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/* Copyright 2007, 2008 Peter Klausler. See COPYING for license. */
#include "all.h"
ssize_t view_vprintf(struct view *view, const char *msg, va_list ap)
{
char buff[1024];
vsnprintf(buff, sizeof buff, msg, ap);
return view_insert(view, buff, view->bytes, -1);
}
ssize_t view_printf(struct view *view, const char *msg, ...)
{
va_list ap;
int result;
va_start(ap, msg);
result = view_vprintf(view, msg, ap);
va_end(ap);
return result;
}
size_t view_get_selection(struct view *view, position_t *offset,
Boolean_t *append)
{
position_t cursor = locus_get(view, CURSOR);
position_t mark = locus_get(view, MARK);
if (mark == UNSET)
mark = cursor + (cursor < view->bytes);
if (append)
*append = cursor >= mark;
if (mark <= cursor)
return cursor - (*offset = mark);
return mark - (*offset = cursor);
}
char *view_extract(struct view *view, position_t offset, unsigned bytes)
{
char *str;
if (!view)
return NULL;
if (offset > view->bytes)
return NULL;
if (offset + bytes > view->bytes)
bytes = view->bytes - offset;
if (!bytes)
return NULL;
str = allocate(bytes+1);
str[view_get(view, str, offset, bytes)] = '\0';
return str;
}
char *view_extract_selection(struct view *view)
{
position_t offset;
size_t bytes = view_get_selection(view, &offset, NULL);
return view_extract(view, offset, bytes);
}
size_t view_delete_selection(struct view *view)
{
position_t offset;
size_t bytes = view_get_selection(view, &offset, NULL);
view_delete(view, offset, bytes);
locus_set(view, MARK, UNSET);
return bytes;
}
struct view *view_next(struct view *view)
{
struct view *new = view;
do {
if (new->next)
new = new->next;
else if (new->text->next)
new = new->text->next->views;
else
new = text_list->views;
} while (new != view && new->window);
return new == view ? text_new() : new;
}
Unicode_t view_unicode(struct view *view, position_t offset, position_t *next)
{
Unicode_t ch = view_byte(view, offset);
char *raw;
size_t length;
if (!IS_UNICODE(ch) ||
ch < 0x80 ||
view->text->flags & TEXT_NO_UTF8) {
if (ch == '\r' &&
view->text->flags & TEXT_CRNL &&
view_byte(view, offset + 1) == '\n') {
if (next)
*next = offset + 2;
return '\n';
}
if (next)
*next = offset + IS_UNICODE(ch);
return ch;
}
length = view_raw(view, &raw, offset, 8);
length = utf8_length(raw, length);
if (next)
*next = offset + length;
return utf8_unicode(raw, length);
}
Unicode_t view_unicode_prior(struct view *view, position_t offset,
position_t *prev)
{
Unicode_t ch = UNICODE_BAD;
char *raw;
if (offset) {
ch = view_byte(view, --offset);
if (IS_UNICODE(ch) &&
ch >= 0x80 &&
!(view->text->flags & TEXT_NO_UTF8)) {
unsigned at = offset >= 7 ? offset-7 : 0;
view_raw(view, &raw, at, offset-at+1);
offset -= utf8_length_backwards(raw+offset-at,
offset-at+1) - 1;
ch = view_unicode(view, offset, NULL);
} else if (ch == '\n' &&
view->text->flags & TEXT_CRNL &&
offset &&
view_byte(view, offset-1) == '\r')
offset--;
}
if (prev)
*prev = offset;
return ch;
}
Unicode_t view_char(struct view *view, position_t offset, position_t *next)
{
position_t next0;
Unicode_t ch = view_unicode(view, offset, &next0);
if (!next)
return ch;
*next = next0;
if (IS_FOLDED(ch)) {
size_t fbytes = FOLDED_BYTES(ch);
position_t next2;
if (view_unicode(view, next0 + fbytes, &next2) ==
FOLD_END + fbytes)
*next = next2;
}
return ch;
}
Unicode_t view_char_prior(struct view *view, position_t offset,
position_t *prev)
{
Unicode_t ch = view_unicode_prior(view, offset, &offset), ch0;
size_t fbytes;
position_t offset0;
if (ch >= FOLD_END &&
(fbytes = FOLDED_BYTES(ch)) <= offset &&
IS_FOLDED(ch0 = view_unicode_prior(view, offset - fbytes,
&offset0)) &&
FOLDED_BYTES(ch0) == fbytes) {
ch = ch0;
offset = offset0;
}
if (prev)
*prev = offset;
return ch;
}
Boolean_t is_open_bracket(const char *brackets, Unicode_t ch)
{
if (ch >= 0x80)
return FALSE;
for (; *brackets; brackets += 2)
if (*brackets == ch)
return TRUE;
return FALSE;
}
Boolean_t is_close_bracket(const char *brackets, Unicode_t ch)
{
if (ch >= 0x80)
return FALSE;
for (brackets++; *brackets; brackets += 2)
if (*brackets == ch)
return TRUE;
return FALSE;
}
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