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+;;; pcvs-info.el --- Internal representation of a fileinfo entry
+
+;; Copyright (C) 1991-2000  Free Software Foundation, Inc.
+
+;; Author: Stefan Monnier <monnier@cs.yale.edu>
+;; Keywords: pcl-cvs
+;; Version: $Name:  $
+;; Revision: $Id: pcl-cvs-info.el,v 1.28 2000/03/05 21:32:21 monnier Exp $
+
+;; This file is part of GNU Emacs.
+
+;; GNU Emacs is free software; you can redistribute it and/or modify
+;; it under the terms of the GNU General Public License as published by
+;; the Free Software Foundation; either version 2, or (at your option)
+;; any later version.
+
+;; GNU Emacs is distributed in the hope that it will be useful,
+;; but WITHOUT ANY WARRANTY; without even the implied warranty of
+;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+;; GNU General Public License for more details.
+
+;; You should have received a copy of the GNU General Public License
+;; along with GNU Emacs; see the file COPYING.  If not, write to the
+;; Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+;; Boston, MA 02111-1307, USA.
+
+;;; Commentary:
+
+;; The cvs-fileinfo data structure:
+;;
+;; When the `cvs update' is ready we parse the output.  Every file
+;; that is affected in some way is added to the cookie collection as
+;; a "fileinfo" (as defined below in cvs-create-fileinfo).
+
+;;; Code:
+
+(eval-when-compile (require 'cl))
+(require 'pcvs-util)
+;;(require 'pcvs-defs)
+
+;;;;
+;;;; config variables
+;;;;
+
+(defcustom cvs-display-full-path t
+  "*Specifies how the filenames should look like in the listing.
+If t, their full path name will be displayed, else only the filename."
+  :group 'pcl-cvs
+  :type '(boolean))
+
+(defvar global-font-lock-mode)
+(defvar font-lock-auto-fontify)
+(defcustom cvs-highlight
+  (or (and (boundp 'font-lock-auto-fontify) font-lock-auto-fontify)
+      (and (boundp 'global-font-lock-mode) global-font-lock-mode))
+  "*Whether to use text highlighting (à la font-lock) or not."
+  :group 'pcl-cvs
+  :type '(boolean))
+
+(defcustom cvs-allow-dir-commit nil
+  "*Allow `cvs-mode-commit' on directories.
+If you commit without any marked file and with the cursor positioned
+on a directory entry, cvs would commit the whole directory.  This seems
+to confuse some users sometimes."
+  :group 'pcl-cvs
+  :type '(boolean))
+
+
+;;;;
+;;;; Faces for fontification
+;;;;
+
+(defface cvs-header-face
+  '((((class color) (background dark))
+     (:foreground "lightyellow" :bold t))
+    (((class color) (background light))
+     (:foreground "blue4" :bold t))
+    (t (:bold t)))
+  "PCL-CVS face used to highlight directory changes."
+  :group 'pcl-cvs)
+
+(defface cvs-filename-face
+  '((((class color) (background dark))
+     (:foreground "lightblue"))
+    (((class color) (background light))
+     (:foreground "blue4"))
+    (t ()))
+  "PCL-CVS face used to highlight file names."
+  :group 'pcl-cvs)
+
+(defface cvs-unknown-face
+  '((((class color) (background dark))
+     (:foreground "red"))
+    (((class color) (background light))
+     (:foreground "red"))
+    (t (:italic t)))
+  "PCL-CVS face used to highlight unknown file status."
+  :group 'pcl-cvs)
+
+(defface cvs-handled-face
+  '((((class color) (background dark))
+     (:foreground "pink"))
+    (((class color) (background light))
+     (:foreground "pink"))
+    (t ()))
+  "PCL-CVS face used to highlight handled file status."
+  :group 'pcl-cvs)
+
+(defface cvs-need-action-face
+  '((((class color) (background dark))
+     (:foreground "orange"))
+    (((class color) (background light))
+     (:foreground "orange"))
+    (t (:italic t)))
+  "PCL-CVS face used to highlight status of files needing action."
