497 lines
22 KiB
EmacsLisp
497 lines
22 KiB
EmacsLisp
;;; space-doc.el --- Spacemacs org minor mode. -*- lexical-binding: t -*-
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;;
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;; Copyright (c) 2012-2018 Sylvain Benner & Contributors
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;;
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;; Author: Sylvain Benner <sylvain.benner@gmail.com>
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;; URL: https://github.com/syl20bnr/spacemacs
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;;
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;; This file is not part of GNU Emacs.
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;;
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;; Description:
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;; This package provides:
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;; - `space-doc-mode' - buffer local minor mode
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;; for viewing the Spacemacs documentation files.
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;; The mode hides org meta tags to improve readability.
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;; - `org-mode' link-type "https" that opens the local
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;; copies of the Spacemacs documentation files with
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;; `spacemacs/view-org-file' and supports GitHub style
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;; heading links.
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;;
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;; For example, the link:
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;; https://github.com/syl20bnr/spacemacs/blob/develop/layers/org/README.org#lnk
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;; Will be handled similary to as if it was:
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;; file:~/.emacs.d/layers/org/README.org::*links
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;; Also the `space-doc' mode will be applied.
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;;; License: GPLv3
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;;; Code:
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(require 'face-remap)
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(require 'org)
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(require 'org-compat)
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(require 'centered-buffer-mode)
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(defgroup space-doc nil "Minor mode for viewing Spacemacs documentation files."
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:group 'convenience)
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;; NOTE: Dont forget to update Spacemacs FAQ if you modify this list!
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(defcustom spacemacs-space-doc-modificators
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'(org-indent-mode
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view-mode
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hide-line-numbers
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alternative-emphasis
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alternative-tags-look
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link-protocol
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org-block-line-face-remap
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org-kbd-face-remap
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resize-inline-images)
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"List of `space-doc' modificators."
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:type '(set (const center-buffer-mode)
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(const org-indent-mode)
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(const view-mode)
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(const hide-line-numbers)
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(const alternative-emphasis)
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(const alternative-tags-look)
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(const link-protocol)
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(const org-bl-face-remap)
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(const org-kbd-face-remap)
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(const resize-inline-images))
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:group 'space-doc)
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(defvar spacemacs-space-doc-modificators-functions
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'((center-buffer-mode . spacemacs//space-doc-center-buffer-mode)
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(org-indent-mode . spacemacs//space-doc-org-indent-mode)
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(view-mode . spacemacs//space-doc-view-mode)
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(hide-line-numbers . spacemacs//space-doc-hide-line-numbers)
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(alternative-emphasis . spacemacs//space-doc-alternative-emphasis)
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(alternative-tags-look . spacemacs//space-doc-alternative-tags-look)
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(link-protocol . spacemacs//space-doc-link-protocol)
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(org-block-line-face-remap . spacemacs//space-doc-org-bl-face-remap)
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(org-kbd-face-remap . spacemacs//space-doc-org-kbd-face-remap)
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(resize-inline-images . spacemacs//space-doc-resize-inline-images))
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"alist of `space-doc' modificator (tag . function) for `org-mode' buffers.
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The functions work with a current buffer and accept ENABLE(flag) argument.
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If the argument has non-nil value - enable the modifications introduced
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by the function. Otherwise - disable. The tags used in
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`spacemacs-space-doc-modificators'")
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(define-minor-mode space-doc-mode
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"Buffer local minor mode for viewing Spacemacs documentation files.
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This mode:
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- hides `org-mode' meta tags like #+TITLE: while
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keeping their content visible.
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- Improves emphasized region apparence.
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- enables buffer local link opening with `spacemacs//space-doc-open'.
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=================================================
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= THE MODE IS CUSTOMIZABLE - read Spacemacs FAQ =
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================================================="
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:init-value nil
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:lighter " SD"
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:group 'space-doc
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(spacemacs//space-doc-centered-buffer-mode-goto-origin space-doc-mode)
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(if (derived-mode-p 'org-mode)
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(let ((inhibit-read-only t))
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(spacemacs//space-doc-set-cache +1)
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(dolist (modificator spacemacs-space-doc-modificators-functions)
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(when (member (car modificator)
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spacemacs-space-doc-modificators)
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(funcall (cdr modificator) space-doc-mode))))
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;; Force `org-mode' to replace font text properties with the default ones.
