Minor Refactoring

- Added support for more type-specific checks of attribute values.
- Added support for more type-specific attribute rendering.
- Improved generalized methods for checking columns in a report.
- Added unit tests.
- Minor code cleanup.
- Added secret hidden feature for internal testing.

src/columns/ColUDA.cpp

@@ -0,0 +1,155 @@
+////////////////////////////////////////////////////////////////////////////////
+// taskwarrior - a command line task list manager.
+//
+// Copyright 2006-2012, Paul Beckingham, Federico Hernandez.
+//
+// Permission is hereby granted, free of charge, to any person obtaining a copy
+// of this software and associated documentation files (the "Software"), to deal
+// in the Software without restriction, including without limitation the rights
+// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+// copies of the Software, and to permit persons to whom the Software is
+// furnished to do so, subject to the following conditions:
+//
+// The above copyright notice and this permission notice shall be included
+// in all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+// THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+// SOFTWARE.
+//
+// http://www.opensource.org/licenses/mit-license.php
+//
+////////////////////////////////////////////////////////////////////////////////
+
+#define L10N                                           // Localization complete.
+
+#include <Context.h>
+#include <Duration.h>
+#include <Date.h>
+#include <ColUDA.h>
+#include <text.h>
+#include <i18n.h>
+
+extern Context context;
+
+////////////////////////////////////////////////////////////////////////////////
+ColumnUDA::ColumnUDA ()
+{
+  _name  = "<uda>";
+  _type  = "string";
+  _style = "default";
+  _label = "";
+
+  _hyphenate = (_type == "string") ? true : false;
+
+  _styles.push_back (_style);
+
+  // TODO _examples.push_back ("?");
+}
+
+////////////////////////////////////////////////////////////////////////////////
+ColumnUDA::~ColumnUDA ()
+{
+}
+
+////////////////////////////////////////////////////////////////////////////////
+// Set the minimum and maximum widths for the value.
+//
+void ColumnUDA::measure (Task& task, int& minimum, int& maximum)
+{
+  if (_style == "default")
+  {
+    std::string value = task.get (_name);
+
+    if (_type == "date")
+    {
+      // Determine the output date format, which uses a hierarchy of definitions.
+      //   rc.report.<report>.dateformat
+      //   rc.dateformat.report
+      //   rc.dateformat.
+      Date date ((time_t) strtol (value.c_str (), NULL, 10));
+      std::string format = context.config.get ("report." + _report + ".dateformat");
+      if (format == "")
+        format = context.config.get ("dateformat.report");
+      if (format == "")
+        format = context.config.get ("dateformat");
+
+      minimum = maximum = date.toString (format).length ();
+    }
+    else if (_type == "duration")
+    {
+      minimum = maximum = Duration (value).formatCompact ().length ();
+    }
+    else if (_type == "string")
+    {
+      std::string stripped = Color::strip (value);
+      maximum = longestLine (stripped);
+      minimum = longestWord (stripped);
+    }
+    else if (_type == "numeric")
+    {
+      minimum = maximum = value.length ();
+    }
+  }
+  else
+    throw format (STRING_COLUMN_BAD_FORMAT, _name, _style);
+}
+
+////////////////////////////////////////////////////////////////////////////////
+void ColumnUDA::render (
+  std::vector <std::string>& lines,
+  Task& task,
+  int width,
+  Color& color)
+{
+  if (_style == "default")
+  {
+    std::string value = task.get (_name);
+
+    if (_type == "date")
+    {
+      // Determine the output date format, which uses a hierarchy of definitions.
+      //   rc.report.<report>.dateformat
+      //   rc.dateformat.report
+      //   rc.dateformat.
+      std::string format = context.config.get ("report." + _report + ".dateformat");
+      if (format == "")
+        format = context.config.get ("dateformat.report");
+      if (format == "")
+        format = context.config.get ("dateformat");
+
+      lines.push_back (
+        color.colorize (
+          leftJustify (
+            Date ((time_t) strtol (value.c_str (), NULL, 10))
+              .toString (format), width)));
+    }
+    else if (_type == "duration")
+    {
+      lines.push_back (
+        color.colorize (
+          rightJustify (
+            Duration (value).formatCompact (),
+            width)));
+    }
+    else if (_type == "string")
+    {
+      std::vector <std::string> raw;
+      wrapText (raw, value, width, _hyphenate);
+
+      std::vector <std::string>::iterator i;
+      for (i = raw.begin (); i != raw.end (); ++i)
+        lines.push_back (color.colorize (leftJustify (*i, width)));
+    }
+    else if (_type == "numeric")
+    {
+      lines.push_back (color.colorize (rightJustify (value, width)));
+    }
+  }
+}
+
+////////////////////////////////////////////////////////////////////////////////