+  :group 'pcl-cvs)
+
+(defface cvs-marked-face
+  '((((class color) (background dark))
+     (:foreground "green" :bold t))
+    (((class color) (background light))
+     (:foreground "green3" :bold t))
+    (t (:bold t)))
+  "PCL-CVS face used to highlight marked file indicator."
+  :group 'pcl-cvs)
+
+(defface cvs-msg-face
+  '((t (:italic t)))
+  "PCL-CVS face used to highlight CVS messages."
+  :group 'pcl-cvs)
+
+
+;; There is normally no need to alter the following variable, but if
+;; your site has installed CVS in a non-standard way you might have
+;; to change it.
+
+(defvar cvs-bakprefix ".#"
+  "The prefix that CVS prepends to files when rcsmerge'ing.")
+
+(easy-mmode-defmap cvs-filename-map
+  '(([(mouse-2)] . cvs-mode-find-file))
+  "Local keymap for text properties of file names"
+  :inherit 'cvs-mode-map)
+
+(easy-mmode-defmap cvs-status-map
+  '(([(mouse-2)] . cvs-mouse-toggle-mark))
+  "Local keymap for text properties of status"
+  :inherit 'cvs-mode-map)
+
+(easy-mmode-defmap cvs-dirname-map
+  '(([(mouse-2)] . cvs-mode-find-file))
+  "Local keymap for text properties of directory names"
+  :inherit 'cvs-mode-map)
+
+;; Constructor:
+
+(defstruct (cvs-fileinfo
+	    (:constructor nil)
+	    (:copier nil)
+	    (:constructor -cvs-create-fileinfo (type dir file full-log
+						     &key marked subtype
+						     merge
+						     base-rev
+						     head-rev))
+	    (:conc-name cvs-fileinfo->))
+  marked	;; t/nil.
+  type		;; See below
+  subtype	;; See below
+  dir		;; Relative directory the file resides in.
+                ;; (concat dir file) should give a valid path.
+  file	     	;; The file name sans the directory.
+  base-rev      ;; During status: This is the revision that the
+                ;; working file is based on.
+  head-rev      ;; During status: This is the highest revision in
+                ;; the repository.
+  merge		;; A cons cell containing the (ancestor . head) revisions
+		;; of the merge that resulted in the current file.
+  ;;removed	;; t if the file no longer exists.
+  full-log	;; The output from cvs, unparsed.
+  ;;mod-time	;; Not used.
+
+  ;; In addition to the above, the following values can be extracted:
+
+  ;; handled    ;; t if this file doesn't require further action.
+  ;; full-path  ;; The complete relative filename.
+  ;; pp-name    ;; The printed file name
+  ;; backup-file;; For MERGED and CONFLICT files after a \"cvs update\",
+                ;; this is a full path to the backup file where the
+                ;; untouched version resides.
+
+  ;; The meaning of the type field:
+  
+  ;; Value	      ---Used by---	Explanation
+  ;; 		      update status
+  ;; NEED-UPDATE		x	file needs update
+  ;; MODIFIED		x	x	modified by you, unchanged in repository
+  ;;   MERGED		x	x	successful merge
+  ;; ADDED		x	x	added by you, not yet committed
+  ;; MISSING			x	rm'd, but not yet `cvs remove'd
+  ;; REMOVED		x	x	removed by you, not yet committed
+  ;; NEED-MERGE			x	need merge
+  ;; CONFLICT		x		conflict when merging
+  ;; ;;MOD-CONFLICT	x		removed locally, changed in repository.
+  ;; DIRCHANGE		x	x	A change of directory.
+  ;; UNKNOWN		x		An unknown file.
+  ;; UP-TO-DATE			x	The file is up-to-date.
