170 lines
5.1 KiB
EmacsLisp
170 lines
5.1 KiB
EmacsLisp
;;; fuel-xref.el -- showing cross-reference info
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;; Copyright (C) 2008, 2009 Jose Antonio Ortega Ruiz
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;; See http://factorcode.org/license.txt for BSD license.
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;; Author: Jose Antonio Ortega Ruiz <jao@gnu.org>
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;; Keywords: languages, fuel, factor
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;; Start date: Sat Dec 20, 2008 22:00
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;;; Comentary:
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;; A mode and utilities for showing cross-reference information.
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;;; Code:
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(require 'fuel-help)
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(require 'fuel-eval)
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(require 'fuel-syntax)
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(require 'fuel-popup)
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(require 'fuel-font-lock)
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(require 'fuel-base)
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(require 'button)
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;;; Customization:
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(defgroup fuel-xref nil
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"FUEL's cross-referencing engine."
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:group 'fuel)
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(defcustom fuel-xref-follow-link-to-word-p t
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"Whether, when following a link to a caller, we position the
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cursor at the first ocurrence of the used word."
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:group 'fuel-xref
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:type 'boolean)
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(fuel-font-lock--defface fuel-font-lock-xref-link
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'link fuel-xref "highlighting links in cross-reference buffers")
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(fuel-font-lock--defface fuel-font-lock-xref-vocab
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'italic fuel-xref "vocabulary names in cross-reference buffers")
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;;; Buttons:
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(define-button-type 'fuel-xref--button-type
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'action 'fuel-xref--follow-link
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'follow-link t
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'face 'fuel-font-lock-xref-link)
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(defun fuel-xref--follow-link (button)
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(let ((file (button-get button 'file))
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(line (button-get button 'line)))
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(when (not file)
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(error "No file for this ref"))
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(when (not (file-readable-p file))
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(error "File '%s' is not readable" file))
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(let ((word fuel-xref--word))
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(find-file-other-window file)
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(when (numberp line) (goto-line line))
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(when (and word fuel-xref-follow-link-to-word-p)
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(and (search-forward word
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(fuel-syntax--end-of-defun-pos)
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t)
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(goto-char (match-beginning 0)))))))
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;;; The xref buffer:
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(fuel-popup--define fuel-xref--buffer
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"*fuel xref*" 'fuel-xref-mode)
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(make-local-variable (defvar fuel-xref--word nil))
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(defvar fuel-xref--help-string
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"(Press RET or click to follow crossrefs, or h for help on word at point)")
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(defun fuel-xref--title (word cc count)
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(put-text-property 0 (length word) 'font-lock-face 'bold word)
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(cond ((zerop count) (format "No known words %s %s" cc word))
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((= 1 count) (format "1 word %s %s:" cc word))
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(t (format "%s words %s %s:" count cc word))))
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(defun fuel-xref--insert-ref (ref)
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(when (and (stringp (first ref))
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(stringp (third ref))
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(numberp (fourth ref)))
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(insert " ")
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(insert-text-button (first ref)
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:type 'fuel-xref--button-type
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'help-echo (format "File: %s (%s)"
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(third ref)
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(fourth ref))
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'file (third ref)
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'line (fourth ref))
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(when (stringp (second ref))
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(insert (format " (in %s)" (second ref))))
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(newline)
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t))
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(defun fuel-xref--fill-buffer (word cc refs)
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(let ((inhibit-read-only t)
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(count 0))
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(with-current-buffer (fuel-xref--buffer)
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(erase-buffer)
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(dolist (ref refs)
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(when (fuel-xref--insert-ref ref) (setq count (1+ count))))
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(goto-char (point-min))
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(insert (fuel-xref--title word cc count) "\n\n")
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(when (> count 0)
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(setq fuel-xref--word (and cc word))
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(goto-char (point-max))
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(insert "\n" fuel-xref--help-string "\n"))
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(goto-char (point-min))
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count)))
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(defun fuel-xref--fill-and-display (word cc refs)
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(let ((count (fuel-xref--fill-buffer word cc refs)))
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(if (zerop count)
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(error (fuel-xref--title word cc 0))
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(message "")
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(fuel-popup--display (fuel-xref--buffer)))))
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(defun fuel-xref--show-callers (word)
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(let* ((cmd `(:fuel* (((:quote ,word) fuel-callers-xref))))
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(res (fuel-eval--retort-result (fuel-eval--send/wait cmd))))
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(fuel-xref--fill-and-display word "using" res)))
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(defun fuel-xref--show-callees (word)
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(let* ((cmd `(:fuel* (((:quote ,word) fuel-callees-xref))))
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(res (fuel-eval--retort-result (fuel-eval--send/wait cmd))))
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(fuel-xref--fill-and-display word "used by" res)))
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(defun fuel-xref--apropos (str)
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(let* ((cmd `(:fuel* ((,str fuel-apropos-xref))))
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(res (fuel-eval--retort-result (fuel-eval--send/wait cmd))))
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(fuel-xref--fill-and-display str "containing" res)))
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;;; Xref mode:
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(defun fuel-xref-show-help ()
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(interactive)
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(let ((fuel-help-always-ask nil))
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(fuel-help)))
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(defvar fuel-xref-mode-map
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(let ((map (make-sparse-keymap)))
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(suppress-keymap map)
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(set-keymap-parent map button-buffer-map)
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(define-key map "h" 'fuel-xref-show-help)
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map))
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(defun fuel-xref-mode ()
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"Mode for displaying FUEL cross-reference information.
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\\{fuel-xref-mode-map}"
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(interactive)
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(kill-all-local-variables)
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(buffer-disable-undo)
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(use-local-map fuel-xref-mode-map)
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(setq mode-name "FUEL Xref")
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(setq major-mode 'fuel-xref-mode)
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(font-lock-add-keywords nil '(("(in \\(.+\\))" 1 'fuel-font-lock-xref-vocab)))
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(setq buffer-read-only t))
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(provide 'fuel-xref)
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;;; fuel-xref.el ends here
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