//sumatrapdf code
int extractText(miniexp_t item, Arraylist list, fz_bbox * target) {
miniexp_t type = miniexp_car(item);
if (!miniexp_symbolp(type))
return 0;
item = miniexp_cdr(item);
if (!miniexp_numberp(miniexp_car(item))) return 0;
int x0 = miniexp_to_int(miniexp_car(item)); item = miniexp_cdr(item);
if (!miniexp_numberp(miniexp_car(item))) return 0;
int y0 = miniexp_to_int(miniexp_car(item)); item = miniexp_cdr(item);
if (!miniexp_numberp(miniexp_car(item))) return 0;
int x1 = miniexp_to_int(miniexp_car(item)); item = miniexp_cdr(item);
if (!miniexp_numberp(miniexp_car(item))) return 0;
int y1 = miniexp_to_int(miniexp_car(item)); item = miniexp_cdr(item);
//RectI rect = RectI::FromXY(x0, y0, x1, y1);
fz_bbox rect = {x0 , y0 , x1 , y1};
miniexp_t str = miniexp_car(item);
if (miniexp_stringp(str) && !miniexp_cdr(item)) {
fz_bbox inters = fz_intersect_bbox(rect, *target);
//LOGI("Start text extraction: rectangle=[%d,%d,%d,%d] %s", rect.x0, rect.y0, rect.x1, rect.y1, content);
if (!fz_is_empty_bbox(inters)) {
const char *content = miniexp_to_str(str);
while (*content) {
arraylist_add(list, *content++);
}
// if (value) {
// size_t len = str::Len(value);
// // TODO: split the rectangle into individual parts per glyph
// for (size_t i = 0; i < len; i++)
// coords.Append(RectI(rect.x, rect.y, rect.dx, rect.dy));
// extracted.AppendAndFree(value);
// }
if (miniexp_symbol("word") == type) {
arraylist_add(list, ' ');
//coords.Append(RectI(rect.x + rect.dx, rect.y, 2, rect.dy));
}
else if (miniexp_symbol("char") != type) {
arraylist_add(list, '\n');
// extracted.Append(lineSep);
// for (size_t i = 0; i < str::Len(lineSep); i++)
// coords.Append(RectI());
}
}
item = miniexp_cdr(item);
}
while (miniexp_consp(str)) {
extractText(str, list, target);
item = miniexp_cdr(item);
str = miniexp_car(item);
}
return !item;
}
jint* get_djvu_hyperlink_area(ddjvu_pageinfo_t *page_info, miniexp_t sexp, int &type, int &len)
{
miniexp_t iter;
iter = sexp;
DEBUG("Hyperlink area %s", miniexp_to_name(miniexp_car(sexp)));
if (miniexp_car(iter) == miniexp_symbol("rect"))
type = 1;
else if (miniexp_car(iter) == miniexp_symbol("oval"))
type = 2;
else if (miniexp_car(iter) == miniexp_symbol("poly"))
type = 3;
else return NULL;
len = miniexp_length(iter);
jint* array = new jint[len];
int x, i = 0;
iter = miniexp_cdr(iter);
while (iter != miniexp_nil)
{
if (!number_from_miniexp(miniexp_car(iter), &x))
break;
iter = miniexp_cdr(iter);
array[i++] = (jint) x;
if (i >= len)
break;
}
len = i;
if ((type == 1 || type == 2) && len == 4)
{
int miny, width, height;
miny = array[1];
width = array[2];
height = array[3];
array[1] = (page_info->height - (miny + height));
array[2] = array[0] + width;
array[3] = (page_info->height - miny);
}
if (type == 3 && (len % 2) == 0)
{
int ccc;
for (int k = 1; k < len; k += 2)
{
ccc = array[k];
array[k] = (page_info->height - ccc);
}
}
return array;
}
/**
* djvu_text_page_new:
* @text: S-expression of the page text
*
* Creates a new page to search.
