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twittering-mode.el
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twittering-mode.el
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;;; -*- indent-tabs-mode: t; tab-width: 8 -*-
;;;
;;; twittering-mode.el --- Major mode for Twitter
;; Copyright (C) 2007, 2009, 2010 Yuto Hayamizu.
;; 2008 Tsuyoshi CHO
;; Author: Y. Hayamizu <y.hayamizu@gmail.com>
;; Tsuyoshi CHO <Tsuyoshi.CHO+develop@Gmail.com>
;; Alberto Garcia <agarcia@igalia.com>
;; Created: Sep 4, 2007
;; Version: HEAD
;; Identity: $Id$
;; Keywords: twitter web
;; URL: http://twmode.sf.net/
;; 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 2, 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., 59 Temple Place - Suite 330,
;; Boston, MA 02111-1307, USA.
;;; Commentary:
;; twittering-mode.el is a major mode for Twitter.
;; You can check friends timeline, and update your status on Emacs.
;;; Feature Request:
;; URL : http://twitter.com/d00dle/statuses/577876082
;; * Status Input from Popup buffer and C-cC-c to POST.
;; URL : http://code.nanigac.com/source/view/419
;; * update status for region
;;; Code:
(eval-when-compile (require 'cl))
(require 'xml)
(require 'parse-time)
(when (> 22 emacs-major-version)
(add-to-list 'load-path
(expand-file-name
"url-emacs21" (if load-file-name
(or (file-name-directory load-file-name)
".")
".")))
(and (require 'un-define nil t)
;; the explicitly require 'unicode to update a workaround with
;; navi2ch. see a comment of `twittering-ucs-to-char' for more
;; details.
(require 'unicode nil t))
(set-terminal-coding-system 'utf-8))
(require 'url)
(defconst twittering-mode-version "HEAD")
(defconst twittering-mode-identity "$Id$")
(defvar twittering-api-host "api.twitter.com")
(defvar twittering-api-search-host "search.twitter.com")
(defvar twittering-web-host "twitter.com")
(defun twittering-mode-version ()
"Display a message for twittering-mode version."
(interactive)
(let ((version-string
(format "twittering-mode-v%s" twittering-mode-version)))
(if (interactive-p)
(message "%s" version-string)
version-string)))
(defconst twittering-max-number-of-tweets-on-retrieval 200
"The maximum number of `twittering-number-of-tweets-on-retrieval'.")
(defvar twittering-number-of-tweets-on-retrieval 20
"*The number of tweets which will be retrieved in one request.
The upper limit is `twittering-max-number-of-tweets-on-retrieval'.")
(defvar twittering-tinyurl-service 'tinyurl
"The service to use. One of 'tinyurl' or 'toly'.")
(defvar twittering-tinyurl-services-map
'((tinyurl . "http://tinyurl.com/api-create.php?url=")
(toly . "http://to.ly/api.php?longurl="))
"Alist of tinyfy services.")
(defvar twittering-mode-map (make-sparse-keymap))
(defvar twittering-tweet-history nil)
(defvar twittering-user-history nil)
(defvar twittering-timeline-history nil)
(defvar twittering-hashtag-history nil)
(defvar twittering-search-history nil)
(defvar twittering-current-hashtag nil
"A hash tag string currently set. You can set it by calling
`twittering-set-current-hashtag'.")
(defvar twittering-timer nil
"Timer object for timeline refreshing will be stored here.
DO NOT SET VALUE MANUALLY.")
(defvar twittering-timer-interval 90
"The interval of auto reloading. You should use 60 or more
seconds for this variable because the number of API call is
limited by the hour.")
(defvar twittering-timer-for-redisplaying nil
"Timer object for timeline redisplay statuses will be stored here.
DO NOT SET VALUE MANUALLY.")
(defvar twittering-timer-interval-for-redisplaying 17
"The interval of auto redisplaying statuses.")
(defvar twittering-username nil
"*An username of your Twitter account.")
(defvar twittering-password nil
"*A password of your Twitter account. Leave it blank is the
recommended way because writing a password in .emacs file is so
dangerous.")
(defvar twittering-initial-timeline-spec-string ":home"
"*The initial timeline spec string. If the value of the variable is a
list of timeline spec strings, the timelines are rendered on their own
buffers.")
(defvar twittering-timeline-spec nil
"The timeline spec for the current buffer.")
(defvar twittering-timeline-spec-string ""
"The timeline spec string for the current buffer.")
(defvar twittering-timeline-spec-alias nil
"*Alist for aliases of timeline spec.
Each element is (NAME . SPEC-STRING), where NAME is a string and
SPEC-STRING is a string or a function that returns a timeline spec string.
