branch: externals/org-modern
commit 8cad2c3d839a720be32b25e12946572b8e569ca2
Merge: 3cc432dc99 fe226e8bc1
Author: Daniel Mendler <m...@daniel-mendler.de>
Commit: GitHub <nore...@github.com>

    Merge pull request #281 from minad/org-modern-indent
    
    Org modern indent
---
 CHANGELOG.org        |  33 ++++-
 README.org           |  91 ++++++++++++-
 org-modern-indent.el | 374 +++++++++++++++++++++++++++++++++++++++++++++++++++
 org-modern.el        |  17 ++-
 4 files changed, 508 insertions(+), 7 deletions(-)

diff --git a/CHANGELOG.org b/CHANGELOG.org
index 59f4d9acf3..c25a84ba62 100644
--- a/CHANGELOG.org
+++ b/CHANGELOG.org
@@ -1,9 +1,11 @@
 #+title: org-modern.el - Changelog
-#+author: Daniel Mendler
+#+author: Daniel Mendler & J.D. Smith
 #+language: en
 
 * Development
 
+- Merged [[https://github.com/jdtsmith/org-modern-indent][org-modern-indent]] 
as a new extension.
+- Automatically provide code block bracket styling when ~org-indent~ is 
enabled using ~org-modern-indent-mode~.
 - Add ~org-modern-habit~ face to improve habit progress fontification.
 
 * Version 1.7 (2025-03-11)
@@ -67,3 +69,32 @@
 * Version 0.8 (2023-02-15)
 
 - Start of changelog.
+
+* org-modern-indent change history
+
+~org-modern-indent~ was incorporated as an extension to ~org-modern~ in v2.0.  
The prior change history for ~org-modern-indent~ is as follows, based on its 
release versions as a separate package:
+
+- **v0.6**: Merged as an ~org-modern~ extension.
+- **v0.5.1**: Small simplifications for block drawing.
+- **v0.5**: Another complete rewrite which substantially improves
+  performance and accuracy.  Now block detection uses ~org-element~
+  and the block styling is implemented in
+  ~before/after-change-functions~. Benefits include:
+  1. Higher performance and more reliable fontification.
+  2. Ability to detect and correctly treat _damaged_ blocks
+     (header/footer line altered or removed) as well as _merged_ blocks.
+  2. Caches all prefix strings for lower memory usage/GC churn.
+  3. No more "runaway" formatting when partial blocks are created:
+     only _real_ blocks (according to ~org-element~) are
+
+  Note that v0.5 implements indented block styling using display
+  properties on the indentation text, so navigation will "skip over"
+  it.
+- **v0.1**: features a complete re-write to use font-lock directly.  This
+  has a few benefits:
+  1. No longer relies on org-mode face names for recognizing
+     blocks, so ~org-src-block-faces~ can have arbitrary faces
+     applied, e.g. for different ~src~ languages, as in the screenshot.
+  2. Eliminates the "race" between font-locking and applying the prefix text 
properties.
+  3. Enables in-text bracket decorations for "bulk-indented" blocks, for 
example blocks situated
+     in an arbitrarily-nested plain list item.
diff --git a/README.org b/README.org
index 1409c4983c..1c87a05c18 100644
--- a/README.org
+++ b/README.org
@@ -33,6 +33,16 @@ recommend variants of the 
[[https://github.com/be5invis/Iosevka][Iosevka]] font,
 the Org buffer. Larger values of =line-spacing= are not recommended, since 
Emacs
 does not center the text vertically (see Emacs 
[[https://debbugs.gnu.org/cgi/bugreport.cgi?bug=76390][bug#76390]]).
 
+* Indent
+
+Since version 2.0, this package also incorporates ~org-modern-indent~, which 
provides block bracket styling when ~org-indent~ is enabled, including support 
for "bulk-indented" blocks nested within plain lists:
+
+#+html: <img width="716" alt="image" 
src="https://github.com/user-attachments/assets/7ca42ce7-dcfb-4c66-b5f4-1798a4fd4df5";
 />
+
+~org-modern-indent~ is enabled by ~org-modern~ by default if you use 
~org-indent~; configure ~org-modern-indent-block=nil~ to disable this behavior. 
To activate ~org-indent-mode~ in all org files, set ~org-startup-indented=t~.  
+
+*Note*: Non-nil ~line-spacing~ is not recommended with ~org-modern-indent~, as 
it leads to gaps in the vertical bars drawn to indicate blocks.  
+
 * Configuration
 
