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-rw-r--r--src/bridge/colors.cpp162
1 files changed, 162 insertions, 0 deletions
diff --git a/src/bridge/colors.cpp b/src/bridge/colors.cpp
index 2f30354..024121b 100644
--- a/src/bridge/colors.cpp
+++ b/src/bridge/colors.cpp
@@ -1,7 +1,169 @@
#include <bridge/colors.hpp>
+#include <xmpp/xmpp_stanza.hpp>
+#include <utils/make_unique.hpp>
+
#include <algorithm>
#include <iostream>
+#include <string.h>
+
+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()->set_tail(txt);
+ else
+ current_node->set_inner(txt);
+
+ if (s[pos_end] == IRC_FORMAT_BOLD_CHAR)
+ styles.strong = !styles.strong;
+ 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())
+ {
+ current_node->close();
+ 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 += std::string("color:") +
+ irc_colors_to_css[styles.fg % IRC_NUM_COLORS] + ";";
+ if (styles.bg != -1)
+ styles_str += std::string("background-color:") +
+ 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()->set_tail(txt);
+ else
+ current_node->set_inner(txt);
+
+ if (current_node != result.get())
+ {
+ current_node->close();
+ result->add_child(current_node);
+ current_node = result.get();
+ }
+
+
+ result->close();
+ Xmpp::body body_res = std::make_tuple(cleaned, std::move(result));
+ return body_res;
}