Date Formatting

- Some bad inefficiencies in date formatting were noticed, and when addressed,
  caused a bug to surface.  The length of a formatted date can be calculated
  from the dateformat, but was done incorrectly.  Very, very incorrectly.
- Added unit tests.
- Promoted date column-specific "countdown" size measurements up to the ColDate
  base class.  This neatly falls out from work on #1218.
- Noted a potential I18N problem in Date.cpp.

src/columns/ColDate.cpp

@@ -95,7 +95,13 @@ void ColumnDate::measure (Task& task, unsigned int& minimum, unsigned int& maxim
       if (format == "")
         format = context.config.get ("dateformat");
 
-      minimum = maximum = date.toString (format).length ();
+      minimum = maximum = Date::length (format);
+    }
+    else if (_style == "countdown")
+    {
+      Date date ((time_t) strtol (task.get (_name).c_str (), NULL, 10));
+      Date now;
+      minimum = maximum = Duration (now - date).format ().length ();
     }
     else if (_style == "julian")
     {
@@ -134,7 +140,7 @@ void ColumnDate::render (
       // Determine the output date format, which uses a hierarchy of definitions.
       //   rc.report.<report>.dateformat
       //   rc.dateformat.report
-      //   rc.dateformat.
+      //   rc.dateformat
       std::string format = context.config.get ("report." + _report + ".dateformat");
       if (format == "")
         format = context.config.get ("dateformat.report");
@@ -147,6 +153,16 @@ void ColumnDate::render (
             Date ((time_t) strtol (task.get (_name).c_str (), NULL, 10))
               .toString (format), width)));
     }
+    else if (_style == "countdown")
+    {
+      Date date ((time_t) strtol (task.get (_name).c_str (), NULL, 10));
+      Date now;
+
+      lines.push_back (
+        color.colorize (
+          rightJustify (
+            Duration (now - date).format (), width)));
+    }
     else if (_style == "julian")
     {
       lines.push_back (

src/columns/ColDue.cpp

@@ -73,46 +73,3 @@ void ColumnDue::setStyle (const std::string& value)
 }
 
 ////////////////////////////////////////////////////////////////////////////////
-// Set the minimum and maximum widths for the value.
-void ColumnDue::measure (Task& task, unsigned int& minimum, unsigned int& maximum)
-{
-  minimum = maximum = 0;
-
-  if (task.has (_name))
-  {
-    if (_style == "countdown")
-    {
-      Date date ((time_t) strtol (task.get (_name).c_str (), NULL, 10));
-      Date now;
-      minimum = maximum = Duration (now - date).format ().length ();
-    }
-    else
-      ColumnDate::measure (task, minimum, maximum);
-  }
-}
-
-////////////////////////////////////////////////////////////////////////////////
-void ColumnDue::render (
-  std::vector <std::string>& lines,
-  Task& task,
-  int width,
-  Color& color)
-{
-  if (task.has (_name))
-  {
-    if (_style == "countdown")
-    {
-      Date date ((time_t) strtol (task.get (_name).c_str (), NULL, 10));
-      Date now;
-
-      lines.push_back (
-        color.colorize (
-          rightJustify (
-            Duration (now - date).format (), width)));
-    }
-    else
-      ColumnDate::render (lines, task, width, color);
-  }
-}
-
-////////////////////////////////////////////////////////////////////////////////

src/columns/ColDue.h

@@ -39,8 +39,6 @@ public:
 
   bool validate (std::string&);
   void setStyle (const std::string&);
-  void measure (Task&, unsigned int&, unsigned int&);
-  void render (std::vector <std::string>&, Task&, int, Color&);
 };
 
 #endif

src/columns/ColScheduled.cpp

@@ -73,46 +73,3 @@ void ColumnScheduled::setStyle (const std::string& value)
 }
 
 ////////////////////////////////////////////////////////////////////////////////
-// Set the minimum and maximum widths for the value.
-void ColumnScheduled::measure (Task& task, unsigned int& minimum, unsigned int& maximum)
-{
-  minimum = maximum = 0;
-
-  if (task.has (_name))
-  {
-    if (_style == "countdown")
-    {
-      Date date ((time_t) strtol (task.get (_name).c_str (), NULL, 10));
-      Date now;
-      minimum = maximum = Duration (now - date).format ().length ();
-    }
-    else
-      ColumnDate::measure (task, minimum, maximum);
-  }
-}
-
-////////////////////////////////////////////////////////////////////////////////
-void ColumnScheduled::render (
-  std::vector <std::string>& lines,
-  Task& task,
-  int width,
-  Color& color)
-{
-  if (task.has (_name))
-  {
-    if (_style == "countdown")
-    {
-      Date date ((time_t) strtol (task.get (_name).c_str (), NULL, 10));
-      Date now;
-
-      lines.push_back (
-        color.colorize (
-          rightJustify (
-            Duration (now - date).format (), width)));
-    }
-    else
-      ColumnDate::render (lines, task, width, color);
-  }
-}
-
-////////////////////////////////////////////////////////////////////////////////

src/columns/ColScheduled.h

@@ -39,8 +39,6 @@ public:
 
   bool validate (std::string&);
   void setStyle (const std::string&);
-  void measure (Task&, unsigned int&, unsigned int&);
-  void render (std::vector <std::string>&, Task&, int, Color&);
 };
 
 #endif

src/columns/ColUDA.cpp

@@ -92,7 +92,7 @@ void ColumnUDA::measure (Task& task, unsigned int& minimum, unsigned int& maximu
         // Determine the output date format, which uses a hierarchy of definitions.
         //   rc.report.<report>.dateformat
         //   rc.dateformat.report
-        //   rc.dateformat.
+        //   rc.dateformat
         Date date ((time_t) strtol (value.c_str (), NULL, 10));
         std::string format = context.config.get ("report." + _report + ".dateformat");
         if (format == "")
@@ -100,7 +100,7 @@ void ColumnUDA::measure (Task& task, unsigned int& minimum, unsigned int& maximu
         if (format == "")
           format = context.config.get ("dateformat");
 
-        minimum = maximum = utf8_width (date.toString (format));
+        minimum = maximum = Date::length (format);
       }
       else if (_type == "duration")
       {