Separating key cancellations from key signature changes: Difference between revisions
mNo edit summary |
mNo edit summary |
||
| Line 3: | Line 3: | ||
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 [ | 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: | ||
... | |||
staff-bar | staff-bar | ||
key-cancellation | key-cancellation | ||
key-signature | key-signature | ||
... | ... | ||
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>. | ||