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-;; htmlize.el -- Convert buffer text and decorations to HTML.
-
-;; Copyright (C) 1997,1998,1999,2000,2001,2002,2003,2005,2006,2009 Hrvoje Niksic
-
-;; Author: Hrvoje Niksic <hniksic@xemacs.org>
-;; Keywords: hypermedia, extensions
-
-;; This program 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 program 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 this program; see the file COPYING. If not, write to the
-;; Free Software Foundation, Inc., 59 Temple Place - Suite 330,
-;; Boston, MA 02111-1307, USA.
-
-;;; Commentary:
-
-;; This package converts the buffer text and the associated
-;; decorations to HTML. Mail to <hniksic@xemacs.org> to discuss
-;; features and additions. All suggestions are more than welcome.
-
-;; To use this, just switch to the buffer you want HTML-ized and type
-;; `M-x htmlize-buffer'. You will be switched to a new buffer that
-;; contains the resulting HTML code. You can edit and inspect this
-;; buffer, or you can just save it with C-x C-w. `M-x htmlize-file'
-;; will find a file, fontify it, and save the HTML version in
-;; FILE.html, without any additional intervention. `M-x
-;; htmlize-many-files' allows you to htmlize any number of files in
-;; the same manner. `M-x htmlize-many-files-dired' does the same for
-;; files marked in a dired buffer.
-
-;; htmlize supports three types of HTML output, selected by setting
-;; `htmlize-output-type': `css', `inline-css', and `font'. In `css'
-;; mode, htmlize uses cascading style sheets to specify colors; it
-;; generates classes that correspond to Emacs faces and uses <span
-;; class=FACE>...</span> to color parts of text. In this mode, the
-;; produced HTML is valid under the 4.01 strict DTD, as confirmed by
-;; the W3C validator. `inline-css' is like `css', except the CSS is
-;; put directly in the STYLE attribute of the SPAN element, making it
-;; possible to paste the generated HTML to other documents. In `font'
-;; mode, htmlize uses <font color="...">...</font> to colorize HTML,
-;; which is not standard-compliant, but works better in older
-;; browsers. `css' mode is the default.
-
-;; You can also use htmlize from your Emacs Lisp code. When called
-;; non-interactively, `htmlize-buffer' and `htmlize-region' will
-;; return the resulting HTML buffer, but will not change current
-;; buffer or move the point.
-
-;; I tried to make the package elisp-compatible with multiple Emacsen,
-;; specifically aiming for XEmacs 19.14+ and GNU Emacs 19.34+. Please
-;; let me know if it doesn't work on some of those, and I'll try to
-;; fix it. I relied heavily on the presence of CL extensions,
-;; especially for cross-emacs compatibility; please don't try to
-;; remove that particular dependency. When byte-compiling under GNU
-;; Emacs, you're likely to get some warnings; just ignore them.
-
-;; The latest version should be available at:
-;;
-;; <http://fly.srk.fer.hr/~hniksic/emacs/htmlize.el>
-;;
-;; You can find a sample of htmlize's output (possibly generated with
-;; an older version) at:
-;;
-;; <http://fly.srk.fer.hr/~hniksic/emacs/htmlize.el.html>
-
-;; Thanks go to the multitudes of people who have sent reports and
-;; contributed comments, suggestions, and fixes. They include Ron
-;; Gut, Bob Weiner, Toni Drabik, Peter Breton, Thomas Vogels, Juri
-;; Linkov, Maciek Pasternacki, and many others.
-
-;; User quotes: "You sir, are a sick, sick, _sick_ person. :)"
-;; -- Bill Perry, author of Emacs/W3
-
-
-;;; Code:
-
-(require 'cl)
-(eval-when-compile
- (if (string-match "XEmacs" emacs-version)
- (byte-compiler-options
- (warnings (- unresolved))))
- (defvar font-lock-auto-fontify)
- (defvar font-lock-support-mode)
- (defvar global-font-lock-mode)
- (when (and (eq emacs-major-version 19)
- (not (string-match "XEmacs" emacs-version)))
- ;; Older versions of GNU Emacs fail to autoload cl-extra even when
- ;; `cl' is loaded.
- (load "cl-extra")))
-
-(defconst htmlize-version "1.36")
-
-;; Incantations to make custom stuff work without customize, e.g. on
-;; XEmacs 19.14 or GNU Emacs 19.34.
-(eval-and-compile
- (condition-case ()
- (require 'custom)
- (error nil))
- (if (and (featurep 'custom) (fboundp 'custom-declare-variable))
- nil ; we've got what we needed
- ;; No custom or obsolete custom, define surrogates. Define all
- ;; three macros, so we don't hose another library that expects
- ;; e.g. `defface' to work after (fboundp 'defcustom) succeeds.
- (defmacro defgroup (&rest ignored) nil)
- (defmacro defcustom (var value doc &rest ignored)
- `(defvar ,var ,value ,doc))
- (defmacro defface (face value doc &rest stuff)
- `(make-face ,face))))
-
-(defgroup htmlize nil
- "Convert buffer text and faces to HTML."
- :group 'hypermedia)
-
-(defcustom htmlize-head-tags ""
- "*Additional tags to insert within HEAD of the generated document."
- :type 'string
- :group 'htmlize)
-
-(defcustom htmlize-output-type 'css
- "*Output type of generated HTML, one of `css', `inline-css', or `font'.
-When set to `css' (the default), htmlize will generate a style sheet
-with description of faces, and use it in the HTML document, specifying
-the faces in the actual text with <span class=\"FACE\">.
-
-When set to `inline-css', the style will be generated as above, but
-placed directly in the STYLE attribute of the span ELEMENT: <span
-style=\"STYLE\">. This makes it easier to paste the resulting HTML to
-other documents.
-
-When set to `font', the properties will be set using layout tags
-<font>, <b>, <i>, <u>, and <strike>.
-
-`css' output is normally preferred, but `font' is still useful for
-supporting old, pre-CSS browsers, and both `inline-css' and `font' for
-easier embedding of colorized text in foreign HTML documents (no style
-sheet to carry around)."
- :type '(choice (const css) (const inline-css) (const font))
- :group 'htmlize)
-
-(defcustom htmlize-generate-hyperlinks t
- "*Non-nil means generate the hyperlinks for URLs and mail addresses.
-This is on by default; set it to nil if you don't want htmlize to
-insert hyperlinks in the resulting HTML. (In which case you can still
-do your own hyperlinkification from htmlize-after-hook.)"
- :type 'boolean
- :group 'htmlize)
-
-(defcustom htmlize-hyperlink-style "
- a {
- color: inherit;
- background-color: inherit;
- font: inherit;
- text-decoration: inherit;
- }
- a:hover {
- text-decoration: underline;
- }
-"
- "*The CSS style used for hyperlinks when in CSS mode."
- :type 'string
- :group 'htmlize)
-
-(defcustom htmlize-replace-form-feeds t
- "*Non-nil means replace form feeds in source code with HTML separators.
-Form feeds are the ^L characters at line beginnings that are sometimes
-used to separate sections of source code. If this variable is set to
-`t', form feed characters are replaced with the <hr> separator. If this
-is a string, it specifies the replacement to use. Note that <pre> is
-temporarily closed before the separator is inserted, so the default
-replacement is effectively \"</pre><hr /><pre>\". If you specify
-another replacement, don't forget to close and reopen the <pre> if you
-want the output to remain valid HTML.
-
-If you need more elaborate processing, set this to nil and use
-htmlize-after-hook."
- :type 'boolean
- :group 'htmlize)
-
-(defcustom htmlize-html-charset nil
- "*The charset declared by the resulting HTML documents.
-When non-nil, causes htmlize to insert the following in the HEAD section
-of the generated HTML:
-
- <meta http-equiv=\"Content-Type\" content=\"text/html; charset=CHARSET\">
-
-where CHARSET is the value you've set for htmlize-html-charset. Valid
-charsets are defined by MIME and include strings like \"iso-8859-1\",
-\"iso-8859-15\", \"utf-8\", etc.
-
-If you are using non-Latin-1 charsets, you might need to set this for
-your documents to render correctly. Also, the W3C validator requires
-submitted HTML documents to declare a charset. So if you care about
-validation, you can use this to prevent the validator from bitching.
-
-Needless to say, if you set this, you should actually make sure that
-the buffer is in the encoding you're claiming it is in. (Under Mule
-that is done by ensuring the correct \"file coding system\" for the
-buffer.) If you don't understand what that means, this option is
-probably not for you."
- :type '(choice (const :tag "Unset" nil)
- string)
- :group 'htmlize)
-
-(defcustom htmlize-convert-nonascii-to-entities (featurep 'mule)
- "*Whether non-ASCII characters should be converted to HTML entities.
-
-When this is non-nil, characters with codes in the 128-255 range will be
-considered Latin 1 and rewritten as \"&#CODE;\". Characters with codes
-above 255 will be converted to \"&#UCS;\", where UCS denotes the Unicode
-code point of the character. If the code point cannot be determined,
-the character will be copied unchanged, as would be the case if the
-option were nil.
-
-When the option is nil, the non-ASCII characters are copied to HTML
-without modification. In that case, the web server and/or the browser
-must be set to understand the encoding that was used when saving the
-buffer. (You might also want to specify it by setting
-`htmlize-html-charset'.)