+  ;;   UPDATED		x	x	file copied from repository
+  ;;   PATCHED		x	x	diff applied from repository
+  ;;   COMMITTED		x	x	cvs commit'd
+  ;; DEAD				An entry that should be removed
+  ;; MESSAGE		x	x	This is a special fileinfo that is used
+  ;;					  to display a text that should be in
+  ;;					  full-log."
+  ;;   TEMP	A temporary message that should be removed
+  ;;   HEADER	A message that should stick at the top of the display
+  ;;   FOOTER	A message that should stick at the bottom of the display
+  )
+(defun cvs-create-fileinfo (type dir file msg &rest keys)
+  (cvs-check-fileinfo (apply #'-cvs-create-fileinfo type dir file msg keys)))
+
+;; Fake selectors:
+
+(defun cvs-fileinfo->full-path (fileinfo)
+  "Return the full path for the file that is described in FILEINFO."
+  (let ((dir (cvs-fileinfo->dir fileinfo)))
+    (if (eq (cvs-fileinfo->type fileinfo) 'DIRCHANGE)
+	(if (string= dir "") "." (directory-file-name dir))
+      ;; Here, I use `concat' rather than `expand-file-name' because I want
+      ;; the resulting path to stay relative if `dir' is relative.
+      ;; I could also use `expand-file-name' with `default-directory = ""'
+      (concat dir (cvs-fileinfo->file fileinfo)))))
+
+(defun cvs-fileinfo->pp-name (fi)
+  "Return the filename of FI as it should be displayed."
+  (if cvs-display-full-path
+      (cvs-fileinfo->full-path fi)
+    (cvs-fileinfo->file fi)))
+
+(defun cvs-fileinfo->backup-file (fileinfo)
+  "Construct the file name of the backup file for FILEINFO."
+  (let* ((dir (cvs-fileinfo->dir fileinfo))
+	 (file (cvs-fileinfo->file fileinfo))
+	 (default-directory (file-name-as-directory (expand-file-name dir)))
+	 (files (directory-files "." nil
+				 (concat "^" (regexp-quote cvs-bakprefix)
+					 (regexp-quote file) "\\.")))
+	 bf)
+    (dolist (f files bf)
+      (when (and (file-readable-p f)
+		 (or (null bf) (file-newer-than-file-p f bf)))
+	(setq bf (concat dir f))))))
+
+;; (defun cvs-fileinfo->handled (fileinfo)
+;;   "Tell if this requires further action"
+;;   (memq (cvs-fileinfo->type fileinfo) '(UP-TO-DATE DEAD)))
+
+
+;; Predicate:
+
+(defun boolp (x) (or (eq t x) (null x)))
+(defun cvs-check-fileinfo (fi)
+  "Check FI's conformance to some conventions."
+  (let ((check 'none)
+	(type (cvs-fileinfo->type fi))
+	(subtype (cvs-fileinfo->subtype fi))
+	(marked (cvs-fileinfo->marked fi))
+	(dir (cvs-fileinfo->dir fi))
+	(file (cvs-fileinfo->file fi))
+	(base-rev (cvs-fileinfo->base-rev fi))
+	(head-rev (cvs-fileinfo->head-rev fi))
+	(full-log (cvs-fileinfo->full-log fi)))
+    (if (and (setq check 'marked)	(boolp marked)
+	     (setq check 'base-rev)	(or (null base-rev) (stringp base-rev))
+	     (setq check 'head-rev)	(or (null head-rev) (stringp head-rev))
+	     (setq check 'full-log)	(stringp full-log)
+	     (setq check 'dir)
+	     (and (stringp dir)
+		  (not (file-name-absolute-p dir))
+		  (or (string= dir "")
+		      (string= dir (file-name-as-directory dir))))
+	     (setq check 'file)
+	     (and (stringp file)
+		  (string= file (file-name-nondirectory file)))
+	     (setq check 'type)		(symbolp type)
+	     (setq check 'consistency)
+	     (case type
+	       (DIRCHANGE (and (null subtype) (string= "." file)))
+	       ((NEED-UPDATE ADDED MISSING DEAD MODIFIED MESSAGE UP-TO-DATE
+			     REMOVED NEED-MERGE CONFLICT UNKNOWN MESSAGE)
+		t)))
+	fi
+      (error "Invalid :%s in cvs-fileinfo %s" check fi))))
+
+
+;;;; 
+;;;; State table to indicate what you can do when.
