dorne/cursetree/cursetree.c

#include <stdlib.h>

#include "ncrswrap.h"
#include "tree.h"

int ct_init(struct ct_tree **const tree) {
  /* Initialise NCurses Library & Root Node */
  init_ncurses();
  init_tree(tree);

  return EXIT_SUCCESS;
}


void ct_update(struct ct_tree *const tree) {
  struct ct_dims * term_dims;
  int term_width, term_height;
  const int key = wgetch(curscr);

  /* ncurses binds a SIGWINCH handler if SIGWINCH has SIG_DFL disposition
   * when initscr(3x) is called. This handler emits KEY_RESIZE (decimal 410) to stdin.
   * REF: manpages -> resizeterm(3x) initscr(3x) wgetch(3x)
   */
  switch (key) {
  case -1:
    wclear(tree->root->child[0]->win);
    mvwprintw(tree->root->child[0]->win, 0, 0, "    \r-1\n");
    wrefresh(tree->root->child[0]->win);
    return;
  case KEY_RESIZE:
    termsize(term_width, term_height);
    term_dims = __alloc_dims(0, 0, term_width, term_height);
    resize_tree(tree, term_dims);
    // flush ncurses virtual screen -> physical screen
    doupdate();
    break;
  default:
    wclear(tree->root->child[0]->win);
    mvwprintw(tree->root->child[0]->win, 0, 0, "    \r%d\n", key);
    wrefresh(tree->root->child[0]->win);
    break;
  }
}