122 lines
3.5 KiB
EmacsLisp
122 lines
3.5 KiB
EmacsLisp
;;; fuel-xref.el -- showing cross-reference info
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;; Copyright (C) 2008 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-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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;;; 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 'default)
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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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(find-file-other-window file)
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(when (numberp line) (goto-line line))))
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;;; The xref buffer:
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(defvar fuel-xref--buffer-name "*fuel xref*")
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(defun fuel-xref--get-buffer ()
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(let ((buffer (get-buffer fuel-xref--buffer-name)))
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(or (and (buffer-live-p buffer) buffer)
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(prog1
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(set-buffer (get-buffer-create fuel-xref--buffer-name))
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(fuel-xref-mode)))))
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(defvar fuel-xref--help-string "(Press RET or click to follow crossrefs)")
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(defun fuel-xref--fill-buffer (title refs)
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(let ((inhibit-read-only t))
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(with-current-buffer (fuel-xref--get-buffer)
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(erase-buffer)
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(insert title "\n\n")
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(dolist (ref refs)
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(when (and (first ref) (second ref) (numberp (third 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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(second ref)
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(third ref))
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'file (second ref)
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'line (third ref))
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(newline)))
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(when refs
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(insert "\n\n" fuel-xref--help-string "\n"))
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(goto-char (point-min)))))
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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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(title (format (if res "Callers of '%s':"
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"No callers found for '%s'")
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word)))
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(fuel-xref--fill-buffer title res)
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(pop-to-buffer (fuel-xref--get-buffer))))
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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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(title (format (if res "Words called by '%s':"
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"No callees found for '%s'")
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word)))
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(fuel-xref--fill-buffer title res)
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(pop-to-buffer (fuel-xref--get-buffer))))
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;;; Xref mode:
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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 "q" 'bury-buffer)
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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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(fuel-font-lock--font-lock-setup)
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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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