- (setq gnus-picons-glyph-alist nil
- gnus-picons-url-alist nil))
-
-(gnus-add-shutdown 'gnus-picons-close 'gnus)
-
-(defun gnus-picons-close ()
- "Shut down the picons."
- (if gnus-picons-clear-cache-on-shutdown
- (gnus-picons-clear-cache)))
-
-;;; Query a remote DB. This requires some stuff from w3 !
-
-(eval-and-compile
- (ignore-errors
- (require 'url)
- (require 'w3-forms)))
-
-(defun gnus-picons-url-retrieve (url fn arg)
- (let ((old-asynch (default-value 'url-be-asynchronous))
- (url-working-buffer (generate-new-buffer " *picons*"))
- (url-package-name "Gnus")
- (url-package-version gnus-version-number)
- url-request-method)
- (setq-default url-be-asynchronous t)
- (save-excursion
- (set-buffer url-working-buffer)
- (setq url-be-asynchronous t
- url-current-callback-data arg
- url-current-callback-func fn)
- (url-retrieve url t))
- (setq-default url-be-asynchronous old-asynch)))
-
-(defun gnus-picons-make-glyph (type)
- "Make a TYPE glyph using current buffer as data. Handles xbm nicely."
- (cond ((null type) nil)
- ((eq type 'xbm) (let ((fname (make-temp-name "/tmp/picon")))
- (write-region (point-min) (point-max) fname
- nil 'quiet)
- (prog1 (make-glyph (vector 'xbm :file fname))
- (delete-file fname))))
- (t (make-glyph (vector type :data (buffer-string))))))
-
-;;; Parsing of piconsearch result page.
-
-;; Assumes:
-;; 1 - each value field has the form: "<strong>key</strong> = <kbd>value</kbd>"
-;; 2 - a "<p>" separates the keywords from the results
-;; 3 - every results begins by the path within the database at the beginning
-;; of the line in raw text.
-;; 3b - and the href following it is the preferred image type.
-
-;; if 1 or 2 is not met, it will probably cause an error. The other
-;; will go undetected
-
-(defun gnus-picons-parse-value (name)
- (goto-char (point-min))
- (if (re-search-forward (concat "<strong>"
- (regexp-quote name)
- "</strong> *= *<kbd> *\\([^ <][^<]*\\) *</kbd>")
- nil t)
- (buffer-substring (match-beginning 1) (match-end 1))))
-
-(defun gnus-picons-parse-filenames ()
- ;; returns an alist of ((USER ADDRS DB) . URL)
- (let ((case-fold-search t)
- (user (gnus-picons-parse-value "user"))
- (host (gnus-picons-parse-value "host"))
- (dbs (message-tokenize-header (gnus-picons-parse-value "db") " "))
- start-re cur-db cur-host cur-user types res)
- ;; now point will be somewhere in the header. Find beginning of
- ;; entries
- (when (and user host dbs)
- (setq start-re
- (concat
- ;; dbs
- "^\\(" (mapconcat 'identity dbs "\\|") "\\)/"
- ;; host
- "\\(\\(" (replace-in-string host "\\." "/\\|" t) "/\\|MISC/\\)*\\)"
- ;; user
- "\\(" (regexp-quote user) "\\|unknown\\)/"
- "face\\."))
- (re-search-forward "<p>[ \t\n]*")
- (while (re-search-forward start-re nil t)
- (setq cur-db (buffer-substring (match-beginning 1) (match-end 1))
- cur-host (buffer-substring (match-beginning 2) (match-end 2))
- cur-user (buffer-substring (match-beginning 4) (match-end 4))
- cur-host (nreverse (message-tokenize-header cur-host "/")))
- ;; XXX - KLUDGE: there is a blank picon in news/MISC/unknown
- (unless (and (string-equal cur-db "news")
- (string-equal cur-user "unknown")
- (equal cur-host '("MISC")))
- ;; ok now we have found an entry (USER HOST DB), find the
- ;; corresponding picon URL
- (save-restriction
- ;; restrict region to this entry
- (narrow-to-region (point) (search-forward "<br>"))
- (goto-char (point-min))
- (setq types gnus-picons-file-suffixes)
- (while (and types
- (not (re-search-forward
- (concat "<a[ \t\n]+href=\"\\([^\"]*\\."
