functions.c

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#include "config.h"
#include <stdbool.h>
#include <stddef.h>
#include <stdint.h>
#include "mutt/lib.h"
#include "config/lib.h"
#include "core/lib.h"
#include "gui/lib.h"
#include "mutt.h"
#include "functions.h"
#include "lib.h"
#include "editor/lib.h"
#include "history/lib.h"
#include "key/lib.h"
#include "module_data.h"
#include "type.h"
 
#define MUTT_SEARCH_UP 1
#define MUTT_SEARCH_DOWN 2

static int search(struct Menu *menu, int op, int *match)
{
  struct MenuModuleData *mod_data = neomutt_get_module_data(NeoMutt, MODULE_ID_MENU);
  int reg_rc = 0;
  int wrap = 0;
  int search_dir;
  int rc = FR_ERROR;
  regex_t re = { 0 };
  struct Buffer *buf = buf_pool_get();
 
  *match = -1;
 
  char *search_buf = (menu->md && (menu->md->id < MENU_MAX)) ?
                         mod_data->search_buffers[menu->md->id] :
                         NULL;
 
  if (!(search_buf && *search_buf) || ((op != OP_SEARCH_NEXT) && (op != OP_SEARCH_OPPOSITE)))
  {
    buf_strcpy(buf, search_buf && (search_buf[0] != '\0') ? search_buf : "");
    if ((mw_get_field(((op == OP_SEARCH) || (op == OP_SEARCH_NEXT)) ? _("Search for: ") : _("Reverse search for: "),
                      buf, MUTT_COMP_CLEAR, HC_OTHER, NULL, NULL) != 0) ||
        buf_is_empty(buf))
    {
      rc = FR_NO_ACTION;
      goto done;
    }
    if (menu->md && (menu->md->id < MENU_MAX))
    {
      mutt_str_replace(&mod_data->search_buffers[menu->md->id], buf_string(buf));
      search_buf = mod_data->search_buffers[menu->md->id];
    }
    menu->search_dir = ((op == OP_SEARCH) || (op == OP_SEARCH_NEXT)) ?
                           MUTT_SEARCH_DOWN :
                           MUTT_SEARCH_UP;
  }
 
  search_dir = (menu->search_dir == MUTT_SEARCH_UP) ? -1 : 1;
  if (op == OP_SEARCH_OPPOSITE)
    search_dir = -search_dir;
 
  if (search_buf)
  {
    uint16_t flags = mutt_mb_is_lower(search_buf) ? REG_ICASE : 0;
    reg_rc = REG_COMP(&re, search_buf, REG_NOSUB | flags);
  }
 
  if (reg_rc != 0)
  {
    regerror(reg_rc, &re, buf->data, buf->dsize);
    mutt_error("%s", buf_string(buf));
    goto done;
  }
 
  *match = menu->current + search_dir;
search_next:
  if (wrap)
    mutt_message(_("Search wrapped to top"));
  while ((*match >= 0) && (*match < menu->max))
  {
    if (menu->search(menu, &re, *match) == 0)
    {
      regfree(&re);
      rc = FR_SUCCESS;
      goto done;
    }
 
    *match += search_dir;
  }
 
  const bool c_wrap_search = cs_subset_bool(menu->sub, "wrap_search");
  if (c_wrap_search && (wrap++ == 0))
  {
    *match = (search_dir == 1) ? 0 : menu->max - 1;
    goto search_next;
  }
  regfree(&re);
  mutt_error(_("Not found"));
 
done:
  buf_pool_release(&buf);
  return rc;
}
 
// -----------------------------------------------------------------------------

static int menu_movement(struct MenuFunctionData *fdata, const struct KeyEvent *event)
{
  struct Menu *menu = fdata->menu;
  const int old_top = menu->top;
  const int old_current = menu->current;
  MenuRedrawFlags flags = MENU_REDRAW_NONE;
 
  const int count = event->count;
  switch (event->op)
  {
    case OP_BOTTOM_PAGE:
      flags = menu_bottom_page(menu);
      return (menu->max == 0) ? FR_ERROR : FR_SUCCESS;
 
    case OP_CURRENT_BOTTOM:
      flags = menu_current_bottom(menu);
      return (menu->max == 0) ? FR_ERROR : FR_SUCCESS;
 
    case OP_CURRENT_MIDDLE:
      flags = menu_current_middle(menu);
      return (menu->max == 0) ? FR_ERROR : FR_SUCCESS;
 
    case OP_CURRENT_TOP:
      flags = menu_current_top(menu);
      return (menu->max == 0) ? FR_ERROR : FR_SUCCESS;
 
    case OP_FIRST_ENTRY:
      flags = menu_first_entry(menu, count);
      return (menu->max == 0) ? FR_ERROR : FR_SUCCESS;
 
    case OP_HALF_DOWN:
      menu_half_down(menu, count);
      return FR_SUCCESS;
 
    case OP_HALF_UP:
      menu_half_up(menu, count);
      return FR_SUCCESS;
 
    case OP_LAST_ENTRY:
      flags = menu_last_entry(menu, count);
      return (menu->max == 0) ? FR_ERROR : FR_SUCCESS;
 
    case OP_MIDDLE_PAGE:
      flags = menu_middle_page(menu);
      return (menu->max == 0) ? FR_ERROR : FR_SUCCESS;
 
