From fec65a0f24bfb434c284f1cf569be1e6ade00e9a Mon Sep 17 00:00:00 2001
From: Paul Beckingham <paul@beckingham.net>
Date: Sun, 31 Jan 2016 19:27:54 -0500
Subject: [PATCH] ColRecur: Added ::modify

---
 src/columns/ColRecur.cpp | 38 ++++++++++++++++++++++++++++++++++++++
 src/columns/ColRecur.h   |  1 +
 2 files changed, 39 insertions(+)

diff --git a/src/columns/ColRecur.cpp b/src/columns/ColRecur.cpp
index 5c543ee45..3c57b2833 100644
--- a/src/columns/ColRecur.cpp
+++ b/src/columns/ColRecur.cpp
@@ -28,11 +28,17 @@
 #include <ColRecur.h>
 #include <Context.h>
 #include <ISO8601.h>
+#include <Eval.h>
+#include <Variant.h>
+#include <Lexer.h>
+#include <Filter.h>
+#include <Dates.h>
 #include <text.h>
 #include <utf8.h>
 #include <i18n.h>
 
 extern Context context;
+extern Task& contextTask;
 
 ////////////////////////////////////////////////////////////////////////////////
 ColumnRecur::ColumnRecur ()
@@ -99,3 +105,35 @@ void ColumnRecur::render (
 }
 
 ////////////////////////////////////////////////////////////////////////////////
+// The duration is stored in raw form, but it must still be valid,
+// and therefore is parsed first.
+void ColumnRecur::modify (Task& task, const std::string& value)
+{
+  // Try to evaluate 'value'.  It might work.
+  Variant evaluatedValue;
+  try
+  {
+    Eval e;
+    e.addSource (domSource);
+    e.addSource (namedDates);
+    contextTask = task;
+    e.evaluateInfixExpression (value, evaluatedValue);
+  }
+
+  catch (...)
+  {
+    evaluatedValue = Variant (value);
+  }
+
+  if (evaluatedValue.type () == Variant::type_duration)
+  {
+    // Store the raw value, for 'recur'.
+    std::string label = "  MODIFICATION ";
+    context.debug (label + _name + " <-- '" + value + "'");
+    task.set (_name, value);
+  }
+  else
+    throw format (STRING_TASK_INVALID_DUR, value);
+}
+
+////////////////////////////////////////////////////////////////////////////////
diff --git a/src/columns/ColRecur.h b/src/columns/ColRecur.h
index 6d8d21faf..e83a9457d 100644
--- a/src/columns/ColRecur.h
+++ b/src/columns/ColRecur.h
@@ -38,6 +38,7 @@ public:
   void setStyle (const std::string&);
   void measure (Task&, unsigned int&, unsigned int&);
   void render (std::vector <std::string>&, Task&, int, Color&);
+  void modify (Task&, const std::string&);
 
 private:
 };