 The package is available on GNU ELPA and MELPA. You can install the package 
with
@@ -93,14 +103,89 @@ screenshot above after the installation of =org-modern=.
 (global-org-modern-mode)
 #+end_src
 
+An alternative setup, using ~use-package~ and modifying some of the display 
entities:
+
+#+begin_src emacs-lisp
+  (use-package org-modern
+    :custom
+    (org-modern-hide-stars nil)
+    (org-modern-todo-faces
+     '(("STARTED" :foreground "yellow")
+       ("CANCELED" org-special-keyword :inverse-video t :weight bold)))
+    (org-modern-list
+     '((?* . "•")
+       (?+ . "‣")))
+    (org-modern-fold-stars
+     '(("▶" . "▼")
+       ("▷" . "▽")
+       ("▸" . "▾")
+       ("▹" . "▿")))
+    (org-modern-checkbox
+     '((?X . "✔")
+       (?- . "┅")
+       (?\s . " ")))
+    (org-modern-label-border 1)
+    :hook
+    (org-mode . org-modern-mode)
+    (org-agenda-finalize . org-modern-agenda))
+#+end_src
+
+
 * Incompatibilities
 
-- =org-indent-mode= is not compatible with the block prettification in the 
fringe.
-  If =org-indent-mode= is enabled, =org-modern= will disable the block 
prettification.
 - =org-num-mode= interferes with the =org-modern= prettification of TODO 
keywords.
 - =visual-wrap-prefix-mode= relies on the =wrap-prefix= text property which is 
also
   used by =org-modern=.
 
+* Block Indentation Hints
+
+A few hints for managing indented blocks.
+
+** Bulk-indented blocks (e.g. within plain lists):
+
+Bulk-indented blocks have "real" (space/tab) indentation applied and managed 
by org.  This extra indentation is applied by org on _top_ of the (fake, 
prefix-based) indentation used by org-indent.  To nest blocks properly within 
such indented content, e.g. in plain list items, you only have to begin the 
~#+begin~ at the same level as the list element's text.
+
+As an important principle, ~org-modern-indent~ does not alter the contents of 
the text in your org documents, not even indentation.  It just styles what is 
there.  To help achieve proper block bulk-indented alignment, here are a few 
ways to alter blocks indentation using org and other commands:
+
+- **Start things right**: Hit return after your last line of text (e.g in a 
list item), then immediately hit =C-c C,= to create the desired block.  It will 
be indented at the right level:
+  
+  #+begin_src org
+     - This list item contains a:
+       - sublist, which holds a block:
+         [C-c C-,] here
+  #+end_src
+   
+- *Move flush left*: Note: =M-{= will get you to the start of a block quickly. 
 =M-\= at block start will move the block's first header line to column 0.  
Then =M-S-left= (or =right=) will indent the full block.
+- *Indent rigidly*: =M-h= selects the entire block. Then =C-x TAB= enters 
"rigid indent" mode, after which left/right moves the entire block.
+- *Re-indent a block*: If you have a block that is partially aligned, perhaps 
with a "hanging end", like so:
+  
+  #+begin_src org
+   
+   - List 1
+       - List 2
+         ,#+begin_src lang
+            foo_lang(x)
+         ,#+end_src
+  #+end_src
+   
+  you can simply use =M-S-left/right= at block start (or in fact anywhere on 
the block header/footer) to ~org-indent-block~.  Note that 
~org-src-preserve-indentation=nil~ is an important setting, to allow org to 
(re-)indent blocks to respect the local indentation inside list and other 
elements.  Also note that (from ~org-indent-region~): 
+
+  #+begin_quote
+  The function will not indent contents of example blocks, verse blocks and 
export blocks as leading white spaces are assumed to be significant there.
+  #+end_quote
+
+** Font spacing and faces
+
+The default ~fixed-pitch~ font (from which ~org-meta-line~ inherits) has line 
spacing >1.0 on some systems. This will introduce gaps _even if your default 
font is changed_, and ~line-space~ is nil.  To correct it, add: 
+
+#+begin_src emacs-lisp
+(set-face-attribute 'fixed-pitch nil :family "Hack" :height 1.0) ; or whatever 
font family
+#+end_src
+
+*** The bracket style 
+
+If you'd like a different face than ~org-meta-line~ for the "bracket", 
configure the ~org-modern-indent-bracket-line~ face.
+
 * Alternatives
 
 The tag style of =org-modern= is inspired by Nicholas Rougier's 
[[https://github.com/rougier/svg-tag-mode][svg-tag-mode]]. In
@@ -116,7 +201,7 @@ table and block styling from =org-modern=. If you are 
interested in further
 tweaks, Emacs comes with the builtin =prettify-symbols-mode= which can be used 
for
 individual styling of custom keywords.
 
