Blank slate message

Author: codeclown

CHANGELOG.md

@@ -3,6 +3,7 @@
 ## Next version
 
 - Detect "no crontab for X"
+- Display a message when the file is empty
 
 ## v0.1.0
 

lib/render.cpp

@@ -42,8 +42,16 @@ std::string render_logo() {
   return BOLD + "cronedit" + RESET;
 }
 
+std::string render_item_begin(std::string line_number, int width) {
+  return DIM + pad_left(line_number, width) + " | " + RESET;
+}
+
 std::string render_item_begin(int line_number, int width) {
-  return DIM + pad_left(std::to_string(line_number), width) + " | " + RESET;
+  return render_item_begin(std::to_string(line_number), width);
+}
+
+std::string render_blank_slate() {
+  return DIM + "Empty crontab. Press <n> to add a job." + RESET;
 }
 
 std::string render_quitting(std::string saved_file, std::string backup_file) {
@@ -262,7 +270,11 @@ std::string render_state(State& state, int terminal_width, int terminal_height)
 
   int space_for = terminal_height - 5;
   VisibleItemIndexes item_indexes = calculate_visible_item_indexes(space_for, active_item, (int)items.size());
-  if (item_indexes.begin_at >= 0) {
+  if (item_indexes.begin_at == -1) {
+    output << render_item_begin(" ", 1);
+    output << render_blank_slate();
+    output << std::endl;
+  } else {
     int longest_line_number = std::to_string(item_indexes.end_at).length();
     int space_on_line = terminal_width - longest_line_number - 3;
     for (int index = item_indexes.begin_at; index < item_indexes.end_at; ++index) {

lib/render.h

@@ -7,6 +7,10 @@ std::string render_logo();
 
 std::string render_item_begin(int line_number, int width);
 
+std::string render_item_begin(std::string, int width);
+
+std::string render_blank_slate();
+
 std::string render_quitting(std::string saved_file, std::string backup_file);
 
 struct VisibleItemIndexes {

lib/render_test.cpp

@@ -30,6 +30,17 @@ void test_very_simple_ones() {
     assert(rendered ==
       "{DIM} 1 | {RESET}"
     );
+    rendered = replace_ansi(render_item_begin(" ", 1), true);
+    debug_print_ui(rendered);
+    assert(rendered ==
+      "{DIM}  | {RESET}"
+    );
+
+    rendered = replace_ansi(render_blank_slate(), true);
+    debug_print_ui(rendered);
+    assert(rendered ==
+      "{DIM}Empty crontab. Press <n> to add a job.{RESET}"
+    );
 
     rendered = replace_ansi(render_error_message("foobar"), true);
     debug_print_ui(rendered);
@@ -383,6 +394,7 @@ void test_render_state() {
     debug_print_ui(rendered);
     assert(
       rendered == "\
+  | Empty crontab. Press <n> to add a job.\n\
 cronedit   <arrow keys> move   <s> save and quit   <q> quit\n\
            <n> new\n\n\
 ");