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|
;;; haskell-presentation-mode.el --- Presenting Haskell things -*- lexical-binding: t -*-
;; Copyright (C) 2013 Chris Done
;; Author: Chris Done <chrisdone@gmail.com>
;; This file is not part of GNU Emacs.
;; This file 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 file 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 GNU Emacs; see the file COPYING. If not, write to
;; the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
;; Boston, MA 02110-1301, USA.
;;; Commentary:
;;; Code:
(require 'haskell-mode)
(require 'haskell-session)
(defvar haskell-presentation-mode-map
(let ((map (make-sparse-keymap)))
(define-key map (kbd "q") 'quit-window)
(define-key map (kbd "c") 'haskell-presentation-clear)
map)
"Keymap for `haskell-presentation-mode'.")
(define-derived-mode haskell-presentation-mode
haskell-mode "Presentation"
"Major mode for viewing Haskell snippets.
\\{hypertext-mode-map}"
(setq case-fold-search nil))
(defconst haskell-presentation-buffer-name
"*Haskell Presentation*"
"Haskell Presentation buffer name.")
(defconst haskell-presentation-hint-message
"-- Hit `q' to close this window; `c' to clear.\n\n"
"Hint message appered in Haskell Presentation buffer.")
(defun haskell-presentation-buffer ()
"Return Haskell Presentaion buffer.
Return current presenation buffer or create new one if absent.
Never returns nil."
;; TODO Provide interactive calling options: when called interactively make
;; the presentation buffer current.
(let ((may-buffer (get-buffer haskell-presentation-buffer-name)))
(if may-buffer
may-buffer
(let ((buffer (generate-new-buffer haskell-presentation-buffer-name)))
(with-current-buffer buffer
(insert haskell-presentation-hint-message)
(haskell-presentation-mode)
(setq buffer-read-only t))
buffer))))
(defun haskell-presentation-clear ()
"Clear Haskell Presentation buffer."
(interactive)
(let ((hp-buf (get-buffer haskell-presentation-buffer-name)))
(when hp-buf
(with-current-buffer hp-buf
(let ((buffer-read-only nil))
(erase-buffer)
(insert haskell-presentation-hint-message))))))
(defun haskell-presentation-present (session code &optional clear)
"Present given code in a popup buffer.
Creates temporal Haskell Presentation buffer and assigns it to
given haskell SESSION; presented CODE will be fontified as
haskell code. Give an optional non-nil CLEAR arg to clear the
buffer before presenting message."
(let ((buffer (haskell-presentation-buffer)))
(with-current-buffer buffer
(when (boundp 'shm-display-quarantine)
(setq-local shm-display-quarantine nil))
(when clear (haskell-presentation-clear))
(haskell-session-assign session)
(goto-char (point-min))
(forward-line 2)
(save-excursion
(let ((buffer-read-only nil))
(insert code "\n\n"))))
(if (eq major-mode 'haskell-presentation-mode)
(switch-to-buffer buffer)
(pop-to-buffer buffer))))
(provide 'haskell-presentation-mode)
;;; haskell-presentation-mode.el ends here
|
