functions.c

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#include "config.h"
#include <stdbool.h>
#include <stddef.h>
#include "private.h"
#include "mutt/lib.h"
#include "config/lib.h"
#include "core/lib.h"
#include "gui/lib.h"
#include "functions.h"
#include "lib.h"
#include "index/lib.h"
#include "key/lib.h"
#include "menu/lib.h"

static struct SubMenu *SmSidebar = NULL;
 
// clang-format off
static const struct MenuFuncOp OpSidebar[] = { /* map: sidebar */
  { "sidebar-first",          OP_SIDEBAR_FIRST          },
  { "sidebar-last",           OP_SIDEBAR_LAST           },
  { "sidebar-next",           OP_SIDEBAR_NEXT           },
  { "sidebar-next-new",       OP_SIDEBAR_NEXT_NEW       },
  { "sidebar-open",           OP_SIDEBAR_OPEN           },
  { "sidebar-page-down",      OP_SIDEBAR_PAGE_DOWN      },
  { "sidebar-page-up",        OP_SIDEBAR_PAGE_UP        },
  { "sidebar-prev",           OP_SIDEBAR_PREV           },
  { "sidebar-prev-new",       OP_SIDEBAR_PREV_NEW       },
  { "sidebar-toggle-virtual", OP_SIDEBAR_TOGGLE_VIRTUAL },
  { "sidebar-toggle-visible", OP_SIDEBAR_TOGGLE_VISIBLE },
  { NULL, 0 },
};
// clang-format on

void sidebar_init_keys(struct SubMenu *sm_generic)
{
  struct MenuDefinition *md = NULL;
  struct SubMenu *sm = NULL;
 
  sm = km_register_submenu(OpSidebar);
  md = km_register_menu(MENU_SIDEBAR, "sidebar");
  km_menu_add_submenu(md, sm);
 
  SmSidebar = sm;
}
 
struct SubMenu *sidebar_get_submenu(void)
{
  return SmSidebar;
}

bool sb_next(struct SidebarWindowData *wdata)
{
  struct SbEntry **sbep = NULL;
  ARRAY_FOREACH_FROM(sbep, &wdata->entries, wdata->hil_index + 1)
  {
    if (!(*sbep)->is_hidden)
    {
      wdata->hil_index = ARRAY_FOREACH_IDX_sbep;
      return true;
    }
  }
 
  return false;
}

static struct SbEntry **sb_next_new(struct SidebarWindowData *wdata, size_t begin, size_t end)
{
  struct SbEntry **sbep = NULL;
  ARRAY_FOREACH_FROM_TO(sbep, &wdata->entries, begin, end)
  {
    if ((*sbep)->mailbox->has_new || ((*sbep)->mailbox->msg_unread != 0))
      return sbep;
  }
  return NULL;
}

bool sb_prev(struct SidebarWindowData *wdata)
{
  struct SbEntry **sbep = NULL, **prev = NULL;
  ARRAY_FOREACH_TO(sbep, &wdata->entries, wdata->hil_index)
  {
    if (!(*sbep)->is_hidden)
      prev = sbep;
  }
 
  if (prev)
  {
    wdata->hil_index = ARRAY_IDX(&wdata->entries, prev);
    return true;
  }
 
  return false;
}

static struct SbEntry **sb_prev_new(struct SidebarWindowData *wdata, size_t begin, size_t end)
{
  struct SbEntry **sbep = NULL, **prev = NULL;
  ARRAY_FOREACH_FROM_TO(sbep, &wdata->entries, begin, end)
  {
    if ((*sbep)->mailbox->has_new || ((*sbep)->mailbox->msg_unread != 0))
      prev = sbep;
  }
 
  return prev;
}
 
// -----------------------------------------------------------------------------

static int op_sidebar_first(struct SidebarWindowData *wdata, const struct KeyEvent *event)
{
  if (!mutt_window_is_visible(wdata->win))
    return FR_NO_ACTION;
 
  if (ARRAY_EMPTY(&wdata->entries) || (wdata->hil_index < 0))
    return FR_NO_ACTION;
 
  int orig_hil_index = wdata->hil_index;
 
