Use prettier to style format markdown and YAML files

src/source.cc

@@ -639,7 +639,8 @@ void Source::View::setup_signals() {
 void Source::View::setup_format_style(bool is_generic_view) {
   static auto prettier = filesystem::find_executable("prettier");
   if(!prettier.empty() && language &&
-     (language->get_id() == "js" || language->get_id() == "json" || language->get_id() == "css" || language->get_id() == "html")) {
+     (language->get_id() == "js" || language->get_id() == "json" || language->get_id() == "css" || language->get_id() == "html" ||
+      language->get_id() == "markdown" || language->get_id() == "yaml")) {
     if(is_generic_view) {
       goto_next_diagnostic = [this] {
         place_cursor_at_next_diagnostic();
@@ -877,137 +878,6 @@ void Source::View::setup_format_style(bool is_generic_view) {
       }
     };
   }
-  else if(language && language->get_id() == "markdown") {
-    // The style file currently has no options, but checking if it exists
-    format_style = [this](bool continue_without_style_file) {
-      bool has_style_file = false;
-      auto style_file_search_path = this->file_path.parent_path();
-      while(true) {
-        if(boost::filesystem::exists(style_file_search_path / ".markdown-format")) {
-          has_style_file = true;
-          break;
-        }
-        if(style_file_search_path == style_file_search_path.root_directory())
-          break;
-        style_file_search_path = style_file_search_path.parent_path();
-      }
-      if(!has_style_file && !continue_without_style_file)
-        return;
-
-      auto special_character = [](Gtk::TextIter iter) {
-        if(*iter == '*' || *iter == '#' || *iter == '<' || *iter == '>' || *iter == ' ' ||
-           *iter == '=' || *iter == '`' || *iter == '-' || *iter == '|')
-          return true;
-        // Tests if a line starts with for instance: 2.
-        if(*iter >= '0' && *iter <= '9' && iter.forward_char() &&
-           *iter == '.' && iter.forward_char() &&
-           *iter == ' ')
-          return true;
-        return false;
-      };
-
-      get_buffer()->begin_user_action();
-      disable_spellcheck = true;
-      cleanup_whitespace_characters();
-
-      auto iter = get_buffer()->begin();
-      size_t last_space_offset = -1;
-      bool headline = false;
-      bool monospace = false;
-      bool script = false;
-      bool html_tag = false;
-      bool table = false;
-      int square_brackets = 0;
-      do {
-        if(iter.starts_line()) {
-          last_space_offset = -1;
-          auto next_line_iter = iter;
-          if(*iter == '#' || (next_line_iter.forward_line() && *next_line_iter == '='))
-            headline = true;
-          else
-            headline = false;
-          auto test_iter = iter;
-          if(*test_iter == '`' && test_iter.forward_char() &&
-             *test_iter == '`' && test_iter.forward_char() &&
-             *test_iter == '`') {
-            script = !script;
-            iter.forward_chars(3);
-            continue;
-          }
-          // Test for YAML headers
-          test_iter = iter;
-          if(*test_iter == '-' && test_iter.forward_char() &&
-             *test_iter == '-' && test_iter.forward_char() &&
-             *test_iter == '-' && test_iter.forward_char() &&
-             test_iter.ends_line()) {
-            auto previous_line = iter;
-            auto next_line = test_iter;
-            if((previous_line.backward_char() && !previous_line.starts_line()) ||
-               (next_line.forward_char() && !next_line.ends_line())) {
-              script = !script;
-              iter.forward_chars(3);
-              continue;
-            }
-          }
-          table = *iter == '|';
-        }
-        if(!script && *iter == '`')
-          monospace = !monospace;
-        if(!script && !monospace) {
-          if(*iter == '<')
-            html_tag = true;
-          else if(*iter == '>')
-            html_tag = false;
-          else if(*iter == '[')
-            ++square_brackets;
-          else if(*iter == ']')
-            --square_brackets;
-        }
-        if(!headline && !script && !monospace && !html_tag && !table && square_brackets == 0) {
-          if(*iter == ' ' && iter.get_line_offset() <= 80)
-            last_space_offset = iter.get_offset();
-          // Insert newline on long lines
-          else if((*iter == ' ' || iter.ends_line()) && iter.get_line_offset() > 80 && last_space_offset != static_cast<size_t>(-1)) {
-            auto stored_iter = iter;
-            iter = get_buffer()->get_iter_at_offset(last_space_offset);
-            auto next_iter = iter;
-            next_iter.forward_char();
-            // Do not add newline if the next iter is a special character
-            if(special_character(next_iter)) {
-              iter = stored_iter;
-              if(*iter == ' ')
-                last_space_offset = iter.get_offset();
-              continue;
-            }
-            iter = get_buffer()->erase(iter, next_iter);
-            iter = get_buffer()->insert(iter, "\n");
-            iter.backward_char();
-          }
-          // Remove newline on short lines
-          else if(iter.ends_line() && !iter.starts_line() && iter.get_line_offset() <= 80) {
-            auto next_line_iter = iter;
-            // Do not remove newline if the next line for instance is a header
-            if(next_line_iter.forward_char() && !next_line_iter.ends_line() && !special_character(next_line_iter)) {
-              auto end_word_iter = next_line_iter;
-              // Do not remove newline if the word on the next line is too long
-              size_t diff = 0;
-              while(*end_word_iter != ' ' && !end_word_iter.ends_line() && end_word_iter.forward_char())
-                ++diff;
-              if(iter.get_line_offset() + diff + 1 <= 80) {
-                iter = get_buffer()->erase(iter, next_line_iter);
-                iter = get_buffer()->insert(iter, " ");
-                iter.backward_char();
-                if(iter.get_line_offset() <= 80)
-                  last_space_offset = iter.get_offset();
-              }
-            }
-          }
-        }
-      } while(iter.forward_char());
-      disable_spellcheck = false;
-      get_buffer()->end_user_action();
-    };
-  }
 }
 
 Source::View::~View() {