Add support for more advanced forms of overriding
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Dermot Duffy
+150
-23
@@ -1,39 +1,166 @@
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# `overrides`
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Various parts of card configuration may [conditionally](conditions.md) be
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overridden (e.g. to hide the menu in fullscreen mode).
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The card configuration may [conditionally](conditions.md) be overridden (e.g. to
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hide the menu in fullscreen mode).
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```yaml
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overrides:
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- conditions:
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[condition]
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overrides:
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[override]
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[...]
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```
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Not all configuration parameters are overriddable, some because it doesn't make
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sense for that parameter to vary, and many because of the extra complexity of
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supporting overriding given the lack of compelling usecases ([please request new
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overridable parameters
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here!](https://github.com/dermotduffy/frigate-hass-card/issues/new/choose)).
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!> Whilst all configuration parameters are theoretically overridable, in some instances a configuration variable may only be consulted on startup or changing its value may negatively impact behavior -- override results may vary!
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Each entry under the top-level `overrides` configuration block should be a list
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item, that has both of the following parameters set:
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The top-level `overrides` configuration block expects a list, with each list
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item containing `conditions` and at least one of `merge`, `delete` or `set` specified.
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| Option | Default | Description |
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| - | - | - |
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| `conditions` | | A list of [conditions](conditions.md) that must evaluate to `true` in order for the overrides to be applied. |
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| `overrides` | | Configuration overrides to be applied. Any configuration parameter matching [Overrideable parameters](overrides.md?id=overrideable-parameters) can be overridden. |
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| `delete` | | An array of configuration paths to delete. See below. |
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| `merge` | | A dictionary of configuration paths to merge. See below. |
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| `set` | | A dictionary of configuration paths to set. See below. |
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## Overrideable parameters
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## Configuration Paths
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| Configuration Key | Overrideable |
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| - | - |
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| [`cameras.*`](cameras/README.md) | :white_check_mark: |
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| [`cameras_global.*`](cameras/README.md) | :white_check_mark: |
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| [`dimensions.*`](dimensions.md) | :white_check_mark: |
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| [`image.*`](image.md) | :white_check_mark: |
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| [`live.controls.*`](live.md?id=controls), [`live.display.*`](live.md?id=display), [`live.microphone.*`](live.md?id=microphone), [`live.show_image_during_load`](live.md), [`live.zoomable`](live.md) | :white_check_mark: |
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| [`menu.*`](menu.md) | :white_check_mark: |
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| [`view.*`](view.md) | :white_check_mark: |
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| *(Everything else)* | :heavy_multiplication_x: |
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The `delete`, `merge` and `set` parameters take configuration paths. Paths are dot-separated references to particular configuration parameters. To refer to list elements use `[n]` notation.
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For example the path `cameras[1].dimensions.aspect_ratio` refers to the `aspect_ratio` parameter below:
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```yaml
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cameras:
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- camera_entity: camera.other
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- camera_entity: camera.relevant
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dimensions:
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aspect_ratio: '16:9'
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```
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## `delete`
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An array of configuration paths to delete.
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```yaml
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overrides:
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- conditions:
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[condition]
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delete:
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- [path_1]
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- [path_2]
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```
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### Examples
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Delete the 2nd camera:
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```yaml
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overrides:
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- conditions:
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[condition]
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delete:
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'cameras[2]'
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```
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Delete the menu style parameter, thus falling back to the default:
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```yaml
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overrides:
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- conditions:
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[condition]
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delete:
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'menu.style'
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```
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## `merge`
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Specifies an object to recursively merge into existing configuration.
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| Option | Default | Description |
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| - | - | - |
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| [configuration path] | | Arbitrary configuration object to merge. Must be an object (i.e. not a literal value). |
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### Examples
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Hide the menu when a given condition is met:
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```yaml
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overrides:
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- conditions:
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[condition]
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merge:
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menu: {
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style: 'hidden'
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}
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```
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Enable thumbnails below the `live` feed:
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```yaml
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overrides:
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- conditions:
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[condition]
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merge:
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'live.controls.thumbnails': {
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mode: 'below'
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}
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```
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Also enables thumbnails below the `live` feed, but without using the dot-separated notation:
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```yaml
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overrides:
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- conditions:
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[condition]
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merge:
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live: {
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controls: {
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thumbnails: {
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mode: 'below'
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}
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}
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}
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```
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## `set`
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Specifies a value to set in the configuration. This differs from `merge` in that the existing value is entirely replaced.
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| Option | Default | Description |
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| - | - | - |
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| [configuration path] | | Arbitrary configuration value / object / list to set. |
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### Examples
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Set the entire menu configuration to defaults with the exception of the `style` which is set to `overlay`.
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```yaml
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overrides:
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- conditions:
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[condition]
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set:
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menu: {
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style: 'overlay'
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}
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```
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Set the menu style but without touching the other `menu` parameters:
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```yaml
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overrides:
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- conditions:
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[condition]
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set:
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'menu.style': 'overlay'
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```
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That is equivalent to merging the following:
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```yaml
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overrides:
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- conditions:
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[condition]
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merge:
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menu: {
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style: 'overlay'
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}
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```
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