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config/output: Refactor handling of tiered configs

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Output configuration can be applied to a particular output in three
ways: As a wildcard, by connector name and by identifier. This in turn
means that three different configurations must be handled at any given
time.

In the current model, this is managed by merging new configuration into
every other matching configuration. At the same time, an additional
synthetic configuration is made which matchehes both identifier and name
at the same time, further complicating logic.

Instead, manage and store each configuration independently and merge
them in order when retrieving configuration for an output. When changes
are made to a less specific configuration, clear these fields from more
specific configurations to allow the change to take effect regardless of
precedence.

Fixes: https://github.com/swaywm/sway/issues/8048
This commit is contained in:
Kenny Levinsen 2024-03-16 17:55:20 +01:00 • committed by Simon Ser
parent bc258a3be2
commit 1267e47de9
2 changed files with 142 additions and 161 deletions
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9
include/sway/config.h
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@ -693,7 +693,14 @@ bool apply_output_configs(struct matched_output_config *configs,
void apply_all_output_configs(void);
struct output_config *store_output_config(struct output_config *oc);
/**
* store_output_config stores a new output config. An output may be matched by
* three different config types, in order of precedence: Identifier, name and
* wildcard. When storing a config type of lower precedence, assume that the
* user wants the config to take immediate effect by superseding (clearing) the
* same values from higher presedence configuration.
*/
void store_output_config(struct output_config *oc);
struct output_config *find_output_config(struct sway_output *output);