- (regexp-quote (car types)) "\\)\"")
- nil t)))
- (pop types))
- (push (cons (list cur-user cur-host cur-db)
- (buffer-substring (match-beginning 1) (match-end 1)))
- res))))
- (nreverse res))))
-
-;;; picon network display functions :
-
-(defun gnus-picons-network-display-internal (sym-ann glyph part right-p marker)
- (let ((buf (marker-buffer marker))
- (pos (marker-position marker)))
- (if (and buf pos)
- (save-excursion
- (set-buffer buf)
- (goto-char pos)
- (gnus-picons-display-picon-or-name glyph part right-p))))
- (gnus-picons-next-job-internal))
-
-(defun gnus-picons-network-display-callback (url part sym-ann right-p marker)
- (let ((glyph (gnus-picons-make-glyph (cdr (assoc url-current-mime-type
- w3-image-mappings)))))
- (kill-buffer (current-buffer))
- (push (cons url glyph) gnus-picons-glyph-alist)
- ;; only do the job if it has not been preempted.
- (if (equal gnus-picons-job-already-running
- (list sym-ann 'picon url part right-p marker))
- (gnus-picons-network-display-internal sym-ann glyph part right-p marker)
- (gnus-picons-next-job-internal))))
-
-(defun gnus-picons-network-display (url part sym-ann right-p marker)
- (let ((cache (assoc url gnus-picons-glyph-alist)))
- (if (or cache (null url))
- (gnus-picons-network-display-internal
- sym-ann (cdr cache) part right-p marker)
- (gnus-picons-url-retrieve url 'gnus-picons-network-display-callback
- (list url part sym-ann right-p marker)))))
-
-;;; search job functions
-
-(defun gnus-picons-display-bar-p ()
- (and (not (eq gnus-picons-display-where 'article))
- gnus-picons-display-as-address))
-
-(defun gnus-picons-network-search-internal (user addrs dbs sym-ann right-p
- marker &optional fnames)
- (let (curkey dom pfx url dbs-tmp cache new-jobs)
- ;; First do the domain search
- (dolist (part (if right-p
- (reverse addrs)
- addrs))
- (setq pfx (nconc (list part) pfx)
- dom (cond ((and dom right-p) (concat part "." dom))
- (dom (concat dom "." part))
- (t part))
- curkey (list "unknown" dom dbs))
- (when (null (setq cache (assoc curkey gnus-picons-url-alist)))
- ;; This one is not yet in the cache, create a new entry
- ;; Search for an entry
- (setq dbs-tmp dbs
- url nil)
- (while (and dbs-tmp (null url))
- (setq url (or (cdr (assoc (list "unknown" pfx (car dbs-tmp)) fnames))
- (and (eq dom part)
- ;; This is the first component. Try the
- ;; catch-all MISC component
- (cdr (assoc (list "unknown"
- '("MISC")
- (car dbs-tmp))
- fnames)))))
- (pop dbs-tmp))
- (push (setq cache (cons curkey url)) gnus-picons-url-alist))
- ;; Put this glyph in the job list
- (if (and (not (eq dom part)) gnus-picons-display-as-address)
- (push (list sym-ann "." right-p marker) new-jobs))
- (push (list sym-ann 'picon (cdr cache) part right-p marker) new-jobs))
- ;; next, the user search
- (when user
- (setq curkey (list user dom gnus-picons-user-directories))
- (if (null (setq cache (assoc curkey gnus-picons-url-alist)))
- (let ((users (list user "unknown"))
- dirs usr domains-tmp dir picon)
- (while (and users (null picon))
- (setq dirs gnus-picons-user-directories
- usr (pop users))
- (while (and dirs (null picon))
- (setq domains-tmp addrs
- dir (pop dirs))
- (while (and domains-tmp
- (null (setq picon (assoc (list usr domains-tmp dir)
- fnames))))
- (pop domains-tmp))
- (unless picon
- (setq picon (assoc (list usr '("MISC") dir) fnames)))))
- (push (setq cache (cons curkey (cdr picon)))
- gnus-picons-url-alist)))
- (if (and gnus-picons-display-as-address new-jobs)
- (push (list sym-ann "@" right-p marker) new-jobs))
- (push (list sym-ann 'picon (cdr cache) user right-p marker) new-jobs))
- (if (and (gnus-picons-display-bar-p) (not right-p))
- (push (list sym-ann 'bar right-p marker) new-jobs))
- ;; only put the jobs in the queue if this job has not been preempted.
