Feature

- Add the configuration variable 'print.empty.columns'.
- If this variable is set to 'no', columns with all empty values are not
  printed. This variable defaults to 'yes' (thus nothing is changed
  by default).
- Updated taskrc.5.in to mention the new variable.
- Added unit tests.

src/Config.cpp

@@ -289,6 +289,7 @@ std::string Config::_defaults =
   "complete.all.tags=no                           # Include old tag names in '_ags' command\n"
   "list.all.projects=no                           # Include old project names in 'projects' command\n"
   "list.all.tags=no                               # Include old tag names in 'tags' command\n"
+  "print.empty.columns=yes                        # Print columns which have no data for any task\n"
   "debug=no                                       # Display diagnostics\n"
   "extensions=off                                 # Extension system master switch\n"
   "fontunderline=yes                              # Uses underlines rather than -------\n"

src/ViewTask.cpp

@@ -113,6 +113,9 @@ std::string ViewTask::render (std::vector <Task>& data, std::vector <int>& seque
 {
   context.timer_render.start ();
 
+  bool const print_empty_columns = context.config.getBoolean ("print.empty.columns");
+  std::vector <Column*> nonempty_columns;
+
   // Determine minimal, ideal column widths.
   std::vector <int> minimal;
   std::vector <int> ideal;
@@ -121,7 +124,7 @@ std::string ViewTask::render (std::vector <Task>& data, std::vector <int>& seque
   for (i = _columns.begin (); i != _columns.end (); ++i)
   {
     // Headers factor in to width calculations.
-    int global_min = utf8_length ((*i)->label ());
+    int global_min = 0;
     int global_ideal = global_min;
 
     for (unsigned int s = 0; s < sequence.size (); ++s)
@@ -141,10 +144,24 @@ std::string ViewTask::render (std::vector <Task>& data, std::vector <int>& seque
       if (ideal > global_ideal) global_ideal = ideal;
     }
 
-    minimal.push_back (global_min);
-    ideal.push_back (global_ideal);
+    if (print_empty_columns || global_min != 0)
+    {
+      int label_length = utf8_length ((*i)->label ());
+      if (label_length > global_min) global_min = label_length;
+      if (label_length > global_ideal) global_ideal = label_length;
+      minimal.push_back (global_min);
+      ideal.push_back (global_ideal);
+    }
+
+    if (!print_empty_columns && global_min != 0)
+    {
+      nonempty_columns.push_back(*i);
+    }
   }
 
+  if (!print_empty_columns)
+    _columns = nonempty_columns;
+
   // Sum the minimal widths.
   int sum_minimal = 0;
   std::vector <int>::iterator c;

src/columns/ColPriority.cpp

@@ -85,7 +85,11 @@ void ColumnPriority::measure (Task& task, int& minimum, int& maximum)
 {
   std::string priority = task.get (_name);
 
-  minimum = maximum = 1;
+  if (priority == "")
+    minimum = maximum = 0;
+  else
+    minimum = maximum = 1;
+
   if (_style == "long")
   {
          if (priority == "H") minimum = maximum = 4;