question.c

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#include "config.h"
#include <assert.h>
#include <ctype.h>
#include <langinfo.h>
#include <limits.h>
#include <stdbool.h>
#include <stdint.h>
#include <stdio.h>
#include <string.h>
#include "mutt/lib.h"
#include "config/lib.h"
#include "gui/lib.h"
#include "color/lib.h"
#include "key/lib.h"
 
int mw_multi_choice(const char *prompt, const char *letters)
{
  struct MuttWindow *win = msgwin_new(true);
  if (!win)
    return -1;
 
  int choice = 0;
 
  const struct AttrColor *ac_opts = NULL;
  if (simple_color_is_set(MT_COLOR_OPTIONS))
  {
    const struct AttrColor *ac_base = simple_color_get(MT_COLOR_NORMAL);
    ac_base = merged_color_overlay(ac_base, simple_color_get(MT_COLOR_PROMPT));
 
    ac_opts = simple_color_get(MT_COLOR_OPTIONS);
    ac_opts = merged_color_overlay(ac_base, ac_opts);
  }
 
  const struct AttrColor *ac_normal = simple_color_get(MT_COLOR_NORMAL);
  const struct AttrColor *ac_prompt = simple_color_get(MT_COLOR_PROMPT);
 
  if (ac_opts)
  {
    char *cur = NULL;
 
    while ((cur = strchr(prompt, '(')))
    {
      // write the part between prompt and cur using MT_COLOR_PROMPT
      msgwin_add_text_n(win, prompt, cur - prompt, ac_prompt);
 
      if (isalnum(cur[1]) && (cur[2] == ')'))
      {
        // we have a single letter within parentheses - MT_COLOR_OPTIONS
        msgwin_add_text_n(win, cur + 1, 1, ac_opts);
        prompt = cur + 3;
      }
      else
      {
        // we have a parenthesis followed by something else
        msgwin_add_text_n(win, cur, 1, ac_prompt);
        prompt = cur + 1;
      }
    }
  }
 
  msgwin_add_text(win, prompt, ac_prompt);
  msgwin_add_text(win, " ", ac_normal);
 
  msgcont_push_window(win);
  struct MuttWindow *old_focus = window_set_focus(win);
  window_redraw(win);
 
  // ---------------------------------------------------------------------------
  // Event Loop
  struct KeyEvent event = { 0, OP_NULL };
  while (true)
  {
    event = mutt_getch(GETCH_NO_FLAGS);
    mutt_debug(LL_DEBUG1, "mw_multi_choice: EVENT(%d,%d)\n", event.ch, event.op);
 
    if (event.op == OP_REPAINT)
      window_redraw(NULL);
 
    if ((event.op == OP_TIMEOUT) || (event.op == OP_REPAINT))
      continue;
 
    if ((event.op == OP_ABORT) || key_is_return(event.ch))
    {
      choice = -1;
      break;
    }
 
    char *p = strchr(letters, event.ch);
    if (p)
    {
      choice = p - letters + 1;
      break;
    }
 
    if ((event.ch > '0') && (event.ch <= '9'))
    {
      choice = event.ch - '0';
      if (choice <= mutt_str_len(letters))
        break;
    }
  }
  // ---------------------------------------------------------------------------
 
  win = msgcont_pop_window();
  window_set_focus(old_focus);
  mutt_window_free(&win);
 
  return choice;
}
 
static enum QuadOption mw_yesorno(const char *prompt, enum QuadOption def,
                                  struct ConfigDef *cdef)
{
  struct MuttWindow *win = msgwin_new(true);
  if (!win)
    return MUTT_ABORT;
 
  char *yes = N_("yes");
  char *no = N_("no");
  char *trans_yes = _(yes);
  char *trans_no = _(no);
 
  regex_t reyes = { 0 };
  regex_t reno = { 0 };
 
  bool reyes_ok = false;
  bool reno_ok = false;
 
#ifdef OpenBSD
  /* OpenBSD only supports locale C and UTF-8
   * so there is no suitable base system's locale identification
   * Remove this code immediately if this situation changes! */
  char rexyes[16] = "^[+1YyYy]";
  rexyes[6] = toupper(trans_yes[0]);
  rexyes[7] = tolower(trans_yes[0]);
 
  char rexno[16] = "^[-0NnNn]";
  rexno[6] = toupper(trans_no[0]);
  rexno[7] = tolower(trans_no[0]);
 
  if (REG_COMP(&reyes, rexyes, REG_NOSUB) == 0)
    reyes_ok = true;
 
  if (REG_COMP(&reno, rexno, REG_NOSUB) == 0)
    reno_ok = true;
 
