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#include <bridge/colors.hpp>
#include <xmpp/xmpp_stanza.hpp>
#include <algorithm>
#include <iostream>
#include <string.h>
using namespace std::string_literals;
static const char IRC_NUM_COLORS = 16;
static const char* irc_colors_to_css[IRC_NUM_COLORS] = {
"white",
"black",
"blue",
"green",
"indianred",
"red",
"magenta",
"brown",
"yellow",
"lightgreen",
"cyan",
"lightcyan",
"lightblue",
"lightmagenta",
"gray",
"white",
};
#define XHTML_NS "http://www.w3.org/1999/xhtml"
struct styles_t
{
bool strong;
bool underline;
bool italic;
int fg;
int bg;
};
/** We keep the currently-applied CSS styles in a structure. Each time a tag
* is found, update this style list, then close the current span XML element
* (if it is open), then reopen it with all the new styles in it. This is
* done this way because IRC formatting does not map well with XML
* (hierarchical tags), it’s a lot easier and cleaner to remove all styles
* and reapply them for each tag, instead of trying to keep a consistent
* hierarchy of span, strong, em etc tags. The generated XML is one-level
* deep only.
*/
Xmpp::body irc_format_to_xhtmlim(const std::string& s)
{
if (s.find_first_of(irc_format_char) == std::string::npos)
// there is no special formatting at all
return std::make_tuple(s, nullptr);
std::string cleaned;
styles_t styles = {false, false, false, -1, -1};
std::unique_ptr<XmlNode> result = std::make_unique<XmlNode>("body");
(*result)["xmlns"] = XHTML_NS;
XmlNode* current_node = result.get();
std::string::size_type pos_start = 0;
std::string::size_type pos_end;
while ((pos_end = s.find_first_of(irc_format_char, pos_start)) != std::string::npos)
{
const std::string txt = s.substr(pos_start, pos_end-pos_start);
cleaned += txt;
if (current_node->has_children())
current_node->get_last_child()->add_to_tail(txt);
else
current_node->add_to_inner(txt);
if (s[pos_end] == IRC_FORMAT_BOLD_CHAR)
styles.strong = !styles.strong;
else if (s[pos_end] == IRC_FORMAT_NEWLINE_CHAR)
{
XmlNode* br_node = new XmlNode("br");
current_node->add_child(br_node);
cleaned += '\n';
}
else if (s[pos_end] == IRC_FORMAT_UNDERLINE_CHAR)
styles.underline = !styles.underline;
else if (s[pos_end] == IRC_FORMAT_ITALIC_CHAR)
styles.italic = !styles.italic;
else if (s[pos_end] == IRC_FORMAT_RESET_CHAR)
styles = {false, false, false, -1, -1};
else if (s[pos_end] == IRC_FORMAT_REVERSE_CHAR)
{ } // TODO
else if (s[pos_end] == IRC_FORMAT_REVERSE2_CHAR)
{ } // TODO
else if (s[pos_end] == IRC_FORMAT_FIXED_CHAR)
{ } // TODO
else if (s[pos_end] == IRC_FORMAT_COLOR_CHAR)
{
size_t pos = pos_end + 1;
styles.fg = -1;
styles.bg = -1;
// get the first number following the format char
if (pos < s.size() && s[pos] >= '0' && s[pos] <= '9')
{ // first digit
styles.fg = s[pos++] - '0';
if (pos < s.size() && s[pos] >= '0' && s[pos] <= '9')
// second digit
styles.fg = styles.fg * 10 + s[pos++] - '0';
}
if (pos < s.size() && s[pos] == ',')
{ // get bg color after the comma
pos++;
if (pos < s.size() && s[pos] >= '0' && s[pos] <= '9')
{ // first digit
styles.bg = s[pos++] - '0';
if (pos < s.size() && s[pos] >= '0' && s[pos] <= '9')
// second digit
styles.bg = styles.bg * 10 + s[pos++] - '0';
}
}
pos_end = pos - 1;
}
// close opened span, if any
if (current_node != result.get())
{
result->add_child(current_node);
current_node = result.get();
}
// Take all currently-applied style and create a new span with it
std::string styles_str;
if (styles.strong)
styles_str += "font-weight:bold;";
if (styles.underline)
styles_str += "text-decoration:underline;";
if (styles.italic)
styles_str += "font-style:italic;";
if (styles.fg != -1)
styles_str += "color:"s +
irc_colors_to_css[styles.fg % IRC_NUM_COLORS] + ";";
if (styles.bg != -1)
styles_str += "background-color:"s +
irc_colors_to_css[styles.bg % IRC_NUM_COLORS] + ";";
if (!styles_str.empty())
{
current_node = new XmlNode("span");
(*current_node)["style"] = styles_str;
}
pos_start = pos_end + 1;
}
// If some text remains, without any format char, just append that text at
// the end of the current node
const std::string txt = s.substr(pos_start, pos_end-pos_start);
cleaned += txt;
if (current_node->has_children())
current_node->get_last_child()->add_to_tail(txt);
else
current_node->add_to_inner(txt);
if (current_node != result.get())
result->add_child(current_node);
Xmpp::body body_res = std::make_tuple(cleaned, std::move(result));
return body_res;
}
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