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177 lines
5.8 KiB
177 lines
5.8 KiB
;;; helm-font --- Font and ucs selection for Helm -*- lexical-binding: t -*-
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;; Copyright (C) 2012 ~ 2014 Thierry Volpiatto <thierry.volpiatto@gmail.com>
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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 3 of the License, or
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;; (at your option) 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. If not, see <http://www.gnu.org/licenses/>.
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;;; Code:
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(require 'cl-lib)
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(require 'helm)
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(defvar helm-ucs-map
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(let ((map (make-sparse-keymap)))
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(set-keymap-parent map helm-map)
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(define-key map (kbd "<C-backspace>") 'helm-ucs-persistent-delete)
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(define-key map (kbd "<C-left>") 'helm-ucs-persistent-backward)
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(define-key map (kbd "<C-right>") 'helm-ucs-persistent-forward)
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(define-key map (kbd "<C-return>") 'helm-ucs-persistent-insert)
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(define-key map (kbd "C-c ?") 'helm-ucs-help)
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map)
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"Keymap for `helm-ucs'.")
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;;; Xfont selection
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;;
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;;
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(defun helm-persistent-xfont-action (elm)
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"Show current font temporarily"
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(let ((current-font (cdr (assoc 'font (frame-parameters))))
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(default-font elm))
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(unwind-protect
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(progn (set-frame-font default-font 'keep-size) (sit-for 2))
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(set-frame-font current-font))))
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(defvar helm-xfonts-cache nil)
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(defvar helm-source-xfonts
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'((name . "X Fonts")
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(init . (lambda ()
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(unless helm-xfonts-cache
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(setq helm-xfonts-cache
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(x-list-fonts "*")))))
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(candidates . helm-xfonts-cache)
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(action . (("Copy to kill ring" . (lambda (elm)
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(kill-new elm)))
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("Set Font" . (lambda (elm)
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(kill-new elm)
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(set-frame-font elm 'keep-size)
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(message "New font have been copied to kill ring")))))
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(persistent-action . helm-persistent-xfont-action)
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(persistent-help . "Switch to this font temporarily")))
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;;; 𝕌𝕔𝕤 𝕊𝕪𝕞𝕓𝕠𝕝 𝕔𝕠𝕞𝕡𝕝𝕖𝕥𝕚𝕠𝕟
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;;
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;;
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(defvar helm-ucs-max-len 0)
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(defun helm-calculate-ucs-max-len ()
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"Calculate the length of longest `ucs-names' candidate."
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(cl-loop with count = 0
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for (n . v) in (ucs-names)
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for len = (length n)
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if (> len count)
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do (setq count len)
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finally return count))
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(defun helm-ucs-init ()
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"Initialize an helm buffer with ucs symbols.
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Only math* symbols are collected."
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(unless (> helm-ucs-max-len 0)
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(setq helm-ucs-max-len
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(helm-calculate-ucs-max-len)))
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(with-current-buffer (helm-candidate-buffer
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(get-buffer-create "*helm ucs*"))
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;; `ucs-names' fn will not run again, data is cached in
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;; var `ucs-names'.
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(cl-loop for (n . v) in (ucs-names)
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for len = (length n)
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for diff = (+ (- helm-ucs-max-len len) 2)
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unless (string= "" n)
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do (progn (insert (concat
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n ":"
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(make-string
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diff ? )))
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(if (fboundp 'ucs-insert)
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(ucs-insert v)
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;; call `insert-char' with nil nil
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;; to shutup byte compiler in 24.1.
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(insert-char v nil nil))
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(insert "\n")))))
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(defun helm-ucs-forward-char (_candidate)
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(with-helm-current-buffer
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(forward-char 1)))
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(defun helm-ucs-backward-char (_candidate)
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(with-helm-current-buffer
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(forward-char -1)))
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(defun helm-ucs-delete-backward (_candidate)
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(with-helm-current-buffer
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(delete-char -1)))
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(defun helm-ucs-insert-char (candidate)
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(with-helm-current-buffer
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(insert
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(replace-regexp-in-string
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" " ""
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(cadr (split-string candidate ":"))))))
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(defun helm-ucs-persistent-insert ()
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(interactive)
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(with-helm-alive-p
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(helm-attrset 'action-insert 'helm-ucs-insert-char)
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(helm-execute-persistent-action 'action-insert)))
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(defun helm-ucs-persistent-forward ()
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(interactive)
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(with-helm-alive-p
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(helm-attrset 'action-forward 'helm-ucs-forward-char)
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(helm-execute-persistent-action 'action-forward)))
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(defun helm-ucs-persistent-backward ()
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(interactive)
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(with-helm-alive-p
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(helm-attrset 'action-back 'helm-ucs-backward-char)
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(helm-execute-persistent-action 'action-back)))
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(defun helm-ucs-persistent-delete ()
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(interactive)
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(with-helm-alive-p
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(helm-attrset 'action-delete 'helm-ucs-delete-backward)
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(helm-execute-persistent-action 'action-delete)))
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(defvar helm-source-ucs
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'((name . "Ucs names")
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(init . helm-ucs-init)
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(candidate-number-limit . 9999)
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(candidates-in-buffer)
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(mode-line . helm-ucs-mode-line-string)
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(action . (("Insert" . helm-ucs-insert-char)
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("Forward char" . helm-ucs-forward-char)
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("Backward char" . helm-ucs-backward-char)
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("Delete char backward" . helm-ucs-delete-backward))))
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"Source for collecting `ucs-names' math symbols.")
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;;;###autoload
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(defun helm-select-xfont ()
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"Preconfigured `helm' to select Xfont."
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(interactive)
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(helm-other-buffer 'helm-source-xfonts "*helm select* xfont"))
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;;;###autoload
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(defun helm-ucs ()
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"Preconfigured helm for `ucs-names' math symbols."
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(interactive)
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(helm :sources 'helm-source-ucs
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:keymap helm-ucs-map))
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(provide 'helm-font)
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;; Local Variables:
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;; byte-compile-warnings: (not cl-functions obsolete)
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;; coding: utf-8
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;; indent-tabs-mode: nil
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;; End:
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;;; helm-font.el ends here
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