-Alternatives are the older =org-superstar= and =org-bullets= packages, which 
are
+Alternatives are the older 
[[https://github.com/integral-dw/org-superstar-mode][=org-superstar=]] and 
[[https://github.com/sabof/org-bullets][=org-bullets=]] packages, which are
 more limited and mainly adjust headlines and lists. =org-superstar= relies on
 character composition, while =org-modern= uses text properties, which are
 considered more future-proof. Note that =org-modern= is a full replacement for
diff --git a/org-modern-indent.el b/org-modern-indent.el
new file mode 100644
index 0000000000..0f70513852
--- /dev/null
+++ b/org-modern-indent.el
@@ -0,0 +1,374 @@
+;;; org-modern-indent.el --- Style indented blocks -*- lexical-binding: t -*-
+
+;; Copyright (C) 2022-2025  J.D. Smith
+
+;; Author: J.D. Smith
+;; Created 2022
+;; Keywords: convenience, text
+
+;; This file is 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 of the License, 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, see <https://www.gnu.org/licenses/>.
+
+;;; Commentary:
+
+;; `org-modern-indent' is an `org-modern' extension which approximates
+;; the block highlighting style of `org-modern'.  By default, it is
+;; activated when `org-indent' is is active in the buffer.  It was
+;; merged into `org-modern' as of v2.0.
+
+;;; Code:
+(require 'compat)
+(require 'org-indent)
+(require 'org-element)
+(eval-when-compile (require 'cl-lib))
+
+;;;; Face and style
+(defgroup org-modern-indent nil
+  "Org-modern style blocks which works with org-indent."
+  :group 'org
+  :prefix "org-modern-indent-")
+
+;; Face for org-modern-indent line
+(defface omi/bracket-line
+  '((t (:inherit (org-meta-line) :weight light)))
+  "Face for bracket line in org-modern-indent."
+  :group 'faces)
+
+(defconst omi/begin (propertize "╭" 'face 'omi/bracket-line))
+(defconst omi/guide (propertize "│" 'face 'omi/bracket-line))
+(defconst omi/end   (propertize "╰" 'face 'omi/bracket-line))
+
+(defvar omi/begin-re
+  "\\([ \t]*\\)\\(#\\+\\)\\(?:begin\\|BEGIN\\)_\\S-")
+
+;;;; Utility
+(defsubst omi/-lbp (p &optional n)
+  "Return the line beginning position N at point P."
+  (save-excursion (goto-char p) (pos-bol n)))
+
+;;;; Block prefix cache
+(defvar omi/-prefixes (make-hash-table :test #'equal)
+  "A hash table of cached line prefixes.
+The hash index is a combination of the (unstyled) `org-indent' length
+and the \"real\" (space) indentation at the block beginning.  Each hash
+value is a vector of length 3:
+
+  [BEGIN GUIDE END]
+
+holding the wrap/indent prefix strings for the block begin, end, and
+guide (body).")
+
+(defun omi/-prefix (org-indent extra-indent)
+  "Cache and return prefix strings based on the indent levels.
+There are 2 types of indentation: ORG-INDENT (styled with `org-indent'
+face), and EXTRA-INDENT (unstyled).  See `org-modern-indent--prefix' for
+the contents."
+  (unless (and (= org-indent 0) (= extra-indent 0))
+    (let* ((key (+ org-indent (* 1000 extra-indent)))
+          (cached (gethash key omi/-prefixes)))
+      (or cached
+         (puthash key
+                  (cl-loop for type in '("begin" "guide" "end")
+                           for tstr = (symbol-value
+                                       (intern (concat "org-modern-indent-" 
type)))
+                           with olen = (if (> extra-indent 0) org-indent
+                                         (1- org-indent))
+                           with ostr = (and (> olen 0)
+                                            (propertize (make-string olen ?\s)
+                                                        'face '(org-indent 
default)))
+                           with pstr = (and (> extra-indent 0)
+                                            (make-string (1- extra-indent) 
?\s))
+                           collect (concat ostr pstr tstr))
+                  omi/-prefixes)))))
+
+;;;; Finding and operating on blocks
+(defsubst omi/-block-p (el)
+  "Return non-nil if EL is an org block element."
+  (when-let ((el) (type (car el)))
+    (memq type
+         '(center-block comment-block dynamic-block
+                        example-block export-block quote-block
+                        special-block src-block verse-block))))
+
+(defun omi/-block-at-point (&optional pos)
