mirror of
https://git.savannah.gnu.org/git/emacs.git
synced 2024-11-22 07:09:54 +00:00
652 lines
26 KiB
EmacsLisp
652 lines
26 KiB
EmacsLisp
;;; face-remap.el --- Functions for managing `face-remapping-alist' -*- lexical-binding: t -*-
|
||
;;
|
||
;; Copyright (C) 2008-2024 Free Software Foundation, Inc.
|
||
;;
|
||
;; Author: Miles Bader <miles@gnu.org>
|
||
;; Keywords: faces, face remapping, display, user commands
|
||
;;
|
||
;; This file is part of GNU Emacs.
|
||
;;
|
||
;; GNU Emacs 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 3 of the License, or
|
||
;; (at your option) any later version.
|
||
;;
|
||
;; GNU Emacs 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 GNU Emacs. If not, see <https://www.gnu.org/licenses/>.
|
||
;;
|
||
|
||
;;; Commentary:
|
||
|
||
;; This file defines some simple operations that can be used for
|
||
;; maintaining the `face-remapping-alist' in a cooperative way. This is
|
||
;; especially important for the `default' face.
|
||
;;
|
||
;; Each face-remapping definition in `face-remapping-alist' added by
|
||
;; this code uses the form:
|
||
;;
|
||
;; (face RELATIVE_SPECS_1 RELATIVE_SPECS_2 ... BASE_SPECS)
|
||
;;
|
||
;; The "specs" values are lists of face names or face attribute-value
|
||
;; pairs, and are merged together, with earlier values taking precedence.
|
||
;;
|
||
;; The RELATIVE_SPECS_* values are added by `face-remap-add-relative'
|
||
;; (and removed by `face-remap-remove-relative', and are intended for
|
||
;; face "modifications" (such as increasing the size). Typical users of
|
||
;; relative specs would be minor modes.
|
||
;;
|
||
;; BASE_SPECS is the lowest-priority value, and by default is just the
|
||
;; face name, which causes the global definition of that face to be used.
|
||
;;
|
||
;; A non-default value of BASE_SPECS may also be set using
|
||
;; `face-remap-set-base'. Because this _overwrites_ the default
|
||
;; value inheriting from the global face definition, it is up to the
|
||
;; caller of face-remap-set-base to add such inheritance if it is
|
||
;; desired. A typical use of face-remap-set-base would be a major
|
||
;; mode setting face remappings, e.g., of the default face.
|
||
;;
|
||
;; All modifications cause face-remapping-alist to be made buffer-local.
|
||
|
||
;;; Code:
|
||
|
||
|
||
;; ----------------------------------------------------------------
|
||
;; Utility functions
|
||
|
||
;; Names of face attributes corresponding to lisp face-vector positions.
|
||
;; This variable should probably be defined in C code where the actual
|
||
;; definitions are available.
|
||
;; :vector must be always at the end as a guard
|
||
;;
|
||
(defvar internal-lisp-face-attributes
|
||
[nil
|
||
:family :foundry :width :height :weight :slant :underline
|
||
:inverse-video
|
||
:foreground :background :stipple :overline :strike-through :box
|
||
:font :inherit :fontset :distant-foreground :extend :vector])
|
||
|
||
(defun face-attrs--make-indirect-safe ()
|
||
"Deep-copy the buffer's `face-remapping-alist' upon cloning the buffer."
|
||
(setq-local face-remapping-alist
|
||
(mapcar #'copy-tree face-remapping-alist)))
|
||
|
||
(add-hook 'clone-indirect-buffer-hook #'face-attrs--make-indirect-safe)
|
||
|
||
(defun face-attrs-more-relative-p (attrs1 attrs2)
|
||
"Return non-nil if ATTRS1 is \"more relative\" than ATTRS2.
|
||
We define this as meaning that ATTRS1 contains a greater number of
|
||
relative face-attributes than ATTRS2. A face attribute is considered
|
||
relative if `face-attribute-relative-p' returns non-nil.
