1 files changed, 108 insertions, 0 deletions
diff --git a/src/format.h b/src/format.h
new file mode 100644
index 00000000..1ddd8202
--- /dev/null
+++ b/src/format.h
@@ -0,0 +1,108 @@
+#ifndef _FORMAT_H
+#define _FORMAT_H
+
+#include "xpath.h"
+
+namespace ledger {
+
+class format_t
+{
+ public:
+  struct element_t
+  {
+    bool	align_left;
+    short	min_width;
+    short	max_width;
+
+    enum kind_t { UNKNOWN, TEXT, COLUMN, XPATH, GROUP } kind;
+    union {
+      string *  chars;
+      xml::xpath_t * xpath;
+      format_t *     format;
+    };
+
+    element_t()
+      : align_left(false), min_width(-1), max_width(-1),
+	kind(UNKNOWN), chars(NULL) {
+      TRACE_CTOR(element_t, "");
+    }
+
+    ~element_t() {
+      TRACE_DTOR(element_t);
+
+      switch (kind) {
+      case TEXT:
+	delete chars;
+	break;
+      case XPATH:
+	delete xpath;
+	break;
+      case GROUP:
+	delete format;
+	break;
+      default:
+	assert(! chars);
+	break;
+      }
+    }
+
+   private:
+    element_t(const element_t& other);
+  };
+
+  struct element_formatter_t {
+    virtual ~element_formatter_t() {}
+    virtual int operator()(std::ostream& out, element_t * element,
+			   xml::node_t * context, int column) const;
+  };
+
+  string		 format_string;
+  std::list<element_t *> elements;
+
+ private:
+  format_t(const format_t&);
+
+ public:
+  format_t() {
+    TRACE_CTOR(format_t, "");
+  }
+  format_t(const string& fmt) {
+    TRACE_CTOR(format_t, "const string&");
+    parse(fmt);
+  }
+
+  void clear_elements() {
+    for (std::list<element_t *>::iterator i = elements.begin();
+	 i != elements.end();
+	 i++)
+      delete *i;
+    elements.clear();
+  }
+
+  virtual ~format_t() {
+    TRACE_DTOR(format_t);
+    clear_elements();
+  }
+
+  void parse(const string& fmt);
+
+  void compile(const string& fmt, xml::node_t * context = NULL) {
+    parse(fmt);
+    compile(context);
+  }
+  void compile(xml::node_t * context = NULL);
+
+  int format(std::ostream& out, xml::node_t * context = NULL,
+	     int column = 0, const element_formatter_t& formatter =
+	     element_formatter_t()) const;
+
+  operator bool() const {
+    return ! format_string.empty();
+  }
+};
+
+DECLARE_EXCEPTION(format_exception);
+
+} // namespace ledger
+
+#endif // _FORMAT_H