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This patch adds domain and data type information to each row of the
attribute search menu. The data type is displayed on the right, just
like how the list is exposed for the existing point cloud and hair
attribute panels. The domain is exposed on the left like the menu
hierarchy from menu search.
For the implementation, the attribute hint information is stored as a
set instead of a multi-value map so that every item (which we need to
point to descretely in the search process) contains the necessary data
type and domain information by itself. We also need to allocate a new
struct for every button, which requires a change to allow passing a
newly allocated argument to search buttons.
Note that the search does't yet handle the case where there are two
attributes with the same name but different domains or data types in
the input geometry set. That will be handled as a separate improvement.
Differential Revision: https://developer.blender.org/D10623
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The information is not exposed in the attribute search yet.
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The check for a null active object was after trying to retrieve the active
modifier from the object.
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Since the same node tree can be used in modifiers on different objects,
there can be multiple threads writing to the maps in the node tree UI
storage at the same time. The additions for attribute name hints and
error messages made it so this would often cause a crash or at least
an ASAN report. This patch adds locks to prevent multiple threads
from using the maps concurrently.
In a brief test I actually didn't observe a crash without the global
`bNodeTree` UI storage mutex, but I think it's necessary for the change
to be correct, and I did notice some unfreed memory without it anyway.
Ideally it would be in a node tree runtime struct though.
Differential Revision: https://developer.blender.org/D10577
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"ensure" makes more sense in this case because the function actually
adds an item to the map if one doesn't exist yet.
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This information will be used by the attribute search in string sockets.
Ref T85657.
Differential Revision: https://developer.blender.org/D10462
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This function will be used in another file with attribute search,
so it makes sense to share from the UI storage header.
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This function will be used by multiple functions.
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This makes it easier to use the api.
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This patch adds icons to the right side of nodes when they encounter a
a problem. When hovered, a tooltip displays describing the encountered
while evaluating the node.
Some examples are: attribute doesn't exist, mesh has no faces,
incorrect attribute type, etc. Exposing more messages to the system
will be an ongoing process. Multiple warnings per node are supported.
The system is implemented somewhat generically so that the basic
structure can also be used to store more information from evaluation
for the interface, like a list of available attributes.
Currently the messages are just button tooltips. They could be styled
differently in the future. Another limitation is that every instance of
a node group in a parent node tree will have the same error messages,
the "evaluation context" used to decide when to display the tooltips
must be extended to support node tree paths.
Differential Revision: https://developer.blender.org/D10290
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