*
* Returns: new #DjvuTextPage instance
*/
DjvuTextPage *
djvu_text_page_new (miniexp_t text)
{
DjvuTextPage *page;
page = g_new0 (DjvuTextPage, 1);
page->links = g_array_new (FALSE, FALSE, sizeof (DjvuTextLink));
page->char_symbol = miniexp_symbol ("char");
page->word_symbol = miniexp_symbol ("word");
page->text_structure = text;
return page;
}
static EvMapping *
get_djvu_hyperlink_mapping (DjvuDocument *djvu_document,
int page,
ddjvu_pageinfo_t *page_info,
miniexp_t sexp)
{
EvMapping *ev_link_mapping = NULL;
EvLinkAction *ev_action = NULL;
miniexp_t iter;
const char *url, *url_target, *comment;
ev_link_mapping = g_new (EvMapping, 1);
iter = sexp;
if (miniexp_car (iter) != miniexp_symbol ("maparea")) goto unknown_mapping;
iter = miniexp_cdr(iter);
if (miniexp_caar(iter) == miniexp_symbol("url")) {
if (!string_from_miniexp (miniexp_cadr (miniexp_car (iter)), &url)) goto unknown_mapping;
if (!string_from_miniexp (miniexp_caddr (miniexp_car (iter)), &url_target)) goto unknown_mapping;
} else {
if (!string_from_miniexp (miniexp_car(iter), &url)) goto unknown_mapping;
url_target = NULL;
}
iter = miniexp_cdr (iter);
if (!string_from_miniexp (miniexp_car(iter), &comment)) goto unknown_mapping;
iter = miniexp_cdr (iter);
if (!get_djvu_hyperlink_area (page_info, miniexp_car(iter), ev_link_mapping)) goto unknown_mapping;
iter = miniexp_cdr (iter);
/* FIXME: DjVu hyperlink attributes are ignored */
ev_action = get_djvu_link_action (djvu_document, url, page);
if (!ev_action) goto unknown_mapping;
ev_link_mapping->data = ev_link_new (comment, ev_action);
g_object_unref (ev_action);
return ev_link_mapping;
unknown_mapping:
if (ev_link_mapping) g_free(ev_link_mapping);
g_warning("DjvuLibre error: Unknown hyperlink %s", miniexp_to_name(miniexp_car(sexp)));
return NULL;
}
girara_tree_node_t*
djvu_document_index_generate(zathura_document_t* document, djvu_document_t*
djvu_document, zathura_error_t* error)
{
if (document == NULL || djvu_document == NULL) {
if (error != NULL) {
*error = ZATHURA_ERROR_INVALID_ARGUMENTS;
}
return NULL;
}
miniexp_t outline = miniexp_dummy;
while ((outline = ddjvu_document_get_outline(djvu_document->document)) ==
miniexp_dummy) {
handle_messages(djvu_document, true);
}
if (outline == miniexp_dummy) {
return NULL;
}
if (miniexp_consp(outline) == 0 || miniexp_car(outline) != miniexp_symbol("bookmarks")) {
ddjvu_miniexp_release(djvu_document->document, outline);
return NULL;
}
girara_tree_node_t* root = girara_node_new(zathura_index_element_new("ROOT"));
build_index(djvu_document, miniexp_cdr(outline), root);
ddjvu_miniexp_release(djvu_document->document, outline);
return root;
}
void
QDjViewOutline::refresh()
{
QDjVuDocument *doc = djview->getDocument();
if (doc && !loaded && djview->pageNum()>0)
{
miniexp_t outline = doc->getDocumentOutline();
if (outline == miniexp_dummy)
return;
loaded = true;
if (outline)
{
if (!miniexp_consp(outline) ||
miniexp_car(outline) != miniexp_symbol("bookmarks"))
{
QString msg = tr("Outline data is corrupted");
qWarning("%s", (const char*)msg.toLocal8Bit());
}
tree->clear();
QTreeWidgetItem *root = new QTreeWidgetItem();
fillItems(root, miniexp_cdr(outline));
while (root->childCount() > 0)
tree->insertTopLevelItem(tree->topLevelItemCount(),
root->takeChild(0) );
if (tree->topLevelItemCount() == 1)
tree->topLevelItem(0)->setExpanded(true);
delete root;
}
else
{
tree->clear();
QTreeWidgetItem *root = new QTreeWidgetItem(tree);
root->setText(0, tr("Pages"));
root->setFlags(Qt::ItemIsEnabled);