|
||
|
||
ATTRS1 and ATTRS2 may be any value suitable for a `face' text
|
||
property, including face names, lists of face names,
|
||
face-attribute plists, etc.
|
||
|
||
This function can be used as a predicate with `sort', to sort
|
||
face lists so that more specific faces are located near the end."
|
||
(unless (vectorp attrs1)
|
||
(setq attrs1 (face-attributes-as-vector attrs1)))
|
||
(unless (vectorp attrs2)
|
||
(setq attrs2 (face-attributes-as-vector attrs2)))
|
||
(let ((rel1-count 0) (rel2-count 0))
|
||
(dotimes (i (length attrs1))
|
||
(let ((attr (aref internal-lisp-face-attributes i)))
|
||
(when attr
|
||
(when (face-attribute-relative-p attr (aref attrs1 i))
|
||
(setq rel1-count (+ rel1-count 1)))
|
||
(when (face-attribute-relative-p attr (aref attrs2 i))
|
||
(setq rel2-count (+ rel2-count 1))))))
|
||
(< rel1-count rel2-count)))
|
||
|
||
(defun face-remap-order (entry)
|
||
"Order ENTRY so that more relative face specs are near the beginning.
|
||
The list structure of ENTRY may be destructively modified."
|
||
(setq entry (nreverse entry))
|
||
(setcdr entry (sort (cdr entry) #'face-attrs-more-relative-p))
|
||
(nreverse entry))
|
||
|
||
;;;###autoload
|
||
(defun face-remap-add-relative (face &rest specs)
|
||
"Add a face remapping entry of FACE to SPECS in the current buffer.
|
||
Return a cookie which can be used to delete this remapping with
|
||
`face-remap-remove-relative'.
|
||
|
||
The remaining arguments, SPECS, should form a list of faces.
|
||
Each list element should be either a face name or a property list
|
||
of face attribute/value pairs. If more than one face is listed,
|
||
that specifies an aggregate face, in the same way as in a `face'
|
||
text property, except for possible priority changes noted below.
|
||
|
||
The face remapping specified by SPECS takes effect alongside the
|
||
remappings from other calls to `face-remap-add-relative' for the
|
||
same FACE, as well as the normal definition of FACE (at lowest
|
||
priority). This function tries to sort multiple remappings for
|
||
the same face, so that remappings specifying relative face
|
||
attributes are applied after remappings specifying absolute face
|
||
attributes.
|
||
|
||
The base (lowest priority) remapping may be set to something
|
||
other than the normal definition of FACE via `face-remap-set-base'."
|
||
(while (and (consp specs) (null (cdr specs)))
|
||
(setq specs (car specs)))
|
||
(make-local-variable 'face-remapping-alist)
|
||
(let ((entry (assq face face-remapping-alist)))
|
||
(when (null entry)
|
||
(setq entry (list face face)) ; explicitly merge with global def
|
||
(push entry face-remapping-alist))
|
||
(let ((faces (cdr entry)))
|
||
(if (symbolp faces)
|
||
(setq faces (list faces)))
|
||
(setcdr entry (face-remap-order (cons specs faces)))
|
||
;; Force redisplay of this buffer.
|
||
(force-mode-line-update))
|
||
(cons face specs)))
|
||
|
||
(defun face-remap-remove-relative (cookie)
|
||
"Remove a face remapping previously added by `face-remap-add-relative'.
|
||
COOKIE should be the return value from that function."
|
||
(let ((remapping (assq (car cookie) face-remapping-alist)))
|
||
(when remapping
|
||
(let ((updated-entries (remq (cdr cookie) (cdr remapping))))
|
||
(unless (eq updated-entries (cdr remapping))
|
||
(setcdr remapping updated-entries)
|
||
(when (or (null updated-entries)
|
||
(and (eq (car-safe updated-entries) (car cookie))
|
||
(null (cdr updated-entries))))
|
||
(setq face-remapping-alist
|
||
(remq remapping face-remapping-alist))
|
||
;; Force redisplay of this buffer.
