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gkroam.el
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gkroam.el
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;;; gkroam.el --- A lightweight org-mode Roam Research replica -*- lexical-binding: t; -*-
;; Copyright (C) 2020 Kinney Zhang
;;
;; Version: 2.4.3
;; Keywords: org, convenience
;; Author: Kinney Zhang <[email protected]>
;; URL: https://github.com/Kinneyzhang/gkroam
;; Package-Requires: ((emacs "26.3") (db "0.0.6") (company "0.9.10"))
;; This file is not part of GNU Emacs.
;; This program 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, or (at your option)
;; any later version.
;; This program 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 this program; if not, write to the Free Software
;; Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
;;; Commentary:
;; Gkroam is a lightweight Roam Research repica, built on top of Org-mode.
;;; ChangeLog:
;; v1.0 - Auto update link references at the buttom of page buffer.
;; v2.0 - Use overlay to hide and show gkroam brackets accordingly
;; and fix some bugs.
;; v2.0.1 - Fix 'hide and show brackets' problems in some main occasion.
;; Such as newline, etc.
;; v2.0.2 - Fix 'gkroam-publish-current-file' and 'gkroam-preview-current',
;; automatically convert gkroam link to org link and convert it back after
;; published (use 'undo', not reliable). But it has problem with publishing
;; the whole project.
;; v2.0.3 - Fix 'gkroam-publish-site' and 'gkroam-preview'.
;; Now you can publish and preview the whole roam site.
;; v2.0.4 - Many bugs fixed and code improvement.
;; v2.1.0 - A more powerful linked references system.
;; v2.1.1 - Change package name to 'gkroam' from 'gk-roam'.
;; v2.2.0 - Edit many pages in one side window and save changes separately.
;; v2.2.1 - Many bug fixed and misc code optimization.
;; v2.3.0 - Implement headline references, add a new minor mode
;; 'gkroam-dynamic-brackets-mode' and rename 'gkroam-edit' to `gkroam-capture'.
;; v2.3.1 - A more resonable way to insert link.
;; Press "C-p RET" or "C-M-j" to skip headline completion for ivy user
;; or just press "RET" for vanilla user.
;; v2.3.2 - Beautify page: unify org list bullet and beautify org checkbox.
;; Better to turn it off when editing the page.
;; v2.3.3 - Make page filename customizable, delete index file
;; and show index in buffer.
;; v2.3.4 - Delete 'gkroam-dynamic-brackets-mode'
;; and add `gkroam-toggle-dynamic' function.
;; v2.3.5 - Optimize gkroam page prettification, change 'gkroam-toggle-beautify'
;; to `gkroam-toggle-prettify' for precise semanteme.
;; v2.3.6 - Implement a perfect linked references workflow.
;; When a link is the item of org plain list, the whole list structure will be shown.
;; v2.3.7 - Add headline id only when you insert a gkroam link.
;; Use `gkroam-rebuild-caches' command to rebuild headline and id caches.
;; v2.4.0
;; 1. Delete =gkroam-toggle-dynamic= command
;; 2. Set gkroam-mode as a minor mode, instead of a major mode derived from org-mode
;; 3. Use text properties to render gkroam links.
;; 4. More caches and a big improvement in performance.
;; 4.1 Cache gkroam pages and their filenames.
;; 4.2 Cache gkroam pages and their references.
;; 5. Prettify and enhance linked references
;; 5.1 Change backlink format to "{{page::line-number}{alias}}"
;; 5.2 Show list item's parent items above it and shadow them.
;; 5.3 Highlight each reference region.
;; 5.4 Jump back to the specific line when click backlink.
;; v2.4.1
;; 1. Implement a roam research like index buffer.
;; 2. Add new command `gkroam-delete'.
;; 3. Rename 'gkroam-smart-new' to `gkroam-dwim'.
;; v2.4.2 - Implement 'unlinked references'.
;; Use command `gkroam-show-unlinked' to show pages' unlinked references in a side window.
;; Click link in unlinked references to link it to reference.
;; v2.4.3 - Change backlink format to org-link format and delete 'gkroam-capture'.
;;; Code:
(require 'cl-lib)
(require 'org)
(require 'org-id)
(require 'org-element)
(require 'db)
(require 'company)
(require 'calendar)
(eval-when-compile
(require 'subr-x)
(require 'hl-line)
(require 'crm))
;;;; Declarations
(defvar org-link-frame-setup)
(defvar ivy-use-selectable-prompt)
;;;; Variables
(defgroup gkroam nil
"A roam replica on top of emacs org-mode."