-
-Note that in an HTML entity \"&#CODE;\", CODE is always a UCS code point,
-which has nothing to do with the charset the page is in. For example,
-\"&#169;\" *always* refers to the copyright symbol, regardless of charset
-specified by the META tag or the charset sent by the HTTP server. In
-other words, \"&#169;\" is exactly equivalent to \"&copy;\".
-
-By default, entity conversion is turned on for Mule-enabled Emacsen and
-turned off otherwise. This is because Mule knows the charset of
-non-ASCII characters in the buffer. A non-Mule Emacs cannot tell
-whether a character with code 0xA9 represents Latin 1 copyright symbol,
-Latin 2 \"S with caron\", or something else altogether. Setting this to
-t without Mule means asserting that 128-255 characters always mean Latin
-1.
-
-For most people htmlize will work fine with this option left at the
-default setting; don't change it unless you know what you're doing."
- :type 'sexp
- :group 'htmlize)
-
-(defcustom htmlize-ignore-face-size 'absolute
- "*Whether face size should be ignored when generating HTML.
-If this is nil, face sizes are used. If set to t, sizes are ignored
-If set to `absolute', only absolute size specifications are ignored.
-Please note that font sizes only work with CSS-based output types."
- :type '(choice (const :tag "Don't ignore" nil)
- (const :tag "Ignore all" t)
- (const :tag "Ignore absolute" absolute))
- :group 'htmlize)
-
-(defcustom htmlize-css-name-prefix ""
- "*The prefix used for CSS names.
-The CSS names that htmlize generates from face names are often too
-generic for CSS files; for example, `font-lock-type-face' is transformed
-to `type'. Use this variable to add a prefix to the generated names.
-The string \"htmlize-\" is an example of a reasonable prefix."
- :type 'string
- :group 'htmlize)
-
-(defcustom htmlize-use-rgb-txt t
- "*Whether `rgb.txt' should be used to convert color names to RGB.
-
-This conversion means determining, for instance, that the color
-\"IndianRed\" corresponds to the (205, 92, 92) RGB triple. `rgb.txt'
-is the X color database that maps hundreds of color names to such RGB
-triples. When this variable is non-nil, `htmlize' uses `rgb.txt' to
-look up color names.
-
-If this variable is nil, htmlize queries Emacs for RGB components of
-colors using `color-instance-rgb-components' and `x-color-values'.
-This can yield incorrect results on non-true-color displays.
-
-If the `rgb.txt' file is not found (which will be the case if you're
-running Emacs on non-X11 systems), this option is ignored."
- :type 'boolean
- :group 'htmlize)
-
-(defcustom htmlize-html-major-mode nil
- "The mode the newly created HTML buffer will be put in.
-Set this to nil if you prefer the default (fundamental) mode."
- :type '(radio (const :tag "No mode (fundamental)" nil)
- (function-item html-mode)
- (function :tag "User-defined major mode"))
- :group 'htmlize)
-
-(defvar htmlize-before-hook nil
- "Hook run before htmlizing a buffer.
-The hook functions are run in the source buffer (not the resulting HTML
-buffer).")
-
-(defvar htmlize-after-hook nil
- "Hook run after htmlizing a buffer.
-Unlike `htmlize-before-hook', these functions are run in the generated
-HTML buffer. You may use them to modify the outlook of the final HTML
-output.")
-
-(defvar htmlize-file-hook nil
- "Hook run by `htmlize-file' after htmlizing a file, but before saving it.")
-
-(defvar htmlize-buffer-places)
-
-;;; Some cross-Emacs compatibility.
-
-;; I try to conditionalize on features rather than Emacs version, but
-;; in some cases checking against the version *is* necessary.
-(defconst htmlize-running-xemacs (string-match "XEmacs" emacs-version))
-
-(eval-and-compile
- ;; save-current-buffer, with-current-buffer, and with-temp-buffer
- ;; are not available in 19.34 and in older XEmacsen. Strictly
- ;; speaking, we should stick to our own namespace and define and use
- ;; htmlize-save-current-buffer, etc. But non-standard special forms
- ;; are a pain because they're not properly fontified or indented and
- ;; because they look weird and ugly. So I'll just go ahead and
- ;; define the real ones if they're not available. If someone
- ;; convinces me that this breaks something, I'll switch to the
- ;; "htmlize-" namespace.
- (unless (fboundp 'save-current-buffer)
- (defmacro save-current-buffer (&rest forms)
- `(let ((__scb_current (current-buffer)))
- (unwind-protect
- (progn ,@forms)
- (set-buffer __scb_current)))))
- (unless (fboundp 'with-current-buffer)
- (defmacro with-current-buffer (buffer &rest forms)
- `(save-current-buffer (set-buffer ,buffer) ,@forms)))
- (unless (fboundp 'with-temp-buffer)
- (defmacro with-temp-buffer (&rest forms)
- (let ((temp-buffer (gensym "tb-")))
- `(let ((,temp-buffer
- (get-buffer-create (generate-new-buffer-name " *temp*"))))
- (unwind-protect
- (with-current-buffer ,temp-buffer
- ,@forms)
- (and (buffer-live-p ,temp-buffer)
- (kill-buffer ,temp-buffer))))))))
-
-;; We need a function that efficiently finds the next change of a
-;; property (usually `face'), preferably regardless of whether the
-;; change occurred because of a text property or an extent/overlay.
-;; As it turns out, it is not easy to do that compatibly.
-;;
-;; Under XEmacs, `next-single-property-change' does that. Under GNU
-;; Emacs beginning with version 21, `next-single-char-property-change'
-;; is available and does the same. GNU Emacs 20 had
-;; `next-char-property-change', which we can use. GNU Emacs 19 didn't
-;; provide any means for simultaneously examining overlays and text
-;; properties, so when using Emacs 19.34, we punt and fall back to
-;; `next-single-property-change', thus ignoring overlays altogether.
-
-(cond
- (htmlize-running-xemacs
- ;; XEmacs: good.
- (defun htmlize-next-change (pos prop &optional limit)
- (next-single-property-change pos prop nil (or limit (point-max)))))
- ((fboundp 'next-single-char-property-change)
- ;; GNU Emacs 21: good.
- (defun htmlize-next-change (pos prop &optional limit)
- (next-single-char-property-change pos prop nil limit)))
- ((fboundp 'next-char-property-change)
- ;; GNU Emacs 20: bad, but fixable.
- (defun htmlize-next-change (pos prop &optional limit)
- (let ((done nil)
- (current-value (get-char-property pos prop))
- newpos next-value)
- ;; Loop over positions returned by next-char-property-change
- ;; until the value of PROP changes or we've hit EOB.
- (while (not done)
- (setq newpos (next-char-property-change pos limit)
- next-value (get-char-property newpos prop))
- (cond ((eq newpos pos)
- ;; Possibly at EOB? Whatever, just don't infloop.
- (setq done t))
- ((eq next-value current-value)
- ;; PROP hasn't changed -- keep looping.
- )
- (t
- (setq done t)))
- (setq pos newpos))
- pos)))
- (t
- ;; GNU Emacs 19.34: hopeless, cannot properly support overlays.
- (defun htmlize-next-change (pos prop &optional limit)
- (unless limit
- (setq limit (point-max)))
- (let ((res (next-single-property-change pos prop)))
- (if (or (null res)
- (> res limit))
- limit
- res)))))
-
-;;; Transformation of buffer text: HTML escapes, untabification, etc.
-
-(defvar htmlize-basic-character-table
- ;; Map characters in the 0-127 range to either one-character strings
- ;; or to numeric entities.
- (let ((table (make-vector 128 ?\0)))
- ;; Map characters in the 32-126 range to themselves, others to
- ;; &#CODE entities;
- (dotimes (i 128)
- (setf (aref table i) (if (and (>= i 32) (<= i 126))
- (char-to-string i)
- (format "&#%d;" i))))
- ;; Set exceptions manually.
- (setf
- ;; Don't escape newline, carriage return, and TAB.
- (aref table ?\n) "\n"
- (aref table ?\r) "\r"
- (aref table ?\t) "\t"
- ;; Escape &, <, and >.
- (aref table ?&) "&amp;"
- (aref table ?<) "&lt;"
- (aref table ?>) "&gt;"
- ;; Not escaping '"' buys us a measurable speedup. It's only
- ;; necessary to quote it for strings used in attribute values,
- ;; which htmlize doesn't do.
- ;(aref table ?\") "&quot;"
- )
- table))
-
-;; A cache of HTML representation of non-ASCII characters. Depending
-;; on availability of `encode-char' and the setting of
-;; `htmlize-convert-nonascii-to-entities', this maps non-ASCII
-;; characters to either "&#<code>;" or "<char>" (mapconcat's mapper
-;; must always return strings). It's only filled as characters are
-;; encountered, so that in a buffer with e.g. French text, it will
-;; only ever contain French accented characters as keys. It's cleared
-;; on each entry to htmlize-buffer-1 to allow modifications of
-;; `htmlize-convert-nonascii-to-entities' to take effect.
-(defvar htmlize-extended-character-cache (make-hash-table :test 'eq))
-
-(defun htmlize-protect-string (string)
- "HTML-protect string, escaping HTML metacharacters and I18N chars."
- ;; Only protecting strings that actually contain unsafe or non-ASCII
- ;; chars removes a lot of unnecessary funcalls and consing.
- (if (not (string-match "[^\r\n\t -%'-;=?-~]" string))
- string
- (mapconcat (lambda (char)
- (cond
- ((< char 128)
- ;; ASCII: use htmlize-basic-character-table.