+  "Return the org block element at POS, if any.
+Considers both the element at point, and its parent.  Does not consider
+affiliated content like title as part of the block."
+  (let ((pos (or pos (point))))
+    (when-let ((element (org-element-at-point pos)))
+      (when (or (omi/-block-p element)
+               (omi/-block-p
+                (setq element (org-element-property :parent element))))
+       (unless (< pos (org-element-property :post-affiliated element))
+         element)))))
+
+(defsubst omi/-block-beg-end (node)
+  "Return a cons of NODE's (BEG . END).
+BEG is at the beginning of the #+BEGIN line, and END is at the end of
+the #+END line."
+  (let* ((bbeg (org-element-property :post-affiliated node)) ; on #+begin
+        (bend (save-excursion
+                (goto-char (org-element-property :end node))
+                (skip-chars-backward "\n\t ")
+                (point))))
+    (cons bbeg bend)))
+
+(defun omi/-walk-blocks (beg end fun)
+  "Walk all org blocks intersecting the region from BEG..END.
+FUN is called on each block with the beginning and end positions of the
+block (at the beginning and end of the lines containing the header and
+footer, respectively).  Note that the first block's beginning may lie
+prior to BEG, and the last block's end my fall past END, if either only
+partially overlaps the region."
+  (org-with-wide-buffer
+   (goto-char beg)
+   (let ((node (omi/-block-at-point)) finished)
+     (while (not finished)
+       (when node
+        (cl-destructuring-bind (bbeg . bend) (omi/-block-beg-end node)
+          (funcall fun bbeg bend)
+          (goto-char bend)
+          (when (>= bend end) (setq finished t)))) ; last block
+       (unless finished
+        (if (re-search-forward omi/begin-re end t)
+            (setq node (omi/-block-at-point))
+          (setq finished t)))))))
+
+;;;; Drawing block brackets
+(defun omi/-draw-block (beg end beg0 end0 org-indent real-indent)
+  "Insert brackets for block between BEG and END.
+BEG0 and END0 represents the block's full range, corresponding to the
+line beginning/end positions of the block's #+BEGIN/END header/footer
+lines.  The `org-indent' prefix length at block header is ORG-INDENT,
+and REAL-INDENT is the amount of \"real\" (hard space) block
+indentation.  REAL-INDENT may be zero."
+  (with-silent-modifications
+    (pcase-let* (((seq beg-prefix guide-prefix end-prefix)
+                 (omi/-prefix org-indent real-indent))
+                ((seq beg-display guide-display end-display)
+                 (and (> real-indent 0) (omi/-prefix real-indent 0)))
+                (beg-bol (omi/-lbp beg))
+                (body-start (max (omi/-lbp beg0 2) beg-bol)))
+      (cl-macrolet ((add-prefixes (pbeg pend line-prefix wrap-prefix)
+                     `(add-text-properties ,pbeg ,pend
+                       `(,@(and (= real-indent 0) `(line-prefix ,,line-prefix))
+                         wrap-prefix ,,wrap-prefix)))
+                   (add-guides (pbeg pend display-str)
+                     `(add-text-properties ,pbeg ,pend
+                       `( omi/display ,,display-str rear-nonsticky t))))
+       (when (> body-start beg)  ;; BEGIN
+         (add-prefixes beg-bol body-start beg-prefix guide-prefix)
+         (when (> real-indent 0)
+           (add-guides beg-bol (+ beg-bol real-indent) beg-display)))
+       (when (> end body-start)  ;; GUIDE BODY
+         (let* ((end-bol (omi/-lbp end))
+                (end0-bol (omi/-lbp end0))
+                (after-end (omi/-lbp end 2))
+                (body-final (if (= end-bol end0-bol) end-bol after-end)))
+           (add-prefixes body-start body-final guide-prefix guide-prefix)
+           (when (> real-indent 0)
+             (goto-char body-start)
+             (while (< (point) body-final)
+               (when (>= (current-indentation) real-indent)
+                 (add-guides (point) (+ (point) real-indent) guide-display))
+               (forward-line)))
+           (when (= end-bol end0-bol) ;; END
+             (if (= real-indent 0)
+                 (add-prefixes end-bol after-end end-prefix end-prefix)
+               (goto-char end-bol)
+               (when (>= (current-indentation) real-indent)