:tag "gkroam"
:group 'org)
(defcustom gkroam-root-dir "~/gkroam/org/"
"Gkroam's root directory, with org files in it."
:type '(choice directory sexp)
:group 'gkroam)
(defcustom gkroam-cache-dir (concat user-emacs-directory "gkroam/")
"Gkroam's cache directory."
:type 'directory
:group 'gkroam)
(defcustom gkroam-index-title "GKROAM"
"Title of index page."
:type 'string
:group 'gkroam)
(defcustom gkroam-window-margin 2
"Gkroam window's left and right margin, or nil to ignore margin settings."
:type '(choice (integer :tag "Number of spaces")
(const :tag "Ignore margin settings" nil))
:group 'gkroam)
(defcustom gkroam-use-default-filename nil
"Non-nil means use default filename for gkroam page.
The default format is '%Y%m%d%H%M%S' time string."
:type 'boolean
:group 'gkroam)
(defcustom gkroam-show-brackets-flag nil
"Non-nil means to show brackets in page link."
:type 'boolean
:group 'gkroam)
(defcustom gkroam-title-height 300
"Height of gkroam page title when prettifying."
:type 'integer
:group 'gkroam)
(defvar gkroam-crm-separator "[ \t]*|[ \t]*"
"Default value of `crm-separator' in gkroam.")
(defvar gkroam-link-face 'font-lock-type-face
"Face for gkroam link.")
(defvar gkroam-headline-db
(db-make
`(db-hash
:filename ,(concat gkroam-cache-dir "gkroam-headline-db")))
"Database fot caching gkroam's headline and headline id.")
(defvar gkroam-page-db
(db-make
`(db-hash
:filename ,(concat gkroam-cache-dir "gkroam-page-db")))
"Database for caching gkroam page's filename.")
(defvar gkroam-linked-reference-db
(db-make
`(db-hash
:filename ,(concat gkroam-cache-dir "gkroam-linked-reference-db")))
"Database for caching gkroam page's linked references.")
(defvar gkroam-unlinked-reference-db
(db-make
`(db-hash
:filename ,(concat gkroam-cache-dir "gkroam-unlinked-reference-db")))
"Database for caching gkroam page's unlinked references.")
(defvar gkroam-org-list-re
"^ *\\([0-9]+[).]\\|[*+-]\\) \\(\\[[ X-]\\] \\)?"
"Org list bullet and checkbox regexp.")
(defvar gkroam-checkbox-todo-icon "□"
"The todo checkbox icon.")
(defvar gkroam-checkbox-done-icon "■"
"The done checkbox icon.")
(defvar gkroam-has-link-p nil
"Judge if has link or hashtag in gkroam buffer.")
(defvar gkroam-link-regexp
(rx (seq (group "{[")
(group (+? not-newline))
(group (?? (seq (group " » ")
(group (+? not-newline)))))
(group "]")
(group (?? (seq (group "[")
(group (+? not-newline))
(group "]"))))
(group "}")))
"Regular expression that matches a gkroam link.")
(defvar gkroam-hashtag-regexp
(rx (seq (group "#")
(group "{[")
(group (+? not-newline))
(group "]}")))
"Regular expression that matches a gkroam hashtag.")
(defvar gkroam-linked-reference-delimiter-re
"^* \\([0-9]+\\) Linked References to \"\\(.+?\\)\".*"
"Delimiter string regexp to separate page contents from references region.")
(defvar gkroam-unlinked-reference-delimiter-re
"^* \\([0-9]+\\) Unlinked References to \"\\(.+?\\)\".*"
"Delimiter string regexp to separate page contents from references region.")
(defvar gkroam-backlink-regexp
"\\[\\[file:\\(.+?\\)::[0-9]+\\]\\[.+?\\]\\]"
"Regular expression that matches a gkroam backlink.")
(defvar gkroam-prettify-page-flag nil
"Non-nil means to prettify gkroam page.")
(defvar gkroam-return-wconf nil
"Current saved window configuration.")
(defvar gkroam-mentions-flag nil
"Non-nil means it's in process of gkroam mentions.")
(defvar gkroam-index-buf "*Gkroam Index*"
"Gkroam index buffer name.")
(defvar gkroam-capture-buf "*Gkroam Capture*"
"Gkroam capture buffer name.")
(defvar gkroam-linked-buf "*Gkroam Linked*"
"Gkroam linked references buffer name.")
