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;;; sesman-browser.el --- Interactive Browser for Sesman -*- lexical-binding: t -*-
;;
;; Copyright (C) 2018, Vitalie Spinu
;; Author: Vitalie Spinu
;; URL: https://github.com/vspinu/sesman
;;
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;;
;; This file is *NOT* part of GNU Emacs.
;;
;; This program 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 3, or
;; (at your option) any later version.
;;
;; This program 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 this program; see the file COPYING. If not, write to
;; the Free Software Foundation, Inc., 51 Franklin Street, Fifth
;; Floor, Boston, MA 02110-1301, USA.
;;
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;;
;;; Commentary:
;;
;; Interactive session browser.
;;
;;; Code:
(require 'seq)
(require 'sesman)
(defgroup sesman-browser nil
"Browser for Sesman."
:prefix "sesman-browser-"
:group 'sesman
:link '(url-link :tag "GitHub" "https://github.com/vspinu/sesman"))
(defface sesman-browser-highligh-face
'((default (:inherit highlight :weight bold)))
"Face used to highlight currently selected button."
:group 'sesman-browser)
(defface sesman-browser-button-face
'((default (:inherit button :slant italic)))
"Face used to highlight currently selected object."
:group 'sesman-browser)
(defvar-local sesman-browser--sort-types '(name relevance))
(defcustom sesman-browser-sort-type 'name
"Default sorting type in sesman browser buffers.
Currently can be either 'name or 'relevance."
:type '(choice (const name) (const relevance))
:group 'sesman-browser)
(defvar sesman-browser-map
(let (sesman-browser-map)
(define-prefix-command 'sesman-browser-map)
(define-key sesman-browser-map (kbd "r") #'sesman-browser-restart-session)
(define-key sesman-browser-map (kbd "q") #'sesman-browser-quit-session)
(define-key sesman-browser-map (kbd "b") #'sesman-browser-link-with-buffer)
(define-key sesman-browser-map (kbd "d") #'sesman-browser-link-with-directory)
(define-key sesman-browser-map (kbd "p") #'sesman-browser-link-with-project)
(define-key sesman-browser-map (kbd "u") #'sesman-browser-unlink)
sesman-browser-map)
"Prefix keymap for sesman commands from sesman browser.")
(defvar sesman-browser-mode-map
(let ((sesman-browser-mode-map (make-sparse-keymap)))
(define-key sesman-browser-mode-map (kbd "n") #'sesman-browser-vertical-next)
(define-key sesman-browser-mode-map (kbd "p") #'sesman-browser-vertical-prev)
(define-key sesman-browser-mode-map (kbd "f") #'sesman-browser-forward)
(define-key sesman-browser-mode-map (kbd "b") #'sesman-browser-backward)
(define-key sesman-browser-mode-map [remap forward-paragraph] #'sesman-browser-session-next)
(define-key sesman-browser-mode-map [remap backward-paragraph] #'sesman-browser-session-prev)
(define-key sesman-browser-mode-map (kbd "C-M-n") #'sesman-browser-session-next)
(define-key sesman-browser-mode-map (kbd "C-M-p") #'sesman-browser-session-prev)
(define-key sesman-browser-mode-map (kbd "<tab>") #'sesman-browser-forward)
(define-key sesman-browser-mode-map (kbd "<backtab>") #'sesman-browser-backward)
(define-key sesman-browser-mode-map (kbd "<RET>") #'sesman-goto)
(define-key sesman-browser-mode-map (kbd "o") #'sesman-show)
(define-key sesman-browser-mode-map (kbd "t") #'sesman-browser-toggle-sort)
(define-key sesman-browser-mode-map (kbd "S") #'sesman-browser-toggle-sort)
(define-key sesman-browser-mode-map (kbd "l b") #'sesman-browser-link-with-buffer)
(define-key sesman-browser-mode-map (kbd "l d") #'sesman-browser-link-with-directory)
(define-key sesman-browser-mode-map (kbd "l p") #'sesman-browser-link-with-project)
(define-key sesman-browser-mode-map (kbd "u") #'sesman-browser-unlink)
(define-key sesman-browser-mode-map (kbd "s") 'sesman-browser-map)
(define-key sesman-browser-mode-map (kbd "C-c C-s") 'sesman-browser-map)
sesman-browser-mode-map)
"Local keymap in `sesman-browser-mode'.")