|
||
(force-mode-line-update))
|
||
(cdr cookie))))))
|
||
|
||
;;;###autoload
|
||
(defun face-remap-reset-base (face)
|
||
"Set the base remapping of FACE to the normal definition of FACE.
|
||
This causes the remappings specified by `face-remap-add-relative'
|
||
to apply on top of the normal definition of FACE."
|
||
(let ((entry (assq face face-remapping-alist)))
|
||
(when entry
|
||
;; If there's nothing except a base remapping, we simply remove
|
||
;; the entire remapping entry, as setting the base to the default
|
||
;; would be the same as the global definition. Otherwise, we
|
||
;; modify the base remapping.
|
||
(if (null (cddr entry)) ; nothing except base remapping
|
||
(setq face-remapping-alist ; so remove entire entry
|
||
(remq entry face-remapping-alist))
|
||
(setcar (last entry) face))
|
||
;; Force redisplay of this buffer.
|
||
(force-mode-line-update)))) ; otherwise, just inherit global def
|
||
|
||
;;;###autoload
|
||
(defun face-remap-set-base (face &rest specs)
|
||
"Set the base remapping of FACE in the current buffer to SPECS.
|
||
This causes the remappings specified by `face-remap-add-relative'
|
||
to apply on top of the face specification given by SPECS.
|
||
|
||
The remaining arguments, SPECS, specify the base of the remapping.
|
||
Each one of SPECS should be either a face name or a property list
|
||
of face attribute/value pairs, like in a `face' text property.
|
||
|
||
If SPECS is empty or a single face `eq' to FACE, call `face-remap-reset-base'
|
||
to use the normal definition of FACE as the base remapping; note that
|
||
this is different from SPECS containing a single value nil, which means
|
||
not to inherit from the global definition of FACE at all."
|
||
;; Simplify the specs in the case where it's just a single face (and
|
||
;; it's not a list with just a nil).
|
||
(while (and (consp specs) (not (null (car specs))) (null (cdr specs)))
|
||
(setq specs (car specs)))
|
||
(if (or (null specs)
|
||
(eq specs face)) ; default
|
||
;; Set entry back to default
|
||
(face-remap-reset-base face)
|
||
;; Set the base remapping
|
||
(make-local-variable 'face-remapping-alist)
|
||
(let ((entry (assq face face-remapping-alist)))
|
||
(if entry
|
||
(setcar (last entry) specs) ; overwrite existing base entry
|
||
(push (list face specs) face-remapping-alist)))
|
||
;; Force redisplay of this buffer.
|
||
(force-mode-line-update)))
|
||
|
||
|
||
;; ----------------------------------------------------------------
|
||
;; text-scale-mode
|
||
|
||
(defcustom text-scale-mode-step 1.2
|
||
"Scale factor used by `text-scale-mode'.
|
||
Each positive or negative step scales the size of the `default'
|
||
face's font by this amount."
|
||
:group 'display
|
||
:type 'number
|
||
:version "23.1")
|
||
|
||
(defvar-local text-scale-mode-remapping nil
|
||
"Current remapping cookie for `text-scale-mode'.")
|
||
|
||
(defvar-local text-scale-mode-lighter "+0"
|
||
"Lighter displayed for `text-scale-mode' in mode-line minor-mode list.")
|
||
|
||
(defvar-local text-scale-mode-amount 0
|
||
"Number of steps that `text-scale-mode' will increase/decrease text height.")
|
||
|
||
(defvar-local text-scale-remap-header-line nil
|
||
"If non-nil, text scaling may change font size of header lines too.")
|
||
|
||
(defun face-remap--clear-remappings ()
|
||
(dolist (remapping
|
||
;; This is a bit messy to stay backwards compatible.
|
||
;; In the future, this can be simplified to just use
|
||
;; `text-scale-mode-remapping'.
