mirror of
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5d2e28bfb4
(mh-face-display-function, mh-x-image-display): ...rather than bind default-enable-multibyte-characters.
478 lines
19 KiB
EmacsLisp
478 lines
19 KiB
EmacsLisp
;;; mh-xface.el --- MH-E X-Face and Face header field display
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;; Copyright (C) 2002, 2003, 2005, 2006, 2007, 2008 Free Software Foundation, Inc.
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;; Author: Bill Wohler <wohler@newt.com>
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;; Maintainer: Bill Wohler <wohler@newt.com>
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;; Keywords: mail
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;; See: mh-e.el
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;; This file is part of GNU Emacs.
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;; GNU Emacs is free software; you can redistribute it and/or modify
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;; it under the terms of the GNU General Public License as published by
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;; the Free Software Foundation; either version 3, or (at your option)
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;; any later version.
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;; GNU Emacs is distributed in the hope that it will be useful,
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;; but WITHOUT ANY WARRANTY; without even the implied warranty of
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;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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;; GNU General Public License for more details.
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;; You should have received a copy of the GNU General Public License
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;; along with GNU Emacs; see the file COPYING. If not, write to the
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;; Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
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;; Boston, MA 02110-1301, USA.
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;;; Commentary:
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;;; Change Log:
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;;; Code:
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(require 'mh-e)
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(mh-require-cl)
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(autoload 'message-fetch-field "message")
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(defvar mh-show-xface-function
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(cond ((and (featurep 'xemacs) (locate-library "x-face") (not (featurep 'xface)))
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(load "x-face" t t)
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#'mh-face-display-function)
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((>= emacs-major-version 21)
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#'mh-face-display-function)
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(t #'ignore))
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"Determine at run time what function should be called to display X-Face.")
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(defvar mh-uncompface-executable
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(and (fboundp 'executable-find) (executable-find "uncompface")))
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;;; X-Face Display
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;;;###mh-autoload
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(defun mh-show-xface ()
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"Display X-Face."
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(when (and window-system mh-show-use-xface-flag
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(or mh-decode-mime-flag mh-mhl-format-file
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mh-clean-message-header-flag))
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(funcall mh-show-xface-function)))
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;; Shush compiler.
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(defun mh-face-display-function ()
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"Display a Face, X-Face, or X-Image-URL header field.
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If more than one of these are present, then the first one found
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in this order is used."
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(save-restriction
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(goto-char (point-min))
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(re-search-forward "\n\n" (point-max) t)
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(narrow-to-region (point-min) (point))
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(let* ((case-fold-search t)
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(face (message-fetch-field "face" t))
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(x-face (message-fetch-field "x-face" t))
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(url (message-fetch-field "x-image-url" t))
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raw type)
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(cond (face (setq raw (mh-face-to-png face)
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type 'png))
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(x-face (setq raw (mh-uncompface x-face)
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type 'pbm))
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(url (setq type 'url))
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(t (multiple-value-setq (type raw) (mh-picon-get-image))))
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(when type
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(goto-char (point-min))
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(when (re-search-forward "^from:" (point-max) t)
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;; GNU Emacs
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(mh-do-in-gnu-emacs
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(if (eq type 'url)
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(mh-x-image-url-display url)
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(mh-funcall-if-exists
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insert-image (create-image
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raw type t
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:foreground
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(mh-face-foreground 'mh-show-xface nil t)
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:background
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(mh-face-background 'mh-show-xface nil t))
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" ")))
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;; XEmacs
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(mh-do-in-xemacs
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(cond
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((eq type 'url)
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(mh-x-image-url-display url))
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((eq type 'png)
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(when (featurep 'png)
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(set-extent-begin-glyph
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(make-extent (point) (point))
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(make-glyph (vector 'png ':data (mh-face-to-png face))))))
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;; Try internal xface support if available...