The alias can be referred as \"$NAME\" or \"$NAME(ARG)\" in timeline spec
string. If SPEC-STRING is a string, ARG is simly ignored.
If SPEC-STRING is a function, it is called with a string argument.
For the style \"$NAME\", the function is called with nil.
For the style \"$NAME(ARG)\", the function is called with a string ARG.
For example, if you specify
'((\"FRIENDS\" . \"(USER1+USER2+USER3)\")
(\"to_me\" . \"(:mentions+:retweets_of_me+:direct_messages)\")
(\"related-to\" .
,(lambda (username)
(if username
(format \":search/to:%s OR from:%s OR @%s/\"
username username username)
\":home\")))),
then you can use \"$to_me\" as
\"(:mentions+:retweets_of_me+:direct_messages)\".")
(defvar twittering-current-timeline-spec-string nil
"The current timeline spec string. This variable should not be referred
directly. Use `twittering-current-timeline-spec-string' or
`twittering-current-timeline-spec'.")
(defvar twittering-list-index-retrieved nil)
(defvar twittering-process-info-alist nil
"Alist of active process and timeline spec retrieved by the process.")
(defvar twittering-server-info-alist nil
"Alist of server information.")
(defvar twittering-new-tweets-count 0
"Number of new tweets when `twittering-new-tweets-hook' is run.")
(defvar twittering-new-tweets-spec nil
"Timeline spec, which new tweets belong to, when
`twittering-new-tweets-hook' is run.")
(defvar twittering-new-tweets-hook nil
"*Hook run when new tweets are received.
You can read `twittering-new-tweets-count' or `twittering-new-tweets-spec'
to get the number of new tweets received when this hook is run.")
(defvar twittering-active-mode nil
"Non-nil if new statuses should be retrieved periodically.
Do not modify this variable directly. Use `twittering-activate-buffer',
`twittering-deactivate-buffer', `twittering-toggle-activate-buffer' or
`twittering-set-active-flag-for-buffer'.")
(defvar twittering-scroll-mode nil)
(defvar twittering-jojo-mode nil)
(defvar twittering-reverse-mode nil
"*Non-nil means tweets are aligned in reverse order of `http://twitter.com/'.")
(defvar twittering-display-remaining nil
"*If non-nil, display remaining of rate limit on the mode line.")
(defvar twittering-status-format "%i %s, %@:\n%FILL{ %T // from %f%L%r%R}\n "
"Format string for rendering statuses.
Ex. \"%i %s, %@:\\n%FILL{ %T // from %f%L%r%R}\n \"
Items:
%s - screen_name
%S - name
%i - profile_image
%d - description
%l - location
%L - \" [location]\"
%r - \" sent to user\" (use on direct_messages{,_sent})
%r - \" in reply to user\" (use on other standard timeline)
%R - \" (retweeted by user)\"
%u - url
%j - user.id
%p - protected?
%c - created_at (raw UTC string)
%C{time-format-str} - created_at (formatted with time-format-str)
%@ - X seconds ago
%T - raw text
%t - text filled as one paragraph
%' - truncated
%FACE[face-name]{...} - strings decorated with the specified face.
%FILL{...} - strings filled as a paragrah.
You can use any other specifiers in braces.
%f - source
%# - id
")
(defvar twittering-retweet-format "RT: %t (via @%s)"
"Format string for retweet.
Items:
%s - screen_name
%t - text
%% - %
")
(defvar twittering-fill-column nil
"*The fill-column used for \"%FILL{...}\" in `twittering-status-format'.
If nil, the fill-column is automatically calculated.")
(defvar twittering-show-replied-tweets t
"*The number of replied tweets which will be showed in one tweet.
If the value is not a number and is non-nil, show all replied tweets
which is already fetched.
If the value is nil, doesn't show replied tweets.")
(defvar twittering-default-show-replied-tweets nil
"*The number of default replied tweets which will be showed in one tweet.
This value will be used only when showing new tweets.
See `twittering-show-replied-tweets' for more details.")
(defvar twittering-use-show-minibuffer-length t
"*Show current length of minibuffer if this variable is non-nil.
We suggest that you should set to nil to disable the showing function
when it conflict with your input method (such as AquaSKK, etc.)")
(defvar twittering-notify-successful-http-get t)
(defvar twittering-use-ssl t
"Use SSL connection if this variable is non-nil.
SSL connections use 'curl' command as a backend.")
(defvar twittering-curl-program nil
"Cache a result of `twittering-find-curl-program'.
DO NOT SET VALUE MANUALLY.")
(defvar twittering-connection-type-order '(curl native))
"*A list of connection methods in the preferred order."
