Separating key cancellations from key signature changes - Revision history

Lemzwerg at 06:10, 12 January 2026

2026-01-12T06:10:09Z

← Older revision		Revision as of 06:10, 12 January 2026
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	The value of <code>break-align-orders</code> is a vector of length 3, with quoted lists of breakable items as elements. Each list describes the default order of prefatory matter at the end, in the middle, and at the beginning of a line, respectively. We are only interested in changing the behaviour in the middle of a line.		The value of <code>break-align-orders</code> is a vector of length 3, with quoted lists of breakable items as elements. Each list describes the default order of prefatory matter at the end, in the middle, and at the beginning of a line, respectively. We are only interested in changing the behaviour in the middle of a line.

	If you look up the definition of <code>break-align-orders</code> in LilyPond's [~~https://lilypond.org/doc/v2.24/Documentation~~/internals/breakalignment Internals Reference], you get the following order in the second element:		If you look up the definition of <code>break-align-orders</code> in LilyPond's [{{LILYSTABLEDOC}}/internals/breakalignment Internals Reference], you get the following order in the second element:

	~~<pre>~~...		...
	staff-bar		staff-bar
	key-cancellation		key-cancellation
	key-signature		key-signature
	...~~</pre>~~		...

	We want to change that, moving <code>key-cancellation</code> before <code>staff-bar</code>. To make this happen we use the <code>grob-transformer</code> function, which gives us access to the original vector as the second argument of the lambda function, here called <var>orig</var> (we don't need the first argument, <var>grob</var>). We return a new vector, with unchanged first and last elements. For the middle element, we first remove <code>key-cancellation</code> from the list, then adding it again before <code>staff-bar</code>.		We want to change that, moving <code>key-cancellation</code> before <code>staff-bar</code>. To make this happen we use the <code>grob-transformer</code> function, which gives us access to the original vector as the second argument of the lambda function, here called <var>orig</var> (we don't need the first argument, <var>grob</var>). We return a new vector, with unchanged first and last elements. For the middle element, we first remove <code>key-cancellation</code> from the list, then adding it again before <code>staff-bar</code>.

Lemzwerg at 10:39, 8 January 2026

2026-01-08T10:39:07Z

← Older revision		Revision as of 10:39, 8 January 2026
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	The value of <code>break-align-orders</code> is a vector of length 3, with quoted lists of breakable items as elements. Each list describes the default order of prefatory matter at the end, in the middle, and at the beginning of a line, respectively. We are only interested in changing the behaviour in the middle of a line.		The value of <code>break-align-orders</code> is a vector of length 3, with quoted lists of breakable items as elements. Each list describes the default order of prefatory matter at the end, in the middle, and at the beginning of a line, respectively. We are only interested in changing the behaviour in the middle of a line.

	If you look up the definition of <code>break-align-orders</code> in LilyPond's ~~Internal Reference (see the~~ [https://lilypond.org/doc/v2.24/Documentation/internals/breakalignment ~~<code>BreakAlignment</code>~~] ~~grob)~~, you get the following order in the second element:		If you look up the definition of <code>break-align-orders</code> in LilyPond's [https://lilypond.org/doc/v2.24/Documentation/internals/breakalignment Internals Reference], you get the following order in the second element:

	<pre>...		<pre>...

Lemzwerg at 14:26, 29 November 2025

2025-11-29T14:26:23Z

← Older revision		Revision as of 14:26, 29 November 2025
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			[[Category:Scheme]]
	[[Category:Tweaks and overrides]]		[[Category:Tweaks and overrides]]
	[[Category:Included in the official documentation]]		[[Category:Included in the official documentation]]
	[[Category:Snippet]]		[[Category:Snippet]]

Lemzwerg: New category

2025-11-21T23:33:54Z

New category

← Older revision		Revision as of 23:33, 21 November 2025
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	[[Category:Included in the official documentation]][[Category:Snippet]]		[[Category:Included in the official documentation]]
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Lemzwerg at 22:59, 21 November 2025

