change DORNE_*_H namespacing to CURSETREE_*_H

cursetree/ncrswrap.c

@@ -0,0 +1,83 @@
+#include <locale.h>
+#include <unistd.h>
+
+#include "ncrswrap.h"
+
+#define CRS_LOCALE "en_US.UTF-8"
+
+/* Set ncurses terminal mode (buffering, character processing,
+ * Key->SIG handling, and other termios(3) functionality).
+ */
+int termmode(const enum crs_termmode mode) {
+  switch (mode) {
+  case TMODE_CBREAK:
+    return cbreak();
+  case TMODE_RAW:
+    return raw();
+  case TMODE_NOCBREAK:
+    return nocbreak();
+  case TMODE_NORAW:
+    return noraw();
+  default:
+    /* defaulting is not possible. */
+    return 1;
+  }
+}
+
+/* Apply a default IO configuration for an ncurses WINDOW.
+ */
+static inline void __conf_window(WINDOW *const win) {
+  nodelay(win, TRUE); // getch(3x) nonblocking IO
+  keypad(win, TRUE);  // allow function keys
+  // intrflush(3x) - flush terminal input buffer on interrupt key
+  intrflush(win, FALSE);
+}
+
+/* Initialise ncurses for our usecase.
+ * WARNING: This function should only be called once.
+ */
+void init_ncurses(void) {
+  // ncurses expects a locale for consistent behaviour
+  setlocale(LC_ALL, CRS_LOCALE);
+
+  /* NCurses Init */
+  initscr();
+  /* WARNING: no you shouldn't delwin(stdscr) it breaks everything... */
+  __conf_window(stdscr);
+  start_color();
+
+  /* Screen Configuration */
+  termmode(TMODE_CBREAK);
+  noecho(); // manually echo from getch(3x)
+
+  curs_set(0); // hide cursor
+}
+
+/* Initialise (with default IO configuration) a new ncurses WINDOW.
+ */
+WINDOW *new_window(const int x, const int y, const int width,
+                   const int height) {
+  WINDOW *win = newwin(height, width, y, x);
+  __conf_window(win);
+
+  return win;
+}
+
+/* Initialise (with default IO configuration) the root ncurses WINDOW.
+ * NOTE: This is typically done via initscr(3x) and called "stdscr".
+ */
+WINDOW *root_window(void) {
+  WINDOW *rootwin = new_window(0, 0, COLS, LINES);
+  __conf_window(rootwin);
+  return rootwin;
+}
+
+/* Resize and move (if resized successfully) an ncurses WINDOW.
+ * Returns ERR (1) on fail, and OK (0) on success.
+ * NOTE: Failure occurs if width or height <= 0,
+ * NOTE: or if the x,y coordinate is outside the screen bounds.
+ */
+int resizemv_window(const int x, const int y, const int width, const int height,
+                    WINDOW *const win) {
+  return wresize(win, height, width) || mvwin(win, y, x);
+}