|
||
(if (consp (car-safe text-scale-mode-remapping))
|
||
text-scale-mode-remapping
|
||
(list text-scale-mode-remapping)))
|
||
(face-remap-remove-relative remapping))
|
||
(setq text-scale-mode-remapping nil))
|
||
|
||
(defun face-remap--remap-face (sym)
|
||
(push (face-remap-add-relative sym
|
||
:height
|
||
(expt text-scale-mode-step
|
||
text-scale-mode-amount))
|
||
text-scale-mode-remapping))
|
||
|
||
(define-minor-mode text-scale-mode
|
||
"Minor mode for displaying buffer text in a larger/smaller font.
|
||
|
||
The amount of scaling is determined by the variable
|
||
`text-scale-mode-amount': one step scales the global default
|
||
face size by the value of the variable `text-scale-mode-step'
|
||
\(a negative amount shrinks the text).
|
||
|
||
The `text-scale-increase', `text-scale-decrease', and
|
||
`text-scale-set' functions may be used to interactively modify
|
||
the variable `text-scale-mode-amount' (they also enable or
|
||
disable `text-scale-mode' as necessary).
|
||
|
||
If `text-scale-remap-header-line' is non-nil, also change
|
||
the font size of the header line."
|
||
:lighter (" " text-scale-mode-lighter)
|
||
(face-remap--clear-remappings)
|
||
(setq text-scale-mode-lighter
|
||
(format (if (>= text-scale-mode-amount 0) "+%d" "%d")
|
||
text-scale-mode-amount))
|
||
(when text-scale-mode
|
||
(face-remap--remap-face 'default)
|
||
(when text-scale-remap-header-line
|
||
(face-remap--remap-face 'header-line)))
|
||
(force-window-update (current-buffer)))
|
||
|
||
(defun text-scale--refresh (symbol newval operation where)
|
||
"Watcher for `text-scale-remap-header-line'.
|
||
See `add-variable-watcher'."
|
||
(when (and (eq symbol 'text-scale-remap-header-line)
|
||
(eq operation 'set)
|
||
text-scale-mode)
|
||
(with-current-buffer where
|
||
(let ((text-scale-remap-header-line newval))
|
||
(text-scale-mode 1)))))
|
||
(add-variable-watcher 'text-scale-remap-header-line #'text-scale--refresh)
|
||
|
||
(defun text-scale-min-amount ()
|
||
"Return the minimum amount of text-scaling we allow."
|
||
;; When the resulting pixel-height of characters will become smaller
|
||
;; than 1 pixel, we can expect trouble from the display engine.
|
||
;; E.g., it requires that the character glyph's ascent is
|
||
;; non-negative.
|
||
(log (/ 1.0 (frame-char-height)) text-scale-mode-step))
|
||
|
||
(defun text-scale-max-amount ()
|
||
"Return the maximum amount of text-scaling we allow."
|
||
;; The display engine uses a 16-bit short for pixel-width of
|
||
;; characters, thus the 0xffff limitation. It also makes no sense
|
||
;; to have characters wider than the display.
|
||
(log (/ (min (display-pixel-width) #xffff)
|
||
(frame-char-width))
|
||
text-scale-mode-step))
|
||
|
||
;;;###autoload
|
||
(defun text-scale-set (level)
|
||
"Set the scale factor of the default face in the current buffer to LEVEL.
|
||
If LEVEL is non-zero, `text-scale-mode' is enabled, otherwise it is disabled.
|
||
|
||
LEVEL is a number of steps, with 0 representing the default size.
|
||
Each step scales the height of the default face by the variable
|
||
`text-scale-mode-step' (a negative number decreases the height by
|
||
the same amount)."
|
||
(interactive "p")
|
||
(setq text-scale-mode-amount
|
||
(max (min level (text-scale-max-amount)) (text-scale-min-amount)))
|
||
(text-scale-mode (if (zerop text-scale-mode-amount) -1 1)))
|
||
|
||
;;;###autoload
|
||
(defun text-scale-increase (inc)
|
||
"Increase the font size of the default face in current buffer by INC steps.
