75 lines
1.9 KiB
C
75 lines
1.9 KiB
C
#include <stdlib.h>
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#include "_ncurses.h"
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#include "ncrswrap.h"
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#include "node.h"
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#include "tree.h"
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int ct_init(struct ct_tree **const tree) {
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/* Initialise NCurses Library & Root Node */
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init_ncurses();
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init_tree(tree);
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return EXIT_SUCCESS;
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}
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void ct_redraw(void) {
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/* TODO: hide doupdate() behind some other method */
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/* flush ncurses virtual screen -> physical screen */
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doupdate();
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}
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/* Recursively search the tree for update requests.
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* Returns:
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* 0 - success (no action required)
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* 1 - success (request: redraw the screen)
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*/
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static int __update_rec(struct ct_node *const node) {
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int result = 0;
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struct ct_dims *dims;
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if (node->flags & NFLAG_RESIZE) {
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/* TODO: the child has requested a resizing, but resize_node()
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* TODO: wastes CPU time resizing itself!
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*/
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dims = IS_ROOT_NODE(node) ? termdims() : dup_dims(node->surface->dims);
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resize_node(node, dims);
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result = 1;
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}
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if (node->surface->updatereq) {
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sfflush(node->surface);
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}
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for (int i = 0; i < node->cindex; i++) {
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result |= __update_rec(node->child[i]);
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}
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return result;
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}
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void ct_update(struct ct_tree *const tree) {
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const int key = wgetch(curscr);
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/* ncurses binds a SIGWINCH handler if SIGWINCH has SIG_DFL disposition
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* when initscr(3x) is called. This handler emits KEY_RESIZE (decimal 410) to
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* stdin. REF: manpages -> resizeterm(3x) initscr(3x) wgetch(3x)
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*/
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switch (key) {
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case -1:
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// wclear(tree->root->surface->win);
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// mvwprintw(tree->root->surface->win, 0, 0, " \r-1\n");
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// wrefresh(tree->root->surface->win);
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return;
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case KEY_RESIZE:
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tree->root->flags |= NFLAG_RESIZE;
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break;
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default:
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// wclear(tree->root->surface->win);
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// mvwprintw(tree->root->surface->win, 0, 0, " \r%d\n", key);
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// wrefresh(tree->root->surface->win);
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break;
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}
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if (__update_rec(tree->root)) {
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ct_redraw();
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}
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}
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