(defvar twittering-connection-type-table
'((native (check . t)
(https . nil)
(start . twittering-start-http-session-native))
(curl (check . twittering-start-http-session-curl-p)
(https . twittering-start-http-session-curl-https-p)
(start . twittering-start-http-session-curl)))
"A list of alist of connection methods.")
(defvar twittering-format-status-function-source ""
"The status format string that has generated the current
`twittering-format-status-function'.")
(defvar twittering-format-status-function nil
"The formating function generated from `twittering-format-status-function-source'.")
(defvar twittering-timeline-data-table (make-hash-table :test 'equal))
(defvar twittering-username-face 'twittering-username-face)
(defvar twittering-uri-face 'twittering-uri-face)
(defvar twittering-use-native-retweet nil
"Post retweets using native retweets if this variable is non-nil.")
(defvar twittering-update-status-function
'twittering-update-status-from-minibuffer
"The function used to posting a tweet. It takes two arguments:
the first argument INIT-STR is initial text to be edited and the
second argument REPLY-TO-ID is a user ID of a tweet to which you
are going to reply.
Twittering-mode provides two functions for updating status:
* `twittering-update-status-from-minibuffer': edit tweets in minibuffer
* `twittering-update-status-from-pop-up-buffer': edit tweets in pop-up buffer")
;;;
;;; Proxy setting / functions
;;;
(defvar twittering-proxy-use nil)
(defvar twittering-proxy-keep-alive nil)
(defvar twittering-proxy-server nil
"*The proxy server for `twittering-mode'.
If nil, it is initialized on entering `twittering-mode'.
The port number is specified by `twittering-proxy-port'.")
(defvar twittering-proxy-port nil
"*The port number of a proxy server for `twittering-mode'.
If nil, it is initialized on entering `twittering-mode'.
The server is specified by `twittering-proxy-server'.")
(defvar twittering-proxy-user nil)
(defvar twittering-proxy-password nil)
(defun twittering-find-proxy (scheme)
"Find proxy server and its port for `twittering-mode' and returns
a cons pair of them.
SCHEME must be \"http\" or \"https\"."
(cond
((require 'url-methods nil t)
(url-scheme-register-proxy scheme)
(let* ((proxy-service (assoc scheme url-proxy-services))
(proxy (if proxy-service (cdr proxy-service) nil)))
(if (and proxy
(string-match "^\\([^:]+\\):\\([0-9]+\\)$" proxy))
(let ((host (match-string 1 proxy))
(port (string-to-number (match-string 2 proxy))))
(cons host port))
nil)))
(t
(let* ((env-var (concat scheme "_proxy"))
(env-proxy (or (getenv (upcase env-var))
(getenv (downcase env-var))))
(default-port (if (string= "https" scheme) "443" "80")))
(if (and env-proxy
(string-match
"^\\(https?://\\)?\\([^:/]+\\)\\(:\\([0-9]+\\)\\)?/?$"
env-proxy))
(let* ((host (match-string 2 env-proxy))
(port-str (or (match-string 4 env-proxy) default-port))
(port (string-to-number port-str)))
(cons host port))
nil)))))
(defun twittering-setup-proxy ()
(when (require 'url-methods nil t)
;; If `url-scheme-registry' is not initialized,
;; `url-proxy-services' will be reset by calling
;; `url-insert-file-contents' or `url-retrieve-synchronously', etc.
;; To avoid it, initialize `url-scheme-registry' by calling
;; `url-scheme-get-property' before calling such functions.
(url-scheme-get-property "http" 'name)
(url-scheme-get-property "https" 'name))
(unless (and twittering-proxy-server twittering-proxy-port)
(let ((proxy-info (or (if twittering-use-ssl
(twittering-find-proxy "https"))
(twittering-find-proxy "http"))))
(when proxy-info
(let ((host (car proxy-info))
(port (cdr proxy-info)))
(setq twittering-proxy-server host)
(setq twittering-proxy-port port)))))
(if (and twittering-proxy-use
(null twittering-proxy-server)
(null twittering-proxy-port))
(progn
(message "Disabling proxy due to lack of configuration.")
(setq twittering-proxy-use nil))
t))
(defun twittering-toggle-proxy ()
(interactive)
(setq twittering-proxy-use
(not twittering-proxy-use))
(if (twittering-setup-proxy)
(message (if twittering-proxy-use "Use Proxy:on" "Use Proxy:off")))
(twittering-update-mode-line))
;;;
;;; to show image files
;;;
(defvar twittering-icon-mode nil
"You MUST NOT CHANGE this variable directly.
