added a new item content type: markdown

- emacs editor has an option to select markdown, now it has two planes: one for content editing and the other to show preview
- CodeMirror editor updated to 5.64.0
- to convert markdown to html we use showdown https://github.com/showdownjs/showdown (conversion is done on the client side)

winixd/models/itemcontent.cpp

@@ -481,9 +481,26 @@ void ItemContent::print_content(HtmlTextStream & out, const std::wstring & conte
 }
 
 
+void ItemContent::print_content(HtmlTextStream & str)
+{
+	Config * config = get_config();
+	bool is_html_filter_on = (config && config->html_filter);
+
+	if( content_raw_type == ct_markdown )
+	{
+		print_content(str, content_parsed, content_parsed_type, is_html_filter_on);
+	}
+	else
+	{
+		print_content(str, content_raw, content_raw_type, is_html_filter_on);
+	}
+}
+
+
+
 void ItemContent::print_content(EzcEnv & env)
 {
-	print_content(env.out, content_raw, content_raw_type, true); // IMPROVE ME get the 'true' from the config (config->html_filter)
+	print_content(env.out);
 }
 
 
@@ -549,6 +566,45 @@ void ItemContent::group(morm::Wrapper & wrapper)
 }
 
 
+
+ItemContent::ContentType ItemContent::get_content_type_from_str(const wchar_t * str)
+{
+	struct Type
+	{
+		const wchar_t * str;
+		ContentType type;
+	};
+
+	static Type types[] = {
+		{L"0", ct_text},
+		{L"1", ct_formatted_text},
+		{L"2", ct_html},
+		{L"3", ct_bbcode},
+		{L"4", ct_other},
+		{L"5", ct_markdown},
+	};
+
+	size_t len = sizeof(types) / sizeof(Type);
+
+	for(size_t i=0 ; i<len ; ++i)
+	{
+		if( pt::is_equal(types[i].str, str) )
+		{
+			return types[i].type;
+		}
+	}
+
+	return ct_other;
+}
+
+
+ItemContent::ContentType ItemContent::get_content_type_from_str(const std::wstring & str)
+{
+	return get_content_type_from_str(str.c_str());
+}
+
+
+
 bool ItemContent::content_type_is(const std::wstring & type)
 {
 	if( content_raw_type == ItemContent::ct_text && type == L"text" )
@@ -565,6 +621,9 @@ bool ItemContent::content_type_is(const std::wstring & type)
 	else
 	if( content_raw_type == ItemContent::ct_other && type == L"other" )
 		return true;
+	else
+	if( content_raw_type == ItemContent::ct_markdown && type == L"markdown" )
+		return true;
 
 	return false;
 }