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(unless space-doc-mode (org-font-lock-ensure))
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(message (format "space-doc-mode error:%s isn't an org-mode buffer"
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(buffer-name)))
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(setq space-doc-mode nil)))
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(defcustom spacemacs-space-doc-center-buffer-mode-min-aspect-ratio
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1.7
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"Minimal `frame' aspect ration (`frame-pixel-width' divided by
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`frame-pixel-height') for `spacemacs-centered-buffer-mode'
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to be automatically enabled.
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NOTE: If `center-buffer-mode' isn't a member of
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`spacemacs-space-doc-modificators' list `spacemacs-centered-buffer-mode'
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will not be enabled."
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:type 'number
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:group 'space-doc)
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(defvar-local spacemacs--space-doc-org-kbd-face-remap-cookie nil
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"Cookie for org-kbd-face remapping.")
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(defvar-local spacemacs--space-doc-org-block-begin-line-face-remap-cookie nil
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"Cookie for org-block-begin-line-face remapping.")
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(defvar-local spacemacs--space-doc-org-block-end-line-face-remap-cookie nil
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"Cookie for org-block-end-line-face ")
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(defun spacemacs//space-doc-centered-buffer-mode-goto-origin (flag)
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"Switch to the origin buffer if `spacemacs-centere-buffer-mode' is)
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enabled. Set the value of `space-doc-mode' variable in the origin
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buffer to FLAG."
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(when spacemacs-centered-buffer-mode
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(let ((old-flag flag))
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(spacemacs-centered-buffer-mode -1)
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(setq space-doc-mode old-flag))))
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(defun spacemacs//space-doc-center-buffer-mode (&optional flag)
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"Enable `spacemacs-centered-buffer-mode' if flag is non nil,
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disable it otherwise.
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This functions is aimed to be used with `spacemacs-space-doc-modificators'."
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(when (and flag
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(not spacemacs-centered-buffer-mode)
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(>= (/ (* (frame-pixel-width) 1.0) (frame-pixel-height))
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spacemacs-space-doc-center-buffer-mode-min-aspect-ratio))
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;; It has to be run when the `window-body-width' is properly calculated.
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(run-with-idle-timer 0 nil 'spacemacs-centered-buffer-mode))
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(spacemacs-centered-buffer-mode -1))
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(defun spacemacs//space-doc-org-indent-mode (&optional flag)
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"Enable `org-indent-mode' if flag is non nil, disable it otherwise.
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This functions is aimed to be used with `spacemacs-space-doc-modificators'."
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(org-indent-mode (if flag 1 -1)))
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(defun spacemacs//space-doc-view-mode (&optional flag)
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"Enable `view-mode' if flag is non nil, disable it otherwise.
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This functions is aimed to be used with `spacemacs-space-doc-modificators'."
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(view-mode (if flag 1 -1)))
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(cl-defstruct spacemacs--space-doc-cache-struct
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marker-face
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btn-marker-face
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kbd-marker)
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(defvar-local spacemacs--space-doc-cache nil
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"Global variable of struct `spacemacs-space-doc-cache-struct'.
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It is set by `spacemacs//space-doc-set-cache'.")
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(defun spacemacs//space-doc-set-cache (&optional flag)
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"Set `spacemacs--space-doc-cache'.
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This functions is aimed to be used with `spacemacs-space-doc-modificators'."
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(setq spacemacs--space-doc-cache
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(if flag
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(let* ((kbd-bg (or (face-background 'org-kbd)
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(face-background 'region)
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'unspecified))
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(table-bg (or (face-background 'org-table)
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(face-background 'default)
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'unspecified))
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(marker-face
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`(:inherit org-table
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:foreground ,table-bg))
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(btn-marker-face
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`(:inherit org-kbd
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:distant-foreground ,kbd-bg
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:foreground ,kbd-bg))
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(kbd-marker
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(dolist (el org-emphasis-alist)
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(when (member 'org-kbd el)
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(return (car el))))))
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(make-spacemacs--space-doc-cache-struct
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:marker-face marker-face
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:btn-marker-face btn-marker-face
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:kbd-marker kbd-marker)))))
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(defun spacemacs//space-doc-hide-line-numbers (&optional enable)
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"If ENABLE is non-nil then toggle off the line numbers.
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This functions is aimed to be used with `spacemacs-space-doc-modificators'."
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(if enable
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(spacemacs/toggle-line-numbers-off)
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(when dotspacemacs-line-numbers
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(spacemacs/toggle-line-numbers-on))))
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(defun spacemacs//space-doc-org-do-emphasis-faces-advice (found)
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"If FOUND has non-nil value then modify emphasized regions
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appearances in the current buffer. The function uses
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`match-data' set by `org-do-emphasis-faces' function."
