--- /dev/null
+;; x-font-menu.el --- Managing menus of X fonts.
+
+;; Copyright (C) 1994 Free Software Foundation, Inc.
+;; Copyright (C) 1995 Tinker Systems and INS Engineering Corp.
+;; Copyright (C) 1997 Sun Microsystems
+
+;; Author: Jamie Zawinski <jwz@netscape.com>
+;; Restructured by: Jonathan Stigelman <Stig@hackvan.com>
+;; Mule-ized by: Martin Buchholz
+
+;; This file is part of XEmacs.
+
+;; XEmacs 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.
+
+;; XEmacs 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 XEmacs; see the file COPYING. If not, write to the
+;; Free Software Foundation, 59 Temple Place - Suite 330,
+;; Boston, MA 02111-1307, USA.
+
+;;; Commentary:
+;;;
+;;; Creates three menus, "Font", "Size", and "Weight", and puts them on the
+;;; "Options" menu. The contents of these menus are the superset of those
+;;; properties available on any fonts, but only the intersection of the three
+;;; sets is selectable at one time.
+;;;
+;;; Known Problems:
+;;; ===============
+;;; Items on the Font menu are selectable if and only if that font exists in
+;;; the same size and weight as the current font. This means that some fonts
+;;; are simply not reachable from some other fonts - if only one font comes
+;;; in only one point size (like "Nil", which comes only in 2), you will never
+;;; be able to select it. It would be better if the items on the Fonts menu
+;;; were always selectable, and selecting them would set the size to be the
+;;; closest size to the current font's size.
+;;;
+;;; This attempts to change all other faces in an analagous way to the change
+;;; that was made to the default face; if it can't, it will skip over the face.
+;;; However, this could leave incongruous font sizes around, which may cause
+;;; some nonreversibility problems if further changes are made. Perhaps it
+;;; should remember the initial fonts of all faces, and derive all subsequent
+;;; fonts from that initial state.
+;;;
+;;; xfontsel(1) is a lot more flexible (but probably harder to understand).
+;;;
+;;; The code to construct menus from all of the x11 fonts available from the
+;;; server is autoloaded and executed the very first time that one of the Font
+;;; menus is selected on each device. That is, if XEmacs has frames on two
+;;; different devices, then separate font menu information will be maintained
+;;; for each X display. If the font path changes after emacs has already
+;;; asked the X server on a particular display for its list of fonts, this
+;;; won't notice. Also, the first time that a font menu is posted on each
+;;; display will entail a lengthy delay, but that's better than slowing down
+;;; XEmacs startup. At any time (i.e.: after a font-path change or
+;;; immediately after device creation), you can call
+;;; `reset-device-font-menus' to rebuild the menus from all currently
+;;; available fonts.
+;;;
+;;; There is knowledge here about the regexp match numbers in
+;;; `x-font-regexp' and `x-font-regexp-foundry-and-family' defined in
+;;; x-faces.el.
+;;;
+;;; There are at least three kinds of fonts under X11r5:
+;;;
+;;; - bitmap fonts, which can be assumed to look as good as possible;
+;;; - bitmap fonts which have been (or can be) automatically scaled to
+;;; a new size, and which almost always look awful;
+;;; - and true outline fonts, which should look ok at any size, but in
+;;; practice (on at least some systems) look awful at any size, and
+;;; even in theory are unlikely ever to look as good as non-scaled
+;;; bitmap fonts.
+;;;
+;;; It would be nice to get this code to look for non-scaled bitmap fonts
+;;; first, then outline fonts, then scaled bitmap fonts as a last resort.
+;;; But it's not clear to me how to tell them apart based on their truenames
+;;; and/or the result of XListFonts(). I welcome any and all explanations
+;;; of the subtleties involved...
