1672 lines
65 KiB
EmacsLisp
1672 lines
65 KiB
EmacsLisp
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;; htmlize.el -- Convert buffer text and decorations to HTML.
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;; Copyright (C) 1997-2003,2005,2006,2009,2011 Hrvoje Niksic
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;; Author: Hrvoje Niksic <hniksic@xemacs.org>
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;; Keywords: hypermedia, extensions
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;; Version: 1.39
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;; This program 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 2, or (at your option)
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;; any later version.
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;; This program 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 this program; see the file COPYING. If not, write to the
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;; Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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;; Boston, MA 02111-1307, USA.
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;;; Commentary:
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;; This package converts the buffer text and the associated
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;; decorations to HTML. Mail to <hniksic@xemacs.org> to discuss
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;; features and additions. All suggestions are more than welcome.
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;; To use it, just switch to the buffer you want HTML-ized and type
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;; `M-x htmlize-buffer'. You will be switched to a new buffer that
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;; contains the resulting HTML code. You can edit and inspect this
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;; buffer, or you can just save it with C-x C-w. `M-x htmlize-file'
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;; will find a file, fontify it, and save the HTML version in
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;; FILE.html, without any additional intervention. `M-x
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;; htmlize-many-files' allows you to htmlize any number of files in
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;; the same manner. `M-x htmlize-many-files-dired' does the same for
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;; files marked in a dired buffer.
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;; htmlize supports three types of HTML output, selected by setting
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;; `htmlize-output-type': `css', `inline-css', and `font'. In `css'
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;; mode, htmlize uses cascading style sheets to specify colors; it
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;; generates classes that correspond to Emacs faces and uses <span
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;; class=FACE>...</span> to color parts of text. In this mode, the
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;; produced HTML is valid under the 4.01 strict DTD, as confirmed by
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;; the W3C validator. `inline-css' is like `css', except the CSS is
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;; put directly in the STYLE attribute of the SPAN element, making it
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;; possible to paste the generated HTML to other documents. In `font'
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;; mode, htmlize uses <font color="...">...</font> to colorize HTML,
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;; which is not standard-compliant, but works better in older
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;; browsers. `css' mode is the default.
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;; You can also use htmlize from your Emacs Lisp code. When called
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;; non-interactively, `htmlize-buffer' and `htmlize-region' will
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;; return the resulting HTML buffer, but will not change current
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;; buffer or move the point.
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;; htmlize aims for compatibility with Emacsen 21 and later. Please
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;; let me know if it doesn't work on the version of XEmacs or GNU
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;; Emacs that you are using. The package relies on the presence of CL
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;; extensions, especially for cross-emacs compatibility; please don't
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;; try to remove that dependency. Yes, I know I require `cl' at
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;; runtime, and I prefer it that way. When byte-compiling under GNU
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;; Emacs, you're likely to get a few warnings; just ignore them.
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;; The latest version is available as a git repository at:
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;;
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;; <http://fly.srk.fer.hr/~hniksic/emacs/htmlize.git>
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;;
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;; The snapshot of the latest release can be obtained at:
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;;
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;; <http://fly.srk.fer.hr/~hniksic/emacs/htmlize.el.cgi>
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;;
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;; You can find a sample of htmlize's output (possibly generated with
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;; an older version) at:
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;;
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;; <http://fly.srk.fer.hr/~hniksic/emacs/htmlize.el.html>
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;; Thanks go to the many people who have sent reports and contributed
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;; comments, suggestions, and fixes. They include Ron Gut, Bob
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;; Weiner, Toni Drabik, Peter Breton, Thomas Vogels, Juri Linkov,
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;; Maciek Pasternacki, and many others.
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;; User quotes: "You sir, are a sick, sick, _sick_ person. :)"
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;; -- Bill Perry, author of Emacs/W3
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;;; Code:
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(require 'cl)
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(eval-when-compile
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(if (string-match "XEmacs" emacs-version)
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(byte-compiler-options
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(warnings (- unresolved))))
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(defvar font-lock-auto-fontify)
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(defvar font-lock-support-mode)
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(defvar global-font-lock-mode))
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(defconst htmlize-version "1.39")
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(defgroup htmlize nil
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"Convert buffer text and faces to HTML."
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:group 'hypermedia)
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(defcustom htmlize-head-tags ""
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"*Additional tags to insert within HEAD of the generated document."
