Style plugin-aware useInspectorInfo (#6655)

## Problem
`useInspectorInfo`, a widely used helper in the inspector, cannot read
element styles set by Tailwind

## Fix
The fix is made up from multiple pieces:
- I extended `StylePlugin` with a new function,
`readStyleFromElementProps`, which reads a given style info key from the
`JSXAttributes` passed to it. I updated both `InlineStylePlugin` and
`TailwindStylePlugin` to support this function, and updated all affected
tests. This change was originally prototyped on the
[Megaspike](#6574)
- I updated `useGetMultiselectedProps` to use
`StylePlugin.readStyleFromElementProps` when a style prop is read.
- I updated `CSSStylePropertyNotParsable` and `ParsedCSSStyleProperty`
to preserve the original value read from `projectContents`, in addition
to the parsed representation. This way, `CSSStyleProperties` can be used
by code that expect to work with this lower-level representation (such
as the internals of `useInspectorInfo`)
- I updated the `SET_PROP` and `UNSET_PROP` actions to use the
`setProperty` and `deleteProperty` commands under the hood. This way,
any editor code using these actions will be able to use the style
plugins to write element style. This change was originally prototyped on
the [Megaspike](#6574)

### Out of scope
This change only touches `useGetMultiselectedProps` from the internals
of `useInspectorInfo`. `useGetSpiedProps` is left unchanged, since the
values element style props set through Tailwind don't show up in
`allElementProps` (which is the data source for spied props)

## Manual Tests:
I hereby swear that:

- [x] I opened a hydrogen project and it loaded
- [x] I could navigate to various routes in Play mode

editor/src/components/canvas/canvas-types.ts

@@ -1,4 +1,5 @@
 import type { ReactElement } from 'react'
+import type { JSExpression, PartOfJSXAttributeValue } from '../../core/shared/element-template'
 import { ElementInstanceMetadataMap } from '../../core/shared/element-template'
 import type { PropertyPath, ElementPath } from '../../core/shared/project-file-types'
 import type { KeysPressed } from '../../utils/keyboard'
@@ -543,11 +544,13 @@ interface CSSStylePropertyNotFound {
 
 interface CSSStylePropertyNotParsable {
   type: 'not-parsable'
+  originalValue: JSExpression | PartOfJSXAttributeValue
 }
 
 interface ParsedCSSStyleProperty<T> {
   type: 'property'
   tags: PropertyTag[]
+  propertyValue: JSExpression | PartOfJSXAttributeValue
   value: T
 }
 
@@ -560,12 +563,17 @@ export function cssStylePropertyNotFound(): CSSStylePropertyNotFound {
   return { type: 'not-found' }
 }
 
-export function cssStylePropertyNotParsable(): CSSStylePropertyNotParsable {
-  return { type: 'not-parsable' }
+export function cssStylePropertyNotParsable(
+  originalValue: JSExpression | PartOfJSXAttributeValue,
+): CSSStylePropertyNotParsable {
+  return { type: 'not-parsable', originalValue: originalValue }
 }
 
-export function cssStyleProperty<T>(value: T): ParsedCSSStyleProperty<T> {
-  return { type: 'property', tags: [], value: value }
+export function cssStyleProperty<T>(
+  value: T,
+  propertyValue: JSExpression | PartOfJSXAttributeValue,
+): ParsedCSSStyleProperty<T> {
+  return { type: 'property', tags: [], value: value, propertyValue: propertyValue }
 }
 
 export function maybePropertyValue<T>(property: CSSStyleProperty<T>): T | null {

editor/src/components/canvas/commands/utils/property-utils.ts

@@ -7,7 +7,7 @@ import { modifyUnderlyingElementForOpenFile } from '../../../editor/store/editor
 import { patchParseSuccessAtElementPath } from '../patch-utils'
 import type { CSSNumber } from '../../../inspector/common/css-utils'
 import { isCSSNumber } from '../../../inspector/common/css-utils'
-import { type StyleInfo, isStyleInfoKey } from '../../canvas-types'
+import type { StyleInfo } from '../../canvas-types'
 
 export interface EditorStateWithPatch {
   editorStateWithChanges: EditorState

editor/src/components/canvas/plugins/inline-style-plugin.spec.ts

@@ -1,10 +1,6 @@
 import * as EP from '../../../core/shared/element-path'
 import { cssNumber } from '../../inspector/common/css-utils'
-import {
-  cssStyleProperty,
-  cssStylePropertyNotFound,
-  cssStylePropertyNotParsable,
-} from '../canvas-types'
+import { cssStylePropertyNotFound } from '../canvas-types'
 import type { EditorRenderResult } from '../ui-jsx.test-utils'
 import { renderTestEditorWithCode } from '../ui-jsx.test-utils'
 import { InlineStylePlugin } from './inline-style-plugin'
@@ -45,8 +41,18 @@ export var storyboard = (
 