2025-11-21T22:59:42Z

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	[[Category:Tweaks and overrides]]		[[Category:Tweaks and overrides]]
	[[Category:Included in the official documentation]]		[[Category:Included in the official documentation]][[Category:Snippet]]

Lemzwerg at 10:44, 19 November 2025

2025-11-19T10:44:10Z

← Older revision		Revision as of 10:44, 19 November 2025
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	By default, the accidentals used for key cancellations are placed adjacent to those for key signature changes. This behavior can be changed by overriding the <code>break-align-orders</code> property of the <code>BreakAlignment</code> grob.		By default, the accidentals used for key cancellations are placed adjacent to those for key signature changes. This behavior can be changed by overriding the <code>break-align-orders</code> property of the <code>BreakAlignment</code> grob.

	The value of <code>break-align-orders</code> is a vector of ~~length 3~~, with quoted lists of breakable items as elements. Each list describes the default order of prefatory matter at the end, in the middle, and at the beginning of a line, respectively. We are only interested in changing the behaviour in the middle of a line.		The value of <code>break-align-orders</code> is a vector of length 3, with quoted lists of breakable items as elements. Each list describes the default order of prefatory matter at the end, in the middle, and at the beginning of a line, respectively. We are only interested in changing the behaviour in the middle of a line.

	If you look up the definition of <code>break-align-orders</code> in LilyPond's Internal Reference (see the [https://lilypond.org/doc/v2.22/Documentation/internals/breakalignment <code>BreakAlignment</code>] grob), you get the following order in the second element:		If you look up the definition of <code>break-align-orders</code> in LilyPond's Internal Reference (see the [https://lilypond.org/doc/v2.24/Documentation/internals/breakalignment <code>BreakAlignment</code>] grob), you get the following order in the second element:

	<pre>...		<pre>...
Line 10:		Line 10:
	key-signature		key-signature
	...</pre>		...</pre>
	We want to change that, moving <code>key-cancellation</code> before <code>staff-bar</code>. To make this happen we use the <code>grob-transformer</code> function, which gives us access to the original vector as the second argument of the lambda function, here called <code>orig</code> (we don't need the first argument, <code>grob</code>). We return a new vector, with unchanged first and last elements. For the middle element, we first remove <code>key-cancellation</code> from the list, then adding it again before <code>staff-bar</code>.

	<lilypond version="2.24" ~~full~~>		We want to change that, moving <code>key-cancellation</code> before <code>staff-bar</code>. To make this happen we use the <code>grob-transformer</code> function, which gives us access to the original vector as the second argument of the lambda function, here called <var>orig</var> (we don't need the first argument, <var>grob</var>). We return a new vector, with unchanged first and last elements. For the middle element, we first remove <code>key-cancellation</code> from the list, then adding it again before <code>staff-bar</code>.

			<lilypond version="2.24">
	%LSR based on		%LSR based on
	%LSR https://stackoverflow.com/questions/40964806/scheme-inserting-a-number-in-a-list		%LSR https://stackoverflow.com/questions/40964806/scheme-inserting-a-number-in-a-list
Line 53:		Line 54:
	\cancellationFirst		\cancellationFirst
	\music }		\music }

	~~\paper { tagline = ##f }~~
	</lilypond>		</lilypond>

	~~[[Category:Pitches]]~~
	[[Category:Pitches]]		[[Category:Pitches]]
	[[Category:Tweaks and overrides]]		[[Category:Tweaks and overrides]]
	[[Category:Included in the official documentation]]		[[Category:Included in the official documentation]]

Jean Abou Samra: Replace version="2.24.0" with version="2.24" now that the LilyWiki extension supports auto-selecting the latest release in a stable series

2025-11-16T18:51:03Z

Replace version="2.24.0" with version="2.24" now that the LilyWiki extension supports auto-selecting the latest release in a stable series