    case OP_NEXT_ENTRY:
      flags = menu_next_entry(menu, count);
      return ((flags == MENU_REDRAW_NONE) && (menu->top == old_top) &&
              (menu->current == old_current)) ?
                 FR_ERROR :
                 FR_SUCCESS;
 
    case OP_NEXT_LINE:
      flags = menu_next_line(menu, count);
      return ((flags == MENU_REDRAW_NONE) && (menu->top == old_top) &&
              (menu->current == old_current)) ?
                 FR_ERROR :
                 FR_SUCCESS;
 
    case OP_NEXT_PAGE:
      menu_next_page(menu, count);
      return FR_SUCCESS;
 
    case OP_PREV_ENTRY:
      flags = menu_prev_entry(menu, count);
      return ((flags == MENU_REDRAW_NONE) && (menu->top == old_top) &&
              (menu->current == old_current)) ?
                 FR_ERROR :
                 FR_SUCCESS;
 
    case OP_PREV_LINE:
      flags = menu_prev_line(menu, count);
      return ((flags == MENU_REDRAW_NONE) && (menu->top == old_top) &&
              (menu->current == old_current)) ?
                 FR_ERROR :
                 FR_SUCCESS;
 
    case OP_PREV_PAGE:
      menu_prev_page(menu, count);
      return FR_SUCCESS;
 
    case OP_TOP_PAGE:
      menu_top_page(menu);
      return FR_SUCCESS;
 
    default:
      return FR_UNKNOWN;
  }
}

static int menu_search(struct MenuFunctionData *fdata, const struct KeyEvent *event)
{
  struct Menu *menu = fdata->menu;
  if (menu->search)
  {
    int index = -1;
    const int rc = search(menu, event->op, &index);
    if ((rc == FR_SUCCESS) && (index != -1))
      menu_set_index(menu, index);
    return rc;
  }
  return FR_SUCCESS;
}

static int op_help(struct MenuFunctionData *fdata, const struct KeyEvent *event)
{
  struct Menu *menu = fdata->menu;
  mutt_help(menu->md);
  menu->redraw = MENU_REDRAW_FULL;
  return FR_SUCCESS;
}

static int op_jump(struct MenuFunctionData *fdata, const struct KeyEvent *event)
{
  struct Menu *menu = fdata->menu;
  if (menu->max == 0)
  {
    mutt_error(_("No entries"));
    return FR_ERROR;
  }
 
  struct Buffer *buf = buf_pool_get();
  int rc = FR_ERROR;
 
  int num = event->count;
  if (num == 0)
  {
    if ((mw_get_field(_("Jump to: "), buf, MUTT_COMP_NONE, HC_OTHER, NULL, NULL) != 0) ||
        buf_is_empty(buf))
    {
      rc = FR_NO_ACTION;
      goto done;
    }
 
    if (!mutt_str_atoi_full(buf_string(buf), &num) || (num < 1) || (num > menu->max))
    {
      mutt_error(_("Invalid index number"));
      goto done;
    }
  }
 
  menu_set_index(menu, num - 1); // msg numbers are 0-based
  rc = FR_SUCCESS;
 
done:
  buf_pool_release(&buf);
  return rc;
}
 
// -----------------------------------------------------------------------------

static const struct MenuFunction MenuFunctions[] = {
  // clang-format off
  { OP_BOTTOM_PAGE,            menu_movement },
  { OP_CURRENT_BOTTOM,         menu_movement },
  { OP_CURRENT_MIDDLE,         menu_movement },
  { OP_CURRENT_TOP,            menu_movement },
  { OP_FIRST_ENTRY,            menu_movement },
  { OP_HALF_DOWN,              menu_movement },
  { OP_HALF_UP,                menu_movement },
  { OP_HELP,                   op_help },
  { OP_JUMP,                   op_jump },
  { OP_LAST_ENTRY,             menu_movement },
  { OP_MIDDLE_PAGE,            menu_movement },
  { OP_NEXT_ENTRY,             menu_movement },
  { OP_NEXT_LINE,              menu_movement },
  { OP_NEXT_PAGE,              menu_movement },
  { OP_PREV_ENTRY,             menu_movement },
  { OP_PREV_LINE,              menu_movement },
  { OP_PREV_PAGE,              menu_movement },
  { OP_SEARCH,                 menu_search },
  { OP_SEARCH_NEXT,            menu_search },
  { OP_SEARCH_OPPOSITE,        menu_search },
  { OP_SEARCH_REVERSE,         menu_search },
  { OP_TOP_PAGE,               menu_movement },
  { 0, NULL },
  // clang-format on
};

int menu_function_dispatcher(struct MuttWindow *win, const struct KeyEvent *event)
{
  if (!event || !win || !win->wdata)
    return FR_UNKNOWN;
 
  const int op = event->op;
  struct Menu *menu = win->wdata;
 
  struct MenuFunctionData fdata = {
    .n = NeoMutt,
    .menu = menu,
  };
 
  int rc = FR_UNKNOWN;
  for (size_t i = 0; MenuFunctions[i].op != OP_NULL; i++)
  {
    const struct MenuFunction *fn = &MenuFunctions[i];
    if (fn->op == op)
    {
      rc = fn->function(&fdata, event);
      break;
    }
  }
 
  if (rc == FR_UNKNOWN) // Not our function
    return rc;
 
  const char *result = dispatcher_get_retval_name(rc);
  mutt_debug(LL_DEBUG1, "Handled %s (%d) -> %s\n", opcodes_get_name(op), op, NONULL(result));
 
  dispatcher_flush_on_error(rc);
  return rc;
}