(defvar gkroam-unlinked-buf "*Gkroam Unlinked*"
"Gkroam unlinked references buffer name.")
;;;; Functions
(defun gkroam-link-frame-setup (func)
"Alter `org-link-frame-setup' for gkroam.
Use FUNC function to open file link."
(setq org-link-frame-setup
`((vm . vm-visit-folder-other-frame)
(vm-imap . vm-visit-imap-folder-other-frame)
(gnus . org-gnus-no-new-news)
(file . ,func)
(wl . wl-other-frame))))
(defun gkroam-at-root-p ()
"Check if current file exists in `gkroam-root-dir'."
(when (buffer-file-name)
(file-equal-p (file-name-directory (buffer-file-name))
(expand-file-name gkroam-root-dir))))
(defun gkroam-at-index-buf ()
"Check if current buffer is `gkroam-index-buf'."
(string= (buffer-name) gkroam-index-buf))
(defun gkroam-at-capture-buf ()
"Check if current buffer is `gkroam-capture-buf'."
(string= (buffer-name) gkroam-capture-buf))
(defun gkroam-at-linked-buf ()
"Check if current buffer is `gkroam-linked-buf'."
(string= (buffer-name) gkroam-linked-buf))
(defun gkroam-at-unlinked-buf ()
"Check if current buffer is `gkroam-unlinked-buf'."
(string= (buffer-name) gkroam-unlinked-buf))
(defun gkroam-work-p ()
"Check if current file or buffer is where gkroam has to be in work."
(or (gkroam-at-root-p)
(gkroam-at-index-buf)
(gkroam-at-capture-buf)
(gkroam-at-linked-buf)
(gkroam-at-unlinked-buf)))
(defun gkroam-case-fold-string= (a b)
"Ignore case sensitive when compare A and B using `string='."
(eq t (compare-strings a nil nil b nil nil t)))
(defun gkroam-title-exist-p (title)
"Check if the case fold TITLE page exists in `gkroam-root-dir'.
Return the original title if TITLE does't equal to the original title.
Return non-nil if TITLE equals to the original title.
Return nil if TITLE doesn't exist in gkroam pages."
(let ((case-title (car (cl-member title (gkroam-retrive-all-titles)
:test #'gkroam-case-fold-string=))))
(when case-title
(when (string= title case-title)
(setq case-title t)))
case-title))
(defun gkroam-retrive-page (title)
"Retrive page's filename from database.
The page has a title named TITLE."
(gkroam-db-get gkroam-page-db title "page"))
(defun gkroam-retrive-title (page)
"Retrive page's title from database.
The page has a filename named PAGE."
(caar (db-query gkroam-page-db `(= "page" ,page))))
(defun gkroam-retrive-all-titles ()
"Retrive all gkroam pages' titles from database."
(mapcar #'car (db-query gkroam-page-db nil)))
(defun gkroam--get-file (page)
"Get gkroam file accroding to PAGE."
(expand-file-name page gkroam-root-dir))
(defun gkroam--gen-file ()
"Generate new gkroam file path."
(expand-file-name (gkroam--gen-page) gkroam-root-dir))
(defun gkroam--gen-page ()
"Generate new gkroam page filename, without directory prefix."
(let* (slug slug-format)
(if gkroam-use-default-filename
(setq slug-format (format-time-string "%Y%m%d%H%M%S"))
(setq slug (completing-read "Input filename or press \"RET\" to use the default: "
nil nil nil nil nil (format-time-string "%Y%m%d%H%M%S")))
(setq slug-format (string-join (split-string slug) "-")))
(format "%s.org" slug-format)))
(defun gkroam--format-backlink (page line-number alias)
"Format gkroam backlink for PAGE, refer to a link
in LINE-NUMBER line, display a description ALIAS."
(format "[[file:%s::%d][%s]]" page line-number alias))
(defun gkroam--narrow-to-content ()
"Narrow region to gkroam page contents if there is a reference region."
(save-excursion
(let ((content-beg (point-min)))
(goto-char (point-min))
(when (re-search-forward "\\(^ *#+.+:.+\n+\\)+" nil t)
(setq content-beg (point)))
(when (re-search-forward gkroam-linked-reference-delimiter-re nil t)
(unless (> (point-min) (1- (line-beginning-position)))
(narrow-to-region content-beg (1- (line-beginning-position))))))))
(defun gkroam--narrow-to-reference ()
"Narrow region to page references if there is a reference region."