You should change through function `twittering-icon-mode'.")
(defun twittering-icon-mode (&optional arg)
"Toggle display of icon images on timelines.
With a numeric argument, if the argument is positive, turn on
icon mode; otherwise, turn off icon mode."
(interactive "P")
(let ((prev-mode twittering-icon-mode))
(setq twittering-icon-mode
(if (null arg)
(not twittering-icon-mode)
(< 0 (prefix-numeric-value arg))))
(unless (eq prev-mode twittering-icon-mode)
(twittering-update-mode-line)
(twittering-render-timeline (current-buffer)))))
(defvar twittering-image-data-table (make-hash-table :test 'equal))
(defvar twittering-image-stack nil)
(defvar twittering-image-type-cache nil)
(defvar twittering-convert-program (executable-find "convert"))
(defvar twittering-convert-fix-size 48)
(defvar twittering-use-convert (not (null twittering-convert-program))
"*This variable makes a sense only if `twittering-convert-fix-size'
is non-nil. If this variable is non-nil, icon images are converted by
invoking \"convert\". Otherwise, cropped images are displayed.")
(defun twittering-image-type (image-url buffer)
"Return the type of a given image based on the URL (IMAGE-URL)
and its contents (BUFFER)"
(let ((type-cache (assoc image-url twittering-image-type-cache))
(case-fold-search t))
(if type-cache
(cdr type-cache)
(let ((image-type (image-type-from-data (buffer-string))))
(add-to-list 'twittering-image-type-cache `(,image-url . ,image-type))
image-type))))
;;;
;;; Utility functions
;;;
(defun twittering-get-or-generate-buffer (buffer)
(if (bufferp buffer)
(if (buffer-live-p buffer)
buffer
(generate-new-buffer (buffer-name buffer)))
(if (stringp buffer)
(or (get-buffer buffer)
(generate-new-buffer buffer)))))
(defun twittering-get-status-url (username &optional id)
"Generate status URL."
(if id
(format "http://%s/%s/status/%s" twittering-web-host username id)
(format "http://%s/%s" twittering-web-host username)))
(defun twittering-get-search-url (query-string)
(format "http://%s/search?q=%s"
twittering-web-host (twittering-percent-encode query-string)))
(defun twittering-user-agent-default-function ()
"Twittering mode default User-Agent function."
(format "Emacs/%d.%d Twittering-mode/%s"
emacs-major-version emacs-minor-version
twittering-mode-version))
(defvar twittering-sign-simple-string nil)
(defun twittering-sign-string-default-function ()
"Append sign string to tweet."
(if twittering-sign-simple-string
(format " [%s]" twittering-sign-simple-string)
""))
(defvar twittering-user-agent-function 'twittering-user-agent-default-function)
(defvar twittering-sign-string-function 'twittering-sign-string-default-function)
(defun twittering-user-agent ()
"Return User-Agent header string."
(funcall twittering-user-agent-function))
(defun twittering-sign-string ()
"Return Tweet sign string."
(funcall twittering-sign-string-function))
(defun twittering-mode-line-buffer-identification ()
(let ((active-mode-indicator
(if twittering-active-mode
twittering-modeline-active
twittering-modeline-inactive))
(enabled-options
`(,@(when twittering-use-ssl `(,twittering-modeline-ssl))
,@(when twittering-jojo-mode '("jojo"))
,@(when twittering-icon-mode '("icon"))
,@(when twittering-reverse-mode '("reverse"))
,@(when twittering-scroll-mode '("scroll"))
,@(when twittering-proxy-use '("proxy")))))
(concat active-mode-indicator
(when twittering-display-remaining
(format " %d/%d"
(twittering-get-ratelimit-remaining)
(twittering-get-ratelimit-limit)))
(when enabled-options
(concat "[" (mapconcat 'identity enabled-options " ") "]")))))
(defun twittering-update-mode-line ()
"Update mode line."
(force-mode-line-update))
(defun twittering-status-id< (id1 id2)
(let ((len1 (length id1))
(len2 (length id2)))
(cond
((= len1 len2) (string< id1 id2))
((< len1 len2) t)
(t nil))))
(defun twittering-status-id= (id1 id2)
(equal id1 id2))
(defun twittering-fill-string (str &optional adjustment)
(when (and (not (boundp 'kinsoku-limit))
enable-kinsoku)
;; `kinsoku-limit' is defined on loading "international/kinsoku.el".
;; Without preloading, "kinsoku.el" will be loaded by auto-loading
;; triggered by `fill-region-as-paragraph'.
;; In that case, the local binding of `kinsoku-limit' conflicts the
;; definition by `defvar' in "kinsoku.el".
