Keymap: Add ability to load keymap files by name

Userland/keymap.cpp

@@ -40,10 +40,30 @@ char* read_map(const JsonObject& json, const String& name)
  return map;
 }
 
-int read_map_from_file(String filename)
+RefPtr<CFile> open_keymap_file(String& filename)
 {
  auto file = CFile::construct(filename);
- if (!file->open(CIODevice::ReadOnly)) {
+ if (file->open(CIODevice::ReadOnly))
+ return file;
+
+ if (!filename.ends_with(".json")) {
+ StringBuilder full_path;
+ full_path.append("/res/keymaps/");
+ full_path.append(filename);
+ full_path.append(".json");
+ filename = full_path.to_string();
+ file = CFile::construct(filename);
+ if (file->open(CIODevice::ReadOnly))
+ return file;
+ }
+
+ return file;
+}
+
+int read_map_from_file(String& filename)
+{
+ auto file = open_keymap_file(filename);
+ if (!file->is_open()) {
  fprintf(stderr, "Failed to open %s: %s\n", filename.characters(), file->error_string());
  return 1;
  }
@@ -61,7 +81,7 @@ int read_map_from_file(String filename)
 int main(int argc, char** argv)
 {
  if (argc != 2) {
- fprintf(stderr, "usage: keymap <file>\n");
+ fprintf(stderr, "usage: keymap <name|file>\n");
  return 0;
  }