;;; Utilities
(defun sesman-browser--closeby-pos (prop lax)
(or (when (get-text-property (point) prop)
(point))
(when (and (not (bobp))
(get-text-property (1- (point)) prop))
(1- (point)))
(when lax
(let ((next (save-excursion
(and
(goto-char (next-single-char-property-change (point) prop))
(get-text-property (point) prop)
(point))))
(prev (save-excursion
(and
(goto-char (previous-single-char-property-change (point) prop))
(not (bobp))
(get-text-property (1- (point)) prop)
(1- (point))))))
(if next
(if prev
(if (< (- (point) prev) (- next (point)))
prev
next)
next)
prev)))))
(defun sesman-browser--closeby-value (prop lax)
(when-let ((pos (sesman-browser--closeby-pos prop lax)))
(get-text-property pos prop)))
(defun sesman-browser-get (what &optional no-error lax)
"Get value of the property WHAT at point.
If NO-ERROR is non-nil, don't throw an error if no value has been found and
return nil. If LAX is non-nil, search nearby and return the closest value."
(when (derived-mode-p 'sesman-browser-mode)
(or (let ((prop (pcase what
('session :sesman-session)
('link :sesman-link)
('object :sesman-object)
(_ what))))
(sesman-browser--closeby-value prop 'lax))
(unless no-error
(user-error "No %s %s" what (if lax "nearby" "at point"))))))
;;; Navigation
(defvar-local sesman-browser--section-overlay nil)
(defvar-local sesman-browser--stop-overlay nil)
(when (fboundp 'define-fringe-bitmap)
(define-fringe-bitmap 'sesman-left-bar
[#b00001100] nil nil '(top t)))
(defun sesman-browser--next (prop)
(let ((pos (point)))
(goto-char (previous-single-char-property-change (point) prop))
(unless (get-text-property (point) prop)
(goto-char (previous-single-char-property-change (point) prop)))
(when (bobp)
(goto-char pos))))
(defun sesman-browser--prev (prop)
(let ((pos (point)))
(goto-char (next-single-char-property-change (point) prop))
(unless (get-text-property (point) prop)
(goto-char (next-single-char-property-change (point) prop)))
(when (eobp)
(goto-char pos))))
(defun sesman-browser-forward ()
"Go to next button."
(interactive)
(sesman-browser--prev :sesman-stop))
(defun sesman-browser-backward ()
"Go to previous button."
(interactive)
(sesman-browser--next :sesman-stop))
(defun sesman-browser-vertical-next ()
"Go to next button section or row."
(interactive)
(sesman-browser--prev :sesman-vertical-stop))
(defun sesman-browser-vertical-prev ()
"Go to previous button section or row."
(interactive)
(sesman-browser--next :sesman-vertical-stop))
(defun sesman-browser-session-next ()
"Go to next session."
(interactive)
(sesman-browser--prev :sesman-session-stop))
(defun sesman-browser-session-prev ()
"Go to previous session."
(interactive)
(sesman-browser--next :sesman-session-stop))
;;; Display
(defun sesman-goto (&optional no-switch)
"Go to most relevant buffer for session at point.
If NO-SWITCH is non-nil, only display the buffer."
(interactive "P")
(let ((object (get-text-property (point) :sesman-object)))
(if (and object (bufferp object))
(if no-switch
(display-buffer object)
(pop-to-buffer object))
(let* ((session (sesman-browser-get 'session))
(info (sesman-session-info (sesman--system) session))
(buffers (or (plist-get info :buffers)
(let ((objects (plist-get info :objects)))
(seq-filter #'bufferp objects)))))
(if buffers
(let ((most-recent-buf (seq-find (lambda (b)
(member b buffers))
(buffer-list))))
(if no-switch
(display-buffer most-recent-buf)
(pop-to-buffer most-recent-buf)))
(user-error "Cannot jump to session %s; it doesn't contain any buffers" (car session)))))))
(defun sesman-show ()
"Show the most relevant buffer for the session at point."