  wdata->hil_index = 0;
  if ((*ARRAY_GET(&wdata->entries, wdata->hil_index))->is_hidden)
    if (!sb_next(wdata))
      wdata->hil_index = orig_hil_index;
 
  if (orig_hil_index == wdata->hil_index)
    return FR_NO_ACTION;
 
  wdata->win->actions |= WA_RECALC;
  return FR_SUCCESS;
}

static int op_sidebar_last(struct SidebarWindowData *wdata, const struct KeyEvent *event)
{
  if (!mutt_window_is_visible(wdata->win))
    return FR_NO_ACTION;
 
  if (ARRAY_EMPTY(&wdata->entries) || (wdata->hil_index < 0))
    return FR_NO_ACTION;
 
  int orig_hil_index = wdata->hil_index;
 
  wdata->hil_index = ARRAY_SIZE(&wdata->entries);
  if (!sb_prev(wdata))
    wdata->hil_index = orig_hil_index;
 
  if (orig_hil_index == wdata->hil_index)
    return FR_NO_ACTION;
 
  wdata->win->actions |= WA_RECALC;
  return FR_SUCCESS;
}

static int op_sidebar_next(struct SidebarWindowData *wdata, const struct KeyEvent *event)
{
  if (!mutt_window_is_visible(wdata->win))
    return FR_NO_ACTION;
 
  if (ARRAY_EMPTY(&wdata->entries) || (wdata->hil_index < 0))
    return FR_NO_ACTION;
 
  if (!sb_next(wdata))
    return FR_NO_ACTION;
 
  wdata->win->actions |= WA_RECALC;
  return FR_SUCCESS;
}

static int op_sidebar_next_new(struct SidebarWindowData *wdata, const struct KeyEvent *event)
{
  if (!mutt_window_is_visible(wdata->win))
    return FR_NO_ACTION;
 
  const size_t max_entries = ARRAY_SIZE(&wdata->entries);
  if ((max_entries == 0) || (wdata->hil_index < 0))
    return FR_NO_ACTION;
 
  const bool c_sidebar_next_new_wrap = cs_subset_bool(NeoMutt->sub, "sidebar_next_new_wrap");
  struct SbEntry **sbep = NULL;
  if ((sbep = sb_next_new(wdata, wdata->hil_index + 1, max_entries)) ||
      (c_sidebar_next_new_wrap && (sbep = sb_next_new(wdata, 0, wdata->hil_index))))
  {
    wdata->hil_index = ARRAY_IDX(&wdata->entries, sbep);
    wdata->win->actions |= WA_RECALC;
    return FR_SUCCESS;
  }
 
  return FR_NO_ACTION;
}

static int op_sidebar_open(struct SidebarWindowData *wdata, const struct KeyEvent *event)
{
  struct MuttWindow *win_sidebar = wdata->win;
  if (!mutt_window_is_visible(win_sidebar))
    return FR_NO_ACTION;
 
  struct MuttWindow *dlg = dialog_find(win_sidebar);
  index_change_folder(dlg, sb_get_highlight(win_sidebar));
  return FR_SUCCESS;
}

static int op_sidebar_page_down(struct SidebarWindowData *wdata, const struct KeyEvent *event)
{
  if (!mutt_window_is_visible(wdata->win))
    return FR_NO_ACTION;
 
  if (ARRAY_EMPTY(&wdata->entries) || (wdata->bot_index < 0))
    return FR_NO_ACTION;
 
  int orig_hil_index = wdata->hil_index;
 
  wdata->hil_index = wdata->bot_index;
  sb_next(wdata);
  /* If the rest of the entries are hidden, go up to the last unhidden one */
  if ((*ARRAY_GET(&wdata->entries, wdata->hil_index))->is_hidden)
    sb_prev(wdata);
 
  if (orig_hil_index == wdata->hil_index)
    return FR_NO_ACTION;
 
  wdata->win->actions |= WA_RECALC;
  return FR_SUCCESS;
}

static int op_sidebar_page_up(struct SidebarWindowData *wdata, const struct KeyEvent *event)
{
  if (!mutt_window_is_visible(wdata->win))
    return FR_NO_ACTION;
 
  if (ARRAY_EMPTY(&wdata->entries) || (wdata->top_index < 0))
    return FR_NO_ACTION;
 