← Older revision		Revision as of 18:51, 16 November 2025
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	We want to change that, moving <code>key-cancellation</code> before <code>staff-bar</code>. To make this happen we use the <code>grob-transformer</code> function, which gives us access to the original vector as the second argument of the lambda function, here called <code>orig</code> (we don't need the first argument, <code>grob</code>). We return a new vector, with unchanged first and last elements. For the middle element, we first remove <code>key-cancellation</code> from the list, then adding it again before <code>staff-bar</code>.		We want to change that, moving <code>key-cancellation</code> before <code>staff-bar</code>. To make this happen we use the <code>grob-transformer</code> function, which gives us access to the original vector as the second argument of the lambda function, here called <code>orig</code> (we don't need the first argument, <code>grob</code>). We return a new vector, with unchanged first and last elements. For the middle element, we first remove <code>key-cancellation</code> from the list, then adding it again before <code>staff-bar</code>.

	<lilypond version="2.24.0" full>		<lilypond version="2.24" full>
	%LSR based on		%LSR based on
	%LSR https://stackoverflow.com/questions/40964806/scheme-inserting-a-number-in-a-list		%LSR https://stackoverflow.com/questions/40964806/scheme-inserting-a-number-in-a-list

Jean Abou Samra: Import snippet from LSR

2025-10-26T22:40:52Z

Import snippet from LSR

New page

By default, the accidentals used for key cancellations are placed adjacent to those for key signature changes. This behavior can be changed by overriding the <code>break-align-orders</code> property of the <code>BreakAlignment</code> grob.

The value of <code>break-align-orders</code> is a vector of length 3, with quoted lists of breakable items as elements. Each list describes the default order of prefatory matter at the end, in the middle, and at the beginning of a line, respectively. We are only interested in changing the behaviour in the middle of a line.

If you look up the definition of <code>break-align-orders</code> in LilyPond's Internal Reference (see the [https://lilypond.org/doc/v2.22/Documentation/internals/breakalignment <code>BreakAlignment</code>] grob), you get the following order in the second element:

<pre>...
staff-bar
key-cancellation
key-signature
...</pre>
We want to change that, moving <code>key-cancellation</code> before <code>staff-bar</code>. To make this happen we use the <code>grob-transformer</code> function, which gives us access to the original vector as the second argument of the lambda function, here called <code>orig</code> (we don't need the first argument, <code>grob</code>). We return a new vector, with unchanged first and last elements. For the middle element, we first remove <code>key-cancellation</code> from the list, then adding it again before <code>staff-bar</code>.

<lilypond version="2.24.0" full>
%LSR based on
%LSR https://stackoverflow.com/questions/40964806/scheme-inserting-a-number-in-a-list

#(define (insert-before where what lst)
(cond
((null? lst) ; If the list is empty,
(list what)) ; return a single-element list.
((eq? where (car lst)) ; If we find symbol `where`,
(cons what lst)) ; insert `what` before curr. position.
(else ; Otherwise keep building the list by
(cons (car lst) ; adding the current element and
; recursing with the next element.
(insert-before where what (cdr lst))))))

cancellationFirst =
\override Score.BreakAlignment.break-align-orders =
#(grob-transformer
'break-align-orders
(lambda (grob orig)
(let* ((middle (vector-ref orig 1))
(middle (delq 'key-cancellation middle))
(middle (insert-before
'staff-bar 'key-cancellation middle)))
(vector
;; end of line
(vector-ref orig 0)
;; middle of line
middle
;; beginning of line
(vector-ref orig 2)))))

music = { \key es \major d'1 \bar "||"
\key a \major d'1 }

{ <>^\markup "default"
\music }

{ <>^\markup "cancellation first"
\cancellationFirst
\music }

\paper { tagline = ##f }
</lilypond>

[[Category:Pitches]]
[[Category:Pitches]]
[[Category:Tweaks and overrides]]
[[Category:Included in the official documentation]]