We only support escaping quotes inside a quote, and only of the same
type as the enclosing quote.
I.e.
"double quote \"escaped double quote\""
But not
"double quote \'invalid escaped single quote\'"
search_update_selection() was changed in 1.4.x to *first* update the
selection, *then* move the viewport.
This leads to a crash if the new match (selection) is outside the
current viewport; the selection code assumes the updated selection
endpoint is in the visible viewport.
Changing back to *first* move the viewport, *then* update the
selection solves this.
* Don't move the viewport if the new match is already fully visible
* When we do have to move the viewport, position it such that the new
match ends up roughly in the middle.
Previously, our secondary DA response indicated a) VT420, b) an XTerm
version number.
Now, we indicate VT220 (which corresponds to the primary DA response),
and we report foot's version number as MMmmpp. I.e major, minor and
patch versions, using two digits.
E.g. 1.4.2 is encoded as 010402
When copying the image data for the left and right parts of the
splitted images, use the sixel's height, not the cell height.
This fixes a crash when the sixel didn't cover the entire cell height.
LF should always clear LCF. Previously, it was done implicitly in
term_cursor_down(). I.e it was cleared as long as the cursor wasn't at
the bottom of the scrolling region
Previously, C0::VT was implemented as a simple 'cursor down'. I.e. it
would behave as LF **until** it reached the bottom of the screen,
where instead of scrolling, it became a no-op.
See https://vt100.net/docs/vt102-ug/chapter5.html
The logic that breaks out of sixel loops does not work for rows that
has already wrapped around.
Thus, we need to destroy sixels that are about to be scrolled
out *before* we actually scroll.
Since this is the *only* time we destroy sixels (instead of
overwriting it), rename the sixel functions. And, since they now do a
very specific thing, they can be greatly simplified (and thus faster).
If changing the font size causes the cell size to decrease, either
horizontally or vertically (or both), then delete all sixels since the
grid space they allocated no longer is enough to hold the images.