|
||
If the new height is other than the default, `text-scale-mode' is enabled.
|
||
|
||
Each step scales the height of the default face by the variable
|
||
`text-scale-mode-step' (a negative number of steps decreases the
|
||
height by the same amount). As a special case, an argument of 0
|
||
will remove any scaling currently active."
|
||
(interactive "p")
|
||
(let* ((current-value (if text-scale-mode text-scale-mode-amount 0))
|
||
(new-value (if (= inc 0) 0 (+ current-value inc))))
|
||
(if (or (> new-value (text-scale-max-amount))
|
||
(< new-value (text-scale-min-amount)))
|
||
(user-error "Cannot %s the font size any further"
|
||
(if (> inc 0) "increase" "decrease")))
|
||
(setq text-scale-mode-amount new-value))
|
||
(text-scale-mode (if (zerop text-scale-mode-amount) -1 1)))
|
||
|
||
;;;###autoload
|
||
(defun text-scale-decrease (dec)
|
||
"Decrease the font size of the default face in the current buffer by DEC steps.
|
||
See `text-scale-increase' for more details."
|
||
(interactive "p")
|
||
(text-scale-increase (- dec)))
|
||
|
||
;;;###autoload (define-key ctl-x-map [(control ?+)] 'text-scale-adjust)
|
||
;;;###autoload (define-key ctl-x-map [(control ?-)] 'text-scale-adjust)
|
||
;;;###autoload (define-key ctl-x-map [(control ?=)] 'text-scale-adjust)
|
||
;;;###autoload (define-key ctl-x-map [(control ?0)] 'text-scale-adjust)
|
||
;;;###autoload
|
||
(defun text-scale-adjust (inc)
|
||
"Adjust the font size in the current buffer by INC steps.
|
||
Interactively, INC is the prefix numeric argument, and defaults to 1.
|
||
|
||
The actual adjustment made depends on the final component of the
|
||
keybinding used to invoke the command, with all modifiers removed:
|
||
|
||
\\`+', \\`=' Increase font size in current buffer by one step
|
||
\\`-' Decrease font size in current buffer by one step
|
||
\\`0' Reset the font size to the global default
|
||
|
||
After adjusting, continue to read input events and further adjust
|
||
the font size as long as the input event (with all modifiers removed)
|
||
is one of the above characters.
|
||
|
||
Each step scales the height of the default face by the factor that
|
||
is the value of `text-scale-mode-step' (a negative number of steps
|
||
decreases the height by that factor). As a special case, an argument
|
||
of 0 will remove any scaling currently active, thus resetting the
|
||
font size to the original value.
|
||
|
||
This command is a special-purpose wrapper around the
|
||
`text-scale-increase' command which makes repetition convenient
|
||
even when it is bound in a non-top-level keymap. For binding in
|
||
a top-level keymap, `text-scale-increase' or
|
||
`text-scale-decrease' may be more appropriate.
|
||
|
||
Most faces are affected by these font size changes, but not faces
|
||
that have an explicit `:height' setting. The two exceptions to
|
||
this are the `default' and `header-line' faces: they will both be
|
||
scaled even if they have an explicit `:height' setting.
|
||
|
||
See also the related command `global-text-scale-adjust'. Unlike
|
||
that command, which scales the font size with a increment (and can
|
||
also optionally resize frames to keep the same number of lines and
|
||
characters per line), `text-scale-adjust' scales the font size with
|
||
a factor, `text-scale-mode-step'. With a small `text-scale-mode-step'
|
||
factor, the two commands behave similarly."
