code.delx.au - gnu-emacs-elpa/blob - packages/ada-mode/ada-gnat-xref.el

   1 ;; Ada mode cross-reference functionality provided by the 'gnat xref'
   2 ;; tool. Includes related functions, such as gnatprep support.
   3 ;;
   4 ;; These tools are all Ada-specific; see gnat-inspect for
   5 ;; multi-language GNAT cross-reference tools.
   6 ;;
   7 ;; GNAT is provided by AdaCore; see http://libre.adacore.com/
   8 ;;
   9 ;;; Copyright (C) 2012, 2013  Free Software Foundation, Inc.
  10 ;;
  11 ;; Author: Stephen Leake <stephen_leake@member.fsf.org>
  12 ;; Maintainer: Stephen Leake <stephen_leake@member.fsf.org>
  13 ;;
  14 ;; This file is part of GNU Emacs.
  15 ;;
  16 ;; GNU Emacs is free software: you can redistribute it and/or modify
  17 ;; it under the terms of the GNU General Public License as published by
  18 ;; the Free Software Foundation, either version 3 of the License, or
  19 ;; (at your option) any later version.
  20 ;;
  21 ;; GNU Emacs is distributed in the hope that it will be useful,
  22 ;; but WITHOUT ANY WARRANTY; without even the implied warranty of
  23 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  24 ;; GNU General Public License for more details.
  25 ;;
  26 ;; You should have received a copy of the GNU General Public License
  27 ;; along with GNU Emacs.  If not, see <http://www.gnu.org/licenses/>.
  28 ;;
  29 ;;; Usage:
  30 ;;
  31 ;; Emacs should enter Ada mode automatically when you load an Ada
  32 ;; file, based on the file extension.
  33 ;;
  34 ;; By default, ada-mode is configured to load this file, so nothing
  35 ;; special needs to done to use it.
  36
  37 (require 'ada-fix-error)
  38 (require 'compile)
  39 (require 'gnat-core)
  40
  41 ;;;;; code
  42
  43 ;;;; uses of gnat tools
  44
  45 (defconst ada-gnat-file-line-col-regexp "\\(.*\\):\\([0-9]+\\):\\([0-9]+\\)")
  46
  47 (defun ada-gnat-xref-other (identifier file line col)
  48   "For `ada-xref-other-function', using 'gnat find', which is Ada-specific."
  49
  50   (when (eq ?\" (aref identifier 0))
  51     ;; gnat find wants the quotes on operators, but the column is after the first quote.
  52     (setq col (+ 1 col))
  53     )
  54
  55   (let* ((arg (format "%s:%s:%d:%d" identifier file line col))
  56          (switches (when (ada-prj-get 'gpr_ext) (concat "--ext=" (ada-prj-get 'gpr_ext))))
  57          status
  58          (result nil))
  59     (with-current-buffer (gnat-run-buffer)
  60       (gnat-run-gnat "find" (list switches arg))
  61
  62       (goto-char (point-min))
  63       (forward-line 2); skip ADA_PROJECT_PATH, 'gnat find'
  64
  65       ;; gnat find returns two items; the starting point, and the 'other' point
  66       (unless (looking-at (concat ada-gnat-file-line-col-regexp ":"))
  67         ;; no results
  68         (error "'%s' not found in cross-reference files; recompile?" identifier))
  69
  70       (while (not result)
  71         (looking-at (concat ada-gnat-file-line-col-regexp "\\(: warning:\\)?"))
  72         (if (match-string 4)
  73             ;; error in *.gpr; ignore here.
  74             (forward-line 1)
  75           ;; else process line
  76           (let ((found-file (match-string 1))
  77                 (found-line (string-to-number (match-string 2)))
  78                 (found-col  (string-to-number (match-string 3))))
  79             (if (not
  80                  (and
  81                   (equal file found-file)
  82                   (= line found-line)
  83                   (= col found-col)))
  84                 ;; found other item
  85                 (setq result (list found-file found-line (1- found-col)))
  86               (forward-line 1))
  87             ))
  88
  89         (when (eobp)
  90           (pop-to-buffer (current-buffer))
  91           (error "gnat find did not return other item"))
  92         ))
  93     result))
  94
  95 (defun ada-gnat-xref-parents (identifier file line col)
  96   "For `ada-xref-parents-function', using 'gnat find', which is Ada-specific."
  97
  98   (let* ((arg (format "%s:%s:%d:%d" identifier file line col))
  99          (switches (concat
 100                     "-d"
 101                     (when (ada-prj-get 'gpr_ext) (concat "--ext=" (ada-prj-get 'gpr_ext)))
 102                     ))
 103          (result nil))
 104     (with-current-buffer (gnat-run-buffer)
 105       (gnat-run-gnat "find" (list switches arg))
 106
 107       (goto-char (point-min))
 108       (forward-line 2); skip GPR_PROJECT_PATH, 'gnat find'
 109
 110       ;; gnat find returns two items; the starting point, and the 'other' point
 111       (unless (looking-at (concat ada-gnat-file-line-col-regexp ":"))
 112         ;; no results
 113         (error "'%s' not found in cross-reference files; recompile?" identifier))
 114
 115       (while (not result)
 116         (looking-at (concat ada-gnat-file-line-col-regexp "\\(: warning:\\)?"))
 117         (if (match-string 4)
 118             ;; error in *.gpr; ignore here.