root->setData(0, Qt::UserRole, -1);
for (int pageno=0; pageno<djview->pageNum(); pageno++)
{
QTreeWidgetItem *item = new QTreeWidgetItem(root);
QString name = djview->pageName(pageno);
item->setText(0, tr("Page %1").arg(name));
item->setData(0, Qt::UserRole, pageno);
item->setData(0, Qt::UserRole+1, pageno);
item->setFlags(Qt::ItemIsSelectable|Qt::ItemIsEnabled);
item->setToolTip(0, tr("Go: page %1.").arg(name));
item->setWhatsThis(0, whatsThis());
}
tree->setItemExpanded(root, true);
}
pageChanged(djview->getDjVuWidget()->page());
}
}
//Outline
extern "C" jlong Java_org_ebookdroid_droids_djvu_codec_DjvuOutline_open(JNIEnv *env, jclass cls, jlong docHandle)
{
// DEBUG("DjvuOutline.open(%p)",docHandle);
miniexp_t outline = ddjvu_document_get_outline((ddjvu_document_t*) docHandle);
if (outline && outline != miniexp_dummy)
{
if (!miniexp_consp(outline) || miniexp_car(outline) != miniexp_symbol("bookmarks"))
{
ERROR("%s", "Outline data is corrupted");
return 0;
}
else return (jlong) outline;
// debug_outline(outline);
}
return 0;
}
static int
parse_text_type(miniexp_t exp)
{
static const char *names[] = {
"char", "word", "line", "para", "region", "column", "page"
};
static int const nsymbs = 7;
static miniexp_t symbs[7];
if (!symbs[0]) {
int i;
for (i=0; i<nsymbs; i++)
symbs[i] = miniexp_symbol(names[i]);
}
int i;
for (i=0; i<nsymbs; i++)
if (exp == symbs[i])
return i;
return -1;
}
static gboolean
get_djvu_hyperlink_area (ddjvu_pageinfo_t *page_info,
miniexp_t sexp,
EvMapping *ev_link_mapping)
{
miniexp_t iter;
iter = sexp;
if ((miniexp_car (iter) == miniexp_symbol ("rect") || miniexp_car (iter) == miniexp_symbol ("oval"))
&& miniexp_length (iter) == 5) {
/* FIXME: get bounding box for (oval) since Evince doesn't support shaped links */
int minx, miny, width, height;
iter = miniexp_cdr (iter);
if (!number_from_miniexp (miniexp_car (iter), &minx)) goto unknown_link;
iter = miniexp_cdr (iter);
if (!number_from_miniexp (miniexp_car (iter), &miny)) goto unknown_link;
iter = miniexp_cdr (iter);
if (!number_from_miniexp (miniexp_car (iter), &width)) goto unknown_link;
iter = miniexp_cdr (iter);
if (!number_from_miniexp (miniexp_car (iter), &height)) goto unknown_link;
ev_link_mapping->area.x1 = minx;
ev_link_mapping->area.x2 = (minx + width);
ev_link_mapping->area.y1 = (page_info->height - (miny + height));
ev_link_mapping->area.y2 = (page_info->height - miny);
} else if (miniexp_car (iter) == miniexp_symbol ("poly")
&& miniexp_length (iter) >= 5 && miniexp_length (iter) % 2 == 1) {
/* FIXME: get bounding box since Evince doesn't support shaped links */
int minx = G_MAXINT, miny = G_MAXINT;
int maxx = G_MININT, maxy = G_MININT;
iter = miniexp_cdr(iter);
while (iter != miniexp_nil) {
int x, y;
if (!number_from_miniexp (miniexp_car(iter), &x)) goto unknown_link;
iter = miniexp_cdr (iter);
if (!number_from_miniexp (miniexp_car(iter), &y)) goto unknown_link;
iter = miniexp_cdr (iter);
minx = MIN (minx, x);
miny = MIN (miny, y);
maxx = MAX (maxx, x);
maxy = MAX (maxy, y);
}
ev_link_mapping->area.x1 = minx;
ev_link_mapping->area.x2 = maxx;
ev_link_mapping->area.y1 = (page_info->height - maxy);
ev_link_mapping->area.y2 = (page_info->height - miny);
} else {
/* unknown */
goto unknown_link;
}
return TRUE;
unknown_link:
g_warning("DjvuLibre error: Unknown hyperlink area %s", miniexp_to_name(miniexp_car(sexp)));
return FALSE;
}
/**
* Builds the index GtkTreeModel from DjVu s-expr
*
* (bookmarks
* ("title1" "dest1"
* ("title12" "dest12"
* ... )
* ... )
* ("title2" "dest2"