- (aref htmlize-basic-character-table char))
- ((gethash char htmlize-extended-character-cache)
- ;; We've already seen this char; return the cached
- ;; string.
- )
- ((not htmlize-convert-nonascii-to-entities)
- ;; If conversion to entities is not desired, always
- ;; copy the char literally.
- (setf (gethash char htmlize-extended-character-cache)
- (char-to-string char)))
- ((< char 256)
- ;; Latin 1: no need to call encode-char.
- (setf (gethash char htmlize-extended-character-cache)
- (format "&#%d;" char)))
- ((and (fboundp 'encode-char)
- ;; Must check if encode-char works for CHAR;
- ;; it fails for Arabic and possibly elsewhere.
- (encode-char char 'ucs))
- (setf (gethash char htmlize-extended-character-cache)
- (format "&#%d;" (encode-char char 'ucs))))
- (t
- ;; encode-char doesn't work for this char. Copy it
- ;; unchanged and hope for the best.
- (setf (gethash char htmlize-extended-character-cache)
- (char-to-string char)))))
- string "")))
-
-(defconst htmlize-ellipsis "...")
-(put-text-property 0 (length htmlize-ellipsis) 'htmlize-ellipsis t htmlize-ellipsis)
-
-(defun htmlize-buffer-substring-no-invisible (beg end)
- ;; Like buffer-substring-no-properties, but don't copy invisible
- ;; parts of the region. Where buffer-substring-no-properties
- ;; mandates an ellipsis to be shown, htmlize-ellipsis is inserted.
- (let ((pos beg)
- visible-list invisible show next-change)
- ;; Iterate over the changes in the `invisible' property and filter
- ;; out the portions where it's non-nil, i.e. where the text is
- ;; invisible.
- (while (< pos end)
- (setq invisible (get-char-property pos 'invisible)
- next-change (htmlize-next-change pos 'invisible end))
- (if (not (listp buffer-invisibility-spec))
- ;; If buffer-invisibility-spec is not a list, then all
- ;; characters with non-nil `invisible' property are visible.
- (setq show (not invisible))
- ;; Otherwise, the value of a non-nil `invisible' property can be:
- ;; 1. a symbol -- make the text invisible if it matches
- ;; buffer-invisibility-spec.
- ;; 2. a list of symbols -- make the text invisible if
- ;; any symbol in the list matches
- ;; buffer-invisibility-spec.
- ;; If the match of buffer-invisibility-spec has a non-nil
- ;; CDR, replace the invisible text with an ellipsis.
- (let (match)
- (if (symbolp invisible)
- (setq match (member* invisible buffer-invisibility-spec
- :key (lambda (i)
- (if (symbolp i) i (car i)))))
- (setq match (block nil
- (dolist (elem invisible)
- (let ((m (member*
- elem buffer-invisibility-spec
- :key (lambda (i)
- (if (symbolp i) i (car i))))))
- (when m (return m))))
- nil)))
- (setq show (cond ((null match) t)
- ((and (cdr-safe (car match))
- ;; Conflate successive ellipses.
- (not (eq show htmlize-ellipsis)))
- htmlize-ellipsis)
- (t nil)))))
- (cond ((eq show t)
- (push (buffer-substring-no-properties pos next-change) visible-list))
- ((stringp show)
- (push show visible-list)))
- (setq pos next-change))
- (if (= (length visible-list) 1)
- ;; If VISIBLE-LIST consists of only one element, return it
- ;; without concatenation. This avoids additional consing in
- ;; regions without any invisible text.
- (car visible-list)
- (apply #'concat (nreverse visible-list)))))
-
-(defun htmlize-trim-ellipsis (text)
- ;; Remove htmlize-ellipses ("...") from the beginning of TEXT if it
- ;; starts with it. It checks for the special property of the
- ;; ellipsis so it doesn't work on ordinary text that begins with
- ;; "...".
- (if (get-text-property 0 'htmlize-ellipsis text)
- (substring text (length htmlize-ellipsis))
- text))
-
-(defconst htmlize-tab-spaces
- ;; A table of strings with spaces. (aref htmlize-tab-spaces 5) is
- ;; like (make-string 5 ?\ ), except it doesn't cons.
- (let ((v (make-vector 32 nil)))
- (dotimes (i (length v))
- (setf (aref v i) (make-string i ?\ )))
- v))
-
-(defun htmlize-untabify (text start-column)
- "Untabify TEXT, assuming it starts at START-COLUMN."
- (let ((column start-column)
- (last-match 0)
- (chunk-start 0)
- chunks match-pos tab-size)
- (while (string-match "[\t\n]" text last-match)
- (setq match-pos (match-beginning 0))
- (cond ((eq (aref text match-pos) ?\t)
- ;; Encountered a tab: create a chunk of text followed by
- ;; the expanded tab.
- (push (substring text chunk-start match-pos) chunks)
- ;; Increase COLUMN by the length of the text we've
- ;; skipped since last tab or newline. (Encountering
- ;; newline resets it.)
- (incf column (- match-pos last-match))
- ;; Calculate tab size based on tab-width and COLUMN.
- (setq tab-size (- tab-width (% column tab-width)))
- ;; Expand the tab.
- (push (aref htmlize-tab-spaces tab-size) chunks)
- (incf column tab-size)
- (setq chunk-start (1+ match-pos)))
- (t
- ;; Reset COLUMN at beginning of line.
- (setq column 0)))
- (setq last-match (1+ match-pos)))
- ;; If no chunks have been allocated, it means there have been no
- ;; tabs to expand. Return TEXT unmodified.
- (if (null chunks)
- text
- (when (< chunk-start (length text))
- ;; Push the remaining chunk.
- (push (substring text chunk-start) chunks))
- ;; Generate the output from the available chunks.
- (apply #'concat (nreverse chunks)))))
-
-(defun htmlize-despam-address (string)
- "Replace every occurrence of '@' in STRING with &#64;.
-`htmlize-make-hyperlinks' uses this to spam-protect mailto links
-without modifying their meaning."
- ;; Suggested by Ville Skytta.
- (while (string-match "@" string)
- (setq string (replace-match "&#64;" nil t string)))
- string)
-
-(defun htmlize-make-hyperlinks ()
- "Make hyperlinks in HTML."
- ;; Function originally submitted by Ville Skytta. Rewritten by
- ;; Hrvoje Niksic, then modified by Ville Skytta and Hrvoje Niksic.
- (goto-char (point-min))
- (while (re-search-forward
- "&lt;\\(\\(mailto:\\)?\\([-=+_.a-zA-Z0-9]+@[-_.a-zA-Z0-9]+\\)\\)&gt;"
- nil t)
- (let ((address (match-string 3))
- (link-text (match-string 1)))
- (delete-region (match-beginning 0) (match-end 0))
- (insert "&lt;<a href=\"mailto:"
- (htmlize-despam-address address)
- "\">"
- (htmlize-despam-address link-text)
- "</a>&gt;")))
- (goto-char (point-min))
- (while (re-search-forward "&lt;\\(\\(URL:\\)?\\([a-zA-Z]+://[^;]+\\)\\)&gt;"
- nil t)
- (let ((url (match-string 3))
- (link-text (match-string 1)))
- (delete-region (match-beginning 0) (match-end 0))
- (insert "&lt;<a href=\"" url "\">" link-text "</a>&gt;"))))
-
-;; Tests for htmlize-make-hyperlinks:
-
-;; <mailto:hniksic@xemacs.org>
-;; <http://fly.srk.fer.hr>
-;; <URL:http://www.xemacs.org>
-;; <http://www.mail-archive.com/bbdb-info@xemacs.org/>
-;; <hniksic@xemacs.org>
-;; <xalan-dev-sc.10148567319.hacuhiucknfgmpfnjcpg-john=doe.com@xml.apache.org>
-
-(defun htmlize-defang-local-variables ()
- ;; Juri Linkov reports that an HTML-ized "Local variables" can lead
- ;; visiting the HTML to fail with "Local variables list is not
- ;; properly terminated". He suggested changing the phrase to
- ;; syntactically equivalent HTML that Emacs doesn't recognize.
- (goto-char (point-min))
- (while (search-forward "Local Variables:" nil t)
- (replace-match "Local Variables&#58;" nil t)))
-
-
-;;; Color handling.
-
-(if (fboundp 'locate-file)
- (defalias 'htmlize-locate-file 'locate-file)
- (defun htmlize-locate-file (file path)
- (dolist (dir path nil)
- (when (file-exists-p (expand-file-name file dir))
- (return (expand-file-name file dir))))))
-
-(defvar htmlize-x-library-search-path
- '("/usr/X11R6/lib/X11/"
- "/usr/X11R5/lib/X11/"
- "/usr/lib/X11R6/X11/"
- "/usr/lib/X11R5/X11/"
- "/usr/local/X11R6/lib/X11/"
- "/usr/local/X11R5/lib/X11/"
- "/usr/local/lib/X11R6/X11/"
- "/usr/local/lib/X11R5/X11/"
- "/usr/X11/lib/X11/"
- "/usr/lib/X11/"
- "/usr/local/lib/X11/"
- "/usr/X386/lib/X11/"
- "/usr/x386/lib/X11/"
- "/usr/XFree86/lib/X11/"
- "/usr/unsupported/lib/X11/"
- "/usr/athena/lib/X11/"
- "/usr/local/x11r5/lib/X11/"
- "/usr/lpp/Xamples/lib/X11/"
- "/usr/openwin/lib/X11/"
- "/usr/openwin/share/lib/X11/"))
-
-(defun htmlize-get-color-rgb-hash (&optional rgb-file)
- "Return a hash table mapping X color names to RGB values.
