Added option to strip trailing whitespaces on save, and add trailing newline if missing.

src/config.cc

@@ -146,6 +146,8 @@ void Config::get_source() {
   source.style=source_json.get<std::string>("style");
   source.font=source_json.get<std::string>("font");
 
+  source.strip_trailing_whitespaces=source_json.get<bool>("strip_trailing_whitespaces");
+
   source.show_map = source_json.get<bool>("show_map");
   source.map_font_size = source_json.get<std::string>("map_font_size");
 

src/config.h

@@ -49,6 +49,8 @@ public:
     std::string font;
     std::string spellcheck_language;
     
+    bool strip_trailing_whitespaces;
+    
     bool show_map;
     std::string map_font_size;
     

src/files.h

@@ -1,6 +1,6 @@
 #include <string>
 
-#define JUCI_VERSION "0.9.4"
+#define JUCI_VERSION "0.9.5"
 
 const std::string configjson =
 "{\n"
@@ -29,6 +29,8 @@ const std::string configjson =
 "        \"font\": \"Monospace\",\n"
 #endif
 #endif
+"        \"strip_trailing_whitespaces_comment\": \"Remove trailing whitespace characters on save, and add trailing newline if missing\",\n"
+"        \"strip_trailing_whitespaces\": false,\n"
 "        \"show_map\": true,\n"
 "        \"map_font_size\": \"1\",\n"
 "        \"spellcheck_language_comment\": \"Use \\\"\\\" to set language from your locale settings\",\n"

src/notebook.cc

@@ -172,6 +172,30 @@ bool Notebook::save(int page, bool reparse_needed) {
   }
   auto view=get_view(page);
   if (view->file_path != "" && view->get_buffer()->get_modified()) {
+    //strip trailing whitespaces and add trailing newline if missing
+    if(Singleton::config->source.strip_trailing_whitespaces) {
+      auto buffer=view->get_buffer();
+      for(int line=0;line<buffer->get_line_count();line++) {
+        auto iter=buffer->get_iter_at_line(line);
+        auto end_iter=iter;
+        while(!end_iter.ends_line())
+          end_iter.forward_char();
+        if(iter==end_iter)
+          continue;
+        iter=end_iter;
+        while(!iter.starts_line() && (*iter==' ' || *iter=='\t' || iter.ends_line()))
+          iter.backward_char();
+        if(!iter.starts_line())
+          iter.forward_char();
+        if(iter==end_iter)
+          continue;
+        buffer->erase(iter, end_iter);
+      }
+      auto iter=buffer->end();
+      if(!iter.starts_line())
+        buffer->insert(buffer->end(), "\n");
+    }
+    
     if(filesystem::write(view->file_path, view->get_buffer())) {
       if(reparse_needed) {
         if(auto clang_view=dynamic_cast<Source::ClangView*>(view)) {