+                 (add-guides end-bol (+ end-bol real-indent) 
end-display))))))))))
+
+;;;; org-indent interfacing
+(defvar-local omi/-level-change-end nil)
+(defun omi/-refresh-maybe-watch (fun beg end &rest r)
+  "Watch for org-indent heading refreshes and record the new end position.
+FUN is the wrapped function `org-indent-refresh-maybe', and BEG,
+END, and R are its arguments."
+  ;; sadly org-indent-refresh-maybe modifies beg/end but does not return
+  (let ((oiap-orig (symbol-function 'org-indent-add-properties)))
+    (cl-letf (((symbol-function 'org-indent-add-properties)
+              (lambda (b e &optional delay)
+                (setq omi/-level-change-end (and (> e end) e))
+                (funcall oiap-orig b e delay))))
+      (apply fun beg end r))))
+
+(defun omi/-strip-display (beg end)
+  (with-silent-modifications
+    (remove-text-properties beg end '(omi/display nil))))
+
+(defvar-local omi/-init nil)
+(defun omi/-wait-and-refresh (buf)
+  "Wait for org-indent to finish initializing BUF, then refresh."
+  (if (or (not (bound-and-true-p org-indent-agentized-buffers))
+         (not (memq buf org-indent-agentized-buffers)))
+      (omi/init buf)
+    ;; still waiting
+    (when (buffer-live-p buf)
+      (with-current-buffer buf
+       (if omi/-init
+           (let ((cnt (cl-incf (cadr omi/-init))))
+             (if (> cnt 5)
+                 (user-error
+                  "org-modern-indent: Gave up waiting for %s to initialize"
+                  buf)
+               (timer-activate
+                (timer-set-time (car omi/-init)
+                                (time-add (current-time) 0.2)))))
+         (setq omi/-init
+               (list (run-at-time 0.1 nil #'omi/-wait-and-refresh buf)
+                     1)))))))
+
+(defun omi/-refresh ()
+  "Strip custom display property and refresh line prefix in entire buffer."
+  (with-silent-modifications
+    (org-with-wide-buffer
+     (when org-indent-mode
+       (omi/-strip-display (point-min) (point-max))
+       (org-indent-refresh-maybe (point-min) (point-max) nil)))))
+
+;;;; Before/after change
+(defun omi/-intersects-leader-at (target beg end)
+  "Return non-nil if BEG..END intersects initial non-blank text at TARGET."
+  (save-excursion
+    (goto-char target)
+    (back-to-indentation)
+    (let ((beg-targ (point))
+         (end-targ (progn (skip-chars-forward "^[:blank:]\n") (point))))
+      (and (<= beg end-targ) (<= beg-targ end)))))
+
+(defun omi/-before-change (beg end)
+  "Check the BEG..END range for modified block header/footer lines.
+Adds an `:org-modern-indent-block' text property to the block, with
+value `damaged' for damaged block."
+  (cl-labels
+      ((detect-block-damage (bl-beg bl-end)
+        "Detect and mark damaged blocks."
+        (unless (and (<= beg bl-beg) (>= end bl-end)) ; entire block 
replaced/deleted
+          (with-silent-modifications
+            (if (or (omi/-intersects-leader-at bl-beg beg end)
+                    (omi/-intersects-leader-at bl-end beg end))
+                (progn
+                  (put-text-property bl-beg (1+ bl-beg) :omi/indent nil) ; now 
unknown!
+                  (put-text-property bl-beg (omi/-lbp bl-end 2) :omi/block 
'damaged))
+              (put-text-property bl-beg (omi/-lbp bl-end 2) :omi/block t))))))
+    (omi/-walk-blocks beg end #'detect-block-damage)))
+
+(defun omi/-pos-in-leader-p (pos)
+  "Return non-nil if a block's header/footer leader text encompasses POS."
+  (when-let ((node (omi/-block-at-point pos)))
+    (org-with-wide-buffer
+     (cl-destructuring-bind (bbeg . bend) (omi/-block-beg-end node)
+       (or (omi/-intersects-leader-at bbeg pos pos)
+          (omi/-intersects-leader-at bend pos pos))))))
+
+(defun omi/-after-change (beg end _len)
+  "Perform after-change operations on changed text from BEG..END.
+To be added after `org-indent-refresh-maybe' on
+`after-change-functions'."
+  (with-silent-modifications
+    (let ((beg-block (get-text-property beg :omi/block))
+         (end-block (get-text-property end :omi/block))
+         extend)
+      (when (and beg-block (or (eq beg-block 'damaged) (omi/-pos-in-leader-p 
beg)))
+       (setq extend t
+             beg (or (previous-single-property-change beg :omi/block) beg)))