- (if (equal gnus-picons-job-already-running
- (list sym-ann 'search user addrs dbs right-p marker))
- (setq gnus-picons-jobs-alist
- (nconc (if (and (gnus-picons-display-bar-p) right-p)
- (list (list sym-ann 'bar right-p marker)))
- (nreverse new-jobs)
- gnus-picons-jobs-alist)))
- (gnus-picons-next-job-internal)))
-
-(defun gnus-picons-network-search-callback (user addrs dbs sym-ann right-p
- marker)
- (gnus-picons-network-search-internal
- user addrs dbs sym-ann right-p marker
- (prog1
- (gnus-picons-parse-filenames)
- (kill-buffer (current-buffer)))))
-
-;; Initiate a query on the picon database
-(defun gnus-picons-network-search (user addrs dbs sym-ann right-p marker)
- (let* ((host (mapconcat 'identity addrs "."))
- (key (list (or user "unknown") host (if user
- gnus-picons-user-directories
- dbs)))
- (cache (assoc key gnus-picons-url-alist)))
- (if (null cache)
- (gnus-picons-url-retrieve
- (concat gnus-picons-piconsearch-url
- "?user=" (w3-form-encode-xwfu (or user "unknown"))
- "&host=" (w3-form-encode-xwfu host)
- "&db=" (mapconcat 'w3-form-encode-xwfu
- (if user
- (append dbs
- gnus-picons-user-directories)
- dbs)
- "+"))
- 'gnus-picons-network-search-callback
- (list user addrs dbs sym-ann right-p marker))
- (gnus-picons-network-search-internal
- user addrs dbs sym-ann right-p marker))))
-
-;;; Main jobs dispatcher function
-
-(defun gnus-picons-next-job-internal ()
- (when (setq gnus-picons-job-already-running (pop gnus-picons-jobs-alist))
- (let* ((job gnus-picons-job-already-running)
- (sym-ann (pop job))
- (tag (pop job)))
- (when tag
- (cond
- ((stringp tag);; (SYM-ANN "..." RIGHT-P MARKER)
- (gnus-picons-network-display-internal
- sym-ann nil tag (pop job) (pop job)))
- ((eq 'bar tag);; (SYM-ANN 'bar RIGHT-P MARKER)
- (gnus-picons-network-display-internal
- sym-ann
- (let ((gnus-picons-file-suffixes '("xbm")))
- (gnus-picons-try-face
- gnus-xmas-glyph-directory "bar."))
- nil (pop job) (pop job)))
- ((eq 'search tag);; (SYM-ANN 'search USER ADDRS DBS RIGHT-P MARKER)
- (gnus-picons-network-search
- (pop job) (pop job) (pop job) sym-ann (pop job) (pop job)))
- ((eq 'picon tag);; (SYM-ANN 'picon URL PART RIGHT-P MARKER)
- (gnus-picons-network-display
- (pop job) (pop job) sym-ann (pop job) (pop job)))
- (t
- (setq gnus-picons-job-already-running nil)
- (error "Unknown picon job tag %s" tag)))))))
-
-(defun gnus-picons-next-job ()
- "Start processing the job queue if it is not in progress."
- (unless gnus-picons-job-already-running
- (gnus-picons-next-job-internal)))