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((and (eq type 'pbm) (featurep 'xface))
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(set-glyph-face
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(set-extent-begin-glyph
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(make-extent (point) (point))
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(make-glyph (vector 'xface ':data (concat "X-Face: " x-face))))
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'mh-show-xface))
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;; Otherwise try external support with x-face...
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((and (eq type 'pbm)
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(fboundp 'x-face-xmas-wl-display-x-face)
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(fboundp 'executable-find) (executable-find "uncompface"))
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(mh-funcall-if-exists x-face-xmas-wl-display-x-face))
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;; Picon display
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((and raw (member type '(xpm xbm gif)))
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(when (featurep type)
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(set-extent-begin-glyph
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(make-extent (point) (point))
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(make-glyph (vector type ':data raw))))))
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(when raw (insert " "))))))))
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(defun mh-face-to-png (data)
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"Convert base64 encoded DATA to png image."
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(with-temp-buffer
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(set-buffer-multibyte nil)
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(insert data)
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(ignore-errors (base64-decode-region (point-min) (point-max)))
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(buffer-string)))
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(defun mh-uncompface (data)
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"Run DATA through `uncompface' to generate bitmap."
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(with-temp-buffer
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(set-buffer-multibyte nil)
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(insert data)
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(when (and mh-uncompface-executable
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(equal (call-process-region (point-min) (point-max)
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mh-uncompface-executable t '(t nil))
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0))
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(mh-icontopbm)
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(buffer-string))))
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(defun mh-icontopbm ()
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"Elisp substitute for `icontopbm'."
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(goto-char (point-min))
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(let ((end (point-max)))
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(while (re-search-forward "0x\\(..\\)\\(..\\)," nil t)
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(save-excursion
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(goto-char (point-max))
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(insert (string-to-number (match-string 1) 16))
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(insert (string-to-number (match-string 2) 16))))
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(delete-region (point-min) end)
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(goto-char (point-min))
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(insert "P4\n48 48\n")))
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;;; Picon Display
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;; XXX: This should be customizable. As a side-effect of setting this
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;; variable, arrange to reset mh-picon-existing-directory-list to 'unset.
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(defvar mh-picon-directory-list
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'("~/.picons" "~/.picons/users" "~/.picons/usenix" "~/.picons/news"
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"~/.picons/domains" "~/.picons/misc"
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"/usr/share/picons/" "/usr/share/picons/users" "/usr/share/picons/usenix"
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"/usr/share/picons/news" "/usr/share/picons/domains"
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"/usr/share/picons/misc")
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"List of directories where picons reside.
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The directories are searched for in the order they appear in the list.")
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(defvar mh-picon-existing-directory-list 'unset
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"List of directories to search in.")
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(defvar mh-picon-cache (make-hash-table :test #'equal))
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(defvar mh-picon-image-types
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(loop for type in '(xpm xbm gif)
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when (or (mh-do-in-gnu-emacs
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(ignore-errors
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(mh-funcall-if-exists image-type-available-p type)))
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(mh-do-in-xemacs (featurep type)))
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collect type))
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(autoload 'message-tokenize-header "sendmail")
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(defun* mh-picon-get-image ()
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"Find the best possible match and return contents."
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(mh-picon-set-directory-list)
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(save-restriction
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(let* ((from-field (ignore-errors (car (message-tokenize-header
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(mh-get-header-field "from:")))))
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(from (car (ignore-errors
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(mh-funcall-if-exists ietf-drums-parse-address
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from-field))))
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(host (and from
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(string-match "\\([^+]*\\)\\(+.*\\)?@\\(.*\\)" from)
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(downcase (match-string 3 from))))
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(user (and host (downcase (match-string 1 from))))
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(canonical-address (format "%s@%s" user host))
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(cached-value (gethash canonical-address mh-picon-cache))
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(host-list (and host (delete "" (split-string host "\\."))))
