This is a follow-up of bug #8967. The implementation is self-explaining, the
only part which needs a comment is lyx2lyx: Since a 100% correct solution is
not possible, it has been decided not to switch amsmath off in the forward
conversion if no other ams command than \smash[t] and \smash[b] is used, but
to consider it a bug that older versions do not load amsmath automatically for
these commands. In the backward direction it is easy to keep the document
compilable, so just do that.
This method is a proxy for LyXRC::preview that forces to forward
declare some wrapper around an enum...
Instead, two simple static methods previewMath() and previewText() are
introduced, that make the code much easier to follow.
* remove unused class TexStream.
* remove unused virtual method Inset::cellXOffset
* remove second argument of FileDialog constructor, which was actually
not used
* remove some dead local code
* remove some unused private members of classes
* in InsetMathNest::updateBuffer, fix the logic of a test
This was a regression of e86cdc40: A newly introduced member variable was
not initialized in the constructor, which made it quite random whether symbols
like \coloneqq where displayed correctly or as an empty edit box.
This extends the already existing math symbol fallback mechanism in two ways:
1) When considering the availability of the math font, also take broken
code points into account. These are currently 0x0009 and 0x00ad, depending
on the platform.
2) If the fallback symbol in the standard "Symbol" font is not given, or if
the "Symbol" font is not available, or the fallback symbol is one of the
broken ones, try to use a generic unicode symbol as second fallback instead.
If this is available, we rely on Qt to find a font which has it. Only if
this is not available, display the symbol as ERT.
This ensures that we do never get a symbol which is not displayed: Either
it can be displayed, with or without fallback, or it will be shown as ERT.
The math parser aborts with an error message on \begin{align} and
\begin{align*} if this is not the hull inset. This is now fixed, however
this is not complete support for these two environments (the GUI does not
respect the numbering). It is only the minimal fix that ensures that no data
loss occurs for documents imported by tex2lyx.
This comes from trying to run tex2lyx on the AMS math test document
testmath.tex. Both \(...\) and \begin{math}...\end{math} are defined as
inline math formulas in standard LaTeX. tex2lyx recognizes this, but the
math parser in LyX did not handle "\begin_inset Formula \(" and
"\begin_inset Formula \begin{math}" correctly.
The fix is simple and safe: If we are in undecided mode (this is only true
for the first token of a math inset), create a hull inset of the respective
kind. Otherwise, handle the commands as before.
This avoids a message "Deco was not found. Programming error?" on stderr.
The added decorations are defined by amsmath, and equivalent to \vert (single
vertical bar) and \Vert (double vertical bar), respectively. They are used to
distinguish the single and paired versions (for use with \left and \right).
These symbols should cause amsmath to be loaded, but this would be too
dangerous to implement now.
Now interactive insertion of \smash[t] and \smash[b] is possible again.
\smash with optional argument behaves now exactly as in LyX 2.0.x, and without
optional argument it is supported by InsetMathPhantom.
When adding native support for \smash in 18779013 I overlooked that amsmath
redefines \smash to take an optional argument t or b. These optional
arguments are not parsed correctly anymore (bug 8967). This change fixes
the regression, so that \smash with optional argument appears in red, as it
was before th introduction of the native smash inset.
In the future, we should have native support for \smash[t] and \smash[b]
as well, but this would be a file format change (automatic amsmath loading),
and it is too late for 2.1.0.
When we export the file to latex, we use the redefinition_ variable to check whether we should output newcommand or renewcommand. This variable was set by the MathMacroTemplate::metrics() function, and this caused problem when the export is running in a different thread as the GUI.
In general, the metrics() functions should not change the Buffer; we have updateBuffer/updateMacros for that purpose.
Not all accessors did update the data previously. Therefore it could happen
that document export from the command line would output \newcommand, and from
GUI it would output \renewcommand for the same macro, simply because in the
GUI case the data was updated as a side effect of the GUI thread reading some
other member.
I also removed the mutable flag for requires_, since this member is always
set on construction and does not need any lazy update.
This is mostly unused private class members.
There are also a few unused functions that got #if'ed out. I never know in this case whether the code should be nuked.
