This is a follow-up to 758de957.
- unify the metrics and drawing of \sqrt and \root using helper
functions mathed_root_metrics and mathed_draw_root.
- compute the vertical spacing above the nucleus of the root following
rule 11 of the TeXbook. In particular, it is different in inline and
display style.
- draw the root glyph without hard-coded pixel values. Make the line
width depend on the zoom.
more work is needed to implement properly rule 11:
- Ideally, we should use sqrt glyphs from the math fonts. Note that
then we would get rule thickness from there.
- The positioning of the root MathData is arbitrary. It should
follow the definition of \root...\of... in The Texbook in
Apprendix B page 360.
Fixes bug #10814.
(cherry picked from commit 16af6e7c50)
(cherry picked from commit 6cb6f78ae9)
Now the helper class contains logic that checks whether buffer are
known before closing them. This avoids potential crashes.
Use it in different places to siplify code. It is not clear at this
point whether it should be used everywhere.
Followup to bug #10847.
(cherry picked from commit cd9e42dc35)
It may happen that the buffers are visited in order buffer1,
buffer2, buffer1. In this case, we want to have only one undo group
in buffer1. The solution is to replace buffer_ with a set<Buffer*>.
A use case among others is InsetLabel::updateReferences.
(cherry picked from commit cc7364dfc5)
The correct behavior is to go to position 0 going up from first row,
and to end of row when going down on last row.
The targetx value of the cursor is not updated, which makes cursor
movement more natural.
Fixes bug #10701.
(cherry picked from commit 34285cc683)
The issue here was that the element was only removed from the queue
after the func request was processed, but within that process, other
function could access the queue, so the queue could even be empty
when this function finally wanted to remove the item.
Fixes: #10406.
(cherry picked from commit dadec50a18)
When pasting "\big" without any following delimiter, avoid
processing the same token again and again. For unknown reasons,
the delim docstring turns out to always be not empty: even when
it simply contains a '0' (no delimiter follows), its length is 1.
Fixes bug #11027.
(cherry picked from commit 8e8b3f6104)
Several problems:
* The regex failed at names such as 1_text_2_text.tex
(returned "2_text.tex)
* The regex failed at names such as 12_text.tex
(returned "2_text.tex)
* Masters with digits in the name (2018_text.tex) were
tracked as their own children
(cherry picked from commit 398e026250)
When we switched from r'...' to b'...', this required strings used
as input to re.compile to be double-escaped. It's not an issue with
"\s", because "\s" has no special meaning in a string.
Also, printing in binary mode did not output a line ending.
(cherry picked from commit 6b5a7116cd)