-The keys in the hash table are X11 color names, and the values are the
-#rrggbb RGB specifications, extracted from `rgb.txt'.
-
-If RGB-FILE is nil, the function will try hard to find a suitable file
-in the system directories.
-
-If no rgb.txt file is found, return nil."
- (let ((rgb-file (or rgb-file (htmlize-locate-file
- "rgb.txt"
- htmlize-x-library-search-path)))
- (hash nil))
- (when rgb-file
- (with-temp-buffer
- (insert-file-contents rgb-file)
- (setq hash (make-hash-table :test 'equal))
- (while (not (eobp))
- (cond ((looking-at "^\\s-*\\([!#]\\|$\\)")
- ;; Skip comments and empty lines.
- )
- ((looking-at
- "[ \t]*\\([0-9]+\\)[ \t]+\\([0-9]+\\)[ \t]+\\([0-9]+\\)[ \t]+\\(.*\\)")
- (setf (gethash (downcase (match-string 4)) hash)
- (format "#%02x%02x%02x"
- (string-to-number (match-string 1))
- (string-to-number (match-string 2))
- (string-to-number (match-string 3)))))
- (t
- (error
- "Unrecognized line in %s: %s"
- rgb-file
- (buffer-substring (point) (progn (end-of-line) (point))))))
- (forward-line 1))))
- hash))
-
-;; Compile the RGB map when loaded. On systems where rgb.txt is
-;; missing, the value of the variable will be nil, and rgb.txt will
-;; not be used.
-(defvar htmlize-color-rgb-hash (htmlize-get-color-rgb-hash))
-
-;;; Face handling.
-
-(defun htmlize-face-specifies-property (face prop)
- ;; Return t if face specifies PROP, as opposed to it being inherited
- ;; from the default face. The problem with e.g.
- ;; `face-foreground-instance' is that it returns an instance for
- ;; EVERY face because every face inherits from the default face.
- ;; However, we'd like htmlize-face-{fore,back}ground to return nil
- ;; when called with a face that doesn't specify its own foreground
- ;; or background.
- (or (eq face 'default)
- (assq 'global (specifier-spec-list (face-property face prop)))))
-
-(defun htmlize-face-color-internal (face fg)
- ;; Used only under GNU Emacs. Return the color of FACE, but don't
- ;; return "unspecified-fg" or "unspecified-bg". If the face is
- ;; `default' and the color is unspecified, look up the color in
- ;; frame parameters.
- (let* ((function (if fg #'face-foreground #'face-background))
- color)
- (if (>= emacs-major-version 22)
- ;; For GNU Emacs 22+ set INHERIT to get the inherited values.
- (setq color (funcall function face nil t))
- (setq color (funcall function face))
- ;; For GNU Emacs 21 (which has `face-attribute'): if the color
- ;; is nil, recursively check for the face's parent.
- (when (and (null color)
- (fboundp 'face-attribute)
- (face-attribute face :inherit)
- (not (eq (face-attribute face :inherit) 'unspecified)))
- (setq color (htmlize-face-color-internal
- (face-attribute face :inherit) fg))))
- (when (and (eq face 'default) (null color))
- (setq color (cdr (assq (if fg 'foreground-color 'background-color)
- (frame-parameters)))))
- (when (or (eq color 'unspecified)
- (equal color "unspecified-fg")
- (equal color "unspecified-bg"))
- (setq color nil))
- (when (and (eq face 'default)
- (null color))
- ;; Assuming black on white doesn't seem right, but I can't think
- ;; of anything better to do.
- (setq color (if fg "black" "white")))
- color))
-
-(defun htmlize-face-foreground (face)
- ;; Return the name of the foreground color of FACE. If FACE does
- ;; not specify a foreground color, return nil.
- (cond (htmlize-running-xemacs
- ;; XEmacs.
- (and (htmlize-face-specifies-property face 'foreground)
- (color-instance-name (face-foreground-instance face))))
- (t
- ;; GNU Emacs.
- (htmlize-face-color-internal face t))))
-
-(defun htmlize-face-background (face)
- ;; Return the name of the background color of FACE. If FACE does
- ;; not specify a background color, return nil.
- (cond (htmlize-running-xemacs
- ;; XEmacs.
- (and (htmlize-face-specifies-property face 'background)
- (color-instance-name (face-background-instance face))))
- (t
- ;; GNU Emacs.
- (htmlize-face-color-internal face nil))))
-
-;; Convert COLOR to the #RRGGBB string. If COLOR is already in that
-;; format, it's left unchanged.
-
-(defun htmlize-color-to-rgb (color)
- (let ((rgb-string nil))
- (cond ((null color)
- ;; Ignore nil COLOR because it means that the face is not
- ;; specifying any color. Hence (htmlize-color-to-rgb nil)
- ;; returns nil.
- )
- ((string-match "\\`#" color)
- ;; The color is already in #rrggbb format.
- (setq rgb-string color))
- ((and htmlize-use-rgb-txt
- htmlize-color-rgb-hash)
- ;; Use of rgb.txt is requested, and it's available on the
- ;; system. Use it.
- (setq rgb-string (gethash (downcase color) htmlize-color-rgb-hash)))
- (t
- ;; We're getting the RGB components from Emacs.
- (let ((rgb
- ;; Here I cannot conditionalize on (fboundp ...)
- ;; because ps-print under some versions of GNU Emacs
- ;; defines its own dummy version of
- ;; `color-instance-rgb-components'.
- (if htmlize-running-xemacs
- (mapcar (lambda (arg)
- (/ arg 256))
- (color-instance-rgb-components
- (make-color-instance color)))
- (mapcar (lambda (arg)
- (/ arg 256))
- (x-color-values color)))))
- (when rgb
- (setq rgb-string (apply #'format "#%02x%02x%02x" rgb))))))
- ;; If RGB-STRING is still nil, it means the color cannot be found,
- ;; for whatever reason. In that case just punt and return COLOR.
- ;; Most browsers support a decent set of color names anyway.
- (or rgb-string color)))
-
-;; We store the face properties we care about into an
-;; `htmlize-fstruct' type. That way we only have to analyze face
-;; properties, which can be time consuming, once per each face. The
-;; mapping between Emacs faces and htmlize-fstructs is established by
-;; htmlize-make-face-map. The name "fstruct" refers to variables of
-;; type `htmlize-fstruct', while the term "face" is reserved for Emacs
-;; faces.
-
-(defstruct htmlize-fstruct
- foreground ; foreground color, #rrggbb
- background ; background color, #rrggbb
- size ; size
- boldp ; whether face is bold
- italicp ; whether face is italic
- underlinep ; whether face is underlined
- overlinep ; whether face is overlined
- strikep ; whether face is struck through
- css-name ; CSS name of face
- )
-
-(defun htmlize-face-emacs21-attr (fstruct attr value)
- ;; For ATTR and VALUE, set the equivalent value in FSTRUCT.
- (case attr
- (:foreground
- (setf (htmlize-fstruct-foreground fstruct) (htmlize-color-to-rgb value)))
- (:background
- (setf (htmlize-fstruct-background fstruct) (htmlize-color-to-rgb value)))
- (:height
- (setf (htmlize-fstruct-size fstruct) value))
- (:weight
- (when (string-match (symbol-name value) "bold")
- (setf (htmlize-fstruct-boldp fstruct) t)))
- (:slant
- (setf (htmlize-fstruct-italicp fstruct) (or (eq value 'italic)
- (eq value 'oblique))))
- (:bold
- (setf (htmlize-fstruct-boldp fstruct) value))
- (:italic
- (setf (htmlize-fstruct-italicp fstruct) value))
- (:underline
- (setf (htmlize-fstruct-underlinep fstruct) value))
- (:overline
- (setf (htmlize-fstruct-overlinep fstruct) value))
- (:strike-through
- (setf (htmlize-fstruct-strikep fstruct) value))))
-
-(defun htmlize-face-size (face)
- ;; The size (height) of FACE, taking inheritance into account.
- ;; Only works in Emacs 21 and later.
- (let ((size-list
- (loop
- for f = face then (ignore-errors (face-attribute f :inherit)) ;?????
- until (or (not f) (eq f 'unspecified))
- for h = (ignore-errors (face-attribute f :height)) ;???????
- collect (if (eq h 'unspecified) nil h))))
- (reduce 'htmlize-merge-size (cons nil size-list))))
-
-(defun htmlize-face-to-fstruct (face)
- "Convert Emacs face FACE to fstruct."
- (let ((fstruct (make-htmlize-fstruct
- :foreground (htmlize-color-to-rgb
- (htmlize-face-foreground face))
- :background (htmlize-color-to-rgb
- (htmlize-face-background face)))))
- (cond (htmlize-running-xemacs
- ;; XEmacs doesn't provide a way to detect whether a face is
- ;; bold or italic, so we need to examine the font instance.
- ;; #### This probably doesn't work under MS Windows and/or
- ;; GTK devices. I'll need help with those.
