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(require 'ldg-post)
(require 'ldg-state)

(defgroup ledger-register nil
  ""
  :group 'ledger)

(defcustom ledger-register-date-format "%m/%d/%y"
  "*The date format used for ledger register reports."
  :type 'string
  :group 'ledger-register)

(defcustom ledger-register-line-format "%s %-30.30s %-25.25s %15s\n"
  "*The date format used for ledger register reports."
  :type 'string
  :group 'ledger-register)

(defface ledger-register-pending-face
  '((((background light)) (:weight bold))
    (((background dark)) (:weight bold)))
  "Face used to highlight pending entries in a register report."
  :group 'ledger-register)

(defun ledger-register-render (data-buffer posts)
  (dolist (post posts)
    (let ((index 1))
      (dolist (xact (nthcdr 5 post))
	(let ((beg (point))
	      (where
	       (with-current-buffer data-buffer
		 (cons
		  (nth 0 post)
		  (if ledger-clear-whole-entries
		      (save-excursion
			(goto-line (nth 1 post))
			(point-marker))
		    (save-excursion
		      (goto-line (nth 0 xact))
		      (point-marker)))))))
	  (insert (format ledger-register-line-format
			  (format-time-string ledger-register-date-format
					      (nth 2 post))
			  (nth 4 post) (nth 1 xact) (nth 2 xact)))
	  (if (nth 3 xact)
	      (set-text-properties beg (1- (point))
				   (list 'face 'ledger-register-pending-face
					 'where where))
	    (set-text-properties beg (1- (point))
				 (list 'where where))))
	(setq index (1+ index)))))
  (goto-char (point-min))
  )

(defun ledger-register-generate (&optional data-buffer &rest args)
  (let ((buf (or data-buffer (current-buffer))))
    (with-current-buffer (get-buffer-create "*ledger-register*")
      (let ((pos (point))
	    (inhibit-read-only t))
	(erase-buffer)
	(ledger-register-render buf (apply #'ledger-exec-read buf args))
	(goto-char pos))
      (set-buffer-modified-p nil)
      (toggle-read-only t)
      (display-buffer (current-buffer) t))))

(provide 'ldg-register)