jobject djvu_links_get_links(JNIEnv *jenv, ddjvu_document_t* djvu_document, int page)
{
DEBUG("djvu_links_get_links %d", page);
miniexp_t page_annotations = miniexp_nil;
miniexp_t *hyperlinks = NULL, *iter = NULL;
ddjvu_pageinfo_t page_info;
jobject arrayList = NULL;
page_annotations = ddjvu_document_get_pageanno(djvu_document, page);
ddjvu_document_get_pageinfo(djvu_document, page, &page_info);
if (page_annotations)
{
hyperlinks = ddjvu_anno_get_hyperlinks(page_annotations);
if (hyperlinks)
{
jclass arrayListClass = jenv->FindClass("java/util/ArrayList");
if (!arrayListClass)
return arrayList;
jmethodID alInitMethodId = jenv->GetMethodID(arrayListClass, "<init>", "()V");
if (!alInitMethodId)
return arrayList;
jmethodID alAddMethodId = jenv->GetMethodID(arrayListClass, "add", "(Ljava/lang/Object;)Z");
if (!alAddMethodId)
return arrayList;
arrayList = jenv->NewObject(arrayListClass, alInitMethodId);
if (!arrayList)
return arrayList;
for (iter = hyperlinks; *iter; ++iter)
{
jobject hl = get_djvu_hyperlink_mapping(jenv, djvu_document, &page_info, *iter);
if (hl)
jenv->CallBooleanMethod(arrayList, alAddMethodId, hl);
//jenv->DeleteLocalRef(hl);
}
free(hyperlinks);
}
ddjvu_miniexp_release(djvu_document, page_annotations);
}
return arrayList;
}
EvMappingList *
djvu_links_get_links (EvDocumentLinks *document_links,
gint page,
double scale_factor)
{
DjvuDocument *djvu_document = DJVU_DOCUMENT (document_links);
GList *retval = NULL;
miniexp_t page_annotations = miniexp_nil;
miniexp_t *hyperlinks = NULL, *iter = NULL;
EvMapping *ev_link_mapping;
ddjvu_pageinfo_t page_info;
while ((page_annotations = ddjvu_document_get_pageanno (djvu_document->d_document, page)) == miniexp_dummy)
djvu_handle_events (djvu_document, TRUE, NULL);
while (ddjvu_document_get_pageinfo (djvu_document->d_document, page, &page_info) < DDJVU_JOB_OK)
djvu_handle_events(djvu_document, TRUE, NULL);
if (page_annotations) {
hyperlinks = ddjvu_anno_get_hyperlinks (page_annotations);
if (hyperlinks) {
for (iter = hyperlinks; *iter; ++iter) {
ev_link_mapping = get_djvu_hyperlink_mapping (djvu_document, page, &page_info, *iter);
if (ev_link_mapping) {
ev_link_mapping->area.x1 *= scale_factor;
ev_link_mapping->area.x2 *= scale_factor;
ev_link_mapping->area.y1 *= scale_factor;
ev_link_mapping->area.y2 *= scale_factor;
retval = g_list_prepend (retval, ev_link_mapping);
}
}
free (hyperlinks);
}
ddjvu_miniexp_release (djvu_document->d_document, page_annotations);
}
return ev_mapping_list_new (page, retval, (GDestroyNotify)g_object_unref);
}
QList< Model::Link* > Model::DjVuPage::links() const
{
QMutexLocker mutexLocker(&m_parent->m_mutex);
QList< Link* > links;
miniexp_t pageAnnoExp;
while(true)
{
pageAnnoExp = ddjvu_document_get_pageanno(m_parent->m_document, m_index);
if(pageAnnoExp == miniexp_dummy)
{
clearMessageQueue(m_parent->m_context, true);
}
else
{
break;
}
}
const int pageAnnoLength = miniexp_length(pageAnnoExp);
for(int pageAnnoN = 0; pageAnnoN < pageAnnoLength; ++pageAnnoN)
{
miniexp_t linkExp = miniexp_nth(pageAnnoN, pageAnnoExp);
if(miniexp_length(linkExp) <= 3 || qstrncmp(miniexp_to_name(miniexp_nth(0, linkExp)), "maparea", 7 ) != 0 || !miniexp_symbolp(miniexp_nth(0, miniexp_nth(3, linkExp))))
{
continue;
}
const QString type = QString::fromUtf8(miniexp_to_name(miniexp_nth(0, miniexp_nth(3, linkExp))));
if(type == QLatin1String("rect") || type == QLatin1String("oval") || type == QLatin1String("poly"))
{
// boundary
QPainterPath boundary;
miniexp_t areaExp = miniexp_nth(3, linkExp);
const int areaLength = miniexp_length( areaExp );
if(areaLength == 5 && (type == QLatin1String("rect") || type == QLatin1String("oval")))
{
QPoint p(miniexp_to_int(miniexp_nth(1, areaExp)), miniexp_to_int(miniexp_nth(2, areaExp)));
QSize s(miniexp_to_int(miniexp_nth(3, areaExp)), miniexp_to_int(miniexp_nth(4, areaExp)));
p.setY(m_size.height() - s.height() - p.y());
const QRectF r(p, s);
if(type == QLatin1String("rect"))
{
boundary.addRect(r);
}
else
{
boundary.addEllipse(r);
}
}
else if(areaLength > 0 && areaLength % 2 == 1 && type == QLatin1String("poly"))
{
QPolygon polygon;
for(int areaExpN = 1; areaExpN < areaLength; areaExpN += 2)
{
QPoint p(miniexp_to_int(miniexp_nth(areaExpN, areaExp)), miniexp_to_int(miniexp_nth(areaExpN + 1, areaExp)));
p.setY(m_size.height() - p.y());
polygon << p;
}
boundary.addPolygon(polygon);
}
if(boundary.isEmpty())
{
continue;
}
boundary = QTransform::fromScale(1.0 / m_size.width(), 1.0 / m_size.height()).map(boundary);
// target
QString target;
miniexp_t targetExp = miniexp_nth(1, linkExp);
if(miniexp_stringp(targetExp))
{
target = QString::fromUtf8(miniexp_to_str(miniexp_nth(1, linkExp)));
}
else if(miniexp_length(targetExp) == 3 && qstrncmp(miniexp_to_name(miniexp_nth(0, targetExp)), "url", 3) == 0)
{
target = QString::fromUtf8(miniexp_to_str(miniexp_nth(1, targetExp)));
}
if(target.isEmpty())
{
continue;
}
if(target.at(0) == QLatin1Char('#'))
{
target.remove(0, 1);
bool ok = false;
int targetPage = target.toInt(&ok);
if(!ok)
{
if(m_parent->m_indexByName.contains(target))
{
targetPage = m_parent->m_indexByName[target] + 1;
}
else
{
continue;
}
}
else
{
targetPage = (target.at(0) == QLatin1Char('+') || target.at(0) == QLatin1Char('-')) ? m_index + targetPage : targetPage;
}
links.append(new Link(boundary, targetPage));
}
else
{
links.append(new Link(boundary, target));
}
}
}
ddjvu_miniexp_release(m_parent->m_document, pageAnnoExp);
return links;
}
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;
}
