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;;; geiser-xref.el --- Utilities for cross-referencing -*- lexical-binding: t; -*-
;; Copyright (C) 2009, 2010, 2012, 2022 Jose Antonio Ortega Ruiz
;; This program is free software; you can redistribute it and/or
;; modify it under the terms of the Modified BSD License. You should
;; have received a copy of the license along with this program. If
;; not, see <http://www.xfree86.org/3.3.6/COPYRIGHT2.html#5>.
;; Start date: Thu Mar 05, 2009 23:03
;;; Code:
(require' geiser-edit)
(require 'geiser-autodoc)
(require 'geiser-eval)
(require 'geiser-popup)
(require 'geiser-custom)
(require 'geiser-base)
(require 'button)
(require 'lisp-mode)
;;; Customization:
(defgroup geiser-xref nil
"Options for cross-referencing commands."
:group 'geiser)
(geiser-edit--define-custom-visit
geiser-xref-follow-link-method geiser-xref
"How to visit buffers when following xrefs.")
(geiser-custom--defface xref-link
'link geiser-xref "links in cross-reference buffers")
(geiser-custom--defface xref-header
'bold geiser-xref "headers in cross-reference buffers")
;;; Buffer and mode:
(geiser-popup--define xref "*Geiser Xref*" geiser-xref-mode)
(defvar geiser-xref-mode-map
(let ((map (make-sparse-keymap)))
(suppress-keymap map)
(set-keymap-parent map button-buffer-map)
map)
"Keymap for `geiser-xref-mode'.")
(define-derived-mode geiser-xref-mode nil "Geiser Xref"
"Major mode for displaying cross-references.
\\{geiser-xref-mode-map}"
(buffer-disable-undo)
(set-syntax-table scheme-mode-syntax-table)
(setq buffer-read-only t))
;;; Ref button:
(define-button-type 'geiser-xref
'action 'geiser-xref--button-action
'face 'geiser-font-lock-xref-link
'follow-link t)
(defun geiser-xref--button-action (button)
(let ((location (button-get button 'location))
(name (button-get button 'name)))
(when location
(geiser-edit--try-edit-location name
location
geiser-xref-follow-link-method))))
(defun geiser-xref--insert-button (xref)
(let* ((location (cdr (assoc "location" xref)))
(file (geiser-edit--location-file location))
(signature (cdr (assoc "signature" xref)))
(signature-txt (and signature
(geiser-autodoc--str* signature)))
(p (point)))
(when signature
(insert " - ")
(if (stringp file)
(insert-text-button signature-txt
:type 'geiser-xref
'location location
'name (car signature)
'help-echo (format "%s in %s"
(car signature) file))
(insert (format "%s" signature-txt)))
(fill-region p (point))
(save-excursion (goto-char p) (indent-sexp))
(newline))))
(defun geiser-xref--module< (xr1 xr2)
(let ((m1 (format "%s" (cdr (assoc "module" xr1))))
(m2 (format "%s" (cdr (assoc "module" xr2)))))
(cond ((equal m1 m2)
(string< (format "%s" (cdr (assoc "signature" xr1)))
(format "%s" (cdr (assoc "signature" xr2)))))
((null m1) (not m2))
((null m2))
(t (string< (format "%s" m1) (format "%s" m2))))))
(defun geiser-xref--display-xrefs (header xrefs)
(geiser-xref--with-buffer
(erase-buffer)
(geiser--insert-with-face header 'geiser-font-lock-xref-header)
(newline)
(let ((last-module))
(dolist (xref (sort xrefs 'geiser-xref--module<))
(let ((module (format "%s" (cdr (assoc "module" xref)))))
(when (not (equal module last-module))
(insert "\n In module ")
(geiser--insert-with-face (format "%s" module)
'geiser-font-lock-xref-header)
(newline 2)
(setq last-module module))
(geiser-xref--insert-button xref)))))
(geiser-xref--pop-to-buffer)
(goto-char (point-min)))
(defun geiser-xref--read-name (ask prompt)
(let ((name (or (and (not ask) (geiser--symbol-at-point))
(read-string prompt nil nil (geiser--symbol-at-point)))))
(and name (format "%s" name))))
(defun geiser-xref--fetch-xrefs (ask kind rkind proc)
(let* ((name (geiser-xref--read-name ask (format "%s: " (capitalize kind))))
(res (and name (geiser-eval--send/result
`(:eval (:ge ,proc (quote (:scm ,name))))))))
(message "Retrieving %ss list for '%s'..." rkind name)
(if (or (not res) (not (listp res)))
(message "No %ss found for '%s'" rkind name)
(message "")
(geiser-xref--display-xrefs (format "%ss for '%s'"
(capitalize rkind)
name)
res))))
;;; Commands:
(defun geiser-xref-generic-methods (&optional arg)
"Display information about known methods of a given generic.
With prefix, ask for the name of the generic."
(interactive "P")
(geiser-xref--fetch-xrefs arg "generic" "method" 'generic-methods))
(defun geiser-xref-callers (&optional arg)
"Display list of callers for procedure at point.
With prefix, ask for the procedure."
(interactive "P")
(geiser-xref--fetch-xrefs arg "procedure" "caller" 'callers))
(defun geiser-xref-callees (&optional arg)
"Display list of callees for procedure at point.
With prefix, ask for the procedure."
(interactive "P")
(geiser-xref--fetch-xrefs arg "procedure" "callee" 'callees))
(provide 'geiser-xref)
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