(save-excursion
(goto-char (point-min))
(when (re-search-forward gkroam-linked-reference-delimiter-re nil t)
(narrow-to-region (line-beginning-position) (point-max)))))
(defun gkroam-new (title)
"Just create a new gkroam page titled with TITLE."
(let ((file (gkroam--gen-file)))
(with-current-buffer (find-file-noselect file t)
(insert (format "#+TITLE: %s\n\n" title))
(save-buffer))
(gkroam-cache-curr-page title)
file))
;; ----------------------------------------
;;;;; linked references
(defvar gkroam-link-re-format "{\\[%s.*?\\]}"
"Gkroam link regexp format used for searching link context.")
(defun gkroam-start-process (buf-name args)
"Start a rg process with output buffer named BUF-NAME.
ARGS are the arguments of rg process."
(let ((name (generate-new-buffer-name buf-name)))
(apply #'start-process `(,name ,name "rg" ,@args
,(expand-file-name gkroam-root-dir)))))
(defun gkroam-search-process (process callback)
"Call CALLBACK After the PROCESS finished."
(unless (executable-find "rg")
(user-error "Cannot find program 'ripgrep'"))
(let ((sentinel
(lambda (process event)
(if (string-match-p (rx (or "finished" "exited"))
event)
(if-let ((buf (process-buffer process)))
(with-current-buffer buf
(save-excursion
(funcall callback (buffer-string))))
(error "Gkroam’s rg process’ buffer is killed"))
(error "Gkroam’s rg process failed with signal: %s"
event)))))
(set-process-sentinel process sentinel)))
(defun gkroam--process-linked-backlink (string page line-number)
"Convert gkroam link to backlink in STRING.
The backlink refers to a link in LINE-NUMBER line of PAGE."
(with-temp-buffer
(insert string)
;; (goto-char (point-min))
;; (while (re-search-forward gkroam-hashtag-regexp nil t)
;; (replace-match (gkroam--format-backlink
;; page line-number
;; (concat "#" (match-string-no-properties 3)))))
(goto-char (point-min))
(while (re-search-forward gkroam-link-regexp nil t)
(let* ((title (match-string-no-properties 2))
(alias (match-string-no-properties 9))
(headline (match-string-no-properties 5)))
(if alias
(replace-match (gkroam--format-backlink page line-number alias))
(if headline
(replace-match (gkroam--format-backlink page line-number headline))
(replace-match (gkroam--format-backlink page line-number title))))))
(buffer-string)))
(defun gkroam--format-linked-reference-content ()
"Format the content of linked reference."
(save-excursion
(goto-char (line-beginning-position))
(let* ((blank-num (skip-chars-forward "[ ]"))
(elem (org-element-at-point))
(level-1-blank-num (cadr (car (org-element-property :structure elem))))
(elem-type (org-element-type elem))
(elem-start (org-element-property :begin elem))
(elem-end (org-element-property :end elem))
(elem-str (buffer-substring-no-properties elem-start elem-end))
reference-str)
(pcase elem-type
('item
(let* ((parent-strs "")
(relative-level 0)
parent parent-beg parent-str)
(catch 'break
(while (point)
(if (= blank-num level-1-blank-num)
(throw 'break nil)
(setq parent (org-element-property :parent (org-element-at-point)))
(setq parent-beg (org-element-property :begin parent))
(setq blank-num
(progn
(goto-char parent-beg)
(forward-line -1)
(skip-chars-forward "[ ]")))
(save-excursion
(goto-char (line-beginning-position))
(re-search-forward gkroam-org-list-re (line-end-position) t)
(cl-incf relative-level)
(setq parent-str
(buffer-substring-no-properties (point)
(line-end-position))))
(when (= relative-level 1)
(setq parent-strs (concat parent-str "\n" parent-strs)))
(when (> relative-level 1)
(setq parent-strs (concat parent-str " > " parent-strs))))))
(setq reference-str (concat parent-strs elem-str))))
('plain-list
(let* ((plain-lst (org-element-property :structure (org-element-at-point)))
(item (car plain-lst)))
(setq elem-start (car item))
(setq elem-end (car (last item)))
(setq reference-str (buffer-substring-no-properties elem-start elem-end))))
(_ (setq reference-str elem-str)))
reference-str)))
(defvar gkroam-file-path-re
(concat "^" (expand-file-name gkroam-root-dir) ".+\\.org")
"Regular expression to match gkroam file path.")
(defun gkroam--get-rg-output-region ()
"Split rg output to different regions according to different pages.