- (let* ((font-instance (face-font-instance face))
- (props (font-instance-properties font-instance)))
- (when (equalp (cdr (assq 'WEIGHT_NAME props)) "bold")
- (setf (htmlize-fstruct-boldp fstruct) t))
- (when (or (equalp (cdr (assq 'SLANT props)) "i")
- (equalp (cdr (assq 'SLANT props)) "o"))
- (setf (htmlize-fstruct-italicp fstruct) t))
- (setf (htmlize-fstruct-strikep fstruct)
- (face-strikethru-p face))
- (setf (htmlize-fstruct-underlinep fstruct)
- (face-underline-p face))))
- ((fboundp 'face-attribute)
- ;; GNU Emacs 21 and further.
- (dolist (attr '(:weight :slant :underline :overline :strike-through))
- (let ((value (if (>= emacs-major-version 22)
- ;; Use the INHERIT arg in GNU Emacs 22.
- (face-attribute face attr nil t)
- ;; Otherwise, fake it.
- (let ((face face))
- (while (and (eq (face-attribute face attr)
- 'unspecified)
- (not (eq (face-attribute face :inherit)
- 'unspecified)))
- (setq face (face-attribute face :inherit)))
- (face-attribute face attr)))))
- (when (and value (not (eq value 'unspecified)))
- (htmlize-face-emacs21-attr fstruct attr value))))
- (let ((size (htmlize-face-size face)))
- (unless (eql size 1.0) ; ignore non-spec
- (setf (htmlize-fstruct-size fstruct) size))))
- (t
- ;; Older GNU Emacs. Some of these functions are only
- ;; available under Emacs 20+, hence the guards.
- (when (fboundp 'face-bold-p)
- (setf (htmlize-fstruct-boldp fstruct) (face-bold-p face)))
- (when (fboundp 'face-italic-p)
- (setf (htmlize-fstruct-italicp fstruct) (face-italic-p face)))
- (setf (htmlize-fstruct-underlinep fstruct)
- (face-underline-p face))))
- ;; Generate the css-name property. Emacs places no restrictions
- ;; on the names of symbols that represent faces -- any characters
- ;; may be in the name, even ^@. We try hard to beat the face name
- ;; into shape, both esthetically and according to CSS1 specs.
- (setf (htmlize-fstruct-css-name fstruct)
- (let ((name (downcase (symbol-name face))))
- (when (string-match "\\`font-lock-" name)
- ;; Change font-lock-FOO-face to FOO.
- (setq name (replace-match "" t t name)))
- (when (string-match "-face\\'" name)
- ;; Drop the redundant "-face" suffix.
- (setq name (replace-match "" t t name)))
- (while (string-match "[^-a-zA-Z0-9]" name)
- ;; Drop the non-alphanumerics.
- (setq name (replace-match "X" t t name)))
- (when (string-match "\\`[-0-9]" name)
- ;; CSS identifiers may not start with a digit.
- (setq name (concat "X" name)))
- ;; After these transformations, the face could come
- ;; out empty.
- (when (equal name "")
- (setq name "face"))
- ;; Apply the prefix.
- (setq name (concat htmlize-css-name-prefix name))
- name))
- fstruct))
-
-(defmacro htmlize-copy-attr-if-set (attr-list dest source)
- ;; Expand the code of the type
- ;; (and (htmlize-fstruct-ATTR source)
- ;; (setf (htmlize-fstruct-ATTR dest) (htmlize-fstruct-ATTR source)))
- ;; for the given list of boolean attributes.
- (cons 'progn
- (loop for attr in attr-list
- for attr-sym = (intern (format "htmlize-fstruct-%s" attr))
- collect `(and (,attr-sym ,source)
- (setf (,attr-sym ,dest) (,attr-sym ,source))))))
-
-(defun htmlize-merge-size (merged next)
- ;; Calculate the size of the merge of MERGED and NEXT.
- (cond ((null merged) next)
- ((integerp next) next)
- ((null next) merged)
- ((floatp merged) (* merged next))
- ((integerp merged) (round (* merged next)))))
-
-(defun htmlize-merge-two-faces (merged next)
- (htmlize-copy-attr-if-set
- (foreground background boldp italicp underlinep overlinep strikep)
- merged next)
- (setf (htmlize-fstruct-size merged)
- (htmlize-merge-size (htmlize-fstruct-size merged)
- (htmlize-fstruct-size next)))
- merged)
-
-(defun htmlize-merge-faces (fstruct-list)
- (cond ((null fstruct-list)
- ;; Nothing to do, return a dummy face.
- (make-htmlize-fstruct))
- ((null (cdr fstruct-list))
- ;; Optimize for the common case of a single face, simply
- ;; return it.
- (car fstruct-list))
- (t
- (reduce #'htmlize-merge-two-faces
- (cons (make-htmlize-fstruct) fstruct-list)))))
-
-;; GNU Emacs 20+ supports attribute lists in `face' properties. For
-;; example, you can use `(:foreground "red" :weight bold)' as an
-;; overlay's "face", or you can even use a list of such lists, etc.
-;; We call those "attrlists".
-;;
-;; htmlize supports attrlist by converting them to fstructs, the same
-;; as with regular faces.
-
-(defun htmlize-attrlist-to-fstruct (attrlist)
- ;; Like htmlize-face-to-fstruct, but accepts an ATTRLIST as input.
- (let ((fstruct (make-htmlize-fstruct)))
- (cond ((eq (car attrlist) 'foreground-color)
- ;; ATTRLIST is (foreground-color . COLOR)
- (setf (htmlize-fstruct-foreground fstruct)
- (htmlize-color-to-rgb (cdr attrlist))))
- ((eq (car attrlist) 'background-color)
- ;; ATTRLIST is (background-color . COLOR)
- (setf (htmlize-fstruct-background fstruct)
- (htmlize-color-to-rgb (cdr attrlist))))
- (t
- ;; ATTRLIST is a plist.
- (while attrlist
- (let ((attr (pop attrlist))
- (value (pop attrlist)))
- (when (and value (not (eq value 'unspecified)))
- (htmlize-face-emacs21-attr fstruct attr value))))))
- (setf (htmlize-fstruct-css-name fstruct) "ATTRLIST")
- fstruct))
-
-(defun htmlize-face-list-p (face-prop)
- "Return non-nil if FACE-PROP is a list of faces, nil otherwise."
- ;; If not for attrlists, this would return (listp face-prop). This
- ;; way we have to be more careful because attrlist is also a list!
- (cond
- ((eq face-prop nil)
- ;; FACE-PROP being nil means empty list (no face), so return t.
- t)
- ((symbolp face-prop)
- ;; A symbol other than nil means that it's only one face, so return
- ;; nil.
- nil)
- ((not (consp face-prop))
- ;; Huh? Not a symbol or cons -- treat it as a single element.
- nil)
- (t
- ;; We know that FACE-PROP is a cons: check whether it looks like an
- ;; ATTRLIST.
- (let* ((car (car face-prop))
- (attrlist-p (and (symbolp car)
- (or (eq car 'foreground-color)
- (eq car 'background-color)
- (eq (aref (symbol-name car) 0) ?:)))))
- ;; If FACE-PROP is not an ATTRLIST, it means it's a list of
- ;; faces.
- (not attrlist-p)))))
-
-(defun htmlize-make-face-map (faces)
- ;; Return a hash table mapping Emacs faces to htmlize's fstructs.
- ;; The keys are either face symbols or attrlists, so the test
- ;; function must be `equal'.
- (let ((face-map (make-hash-table :test 'equal))
- css-names)
- (dolist (face faces)
- (unless (gethash face face-map)
- ;; Haven't seen FACE yet; convert it to an fstruct and cache
- ;; it.
- (let ((fstruct (if (symbolp face)
- (htmlize-face-to-fstruct face)
- (htmlize-attrlist-to-fstruct face))))
- (setf (gethash face face-map) fstruct)
- (let* ((css-name (htmlize-fstruct-css-name fstruct))
- (new-name css-name)
- (i 0))
- ;; Uniquify the face's css-name by using NAME-1, NAME-2,
- ;; etc.
- (while (member new-name css-names)
- (setq new-name (format "%s-%s" css-name (incf i))))
- (unless (equal new-name css-name)
- (setf (htmlize-fstruct-css-name fstruct) new-name))
- (push new-name css-names)))))
- face-map))
-
-(defun htmlize-unstringify-face (face)
- "If FACE is a string, return it interned, otherwise return it unchanged."
- (if (stringp face)
- (intern face)
- face))
-
-(defun htmlize-faces-in-buffer ()
- "Return a list of faces used in the current buffer.
-Under XEmacs, this returns the set of faces specified by the extents
-with the `face' property. (This covers text properties as well.) Under
-GNU Emacs, it returns the set of faces specified by the `face' text
-property and by buffer overlays that specify `face'."
- (let (faces)
- ;; Testing for (fboundp 'map-extents) doesn't work because W3
- ;; defines `map-extents' under FSF.
- (if htmlize-running-xemacs
- (let (face-prop)
- (map-extents (lambda (extent ignored)
- (setq face-prop (extent-face extent)
- ;; FACE-PROP can be a face or a list of
- ;; faces.
- faces (if (listp face-prop)
- (union face-prop faces)
- (adjoin face-prop faces)))
- nil)
- nil
- ;; Specify endpoints explicitly to respect
- ;; narrowing.
- (point-min) (point-max) nil nil 'face))
- ;; FSF Emacs code.