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:type 'string
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:group 'htmlize)
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(defcustom htmlize-output-type 'css
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"*Output type of generated HTML, one of `css', `inline-css', or `font'.
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When set to `css' (the default), htmlize will generate a style sheet
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with description of faces, and use it in the HTML document, specifying
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the faces in the actual text with <span class=\"FACE\">.
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When set to `inline-css', the style will be generated as above, but
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placed directly in the STYLE attribute of the span ELEMENT: <span
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style=\"STYLE\">. This makes it easier to paste the resulting HTML to
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other documents.
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When set to `font', the properties will be set using layout tags
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<font>, <b>, <i>, <u>, and <strike>.
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`css' output is normally preferred, but `font' is still useful for
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supporting old, pre-CSS browsers, and both `inline-css' and `font' for
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easier embedding of colorized text in foreign HTML documents (no style
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sheet to carry around)."
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:type '(choice (const css) (const inline-css) (const font))
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:group 'htmlize)
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(defcustom htmlize-generate-hyperlinks t
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"*Non-nil means generate the hyperlinks for URLs and mail addresses.
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This is on by default; set it to nil if you don't want htmlize to
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insert hyperlinks in the resulting HTML. (In which case you can still
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do your own hyperlinkification from htmlize-after-hook.)"
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:type 'boolean
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:group 'htmlize)
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(defcustom htmlize-hyperlink-style "
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a {
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color: inherit;
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background-color: inherit;
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font: inherit;
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text-decoration: inherit;
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}
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a:hover {
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text-decoration: underline;
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}
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"
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"*The CSS style used for hyperlinks when in CSS mode."
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:type 'string
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:group 'htmlize)
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(defcustom htmlize-replace-form-feeds t
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"*Non-nil means replace form feeds in source code with HTML separators.
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Form feeds are the ^L characters at line beginnings that are sometimes
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used to separate sections of source code. If this variable is set to
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`t', form feed characters are replaced with the <hr> separator. If this
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is a string, it specifies the replacement to use. Note that <pre> is
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temporarily closed before the separator is inserted, so the default
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replacement is effectively \"</pre><hr /><pre>\". If you specify
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another replacement, don't forget to close and reopen the <pre> if you
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want the output to remain valid HTML.
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If you need more elaborate processing, set this to nil and use
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htmlize-after-hook."
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:type 'boolean
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:group 'htmlize)
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(defcustom htmlize-html-charset nil
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"*The charset declared by the resulting HTML documents.
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When non-nil, causes htmlize to insert the following in the HEAD section
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of the generated HTML:
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<meta http-equiv=\"Content-Type\" content=\"text/html; charset=CHARSET\">
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where CHARSET is the value you've set for htmlize-html-charset. Valid
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charsets are defined by MIME and include strings like \"iso-8859-1\",
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\"iso-8859-15\", \"utf-8\", etc.
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If you are using non-Latin-1 charsets, you might need to set this for
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your documents to render correctly. Also, the W3C validator requires
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submitted HTML documents to declare a charset. So if you care about
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validation, you can use this to prevent the validator from bitching.
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Needless to say, if you set this, you should actually make sure that
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the buffer is in the encoding you're claiming it is in. (Under Mule
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that is done by ensuring the correct \"file coding system\" for the
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buffer.) If you don't understand what that means, this option is
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probably not for you."
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:type '(choice (const :tag "Unset" nil)
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string)
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:group 'htmlize)
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(defcustom htmlize-convert-nonascii-to-entities (featurep 'mule)
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"*Whether non-ASCII characters should be converted to HTML entities.
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When this is non-nil, characters with codes in the 128-255 range will be
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considered Latin 1 and rewritten as \"&#CODE;\". Characters with codes
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above 255 will be converted to \"&#UCS;\", where UCS denotes the Unicode
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code point of the character. If the code point cannot be determined,
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the character will be copied unchanged, as would be the case if the
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option were nil.
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When the option is nil, the non-ASCII characters are copied to HTML
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without modification. In that case, the web server and/or the browser
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must be set to understand the encoding that was used when saving the
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buffer. (You might also want to specify it by setting
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`htmlize-html-charset'.)