;; The below warning is displayed;
;; "Warning: defvar ignored because kinsoku-limit is let-bound".
;; So, we load "kinsoku.el" in advance if necessary.
(load "international/kinsoku"))
(let* ((kinsoku-limit 1)
(adjustment (+ (or adjustment 0)
(if (and (boundp 'fill-prefix) (stringp fill-prefix))
(string-width fill-prefix)
0)
(if enable-kinsoku
kinsoku-limit
0)))
(min-width
(apply 'min
(or
(mapcar 'window-width
(get-buffer-window-list (current-buffer) nil t))
;; Use `(frame-width)' if no windows display
;; the current buffer.
`(,(frame-width)))))
(temporary-fill-column (- (or twittering-fill-column (1- min-width))
adjustment)))
(with-temp-buffer
(let ((fill-column temporary-fill-column))
(insert str)
(fill-region-as-paragraph (point-min) (point-max))
(buffer-substring (point-min) (point-max))))))
(defun twittering-set-window-end (window pos)
(let* ((height (window-text-height window))
(n (- (- height 1))))
(while (progn (setq n (1+ n))
(set-window-start
window
(with-current-buffer (window-buffer window)
(save-excursion
(goto-char pos)
(line-beginning-position n))))
(not (pos-visible-in-window-p pos window))))))
(defun twittering-make-passed-time-string
(beg end encoded-created-at &optional additional-properties)
(let* ((now (current-time))
(secs (+ (* (- (car now) (car encoded-created-at)) 65536)
(- (cadr now) (cadr encoded-created-at))))
(time-string
(cond
((< secs 5) "less than 5 seconds ago")
((< secs 10) "less than 10 seconds ago")
((< secs 20) "less than 20 seconds ago")
((< secs 30) "half a minute ago")
((< secs 60) "less than a minute ago")
((< secs 150) "1 minute ago")
((< secs 2400) (format "%d minutes ago"
(/ (+ secs 30) 60)))
((< secs 5400) "about 1 hour ago")
((< secs 84600) (format "about %d hours ago"
(/ (+ secs 1800) 3600)))
(t (format-time-string "%I:%M %p %B %d, %Y"
encoded-created-at))))
(properties (append additional-properties
(and beg (text-properties-at beg)))))
;; Restore properties.
(when properties
(add-text-properties 0 (length time-string) properties time-string))
(if (< secs 84600)
(put-text-property 0 (length time-string)
'need-to-be-updated
`(twittering-make-passed-time-string
,encoded-created-at)
time-string)
;; Remove the property required no longer.
(remove-text-properties 0 (length time-string) '(need-to-be-updated nil)
time-string))
time-string))
(defun twittering-update-filled-string (beg end formater status prefix)
(let* ((str (twittering-fill-string (funcall formater status prefix)
(length prefix)))
(next (next-single-property-change 0 'need-to-be-updated str))
(properties
(and beg
(apply 'append
(mapcar (lambda (prop)
(let ((value (get-text-property beg prop)))
(when value
`(,prop ,value))))
'(id text username))))))
;; Restore properties.
(when properties
(add-text-properties 0 (length str) properties str))
(if (or (get-text-property 0 'need-to-be-updated str)
(and next (< next (length str))))
(put-text-property 0 (length str) 'need-to-be-updated
`(twittering-update-filled-string
,formater ,status ,prefix)
str)
;; Remove the property required no longer.
(remove-text-properties 0 (length str) '(need-to-be-updated nil) str))
str))
;;;
;;; Utility functions for portability
;;;
(defun twittering-ucs-to-char (num)
;; Check (featurep 'unicode) is a workaround with navi2ch to avoid
;; error "error in process sentinel: Cannot open load file:
;; unicode".
;;
;; Details: navi2ch prior to 1.8.3 (which is currently last release
;; version as of 2010-01-18) always define `ucs-to-char' as autoload
;; file "unicode(.el)" (which came from Mule-UCS), hence it breaks
;; `ucs-to-char' under non Mule-UCS environment. The problem is
;; fixed in navi2ch dated 2010-01-16 or later, but not released yet.
(if (and (featurep 'unicode) (functionp 'ucs-to-char))
(ucs-to-char num)
;; Emacs21 have a partial support for UTF-8 text, so it can decode
;; only parts of a text with Japanese.
(or (decode-char 'ucs num)
??)))
(defun twittering-remove-duplicates (list)
"Return a copy of LIST with all duplicate elements removed.
This is non-destructive version of `delete-dups' which is not
defined in Emacs21."