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;; `org-do-emphasis-faces' returns non-nil value when it
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;; found a region to emphasize.
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(when (and space-doc-mode
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found
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(not (and
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(match-string 4)
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(string-empty-p
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(replace-regexp-in-string "\\*+"
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""
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(match-string 4))))))
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(spacemacs//space-doc-emphasis-region
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(match-beginning 2)
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(match-end 2)))
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found)
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(defun spacemacs//space-doc-advice-org-do-emphasis-faces (&optional enable)
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"Advise org-do-emphasis-faces.
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If ENABLE is non-nil, add advice `org-do-emphasis-faces' function with
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`spacemacs//space-doc-org-do-emphasis-faces-advice'.
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NOTE: `org-do-emphasis-faces' is lazy and will emphasize only part of the
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current buffer so piggybacking it should be pretty performant solution."
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(when enable
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(advice-add 'org-do-emphasis-faces
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:after
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#'spacemacs//space-doc-org-do-emphasis-faces-advice)))
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(defsubst spacemacs//space-doc-add-region-edge-text-property
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(begin end property &optional face)
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"Add text PROPERTY to the first and last character of the BEGIN END
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text region with `add-text-properties' or if FACE has non-nil value
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`add-face-text-property'."
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(let ((edge-sub-regs (list (list (1+ begin) begin)
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(list (1- end) end))))
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(dolist (edge-sub-reg edge-sub-regs)
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(funcall (if face
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'add-face-text-property
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'add-text-properties)
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(car edge-sub-reg)
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(cadr edge-sub-reg)
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property))))
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(defun spacemacs//space-doc-emphasis-region (begin end)
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"Emphasis region based on its leading character.
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The character should be one of the markers from `org-emphasis-alist'."
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(let ((kbd-face (spacemacs--space-doc-cache-struct-btn-marker-face
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spacemacs--space-doc-cache))
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(marker-face (spacemacs--space-doc-cache-struct-marker-face
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spacemacs--space-doc-cache))
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(begin (or begin (point-min)))
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(end (or end (point-max))))
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(if (string= (buffer-substring-no-properties begin
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(1+ begin))
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(spacemacs--space-doc-cache-struct-kbd-marker
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spacemacs--space-doc-cache))
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(spacemacs//space-doc-add-region-edge-text-property begin
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end
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kbd-face
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t)
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(if (save-excursion
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(goto-char begin)
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(beginning-of-line)
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(looking-at-p org-table-any-line-regexp))
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;; If inside table.
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(spacemacs//space-doc-add-region-edge-text-property begin
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end
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marker-face
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t)
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(spacemacs//space-doc-add-region-edge-text-property
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begin
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end
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'(invisible spacemacs--space-doc-invisible-marker))))))
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(byte-compile 'spacemacs//space-doc-emphasis-region)
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(defun spacemacs//space-doc-alternative-emphasis (&optional enable)
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"Emphasis overlays.
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If ENABLE is non-nil, change the look of regions which have already
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been emphasized by `org-do-emphasis-faces' in the current buffer.
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Otherwise revert to the normal look.
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This functions is aimed to be used with `spacemacs-space-doc-modificators'."
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(if enable
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(progn
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(make-local-variable 'org-emphasis-regexp-components)
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(setcar (nthcdr 2 org-emphasis-regexp-components)
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" \t\n")
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(org-set-emph-re 'org-emphasis-regexp-components
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org-emphasis-regexp-components)
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(setq-local org-emphasis-alist '(("*" bold)
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("/" italic)
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("_" underline)
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("=" org-verbatim verbatim)
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("~" org-kbd)
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("+" (:strike-through t))))
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(spacemacs//space-doc-advice-org-do-emphasis-faces enable)
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(add-to-invisibility-spec 'spacemacs--space-doc-invisible-marker)
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(dolist (emphasized-region
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(spacemacs//space-doc-find-regions-by-text-property
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'org-emphasis t))
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(spacemacs//space-doc-emphasis-region
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(car emphasized-region)
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(cadr emphasized-region))))
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(kill-local-variable 'org-emphasis-alist)
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(kill-local-variable 'org-emphasis-regexp-components)
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(remove-from-invisibility-spec 'spacemacs--space-doc-invisible-marker))
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(spacemacs//space-doc-set-cache +1))
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(defun spacemacs//space-doc-org-kbd-face-remap (&optional enable)
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"Remove boxes from key bindings.
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If ENABLE is non-nil, removes boxes from the `org-kbd'face in the current
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`org-mode' buffer.
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Otherwise, reverts them to default.
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This functions is aimed to be used with `spacemacs-space-doc-modificators'."