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Note that in an HTML entity \"&#CODE;\", CODE is always a UCS code point,
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which has nothing to do with the charset the page is in. For example,
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\"©\" *always* refers to the copyright symbol, regardless of charset
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specified by the META tag or the charset sent by the HTTP server. In
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other words, \"©\" is exactly equivalent to \"©\".
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By default, entity conversion is turned on for Mule-enabled Emacsen and
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turned off otherwise. This is because Mule knows the charset of
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non-ASCII characters in the buffer. A non-Mule Emacs cannot tell
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whether a character with code 0xA9 represents Latin 1 copyright symbol,
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Latin 2 \"S with caron\", or something else altogether. Setting this to
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t without Mule means asserting that 128-255 characters always mean Latin
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1.
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For most people htmlize will work fine with this option left at the
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default setting; don't change it unless you know what you're doing."
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:type 'sexp
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:group 'htmlize)
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(defcustom htmlize-ignore-face-size 'absolute
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"*Whether face size should be ignored when generating HTML.
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If this is nil, face sizes are used. If set to t, sizes are ignored
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If set to `absolute', only absolute size specifications are ignored.
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Please note that font sizes only work with CSS-based output types."
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:type '(choice (const :tag "Don't ignore" nil)
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(const :tag "Ignore all" t)
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(const :tag "Ignore absolute" absolute))
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:group 'htmlize)
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(defcustom htmlize-css-name-prefix ""
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"*The prefix used for CSS names.
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The CSS names that htmlize generates from face names are often too
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generic for CSS files; for example, `font-lock-type-face' is transformed
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to `type'. Use this variable to add a prefix to the generated names.
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The string \"htmlize-\" is an example of a reasonable prefix."
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:type 'string
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:group 'htmlize)
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(defcustom htmlize-use-rgb-txt t
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"*Whether `rgb.txt' should be used to convert color names to RGB.
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This conversion means determining, for instance, that the color
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\"IndianRed\" corresponds to the (205, 92, 92) RGB triple. `rgb.txt'
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is the X color database that maps hundreds of color names to such RGB
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triples. When this variable is non-nil, `htmlize' uses `rgb.txt' to
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look up color names.
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If this variable is nil, htmlize queries Emacs for RGB components of
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colors using `color-instance-rgb-components' and `x-color-values'.
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This can yield incorrect results on non-true-color displays.
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If the `rgb.txt' file is not found (which will be the case if you're
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running Emacs on non-X11 systems), this option is ignored."
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:type 'boolean
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:group 'htmlize)
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(defcustom htmlize-html-major-mode nil
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"The mode the newly created HTML buffer will be put in.
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Set this to nil if you prefer the default (fundamental) mode."
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:type '(radio (const :tag "No mode (fundamental)" nil)
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(function-item html-mode)
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(function :tag "User-defined major mode"))
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:group 'htmlize)
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(defvar htmlize-before-hook nil
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"Hook run before htmlizing a buffer.
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The hook functions are run in the source buffer (not the resulting HTML
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buffer).")
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(defvar htmlize-after-hook nil
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"Hook run after htmlizing a buffer.
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Unlike `htmlize-before-hook', these functions are run in the generated
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HTML buffer. You may use them to modify the outlook of the final HTML
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output.")
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(defvar htmlize-file-hook nil
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"Hook run by `htmlize-file' after htmlizing a file, but before saving it.")
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(defvar htmlize-buffer-places)
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;;; Some cross-Emacs compatibility.
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;; I try to conditionalize on features rather than Emacs version, but
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;; in some cases checking against the version *is* necessary.
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(defconst htmlize-running-xemacs (string-match "XEmacs" emacs-version))
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;; We need a function that efficiently finds the next change of a
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;; property regardless of whether the change occurred because of a
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;; text property or an extent/overlay.
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(cond
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(htmlize-running-xemacs
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(defun htmlize-next-change (pos prop &optional limit)
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(if prop
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(next-single-property-change pos prop nil (or limit (point-max)))
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(next-property-change pos nil (or limit (point-max)))))
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(defun htmlize-next-face-change (pos &optional limit)
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(htmlize-next-change pos 'face limit)))
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((fboundp 'next-single-char-property-change)
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;; GNU Emacs 21+
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(defun htmlize-next-change (pos prop &optional limit)
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(if prop
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(next-single-char-property-change pos prop nil limit)
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(next-char-property-change pos limit)))
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(defun htmlize-overlay-faces-at (pos)
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(delq nil (mapcar (lambda (o) (overlay-get o 'face)) (overlays-at pos))))
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(defun htmlize-next-face-change (pos &optional limit)
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;; (htmlize-next-change pos 'face limit) would skip over entire
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|||
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;; overlays that specify the `face' property, even when they
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|||
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;; contain smaller text properties that also specify `face'.
