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/*
Copyright (©) 2003-2025 Teus Benschop.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#include <edit/navigate.h>
#include <filter/roles.h>
#include <filter/string.h>
#include <filter/usfm.h>
#include <webserver/request.h>
#include <ipc/focus.h>
#include <editor/usfm2html.h>
#include <access/bible.h>
#include <database/config/bible.h>
std::string edit_navigate_url ()
{
return "edit/navigate";
}
bool edit_navigate_acl (Webserver_Request& webserver_request)
{
if (Filter_Roles::access_control (webserver_request, Filter_Roles::translator ()))
return true;
auto [ read, write ] = access_bible::any (webserver_request);
return write;
}
std::string edit_navigate (Webserver_Request& webserver_request)
{
const std::string bible = webserver_request.query ["bible"];
const int book = filter::strings::convert_to_int (webserver_request.query ["book"]);
const int chapter = filter::strings::convert_to_int (webserver_request.query ["chapter"]);
// At first the browser used the rangy library to get the offset of the caret.
// But the rangy library provides the offset relative to the element that contains the caret,
// not relative to the main editor element.
// Therefore a pure Javascript implementation was Googled for and implemented.
// This provides the offset of the caret relative to the <div id="editor">.
const size_t offset = static_cast<size_t> (filter::strings::convert_to_int (webserver_request.query ["offset"]));
const std::string stylesheet = database::config::bible::get_editor_stylesheet (bible);
const std::string usfm = database::bibles::get_chapter (bible, book, chapter);
Editor_Usfm2Html editor_usfm2html;
editor_usfm2html.load (usfm);
editor_usfm2html.stylesheet (stylesheet);
editor_usfm2html.run ();
// The caret offset should be in the main text body.
// If it is in a note body, skip the verse updating.
if (offset > editor_usfm2html.m_text_tength) return std::string();
// Get the number of verses in the USFM.
// This covers combined verses also.
int last_offset {0};
const std::vector <int> verses = filter::usfm::get_verse_numbers (usfm);
for (int i = 0; i < static_cast<int>(verses.size ()); i++) {
if (editor_usfm2html.m_verse_start_offsets.count (i)) {
last_offset = editor_usfm2html.m_verse_start_offsets [i];
} else {
editor_usfm2html.m_verse_start_offsets [i] = last_offset;
}
}
// Get the starting offsets for each verse.
std::vector <size_t> starting_offsets{};
for (int i = 0; i < static_cast<int> (verses.size ()); i++) {
starting_offsets.push_back (static_cast<size_t>(editor_usfm2html.m_verse_start_offsets [i]));
}
starting_offsets.push_back (editor_usfm2html.m_text_tength);
// Get the ending offsets for each verse.
std::vector <size_t> ending_offsets;
for (size_t i = 0; i < verses.size (); i++) {
size_t offset2 = starting_offsets [i];
for (size_t i2 = 0; i2 < starting_offsets.size (); i2++) {
if (starting_offsets [i2] > offset2) {
offset2 = starting_offsets [i2];
break;
}
}
ending_offsets.push_back (offset2 - 1);
}
// If the offset is between the focused verse's min and max values, then do nothing.
int verse = Ipc_Focus::getVerse (webserver_request);
for (size_t i = 0; i < verses.size (); i++) {
if (verse == verses[i]) {
if (offset >= starting_offsets [i]) {
if (offset <= ending_offsets [i]) {
return std::string();
}
}
}
}
// Look for the verse that matches the offset.
verse = -1;
for (const auto& element : editor_usfm2html.m_verse_start_offsets) {
int key = element.first;
size_t value = static_cast<size_t> (element.second);
if (offset >= value) {
// A verse number was found.
verse = key;
}
}
// Only act if a verse was found
if (verse >= 0) {
// Only update navigation in case the verse changed.
// This avoids unnecessary focus operations in the clients.
if (verse != Ipc_Focus::getVerse (webserver_request)) {
Ipc_Focus::set (webserver_request, book, chapter, verse);
}
// The editor should scroll the verse into view,
// because the caret is in the Bible text.
return std::to_string (verse);
// If the caret were in the notes area,
// then the editor should not scroll the verse into view.
}
return std::string();
}
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