(if (fboundp 'delete-dups)
(delete-dups (copy-sequence list))
(let ((rest list)
(result nil))
(while rest
(unless (member (car rest) result)
(setq result (cons (car rest) result)))
(setq rest (cdr rest)))
(nreverse result))))
(defun twittering-completing-read (prompt collection &optional predicate require-match initial-input hist def inherit-input-method)
"Read a string in the minibuffer, with completion.
This is a modified version of `completing-read' and accepts candidates
as a list of a string on Emacs21."
;; completing-read() of Emacs21 does not accepts candidates as
;; a list. Candidates must be given as an alist.
(let* ((collection (twittering-remove-duplicates collection))
(collection
(if (and (> 22 emacs-major-version)
(listp collection)
(stringp (car collection)))
(mapcar (lambda (x) (cons x nil)) collection)
collection)))
(completing-read prompt collection predicate require-match
initial-input hist def inherit-input-method)))
(eval-when-compile ;; shut up the byte compiler.
(defvar twittering-debug-buffer)
(defvar twittering-edit-buffer))
(defun twittering-buffer-related-p ()
"Return t if current buffer is twittering-mode related buffer."
(or (twittering-buffer-p)
(member (buffer-name (current-buffer))
(list twittering-debug-buffer
twittering-edit-buffer))))
(defun assocref (item alist)
(cdr (assoc item alist)))
(defmacro list-push (value listvar)
`(setq ,listvar (cons ,value ,listvar)))
(defmacro case-string (str &rest clauses)
`(cond
,@(mapcar
(lambda (clause)
(let ((keylist (car clause))
(body (cdr clause)))
`(,(if (listp keylist)
`(or ,@(mapcar (lambda (key) `(string-equal ,str ,key))
keylist))
't)
,@body)))
clauses)))
(defvar twittering-regexp-hash
(let ((full-width-number-sign (twittering-ucs-to-char #xff03)))
;; Unicode Character 'FULLWIDTH NUMBER SIGN' (U+FF03)
(concat "\\(?:#\\|" (char-to-string full-width-number-sign) "\\)")))
(defvar twittering-regexp-atmark
(let ((full-width-commercial-at (twittering-ucs-to-char #xff20)))
;; Unicode Character 'FULLWIDTH COMMERCIAL AT' (U+FF20)
(concat "\\(?:@\\|" (char-to-string full-width-commercial-at) "\\)")))
;;;
;;; Timeline spec functions
;;;
;;; Timeline spec as S-expression
;;; - (user USER): timeline of the user whose name is USER. USER is a string.
;;; - (list USER LIST):
;;; the list LIST of the user USER. LIST and USER are strings.
;;;
;;; - (direct_messages): received direct messages.
;;; - (direct_messages_sent): sent direct messages.
;;; - (friends): friends timeline.
;;; - (home): home timeline.
;;; - (mentions): mentions timeline.
;;; mentions (status containing @username) for the authenticating user.
;;; - (public): public timeline.
;;; - (replies): replies.
;;; - (retweeted_by_me): retweets posted by the authenticating user.
;;; - (retweeted_to_me): retweets posted by the authenticating user's friends.
;;; - (retweets_of_me):
;;; tweets of the authenticated user that have been retweeted by others.
;;;
;;; - (search STRING): the result of searching with query STRING.
;;; - (merge SPEC1 SPEC2 ...): result of merging timelines SPEC1 SPEC2 ...
;;; - (filter REGEXP SPEC): timeline filtered with REGEXP.
;;;
;;; Timeline spec string
;;;
;;; SPEC ::= PRIMARY | COMPOSITE
;;; PRIMARY ::= USER | LIST | DIRECT_MESSSAGES | DIRECT_MESSSAGES_SENT
;;; | FRIENDS | HOME | MENTIONS | PUBLIC | REPLIES
;;; | RETWEETED_BY_ME | RETWEETED_TO_ME | RETWEETS_OF_ME
;;; | SEARCH
;;; COMPOSITE ::= MERGE | FILTER
;;;
;;; USER ::= /[a-zA-Z0-9_-]+/
;;; LIST ::= USER "/" LISTNAME
;;; LISTNAME ::= /[a-zA-Z0-9_-]+/
;;; DIRECT_MESSSAGES ::= ":direct_messages"
;;; DIRECT_MESSSAGES_SENT ::= ":direct_messages_sent"
;;; FRIENDS ::= ":friends"
;;; HOME ::= ":home" | "~"
;;; MENTIONS ::= ":mentions"
;;; PUBLIC ::= ":public"
;;; REPLIES ::= ":replies" | "@"
;;; RETWEETED_BY_ME ::= ":retweeted_by_me"
;;; RETWEETED_TO_ME ::= ":retweeted_to_me"
;;; RETWEETS_OF_ME ::= ":retweets_of_me"
;;;
;;; SEARCH ::= ":search/" QUERY_STRING "/"
;;; QUERY_STRING ::= any string, where "/" is escaped by a backslash.