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|||
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;; Emacs display engine merges those faces, and so must we.
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|||
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(or limit
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|||
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(setq limit (point-max)))
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|
|
(let ((next-prop (next-single-property-change pos 'face nil limit))
|
|||
|
|
(overlay-faces (htmlize-overlay-faces-at pos)))
|
|||
|
|
(while (progn
|
|||
|
|
(setq pos (next-overlay-change pos))
|
|||
|
|
(and (< pos next-prop)
|
|||
|
|
(equal overlay-faces (htmlize-overlay-faces-at pos)))))
|
|||
|
|
(min pos next-prop))))
|
|||
|
|
(t
|
|||
|
|
(error "htmlize requires next-single-property-change or \
|
|||
|
|
next-single-char-property-change")))
|
|||
|
|
|
|||
|
|
;;; 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 ?&) "&"
|
|||
|
|
(aref table ?<) "<"
|
|||
|
|
(aref table ?>) ">"
|
|||
|
|
;; 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 ?\") """
|
|||
|
|
)
|
|||
|
|
table))
|
|||
|
|
|
|||
|
|
;; A cache of HTML representation of non-ASCII characters. Depending
|
|||
|
|
;; on 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)))
|
|||
|
|
((encode-char char 'ucs)
|
|||
|
|
;; Must check if encode-char works for CHAR;
|
|||
|
|
;; it fails for Arabic and possibly elsewhere.
|
|||
|
|
(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-match-inv-spec (inv)
|
|||
|
|
(member* inv buffer-invisibility-spec
|
|||
|
|
:key (lambda (i)
|
|||
|
|
(if (symbolp i) i (car i)))))
|
|||
|
|
|
|||
|
|
(defun htmlize-decode-invisibility-spec (invisible)
|
|||
|
|
;; Return t, nil, or `ellipsis', depending on how invisible text should be inserted.
|
|||
|
|
|
|||
|
|
(if (not (listp buffer-invisibility-spec))
|
|||
|
|
;; If buffer-invisibility-spec is not a list, then all
|
|||
|
|
;; characters with non-nil `invisible' property are visible.
|
|||
|
|
(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)
|
|||
|
|
(htmlize-match-inv-spec invisible)
|
|||
|
|
(some #'htmlize-match-inv-spec invisible))))
|
|||
|
|
(cond ((null match) t)
|
|||
|
|
((cdr-safe (car match)) 'ellipsis)
|
|||
|
|
(t nil)))))
|
|||
|
|
|
|||
|
|
(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 last-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)
|
|||
|
|
show (htmlize-decode-invisibility-spec invisible))
|
|||
|
|
(cond ((eq show t)
|
|||
|
|
(push (buffer-substring-no-properties pos next-change) visible-list))
|
|||
|
|
((and (eq show 'ellipsis)
|
|||
|
|
(not (eq last-show 'ellipsis))
|
|||
|
|
;; Conflate successive ellipses.
|
|||
|
|
(push htmlize-ellipsis visible-list))))
|
|||
|
|
(setq pos next-change last-show show))
|
|||
|
|
(if (= (length visible-list) 1)
|
|||
|
|
;; If VISIBLE-LIST consists of only one element, return it and
|
|||
|
|
;; avoid creating a new string.
|
|||
|
|
(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-extract-text (beg end trailing-ellipsis)
|
|||
|
|
;; Extract buffer text, sans the invisible parts. Then
|
|||
|
|
;; untabify it and escape the HTML metacharacters.
|
|||
|
|
(let ((text (htmlize-buffer-substring-no-invisible beg end)))
|
|||
|
|
(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))
|
|||
|
|
(values text trailing-ellipsis)))
|
|||
|
|
|
|||
|
|
(defun htmlize-despam-address (string)
|
|||
|
|
"Replace every occurrence of '@' in STRING with @.