+;;;; 
+
+(defconst cvs-states
+  `((NEED-UPDATE	update diff)
+    (UP-TO-DATE		update nil remove diff safe-rm revert)
+    (MODIFIED		update commit undo remove diff merge diff-base)
+    (ADDED		update commit remove)
+    (MISSING     	remove undo update safe-rm revert)
+    (REMOVED     	commit add undo safe-rm)
+    (NEED-MERGE     	update undo diff diff-base)
+    (CONFLICT		merge remove undo commit diff diff-base)
+    (DIRCHANGE		remove update diff ,(if cvs-allow-dir-commit 'commit) tag)
+    (UNKNOWN		ignore add remove)
+    (DEAD		)
+    (MESSAGE))
+  "Fileinfo state descriptions for pcl-cvs.
+This is an assoc list.  Each element consists of (STATE . FUNS)
+- STATE (described in `cvs-create-fileinfo') is the key
+- FUNS is the list of applicable operations.
+  The first one (if any) should be the \"default\" action.
+Most of the actions have the obvious meaning.
+`safe-rm' indicates that the file can be removed without losing
+  any information.")
+
+;;;;
+;;;; Utility functions
+;;;;
+
+;;----------
+(defun cvs-applicable-p (fi-or-type func)
+  "Check if FUNC is applicable to FI-OR-TYPE.
+If FUNC is nil, always return t.
+FI-OR-TYPE can either be a symbol (a fileinfo-type) or a fileinfo."
+  (let ((type (if (symbolp fi-or-type) fi-or-type
+		(cvs-fileinfo->type fi-or-type))))
+    (and (not (eq type 'MESSAGE))
+	 (eq (car (memq func (cdr (assq type cvs-states)))) func))))
+
+;; (defun cvs-default-action (fileinfo)
+;;   "Return some kind of \"default\" action to be performed."
+;;   (second (assq (cvs-fileinfo->type fileinfo) cvs-states)))
+
+;; fileinfo pretty-printers:
+
+(defun cvs-add-face (str face &optional keymap)
+  (when cvs-highlight
+    (add-text-properties 0 (length str)
+			 (list* 'face face
+				(when keymap
+				  (list 'mouse-face 'highlight
+					'local-map keymap)))
+			 str))
+  str)
+
+;;----------
+(defun cvs-fileinfo-pp (fileinfo)
+  "Pretty print FILEINFO.  Insert a printed representation in current buffer.
+For use by the cookie package."