+;;;
+;;;
+;;; If You Think You'Re Seeing A Bug:
+;;; =================================
+;;; When reporting problems, send the following information:
+;;;
+;;; - Exactly what behavior you're seeing;
+;;; - The output of the `xlsfonts' program;
+;;; - The value of the variable `device-fonts-cache';
+;;; - The values of the following expressions, both before and after
+;;; making a selection from any of the fonts-related menus:
+;;; (face-font 'default)
+;;; (font-truename (face-font 'default))
+;;; (font-properties (face-font 'default))
+;;; - The values of the following variables after making a selection:
+;;; font-menu-preferred-resolution
+;;; font-menu-registry-encoding
+;;;
+;;; There is a common misconception that "*-courier-medium-r-*-11-*", also
+;;; known as "-adobe-courier-medium-r-normal--11-80-100-100-m-60-iso8859-1",
+;;; is an 11-point font. It is not -- it is an 11-pixel font at 100dpi,
+;;; which is an 8-point font (the number after -11- is the size in tenths
+;;; of points). So if you expect to be seeing an "11" entry in the "Size"
+;;; menu and are not, this may be why.
+;;;
+;;; In the real world (aka Solaris), one has to deal with fonts that
+;;; appear to be medium-i but are really light-r, and fonts that
+;;; resolve to different resolutions depending on the charset:
+;;;
+;;; (font-instance-truename
+;;; (make-font-instance "-*-mincho-medium-i-normal-*-*-*-*-*-*-*-jisx0201*-*"))
+;;; ==>
+;;; "-morisawa-ryumin light kl-light-r-normal--10-100-72-72-m-50-jisx0201.1976-0"
+;;;
+;;; (list-fonts "-dt-interface user-medium-r-normal-s*-*-*-*-*-*-*-*-*")
+;;; ==>
+;;; ("-dt-interface user-medium-r-normal-s sans-12-120-72-72-m-70-iso8859-1"
+;;; "-dt-interface user-medium-r-normal-s-14-120-75-75-m-120-jisx0208.1983-0"
+;;; "-dt-interface user-medium-r-normal-s-14-120-75-75-m-60-jisx0201.1976-0")
+
+;;; Code:
+
+;; #### - implement these...
+;;
+;;; (defvar font-menu-ignore-proportional-fonts nil
+;;; "*If non-nil, then the font menu will only show fixed-width fonts.")
+
+;;;###autoload
+(defcustom font-menu-ignore-scaled-fonts t
+ "*If non-nil, then the font menu will try to show only bitmap fonts."
+ :type 'boolean
+ :group 'x)
+
+;;;###autoload
+(defcustom font-menu-this-frame-only-p nil
+ "*If non-nil, then changing the default font from the font menu will only
+affect one frame instead of all frames."
+ :type 'boolean
+ :group 'x)
+
+;; only call XListFonts (and parse) once per device.
+;; ( (device . [parsed-list-fonts family-menu size-menu weight-menu]) ...)
+(defvar device-fonts-cache nil)
+
+(defvar font-menu-registry-encoding nil
+ "Registry and encoding to use with font menu fonts.")
+
+(defvar font-menu-preferred-resolution "*-*"
+ "Preferred horizontal and vertical font menu resolution (e.g. \"75-75\").")
+
+(defvar fonts-menu-junk-families
+ (purecopy
+ (mapconcat
+ #'identity
+ '("cursor" "glyph" "symbol" ; Obvious losers.
+ "\\`Ax...\\'" ; FrameMaker fonts - there are just way too
+ ; many of these, and there is a different
+ ; font family for each font face! Losers.
+ ; "Axcor" -> "Applix Courier Roman",
+ ; "Axcob" -> "Applix Courier Bold", etc.
+ )
+ "\\|"))
+ "A regexp matching font families which are uninteresting (e.g. cursor fonts).")
+
+(eval-when-compile
+ (defsubst device-fonts-cache ()
+ (or (cdr (assq (selected-device) device-fonts-cache))
+ (reset-device-font-menus (selected-device)))))
+
+(defun hack-font-truename (fn)
+ "Filter the output of `font-instance-truename' to deal with Japanese fontsets."
