/* Scroll in 'direction' to the next line containing 're' in 'v',
* starting from the current line. Returns 0 if no occurrence is
* found.
*
* If consider_current is true then stay on the current line
* if it matches.
*/
int owl_viewwin_search(owl_viewwin *v, const owl_regex *re, int consider_current, int direction)
{
int start, end, offset;
int lineend, linestart;
const char *buf, *linestartp;
owl_fmtext_line_extents(&v->fmtext, v->topline, &start, &end);
if (direction == OWL_DIRECTION_DOWNWARDS) {
offset = owl_fmtext_search(&v->fmtext, re,
consider_current ? start : end);
if (offset < 0)
return 0;
v->topline = owl_fmtext_line_number(&v->fmtext, offset);
owl_viewwin_dirty(v);
return 1;
} else {
/* TODO: This is a hack. Really, we should have an owl_fmlines or
* something containing an array of owl_fmtext split into
* lines. Also, it cannot handle multi-line regex, if we ever care about
* them. */
buf = owl_fmtext_get_text(&v->fmtext);
lineend = consider_current ? end : start;
while (lineend > 0) {
linestartp = memrchr(buf, '\n', lineend - 1);
linestart = linestartp ? linestartp - buf + 1 : 0;
if (_re_memcompare(re, buf, linestart, lineend)) {
v->topline = owl_fmtext_line_number(&v->fmtext, linestart);
owl_viewwin_dirty(v);
return 1;
}
lineend = linestart;
}
return 0;
}
}
void owl_viewwin_bottom(owl_viewwin *v)
{
int winlines;
owl_window_get_position(v->content, &winlines, 0, 0, 0);
v->topline = v->textlines - winlines;
owl_viewwin_dirty(v);
}
void owl_viewwin_down(owl_viewwin *v, int amount) {
int winlines;
owl_window_get_position(v->content, &winlines, 0, 0, 0);
/* Don't scroll past the bottom. */
amount = MIN(amount, v->textlines - (v->topline + winlines));
/* But if we're already past the bottom, don't back up either. */
if (amount > 0) {
v->topline += amount;
owl_viewwin_dirty(v);
}
}
void owl_global_set_search_re(owl_global *g, const owl_regex *re) {
if (owl_regex_is_set(&g->search_re)) {
owl_regex_cleanup(&g->search_re);
owl_regex_init(&g->search_re);
}
if (re != NULL)
owl_regex_copy(re, &g->search_re);
/* TODO: Emit a signal so we don't depend on the viewwin and mainwin */
if (owl_global_get_viewwin(g))
owl_viewwin_dirty(owl_global_get_viewwin(g));
owl_mainwin_redisplay(owl_global_get_mainwin(g));
}
void owl_viewwin_top(owl_viewwin *v)
{
v->topline=0;
v->rightshift=0;
owl_viewwin_dirty(v);
}
void owl_viewwin_left(owl_viewwin *v, int n)
{
v->rightshift-=n;
if (v->rightshift<0) v->rightshift=0;
owl_viewwin_dirty(v);
}
void owl_viewwin_right(owl_viewwin *v, int n)
{
v->rightshift+=n;
owl_viewwin_dirty(v);
}
void owl_viewwin_up(owl_viewwin *v, int amount)
{
v->topline -= amount;
if (v->topline<0) v->topline=0;
owl_viewwin_dirty(v);
}
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));
owl_viewwin_dirty(v);
}