 119             (forward-line 1)
 120           ;; else process line
 121           (let ((found-file (match-string 1))
 122                 (found-line (string-to-number (match-string 2)))
 123                 (found-col  (string-to-number (match-string 3))))
 124
 125             (skip-syntax-forward "^ ")
 126             (skip-syntax-forward " ")
 127             (if (looking-at (concat "derived from .* (" ada-gnat-file-line-col-regexp ")"))
 128                 ;; found other item
 129                 (setq result (list (match-string 1)
 130                                    (string-to-number (match-string 2))
 131                                    (1- (string-to-number (match-string 3)))))
 132               (forward-line 1)))
 133           )
 134         (when (eobp)
 135           (pop-to-buffer (current-buffer))
 136           (error "gnat find did not return parent types"))
 137         ))
 138
 139     (ada-goto-source (nth 0 result)
 140                      (nth 1 result)
 141                      (nth 2 result)
 142                      nil ;; other-window
 143                      )
 144     ))
 145
 146 (defun ada-gnat-xref-all (identifier file line col)
 147   "For `ada-xref-all-function'."
 148   ;; we use `compilation-start' to run gnat, not `gnat-run', so it
 149   ;; is asynchronous, and automatically runs the compilation error
 150   ;; filter.
 151
 152   (let* ((cmd (format "gnat find -r %s:%s:%d:%d" identifier file line col)))
 153
 154     (with-current-buffer (gnat-run-buffer); for default-directory
 155       (let ((compilation-environment (ada-prj-get 'proc_env))
 156             (compilation-error "reference")
 157             ;; gnat find uses standard gnu format for output, so don't
 158             ;; need to set compilation-error-regexp-alist
 159             )
 160         (when (ada-prj-get 'gpr_file)
 161           (setq cmd (concat cmd " -P" (file-name-nondirectory (ada-prj-get 'gpr_file)))))
 162
 163         (compilation-start cmd
 164                            'compilation-mode
 165                            (lambda (mode-name) (concat mode-name "-gnatfind")))
 166     ))))
 167
 168 ;;;;; setup
 169
 170 (defun ada-gnat-xref-select-prj ()
 171   (setq ada-file-name-from-ada-name 'ada-gnat-file-name-from-ada-name)
 172   (setq ada-ada-name-from-file-name 'ada-gnat-ada-name-from-file-name)
 173   (setq ada-make-package-body       'ada-gnat-make-package-body)
 174
 175   (add-hook 'ada-syntax-propertize-hook 'gnatprep-syntax-propertize)
 176
 177   ;; must be after indentation engine setup, because that resets the
 178   ;; indent function list.
 179   (add-hook 'ada-mode-hook 'ada-gnat-xref-setup t)
 180
 181   (setq ada-xref-other-function  'ada-gnat-xref-other)
 182   (setq ada-xref-parent-function 'ada-gnat-xref-parents)
 183   (setq ada-xref-all-function    'ada-gnat-xref-all)
 184
 185   ;; gnatmake -gnatD generates files with .dg extensions. But we don't
 186   ;; need to navigate between them.
 187   ;;
 188   ;; There is no common convention for a file extension for gnatprep files.
 189
 190   (add-to-list 'completion-ignored-extensions ".ali") ;; gnat library files, used for cross reference
 191   (add-to-list 'compilation-error-regexp-alist 'gnat)
 192   )
 193
 194 (defun ada-gnat-xref-deselect-prj ()
 195   (setq ada-file-name-from-ada-name nil)
 196   (setq ada-ada-name-from-file-name nil)
 197   (setq ada-make-package-body       nil)
 198
 199   (setq ada-syntax-propertize-hook (delq 'gnatprep-syntax-propertize ada-syntax-propertize-hook))
 200   (setq ada-mode-hook (delq 'ada-gnat-xref-setup ada-mode-hook))
 201
 202   (setq ada-xref-other-function  nil)
 203   (setq ada-xref-parent-function nil)
 204   (setq ada-xref-all-function    nil)
 205
 206   (setq completion-ignored-extensions (delete ".ali" completion-ignored-extensions))
 207   (setq compilation-error-regexp-alist (delete 'gnat compilation-error-regexp-alist))
 208   )
 209
 210 (defun ada-gnat-xref-setup ()
 211   (when (boundp 'wisi-indent-calculate-functions)
 212     (add-to-list 'wisi-indent-calculate-functions 'gnatprep-indent))
 213   )
 214
 215 (defun ada-gnat-xref ()
 216   "Set Ada mode global vars to use 'gnat xref'"
 217   (add-to-list 'ada-prj-file-ext-extra     "gpr")
 218   (add-to-list 'ada-prj-parser-alist       '("gpr" . gnat-parse-gpr))
 219   (add-to-list 'ada-select-prj-xref-tool   '(gnat  . ada-gnat-xref-select-prj))
 220   (add-to-list 'ada-deselect-prj-xref-tool '(gnat  . ada-gnat-xref-deselect-prj))
 221
 222   ;; no parse-*-xref yet
 223
 224   (font-lock-add-keywords 'ada-mode
 225    ;; gnatprep preprocessor line
 226    (list (list "^[ \t]*\\(#.*\n\\)"  '(1 font-lock-type-face t))))
 227
 228   (add-hook 'ada-gnat-fix-error-hook 'ada-gnat-fix-error))
 229
 230 (ada-gnat-xref)
 231
 232 (provide 'ada-gnat-xref)
 233 (provide 'ada-xref-tool)
 234
 235 (unless (default-value 'ada-xref-tool)
 236   (set-default 'ada-xref-tool 'gnat))
 237
 238 ;; end of file