Each region is a list consist of '(beg-postion end-position page-name)'.
Return a list of all region lists."
(let ((beg (point-min))
(end (point))
page region-lst)
(save-excursion
(while (not (= end (point-max)))
(goto-char beg)
(save-excursion
(when (re-search-forward gkroam-file-path-re nil t)
(setq page (file-name-nondirectory
(match-string-no-properties 0)))
(setq beg (1+ (point)))))
(if (re-search-forward gkroam-file-path-re nil t 2)
(setq end (line-beginning-position))
(setq end (point-max)))
(push `(,beg ,end ,page) region-lst)
(setq beg end)))
(reverse region-lst)))
(defun gkroam--process-searched-string (type string title)
"Process the TYPE type of searched STRING by 'rg',
get the whole contents of TITLE page.
If type is 'linked', it means to process linked references.
If type is 'unlinked', it means to process unlinked references."
(if (string-empty-p string)
(cons 0 "")
(with-temp-buffer
(insert string)
(goto-char (point-min))
(let ((region-lst (gkroam--get-rg-output-region))
(num 0) references)
(dolist (region region-lst)
(let ((beg (nth 0 region))
(end (nth 1 region))
(page (nth 2 region))
(regexp-format
(pcase type
('linked gkroam-link-re-format)
('unlinked "%s")))
(context nil))
(goto-char beg)
(save-restriction
(let (bound-end
(last-headline "")
(last-content ""))
(narrow-to-region beg end)
;; 'narrow in narrow' does not succeed.
(goto-char (point-min))
(re-search-forward "\\(^ *#+.+:.+\n+\\)+" nil t)
(save-excursion
(if (re-search-forward gkroam-linked-reference-delimiter-re nil t)
(setq bound-end (match-beginning 0))
(setq bound-end (point-max))))
(while (re-search-forward
(format regexp-format (regexp-quote title))
bound-end t)
(let* ((headline "")
(line-number (line-number-at-pos))
(raw-content
(pcase type
('linked (string-trim
(gkroam--format-linked-reference-content)
nil "[ \t\n\r]+"))
('unlinked
(when-let
((unlinked-content
(gkroam--format-unlinked-reference-content)))
(string-trim unlinked-content nil "[ \t\n\r]+")))))
(content
(pcase type
('linked (gkroam--process-linked-backlink
raw-content page line-number))
('unlinked
(when raw-content
(gkroam--process-unlinked-title
title raw-content line-number))))))
(when content
(save-excursion
(when (re-search-backward "^*+ .+\n" nil t)
(setq headline
(string-trim (match-string-no-properties 0) "*+ +" nil))
(setq headline (concat "*** " headline))))
(if (string= headline last-headline)
(pcase type
('linked
(setq num (1+ num))
(setq context (concat context content "\n\n")))
('unlinked
(unless (string= last-content content)
(setq num (1+ num))
(setq context (concat context content "\n\n")))))
(setq num (1+ num))
(setq context (concat context headline "\n" content "\n\n"))
(setq last-headline headline))
;; always set current content to last-content
;; regardless of headline equal or not.
(setq last-content content))))))
(when context
(setq references
(concat references
(format "** %s\n\n%s"
(gkroam--format-backlink
page 1 (gkroam-retrive-title page))
context))))))
(if references
(setq references
(with-temp-buffer
(insert (string-trim references))
(org-mode)
(indent-region (point-min) (point-max))
(buffer-string)))
(setq references ""))
(cons num references)))))
(defun gkroam-search-page-link (title)
"Return a rg process to search a specific TITLE page's link.
Output matched files' path and context."
(gkroam-start-process " *gkroam-rg*"
`(,(format "\\{\\[%s( ».*)?\\](\\[.+?\\])?\\}"
title)
;; Write a funciton to generate rg regexp
;; format for title!
"--ignore-case" "--sortr" "path"
"-C" ,(number-to-string 9999)
"-N" "--heading"
"-g" "!index.org*")))
(defun gkroam-update-linked-references (title)
"Update gkroam TITLE page's linked reference."