- ;; Faces used by text properties.
- (let ((pos (point-min)) face-prop next)
- (while (< pos (point-max))
- (setq face-prop (get-text-property pos 'face)
- next (or (next-single-property-change pos 'face) (point-max)))
- ;; FACE-PROP can be a face/attrlist or a list thereof.
- (setq faces (if (htmlize-face-list-p face-prop)
- (nunion (mapcar #'htmlize-unstringify-face face-prop)
- faces :test 'equal)
- (adjoin (htmlize-unstringify-face face-prop)
- faces :test 'equal)))
- (setq pos next)))
- ;; Faces used by overlays.
- (dolist (overlay (overlays-in (point-min) (point-max)))
- (let ((face-prop (overlay-get overlay 'face)))
- ;; FACE-PROP can be a face/attrlist or a list thereof.
- (setq faces (if (htmlize-face-list-p face-prop)
- (nunion (mapcar #'htmlize-unstringify-face face-prop)
- faces :test 'equal)
- (adjoin (htmlize-unstringify-face face-prop)
- faces :test 'equal))))))
- faces))
-
-;; htmlize-faces-at-point returns the faces in use at point. The
-;; faces are sorted by increasing priority, i.e. the last face takes
-;; precedence.
-;;
-;; Under XEmacs, this returns all the faces in all the extents at
-;; point. Under GNU Emacs, this returns all the faces in the `face'
-;; property and all the faces in the overlays at point.
-
-(cond (htmlize-running-xemacs
- (defun htmlize-faces-at-point ()
- (let (extent extent-list face-list face-prop)
- (while (setq extent (extent-at (point) nil 'face extent))
- (push extent extent-list))
- ;; extent-list is in reverse display order, meaning that
- ;; smallest ones come last. That is the order we want,
- ;; except it can be overridden by the `priority' property.
- (setq extent-list (stable-sort extent-list #'<
- :key #'extent-priority))
- (dolist (extent extent-list)
- (setq face-prop (extent-face extent))
- ;; extent's face-list is in reverse order from what we
- ;; want, but the `nreverse' below will take care of it.
- (setq face-list (if (listp face-prop)
- (append face-prop face-list)
- (cons face-prop face-list))))
- (nreverse face-list))))
- (t
- (defun htmlize-faces-at-point ()
- (let (all-faces)
- ;; Faces from text properties.
- (let ((face-prop (get-text-property (point) 'face)))
- (setq all-faces (if (htmlize-face-list-p face-prop)
- (nreverse (mapcar #'htmlize-unstringify-face
- face-prop))
- (list (htmlize-unstringify-face face-prop)))))
- ;; Faces from overlays.
- (let ((overlays
- ;; Collect overlays at point that specify `face'.
- (delete-if-not (lambda (o)
- (overlay-get o 'face))
- (overlays-at (point))))
- list face-prop)
- ;; Sort the overlays so the smaller (more specific) ones
- ;; come later. The number of overlays at each one
- ;; position should be very small, so the sort shouldn't
- ;; slow things down.
- (setq overlays (sort* overlays
- ;; Sort by ascending...
- #'<
- ;; ...overlay size.
- :key (lambda (o)
- (- (overlay-end o)
- (overlay-start o)))))
- ;; Overlay priorities, if present, override the above
- ;; established order. Larger overlay priority takes
- ;; precedence and therefore comes later in the list.
- (setq overlays (stable-sort
- overlays
- ;; Reorder (stably) by acending...
- #'<
- ;; ...overlay priority.
- :key (lambda (o)
- (or (overlay-get o 'priority) 0))))
- (dolist (overlay overlays)
- (setq face-prop (overlay-get overlay 'face))
- (setq list (if (htmlize-face-list-p face-prop)
- (nconc (nreverse (mapcar
- #'htmlize-unstringify-face
- face-prop))
- list)
- (cons (htmlize-unstringify-face face-prop) list))))
- ;; Under "Merging Faces" the manual explicitly states
- ;; that faces specified by overlays take precedence over
- ;; faces specified by text properties.
- (setq all-faces (nconc all-faces list)))
- all-faces))))
-
-;; htmlize supports generating HTML in two several fundamentally
-;; different ways, one with the use of CSS and nested <span> tags, and
-;; the other with the use of the old <font> tags. Rather than adding
-;; a bunch of ifs to many places, we take a semi-OO approach.
-;; `htmlize-buffer-1' calls a number of "methods", which indirect to
-;; the functions that depend on `htmlize-output-type'. The currently
-;; used methods are `doctype', `insert-head', `body-tag', and
-;; `insert-text'. Not all output types define all methods.
-;;
-;; Methods are called either with (htmlize-method METHOD ARGS...)
-;; special form, or by accessing the function with
-;; (htmlize-method-function 'METHOD) and calling (funcall FUNCTION).
-;; The latter form is useful in tight loops because `htmlize-method'
-;; conses.
-;;
-;; Currently defined output types are `css' and `font'.
-
-(defmacro htmlize-method (method &rest args)
- ;; Expand to (htmlize-TYPE-METHOD ...ARGS...). TYPE is the value of
- ;; `htmlize-output-type' at run time.
- `(funcall (htmlize-method-function ',method) ,@args))
-
-(defun htmlize-method-function (method)
- ;; Return METHOD's function definition for the current output type.
- ;; The returned object can be safely funcalled.
- (let ((sym (intern (format "htmlize-%s-%s" htmlize-output-type method))))
- (indirect-function (if (fboundp sym)
- sym
- (let ((default (intern (concat "htmlize-default-"
- (symbol-name method)))))
- (if (fboundp default)
- default
- 'ignore))))))
-
-(defvar htmlize-memoization-table (make-hash-table :test 'equal))
-
-(defmacro htmlize-memoize (key generator)
- "Return the value of GENERATOR, memoized as KEY.
-That means that GENERATOR will be evaluated and returned the first time
-it's called with the same value of KEY. All other times, the cached
-\(memoized) value will be returned."
- (let ((value (gensym)))
- `(let ((,value (gethash ,key htmlize-memoization-table)))
- (unless ,value
- (setq ,value ,generator)
- (setf (gethash ,key htmlize-memoization-table) ,value))
- ,value)))
-
-;;; Default methods.
-
-(defun htmlize-default-doctype ()
- nil ; no doc-string
- ;; According to DTDs published by the W3C, it is illegal to embed
- ;; <font> in <pre>. This makes sense in general, but is bad for
- ;; htmlize's intended usage of <font> to specify the document color.
-
- ;; To make generated HTML legal, htmlize's `font' mode used to
- ;; specify the SGML declaration of "HTML Pro" DTD here. HTML Pro
- ;; aka Silmaril DTD was a project whose goal was to produce a GPL'ed
- ;; DTD that would encompass all the incompatible HTML extensions
- ;; procured by Netscape, MSIE, and other players in the field.
- ;; Apparently the project got abandoned, the last available version
- ;; being "Draft 0 Revision 11" from January 1997, as documented at
- ;; <http://imbolc.ucc.ie/~pflynn/articles/htmlpro.html>.
-
- ;; Since by now HTML Pro is remembered by none but the most die-hard
- ;; early-web-days nostalgics and used by not even them, there is no
- ;; use in specifying it. So we return the standard HTML 4.0
- ;; declaration, which makes generated HTML technically illegal. If
- ;; you have a problem with that, use the `css' engine designed to
- ;; create fully conforming HTML.
-
- "<!DOCTYPE html PUBLIC \"-//W3C//DTD HTML 4.01//EN\">"
-
- ;; Now-abandoned HTML Pro declaration.
- ;"<!DOCTYPE HTML PUBLIC \"+//Silmaril//DTD HTML Pro v0r11 19970101//EN\">"
- )
-
-(defun htmlize-default-body-tag (face-map)
- nil ; no doc-string
- "<body>")
-
-;;; CSS based output support.
-
-;; Internal function; not a method.
-(defun htmlize-css-specs (fstruct)
- (let (result)
- (when (htmlize-fstruct-foreground fstruct)
- (push (format "color: %s;" (htmlize-fstruct-foreground fstruct))
- result))
- (when (htmlize-fstruct-background fstruct)
- (push (format "background-color: %s;"
- (htmlize-fstruct-background fstruct))
- result))
- (let ((size (htmlize-fstruct-size fstruct)))
- (when (and size (not (eq htmlize-ignore-face-size t)))
- (cond ((floatp size)
- (push (format "font-size: %d%%;" (* 100 size)) result))
- ((not (eq htmlize-ignore-face-size 'absolute))
- (push (format "font-size: %spt;" (/ size 10.0)) result)))))
- (when (htmlize-fstruct-boldp fstruct)
- (push "font-weight: bold;" result))
- (when (htmlize-fstruct-italicp fstruct)
- (push "font-style: italic;" result))
- (when (htmlize-fstruct-underlinep fstruct)
- (push "text-decoration: underline;" result))
- (when (htmlize-fstruct-overlinep fstruct)
- (push "text-decoration: overline;" result))
- (when (htmlize-fstruct-strikep fstruct)
- (push "text-decoration: line-through;" result))
- (nreverse result)))
-
-(defun htmlize-css-insert-head (buffer-faces face-map)
- (insert " <style type=\"text/css\">\n <!--\n")
- (insert " body {\n "
- (mapconcat #'identity
- (htmlize-css-specs (gethash 'default face-map))
- "\n ")
- "\n }\n")
- (dolist (face (sort* (copy-list buffer-faces) #'string-lessp
- :key (lambda (f)
- (htmlize-fstruct-css-name (gethash f face-map)))))
- (let* ((fstruct (gethash face face-map))
- (cleaned-up-face-name
- (let ((s
- ;; Use `prin1-to-string' rather than `symbol-name'
- ;; to get the face name because the "face" can also
- ;; be an attrlist, which is not a symbol.
