- add second query field to logging datasource query component
- second field manages search term, first field manages stream selectors
- improved logging cheat sheet to get started
- Queries in Explore have been string based
- This PR introduces the use of the DataQuery type to denote all queries handled in Explore
- Within Explore all handling of DataQueries is transparent
- Modifying DataQueries is left to the datasource
- Using `target` as variable names for DataQueries to be consistent with the rest of Grafana
- when instantiating a datasource, the datasource service checks if the
plugin module exports Explore components, and if so, attaches them to
the datasource
- Explore component makes all major internal pluggable from a datasource
`exploreComponents` property
- Moved Prometheus query field to promehteus datasource and registered
it as an exported Explore component
- Added new Start page for Explore, also exported from the datasource
Implements rudimentary support for placeholder values inside a string
with the `PlaceholdersBuffer` class. The latter helps the newly added
sum aggregation query suggestion to automatically focus on the label
so users can easily choose from the available typeahead options.
Related: #13615
In short, the underlying problem appears to be the `onChange()` handler
being triggered after handling the blur event. Since the contents have
not actually changed this forces the typeahead state to reset which
undesirably puts a stop to propagating the selected suggestion back up
to get set.
Related: #13604
These changes were originally intended to address a bug whereby a
suggestion for an already selected label value continues to appear.
However, they also appear to fix several other problems in the area:
- Wrong suggestions when using negated label matching operators
- Misaligned label value suggestion replacements
Related: #13484
- use react-highlight-words
- add highlighting (color and border) to the matching substring of the
suggested items in the typeahead
- extracted match finding from logging datasource
- created new utils/text.ts class for text-related functions
- added more types
- some syntax rules are loaded asynchronously
- when they have been received, the query field needs to re-render
- trigger re-render via bogus edit (tried other methods but could not
find any)