|
||
(interactive "p")
|
||
(let ((ev last-command-event)
|
||
(echo-keystrokes nil))
|
||
(let* ((base (event-basic-type ev))
|
||
(step
|
||
(pcase base
|
||
((or ?+ ?=) inc)
|
||
(?- (- inc))
|
||
(?0 0)
|
||
(_ inc))))
|
||
(text-scale-increase step)
|
||
(set-transient-map
|
||
(let ((map (make-sparse-keymap)))
|
||
(dolist (mods '(() (control)))
|
||
(dolist (key '(?+ ?= ?- ?0)) ;; = is often unshifted +.
|
||
(define-key map (vector (append mods (list key)))
|
||
(lambda () (interactive) (text-scale-adjust (abs inc))))))
|
||
map)
|
||
nil nil
|
||
"Use %k for further adjustment"))))
|
||
|
||
(defvar-local text-scale--pinch-start-scale 0
|
||
"The text scale at the start of a pinch sequence.")
|
||
|
||
;;;###autoload (define-key global-map [pinch] 'text-scale-pinch)
|
||
;;;###autoload
|
||
(defun text-scale-pinch (event)
|
||
"Adjust the height of the default face by the scale in the pinch event EVENT."
|
||
(interactive "e")
|
||
(when (not (eq (event-basic-type event) 'pinch))
|
||
(error "`text-scale-pinch' bound to bad event type"))
|
||
(let ((window (posn-window (nth 1 event)))
|
||
(scale (nth 4 event))
|
||
(dx (nth 2 event))
|
||
(dy (nth 3 event))
|
||
(angle (nth 5 event)))
|
||
(with-selected-window window
|
||
(when (and (zerop dx)
|
||
(zerop dy)
|
||
(zerop angle))
|
||
(setq text-scale--pinch-start-scale
|
||
(if text-scale-mode text-scale-mode-amount 0)))
|
||
(text-scale-set
|
||
(+ text-scale--pinch-start-scale
|
||
(round (log scale text-scale-mode-step)))))))
|
||
|
||
(defcustom global-text-scale-adjust-resizes-frames nil
|
||
"Whether `global-text-scale-adjust' resizes the frames."
|
||
:type '(choice (const :tag "Off" nil)
|
||
(const :tag "On" t))
|
||
:group 'display
|
||
:version "29.1")
|
||
|
||
(defcustom global-text-scale-adjust-limits '(10 . 500)
|
||
"Min/max values for `global-text-scale-adjust'.
|
||
This is a cons cell where the `car' has the minimum font size and
|
||
the `cdr' has the maximum font size, in units of 1/10 pt."
|
||
:version "29.1"
|
||
:group 'display
|
||
:type '(cons (integer :tag "Min")
|
||
(integer :tag "Max")))
|
||
|
||
(defvar global-text-scale-adjust--default-height nil)
|
||
|
||
(defvar global-text-scale-adjust--increment-factor 5)
|
||
|
||
;;;###autoload (define-key ctl-x-map [(control meta ?+)] 'global-text-scale-adjust)
|
||
;;;###autoload (define-key ctl-x-map [(control meta ?=)] 'global-text-scale-adjust)
|
||
;;;###autoload (define-key ctl-x-map [(control meta ?-)] 'global-text-scale-adjust)
|
||
;;;###autoload (define-key ctl-x-map [(control meta ?0)] 'global-text-scale-adjust)
|
||
;;;###autoload
|
||
(defun global-text-scale-adjust (increment)
|
||
"Change (a.k.a. \"adjust\") the font size of all faces by INCREMENT.
|
||
|
||
Interactively, INCREMENT is the prefix numeric argument, and defaults
|
||
to 1. Positive values of INCREMENT increase the font size, negative
|
||
values decrease it.
|
||
|
||
When you invoke this command, it performs the initial change of the
|
||
font size, and after that allows further changes by typing one of the
|
||
following keys immediately after invoking the command:
|
||
|
||
\\`+', \\`=' Globally increase the height of the default face
|
||
\\`-' Globally decrease the height of the default face
|
||
\\`0' Globally reset the height of the default face
|
||
|
||
(The change of the font size produced by these keys depends on the
|
||
final component of the key sequence, with all modifiers removed.)