- (prin1-to-string face)))
- ;; If the name contains `--' or `*/', remove them.
- (while (string-match "--" s)
- (setq s (replace-match "-" t t s)))
- (while (string-match "\\*/" s)
- (setq s (replace-match "XX" t t s)))
- s))
- (specs (htmlize-css-specs fstruct)))
- (insert " ." (htmlize-fstruct-css-name fstruct))
- (if (null specs)
- (insert " {")
- (insert " {\n /* " cleaned-up-face-name " */\n "
- (mapconcat #'identity specs "\n ")))
- (insert "\n }\n")))
- (insert htmlize-hyperlink-style
- " -->\n </style>\n"))
-
-(defun htmlize-css-insert-text (text fstruct-list buffer)
- ;; Insert TEXT colored with FACES into BUFFER. In CSS mode, this is
- ;; easy: just nest the text in one <span class=...> tag for each
- ;; face in FSTRUCT-LIST.
- (dolist (fstruct fstruct-list)
- (princ "<span class=\"" buffer)
- (princ (htmlize-fstruct-css-name fstruct) buffer)
- (princ "\">" buffer))
- (princ text buffer)
- (dolist (fstruct fstruct-list)
- (ignore fstruct) ; shut up the byte-compiler
- (princ "</span>" buffer)))
-
-;; `inline-css' output support.
-
-(defun htmlize-inline-css-body-tag (face-map)
- (format "<body style=\"%s\">"
- (mapconcat #'identity (htmlize-css-specs (gethash 'default face-map))
- " ")))
-
-(defun htmlize-inline-css-insert-text (text fstruct-list buffer)
- (let* ((merged (htmlize-merge-faces fstruct-list))
- (style (htmlize-memoize
- merged
- (let ((specs (htmlize-css-specs merged)))
- (and specs
- (mapconcat #'identity (htmlize-css-specs merged) " "))))))
- (when style
- (princ "<span style=\"" buffer)
- (princ style buffer)
- (princ "\">" buffer))
- (princ text buffer)
- (when style
- (princ "</span>" buffer))))
-
-;;; `font' tag based output support.
-
-(defun htmlize-font-body-tag (face-map)
- (let ((fstruct (gethash 'default face-map)))
- (format "<body text=\"%s\" bgcolor=\"%s\">"
- (htmlize-fstruct-foreground fstruct)
- (htmlize-fstruct-background fstruct))))
-
-(defun htmlize-font-insert-text (text fstruct-list buffer)
- ;; In `font' mode, we use the traditional HTML means of altering
- ;; presentation: <font> tag for colors, <b> for bold, <u> for
- ;; underline, and <strike> for strike-through.
- (let* ((merged (htmlize-merge-faces fstruct-list))
- (markup (htmlize-memoize
- merged
- (cons (concat
- (and (htmlize-fstruct-foreground merged)
- (format "<font color=\"%s\">" (htmlize-fstruct-foreground merged)))
- (and (htmlize-fstruct-boldp merged) "<b>")
- (and (htmlize-fstruct-italicp merged) "<i>")
- (and (htmlize-fstruct-underlinep merged) "<u>")
- (and (htmlize-fstruct-strikep merged) "<strike>"))
- (concat
- (and (htmlize-fstruct-strikep merged) "</strike>")
- (and (htmlize-fstruct-underlinep merged) "</u>")
- (and (htmlize-fstruct-italicp merged) "</i>")
- (and (htmlize-fstruct-boldp merged) "</b>")
- (and (htmlize-fstruct-foreground merged) "</font>"))))))
- (princ (car markup) buffer)
- (princ text buffer)
- (princ (cdr markup) buffer)))
-
-(defun htmlize-buffer-1 ()
- ;; Internal function; don't call it from outside this file. Htmlize
- ;; current buffer, writing the resulting HTML to a new buffer, and
- ;; return it. Unlike htmlize-buffer, this doesn't change current
- ;; buffer or use switch-to-buffer.
- (save-excursion
- ;; Protect against the hook changing the current buffer.
- (save-excursion
- (run-hooks 'htmlize-before-hook))
- ;; Convince font-lock support modes to fontify the entire buffer
- ;; in advance.
- (htmlize-ensure-fontified)
- (clrhash htmlize-extended-character-cache)
- (clrhash htmlize-memoization-table)
- (let* ((buffer-faces (htmlize-faces-in-buffer))
- (face-map (htmlize-make-face-map (adjoin 'default buffer-faces)))
- ;; Generate the new buffer. It's important that it inherits
- ;; default-directory from the current buffer.
- (htmlbuf (generate-new-buffer (if (buffer-file-name)
- (htmlize-make-file-name
- (file-name-nondirectory
- (buffer-file-name)))
- "*html*")))
- ;; Having a dummy value in the plist allows writing simply
- ;; (plist-put places foo bar).
- (places '(nil nil))
- (title (if (buffer-file-name)
- (file-name-nondirectory (buffer-file-name))
- (buffer-name))))
- ;; Initialize HTMLBUF and insert the HTML prolog.
- (with-current-buffer htmlbuf
- (buffer-disable-undo)
- (insert (htmlize-method doctype) ?\n
- (format "<!-- Created by htmlize-%s in %s mode. -->\n"
- htmlize-version htmlize-output-type)
- "<html>\n ")
- (plist-put places 'head-start (point-marker))
- (insert "<head>\n"
- " <title>" (htmlize-protect-string title) "</title>\n"
- (if htmlize-html-charset
- (format (concat " <meta http-equiv=\"Content-Type\" "
- "content=\"text/html; charset=%s\">\n")
- htmlize-html-charset)
- "")
- htmlize-head-tags)
- (htmlize-method insert-head buffer-faces face-map)
- (insert " </head>")
- (plist-put places 'head-end (point-marker))
- (insert "\n ")
- (plist-put places 'body-start (point-marker))
- (insert (htmlize-method body-tag face-map)
- "\n ")
- (plist-put places 'content-start (point-marker))
- (insert "<pre>\n"))
- (let ((insert-text-method
- ;; Get the inserter method, so we can funcall it inside
- ;; the loop. Not calling `htmlize-method' in the loop
- ;; body yields a measurable speed increase.
- (htmlize-method-function 'insert-text))
- ;; Declare variables used in loop body outside the loop
- ;; because it's faster to establish `let' bindings only
- ;; once.
- next-change text face-list fstruct-list trailing-ellipsis)
- ;; This loop traverses and reads the source buffer, appending
- ;; the resulting HTML to HTMLBUF with `princ'. This method is
- ;; fast because: 1) it doesn't require examining the text
- ;; properties char by char (htmlize-next-change is used to
- ;; move between runs with the same face), and 2) it doesn't
- ;; require buffer switches, which are slow in Emacs.
- (goto-char (point-min))
- (while (not (eobp))
- (setq next-change (htmlize-next-change (point) 'face))
- ;; Get faces in use between (point) and NEXT-CHANGE, and
- ;; convert them to fstructs.
- (setq face-list (htmlize-faces-at-point)
- fstruct-list (delq nil (mapcar (lambda (f)
- (gethash f face-map))
- face-list)))
- ;; Extract buffer text, sans the invisible parts. Then
- ;; untabify it and escape the HTML metacharacters.
- (setq text (htmlize-buffer-substring-no-invisible
- (point) next-change))
- (when trailing-ellipsis
- (setq text (htmlize-trim-ellipsis text)))
- ;; If TEXT ends up empty, don't change trailing-ellipsis.
- (when (> (length text) 0)
- (setq trailing-ellipsis
- (get-text-property (1- (length text))
- 'htmlize-ellipsis text)))
- (setq text (htmlize-untabify text (current-column)))
- (setq text (htmlize-protect-string text))
- ;; Don't bother writing anything if there's no text (this
- ;; happens in invisible regions).
- (when (> (length text) 0)
- ;; Insert the text, along with the necessary markup to
- ;; represent faces in FSTRUCT-LIST.
- (funcall insert-text-method text fstruct-list htmlbuf))
- (goto-char next-change)))
-
- ;; Insert the epilog and post-process the buffer.
- (with-current-buffer htmlbuf
- (insert "</pre>")
- (plist-put places 'content-end (point-marker))
- (insert "\n </body>")
- (plist-put places 'body-end (point-marker))
- (insert "\n</html>\n")
- (when htmlize-generate-hyperlinks
- (htmlize-make-hyperlinks))
- (htmlize-defang-local-variables)
- (when htmlize-replace-form-feeds
- ;; Change each "\n^L" to "<hr />".
- (goto-char (point-min))
- (let ((source
- ;; ^L has already been escaped, so search for that.
- (htmlize-protect-string "\n\^L"))
- (replacement
- (if (stringp htmlize-replace-form-feeds)
- htmlize-replace-form-feeds
- "</pre><hr /><pre>")))
- (while (search-forward source nil t)
- (replace-match replacement t t))))
- (goto-char (point-min))
- (when htmlize-html-major-mode
- ;; What sucks about this is that the minor modes, most notably
- ;; font-lock-mode, won't be initialized. Oh well.
