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f904c0f9 | 1 | ;;; dynamic-setting.el --- Support dynamic changes |
637fa988 | 2 | |
ba318903 | 3 | ;; Copyright (C) 2009-2014 Free Software Foundation, Inc. |
637fa988 JD |
4 | |
5 | ;; Author: Jan Djärv <jan.h.d@swipnet.se> | |
6 | ;; Maintainer: FSF | |
f904c0f9 | 7 | ;; Keywords: font, system-font, tool-bar-style |
bd78fa1d | 8 | ;; Package: emacs |
637fa988 JD |
9 | |
10 | ;; This file is part of GNU Emacs. | |
11 | ||
12 | ;; GNU Emacs is free software: you can redistribute it and/or modify | |
13 | ;; it under the terms of the GNU General Public License as published by | |
14 | ;; the Free Software Foundation, either version 3 of the License, or | |
15 | ;; (at your option) any later version. | |
16 | ||
17 | ;; GNU Emacs is distributed in the hope that it will be useful, | |
18 | ;; but WITHOUT ANY WARRANTY; without even the implied warranty of | |
19 | ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
20 | ;; GNU General Public License for more details. | |
21 | ||
22 | ;; You should have received a copy of the GNU General Public License | |
23 | ;; along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>. | |
24 | ||
25 | ;;; Commentary: | |
26 | ||
27 | ;; This file provides the lisp part of the GConf and XSetting code in | |
28 | ;; xsetting.c. But it is nothing that prevents it from being used by | |
29 | ;; other configuration schemes. | |
30 | ||
31 | ;;; Code: | |
32 | ||
33 | ;;; Customizable variables | |
34 | ||
637fa988 JD |
35 | (declare-function font-get-system-font "xsettings.c" ()) |
36 | ||
e0620570 JB |
37 | (defvar font-use-system-font) |
38 | ||
637fa988 JD |
39 | (defun font-setting-change-default-font (display-or-frame set-font) |
40 | "Change font and/or font settings for frames on display DISPLAY-OR-FRAME. | |
41 | If DISPLAY-OR-FRAME is a frame, the display is the one for that frame. | |
42 | ||
e0620570 | 43 | If SET-FONT is non-nil, change the font for frames. Otherwise re-apply the |
637fa988 | 44 | current form for the frame (i.e. hinting or somesuch changed)." |
e0620570 | 45 | (let ((new-font (and (fboundp 'font-get-system-font) |
9f562668 CY |
46 | (font-get-system-font))) |
47 | (frame-list (frames-on-display-list display-or-frame))) | |
48 | (when (and new-font (display-graphic-p display-or-frame)) | |
637fa988 | 49 | (clear-font-cache) |
9f562668 CY |
50 | (if set-font |
51 | ;; Set the font on all current and future frames, as though | |
52 | ;; the `default' face had been "set for this session": | |
53 | (set-frame-font new-font nil frame-list) | |
54 | ;; Just redraw the existing fonts on all frames: | |
55 | (dolist (f frame-list) | |
56 | (let ((frame-font | |
57 | (or (font-get (face-attribute 'default :font f 'default) | |
58 | :user-spec) | |
59 | (frame-parameter f 'font-parameter)))) | |
60 | (when frame-font | |
61 | (set-frame-parameter f 'font-parameter frame-font) | |
62 | (set-face-attribute 'default f | |
63 | :width 'normal | |
64 | :weight 'normal | |
65 | :slant 'normal | |
66 | :font frame-font)))))))) | |
637fa988 | 67 | |
f904c0f9 JD |
68 | (defun dynamic-setting-handle-config-changed-event (event) |
69 | "Handle config-changed-event on the display in EVENT. | |
70 | Changes can be | |
71 | The monospace font. If `font-use-system-font' is nil, the font | |
72 | is not changed. | |
869795d6 | 73 | The normal font. |
f904c0f9 | 74 | Xft parameters, like DPI and hinting. |
869795d6 | 75 | The Gtk+ theme name. |
f904c0f9 | 76 | The tool bar style." |
637fa988 | 77 | (interactive "e") |
f904c0f9 | 78 | (let ((type (nth 1 event)) |
637fa988 | 79 | (display-name (nth 2 event))) |
f904c0f9 JD |
80 | (cond ((and (eq type 'monospace-font-name) font-use-system-font) |
81 | (font-setting-change-default-font display-name t)) | |
637fa988 | 82 | |
f904c0f9 JD |
83 | ((eq type 'font-render) |
84 | (font-setting-change-default-font display-name nil)) | |
637fa988 | 85 | |
3a46642b J |
86 | ;; This is a bit heavy, ideally we would just clear faces |
87 | ;; on the affected display, and perhaps only the relevant | |
88 | ;; faces. Oh well. | |
89 | ((eq type 'theme-name) (clear-face-cache)) | |
90 | ||
f904c0f9 JD |
91 | ((eq type 'tool-bar-style) (force-mode-line-update t))))) |
92 | ||
93 | (define-key special-event-map [config-changed-event] | |
94 | 'dynamic-setting-handle-config-changed-event) | |
964f5b2b | 95 |