6 +1313,13 @@ void cmd_handle(char *ostr) {
   // it is a command, extract cmd and args
   } else {
     cmd++;
+
+    if(strchr(cmd, '\n')) {
+      g_free(str);
+      ui_m(NULL, 0, "Commands cannot contain newlines");
+      return;
+    }
+
     char *sep = strchr(cmd, ' ');
     if(sep)
       *sep = 0;

src/main.c

@@ -50,7 +50,9 @@ GMainLoop *main_loop;
 #define INPT_CODE(key)  ((gunichar)((key)&G_GUINT64_CONSTANT(0xFFFFFFFF)))
 #define INPT_TYPE(key)  ((char)((key)>>32))
 
-#define KEY_ESCAPE (KEY_MAX+1)
+#define KEY_ESCAPE                (KEY_MAX+1)
+#define KEY_BRACKETED_PASTE_START (KEY_ESCAPE+1)
+#define KEY_BRACKETED_PASTE_END   (KEY_BRACKETED_PASTE_START+1)
 
 #endif
 
@@ -126,7 +128,7 @@ static void handle_input() {
       if(INPT_TYPE(key) != 1)
         continue;
       if(INPT_CODE(key) == '[') {
-        curignore = 0;
+        curignore = 1;
         continue;
       }
       key |= (guint64)3<<32; // a not very nice way of saying "turn this key into a INPT_ALT"
@@ -503,6 +505,9 @@ int main(int argc, char **argv) {
     refresh();
     endwin();
 
+    // reset bracketed paste mode
+    printf("\x1b[?2004l"); // http://www.xfree86.org/current/ctlseqs.html#C1%20%288-Bit%29%20Control%20Characters
+
     printf("Flushing unsaved data to disk...");
     fflush(stdout);
   }

src/ui.c

@@ -254,6 +254,13 @@ void ui_init() {
   keypad(stdscr, 1);
   nodelay(stdscr, 1);
 
+  // ensure curses is init'd before event-keys defined before events happen
+  define_key("\x1b[200~", KEY_BRACKETED_PASTE_START);
+  define_key("\x1b[201~", KEY_BRACKETED_PASTE_END);
+
+  const char paste_mode[] = "\x1b[?2004h";
+  write(STDOUT_FILENO, paste_mode, sizeof(paste_mode)-1);
+
   // global textinput field
   ui_global_textinput = ui_textinput_create(TRUE, cmd_suggest);
 

src/ui_textinput.c

@@ -152,6 +152,7 @@ struct ui_textinput_t {
   void (*complete)(char *, char **);
   char *c_q, *c_last, **c_sug;
   int c_cur;
+  gboolean bracketed_paste;
 };
 
 #endif
@@ -163,6 +164,7 @@ ui_textinput_t *ui_textinput_create(gboolean usehist, void (*complete)(char *, c
   ti->usehist = usehist;
   ti->s_pos = -1;
   ti->complete = complete;
+  ti->bracketed_paste = FALSE;
   return ti;
 }
 
@@ -284,7 +286,9 @@ void ui_textinput_draw(ui_textinput_t *ti, int y, int x, int col, ui_cursor_t *c
     if(f <= -col)
       break;
     if(f < 0) {
-      addnstr(ostr, str-ostr);
+      // Don't display control characters
+      if(*ostr >= 32)
+        addnstr(ostr, str-ostr);
       if(i < ti->pos)
         pos += l;
     }
@@ -426,12 +430,47 @@ gboolean ui_textinput_key(ui_textinput_t *ti, guint64 key, char **str) {
       return FALSE;
     break;
   case INPT_CTRL('i'):     // tab   - autocomplete
-    ui_textinput_complete(ti);
-    completereset = FALSE;
+    if(ti->bracketed_paste) {
+      g_string_insert_unichar(ti->str, g_utf8_offset_to_pointer(ti->str->str, ti->pos)-ti->str->str, ' ');
+      ti->pos++;
+      return FALSE;
+    } else {
+      ui_textinput_complete(ti);
+      completereset = FALSE;
+    }
     break;
   case INPT_CTRL('j'):     // newline - accept & clear
+    if(ti->bracketed_paste) {
+      g_string_insert_unichar(ti->str, g_utf8_offset_to_pointer(ti->str->str, ti->pos)-ti->str->str, '\n');
+      ti->pos++;
+      return FALSE;
+    }
+
+    // if not responded to, input simply keeps buffering; avoids modality
+    // reappearing after each (non-bracketed) newline avoids user confusion
+    // UTF-8: <32 always 1 byte from trusted input
+    {
+      int num_lines = 1;
+      char *c;
+      for(c=ti->str->str; *c; c++)
+        num_lines += *c == '\n';
+      if(num_lines > 1) {
+        ui_mf(NULL, UIM_NOLOG, "Press Ctrl-y to accept %d-line paste", num_lines);
+        break;
+      }
+    }
+
+    *str = ui_textinput_reset(ti);
+    break;
+  case INPT_CTRL('y'):     // C-y   - accept bracketed paste
     *str = ui_textinput_reset(ti);
     break;
+  case KEY_BRACKETED_PASTE_START:
+    ti->bracketed_paste = TRUE;
+    break;
+  case KEY_BRACKETED_PASTE_END:
+    ti->bracketed_paste = FALSE;
+    break;
   default:
     if(INPT_TYPE(key) == 1) { // char
       g_string_insert_unichar(ti->str, g_utf8_offset_to_pointer(ti->str->str, ti->pos)-ti->str->str, INPT_CODE(key));