(interactive)
(sesman-goto 'no-switch))
(defun sesman-browser--sensor-function (&rest _ignore)
(let ((beg (or (when (get-text-property (point) :sesman-stop)
(if (get-text-property (1- (point)) :sesman-stop)
(previous-single-char-property-change (point) :sesman-stop)
(point)))
(next-single-char-property-change (point) :sesman-stop)))
(end (next-single-char-property-change (point) :sesman-stop)))
(move-overlay sesman-browser--stop-overlay beg end)
(when window-system
(let ((beg (get-text-property (point) :sesman-fragment-beg))
(end (get-text-property (point) :sesman-fragment-end)))
(when (and beg end)
(move-overlay sesman-browser--section-overlay beg end))))))
;;; Sesman UI
(defun sesman-browser-quit-session ()
"Quite session at point."
(interactive)
(sesman-quit (sesman-browser-get 'session)))
(defun sesman-browser-restart-session ()
"Restart session at point."
(interactive)
(sesman-restart (sesman-browser-get 'session)))
(defun sesman-browser-link-with-buffer ()
"Ask for buffer to link session at point to."
(interactive)
(let ((session (sesman-browser-get 'session)))
(sesman-link-with-buffer 'ask session)))
(defun sesman-browser-link-with-directory ()
"Ask for directory to link session at point to."
(interactive)
(let ((session (sesman-browser-get 'session)))
(sesman-link-with-directory 'ask session)))
(defun sesman-browser-link-with-project ()
"Ask for project to link session at point to."
(interactive)
(let ((session (sesman-browser-get 'session)))
(sesman-link-with-project 'ask session)))
(defun sesman-browser-unlink ()
"Unlink the link at point or ask for link to unlink."
(interactive)
(if-let ((link (sesman-browser-get 'link 'no-error)))
(sesman--unlink link)
(if-let ((links (sesman-links (sesman--system)
(sesman-browser-get 'session))))
(mapc #'sesman--unlink
(sesman--ask-for-link "Unlink: " links 'ask-all))
(user-error "No links for session %s" (car (sesman-browser-get 'session)))))
(run-hooks 'sesman-post-command-hook))
;;; Major Mode
(defun sesman-browser-revert (&rest _ignore)
"Refresh current browser buffer."
(let ((pos (point)))
(sesman-browser)
;; simple but not particularly reliable or useful
(goto-char (min pos (point-max)))))
(defun sesman-browser-revert-all (system)
"Refresh all Sesman SYSTEM browsers."
(mapc (lambda (b)
(with-current-buffer b
(when (and (derived-mode-p 'sesman-browser-mode)
(eq system (sesman--system)))
(sesman-browser-revert))))
(buffer-list)))
(defun sesman-browser--goto-stop (stop-value)
(let ((search t))
(goto-char (point-min))
(while search
(goto-char (next-single-char-property-change (point) :sesman-stop))
(if (eobp)
(progn (setq search nil)
(goto-char (next-single-char-property-change (point-min) :sesman-stop)))
(when (equal (get-text-property (point) :sesman-stop) stop-value)
(setq search nil))))))
(defun sesman-browser-toggle-sort ()
"Toggle sorting of sessions.
See `sesman-browser-sort-type' for the default sorting type."
(interactive)
(when (eq sesman-browser-sort-type
(car sesman-browser--sort-types))
(pop sesman-browser--sort-types))
(unless sesman-browser--sort-types
(setq-local sesman-browser--sort-types (default-value 'sesman-browser--sort-types)))
(setq sesman-browser-sort-type (pop sesman-browser--sort-types))
(let ((stop (sesman-browser-get :sesman-stop nil 'lax)))
(sesman-browser)
(sesman-browser--goto-stop stop)
(sesman-browser--sensor-function))
(message "Sorted by %s"
(propertize (symbol-name sesman-browser-sort-type) 'face 'bold)))
(define-derived-mode sesman-browser-mode special-mode "SesmanBrowser"
"Interactive view of Sesman sessions.
When applicable, system specific commands are locally bound to j when point is
on a session object."