(gkroam-search-process
(gkroam-search-page-link title)
(lambda (string)
(let* ((page (gkroam-retrive-page title))
(file (gkroam--get-file page))
(file-buf (find-file-noselect file t))
(processed-str (gkroam--process-searched-string
'linked string title))
(num (number-to-string (car processed-str)))
(references (cdr processed-str))
(reference-db gkroam-linked-reference-db)
(cached-references (cdar (db-get title reference-db)))
(delimiter-re gkroam-linked-reference-delimiter-re)
(delimiter-format "* %s Linked References to \"%s\"\n\n")
reference-start curr-references reference-content-start)
(unless (string= references cached-references)
(db-put title `(("reference" . ,references)) reference-db)
(setq cached-references (cdar (db-get title reference-db))))
;; compare searched references string with cached references string.
;; If not equal, cache searched one.
(with-current-buffer file-buf
(save-excursion
(goto-char (point-max))
(re-search-backward delimiter-re nil t)
(setq reference-start (point))
(forward-line 2)
(setq reference-content-start (point))
(setq curr-references
(string-trim (buffer-substring-no-properties
reference-content-start (point-max))))
;; Unindent current page's rerferences string and compare with
;; the cached ones. If they are different,
;; update current page's references.
(unless (string= curr-references cached-references)
(let ((inhibit-read-only t))
(remove-text-properties reference-start (point-max) '(read-only nil)))
(delete-region reference-start (point-max))
(unless (string-empty-p string)
(insert (format delimiter-format num title))
(insert references)
;; use overlay to hide part of reference. (filter)
;; (gkroam-overlay-region beg (point-max) 'invisible t)
(indent-region reference-content-start (point-max))
(save-buffer)
(gkroam-db-update gkroam-page-db title "mention" num)
(message "%s reference updated" page)))
(gkroam-list-parent-item-overlay reference-start)
(gkroam-reference-region-overlay reference-start)
(when gkroam-prettify-page-flag
(gkroam-org-list-fontify reference-start (point-max)))
(unless (get-text-property reference-start 'read-only)
(put-text-property reference-start (point-max)
'read-only "References region is uneditable."))))))))
;;;;; unlinked references
(defvar gkroam-unlinked-regexp
"{{\\([0-9]+\\)::\\(.+?\\)}}"
"Regular expression that matches unlinked links.")
(define-button-type 'gkroam-unlinked-link
'action #'gkroam-follow-unlinked-link
'face '(:underline t)
'line-number nil
'title nil
'follow-link t
'help-echo "Link it to reference")
(defun gkroam-follow-unlinked-link (button)
"Link the unlinked title to reference after push BUTTON."
(with-demoted-errors "Error when following the link: %s"
(let ((line-number (string-to-number
(button-get button 'line-number)))
(title (button-get button 'title)))
(gkroam-link-unlinked title line-number))))
(defun gkroam-unlinked-title-fontify (beg end)
"Highlight gkroam backlink between BEG and END."
(save-excursion
(goto-char beg)
(while (re-search-forward gkroam-unlinked-regexp end t)
(let ((line-number (match-string-no-properties 1))
(title (match-string-no-properties 2)))
(with-silent-modifications
(add-text-properties (match-beginning 0) (match-beginning 2)
'(display ""))
(add-text-properties (match-end 2) (match-end 0)
'(display ""))
(make-text-button (match-beginning 2)
(match-end 2)
:type 'gkroam-unlinked-link
'line-number line-number
'title title))))))
(defun gkroam--format-unlinked-title (line-number title)
"Format the unlinked title with LINE-NUMBER and TITLE."
(format "{{%d::%s}}" line-number title))
(defun gkroam--process-unlinked-title (title string line-number)
"Highlight unlinked TITLE in STRING,
include the original LINE-NUMBER in text property."
(with-temp-buffer
(insert string)
(goto-char (point-min))
(while (re-search-forward (regexp-quote title) nil t)
(when (gkroam--unlinked-title-valid-p)
(replace-match (gkroam--format-unlinked-title line-number title))))
(buffer-string)))
(defun gkroam--between-org-link-p ()
"Check if current point is between a org link."
(let (beg end)
(and (save-excursion
(setq beg (re-search-backward "\\[\\[" (line-beginning-position) t)))
(not (save-excursion
(re-search-backward "\\]\\]" beg t)))
(save-excursion
(setq end (re-search-forward "\\]\\]" (line-end-position) t)))
(not (save-excursion
(re-search-forward "\\[\\[" end t))))))
(defun gkroam--between-gkroam-link-p ()
"Check if current point is between a gkroam link."
(let (beg end)
(save-excursion
(and (save-excursion
(setq beg (re-search-backward "{\\[" (line-beginning-position) t)))
(not (save-excursion
(re-search-backward "\\]]" beg t)))
(save-excursion
(setq end (re-search-forward "\\]}" (line-end-position) t)))
(not (save-excursion
(re-search-forward "{\\[" end t)))))))
(defun gkroam--unlinked-title-valid-p ()
"Judge if current macth is a valid unlinked title after searching.