- (funcall htmlize-html-major-mode))
- (set (make-local-variable 'htmlize-buffer-places) places)
- (run-hooks 'htmlize-after-hook)
- (buffer-enable-undo))
- htmlbuf)))
-
-;; Utility functions.
-
-(defmacro htmlize-with-fontify-message (&rest body)
- ;; When forcing fontification of large buffers in
- ;; htmlize-ensure-fontified, inform the user that he is waiting for
- ;; font-lock, not for htmlize to finish.
- `(progn
- (if (> (buffer-size) 65536)
- (message "Forcing fontification of %s..."
- (buffer-name (current-buffer))))
- ,@body
- (if (> (buffer-size) 65536)
- (message "Forcing fontification of %s...done"
- (buffer-name (current-buffer))))))
-
-(defun htmlize-ensure-fontified ()
- ;; If font-lock is being used, ensure that the "support" modes
- ;; actually fontify the buffer. If font-lock is not in use, we
- ;; don't care because, except in htmlize-file, we don't force
- ;; font-lock on the user.
- (when (and (boundp 'font-lock-mode)
- font-lock-mode)
- ;; In part taken from ps-print-ensure-fontified in GNU Emacs 21.
- (cond
- ((and (boundp 'jit-lock-mode)
- (symbol-value 'jit-lock-mode))
- (htmlize-with-fontify-message
- (jit-lock-fontify-now (point-min) (point-max))))
- ((and (boundp 'lazy-lock-mode)
- (symbol-value 'lazy-lock-mode))
- (htmlize-with-fontify-message
- (lazy-lock-fontify-region (point-min) (point-max))))
- ((and (boundp 'lazy-shot-mode)
- (symbol-value 'lazy-shot-mode))
- (htmlize-with-fontify-message
- ;; lazy-shot is amazing in that it must *refontify* the region,
- ;; even if the whole buffer has already been fontified. <sigh>
- (lazy-shot-fontify-region (point-min) (point-max))))
- ;; There's also fast-lock, but we don't need to handle specially,
- ;; I think. fast-lock doesn't really defer fontification, it
- ;; just saves it to an external cache so it's not done twice.
- )))
-
-
-;;;###autoload
-(defun htmlize-buffer (&optional buffer)
- "Convert BUFFER to HTML, preserving colors and decorations.
-
-The generated HTML is available in a new buffer, which is returned.
-When invoked interactively, the new buffer is selected in the current
-window. The title of the generated document will be set to the buffer's
-file name or, if that's not available, to the buffer's name.
-
-Note that htmlize doesn't fontify your buffers, it only uses the
-decorations that are already present. If you don't set up font-lock or
-something else to fontify your buffers, the resulting HTML will be
-plain. Likewise, if you don't like the choice of colors, fix the mode
-that created them, or simply alter the faces it uses."
- (interactive)
- (let ((htmlbuf (with-current-buffer (or buffer (current-buffer))
- (htmlize-buffer-1))))
- (when (interactive-p)
- (switch-to-buffer htmlbuf))
- htmlbuf))
-
-;;;###autoload
-(defun htmlize-region (beg end)
- "Convert the region to HTML, preserving colors and decorations.
-See `htmlize-buffer' for details."
- (interactive "r")
- ;; Don't let zmacs region highlighting end up in HTML.
- (when (fboundp 'zmacs-deactivate-region)
- (zmacs-deactivate-region))
- (let ((htmlbuf (save-restriction
- (narrow-to-region beg end)
- (htmlize-buffer-1))))
- (when (interactive-p)
- (switch-to-buffer htmlbuf))
- htmlbuf))
-
-(defun htmlize-region-for-paste (beg end)
- "Htmlize the region and return just the HTML as a string.
-This forces the `inline-css' style and only returns the HTML body,
-but without the BODY tag. This should make it useful for inserting
-the text to another HTML buffer."
- (let* ((htmlize-output-type 'inline-css)
- (htmlbuf (htmlize-region beg end)))
- (unwind-protect
- (with-current-buffer htmlbuf
- (buffer-substring (plist-get htmlize-buffer-places 'content-start)
- (plist-get htmlize-buffer-places 'content-end)))
- (kill-buffer htmlbuf))))
-
-(defun htmlize-make-file-name (file)
- "Make an HTML file name from FILE.
-
-In its default implementation, this simply appends `.html' to FILE.
-This function is called by htmlize to create the buffer file name, and
-by `htmlize-file' to create the target file name.
-
-More elaborate transformations are conceivable, such as changing FILE's
-extension to `.html' (\"file.c\" -> \"file.html\"). If you want them,
-overload this function to do it and htmlize will comply."
- (concat file ".html"))
-
-;; Older implementation of htmlize-make-file-name that changes FILE's
-;; extension to ".html".
-;(defun htmlize-make-file-name (file)
-; (let ((extension (file-name-extension file))
-; (sans-extension (file-name-sans-extension file)))
-; (if (or (equal extension "html")
-; (equal extension "htm")
-; (equal sans-extension ""))
-; (concat file ".html")
-; (concat sans-extension ".html"))))
-
-;;;###autoload
-(defun htmlize-file (file &optional target)
- "Load FILE, fontify it, convert it to HTML, and save the result.
-
-Contents of FILE are inserted into a temporary buffer, whose major mode
-is set with `normal-mode' as appropriate for the file type. The buffer
-is subsequently fontified with `font-lock' and converted to HTML. Note
-that, unlike `htmlize-buffer', this function explicitly turns on
-font-lock. If a form of highlighting other than font-lock is desired,
-please use `htmlize-buffer' directly on buffers so highlighted.
-
-Buffers currently visiting FILE are unaffected by this function. The
-function does not change current buffer or move the point.
-
-If TARGET is specified and names a directory, the resulting file will be
-saved there instead of to FILE's directory. If TARGET is specified and
-does not name a directory, it will be used as output file name."
- (interactive (list (read-file-name
- "HTML-ize file: "
- nil nil nil (and (buffer-file-name)
- (file-name-nondirectory
- (buffer-file-name))))))
- (let ((output-file (if (and target (not (file-directory-p target)))
- target
- (expand-file-name
- (htmlize-make-file-name (file-name-nondirectory file))
- (or target (file-name-directory file)))))
- ;; Try to prevent `find-file-noselect' from triggering
- ;; font-lock because we'll fontify explicitly below.
- (font-lock-mode nil)
- (font-lock-auto-fontify nil)
- (global-font-lock-mode nil)
- ;; Ignore the size limit for the purposes of htmlization.
- (font-lock-maximum-size nil)
- ;; Disable font-lock support modes. This will only work in
- ;; more recent Emacs versions, so htmlize-buffer-1 still needs
- ;; to call htmlize-ensure-fontified.
- (font-lock-support-mode nil))
- (with-temp-buffer
- ;; Insert FILE into the temporary buffer.
- (insert-file-contents file)
- ;; Set the file name so normal-mode and htmlize-buffer-1 pick it
- ;; up. Restore it afterwards so with-temp-buffer's kill-buffer
- ;; doesn't complain about killing a modified buffer.
- (let ((buffer-file-name file))
- ;; Set the major mode for the sake of font-lock.
- (normal-mode)
- (font-lock-mode 1)
- (unless font-lock-mode
- ;; In GNU Emacs (font-lock-mode 1) doesn't force font-lock,
- ;; contrary to the documentation. This seems to work.
- (font-lock-fontify-buffer))
- ;; htmlize the buffer and save the HTML.
- (with-current-buffer (htmlize-buffer-1)
- (unwind-protect
- (progn
- (run-hooks 'htmlize-file-hook)
- (write-region (point-min) (point-max) output-file))
- (kill-buffer (current-buffer)))))))
- ;; I haven't decided on a useful return value yet, so just return
- ;; nil.
- nil)
-
-;;;###autoload
-(defun htmlize-many-files (files &optional target-directory)
- "Convert FILES to HTML and save the corresponding HTML versions.
-
-FILES should be a list of file names to convert. This function calls
-`htmlize-file' on each file; see that function for details. When
-invoked interactively, you are prompted for a list of files to convert,
-terminated with RET.
-
-If TARGET-DIRECTORY is specified, the HTML files will be saved to that
-directory. Normally, each HTML file is saved to the directory of the
-corresponding source file."
- (interactive
- (list
- (let (list file)
- ;; Use empty string as DEFAULT because setting DEFAULT to nil
- ;; defaults to the directory name, which is not what we want.
- (while (not (equal (setq file (read-file-name
- "HTML-ize file (RET to finish): "
- (and list (file-name-directory
- (car list)))
- "" t))
- ""))
- (push file list))
- (nreverse list))))
- ;; Verify that TARGET-DIRECTORY is indeed a directory. If it's a
- ;; file, htmlize-file will use it as target, and that doesn't make
- ;; sense.
- (and target-directory
- (not (file-directory-p target-directory))
- (error "target-directory must name a directory: %s" target-directory))
- (dolist (file files)
- (htmlize-file file target-directory)))
-
-;;;###autoload
-(defun htmlize-many-files-dired (arg &optional target-directory)
- "HTMLize dired-marked files."
- (interactive "P")
- (htmlize-many-files (dired-get-marked-files nil arg) target-directory))
-
-(provide 'htmlize)
-
-;;; htmlize.el ends here