|
||
|
||
Buffer-local face adjustments have higher priority than global
|
||
face adjustments.
|
||
|
||
The variable `global-text-scale-adjust-resizes-frames' controls
|
||
whether the frames are resized to keep the same number of lines
|
||
and characters per line when the font size is adjusted.
|
||
|
||
See also the related command `text-scale-adjust'. Unlike that
|
||
command, which scales the font size with a factor,
|
||
`global-text-scale-adjust' scales the font size with an
|
||
increment."
|
||
(interactive "p")
|
||
(when (display-graphic-p)
|
||
(unless global-text-scale-adjust--default-height
|
||
(setq global-text-scale-adjust--default-height
|
||
(face-attribute 'default :height)))
|
||
(let* ((key (event-basic-type last-command-event))
|
||
(echo-keystrokes nil)
|
||
(cur (face-attribute 'default :height))
|
||
(inc
|
||
(pcase key
|
||
(?- (* (- increment)
|
||
global-text-scale-adjust--increment-factor))
|
||
(?0 (- global-text-scale-adjust--default-height cur))
|
||
(_ (* increment
|
||
global-text-scale-adjust--increment-factor))))
|
||
(new (+ cur inc)))
|
||
(when (< (car global-text-scale-adjust-limits)
|
||
new
|
||
(cdr global-text-scale-adjust-limits))
|
||
(let ((frame-inhibit-implied-resize
|
||
(not global-text-scale-adjust-resizes-frames)))
|
||
(set-face-attribute 'default nil :height new)
|
||
(redisplay 'force)
|
||
(when (and (not (and (characterp key) (= key ?0)))
|
||
(= cur (face-attribute 'default :height)))
|
||
(setq global-text-scale-adjust--increment-factor
|
||
(1+ global-text-scale-adjust--increment-factor))
|
||
(global-text-scale-adjust increment))))
|
||
(when (characterp key)
|
||
(set-transient-map
|
||
(let ((map (make-sparse-keymap)))
|
||
(dolist (mod '(() (control meta)))
|
||
(dolist (key '(?+ ?= ?- ?0))
|
||
(define-key map (vector (append mod (list key)))
|
||
'global-text-scale-adjust)))
|
||
map)
|
||
nil nil
|
||
"Use %k for further adjustment")))))
|
||
|
||
|
||
;; ----------------------------------------------------------------
|
||
;; buffer-face-mode
|
||
|
||
(defcustom buffer-face-mode-face 'variable-pitch
|
||
"The face specification used by `buffer-face-mode'.
|
||
It may contain any value suitable for a `face' text property,
|
||
including a face name, a list of face names, a face attribute
|
||
plist, etc."
|
||
:type '(choice (face)
|
||
(repeat :tag "List of faces" face)
|
||
(plist :tag "Face property list"))
|
||
:group 'display
|
||
:version "23.1")
|
||
|
||
;; current remapping cookie for buffer-face-mode
|
||
(defvar-local buffer-face-mode-remapping nil)
|
||
|
||
;;;###autoload
|
||
(define-minor-mode buffer-face-mode
|
||
"Minor mode for a buffer-specific default face.
|
||
|
||
When enabled, the face specified by the variable
|
||
`buffer-face-mode-face' is used to display the buffer text."
|
||
:lighter " BufFace"
|
||
(when buffer-face-mode-remapping
|
||
(face-remap-remove-relative buffer-face-mode-remapping))
|
||
(setq buffer-face-mode-remapping
|
||
(and buffer-face-mode
|
||
(face-remap-add-relative 'default buffer-face-mode-face)))
|
||
(force-window-update (current-buffer)))
|
||
|
||
;;;###autoload
|
||
(defun buffer-face-set (&rest specs)
|
||
"Enable `buffer-face-mode', using face specs SPECS.
