In 022045ae05 a regression was introduced: if no *slideshowAPI*
is specified in the branding file, Calamares refuses to start, with
a YAML failure.
Before the refactoring, we had `YAML::Node doc` and looked up
the *slideshowAPI* in it with `doc["slideshowAPI"]`. After the
refactoring, we had `const YAML::Node& doc`. The `const` makes
all the difference:
- subscripting a non-existent key in a mutable Node silently
returns a Null node (and possibly inserts the key);
- subscripting a non-existent key in a const Node returns an
invalid or undefined node.
Calling IsNull() or IsScalar() on a Null node works: the functions
return a bool. Calling them on an invalid node throws an exception.
So in the **const** case, this code can throws an exception that it
doesn't in the non-const case:
`doc[ "slideshowAPI" ].IsScalar()`
- Massage the code to check for validity before checking for scalar
- Add a `get()` that produces more useful exception types when
looking up an invalid key
- Use `get()` to lookup the slideshow node just once.
- Add access to the panel-sides membe of the view manager, and
calculate which sides are populated by panels (if any).
- Pass the calculated panel-sides to the view manager before it
starts adding viewpages, so they get consistent margins.
- All the headers go to relevant subdirs, but we don't keep
libcalamares and libcalamaresui apart.
- While here, remove unused variable from libcalamares CMake
- link the library privately -- the public API uses QVariantMap
- install FindYAMLCPP just in case
- add yamlcpp explicitly in the few places that really need it
(e.g. netinstall testing the parsing of netinstall.yaml)
- Add the Calamares CMake-modules to the search path automatically
- Export to CalamaresTargets.cmake and use namespace Calamares::
- Document imported targets
- Find Qt, because the translations machinery will need macros from that
- The installed lib links to IMPORTED libraries from KF5, so we need
to find them (again) as well.
- When loading QML V2, both loadQmlV2Complete() and changeSlideShowState()
lock the same mutex, introduced in e7f4479df1.
- Explicitly unlock when loading is done and we need to change the state
immediately.
- For testing purposes, it's useful to load a module externally
and then register it to the ModuleManager (this hands off ownership).
- Refactor overall module loading to use the exposed single-module method.
- QML files need to be searched in specific places; this was initialized
by Calamares, but not for the text application. Move initialization
into the library.
- Previously, unless setDefaultFontSize() was called explicitly,
the default size would be 0, leading to unexpected and weird
displays (and a warning on stderr).
- If setDefaultFontSize() is not called, get a sensible size instead
(like defaultFontHeight() was already trying to do).
- It is the requirements model (checking) that reports progress, and now
the model is accessible (ask for it with requirementsModel(), make the
messages come from there.
- The architecture of letting someone build up a list of requirements
from data emitted by the ModuleManager is broken: if it gets loaded
later, it will miss data; passing around complicated objects is
no fun anyway. Get rid of it, on the way to "ModuleManager has
its own model of requirements".
- Give the ModuleManager a RequirementsModel -- that is the source
of truth about the module-requirements of the modules managed
by that particular ModuleManager.
- Let the RequirementsChecker operate on a given RequirementsModel.