The following conditions should be excluded:
1. title is in a org headline.
2. title is a substring of words or phrase. (Chinese excluded)
3. title is in a gkroam link, hashtag or org link."
(save-excursion
(let* ((title (match-string-no-properties 0))
(is-ascii (equal (find-charset-string title)
'(ascii)))
valid-p)
(pcase title
;; case 1
((guard (save-excursion
(goto-char (line-beginning-position))
(looking-at "^*+ .+")))
(setq valid-p nil))
;; case 2
((and (guard is-ascii)
(guard (or (not (string= (thing-at-point 'word t) title))
(when (char-after (match-end 0))
(or (string= "-" (string (char-after (match-end 0))))
(string= "_" (string (char-after (match-end 0))))))
(when (< (+ 2 (match-end 0)) (point-max))
(string= "}}" (buffer-substring-no-properties
(match-end 0) (+ 2 (match-end 0))))))))
(setq valid-p nil))
;; case 3
((guard (or (gkroam--between-org-link-p)
(gkroam--between-gkroam-link-p)))
(setq valid-p nil))
(_ (setq valid-p t)))
valid-p)))
(defun gkroam--format-unlinked-reference-content ()
"Format the content of unlinked reference."
(when (gkroam--unlinked-title-valid-p)
(buffer-substring-no-properties (line-beginning-position)
(line-end-position))))
(defun gkroam-search-page-title (title)
"Return a rg process to search a specific PAGE's title.
Output the context including the TITLE."
(gkroam-start-process " *gkroam-unlinked-references*"
`(,title
;; Write a funciton to generate rg regexp
;; format for title!
"--ignore-case" "--sortr" "path"
"-C" ,(number-to-string 9999)
"-N" "--heading"
"-g" ,(format
"!%s"
(gkroam-retrive-page title)))))
(defun gkroam-set-unlinked-references (title)
"Set unlinked references of TITLE gkroam page to `gkroam-unlinked-buf'."
(gkroam-search-process
(gkroam-search-page-title title)
(lambda (string)
(let* ((buf (get-buffer-create gkroam-unlinked-buf))
(processed-str (gkroam--process-searched-string
'unlinked string title))
(num (number-to-string (car processed-str)))
(references (cdr processed-str))
(reference-db gkroam-unlinked-reference-db)
(cached-references (cdar (db-get title reference-db)))
(reference-title "* %s unlinked references to \"%s\"\n\n"))
(unless (string= references cached-references)
(db-put title `(("reference" . ,references)) reference-db)
(setq cached-references (cdar (db-get title reference-db))))
(with-current-buffer buf
(let ((inhibit-read-only t))
(remove-text-properties (point-min) (point-max) '(read-only nil)))
(erase-buffer)
(insert "#+TITLE: UNLINKED REFERENCES\n\n")
(if (string-empty-p references)
(progn
(org-mode)
(insert (format "* None unlinked references to \"%s\"\n" title))
(gkroam-org-title-overlay (point-min)))
(insert (format reference-title num title))
(insert cached-references)
(org-mode)
(indent-region (point-min) (point-max))
(gkroam-prettify-page)
(gkroam-unlinked-title-fontify (point-min) (point-max)))
(goto-char (point-min))
(put-text-property (point-min) (point-max)
'read-only "References region is uneditable.")
(gkroam-mentions-mode 1)))))
(let ((buf gkroam-unlinked-buf)
win-width)
(when (null gkroam-mentions-flag)
(setq gkroam-return-wconf (current-window-configuration)))
(setq gkroam-mentions-flag t)
(if (get-buffer-window buf)
(progn
(select-window (get-buffer-window buf))
(let ((inhibit-read-only t))
(remove-text-properties (point-min) (point-max) '(read-only nil))
(erase-buffer)
(insert "Calculating unlinked references...")))
(delete-other-windows)
(if (car (window-margins))
(setq win-width (+ (window-width) (* 2 (car (window-margins)))))
(setq win-width (window-width)))
(if (< win-width 100)
(split-window-below)
(split-window-right))
(other-window 1)
(switch-to-buffer buf)
(insert "Calculating unlinked references..."))))
;;;###autoload
(defun gkroam-show-unlinked ()
"Show unlinked references of current page in a side window."
