girara_tree_node_t*
cb_document_index_generate(zathura_document_t* document,
cb_document_t* cb_document, zathura_error_t* error)
{
if (document == NULL || cb_document == NULL) {
if (error != NULL) {
*error = ZATHURA_ERROR_INVALID_ARGUMENTS;
}
return NULL;
}
girara_tree_node_t* root = girara_node_new(zathura_index_element_new("ROOT"));
unsigned int page_number = 0;
GIRARA_LIST_FOREACH(cb_document->pages, cb_document_page_meta_t*, iter, page)
{
gchar* markup = g_markup_escape_text(page->file, -1);
zathura_index_element_t* index_element = zathura_index_element_new(markup);
g_free(markup);
if (index_element != NULL) {
zathura_rectangle_t rect = { 0, 0, 0, 0 };
zathura_link_target_t target = { ZATHURA_LINK_DESTINATION_XYZ, NULL,
page_number, -1, -1, -1, -1, 0 };
index_element->link = zathura_link_new(ZATHURA_LINK_GOTO_DEST, rect,
target);
girara_node_append_data(root, index_element);
}
++page_number;
}
GIRARA_LIST_FOREACH_END(cb_document->pages, cb_document_page_meta_t*, iter, page);
return root;
}
static void
build_index(fz_context* ctx, fz_document* document, fz_outline* outline, girara_tree_node_t* root)
{
if (outline == NULL || root == NULL) {
return;
}
while (outline != NULL) {
zathura_index_element_t* index_element = zathura_index_element_new(outline->title);
zathura_link_target_t target = { ZATHURA_LINK_DESTINATION_UNKNOWN, NULL, 0, -1, -1, -1, -1, 0 };
zathura_link_type_t type = ZATHURA_LINK_INVALID;
zathura_rectangle_t rect = { .x1 = 0, .y1 = 0, .x2 = 0, .y2 = 0 };
if (outline->uri == NULL) {
type = ZATHURA_LINK_NONE;
} else if (fz_is_external_link(ctx, outline->uri) == 1) {
if (strstr(outline->uri, "file://") == outline->uri) {
type = ZATHURA_LINK_GOTO_REMOTE;
target.value = outline->uri;
} else {
type = ZATHURA_LINK_URI;
target.value = outline->uri;
}
} else {
float x = 0;
float y = 0;
type = ZATHURA_LINK_GOTO_DEST;
target.destination_type = ZATHURA_LINK_DESTINATION_XYZ;
target.page_number = fz_resolve_link(ctx, document, outline->uri, &x, &y);
target.left = x;
target.top = y;
target.zoom = 0.0;
}
index_element->link = zathura_link_new(type, rect, target);
if (index_element->link == NULL) {
outline = outline->next;
continue;
}
girara_tree_node_t* node = girara_node_append_data(root, index_element);
if (outline->down != NULL) {
build_index(ctx, document, outline->down, node);
}
outline = outline->next;
}
}
static void
build_index(djvu_document_t *djvu_document, miniexp_t expression, girara_tree_node_t* root)
{
if (expression == miniexp_nil || root == NULL) {
return;
}
int fileno = ddjvu_document_get_filenum(djvu_document->document);
int curfile = 0;
while (miniexp_consp(expression) != 0) {
miniexp_t inner = miniexp_car(expression);
if (miniexp_consp(inner)
&& miniexp_consp(miniexp_cdr(inner))
&& miniexp_stringp(miniexp_car(inner))
&& miniexp_stringp(miniexp_car(inner))
) {
const char* name = miniexp_to_str(miniexp_car(inner));
const char* link = miniexp_to_str(miniexp_cadr(inner));
/* TODO: handle other links? */
if (link == NULL || link[0] != '#') {
expression = miniexp_cdr(expression);
continue;
}
zathura_link_type_t type = ZATHURA_LINK_GOTO_DEST;
zathura_rectangle_t rect;
zathura_link_target_t target = { 0 };
target.destination_type = ZATHURA_LINK_DESTINATION_XYZ;
/* Check if link+1 contains a number */
bool number = true;
const size_t linklen = strlen(link);
for (unsigned int k = 1; k < linklen; k++) {
if (!isdigit(link[k])) {
number = false;
break;
}
}
/* if link starts with a number assume it is a number */
if (number == true) {
target.page_number = atoi(link + 1) - 1;