+ (if (string-match "," (font-instance-truename fn))
+ (let ((fpnt (nth 8 (split-string (font-instance-name fn) "-")))
+ (flist (split-string (font-instance-truename fn) ","))
+ ret)
+ (while flist
+ (if (string-equal fpnt (nth 8 (split-string (car flist) "-")))
+ (progn (setq ret (car flist)) (setq flist nil))
+ (setq flist (cdr flist))
+ ))
+ ret)
+ (font-instance-truename fn)))
+
+;;;###autoload
+(fset 'install-font-menus 'reset-device-font-menus)
+(make-obsolete 'install-font-menus 'reset-device-font-menus)
+
+(defvar x-font-regexp-ascii nil
+ "This is used to filter out font families that can't display ASCII text.
+It must be set at run-time.")
+
+(defun vassoc (key valist)
+ "Search VALIST for a vector whose first element is equal to KEY.
+See also `assoc'."
+ ;; by Stig@hackvan.com
+ (let (el)
+ (catch 'done
+ (while (setq el (pop valist))
+ (and (equal key (aref el 0))
+ (throw 'done el))))))
+
+;;;###autoload
+(defun reset-device-font-menus (&optional device debug)
+ "Generates the `Font', `Size', and `Weight' submenus for the Options menu.
+This is run the first time that a font-menu is needed for each device.
+If you don't like the lazy invocation of this function, you can add it to
+`create-device-hook' and that will make the font menus respond more quickly
+when they are selected for the first time. If you add fonts to your system,
+or if you change your font path, you can call this to re-initialize the menus."
+ ;; by Stig@hackvan.com
+ ;; #### - this should implement a `menus-only' option, which would
+ ;; recalculate the menus from the cache w/o having to do list-fonts again.
+ (message "Getting list of fonts from server... ")
+ (if (or noninteractive
+ (not (or device (setq device (selected-device))))
+ (not (eq (device-type device) 'x)))
+ nil
+ (unless x-font-regexp-ascii
+ (setq x-font-regexp-ascii (if (featurep 'mule)
+ (charset-registry 'ascii)
+ "iso8859-1")))
+ (setq font-menu-registry-encoding
+ (if (featurep 'mule) "*-*" "iso8859-1"))
+ (let ((case-fold-search t)
+ family size weight entry monospaced-p
+ dev-cache cache families sizes weights)
+ (dolist (name (cond ((null debug) ; debugging kludge
+ (list-fonts "*-*-*-*-*-*-*-*-*-*-*-*-*-*" device))
+ ((stringp debug) (split-string debug "\n"))
+ (t debug)))
+ (when (and (string-match x-font-regexp-ascii name)
+ (string-match x-font-regexp name))
+ (setq weight (capitalize (match-string 1 name))
+ size (string-to-int (match-string 6 name)))
+ (or (string-match x-font-regexp-foundry-and-family name)
+ (error "internal error"))
+ (setq family (capitalize (match-string 1 name)))
+ (or (string-match x-font-regexp-spacing name)
+ (error "internal error"))
+ (setq monospaced-p (string= "m" (match-string 1 name)))
+ (unless (string-match fonts-menu-junk-families family)
+ (setq entry (or (vassoc family cache)
+ (car (setq cache
+ (cons (vector family nil nil t)
+ cache)))))
+ (or (member family families) (push family families))
+ (or (member weight weights) (push weight weights))
+ (or (member size sizes) (push size sizes))
+ (or (member weight (aref entry 1)) (push weight (aref entry 1)))
+ (or (member size (aref entry 2)) (push size (aref entry 2)))
+ (aset entry 3 (and (aref entry 3) monospaced-p)))))
+ ;;
+ ;; Hack scalable fonts.
+ ;; Some fonts come only in scalable versions (the only size is 0)
+ ;; and some fonts come in both scalable and non-scalable versions
+ ;; (one size is 0). If there are any scalable fonts at all, make
+ ;; sure that the union of all point sizes contains at least some
+ ;; common sizes - it's possible that some sensible sizes might end
+ ;; up not getting mentioned explicitly.