  int orig_hil_index = wdata->hil_index;
 
  wdata->hil_index = wdata->top_index;
  sb_prev(wdata);
  /* If the rest of the entries are hidden, go down to the last unhidden one */
  if ((*ARRAY_GET(&wdata->entries, wdata->hil_index))->is_hidden)
    sb_next(wdata);
 
  if (orig_hil_index == wdata->hil_index)
    return FR_NO_ACTION;
 
  wdata->win->actions |= WA_RECALC;
  return FR_SUCCESS;
}

static int op_sidebar_prev(struct SidebarWindowData *wdata, const struct KeyEvent *event)
{
  if (!mutt_window_is_visible(wdata->win))
    return FR_NO_ACTION;
 
  if (ARRAY_EMPTY(&wdata->entries) || (wdata->hil_index < 0))
    return FR_NO_ACTION;
 
  if (!sb_prev(wdata))
    return FR_NO_ACTION;
 
  wdata->win->actions |= WA_RECALC;
  return FR_SUCCESS;
}

static int op_sidebar_prev_new(struct SidebarWindowData *wdata, const struct KeyEvent *event)
{
  if (!mutt_window_is_visible(wdata->win))
    return FR_NO_ACTION;
 
  const size_t max_entries = ARRAY_SIZE(&wdata->entries);
  if ((max_entries == 0) || (wdata->hil_index < 0))
    return FR_NO_ACTION;
 
  const bool c_sidebar_next_new_wrap = cs_subset_bool(NeoMutt->sub, "sidebar_next_new_wrap");
  struct SbEntry **sbep = NULL;
  if ((sbep = sb_prev_new(wdata, 0, wdata->hil_index)) ||
      (c_sidebar_next_new_wrap &&
       (sbep = sb_prev_new(wdata, wdata->hil_index + 1, max_entries))))
  {
    wdata->hil_index = ARRAY_IDX(&wdata->entries, sbep);
    wdata->win->actions |= WA_RECALC;
    return FR_SUCCESS;
  }
 
  return FR_NO_ACTION;
}

static int op_sidebar_toggle_visible(struct SidebarWindowData *wdata,
                                     const struct KeyEvent *event)
{
  bool_str_toggle(NeoMutt->sub, "sidebar_visible", NULL);
  mutt_window_reflow(NULL);
  return FR_SUCCESS;
}

static int op_sidebar_toggle_virtual(struct SidebarWindowData *wdata,
                                     const struct KeyEvent *event)
{
  return FR_SUCCESS;
}
 
// -----------------------------------------------------------------------------

static const struct SidebarFunction SidebarFunctions[] = {
  // clang-format off
  { OP_SIDEBAR_FIRST,          op_sidebar_first },
  { OP_SIDEBAR_LAST,           op_sidebar_last },
  { OP_SIDEBAR_NEXT,           op_sidebar_next },
  { OP_SIDEBAR_NEXT_NEW,       op_sidebar_next_new },
  { OP_SIDEBAR_OPEN,           op_sidebar_open },
  { OP_SIDEBAR_PAGE_DOWN,      op_sidebar_page_down },
  { OP_SIDEBAR_PAGE_UP,        op_sidebar_page_up },
  { OP_SIDEBAR_PREV,           op_sidebar_prev },
  { OP_SIDEBAR_PREV_NEW,       op_sidebar_prev_new },
  { OP_SIDEBAR_TOGGLE_VIRTUAL, op_sidebar_toggle_virtual },
  { OP_SIDEBAR_TOGGLE_VISIBLE, op_sidebar_toggle_visible },
  { 0, NULL },
  // clang-format on
};

int sb_function_dispatcher(struct MuttWindow *win, const struct KeyEvent *event)
{
  if (!event || !win || !win->wdata)
    return FR_UNKNOWN;
 
  const int op = event->op;
  struct SidebarWindowData *wdata = win->wdata;
  int rc = FR_UNKNOWN;
  for (size_t i = 0; SidebarFunctions[i].op != OP_NULL; i++)
  {
    const struct SidebarFunction *fn = &SidebarFunctions[i];
    if (fn->op == op)
    {
      rc = fn->function(wdata, 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));
 
  return FR_SUCCESS; // Whatever the outcome, we handled it
}