+      (when (and end-block (or (eq end-block 'damaged) (omi/-pos-in-leader-p 
end)))
+       (setq extend t
+             end (or (next-single-property-change end :omi/block) end)))
+      (when extend
+       (remove-text-properties beg end '(:omi/block nil :omi/indent nil))
+       (org-indent-add-properties beg end)))
+    ;; If we had a level change, extend down to the next heading
+    (when omi/-level-change-end (setq end (max end omi/-level-change-end)))
+    (setq beg (omi/-lbp beg) end (omi/-lbp end 2))
+    (remove-text-properties beg end '(omi/display nil))
+    (omi/-walk-blocks beg end
+     (lambda (bl-beg bl-end)
+       (let ((beg0 bl-beg) (end0 bl-end)
+            (pf (get-text-property bl-beg 'line-prefix))
+            oi-pos oi ci full-block)
+        (save-excursion
+          (goto-char bl-beg)
+          (back-to-indentation)
+          (setq oi-pos (point)
+                oi (get-text-property oi-pos :omi/indent)
+                ci (current-indentation)))
+        (unless (eq oi ci)
+          (put-text-property oi-pos (1+ oi-pos) :omi/indent ci))
+        (when (and oi (= oi 0) (/= oi ci)) ; was flush, is now indented:
+          (org-indent-add-properties bl-beg bl-end)) ; repair block's prefixes
+        (when (< bl-beg beg)           ; 1st block straddles BEG
+          (if (eq oi ci) (setq bl-beg beg) (setq full-block t)))
+        (when (> bl-end end)           ; last block straddles END
+          (if (eq oi ci) (setq bl-end end) (setq full-block t)))
+        (when full-block
+          (with-silent-modifications
+            (remove-text-properties bl-beg bl-end '(omi/display nil))))
+        (omi/-draw-block bl-beg bl-end beg0 end0 (length pf) ci))))))
+
+;;;; Mode/setup
+(defun omi/init (&optional buf)
+  "Register buffer BUF and refresh.
+To be added to `org-indent-post-buffer-init-functions'."
+  (interactive)
+  (let ((buf (or buf (current-buffer))))
+    (when (buffer-live-p buf)       ; org-capture buffers vanish fast
+      (with-current-buffer buf
+       (add-hook 'before-change-functions #'omi/-before-change nil t)
+       (or (memq #'omi/-after-change after-change-functions)
+           (cl-loop for func on after-change-functions
+                    if (eq (car func) 'org-indent-refresh-maybe) do
+                    (setcdr func (cons #'omi/-after-change (cdr func))) and 
return t)
+           (add-hook 'after-change-functions #'omi/-after-change 98 t))
+       (org-with-wide-buffer (omi/-after-change (point-min) (point-max) nil))
+       (setq omi/-init t)))))
+
+;;;###autoload
+(define-minor-mode omi/mode
+  "Org-modern-like block brackets within org-indent."
+  :global nil
+  :group 'org-modern-indent
+  (if omi/mode
+      (progn
+       (advice-add 'org-indent-refresh-maybe :around
+                   #'omi/-refresh-maybe-watch)
+       (cond
+        ;; already registered before, just toggle
+        ((or (called-interactively-p 'any) omi/-init) (omi/init))
+        ;; Register with buffer init
+        ((boundp 'org-indent-post-buffer-init-functions)
+         (add-hook 'org-indent-post-buffer-init-functions #'omi/init nil t))
+        ;; No hook available, use the less reliable method
+        (t (omi/-wait-and-refresh (current-buffer))))
+       (cl-pushnew 'omi/display
+                   (alist-get 'display char-property-alias-alist)))
+    ;; Disabling
+    (advice-remove 'org-indent-refresh-maybe #'omi/-refresh-maybe-watch)
+    (remove-hook 'before-change-functions #'omi/-before-change t)
+    (remove-hook 'after-change-functions #'omi/-after-change t)
+    (if (boundp 'org-indent-post-buffer-init-functions)
+       (remove-hook 'org-indent-post-buffer-init-functions #'omi/init t)
+      (cancel-timer (car omi/-init))
+      (setq omi/-init nil))
+    (omi/-refresh)))
+
+(provide 'org-modern-indent)
+;;; org-modern-indent.el ends here
+;; Local Variables:
+;; read-symbol-shorthands: (("omi/" . "org-modern-indent-") (":omi/" . 
":org-modern-indent-"))
+;; package-lint--sane-prefixes: "^omi/"
+;; End:
+ 
diff --git a/org-modern.el b/org-modern.el
index 22b3cba928..152e96f3ac 100644
--- a/org-modern.el
+++ b/org-modern.el
@@ -225,6 +225,11 @@ which specifies the offset of the block border from the 
edge of
 the window."
   :type '(choice boolean natnum))
 
