DOM: Demoted from class to functions

- The DOM object contains no members, and only two (effectively) const methods.
  Demoting DOM to function calls reduces coupling with Context.

src/Context.cpp

@@ -71,7 +71,6 @@ Context::Context ()
 , data_dir ("~/.task")
 , config ()
 , tdb2 ()
-, dom ()
 , determine_color_use (true)
 , use_color (true)
 , run_gc (true)

src/Context.h

@@ -33,7 +33,6 @@
 #include <Task.h>
 #include <TDB2.h>
 #include <Hooks.h>
-#include <DOM.h>
 #include <FS.h>
 #include <CLI2.h>
 #include <Timer.h>
@@ -85,7 +84,6 @@ public:
 
   TDB2                                tdb2;
   Hooks                               hooks;
-  DOM                                 dom;
 
   bool                                determine_color_use;
   bool                                use_color;

src/DOM.cpp

@@ -52,7 +52,7 @@ extern Context context;
 //   system.version
 //   system.os
 //
-bool DOM::get (const std::string& name, Variant& value)
+bool getDOM (const std::string& name, Variant& value)
 {
   // Special case, blank refs cause problems.
   if (name == "")
@@ -194,7 +194,7 @@ bool DOM::get (const std::string& name, Variant& value)
 //
 // This code emphasizes speed, hence 'id' and 'urgecny' being evaluated first
 // as special cases.
-bool DOM::get (const std::string& name, const Task& task, Variant& value)
+bool getDOM (const std::string& name, const Task& task, Variant& value)
 {
   // Special case, blank refs cause problems.
   if (name == "")
@@ -331,7 +331,7 @@ bool DOM::get (const std::string& name, const Task& task, Variant& value)
     int count = 0;
 
     // Count off the 'a'th annotation.
-    for (auto& i : annos)
+    for (const auto& i : annos)
     {
       if (++count == a)
       {
@@ -360,7 +360,7 @@ bool DOM::get (const std::string& name, const Task& task, Variant& value)
     int count = 0;
 
     // Count off the 'a'th annotation.
-    for (auto& i : annos)
+    for (const auto& i : annos)
     {
       if (++count == a)
       {
@@ -388,7 +388,7 @@ bool DOM::get (const std::string& name, const Task& task, Variant& value)
   }
 
   // Delegate to the context-free version of DOM::get.
-  return this->get (name, value);
+  return getDOM (name, value);
 }
 
 ////////////////////////////////////////////////////////////////////////////////

src/DOM.h

@@ -30,16 +30,8 @@
 #include <string>
 #include <Variant.h>
 #include <Task.h>
-#include <time.h>
 
-class DOM
+bool getDOM (const std::string&, Variant&);
-{
+bool getDOM (const std::string&, const Task&, Variant&);
-public:
-  bool get (const std::string&, Variant&);
-  bool get (const std::string&, const Task&, Variant&);
-
-private:
-};
 
 #endif
-////////////////////////////////////////////////////////////////////////////////

src/Filter.cpp

@@ -28,6 +28,7 @@
 #include <Filter.h>
 #include <algorithm>
 #include <Context.h>
+#include <DOM.h>
 #include <Eval.h>
 #include <Variant.h>
 #include <Dates.h>
@@ -45,7 +46,7 @@ Task& contextTask = dummy;
 ////////////////////////////////////////////////////////////////////////////////
 bool domSource (const std::string& identifier, Variant& value)
 {
-  if (context.dom.get (identifier, contextTask, value))
+  if (getDOM (identifier, contextTask, value))
   {
     value.source (identifier);
     return true;

src/Hooks.cpp

@@ -37,6 +37,8 @@
 #include <sys/wait.h>
 #include <sys/types.h>
 #include <Context.h>
+#include <Variant.h>
+#include <DOM.h>
 #include <JSON.h>
 #include <Timer.h>
 #include <text.h>
@@ -501,7 +503,7 @@ std::vector <std::string>& Hooks::buildHookScriptArgs (std::vector <std::string>
   args.push_back ("api:2");
 
   // Command line Taskwarrior was called with.
-  context.dom.get ("context.args", v);
+  getDOM ("context.args", v);
   args.push_back ("args:" + std::string (v));
 
   // Command to be executed.

src/commands/CmdGet.cpp

@@ -28,6 +28,7 @@
 #include <CmdGet.h>
 #include <Variant.h>
 #include <Context.h>
+#include <DOM.h>
 #include <main.h>
 #include <text.h>
 #include <i18n.h>
@@ -67,7 +68,7 @@ int CmdGet::execute (std::string& output)
       {
         Task t;
         Variant result;
-        if (context.dom.get (arg.attribute ("raw"), t, result))
+        if (getDOM (arg.attribute ("raw"), t, result))
           results.push_back ((std::string) result);
         else
           results.push_back ("");