(defvar iplayer-updating-cache-process nil) (defvar iplayer-updating-cache-sentinel-info nil) (defvar iplayer-updating-cache-sentinel-executing nil) (defun iplayer-updating-cache-sentinel (process event) ;; FIXME: assumes that all went well (let* ((iplayer-updating-cache-sentinel-executing t) (info (reverse iplayer-updating-cache-sentinel-info))) (setq iplayer-updating-cache-process nil iplayer-updating-cache-sentinel-info nil) (dolist (info info) (let ((iplayer-command-frame (car info)) (iplayer-command-window (cadr info)) (iplayer-command-buffer (caddr info)) (keys (car (cdddr info)))) (when (and (frame-live-p iplayer-command-frame) (window-live-p iplayer-command-window) (buffer-live-p iplayer-command-buffer)) (let ((old-frame (selected-frame)) (old-window (selected-window)) (old-buffer (current-buffer))) (let ((pre-command-hook (lambda () (select-frame iplayer-command-frame) (select-window iplayer-command-window) (set-buffer iplayer-command-buffer) (setq pre-command-hook nil)))) ;; KLUDGE: execute-kbd-macro executes a normal ;; command-loop, whose first action is to select the ;; current frame and window, which is why we contort ;; things to select the frame/window/buffer we actually ;; want in pre-command-hook. I'm actually surprised ;; that it works, but mine is not too much to reason ;; why; lots of other ways to try to achieve this didn't ;; in fact work. (execute-kbd-macro keys) ;; KLUDGE: and then we restore old state (select-window old-window) (select-frame old-frame) (set-buffer old-buffer)))))) (message "Done updating iPlayer cache"))) (defmacro define-iplayer-command (name arglist &rest body) (let (docstring interactive) (when (stringp (car body)) (setq docstring (car body) body (cdr body))) (when (and (consp (car body)) (eql (caar body) 'interactive)) (setq interactive (car body) body (cdr body))) `(defun ,name ,arglist ,@(when docstring (list docstring)) ,@(when interactive (list interactive)) (unless iplayer-updating-cache-process (setq iplayer-updating-cache-process (start-process "updating-iplayer" " *updating-iplayer*" "get-iplayer" "--type" "radio,tv" "-q")) (set-process-sentinel iplayer-updating-cache-process 'iplayer-updating-cache-sentinel) (message "Updating iPlayer cache")) (if iplayer-updating-cache-sentinel-executing (progn ,@body) (push (list (selected-frame) (selected-window) (current-buffer) (this-command-keys)) iplayer-updating-cache-sentinel-info))))) (defun get-iplayer-tree (&rest args) (with-temp-buffer (apply #'call-process "get-iplayer" nil t nil "--nocopyright" "--type" "radio,tv" "--tree" "--terse" args) (goto-char (point-min)) (let (result program episodes) (while (< (point) (point-max)) (cond ((looking-at "^\\w") (when (and program episodes) (push (cons program (reverse episodes)) result)) (setf program (buffer-substring (point) (progn (end-of-line) (point)))) (when (string-match "^\\(tv\\|radio\\), " program) (setq program (substring program (match-end 0)))) (setf episodes nil) (unless (= (point) (point-max)) (forward-char))) ((looking-at "^ \\([0-9]+\\):\\s-\\(.*\\)$") (let ((episode (cons (buffer-substring (match-beginning 1) (match-end 1)) (buffer-substring (match-beginning 2) (match-end 2))))) (when (string-match "^\\(tv\\|radio\\), " (cdr episode)) (rplacd episode (substring (cdr episode) (match-end 0)))) (push episode episodes)) (forward-line)) (t (forward-line)))) (reverse result)))) (defun display-iplayer-tree (tree) (with-current-buffer (get-buffer-create "*iplayer*") (delete-region (point-min) (point-max)) (iplayer-mode) (orgstruct-mode 1) (dolist (entry tree) (let ((program (car entry)) (episodes (cdr entry))) (insert (propertize (format "* %s\n" program) 'face 'outline-1)) (dolist (episode episodes) (insert (propertize (format "** %s\n" (cdr episode)) 'face 'outline-2 'iplayer-id (car episode)))))) (org-overview) (goto-char (point-min))) (switch-to-buffer (get-buffer-create "*iplayer*"))) (defvar iplayer-presets '(("1" . "BBC One") ("2" . "BBC Two") ("3" . "BBC Three") ("4" . "BBC Four") ("!" . "BBC Radio 1") ("\"" . "BBC Radio 2") ("£" . "BBC Radio 3") ("$" . "BBC Radio 4") ("%" . "BBC Radio 5 live") ("^" . "BBC 6 Music") ("&" . "BBC 7") ("*" . "BBC Radio 4 Extra")) "Alist mapping keys to iPlayer channels. Used in the `iplayer-preset' command.") (define-iplayer-command iplayer-preset (&optional prefix) "Switch display to a preset channel. The presets are defined in the variable `iplayer-presets'." (interactive "p") (let ((keys (this-command-keys)) (presets (mapcar (lambda (x) (cons (read-kbd-macro (car x)) (cdr x))) iplayer-presets))) (cond ((= (length keys) 1) (let ((channel (cdr (assoc keys presets)))) (if channel (progn (setq mode-line-process (format "[%s]" channel)) (iplayer-channel (format "^%s$" channel))) (error "no preset for key %s" keys))))))) (defun iplayer-channel (channel) (display-iplayer-tree (get-iplayer-tree "--channel" channel))) (defun iplayer-download () (interactive) (let ((id (get-text-property (point) 'iplayer-id))) (if id (let ((default-directory "~/iPlayer/")) ;; should probably use a process filter instead to give us a ;; progress bar (message "downloading id %s" id) (start-process "get-iplayer" " *get-iplayer*" "get-iplayer" "--get" (format "%s" id))) (message "no id at point")))) (defconst iplayer-mode-map (let ((map (make-sparse-keymap))) (define-key map (kbd "0") 'iplayer) (let ((presets "123456789!\"£$%^&*()")) (dotimes (i (length presets)) (define-key map (read-kbd-macro (substring presets i (1+ i))) 'iplayer-preset))) (define-key map (kbd "RET") 'iplayer-download) map )) (defun iplayer-mode () "A major mode for the BBC's iPlayer. \\{iplayer-mode-map}" (interactive) (use-local-map iplayer-mode-map) (setq major-mode 'iplayer-mode mode-name "iPlayer")) (define-iplayer-command iplayer () "Start the emacs iPlayer interface." (interactive) (setq mode-line-process nil) (display-iplayer-tree (get-iplayer-tree))) (provide 'iplayer)