;; ensure there is a sesman-system here
(sesman--system)
(delete-all-overlays)
(setq-local sesman-browser--stop-overlay (make-overlay (point) (point)))
(overlay-put sesman-browser--stop-overlay 'face 'sesman-browser-highligh-face)
(setq-local sesman-browser--section-overlay (make-overlay (point) (point)))
(when window-system
(let* ((fringe-spec '(left-fringe sesman-left-bar sesman-browser-highligh-face))
(dummy-string (propertize "|" 'display fringe-spec)))
(overlay-put sesman-browser--section-overlay 'line-prefix dummy-string)))
(add-hook 'sesman-post-command-hook 'sesman-browser-revert nil t)
(setq-local display-buffer-base-action '(nil . ((inhibit-same-window . t))))
(setq-local sesman-browser--sort-types (default-value 'sesman-browser--sort-types))
(setq-local revert-buffer-function #'sesman-browser-revert))
(defun sesman-browser--insert-session (system ses i)
(let ((ses-name (car ses))
(head-template "%17s")
beg end)
(setq beg (point))
;; session header
(insert (format "%3d: " i))
(insert (propertize (car ses)
:sesman-stop ses-name
:sesman-vertical-stop t
:sesman-session-stop t
'face 'bold
'cursor-sensor-functions (list #'sesman-browser--sensor-function)
'mouse-face 'highlight)
"\n")
;; links
(insert (format head-template "linked-to: "))
(let ((link-groups (sesman-grouped-links system ses))
(vert-stop))
(dolist (grp link-groups)
(let* ((type (car grp)))
(dolist (link (cdr grp))
(when (> (current-column) fill-column)
(insert "\n" (format head-template " "))
(setq vert-stop nil))
(let ((val (sesman--abbrev-path-maybe (sesman--lnk-value link))))
(insert (propertize (sesman--format-context type val 'sesman-browser-button-face)
:sesman-stop (car link)
:sesman-vertical-stop (unless vert-stop (setq vert-stop t))
:sesman-link link
'cursor-sensor-functions (list #'sesman-browser--sensor-function)
'mouse-face 'highlight)))
(insert " ")))))
(insert "\n")
;; objects
(insert (format head-template "objects: "))
(let* ((info (sesman-session-info system ses))
(map (plist-get info :map))
(objects (plist-get info :objects))
(strings (or (plist-get info :strings)
(mapcar (lambda (x) (format "%s" x)) objects)))
(kvals (seq-mapn #'cons objects strings))
(kvals (seq-sort (lambda (a b) (string-lessp (cdr a) (cdr b)))
kvals))
(vert-stop))
(dolist (kv kvals)
(when (> (current-column) fill-column)
(insert "\n" (format head-template " "))
(setq vert-stop nil))
(let ((str (replace-regexp-in-string ses-name "%s" (cdr kv) nil t)))
(insert (propertize str
:sesman-stop str
:sesman-vertical-stop (unless vert-stop (setq vert-stop t))
:sesman-object (car kv)
'cursor-sensor-functions (list #'sesman-browser--sensor-function)
'face 'sesman-browser-button-face
'mouse-face 'highlight
'help-echo "mouse-2: visit in other window"
'keymap map)
" "))))
;; session properties
(setq end (point))
(put-text-property beg end :sesman-session ses)
(put-text-property beg end :sesman-session-name ses-name)
(put-text-property beg end :sesman-fragment-beg beg)
(put-text-property beg end :sesman-fragment-end end)
(insert "\n\n")))
;;;###autoload
(defun sesman-browser ()
"Display an interactive session browser.
See `sesman-browser-mode' for more details."
(interactive)
(let* ((system (sesman--system))
(pop-to (called-interactively-p 'any))
(sessions (sesman-sessions system))
(cur-session (when pop-to
(sesman-current-session 'CIDER)))
(buff (get-buffer-create (format "*sesman %s browser*" system))))
(with-current-buffer buff
(setq-local sesman-system system)
(sesman-browser-mode)
(cursor-sensor-mode 1)
(let ((inhibit-read-only t)
(sessions (pcase sesman-browser-sort-type
('name (seq-sort (lambda (a b) (string-greaterp (car b) (car a)))
sessions))
('relevance (sesman--sort-sessions system sessions))
(_ (error "Invalid `sesman-browser-sort-type'"))))
(i 0))
(erase-buffer)
(insert "\n ")
(insert (propertize (format "%s Sessions:" system)
'face '(bold font-lock-keyword-face)))
(insert "\n\n")
(dolist (ses sessions)
(setq i (1+ i))
(sesman-browser--insert-session system ses i))
(when pop-to
(pop-to-buffer buff)
(sesman-browser--goto-stop (car cur-session)))
(sesman-browser--sensor-function)))))
(provide 'sesman-browser)
;;; sesman-browser.el ends here