(interactive)
(if (gkroam-at-root-p)
(let ((title (gkroam-retrive-title
(file-name-nondirectory (buffer-file-name)))))
(gkroam-set-unlinked-references title))
(message "Not in the gkroam directory!")))
;;;###autoload
(defun gkroam-link-unlinked (title line-number)
"Transform unlinked references in LINE-NUMBER line
to linked references for TITLE page."
(interactive)
(let* ((page
(save-excursion
(when (re-search-backward gkroam-backlink-regexp nil t)
(match-string-no-properties 1))))
(page-buf (find-file-noselect (gkroam--get-file page))))
(save-excursion
(with-current-buffer page-buf
(forward-line (- line-number (line-number-at-pos)))
(catch 'break
(while (re-search-forward title (line-end-position) t)
(when (gkroam--unlinked-title-valid-p)
(gkroam-new-from-region (match-beginning 0) (match-end 0) t)
(gkroam-set-unlinked-references title)
(throw 'break
(message "Have linked this to references.")))))))))
;; ----------------------------------------
;;;;; headline linked references
(defun gkroam--get-headlines (title)
"Get page's headline list, the page is titled with TITLE."
(with-temp-buffer
(insert-file-contents
;; do not use `insert-file-contents-literally',
;; it cannot show chinese normally.
(gkroam--get-file (gkroam-retrive-page title)))
(save-restriction
(gkroam--narrow-to-content)
(org-element-map (org-element-parse-buffer) 'headline
(lambda (headline)
(org-element-property :raw-value headline))))))
(defun gkroam-goto-headline (id)
"Goto headline with id ID."
(org-id-goto id)
(gkroam-update)
(gkroam-fontify-link)
(gkroam-prettify-page))
(defun gkroam-set-headline-id (title headline)
"Cache the HEADLINE's id of page titled with TITLE in db."
(when-let ((page (gkroam-retrive-page title)))
(let* ((file (gkroam--get-file page))
(page-buf (find-file-noselect file t))
headline-id)
(with-current-buffer page-buf
(save-excursion
(goto-char (point-min))
(re-search-forward (concat "^*+ " headline " *$") nil t)
(let ((alist (db-get title gkroam-headline-db)))
(if alist
(let ((kv (assoc headline alist)))
(setq headline-id (org-id-get-create))
(if kv
(unless (string= headline-id (cdr kv))
(setq alist (assoc-delete-all headline alist))
(push (cons headline headline-id) alist))
(push (cons headline (org-id-get-create)) alist))
(db-put title alist gkroam-headline-db))
(db-put title `(,(cons headline (org-id-get-create))) gkroam-headline-db)))
(save-buffer)))
headline-id)))
;; ----------------------------------------
;;;;; gkroam cache
(defvar gkroam-wc-regexp-chinese-char-and-punc
(rx (category chinese))
"Regular expression to match Chinese characters and punctuations.")
(defvar gkroam-wc-regexp-chinese-punc
"[。，！？；：「」『』（）、【】《》〈〉※—]"
"Regular expression to match Chinese punctuations.")
(defvar gkroam-wc-regexp-english-word
"[a-zA-Z0-9-]+"
"Regular expression to match English words.")
(defun gkroam-word-count ()
"Count gkroam page' words."
(interactive)
(let ((v-buffer-string
(if (eq major-mode 'org-mode)
(replace-regexp-in-string
"^#\\+.+" ""
(buffer-substring-no-properties
(point-min) (point-max)))
(buffer-substring-no-properties
(point-min) (point-max))))
(chinese-char-and-punc 0)
(chinese-punc 0)
(english-word 0)
(chinese-char 0))
(with-temp-buffer
(setq v-buffer-string
(replace-regexp-in-string
(format "^ *%s *.+" comment-start) "" v-buffer-string))
(insert v-buffer-string)
(goto-char (point-min))
(while (re-search-forward gkroam-wc-regexp-chinese-char-and-punc nil :no-error)
(setq chinese-char-and-punc (1+ chinese-char-and-punc)))
(goto-char (point-min))
(while (re-search-forward gkroam-wc-regexp-chinese-punc nil :no-error)
(setq chinese-punc (1+ chinese-punc)))
(goto-char (point-min))
(while (re-search-forward gkroam-wc-regexp-english-word nil :no-error)
(setq english-word (1+ english-word))))
(setq chinese-char (- chinese-char-and-punc chinese-punc))
(+ chinese-char english-word)))
(defun gkroam--get-page (title)