commit e7461ada04bf5aef9a2e69b54416d533b50b54c8
parent 6813bd610e0a6e6a612a92399b041e2d5973e472
Author: Shimmy Xu <shimmy.xu@shimmy1996.com>
Date: Fri, 22 Jun 2018 09:24:54 -0500
Add unicode font fallback.
Diffstat:
| M | README.org | | | 43 | ++++++++++++++++++++++++++++--------------- |
1 file changed, 28 insertions(+), 15 deletions(-)
diff --git a/README.org b/README.org
@@ -102,23 +102,35 @@ It would also help to change the default command for =emacs= into:
** Font Settings
*** Default Fonts
-Specify both Latin font and CJK font.
+Specify font settings.
#+BEGIN_SRC emacs-lisp
+ (defvar user/cjk-font "Noto Sans CJK SC"
+ "Default font for CJK characters.")
+
(defvar user/latin-font "Iosevka Term"
"Default font for Latin characters.")
- (defvar user/cjk-font "Noto Sans CJK SC"
- "Default font for CJK characters.")
+ (defvar user/unicode-font "Symbola"
+ "Default font for Unicode characters, including emojis.")
(defvar user/font-size 17
"Default font size in px.")
+
+ (defvar user/standard-fontset
+ (create-fontset-from-fontset-spec standard-fontset-spec)
+ "Standard fontset for user.")
#+END_SRC
-*** CJK Font Fallback Logic
-Fallback logic for CJK fonts, ensures correct font and size gets used for CJK.
+*** CJK Font Scaling
+Ensure CJK fonts scales correctly to twice the width of mono-space half-width
+characters. I tried to add something similar for Unicode fonts, but found that
+they don't have uniform width anyways (not to mention that not all of them are
+full-width), rendering this method useless.
+
+I think CJK fonts has less granular sizing controls, i.e. the actual glyph size
+of size 16 and size 17 are in fact the same and only starts actually increasing
+after we hit size 18.
-**** CJK Font Scaling.
-Ensure CJK fonts scales correctly to twice the width of half-width characters.
#+BEGIN_SRC emacs-lisp
(defvar user/cjk-font-scale
'((16 . 1.0)
@@ -132,24 +144,25 @@ Ensure CJK fonts scales correctly to twice the width of half-width characters.
(cdr (assoc user/font-size user/cjk-font-scale)))))
#+END_SRC
-**** CJK Enabled Fontset
+*** Fontset with CJK and Unicode Fallback
To ensure fontset gets correctly configured, I simply created one from
scratch. This is because =emacsclient= seems to have a different dynamic when
creating =startup-fontset= and no other method guarantees consistent behavior
between =emacs= and =emacsclient=.
#+BEGIN_SRC emacs-lisp
- (defvar user/standard-fontset
- (create-fontset-from-fontset-spec standard-fontset-spec)
- "User fontset with cjk font fallback.")
-
- ;; Enable font customization for charset symbols.
- ;; This charset contains puncuation marks, emoji, and etc..
+ ;; Enable font customization for charset symbols. This charset contains
+ ;; puncuation marks, emoji, etc.
(setq use-default-font-for-symbols nil)
(defun user/set-font ()
- "Set Latin and CJK font for user/standard-fontset."
+ "Set Unicode, Latin and CJK font for user/standard-fontset."
+ ;; Unicode font.
+ (set-fontset-font user/standard-fontset 'unicode
+ (font-spec :family user/unicode-font)
+ nil 'prepend)
;; Latin font.
+ ;; Only specify size here to allow text-scale-adjust work on other fonts.
(set-fontset-font user/standard-fontset 'latin
(font-spec :family user/latin-font :size user/font-size)
nil 'prepend)