The QTextLayout handling is terribly slow on Qt 4.8.7, but some
caching has been added in Qt5 that makes it much faster. For some
reason, it is not that slow with Qt 4.8.1.
Caches are introduced for the three following methods
* width(doctring), controlled by CACHE_METRICS_WIDTH. This cache already
existed, but the code has been cleaned up
* getTextLayout, controlled by CACHE_METRICS_QTEXTLAYOUT (disabled by
default on Qt5, which does its own caching). This is used for pos2x
and x2pos and now for drawing of text too. The previous code used a
trivial caching scheme of the last used QTextLayout, but now they
are properly kept in a QCache. Moreover, the cacheEnabled() property
is enabled for these QTextLayout object (not sure what this does).
* breakAt, controlled by CACHE_METRICS_BREAKAT. This is the only user
of QTextLayout which did not have some kind of caching already.
For some weird reasons related to Argument-dependent look-up, the
qHash(docstring) function has to be defined in std namespace, since
lyx::docstring is actually std::basic_string<wchar_t>.
[NOTE: this version has profiling hooks, enabled by commenting out the line
#define DISABLE_PMPROF
that should eventually be removed.]
The xfrac package is the "state of the art" for "split-level" (nice) fractions.
Character replacements look consistent, scale properly and fit in the line.
Fixes#5220.
A dot in the <lang><side><times> string means: keep current value.
This expert feature allows to change arbitrary quote features in one step.
E.g.,
inset-forall Quotes inset-modify changetype f..
=> change all quote insets to French style, maintaining current side
and times setting
inset-forall Quotes inset-modify changetype ..s
=> change all quote insets to single quotes, keeping style and times
inset-forall Quotes inset-modify changetype g.s
=> change all quote insets to German single quotes, keeping left/right
setting
Any idea where to document this?
All typographic quotation marks are supported, if the proper
LaTeX macros (as opposed to ligatures) are used.
So no need for forcing straight quotes.
This is in line with what babel-hebrew suggests.
* Adjoining closing Single + double quote becomes double + single quote
(for English, Swedish and German, LaTeX export as ''').
* French double quotes are converted to << >> in the LaTeX file and to
double inverted question/interrogation marks in the output, if the font
encoding is set to [None] or OT1 but the global default is T1. (test
for lyxrc.fontenc instead of the document-specific fontenc setting in
InsetQuotes.cpp).
* Quote type ignored for LyXHTML: always "English" quotes used.
See #10451
