Refactor image block's image editing tools into separate components.

[talldan]

Description

While trying to come up with a solution to #24676, I found the image editing tools could be modularised more.

There's some really great functionality, but the UI is all in a single component that replaces almost the entire image block's UI when active:
https://github.com/WordPress/gutenberg/blob/master/packages/block-library/src/image/image-editor.js

One of the things I wanted to try is rendering the toolbar buttons in a dropdown. Dropdown has renderToggle and renderContent callback functions, and there's no way to easily have the 'Crop' button as a toggle and the various image editing components as the 'content'.

This breaks up the single component into multiple components/hooks:

• ImageEditingProvider is a provider that should wrap all the image editing components, it holds the state for the edits.
• useImageEditingContext is a hook that allows an individual component to access values like 'position', 'aspect' from context as well as functions for modifying those values like 'setPosition', 'setAspect'.
• AspectRatioDropdown
• RotationButton
• ImageCropper
• ZoomDropdown.

How has this been tested?

Some e2e tests have been added in a separate PR (#27262).

Manual testing also recommended.

Screenshots

Types of changes

Refactor

Checklist:

• My code is tested.
• My code follows the WordPress code style.
• My code follows the accessibility standards.
• My code has proper inline documentation.
• I've included developer documentation if appropriate.
• I've updated all React Native files affected by any refactorings/renamings in this PR.

[github-actions]

Size Change: +665 B (0%)

Total Size: 1.19 MB

Filename	Size	Change
build/block-library/index.js	149 kB	+665 B (0%)

ℹ️ View Unchanged

Filename	Size	Change
build/a11y/index.js	1.14 kB	0 B
build/annotations/index.js	3.8 kB	0 B
build/api-fetch/index.js	3.42 kB	0 B
build/autop/index.js	2.84 kB	0 B
build/blob/index.js	665 B	0 B
build/block-directory/index.js	8.72 kB	0 B
build/block-directory/style-rtl.css	943 B	0 B
build/block-directory/style.css	942 B	0 B
build/block-editor/index.js	128 kB	0 B
build/block-editor/style-rtl.css	11.2 kB	0 B
build/block-editor/style.css	11.2 kB	0 B
build/block-library/editor-rtl.css	8.95 kB	0 B
build/block-library/editor.css	8.95 kB	0 B
build/block-library/style-rtl.css	8.27 kB	0 B
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build/block-library/theme-rtl.css	789 B	0 B
build/block-library/theme.css	790 B	0 B
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build/compose/index.js	9.95 kB	0 B
build/core-data/index.js	14.8 kB	0 B
build/data-controls/index.js	828 B	0 B
build/data/index.js	8.98 kB	0 B
build/date/index.js	11.2 kB	0 B
build/deprecated/index.js	769 B	0 B
build/dom-ready/index.js	571 B	0 B
build/dom/index.js	4.95 kB	0 B
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build/edit-navigation/style-rtl.css	881 B	0 B
build/edit-navigation/style.css	885 B	0 B
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build/edit-post/style-rtl.css	6.42 kB	0 B
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build/edit-site/style.css	3.91 kB	0 B
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build/edit-widgets/style.css	3.13 kB	0 B
build/editor/editor-styles-rtl.css	476 B	0 B
build/editor/editor-styles.css	478 B	0 B
build/editor/index.js	43.3 kB	0 B
build/editor/style-rtl.css	3.85 kB	0 B
build/editor/style.css	3.85 kB	0 B
build/element/index.js	4.62 kB	0 B
build/escape-html/index.js	735 B	0 B
build/format-library/index.js	6.86 kB	0 B
build/format-library/style-rtl.css	547 B	0 B
build/format-library/style.css	548 B	0 B
build/hooks/index.js	2.27 kB	0 B
build/html-entities/index.js	622 B	0 B
build/i18n/index.js	3.57 kB	0 B
build/is-shallow-equal/index.js	698 B	0 B
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build/keycodes/index.js	1.94 kB	0 B
build/list-reusable-blocks/index.js	3.1 kB	0 B
build/list-reusable-blocks/style-rtl.css	476 B	0 B
build/list-reusable-blocks/style.css	476 B	0 B
build/media-utils/index.js	5.32 kB	0 B
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build/nux/index.js	3.42 kB	0 B
build/nux/style-rtl.css	671 B	0 B
build/nux/style.css	668 B	0 B
build/plugins/index.js	2.56 kB	0 B
build/primitives/index.js	1.43 kB	0 B
build/priority-queue/index.js	790 B	0 B
build/redux-routine/index.js	2.84 kB	0 B
build/reusable-blocks/index.js	2.92 kB	0 B
build/rich-text/index.js	13.4 kB	0 B
build/server-side-render/index.js	2.77 kB	0 B
build/shortcode/index.js	1.69 kB	0 B
build/token-list/index.js	1.27 kB	0 B
build/url/index.js	4.06 kB	0 B
build/viewport/index.js	1.86 kB	0 B
build/warning/index.js	1.14 kB	0 B
build/wordcount/index.js	1.22 kB	0 B

_{compressed-size-action}

[draganescu]

I have done extensive manual testing to the image block on this branch and found no problems.

[draganescu]

The refactoring introduced no new bugs in my testing and the refactored code adds a bit more clarity (e.g. rotateClockwise instead of rotate, the separate hooks for saving and transforming etc.).

@talldan

[talldan]

Thanks @draganescu!