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(if enable
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(setq spacemacs--space-doc-org-kbd-face-remap-cookie
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(face-remap-add-relative 'org-kbd
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`(:box nil)))
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(when (bound-and-true-p spacemacs--space-doc-org-kbd-face-remap-cookie)
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(face-remap-remove-relative
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spacemacs--space-doc-org-kbd-face-remap-cookie))))
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(defun spacemacs//space-doc-resize-inline-images (&optional enable)
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"Resize inline images.
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If ENABLE is non nil then resize inline images.
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This functions is aimed to be used with `spacemacs-space-doc-modificators'."
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;; resizing is always performed even when the image is smaller
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;; so we don't resize in README.org buffers for now
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(let ((org-image-actual-width
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(and enable
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(not (string-match-p ".*README.org\\'" (buffer-file-name)))
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600)))
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(org-display-inline-images)))
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(defsubst spacemacs//space-doc-tags-fontify (startish endish)
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"Fontify `org-mode' tags in the fuzzy region that starts
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before STARTISH and end after ENDISH."
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;; TODO add more types of tags or meta-line if needed.
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(let ((invisible-org-meta-tags-list
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`(;; Hide TITLE tag.
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"\\([ \t]*\\#\\+TITLE\\:\[ \t]*\\)"
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;; Hide CAPTION logo meta line.
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"\\(\n.*\\#\\+CAPTION\\:.*\\)"
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;; Hide PROPERTIES lines.
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"\\(\n.*\\:PROPERTIES\\:.*\\)"
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"\\(\n.*\\:CUSTOM_ID\\:.*\\)"
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"\\(\n.*\\:END\\:.*\\)"
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;; Hide TOC-ORG tag and spaces before it.
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;; Use modified `toc-org-toc-org-regexp' because
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;; the original one matches whole string.
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,(concat "\\([ \t]*:toc\\([@_][0-9]\\|\\([@_][0-9]"
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"[@_][a-zA-Z]+\\)\\)?:\\($\\|[^ ]*:$\\)\\)")
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;; Hide empty line before #+BEGIN_SRC tag if
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;; background color of the `org-block-begin-line'
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;; face is unspecified.
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,(unless (face-background 'org-block-begin-line)
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"\n\\(\n\\)[ \t]*\\#\\+begin_src.*$")
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;; Hide empty line after #+END_SRC tag if
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;; background color of the `org-block-end-line'
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;; face is unspecified and the next line isn't
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;;an org headline.
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,(unless (face-background 'org-block-end-line)
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"^[ \t]*\\#\\+end_src.*\n\\(\n\\)[^\\*]")))
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(start (save-excursion (goto-char (or startish
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(point-min)))
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(point-at-bol -2)))
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(end (save-excursion (goto-char (or endish
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(point-max)))
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(point-at-eol 2))))
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;; Remove nils.
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(setq invisible-org-meta-tags-list
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(remove nil invisible-org-meta-tags-list))
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;; Make `org-mode' meta tags invisible.
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(dolist (tag invisible-org-meta-tags-list)
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(save-excursion
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(goto-char start)
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(while (re-search-forward tag end t)
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(add-text-properties
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(match-beginning 1)
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(match-end 1)
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(list 'invisible
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'spacemacs--space-doc-invisible-marker)))))))
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(defun spacemacs//space-doc-font-lock-fontify-region-function
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(start end &optional verbose)
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"Wrapper around `font-lock-default-fontify-region' function for
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the buffer local value of `font-lock-fontify-region-function'.
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Makes sure that `font-lock-default-fontify-region' text property
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persist after `org-mode' shenanigans.
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NOTE: Not using `advice-add' because it is global modification.
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FIXME: Find cleaner solution."
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(font-lock-default-fontify-region start end verbose)
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(spacemacs//space-doc-tags-fontify start end))
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(byte-compile 'spacemacs//space-doc-font-lock-fontify-region-function)
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(defun spacemacs//space-doc-alternative-tags-look (&optional enable)
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"Modify meta tag appearance.
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If ENABLE is non-nil, modify `org-mode' meta tags appearance in the current
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buffer.
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This functions is aimed to be used with `spacemacs-space-doc-modificators'."
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(if enable
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(setq-local font-lock-fontify-region-function
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'spacemacs//space-doc-font-lock-fontify-region-function)
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(kill-local-variable 'font-lock-fontify-region-function)))
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(defun spacemacs//space-doc-org-bl-face-remap (&optional enable)
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"Hide drawers.