+  (cvs-check-fileinfo fileinfo)
+  (let ((type (cvs-fileinfo->type fileinfo))
+	(subtype (cvs-fileinfo->subtype fileinfo)))
+    (insert
+     (case type
+       (DIRCHANGE (concat "In directory "
+			  (cvs-add-face (cvs-fileinfo->full-path fileinfo)
+					'cvs-header-face cvs-dirname-map)
+			  ":"))
+       (MESSAGE
+	(if (memq (cvs-fileinfo->subtype fileinfo) '(FOOTER HEADER))
+	    (cvs-fileinfo->full-log fileinfo)
+	  (cvs-add-face (format "Message: %s" (cvs-fileinfo->full-log fileinfo))
+			'cvs-msg-face)))
+       (t
+	(let* ((status (if (cvs-fileinfo->marked fileinfo)
+			   (cvs-add-face "*" 'cvs-marked-face)
+			 " "))
+	       (file (cvs-add-face (cvs-fileinfo->pp-name fileinfo)
+				   'cvs-filename-face cvs-filename-map))
+	       (base (or (cvs-fileinfo->base-rev fileinfo) ""))
+	       (head (cvs-fileinfo->head-rev fileinfo))
+	       (type
+		(let ((str (case type
+			     ;;(MOD-CONFLICT "Not Removed")
+			     (DEAD	  "")
+			     (t (capitalize (symbol-name type)))))
+		      (face (case type
+			      (UP-TO-DATE 'cvs-handled-face)
+			      (UNKNOWN 'cvs-unknown-face)
+			      (t 'cvs-need-action-face))))
+		  (cvs-add-face str face cvs-status-map)))
+	       (side (or
+		      ;; maybe a subtype
+		      (when subtype (downcase (symbol-name subtype)))
+		      ;; or the head-rev
+		      (when (and head (not (string= head base))) head)
+		      ;; or nothing
+		      ""))
+	       ;; (action (cvs-add-face (case (cvs-default-action fileinfo)
+	       ;; 			  (commit "com")
+	       ;; 			  (update "upd")
+	       ;; 			  (undo   "udo")
+	       ;; 			  (t      "   "))
+	       ;; 			'cvs-action-face
+	       ;; 			cvs-action-map))
+	       )
+	  (concat (cvs-string-fill side 11) " "
+		  status " "
+		  (cvs-string-fill type 11) " "
+		  ;; action " "
+		  (cvs-string-fill base 11) " "
+		  file)))))))
+;;        it seems that `format' removes text-properties.  Too bad!
+;; 	  (format "%-11s %s %-11s %-11s %s"
+;; 	  	  side status type base file)))))))
+
+
+(defun cvs-fileinfo-update (fi fi-new)
+  "Update FI with the information provided in FI-NEW."
+  (let ((type (cvs-fileinfo->type fi-new))
+	(merge (cvs-fileinfo->merge fi-new)))
+    (setf (cvs-fileinfo->type fi) type)
+    (setf (cvs-fileinfo->subtype fi) (cvs-fileinfo->subtype fi-new))
+    (setf (cvs-fileinfo->full-log fi) (cvs-fileinfo->full-log fi-new))
+    (setf (cvs-fileinfo->base-rev fi) (cvs-fileinfo->base-rev fi-new))
+    (setf (cvs-fileinfo->head-rev fi) (cvs-fileinfo->head-rev fi-new))
+    (cond
+     (merge (setf (cvs-fileinfo->merge fi) merge))
+     ((memq type '(UP-TO-DATE NEED-UPDATE))
+      (setf (cvs-fileinfo->merge fi) nil)))))
+
+;;----------
+(defun cvs-fileinfo< (a b)
+  "Compare fileinfo A with fileinfo B and return t if A is `less'.
+The ordering defined by this function is such that directories are
+sorted alphabetically, and inside every directory the DIRCHANGE
+fileinfo will appear first, followed by all files (alphabetically)."
+  (let ((subtypea (cvs-fileinfo->subtype a))
+	(subtypeb (cvs-fileinfo->subtype b)))
+    (cond
+     ;; keep header and footer where they belong. Note: the order is important
+     ((eq subtypeb 'HEADER) nil)
+     ((eq subtypea 'HEADER) t)
+     ((eq subtypea 'FOOTER) nil)
+     ((eq subtypeb 'FOOTER) t)
+
+     ;; Sort according to directories.
+     ((string< (cvs-fileinfo->dir a) (cvs-fileinfo->dir b)) t)
+     ((not (string= (cvs-fileinfo->dir a) (cvs-fileinfo->dir b))) nil)
+
+     ;; The DIRCHANGE entry is always first within the directory.
+     ((eq (cvs-fileinfo->type b) 'DIRCHANGE) nil)
+     ((eq (cvs-fileinfo->type a) 'DIRCHANGE) t)
+
+     ;; All files are sorted by file name.
+     ((string< (cvs-fileinfo->file a) (cvs-fileinfo->file b))))))
+
+(provide 'pcvs-info)
+
+;;; pcl-cvs-info.el ends here