+ ;;
+ (if (member 0 sizes)
+ (let ((common '(60 80 100 120 140 160 180 240)))
+ (while common
+ (or;;(member (car common) sizes) ; not enough slack
+ (let ((rest sizes)
+ (done nil))
+ (while (and (not done) rest)
+ (if (and (> (car common) (- (car rest) 5))
+ (< (car common) (+ (car rest) 5)))
+ (setq done t))
+ (setq rest (cdr rest)))
+ done)
+ (setq sizes (cons (car common) sizes)))
+ (setq common (cdr common)))
+ (setq sizes (delq 0 sizes))))
+
+ (setq families (sort families 'string-lessp)
+ weights (sort weights 'string-lessp)
+ sizes (sort sizes '<))
+
+ (dolist (entry cache)
+ (aset entry 1 (sort (aref entry 1) 'string-lessp))
+ (aset entry 2 (sort (aref entry 2) '<)))
+
+ (message "Getting list of fonts from server... done.")
+
+ (setq dev-cache (assq device device-fonts-cache))
+ (or dev-cache
+ (setq dev-cache (car (push (list device) device-fonts-cache))))
+ (setcdr
+ dev-cache
+ (vector
+ cache
+ (mapcar (lambda (x)
+ (vector x
+ (list 'font-menu-set-font x nil nil)
+ ':style 'radio ':active nil ':selected nil))
+ families)
+ (mapcar (lambda (x)
+ (vector (if (/= 0 (% x 10))
+ ;; works with no LISP_FLOAT_TYPE
+ (concat (int-to-string (/ x 10)) "."
+ (int-to-string (% x 10)))
+ (int-to-string (/ x 10)))
+ (list 'font-menu-set-font nil nil x)
+ ':style 'radio ':active nil ':selected nil))
+ sizes)
+ (mapcar (lambda (x)
+ (vector x
+ (list 'font-menu-set-font nil x nil)
+ ':style 'radio ':active nil ':selected nil))
+ weights)))
+ (cdr dev-cache))))
+
+;; Extract font information from a face. We examine both the
+;; user-specified font name and the canonical (`true') font name.
+;; These can appear to have totally different properties.
+;; For examples, see the prolog above.
+
+;; We use the user-specified one if possible, else use the truename.
+;; If the user didn't specify one (with "-dt-*-*", for example)
+;; get the truename and use the possibly suboptimal data from that.
+(defun* font-menu-font-data (face dcache)
+ (let* ((case-fold-search t)
+ (domain (if font-menu-this-frame-only-p
+ (selected-frame)
+ (selected-device)))
+ (name (font-instance-name (face-font-instance face domain)))
+ (truename (font-instance-truename
+ (face-font-instance face domain
+ (if (featurep 'mule) 'ascii))))
+ family size weight entry slant)
+ (when (string-match x-font-regexp-foundry-and-family name)
+ (setq family (capitalize (match-string 1 name)))
+ (setq entry (vassoc family (aref dcache 0))))
+ (when (and (null entry)
+ (string-match x-font-regexp-foundry-and-family truename))
+ (setq family (capitalize (match-string 1 truename)))
+ (setq entry (vassoc family (aref dcache 0))))
+ (when (null entry)
+ (return-from font-menu-font-data (make-vector 5 nil)))
+
+ (when (string-match x-font-regexp name)
+ (setq weight (capitalize (match-string 1 name)))
+ (setq size (string-to-int (match-string 6 name))))
+
+ (when (string-match x-font-regexp truename)
+ (when (not (member weight (aref entry 1)))
+ (setq weight (capitalize (match-string 1 truename))))
+ (when (not (member size (aref entry 2)))
+ (setq size (string-to-int (match-string 6 truename))))
+ (setq slant (capitalize (match-string 2 truename))))
+
+ (vector entry family size weight slant)))
+
+;;;###autoload
+(defun font-menu-family-constructor (ignored)
+ (catch 'menu
+ (unless (eq 'x (device-type (selected-device)))
+ (throw 'menu '(["Cannot parse current font" ding nil])))
+ (let* ((dcache (device-fonts-cache))
+ (font-data (font-menu-font-data 'default dcache))
+ (entry (aref font-data 0))
+ (family (aref font-data 1))
+ (size (aref font-data 2))
+ (weight (aref font-data 3))
+ f)
+ (unless family
+ (throw 'menu '(["Cannot parse current font" ding nil])))
+ ;; Items on the Font menu are enabled iff that font exists in
+ ;; the same size and weight as the current font (scalable fonts
+ ;; exist in every size). Only the current font is marked as
+ ;; selected.
