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#include <string.h>
#include "owl.h"
#define BOTTOM_OFFSET 1
/* initialize the viewwin e. 'win' is an already initialzed curses
* window that will be used by viewwin
*/
void owl_viewwin_init_text(owl_viewwin *v, WINDOW *win, int winlines, int wincols, const char *text)
{
owl_fmtext_init_null(&(v->fmtext));
if (text) {
owl_fmtext_append_normal(&(v->fmtext), text);
if (text[0] != '\0' && text[strlen(text) - 1] != '\n') {
owl_fmtext_append_normal(&(v->fmtext), "\n");
}
v->textlines=owl_fmtext_num_lines(&(v->fmtext));
}
v->topline=0;
v->rightshift=0;
v->winlines=winlines;
v->wincols=wincols;
v->curswin=win;
v->onclose_hook = NULL;
}
void owl_viewwin_append_text(owl_viewwin *v, const char *text) {
owl_fmtext_append_normal(&(v->fmtext), text);
v->textlines=owl_fmtext_num_lines(&(v->fmtext));
}
/* initialize the viewwin e. 'win' is an already initialzed curses
* window that will be used by viewwin
*/
void owl_viewwin_init_fmtext(owl_viewwin *v, WINDOW *win, int winlines, int wincols, const owl_fmtext *fmtext)
{
char *text;
owl_fmtext_copy(&(v->fmtext), fmtext);
text = owl_fmtext_print_plain(fmtext);
if (text[0] != '\0' && text[strlen(text) - 1] != '\n') {
owl_fmtext_append_normal(&(v->fmtext), "\n");
}
owl_free(text);
v->textlines=owl_fmtext_num_lines(&(v->fmtext));
v->topline=0;
v->rightshift=0;
v->winlines=winlines;
v->wincols=wincols;
v->curswin=win;
}
void owl_viewwin_set_curswin(owl_viewwin *v, WINDOW *w, int winlines, int wincols)
{
v->curswin=w;
v->winlines=winlines;
v->wincols=wincols;
}
void owl_viewwin_set_onclose_hook(owl_viewwin *v, void (*onclose_hook) (owl_viewwin *vwin, void *data), void *onclose_hook_data) {
v->onclose_hook = onclose_hook;
v->onclose_hook_data = onclose_hook_data;
}
/* regenerate text on the curses window. */
void owl_viewwin_redisplay(owl_viewwin *v)
{
owl_fmtext fm1, fm2;
/* avoid segfault when screen too small to create curswin */
if (v->curswin == NULL)
return;
werase(v->curswin);
wmove(v->curswin, 0, 0);
owl_fmtext_init_null(&fm1);
owl_fmtext_init_null(&fm2);
owl_fmtext_truncate_lines(&(v->fmtext), v->topline, v->winlines-BOTTOM_OFFSET, &fm1);
owl_fmtext_truncate_cols(&fm1, v->rightshift, v->wincols-1+v->rightshift, &fm2);
owl_fmtext_curs_waddstr_without_search(&fm2, v->curswin);
/* print the message at the bottom */
wmove(v->curswin, v->winlines-1, 0);
wattrset(v->curswin, A_REVERSE);
if (v->textlines - v->topline > v->winlines-BOTTOM_OFFSET) {
waddstr(v->curswin, "--More-- (Space to see more, 'q' to quit)");
} else {
waddstr(v->curswin, "--End-- (Press 'q' to quit)");
}
wattroff(v->curswin, A_REVERSE);
owl_fmtext_cleanup(&fm1);
owl_fmtext_cleanup(&fm2);
}
void owl_viewwin_pagedown(owl_viewwin *v)
{
v->topline+=v->winlines - BOTTOM_OFFSET;
if ( (v->topline+v->winlines-BOTTOM_OFFSET) > v->textlines) {
v->topline = v->textlines - v->winlines + BOTTOM_OFFSET;
}
}
void owl_viewwin_linedown(owl_viewwin *v)
{
v->topline++;
if ( (v->topline+v->winlines-BOTTOM_OFFSET) > v->textlines) {
v->topline = v->textlines - v->winlines + BOTTOM_OFFSET;
}
}
void owl_viewwin_pageup(owl_viewwin *v)
{
v->topline-=v->winlines;
if (v->topline<0) v->topline=0;
}
void owl_viewwin_lineup(owl_viewwin *v)
{
v->topline--;
if (v->topline<0) v->topline=0;
}
void owl_viewwin_right(owl_viewwin *v, int n)
{
v->rightshift+=n;
}
void owl_viewwin_left(owl_viewwin *v, int n)
{
v->rightshift-=n;
if (v->rightshift<0) v->rightshift=0;
}
void owl_viewwin_top(owl_viewwin *v)
{
v->topline=0;
v->rightshift=0;
}
void owl_viewwin_bottom(owl_viewwin *v)
{
v->topline = v->textlines - v->winlines + BOTTOM_OFFSET;
}
void owl_viewwin_cleanup(owl_viewwin *v)
{
if (v->onclose_hook) {
v->onclose_hook(v, v->onclose_hook_data);
v->onclose_hook = NULL;
v->onclose_hook_data = NULL;
}
owl_fmtext_cleanup(&(v->fmtext));
}