From f0510d2f90467de8e8f260b47d79a9baaf9bef17 Mon Sep 17 00:00:00 2001
From: Boris Kolpackov <boris@codesynthesis.com>
Date: Thu, 17 Sep 2009 07:15:29 +0200
Subject: Start tracking XSD with git

---
 xsd/usage.hxx | 226 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 226 insertions(+)
 create mode 100644 xsd/usage.hxx

(limited to 'xsd/usage.hxx')

diff --git a/xsd/usage.hxx b/xsd/usage.hxx
new file mode 100644
index 0000000..5107a96
--- /dev/null
+++ b/xsd/usage.hxx
@@ -0,0 +1,226 @@
+// file      : xsd/usage.hxx
+// author    : Boris Kolpackov <boris@codesynthesis.com>
+// copyright : Copyright (c) 2005-2009 Code Synthesis Tools CC
+// license   : GNU GPL v2 + exceptions; see accompanying LICENSE file
+
+#ifndef USAGE_HXX
+#define USAGE_HXX
+
+#include <cult/types.hxx>
+
+#include <backend-elements/indentation/buffer.hxx>
+#include <backend-elements/indentation/clip.hxx>
+
+namespace CLI
+{
+  using namespace Cult::Types;
+
+  template <typename C>
+  class OptionsUsage: public BackendElements::Indentation::Buffer<C>
+  {
+    typedef BackendElements::Indentation::Buffer<C> Buffer;
+
+  public:
+    typedef
+    typename Buffer::Traits
+    Traits;
+
+    typedef
+    typename Buffer::AsChar
+    AsChar;
+
+    typedef
+    typename Buffer::AsInt
+    AsInt;
+
+    typedef
+    typename Buffer::Write
+    Write;
+
+  public:
+    OptionsUsage (Buffer& out)
+        : out_ (out),
+          option_length_ (0),
+          construct_ (Construct::newline)
+    {
+    }
+
+  public:
+    virtual AsInt
+    put (AsChar c)
+    {
+      AsInt result (Traits::to_int_type (c));
+
+      try
+      {
+        switch (c)
+        {
+        case '\n':
+          {
+            switch (construct_)
+            {
+            case Construct::newline:
+              {
+                result = out_.put (c);
+                break;
+              }
+            case Construct::option:
+              {
+                construct_ = Construct::newline;
+                break;
+              }
+            case Construct::description:
+              {
+                result = out_.put (c);
+                construct_ = Construct::newline;
+                break;
+              }
+            default:
+              {
+                abort ();
+              }
+            }
+
+            break;
+          }
+        case '-':
+          {
+            switch (construct_)
+            {
+            case Construct::newline:
+              {
+                construct_ = Construct::option;
+
+                option_length_ = 0;
+
+                output_indentation ();
+                result = out_.put (c);
+
+                ++option_length_;
+
+                break;
+              }
+            case Construct::option:
+              {
+                ++option_length_;
+                //fall through
+              }
+            case Construct::description:
+              {
+                result = out_.put (c);
+                break;
+              }
+            default:
+              {
+                abort ();
+              }
+            }
+
+            break;
+          }
+        default:
+          {
+            switch (construct_)
+            {
+            case Construct::newline:
+              {
+                construct_ = Construct::description;
+
+                output_indentation ();
+
+                result = out_.put (c);
+                break;
+              }
+            case Construct::option:
+              {
+                ++option_length_;
+                //fall through
+              }
+            default:
+              {
+                result = out_.put (c);
+                break;
+              }
+            }
+
+            break;
+          }
+        }
+      }
+      catch (Write const&)
+      {
+        result = Traits::eof ();
+      }
+
+      return result;
+    }
+
+    virtual Void
+    unbuffer ()
+    {
+    }
+
+  private:
+    Void
+    output_indentation ()
+    {
+      UnsignedLong spaces;
+
+      switch (construct_)
+      {
+      case Construct::option:
+        {
+          spaces = 2;
+          option_length_ += 2;
+          break;
+        }
+      case Construct::description:
+        {
+          spaces = 29;
+
+          if (option_length_)
+          {
+            if (option_length_ > spaces)
+              spaces = 1;
+            else
+              spaces -= option_length_;
+
+            option_length_ = 0;
+          }
+
+          break;
+        }
+      default:
+        {
+          abort ();
+        }
+      }
+
+      while (spaces--)
+        out_.put (' ');
+    }
+
+  private:
+    Buffer& out_;
+    UnsignedLong option_length_;
+
+    struct Construct
+    {
+      enum Value
+      {
+        newline,
+        option,
+        description
+      };
+    };
+
+    typename Construct::Value construct_;
+  };
+
+  //@@ rename Indentation to Indent in be?
+  //
+  namespace Indent = BackendElements::Indentation;
+}
+
+#endif // USAGE_HXX
+
-- 
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