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(match nil))
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(cond (cached-value (return-from mh-picon-get-image cached-value))
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((not host-list) (return-from mh-picon-get-image nil)))
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(setq match
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(block 'loop
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;; u@h search
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(loop for dir in mh-picon-existing-directory-list
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do (loop for type in mh-picon-image-types
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;; [path]user@host
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for file1 = (format "%s/%s.%s"
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dir canonical-address type)
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when (file-exists-p file1)
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do (return-from 'loop file1)
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;; [path]user
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for file2 = (format "%s/%s.%s" dir user type)
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when (file-exists-p file2)
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do (return-from 'loop file2)
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;; [path]host
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for file3 = (format "%s/%s.%s" dir host type)
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when (file-exists-p file3)
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do (return-from 'loop file3)))
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;; facedb search
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;; Search order for user@foo.net:
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;; [path]net/foo/user
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;; [path]net/foo/user/face
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;; [path]net/user
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;; [path]net/user/face
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;; [path]net/foo/unknown
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;; [path]net/foo/unknown/face
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;; [path]net/unknown
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;; [path]net/unknown/face
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(loop for u in (list user "unknown")
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do (loop for dir in mh-picon-existing-directory-list
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do (loop for x on host-list by #'cdr
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for y = (mh-picon-generate-path x u dir)
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do (loop for type in mh-picon-image-types
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for z1 = (format "%s.%s" y type)
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when (file-exists-p z1)
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do (return-from 'loop z1)
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for z2 = (format "%s/face.%s"
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y type)
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when (file-exists-p z2)
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do (return-from 'loop z2)))))))
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(setf (gethash canonical-address mh-picon-cache)
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(mh-picon-file-contents match)))))
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(defun mh-picon-set-directory-list ()
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"Update `mh-picon-existing-directory-list' if needed."
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(when (eq mh-picon-existing-directory-list 'unset)
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(setq mh-picon-existing-directory-list
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(loop for x in mh-picon-directory-list
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when (file-directory-p x) collect x))))
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(defun mh-picon-generate-path (host-list user directory)
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"Generate the image file path.
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HOST-LIST is the parsed host address of the email address, USER
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the username and DIRECTORY is the directory relative to which the
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path is generated."
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(loop with acc = ""
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for elem in host-list
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do (setq acc (format "%s/%s" elem acc))
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finally return (format "%s/%s%s" directory acc user)))
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(defun mh-picon-file-contents (file)
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"Return details about FILE.
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A list of consisting of a symbol for the type of the file and the
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file contents as a string is returned. If FILE is nil, then both
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elements of the list are nil."
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(if (stringp file)
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(with-temp-buffer
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(set-buffer-multibyte nil)
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(let ((type (and (string-match ".*\\.\\(...\\)$" file)
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(intern (match-string 1 file)))))
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(insert-file-contents-literally file)
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(values type (buffer-string))))
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(values nil nil)))
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;;; X-Image-URL Display
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(defvar mh-x-image-scaling-function
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(cond ((executable-find "convert")
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'mh-x-image-scale-with-convert)
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((and (executable-find "anytopnm") (executable-find "pnmscale")
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(executable-find "pnmtopng"))
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'mh-x-image-scale-with-pnm)
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(t 'ignore))
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"Function to use to scale image to proper size.")
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(defun mh-x-image-scale-with-pnm (input output)
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"Scale image in INPUT file and write to OUTPUT file using pnm tools."
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(let ((res (shell-command-to-string
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(format "anytopnm < %s | pnmscale -xysize 96 48 | pnmtopng > %s"
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input output))))
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(unless (equal res "")
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(delete-file output))))
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(defun mh-x-image-scale-with-convert (input output)
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"Scale image in INPUT file and write to OUTPUT file using ImageMagick."