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If ENABLE is non-nil, hide text of the code block meta lines in the current
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buffer. If the blocks have background color text won't be masked because it
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makes them look ugly with some themes.
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If ENABLE has nil, revert to the default.
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This functions is aimed to be used with `spacemacs-space-doc-modificators'."
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(if enable
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(let* ((default-bg (or (face-background 'default)
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'unspecified))
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(org-bb-bg (or (face-background 'org-block-begin-line)
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(face-background 'org-meta-line)))
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(hide-bb-text-face `(:inherit org-block-begin-line
|
|
:foreground ,default-bg
|
|
:distant-foreground ,default-bg))
|
|
(org-bn-bg (or (face-background 'org-block-end-line)
|
|
(face-background 'org-meta-line)))
|
|
(hide-bn-text-face `(:inherit org-block-end-line
|
|
:foreground ,default-bg
|
|
:distant-foreground ,default-bg)))
|
|
(unless org-bb-bg
|
|
(setq spacemacs--space-doc-org-block-begin-line-face-remap-cookie
|
|
(face-remap-add-relative 'org-block-begin-line
|
|
hide-bb-text-face)))
|
|
(unless org-bn-bg
|
|
(setq spacemacs--space-doc-org-block-end-line-face-remap-cookie
|
|
(face-remap-add-relative 'org-block-end-line
|
|
hide-bn-text-face))))
|
|
(when (bound-and-true-p
|
|
spacemacs--space-doc-org-block-begin-line-face-remap-cookie)
|
|
(face-remap-remove-relative
|
|
spacemacs--space-doc-org-block-begin-line-face-remap-cookie))
|
|
(when (bound-and-true-p
|
|
spacemacs--space-doc-org-block-end-line-face-remap-cookie)
|
|
(face-remap-remove-relative
|
|
spacemacs--space-doc-org-block-end-line-face-remap-cookie))))
|
|
|
|
(defun spacemacs//space-doc-link-protocol (&optional enable)
|
|
"Open HTTPS links in the current buffer.
|
|
If ENABLE is non-nil, use `spacemacs//space-doc-open' to open HTTPS links
|
|
in the current `org-mode' buffer.
|
|
Otherwise open them in the browser (default behavior).
|
|
This functions is aimed to be used with `spacemacs-space-doc-modificators'."
|
|
(if enable
|
|
(progn
|
|
;; Make `space-doc' https link opener buffer local
|
|
;; and enable it only when `space-doc' mode is enabled.
|
|
(make-local-variable 'org-link-types)
|
|
(make-local-variable 'org-link-protocols)
|
|
(org-link-set-parameters "https"
|
|
:follow #'spacemacs//space-doc-open))
|
|
(kill-local-variable 'org-link-types)
|
|
(kill-local-variable 'org-link-protocols)))
|
|
|
|
(defun spacemacs//space-doc-open (path)
|
|
"Open PATH link.
|
|
If PATH argument is a link to an .org file that is located in the Spacemacs
|
|
GitHub repository then visit the local copy of the file with
|
|
`spacemacs/view-org-file'.
|
|
Open all other links with `browse-url'."
|
|
(let ((git-url-root-regexp
|
|
(concat "\\/\\/github\\.com\\/syl20bnr\\/spacemacs\\/blob"
|
|
"\\/[^/]+\\/\\(.*\\.org\\)\\(\\#.*\\)?")))
|
|
(if (string-match git-url-root-regexp path)
|
|
(spacemacs/view-org-file (concat spacemacs-start-directory
|
|
(match-string 1 path))
|
|
(or (match-string 2 path)
|
|
"^")
|
|
'subtree)
|
|
(browse-url (concat "https:" path)))))
|
|
|
|
(defun spacemacs//space-doc-find-regions-by-text-property
|
|
(property value &optional start end)
|
|
"Return a list of pairs (region-beginning region-end) in
|
|
the current buffer. If START or END has non-nil value - use them as
|
|
boundaries.
|
|
NOTE: It can find only fontified regions."
|
|
(let ((p-min (or start (point-min)))
|
|
(p-max (or end (point-max)))
|
|
(r-end nil)
|
|
(ret (list)))
|
|
(while (not (= p-min p-max))
|
|
(setq p-min (or (text-property-any p-min p-max property value)
|
|
(point-max))
|
|
r-end (or (text-property-not-all p-min p-max property value)
|
|
(point-max))
|
|
ret (append ret (unless (= p-min r-end)
|
|
(list(list p-min r-end))))
|
|
p-min r-end))
|
|
ret))
|
|
|
|
(provide 'space-doc)
|
|
;;; space-doc.el ends here.
|