* src/TextClass{cpp,h}:
- implement Requires tag for class and InsetLayout.
* src/Layout.{cpp,h}:
- implement Requires tag for layouts.
- increase layouts format to 6.
* src/Paragraph.cpp:
- request required features for paragraph layouts.
* src/LaTeXFeatures.cpp:
- add some packages needed by modules.
- remove Preamble method for InsetLayout. This is now done
in InsetFlex::validate.
* src/BufferParams.cpp (validate):
- request required features for the class.
* src/insets/InsetLayout.h:
- new member "requires".
* src/insets/InsetFlex.{cpp,h}:
- implement validate method and request required features and preamble snippets.
* lib/layouts/*.{layout,module,inc}:
- increase layouts format to 6.
- use Requires tags in some modules (more can be done later).
* lib/doc/Customization.lyx:
- document Requires tag.
git-svn-id: svn://svn.lyx.org/lyx/lyx-devel/trunk@22414 a592a061-630c-0410-9148-cb99ea01b6c8
* src/LaTeXFeatures.C (mustProvide): new method; returns true when
isRequired is true and the feature is not provided by the
textclass.
(getPackages, getLyXSGMLEntities): use mustProvide when relevant.
* src/bufferparams.C (getEngine):
* src/buffer.C (validate): adapt to change below.
* src/lyxtextclass.C (read): replace tags ProvidesNatbib,
ProvidesMakeidx, ProvidesUrl and ProvidesAmsmath by a generic
"Provides".
(provides): take a string as argument.
* lib/scripts/layout2layout.py (convert): convert "ProvidesXxx" tags
to "Provides xxx".
* lib/layouts/*: update to format 4.
git-svn-id: svn://svn.lyx.org/lyx/lyx-devel/trunk@17740 a592a061-630c-0410-9148-cb99ea01b6c8