* ... )
* ... )
*/
static void
build_tree (const DjvuDocument *djvu_document,
GtkTreeModel *model,
GtkTreeIter *parent,
miniexp_t iter)
{
const char *title, *link_dest;
char *title_markup;
EvLinkAction *ev_action = NULL;
EvLink *ev_link = NULL;
GtkTreeIter tree_iter;
if (miniexp_car (iter) == miniexp_symbol ("bookmarks")) {
/* The (bookmarks) cons */
iter = miniexp_cdr (iter);
} else if ( miniexp_length (iter) >= 2 ) {
gchar *utf8_title = NULL;
/* An entry */
if (!string_from_miniexp (miniexp_car (iter), &title)) goto unknown_entry;
if (!string_from_miniexp (miniexp_cadr (iter), &link_dest)) goto unknown_entry;
if (!g_utf8_validate (title, -1, NULL)) {
utf8_title = str_to_utf8 (title);
title_markup = g_markup_escape_text (utf8_title, -1);
} else {
title_markup = g_markup_escape_text (title, -1);
}
ev_action = get_djvu_link_action (djvu_document, link_dest, -1);
if (ev_action) {
ev_link = ev_link_new (utf8_title ? utf8_title : title, ev_action);
gtk_tree_store_append (GTK_TREE_STORE (model), &tree_iter, parent);
gtk_tree_store_set (GTK_TREE_STORE (model), &tree_iter,
EV_DOCUMENT_LINKS_COLUMN_MARKUP, title_markup,
EV_DOCUMENT_LINKS_COLUMN_LINK, ev_link,
EV_DOCUMENT_LINKS_COLUMN_EXPAND, FALSE,
-1);
g_object_unref (ev_action);
g_object_unref (ev_link);
} else {
gtk_tree_store_append (GTK_TREE_STORE (model), &tree_iter, parent);
gtk_tree_store_set (GTK_TREE_STORE (model), &tree_iter,
EV_DOCUMENT_LINKS_COLUMN_MARKUP, title_markup,
EV_DOCUMENT_LINKS_COLUMN_EXPAND, FALSE,
-1);
}
g_free (title_markup);
g_free (utf8_title);
iter = miniexp_cddr (iter);
parent = &tree_iter;
} else {
goto unknown_entry;
}
for (; iter != miniexp_nil; iter = miniexp_cdr (iter)) {
build_tree (djvu_document, model, parent, miniexp_car (iter));
}
return;
unknown_entry:
g_warning ("DjvuLibre error: Unknown entry in bookmarks");
return;
}
jobject get_djvu_hyperlink_mapping(JNIEnv *jenv, ddjvu_document_t* djvu_document, ddjvu_pageinfo_t *page_info,
miniexp_t sexp)
{
miniexp_t iter;
const char *url, *url_target;
jobject hl = NULL;
iter = sexp;
if (miniexp_car(iter) != miniexp_symbol("maparea"))
{
ERROR("DjvuLibre error: Unknown hyperlink %s", miniexp_to_name(miniexp_car(sexp)));
return hl;
}
iter = miniexp_cdr(iter);
if (miniexp_caar(iter) == miniexp_symbol("url"))
{
if (!string_from_miniexp(miniexp_cadr(miniexp_car(iter)), &url))
{
ERROR("DjvuLibre error: Unknown hyperlink %s", miniexp_to_name(miniexp_car(sexp)));
return hl;
}
if (!string_from_miniexp(miniexp_caddr(miniexp_car(iter)), &url_target))
{
ERROR("DjvuLibre error: Unknown hyperlink %s", miniexp_to_name(miniexp_car(sexp)));
return hl;
}
}
else
{
if (!string_from_miniexp(miniexp_car(iter), &url))
{
ERROR("DjvuLibre error: Unknown hyperlink %s", miniexp_to_name(miniexp_car(sexp)));
return hl;
}
url_target = NULL;
}
iter = miniexp_cdr(iter);
/* FIXME: DjVu hyperlink comments are ignored */
int len = 0;
int type;
jint* data;
iter = miniexp_cdr(iter);
if ((data = get_djvu_hyperlink_area(page_info, miniexp_car(iter), type, len)) == NULL)
{
ERROR("DjvuLibre error: Unknown hyperlink %s", miniexp_to_name(miniexp_car(sexp)));
return hl;
}
iter = miniexp_cdr(iter);
/* FIXME: DjVu hyperlink attributes are ignored */
DEBUG("DjvuLibre: Hyperlink url: %s url_target: %s", url, url_target);
if (!url)
{
delete[] data;
return hl;
}
jclass pagelinkClass = jenv->FindClass("org/ebookdroid/core/codec/PageLink");
if (!pagelinkClass)
{
delete[] data;
return hl;
}
jmethodID plInitMethodId = jenv->GetMethodID(pagelinkClass, "<init>", "(Ljava/lang/String;I[I)V");