+(defcustom org-modern-indent-block t
+  "Whether to style indented blocks when using `org-indent'.
+See `org-modern-indent-mode'."
+  :type 'boolean)
+
 (defcustom org-modern-keyword t
   "Prettify keywords like #+title.
 If set to t, the prefix #+ will be hidden.  If set to a string,
@@ -377,6 +382,9 @@ the font.")
 (defconst org-modern--table-overline '(:overline t))
 (defconst org-modern--table-sp '((space :width (org-modern--table-sp-width))
                                  (space :width (org-modern--table-sp-width))))
+(defvar org-indent-mode)
+(defvar org-modern-indent-mode)
+(declare-function org-modern-indent-mode "org-modern-indent")
 
 (defun org-modern--checkbox ()
   "Prettify checkboxes according to `org-modern-checkbox'."
@@ -796,7 +804,7 @@ whole buffer; otherwise, for the line at point."
         (2 '(face org-modern-label display #("  " 0 1 (face (:strike-through 
t)))) t))))
    ;; Do not add source block fringe markers if org-indent-mode is
    ;; enabled. org-indent-mode uses line prefixes for indentation.
-   ;; Therefore we cannot have both.
+   ;; org-modern-indent handles this.
    (when (and org-modern-block-fringe (not (bound-and-true-p org-indent-mode)))
      '(("^[ \t]*#\\+\\(?:begin\\|BEGIN\\)_\\S-"
         (0 (org-modern--block-fringe)))))
@@ -862,7 +870,9 @@ whole buffer; otherwise, for the line at point."
     (when (eq org-modern-star 'fold)
       (add-hook 'org-cycle-hook #'org-modern--cycle nil 'local))
     (org-modern--update-faces)
-    (org-modern--update-bitmaps))
+    (org-modern--update-bitmaps)
+    (when (and org-indent-mode org-modern-indent-block)
+      (org-modern-indent-mode 1)))
    (t
     (remove-from-invisibility-spec 'org-modern)
     (font-lock-remove-keywords nil org-modern--font-lock-keywords)
@@ -872,7 +882,8 @@ whole buffer; otherwise, for the line at point."
     (remove-hook 'org-after-promote-entry-hook #'org-modern--unfontify-line 
'local)
     (remove-hook 'org-after-demote-entry-hook #'org-modern--unfontify-line 
'local)
     (when (eq org-modern-star 'fold)
-      (remove-hook 'org-cycle-hook #'org-modern--cycle 'local))))
+      (remove-hook 'org-cycle-hook #'org-modern--cycle 'local))
+    (when org-modern-indent-mode (org-modern-indent-mode 0))))
   (without-restriction
     (with-silent-modifications
       (org-modern--unfontify (point-min) (point-max)))

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