Add virtual converter output interface

typefactory/convertlatex.cpp

@@ -0,0 +1,88 @@
+#include "convertlatex.h"
+
+#include <cerrno>
+#include <cstring>
+#include <fstream>
+#include <iostream>
+
+static std::string latex_escape (const std::string &s) {
+  std::string out;
+  out.reserve (s.size() + s.size() / 8);
+  for (unsigned char ch : s) {
+    switch (ch) {
+      case '\\':
+        out += "\\textbackslash{}";
+        break;
+      case '{':
+        out += "\\{";
+        break;
+      case '}':
+        out += "\\}";
+        break;
+      case '%':
+        out += "\\%";
+        break;
+      case '$':
+        out += "\\$";
+        break;
+      case '#':
+        out += "\\#";
+        break;
+      case '&':
+        out += "\\&";
+        break;
+      case '_':
+        out += "\\_";
+        break;
+      case '^':
+        out += "\\textasciicircum{}";
+        break;
+      case '~':
+        out += "\\textasciitilde{}";
+        break;
+      default:
+        out.push_back (static_cast<char> (ch));
+        break;
+    }
+  }
+  return out;
+}
+
+bool ConvertLatex::save (const std::string &output_file_name) {
+  if (!parse())
+    return false;
+
+  std::ofstream output (output_file_name, std::ios::trunc);
+  if (!output.is_open()) {
+    std::cerr << "Failed to open output file: "
+              << output_file_name
+              << " (" << std::strerror (errno) << ")\n";
+    set_error_code (3);
+    return false;
+  }
+
+  const auto &book_titles = titles();
+  for (std::size_t i = 0; i < book_titles.size(); ++i) {
+    const auto &title = book_titles[i];
+    output << "\\section {" << latex_escape (title) << "}\n";
+
+    for (std::size_t quote_index = 0;
+         quote_index < quote_count (title);
+         ++quote_index) {
+      output << "  \\subsection {"
+             << latex_escape (quote_meta (title, quote_index))
+             << "}\n";
+
+      for (const auto &text_line : quote_text_lines (title, quote_index))
+        output << "    " << latex_escape (text_line) << "\n";
+
+      output << "      \\subsubsection{notes}\n\n";
+    }
+
+    if (i + 1 < book_titles.size())
+      output << "\n";
+  }
+
+  set_error_code (0);
+  return true;
+}