#else
  char *expr = NULL;
  reyes_ok = (expr = nl_langinfo(YESEXPR)) && (expr[0] == '^') &&
             (REG_COMP(&reyes, expr, REG_NOSUB) == 0);
  reno_ok = (expr = nl_langinfo(NOEXPR)) && (expr[0] == '^') &&
            (REG_COMP(&reno, expr, REG_NOSUB) == 0);
#endif
 
  if ((yes != trans_yes) && (no != trans_no) && reyes_ok && reno_ok)
  {
    // If all parts of the translation succeeded...
    yes = trans_yes;
    no = trans_no;
  }
  else
  {
    // otherwise, fallback to English
    if (reyes_ok)
    {
      regfree(&reyes);
      reyes_ok = false;
    }
    if (reno_ok)
    {
      regfree(&reno);
      reno_ok = false;
    }
  }
 
  bool show_help_prompt = cdef;
 
  struct Buffer *text = buf_pool_get();
  buf_printf(text, "%s ([%s]/%s%s): ", prompt, (def == MUTT_YES) ? yes : no,
             (def == MUTT_YES) ? no : yes, show_help_prompt ? "/?" : "");
 
  msgwin_set_text(win, buf_string(text), MT_COLOR_PROMPT);
  msgcont_push_window(win);
  struct MuttWindow *old_focus = window_set_focus(win);
 
  struct KeyEvent event = { 0, OP_NULL };
  window_redraw(NULL);
  while (true)
  {
    event = mutt_getch(GETCH_NO_FLAGS);
    if ((event.op == OP_TIMEOUT) || (event.op == OP_REPAINT))
    {
      window_redraw(NULL);
      mutt_refresh();
      continue;
    }
 
    if (key_is_return(event.ch))
      break; // Do nothing, use default
 
    if (event.op == OP_ABORT)
    {
      def = MUTT_ABORT;
      break;
    }
 
    char answer[4] = { 0 };
    answer[0] = event.ch;
    if (reyes_ok ? (regexec(&reyes, answer, 0, 0, 0) == 0) : (tolower(event.ch) == 'y'))
    {
      def = MUTT_YES;
      break;
    }
    if (reno_ok ? (regexec(&reno, answer, 0, 0, 0) == 0) : (tolower(event.ch) == 'n'))
    {
      def = MUTT_NO;
      break;
    }
    if (show_help_prompt && (event.ch == '?'))
    {
      show_help_prompt = false;
      msgwin_clear_text(win);
      buf_printf(text, "$%s - %s\n", cdef->name, cdef->docs);
 
      char hyphen[128] = { 0 };
      mutt_str_hyphenate(hyphen, sizeof(hyphen), cdef->name);
      buf_add_printf(text, "https://neomutt.org/guide/reference#%s\n", hyphen);
 
      msgwin_add_text(win, buf_string(text), simple_color_get(MT_COLOR_NORMAL));
 
      buf_printf(text, "%s ([%s]/%s): ", prompt, (def == MUTT_YES) ? yes : no,
                 (def == MUTT_YES) ? no : yes);
      msgwin_add_text(win, buf_string(text), simple_color_get(MT_COLOR_PROMPT));
      msgwin_add_text(win, NULL, NULL);
 
      window_redraw(NULL);
      mutt_refresh();
    }
 
    mutt_beep(false);
  }
 
  win = msgcont_pop_window();
  window_set_focus(old_focus);
  mutt_window_free(&win);
 
  if (reyes_ok)
    regfree(&reyes);
  if (reno_ok)
    regfree(&reno);
 
  buf_pool_release(&text);
  return def;
}
 
enum QuadOption query_yesorno(const char *prompt, enum QuadOption def)
{
  return mw_yesorno(prompt, def, NULL);
}
 
enum QuadOption query_yesorno_help(const char *prompt, enum QuadOption def,
                                   struct ConfigSubset *sub, const char *name)
{
  struct HashElem *he = cs_subset_create_inheritance(sub, name);
  struct HashElem *he_base = cs_get_base(he);
  assert(DTYPE(he_base->type) == DT_BOOL);
 
  intptr_t value = cs_subset_he_native_get(sub, he, NULL);
  assert(value != INT_MIN);
 
  struct ConfigDef *cdef = he_base->data;
  return mw_yesorno(prompt, def, cdef);
}
 
enum QuadOption query_quadoption(const char *prompt, struct ConfigSubset *sub, const char *name)
{
  struct HashElem *he = cs_subset_create_inheritance(sub, name);
  struct HashElem *he_base = cs_get_base(he);
  assert(DTYPE(he_base->type) == DT_QUAD);
 
  intptr_t value = cs_subset_he_native_get(sub, he, NULL);
  assert(value != INT_MIN);
 
  if ((value == MUTT_YES) || (value == MUTT_NO))
    return value;
 
  struct ConfigDef *cdef = he_base->data;
  enum QuadOption def = (value == MUTT_ASKYES) ? MUTT_YES : MUTT_NO;
  return mw_yesorno(prompt, def, cdef);
}