if (!plInitMethodId)
{
delete[] data;
return hl;
}
jintArray points = jenv->NewIntArray(len);
jenv->SetIntArrayRegion(points, 0, len, data);
jstring jstr = jenv->NewStringUTF(url);
hl = jenv->NewObject(pagelinkClass, plInitMethodId, jstr, (jint) type, points);
jenv->DeleteLocalRef(jstr);
jenv->DeleteLocalRef(points);
delete[] data;
// DEBUG("DjvuLibre: Hyperlink url: %s url_target: %s", url, url_target);
return hl;
}
JNIEXPORT jobjectArray JNICALL Java_universe_constellation_orion_viewer_djvu_DjvuDocument_getOutline(JNIEnv * env, jobject thiz)
{
miniexp_t outline = ddjvu_document_get_outline(doc);
if (outline == miniexp_dummy || outline == NULL) {
return NULL;
}
if (!miniexp_consp(outline) || miniexp_car(outline) != miniexp_symbol("bookmarks"))
{
LOGI("Outlines is empty");
}
list_item * root = (list_item *) malloc(sizeof(list_item));
root->next = NULL;
list * myList = (list *) malloc(sizeof(list));
myList->head = root;
myList->tail = root;
jclass olClass;
jmethodID ctor;
olClass = (*env)->FindClass(env, "universe/constellation/orion/viewer/outline/OutlineItem");
if (olClass == NULL) return NULL;
ctor = (*env)->GetMethodID(env, olClass, "<init>", "(ILjava/lang/String;I)V");
if (ctor == NULL) return NULL;
buildTOC(miniexp_cdr(outline), myList, 0, env, olClass, ctor);
list_item * next = myList->head;
int size = 0;
while (next->next != NULL) {
next = next->next;
size++;
}
LOGI("Outline has %i entries", size);
jobjectArray arr = (*env)->NewObjectArray(env, size, olClass, NULL);
if (arr == NULL) {
return NULL;
}
next = root->next;
int pos = 0;
while (next != NULL) {
OutlineItem * item = next->item;
jstring title = (*env)->NewStringUTF(env, item->title);
//shift pageno to zero based
jobject element = (*env)->NewObject(env, olClass, ctor, item->level, title, item->page - 1);
(*env)->SetObjectArrayElement(env, arr, pos, element);
(*env)->DeleteLocalRef(env, title);
(*env)->DeleteLocalRef(env, element);
free(item);
list_item * next2 = next->next;
free(next);
next = next2;
pos++;
}
free(root);
return arr;
}
static bool
exp_to_rect(miniexp_t expression, zathura_rectangle_t* rect)
{
if ((miniexp_car(expression) == miniexp_symbol("rect")
|| miniexp_car(expression) == miniexp_symbol("oval"))
&& miniexp_length(expression) == 5) {
int min_x = 0;
int min_y = 0;
int width = 0;
int height = 0;
miniexp_t iter = miniexp_cdr(expression);
if (exp_to_int(miniexp_car(iter), &min_x) == false) {
return false;
}
iter = miniexp_cdr(iter);
if (exp_to_int(miniexp_car(iter), &min_y) == false) {
return false;
}
iter = miniexp_cdr(iter);
if (exp_to_int(miniexp_car(iter), &width) == false) {
return false;
}
iter = miniexp_cdr(iter);
if (exp_to_int(miniexp_car(iter), &height) == false) {
return false;
}
rect->x1 = min_x;
rect->x2 = min_x + width;
rect->y1 = min_y;
rect->y2 = min_y + height;
} else if (miniexp_car(expression) == miniexp_symbol("poly")
&& miniexp_length(expression) >= 5) {
int min_x = 0;
int min_y = 0;
int max_x = 0;
int max_y = 0;
miniexp_t iter = miniexp_cdr(expression);
while (iter != miniexp_nil) {
int x = 0;
int y = 0;
if (exp_to_int(miniexp_car(iter), &x) == false) {
return false;
}
iter = miniexp_cdr(iter);
if (exp_to_int(miniexp_car(iter), &y) == false) {
return false;
}
iter = miniexp_cdr(iter);
min_x = MIN(min_x, x);
min_y = MIN(min_y, y);
max_x = MAX(max_x, x);
max_y = MAX(max_y, y);
}
rect->x1 = min_x;
rect->x2 = max_x;
rect->y1 = min_y;
rect->y2 = max_y;
}
return true;
}
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;
}