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(call-process "convert" nil nil nil "-geometry" "96x48" input output))
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(defvar mh-wget-executable nil)
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(defvar mh-wget-choice
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(or (and (setq mh-wget-executable (executable-find "wget")) 'wget)
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(and (setq mh-wget-executable (executable-find "fetch")) 'fetch)
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(and (setq mh-wget-executable (executable-find "curl")) 'curl)))
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(defvar mh-wget-option
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(cdr (assoc mh-wget-choice '((curl . "-o") (fetch . "-o") (wget . "-O")))))
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(defvar mh-x-image-temp-file nil)
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(defvar mh-x-image-url nil)
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(defvar mh-x-image-marker nil)
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(defvar mh-x-image-url-cache-file nil)
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(defun mh-x-image-url-display (url)
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"Display image from location URL.
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If the URL isn't present in the cache then it is fetched with wget."
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(let* ((cache-filename (mh-x-image-url-cache-canonicalize url))
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(state (mh-x-image-get-download-state cache-filename))
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(marker (set-marker (make-marker) (point))))
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(set (make-local-variable 'mh-x-image-marker) marker)
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(cond ((not (mh-x-image-url-sane-p url)))
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((eq state 'ok)
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(mh-x-image-display cache-filename marker))
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((or (not mh-wget-executable)
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(eq mh-x-image-scaling-function 'ignore)))
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((eq state 'never))
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((not mh-fetch-x-image-url)
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(set-marker marker nil))
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((eq state 'try-again)
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(mh-x-image-set-download-state cache-filename nil)
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(mh-x-image-url-fetch-image url cache-filename marker
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'mh-x-image-scale-and-display))
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((and (eq mh-fetch-x-image-url 'ask)
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(not (y-or-n-p (format "Fetch %s? " url))))
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(mh-x-image-set-download-state cache-filename 'never))
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((eq state nil)
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(mh-x-image-url-fetch-image url cache-filename marker
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'mh-x-image-scale-and-display)))))
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(defvar mh-x-image-cache-directory nil
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"Directory where X-Image-URL images are cached.")
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;;;###mh-autoload
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(defun mh-set-x-image-cache-directory (directory)
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"Set the DIRECTORY where X-Image-URL images are cached.
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This is only done if `mh-x-image-cache-directory' is nil."
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;; XXX This is the code that used to be in find-user-path. Is there
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;; a good reason why the variable is set conditionally? Do we expect
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;; the user to have set this variable directly?
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(unless mh-x-image-cache-directory
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(setq mh-x-image-cache-directory directory)))
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(defun mh-x-image-url-cache-canonicalize (url)
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"Canonicalize URL.
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Replace the ?/ character with a ?! character and append .png.
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Also replaces special characters with `mh-url-hexify-string'
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since not all characters, such as :, are valid within Windows
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filenames. In addition, replaces * with %2a. See URL
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`http://msdn.microsoft.com/library/default.asp?url=/library/en-us/shellcc/platform/shell/reference/ifaces/iitemnamelimits/GetValidCharacters.asp'."
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(format "%s/%s.png" mh-x-image-cache-directory
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(mh-replace-regexp-in-string
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"\*" "%2a"
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(mh-url-hexify-string
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(with-temp-buffer
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(insert url)
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(mh-replace-string "/" "!")
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(buffer-string))))))
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(defun mh-x-image-get-download-state (file)
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"Check the state of FILE by following any symbolic links."
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(unless (file-exists-p mh-x-image-cache-directory)
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(call-process "mkdir" nil nil nil mh-x-image-cache-directory))
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(cond ((file-symlink-p file)
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(intern (file-name-nondirectory (file-chase-links file))))
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((not (file-exists-p file)) nil)
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(t 'ok)))
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(defun mh-x-image-set-download-state (file data)
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"Setup a symbolic link from FILE to DATA."
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(if data
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(make-symbolic-link (symbol-name data) file t)
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(delete-file file)))
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(defun mh-x-image-url-sane-p (url)
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"Check if URL is something sensible."