|
||
Each argument in SPECS should be a face, i.e. either a face name
|
||
or a property list of face attributes and values. If more than
|
||
one face is listed, that specifies an aggregate face, like in a
|
||
`face' text property. If SPECS is nil or omitted, disable
|
||
`buffer-face-mode'.
|
||
|
||
This function makes the variable `buffer-face-mode-face' buffer
|
||
local, and sets it to FACE."
|
||
(interactive (list (read-face-name "Set buffer face" (face-at-point t))))
|
||
(while (and (consp specs) (null (cdr specs)))
|
||
(setq specs (car specs)))
|
||
(if (null specs)
|
||
(buffer-face-mode 0)
|
||
(setq-local buffer-face-mode-face specs)
|
||
(buffer-face-mode t)))
|
||
|
||
;;;###autoload
|
||
(defun buffer-face-toggle (&rest specs)
|
||
"Toggle `buffer-face-mode', using face specs SPECS.
|
||
Each argument in SPECS should be a face, i.e. either a face name
|
||
or a property list of face attributes and values. If more than
|
||
one face is listed, that specifies an aggregate face, like in a
|
||
`face' text property.
|
||
|
||
If `buffer-face-mode' is already enabled, and is currently using
|
||
the face specs SPECS, then it is disabled; if `buffer-face-mode'
|
||
is disabled, or is enabled and currently displaying some other
|
||
face, then is left enabled, but the face changed to reflect SPECS.
|
||
|
||
This function will make the variable `buffer-face-mode-face'
|
||
buffer local, and set it to SPECS."
|
||
(interactive (list buffer-face-mode-face))
|
||
(while (and (consp specs) (null (cdr specs)))
|
||
(setq specs (car specs)))
|
||
(if (or (null specs)
|
||
(and buffer-face-mode (equal buffer-face-mode-face specs)))
|
||
(buffer-face-mode 0)
|
||
(setq-local buffer-face-mode-face specs)
|
||
(buffer-face-mode t)))
|
||
|
||
(defun buffer-face-mode-invoke (specs arg &optional interactive)
|
||
"Enable or disable `buffer-face-mode' using face specs SPECS.
|
||
ARG controls whether the mode is enabled or disabled, and is
|
||
interpreted in the usual manner for minor-mode commands.
|
||
|
||
SPECS can be any value suitable for a `face' text property,
|
||
including a face name, a plist of face attributes and values,
|
||
or a list of faces.
|
||
|
||
If INTERACTIVE is non-nil, display a message describing the
|
||
result.
|
||
|
||
This is a wrapper function which calls `buffer-face-set' or
|
||
`buffer-face-toggle' (depending on ARG), and prints a status
|
||
message in the echo area. In many cases one of those functions
|
||
may be more appropriate."
|
||
(let ((last-message (current-message)))
|
||
(if (or (eq arg 'toggle) (not arg))
|
||
(buffer-face-toggle specs)
|
||
(buffer-face-set (and (> (prefix-numeric-value arg) 0) specs)))
|
||
(when interactive
|
||
(unless (and (current-message)
|
||
(not (equal last-message (current-message))))
|
||
(message "Buffer-Face mode %sabled"
|
||
(if buffer-face-mode "en" "dis"))))))
|
||
|
||
|
||
;; ----------------------------------------------------------------
|
||
;; variable-pitch-mode
|
||
|
||
;;;###autoload
|
||
(defun variable-pitch-mode (&optional arg)
|
||
"Variable-pitch default-face mode.
|
||
An interface to `buffer-face-mode' which uses the `variable-pitch' face.
|
||
Besides the choice of face, it is the same as `buffer-face-mode'."
|
||
(interactive (list (or current-prefix-arg 'toggle)))
|
||
(buffer-face-mode-invoke 'variable-pitch (or arg t)
|
||
(called-interactively-p 'interactive)))
|
||
|
||
|
||
(provide 'face-remap)
|
||
|
||
;;; face-remap.el ends here
|