+ (mapcar
+ (lambda (item)
+ (setq f (aref item 0)
+ entry (vassoc f (aref dcache 0)))
+ (if (and (member weight (aref entry 1))
+ (or (member size (aref entry 2))
+ (and (not font-menu-ignore-scaled-fonts)
+ (member 0 (aref entry 2)))))
+ (enable-menu-item item)
+ (disable-menu-item item))
+ (if (string-equal family f)
+ (select-toggle-menu-item item)
+ (deselect-toggle-menu-item item))
+ item)
+ (aref dcache 1)))))
+
+;;;###autoload
+(defun font-menu-size-constructor (ignored)
+ (catch 'menu
+ (unless (eq 'x (device-type (selected-device)))
+ (throw 'menu '(["Cannot parse current font" ding nil])))
+ (let* ((dcache (device-fonts-cache))
+ (font-data (font-menu-font-data 'default dcache))
+ (entry (aref font-data 0))
+ (family (aref font-data 1))
+ (size (aref font-data 2))
+ ;;(weight (aref font-data 3))
+ s)
+ (unless family
+ (throw 'menu '(["Cannot parse current font" ding nil])))
+ ;; Items on the Size menu are enabled iff current font has
+ ;; that size. Only the size of the current font is selected.
+ ;; (If the current font comes in size 0, it is scalable, and
+ ;; thus has every size.)
+ (mapcar
+ (lambda (item)
+ (setq s (nth 3 (aref item 1)))
+ (if (or (member s (aref entry 2))
+ (and (not font-menu-ignore-scaled-fonts)
+ (member 0 (aref entry 2))))
+ (enable-menu-item item)
+ (disable-menu-item item))
+ (if (eq size s)
+ (select-toggle-menu-item item)
+ (deselect-toggle-menu-item item))
+ item)
+ (aref dcache 2)))))
+
+;;;###autoload
+(defun font-menu-weight-constructor (ignored)
+ (catch 'menu
+ (unless (eq 'x (device-type (selected-device)))
+ (throw 'menu '(["Cannot parse current font" ding nil])))
+ (let* ((dcache (device-fonts-cache))
+ (font-data (font-menu-font-data 'default dcache))
+ (entry (aref font-data 0))
+ (family (aref font-data 1))
+ ;;(size (aref font-data 2))
+ (weight (aref font-data 3))
+ w)
+ (unless family
+ (throw 'menu '(["Cannot parse current font" ding nil])))
+ ;; Items on the Weight menu are enabled iff current font
+ ;; has that weight. Only the weight of the current font
+ ;; is selected.
+ (mapcar
+ (lambda (item)
+ (setq w (aref item 0))
+ (if (member w (aref entry 1))
+ (enable-menu-item item)
+ (disable-menu-item item))
+ (if (string-equal weight w)
+ (select-toggle-menu-item item)
+ (deselect-toggle-menu-item item))
+ item)
+ (aref dcache 3)))))
+
+\f
+;;; Changing font sizes
+
+(defun font-menu-set-font (family weight size)
+ ;; This is what gets run when an item is selected from any of the three
+ ;; fonts menus. It needs to be rather clever.
+ ;; (size is measured in 10ths of points.)
