/**
* djvu_text_page_selection:
* @page: #DjvuTextPage instance
* @p: tree to append
* @delimit: character/word/... delimiter
*
* Walks the tree in @p and appends the text with
* djvu_text_page_selection_process() for all s-expressions
* between the start and end fields.
*
* Returns: whether the end was not reached in this subtree
*/
static gboolean
djvu_text_page_selection (DjvuTextPage *page,
miniexp_t p,
int delimit)
{
g_return_val_if_fail (miniexp_consp (p) && miniexp_symbolp
(miniexp_car (p)), FALSE);
if (miniexp_car (p) != page->char_symbol)
delimit |= miniexp_car (p) == page->word_symbol ? 1 : 2;
miniexp_t deeper = miniexp_cddr (miniexp_cdddr (p));
while (deeper != miniexp_nil) {
miniexp_t str = miniexp_car (deeper);
if (miniexp_stringp (str)) {
if (!djvu_text_page_selection_process
(page, p, delimit))
return FALSE;
} else {
if (!djvu_text_page_selection
(page, str, delimit))
return FALSE;
}
delimit = 0;
deeper = miniexp_cdr (deeper);
}
return TRUE;
}
/**
* djvu_text_page_sexpr:
* @page: #DjvuTextPage instance
* @p: tree to append
* @start: first s-expression in the selection
* @end: last s-expression in the selection
*
* Walks the tree in @p and extends the rectangle with
* djvu_text_page_process() for all s-expressions between @start and @end.
*
* Returns: whether the end was not reached in this subtree
*/
static gboolean
djvu_text_page_sexpr (DjvuTextPage *page,
miniexp_t p,
miniexp_t start,
miniexp_t end)
{
g_return_val_if_fail (miniexp_consp (p) && miniexp_symbolp
(miniexp_car (p)), FALSE);
miniexp_t deeper = miniexp_cddr (miniexp_cdddr (p));
while (deeper != miniexp_nil) {
miniexp_t str = miniexp_car (deeper);
if (miniexp_stringp (str)) {
if (!djvu_text_page_sexpr_process
(page, p, start, end))
return FALSE;
} else {
if (!djvu_text_page_sexpr
(page, str, start, end))
return FALSE;
}
deeper = miniexp_cdr (deeper);
}
return TRUE;
}
/**
* djvu_text_page_append_search:
* @page: #DjvuTextPage instance
* @p: tree to append
* @case_sensitive: do not ignore case
* @delimit: insert spaces because of higher (sentence/paragraph/...) break
*
* Appends the tree in @p to the internal text string.
*/
static void
djvu_text_page_append_text (DjvuTextPage *page,
miniexp_t p,
gboolean case_sensitive,
gboolean delimit)
{
char *token_text;
miniexp_t deeper;
g_return_if_fail (miniexp_consp (p) &&
miniexp_symbolp (miniexp_car (p)));
delimit |= page->char_symbol != miniexp_car (p);
deeper = miniexp_cddr (miniexp_cdddr (p));
while (deeper != miniexp_nil) {
miniexp_t data = miniexp_car (deeper);
if (miniexp_stringp (data)) {
DjvuTextLink link;
link.position = page->text == NULL ? 0 :
strlen (page->text);
link.pair = p;
g_array_append_val (page->links, link);
token_text = (char *) miniexp_to_str (data);
if (!case_sensitive)
token_text = g_utf8_casefold (token_text, -1);
if (page->text == NULL)
page->text = g_strdup (token_text);
else {
char *new_text =
g_strjoin (delimit ? " " : NULL,
page->text, token_text,
NULL);
g_free (page->text);
page->text = new_text;
}
if (!case_sensitive)
g_free (token_text);
} else
djvu_text_page_append_text (page, data,
case_sensitive, delimit);
delimit = FALSE;
deeper = miniexp_cdr (deeper);
}
}
static void
djvu_text_page_limits (DjvuTextPage *page,
miniexp_t p,
EvRectangle *rect)
{
g_return_if_fail (miniexp_consp (p) &&
miniexp_symbolp (miniexp_car (p)));
miniexp_t deeper = miniexp_cddr (miniexp_cdddr (p));
while (deeper != miniexp_nil) {
miniexp_t str = miniexp_car (deeper);
if (miniexp_stringp (str))
djvu_text_page_limits_process (page, p, rect);
else
djvu_text_page_limits (page, str, rect);
deeper = miniexp_cdr (deeper);
}
}