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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 <editor/html2format.h>
#include <filter/string.h>
#include <filter/url.h>
#include <filter/usfm.h>
#include <locale/translate.h>
#include <styles/logic.h>
#include <database/logs.h>
#include <pugixml/utils.h>
#include <filter/quill.h>
void Editor_Html2Format::load (std::string html)
{
// The web editor may insert non-breaking spaces. Convert them to normal spaces.
html = filter::strings::replace (filter::strings::unicode_non_breaking_space_entity (), " ", html);
// The web editor produces <hr> and other elements following the HTML specs,
// but the pugixml XML parser needs <hr/> and similar elements.
html = filter::strings::html2xml (html);
std::string xml = "<body>" + html + "</body>";
// Parse document such that all whitespace is put in the DOM tree.
// See https://pugixml.org/docs/manual.html for more information.
// It is not enough to only parse with parse_ws_pcdata_single, it really needs parse_ws_pcdata.
// This is significant for, for example, the space after verse numbers, among other cases.
pugi::xml_parse_result result = document.load_string (xml.c_str(), pugi::parse_ws_pcdata);
// Log parsing errors.
pugixml_utils_error_logger (&result, xml);
}
void Editor_Html2Format::run ()
{
preprocess ();
process ();
postprocess ();
}
void Editor_Html2Format::process ()
{
// Iterate over the children to retrieve the "p" elements, then process them.
pugi::xml_node body = document.first_child ();
for (pugi::xml_node node : body.children()) {
// Process the node.
process_node (node);
}
}
void Editor_Html2Format::process_node (pugi::xml_node node)
{
switch (node.type ()) {
case pugi::node_element:
{
// Skip a note with class "ql-cursor" because that is an internal Quill node.
// The user didn't insert it.
const std::string classs = node.attribute("class").value();
if (classs == quill::caret_class)
break;
// Process node normally.
open_element_node (node);
for (pugi::xml_node child : node.children()) {
process_node (child);
}
close_element_node (node);
break;
}
case pugi::node_pcdata:
{
// Add the text with the current character format to the containers.
const std::string text = node.text ().get ();
texts.push_back(text);
formats.push_back(current_character_format);
break;
}
case pugi::node_null:
case pugi::node_document:
case pugi::node_cdata:
case pugi::node_comment:
case pugi::node_pi:
case pugi::node_declaration:
case pugi::node_doctype:
default:
{
const std::string nodename = node.name ();
Database_Logs::log ("XML node " + nodename + " not handled while saving editor text");
break;
}
}
}
void Editor_Html2Format::open_element_node (pugi::xml_node node)
{
// The tag and class names of this element node.
const std::string tag_name = node.name ();
std::string class_name = update_quill_class (node.attribute ("class").value ());
if (tag_name == "p")
{
// In the editor, it may occur that the p element does not have a class.
// Use the 'p' class in such a case.
if (class_name.empty ())
class_name = "p";
texts.push_back("\n");
formats.push_back(class_name);
// A new line starts: Clear the character formatting.
current_character_format.clear();
}
if (tag_name == "span")
{
open_inline (class_name);
}
}
void Editor_Html2Format::close_element_node (pugi::xml_node node)
{
// The tag and class names of this element node.
const std::string tag_name = node.name ();
std::string class_name = update_quill_class (node.attribute ("class").value ());
if (tag_name == "p")
{
// While editing it happens that the p element does not have a class.
// Use the 'p' class in such cases.
if (class_name.empty())
class_name = "p";
// Clear active character styles.
current_character_format.clear();
}
if (tag_name == "span")
{
// End of span: Clear character formatting.
current_character_format.clear();
}
}
void Editor_Html2Format::open_inline (std::string class_name)
{
current_character_format = class_name;
}
void Editor_Html2Format::preprocess ()
{
texts.clear();
formats.clear();
}
void Editor_Html2Format::postprocess ()
{
}
std::string Editor_Html2Format::update_quill_class (std::string class_name)
{
class_name = filter::strings::replace (quill::class_prefix_block, std::string(), std::move(class_name));
class_name = filter::strings::replace (quill::class_prefix_inline, std::string(), std::move(class_name));
class_name = quill::underscore_to_hyphen (std::move(class_name));
return class_name;
}
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