} else {
/* otherwise assume it is an id for a page */
ddjvu_fileinfo_t info;
int f, i;
for (i=0; i < fileno; i++) {
f = (curfile + i) % fileno;
ddjvu_document_get_fileinfo(djvu_document->document, f, &info);
if (info.id != NULL && !strcmp(link+1, info.id)) {
break;
}
}
/* got a page */
if (i < fileno && info.pageno >= 0) {
curfile = (f+1) % fileno;
target.page_number = info.pageno;
} else {
/* give up */
expression = miniexp_cdr(expression);
continue;
}
}
zathura_index_element_t* index_element = zathura_index_element_new(name);
if (index_element == NULL) {
continue;
}
index_element->link = zathura_link_new(type, rect, target);
if (index_element->link == NULL) {
zathura_index_element_free(index_element);
continue;
}
girara_tree_node_t* node = girara_node_append_data(root, index_element);
/* search recursive */
build_index(djvu_document, miniexp_cddr(inner), node);
}
expression = miniexp_cdr(expression);
}
}
girara_list_t*
djvu_page_links_get(zathura_page_t* page, void* UNUSED(data), zathura_error_t* error)
{
if (page == NULL) {
if (error != NULL) {
*error = ZATHURA_ERROR_INVALID_ARGUMENTS;
}
goto error_ret;
}
zathura_document_t* document = zathura_page_get_document(page);
if (document == NULL) {
goto error_ret;
}
girara_list_t* list = girara_list_new2((girara_free_function_t) zathura_link_free);
if (list == NULL) {
if (error != NULL) {
*error = ZATHURA_ERROR_OUT_OF_MEMORY;
}
goto error_ret;
}
djvu_document_t* djvu_document = zathura_document_get_data(document);
miniexp_t annotations = miniexp_nil;
while ((annotations = ddjvu_document_get_pageanno(djvu_document->document,
zathura_page_get_index(page))) == miniexp_dummy) {
handle_messages(djvu_document, true);
}
if (annotations == miniexp_nil) {
goto error_free;
}
miniexp_t* hyperlinks = ddjvu_anno_get_hyperlinks(annotations);
for (miniexp_t* iter = hyperlinks; *iter != NULL; iter++) {
if (miniexp_car(*iter) != miniexp_symbol("maparea")) {
continue;
}
miniexp_t inner = miniexp_cdr(*iter);
/* extract url information */
const char* target_string = NULL;
if (miniexp_caar(inner) == miniexp_symbol("url")) {
if (exp_to_str(miniexp_caddr(miniexp_car(inner)), &target_string) == false) {
continue;
}
} else {
if (exp_to_str(miniexp_car(inner), &target_string) == false) {
continue;
}
}
/* skip comment */
inner = miniexp_cdr(inner);
/* extract link area */
inner = miniexp_cdr(inner);
zathura_rectangle_t rect = { 0, 0, 0, 0 };
if (exp_to_rect(miniexp_car(inner), &rect) == false) {
continue;
}
/* update rect */
unsigned int page_height = zathura_page_get_height(page) / ZATHURA_DJVU_SCALE;
rect.x1 = rect.x1 * ZATHURA_DJVU_SCALE;
rect.x2 = rect.x2 * ZATHURA_DJVU_SCALE;
double tmp = rect.y1;
rect.y1 = (page_height - rect.y2) * ZATHURA_DJVU_SCALE;
rect.y2 = (page_height - tmp) * ZATHURA_DJVU_SCALE;
/* create zathura link */
zathura_link_type_t type = ZATHURA_LINK_INVALID;
zathura_link_target_t target = { ZATHURA_LINK_DESTINATION_UNKNOWN, NULL, 0, -1, -1, -1, -1, 0 };;
/* goto page */
if (target_string[0] == '#' && target_string[1] == 'p') {
type = ZATHURA_LINK_GOTO_DEST;
target.page_number = atoi(target_string + 2) - 1;
/* url or other? */
} else if (strstr(target_string, "//") != NULL) {
type = ZATHURA_LINK_URI;
target.value = (char*) target_string;
/* TODO: Parse all different links */
} else {
continue;
}
zathura_link_t* link = zathura_link_new(type, rect, target);
if (link != NULL) {
girara_list_append(list, link);
}
}
return list;
error_free:
if (list != NULL) {
girara_list_free(list);
}
error_ret:
return NULL;
}