;;; MERGE ::= "(" MERGED_SPECS ")"
;;; MERGED_SPECS ::= SPEC | SPEC "+" MERGED_SPECS
;;; FILTER ::= ":filter/" REGEXP "/" SPEC
;;;
(defun twittering-timeline-spec-to-string (timeline-spec &optional shorten)
"Convert TIMELINE-SPEC into a string.
If SHORTEN is non-nil, the abbreviated expression will be used."
(let ((type (car timeline-spec))
(value (cdr timeline-spec)))
(cond
;; user
((eq type 'user) (car value))
;; list
((eq type 'list) (concat (car value) "/" (cadr value)))
;; simple
((eq type 'direct_messages) ":direct_messages")
((eq type 'direct_messages_sent) ":direct_messages_sent")
((eq type 'friends) ":friends")
((eq type 'home) (if shorten "~" ":home"))
((eq type 'mentions) ":mentions")
((eq type 'public) ":public")
((eq type 'replies) (if shorten "@" ":replies"))
((eq type 'retweeted_by_me) ":retweeted_by_me")
((eq type 'retweeted_to_me) ":retweeted_to_me")
((eq type 'retweets_of_me) ":retweets_of_me")
((eq type 'search)
(let ((query (car value)))
(concat ":search/"
(replace-regexp-in-string "/" "\\/" query nil t)
"/")))
;; composite
((eq type 'filter)
(let ((regexp (car value))
(spec (cadr value)))
(concat ":filter/"
(replace-regexp-in-string "/" "\\/" regexp nil t)
"/"
(twittering-timeline-spec-to-string spec))))
((eq type 'merge)
(concat "("
(mapconcat 'twittering-timeline-spec-to-string value "+")
")"))
(t
nil))))
(defun twittering-extract-timeline-spec (str &optional unresolved-aliases)
"Extract one timeline spec from STR.
Return cons of the spec and the rest string."
(cond
((null str)
(error "STR is nil")
nil)
((string-match "^\\([a-zA-Z0-9_-]+\\)/\\([a-zA-Z0-9_-]+\\)" str)
(let ((user (match-string 1 str))
(listname (match-string 2 str))
(rest (substring str (match-end 0))))
`((list ,user ,listname) . ,rest)))
((string-match "^\\([a-zA-Z0-9_-]+\\)" str)
(let ((user (match-string 1 str))
(rest (substring str (match-end 0))))
`((user ,user) . ,rest)))
((string-match "^~" str)
`((home) . ,(substring str (match-end 0))))
((string-match (concat "^" twittering-regexp-atmark) str)
`((replies) . ,(substring str (match-end 0))))
((string-match (concat "^" twittering-regexp-hash "\\([a-zA-Z0-9_-]+\\)")
str)
(let* ((tag (match-string 1 str))
(query (concat "#" tag))
(rest (substring str (match-end 0))))
`((search ,query) . ,rest)))
((string-match "^:\\([a-z_-]+\\)" str)
(let ((type (match-string 1 str))
(following (substring str (match-end 0)))
(alist '(("direct_messages" . direct_messages)
("direct_messages_sent" . direct_messages_sent)
("friends" . friends)
("home" . home)
("mentions" . mentions)
("public" . public)
("replies" . replies)
("retweeted_by_me" . retweeted_by_me)
("retweeted_to_me" . retweeted_to_me)
("retweets_of_me" . retweets_of_me))))
(cond
((assoc type alist)
(let ((first-spec (list (cdr (assoc type alist)))))
(cons first-spec following)))
((string= type "search")
(if (string-match "^:search/\\(\\(.*?[^\\]\\)??\\(\\\\\\\\\\)*\\)??/"
str)
(let* ((escaped-query (or (match-string 1 str) ""))
(query (replace-regexp-in-string "\\\\/" "/"
escaped-query nil t))
(rest (substring str (match-end 0))))
(if (not (string= "" escaped-query))
`((search ,query) . ,rest)
(error "\"%s\" has no valid regexp" str)
nil))))
((string= type "filter")
(if (string-match "^:filter/\\(\\(.*?[^\\]\\)??\\(\\\\\\\\\\)*\\)??/"
str)
(let* ((escaped-regexp (or (match-string 1 str) ""))
(regexp (replace-regexp-in-string "\\\\/" "/"
escaped-regexp nil t))
(following (substring str (match-end 0)))
(pair (twittering-extract-timeline-spec
following unresolved-aliases))
(spec (car pair))
(rest (cdr pair)))
`((filter ,regexp ,spec) . ,rest))
(error "\"%s\" has no valid regexp" str)
nil))
(t
(error "\"%s\" is invalid as a timeline spec" str)
nil))))