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(let ((len (length url)))
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(cond ((< len 5) nil)
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((not (equal (substring url 0 5) "http:")) nil)
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((> len 100) nil)
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(t t))))
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(defun mh-x-image-display (image marker)
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"Display IMAGE at MARKER."
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(with-current-buffer (marker-buffer marker)
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(let ((inhibit-read-only t)
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(buffer-modified-flag (buffer-modified-p)))
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(unwind-protect
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(when (and (file-readable-p image) (not (file-symlink-p image))
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(eq marker mh-x-image-marker))
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(goto-char marker)
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(mh-do-in-gnu-emacs
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(mh-funcall-if-exists insert-image (create-image image 'png)))
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(mh-do-in-xemacs
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(when (featurep 'png)
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(set-extent-begin-glyph
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(make-extent (point) (point))
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(make-glyph
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(vector 'png ':data (with-temp-buffer
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(insert-file-contents-literally image)
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(buffer-string))))))))
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(set-buffer-modified-p buffer-modified-flag)))))
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(defun mh-x-image-url-fetch-image (url cache-file marker sentinel)
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"Fetch and display the image specified by URL.
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After the image is fetched, it is stored in CACHE-FILE. It will
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be displayed in a buffer and position specified by MARKER. The
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actual display is carried out by the SENTINEL function."
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(if mh-wget-executable
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(let ((buffer (get-buffer-create (generate-new-buffer-name
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mh-temp-fetch-buffer)))
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(filename (or (mh-funcall-if-exists make-temp-file "mhe-fetch")
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(expand-file-name (make-temp-name "~/mhe-fetch")))))
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(with-current-buffer buffer
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(set (make-local-variable 'mh-x-image-url-cache-file) cache-file)
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(set (make-local-variable 'mh-x-image-marker) marker)
|
||
(set (make-local-variable 'mh-x-image-temp-file) filename))
|
||
(set-process-sentinel
|
||
(start-process "*mh-x-image-url-fetch*" buffer
|
||
mh-wget-executable mh-wget-option filename url)
|
||
sentinel))
|
||
;; Temporary failure
|
||
(mh-x-image-set-download-state cache-file 'try-again)))
|
||
|
||
(defun mh-x-image-scale-and-display (process change)
|
||
"When the wget PROCESS terminates scale and display image.
|
||
The argument CHANGE is ignored."
|
||
(when (eq (process-status process) 'exit)
|
||
(let (marker temp-file cache-filename wget-buffer)
|
||
(with-current-buffer (setq wget-buffer (process-buffer process))
|
||
(setq marker mh-x-image-marker
|
||
cache-filename mh-x-image-url-cache-file
|
||
temp-file mh-x-image-temp-file))
|
||
(cond
|
||
;; Check if we have `convert'
|
||
((eq mh-x-image-scaling-function 'ignore)
|
||
(message "The \"convert\" program is needed to display X-Image-URL")
|
||
(mh-x-image-set-download-state cache-filename 'try-again))
|
||
;; Scale fetched image
|
||
((and (funcall mh-x-image-scaling-function temp-file cache-filename)
|
||
nil))
|
||
;; Attempt to display image if we have it
|
||
((file-exists-p cache-filename)
|
||
(mh-x-image-display cache-filename marker))
|
||
;; We didn't find the image. Should we try to display it the next time?
|
||
(t (mh-x-image-set-download-state cache-filename 'try-again)))
|
||
(ignore-errors
|
||
(set-marker marker nil)
|
||
(delete-process process)
|
||
(kill-buffer wget-buffer)
|
||
(delete-file temp-file)))))
|
||
|
||
(provide 'mh-xface)
|
||
|
||
;; Local Variables:
|
||
;; indent-tabs-mode: nil
|
||
;; sentence-end-double-space: nil
|
||
;; End:
|
||
|
||
;; arch-tag: a79dd33f-d0e5-4b19-a53a-be690f90229a
|
||
;;; mh-xface.el ends here
|