+ (let* ((dcache (device-fonts-cache))
+ (font-data (font-menu-font-data 'default dcache))
+ (from-family (aref font-data 1))
+ (from-size (aref font-data 2))
+ (from-weight (aref font-data 3))
+ (from-slant (aref font-data 4))
+ new-default-face-font)
+ (unless from-family
+ (signal 'error '("couldn't parse font name for default face")))
+ (setq new-default-face-font
+ (font-menu-load-font (or family from-family)
+ (or weight from-weight)
+ (or size from-size)
+ from-slant
+ font-menu-preferred-resolution))
+ (dolist (face (delq 'default (face-list)))
+ (when (face-font-instance face)
+ (message "Changing font of `%s'..." face)
+ (condition-case c
+ (font-menu-change-face face
+ from-family from-weight from-size
+ family weight size)
+ (error
+ (display-error c nil)
+ (sit-for 1)))))
+ ;; Set the default face's font after hacking the other faces, so that
+ ;; the frame size doesn't change until we are all done.
+
+ ;;; WMP - we need to honor font-menu-this-frame-only-p here!
+ (set-face-font 'default new-default-face-font
+ (and font-menu-this-frame-only-p (selected-frame)))
+ (message "Font %s" (face-font-name 'default))))
+
+
+(defun font-menu-change-face (face
+ from-family from-weight from-size
+ to-family to-weight to-size)
+ (or (symbolp face) (signal 'wrong-type-argument (list 'symbolp face)))
+ (let* ((dcache (device-fonts-cache))
+ (font-data (font-menu-font-data face dcache))
+ (face-family (aref font-data 1))
+ (face-size (aref font-data 2))
+ (face-weight (aref font-data 3))
+ (face-slant (aref font-data 4)))
+
+ (or face-family
+ (signal 'error (list "couldn't parse font name for face" face)))
+
+ ;; If this face matches the old default face in the attribute we
+ ;; are changing, then change it to the new attribute along that
+ ;; dimension. Also, the face must have its own global attribute.
+ ;; If its value is inherited, we don't touch it. If any of this
+ ;; is not true, we leave it alone.
+ (when (and (face-font face 'global)
+ (cond
+ (to-family (string-equal face-family from-family))
+ (to-weight (string-equal face-weight from-weight))
+ (to-size (= face-size from-size))))
+ (set-face-font face
+ (font-menu-load-font (or to-family face-family)
+ (or to-weight face-weight)
+ (or to-size face-size)
+ face-slant
+ font-menu-preferred-resolution)
+ (and font-menu-this-frame-only-p
+ (selected-frame))))))
+
+(defun font-menu-load-font (family weight size slant resolution)
+ "Try to load a font with the requested properties.
+The weight, slant and resolution are only hints."
+ (when (integerp size) (setq size (int-to-string size)))
+ (let (font)
+ (catch 'got-font
+ (dolist (weight (list weight "*"))
+ (dolist (slant
+ (cond ((string-equal slant "O") '("O" "I" "*"))
+ ((string-equal slant "I") '("I" "O" "*"))
+ ((string-equal slant "*") '("*"))
+ (t (list slant "*"))))
+ (dolist (resolution
+ (if (string-equal resolution "*-*")
+ (list resolution)
+ (list resolution "*-*")))
+ (when (setq font
+ (make-font-instance
+ (concat "-*-" family "-" weight "-" slant "-*-*-*-"
+ size "-" resolution "-*-*-"
+ font-menu-registry-encoding)
+ nil t))
+ (throw 'got-font font))))))))
+
+(defun flush-device-fonts-cache (device)
+ ;; by Stig@hackvan.com
+ (let ((elt (assq device device-fonts-cache)))
+ (and elt
+ (setq device-fonts-cache (delq elt device-fonts-cache)))))
+
+(add-hook 'delete-device-hook 'flush-device-fonts-cache)
+
+(provide 'x-font-menu)
+
+;;; x-font-menu.el ends here
projects / chise / xemacs-chise.git.1 / blobdiff