((string-match "^\\$\\([a-zA-Z0-9_-]+\\)\\(?:(\\([^)]*\\))\\)?" str)
(let* ((name (match-string 1 str))
(rest (substring str (match-end 0)))
(value (cdr-safe (assoc name twittering-timeline-spec-alias)))
(arg (match-string 2 str)))
(if (member name unresolved-aliases)
(error "Alias \"%s\" includes a recursive reference" name)
(cond
((stringp value)
(twittering-extract-timeline-spec
(concat value rest)
(cons name unresolved-aliases)))
((functionp value)
(twittering-extract-timeline-spec
(funcall value arg)
(cons name unresolved-aliases)))
(t
(error "Alias \"%s\" is undefined" name))))))
((string-match "^(" str)
(let ((rest (concat "+" (substring str (match-end 0))))
(result '()))
(while (and rest (string-match "^\\+" rest))
(let* ((spec-string (substring rest (match-end 0)))
(pair (twittering-extract-timeline-spec
spec-string unresolved-aliases))
(spec (car pair))
(next-rest (cdr pair)))
(setq result (cons spec result))
(setq rest next-rest)))
(if (and rest (string-match "^)" rest))
(let ((spec-list
(apply 'append
(mapcar (lambda (x) (if (eq 'merge (car x))
(cdr x)
(list x)))
(reverse result)))))
(if (= 1 (length spec-list))
`(,(car spec-list) . ,(substring rest 1))
`((merge ,@spec-list) . ,(substring rest 1))))
(if rest
;; The string following the opening parenthesis `('
;; can be interpreted without errors,
;; but there is no corresponding closing parenthesis.
(error "\"%s\" lacks a closing parenthesis" str))
;; Does not display additional error messages if an error
;; occurred on interpreting the string following
;; the opening parenthesis `('.
nil)))
(t
(error "\"%s\" is invalid as a timeline spec" str)
nil)
))
(defun twittering-string-to-timeline-spec (spec-str)
"Convert SPEC-STR into a timeline spec.
Return nil if SPEC-STR is invalid as a timeline spec."
(let ((result-pair (twittering-extract-timeline-spec spec-str)))
(if (and result-pair (string= "" (cdr result-pair)))
(car result-pair)
nil)))
(defun twittering-timeline-spec-primary-p (spec)
"Return non-nil if SPEC is a primary timeline spec.
`primary' means that the spec is not a composite timeline spec such as
`filter' and `merge'."
(let ((primary-spec-types
'(user list
direct_messages direct_messages_sent
friends home mentions public replies
search
retweeted_by_me retweeted_to_me retweets_of_me))
(type (car spec)))
(memq type primary-spec-types)))
(defun twittering-timeline-spec-is-direct-messages-p (spec)
"Return non-nil if SPEC is a timeline spec which is related of
direct_messages."
(and spec
(memq (car spec) '(direct_messages direct_messages_sent))))
(defun twittering-equal-string-as-timeline (spec-str1 spec-str2)
"Return non-nil if SPEC-STR1 equals SPEC-STR2 as a timeline spec."
(if (and (stringp spec-str1) (stringp spec-str2))
(let ((spec1 (twittering-string-to-timeline-spec spec-str1))
(spec2 (twittering-string-to-timeline-spec spec-str2)))
(equal spec1 spec2))
nil))
(defun twittering-timeline-spec-to-host-method (spec)
(if (twittering-timeline-spec-primary-p spec)
(let ((api-host twittering-api-host)
(search-host twittering-api-search-host)
(type (car spec))
(value (cdr spec)))
(cond
((eq type 'user)
(let ((username (car value)))
`(,api-host ,(concat "1/statuses/user_timeline/" username))))
((eq type 'list)
(let ((username (car value))
(list-name (cadr value)))
`(,api-host
,(concat "1/" username "/lists/" list-name "/statuses"))))
((eq type 'direct_messages)
`(,api-host "1/direct_messages"))
((eq type 'direct_messages_sent)
`(,api-host "1/direct_messages/sent"))
((eq type 'friends)
`(,api-host "1/statuses/friends_timeline"))
((eq type 'home)
`(,api-host "1/statuses/home_timeline"))
((eq type 'mentions)
`(,api-host "1/statuses/mentions"))
((eq type 'public)
`(,api-host "1/statuses/public_timeline"))