|
|||
|
|
`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 "@" 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
|
|||
|
|
"<\\(\\(mailto:\\)?\\([-=+_.a-zA-Z0-9]+@[-_.a-zA-Z0-9]+\\)\\)>"
|
|||
|
|
nil t)
|
|||
|
|
(let ((address (match-string 3))
|
|||
|
|
(link-text (match-string 1)))
|
|||
|
|
(delete-region (match-beginning 0) (match-end 0))
|
|||
|
|
(insert "<<a href=\"mailto:"
|
|||
|
|
(htmlize-despam-address address)
|
|||
|
|
"\">"
|
|||
|
|
(htmlize-despam-address link-text)
|
|||
|
|
"</a>>")))
|
|||
|
|
(goto-char (point-min))
|
|||
|
|
(while (re-search-forward "<\\(\\(URL:\\)?\\([a-zA-Z]+://[^;]+\\)\\)>"
|
|||
|
|
nil t)
|
|||
|
|
(let ((url (match-string 3))
|
|||
|
|
(link-text (match-string 1)))
|
|||
|
|
(delete-region (match-beginning 0) (match-end 0))
|
|||
|
|
(insert "<<a href=\"" url "\">" link-text "</a>>"))))
|
|||
|
|
|
|||
|
|
;; 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:" 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 (face-attribute f :inherit)
|
|||
|
|
until (or (not f) (eq f 'unspecified))
|
|||
|
|
for h = (face-attribute f :height)
|
|||
|
|
collect (if (eq h 'unspecified) nil h))))
|
|||
|
|
(reduce 'htmlize-merge-size (cons nil size-list))))
|
|||
|
|
|
|||
|
|
(defun htmlize-face-css-name (face)
|
|||
|
|
;; Generate the css-name property for the given face. Emacs places
|
|||
|
|
;; no restrictions on the names of symbols that represent faces --
|
|||
|
|
;; any characters may be in the name, even control chars. We try
|
|||
|
|
;; hard to beat the face name into shape, both esthetically and
|
|||
|
|
;; according to CSS1 specs.
|
|||
|
|
(let ((name (downcase (symbol-name face))))
|
|||
|
|
(when (string-match "\\`font-lock-" name)
|
|||
|
|
;; font-lock-FOO-face -> 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.
|
|||
|
|
(concat htmlize-css-name-prefix name)))
|
|||
|
|
|
|||
|
|
(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)))))
|
|||
|
|
(if 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.
|
|||
|
|
(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)))
|
|||
|
|
;; GNU Emacs
|
|||
|
|
(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))))
|
|||
|
|
(setf (htmlize-fstruct-css-name fstruct) (htmlize-face-css-name face))
|
|||
|
|
fstruct))
|
|||
|
|
|
|||
|
|
(defmacro htmlize-copy-attr-if-set (attr-list dest source)
|
|||
|
|
;; Generate code with the following pattern:
|
|||
|
|
;; (progn
|
|||
|
|
;; (when (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 `(when (,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 several flavors, some of which
|
|||
|
|
;; use CSS, and others the <font> element. We take an OO approach and
|
|||
|
|
;; define "methods" that 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.
|
|||
|
|
|
|||
|
|
(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
|
|||
|
|
;; Note that the `font' output is technically invalid under this DTD
|
|||
|
|
;; because the DTD doesn't allow embedding <font> in <pre>.
|
|||
|
|
"<!DOCTYPE html PUBLIC \"-//W3C//DTD HTML 4.01//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*")))
|
|||
|
|
(places (gensym))
|
|||
|
|
(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 ")
|
|||
|
|
(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>")
|
|||
|
|
(put places 'head-end (point-marker))
|
|||
|
|
(insert "\n ")
|
|||
|
|
(put places 'body-start (point-marker))
|
|||
|
|
(insert (htmlize-method body-tag face-map)
|
|||
|
|
"\n ")
|
|||
|
|
(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-face-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-face-change (point)))
|
|||
|
|
;; 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)))
|
|||
|
|
(multiple-value-setq (text trailing-ellipsis)
|
|||
|
|
(htmlize-extract-text (point) next-change trailing-ellipsis))
|
|||
|
|
;; 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>")
|
|||
|
|
(put places 'content-end (point-marker))
|
|||
|
|
(insert "\n </body>")
|
|||
|
|
(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)
|
|||
|
|
(symbol-plist 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
|