     expect(styleInfo).not.toBeNull()
     const { flexDirection, gap } = styleInfo!
-    expect(flexDirection).toEqual(cssStyleProperty('column'))
-    expect(gap).toEqual(cssStyleProperty(cssNumber(2, 'rem')))
+    expect(flexDirection).toMatchObject({
+      type: 'property',
+      tags: [],
+      value: 'column',
+      propertyValue: { value: 'column' },
+    })
+    expect(gap).toMatchObject({
+      type: 'property',
+      tags: [],
+      value: cssNumber(2, 'rem'),
+      propertyValue: { value: '2rem' },
+    })
   })
 
   it('can parse style info with missing/unparsable props', async () => {
@@ -88,7 +94,14 @@ export var storyboard = (
     expect(styleInfo).not.toBeNull()
     const { flexDirection, gap } = styleInfo!
     expect(flexDirection).toEqual(cssStylePropertyNotFound())
-    expect(gap).toEqual(cssStylePropertyNotParsable())
+    expect(gap).toMatchObject({
+      type: 'not-parsable',
+      originalValue: {
+        type: 'JS_PROPERTY_ACCESS',
+        onValue: { type: 'JS_IDENTIFIER', name: 'gap' },
+        property: 'small',
+      },
+    })
   })
 })
 

editor/src/components/canvas/plugins/inline-style-plugin.ts

@@ -1,5 +1,4 @@
 import type { JSXAttributes, PropertyPath } from 'utopia-shared/src/types'
-import type { StyleLayoutProp } from '../../../core/layout/layout-helpers-new'
 import * as Either from '../../../core/shared/either'
 import {
   getJSXAttributesAtPath,
@@ -9,7 +8,7 @@ import type { ModifiableAttribute } from '../../../core/shared/jsx-attributes'
 import { getJSXElementFromProjectContents } from '../../editor/store/editor-state'
 import { cssParsers, type ParsedCSSProperties } from '../../inspector/common/css-utils'
 import { stylePropPathMappingFn } from '../../inspector/common/property-path-hooks'
-import type { CSSStyleProperty } from '../canvas-types'
+import type { CSSStyleProperty, StyleInfo } from '../canvas-types'
 import {
   cssStyleProperty,
   cssStylePropertyNotParsable,
@@ -29,7 +28,7 @@ function getPropValue(attributes: JSXAttributes, path: PropertyPath): Modifiable
   return result.attribute
 }
 
-function getPropertyFromInstance<P extends StyleLayoutProp, T = ParsedCSSProperties[P]>(
+function getPropertyFromInstance<P extends keyof StyleInfo, T = ParsedCSSProperties[P]>(
   prop: P,
   attributes: JSXAttributes,
 ): CSSStyleProperty<NonNullable<T>> | null {
@@ -39,18 +38,24 @@ function getPropertyFromInstance<P extends StyleLayoutProp, T = ParsedCSSPropert
   }
   const simpleValue = jsxSimpleAttributeToValue(attribute)
   if (Either.isLeft(simpleValue)) {
-    return cssStylePropertyNotParsable()
+    return cssStylePropertyNotParsable(attribute)
   }
   const parser = cssParsers[prop] as (value: unknown) => Either.Either<string, T>
   const parsed = parser(simpleValue.value)
   if (Either.isLeft(parsed) || parsed.value == null) {
-    return cssStylePropertyNotParsable()
+    return cssStylePropertyNotParsable(attribute)
   }
-  return cssStyleProperty(parsed.value)
+  return cssStyleProperty(parsed.value, attribute)
 }
 
 export const InlineStylePlugin: StylePlugin = {
   name: 'Inline Style',
+  readStyleFromElementProps: <T extends keyof StyleInfo>(
+    attributes: JSXAttributes,
+    prop: T,
+  ): CSSStyleProperty<NonNullable<ParsedCSSProperties[T]>> | null => {
+    return getPropertyFromInstance(prop, attributes)
+  },
   styleInfoFactory:
     ({ projectContents }) =>
     (elementPath) => {

editor/src/components/canvas/plugins/style-plugins.ts

@@ -1,4 +1,4 @@
-import type { ElementPath } from 'utopia-shared/src/types'
+import type { ElementPath, JSXAttributes } from 'utopia-shared/src/types'
 import type { EditorState, EditorStatePatch } from '../../editor/store/editor-state'
 import type {
   InteractionLifecycle,
@@ -18,7 +18,9 @@ import type { EditorStateWithPatch } from '../commands/utils/property-utils'
 import { applyValuesAtPath } from '../commands/utils/property-utils'
 import * as PP from '../../../core/shared/property-path'
 import { emptyComments, jsExpressionValue } from '../../../core/shared/element-template'
+import type { CSSStyleProperty } from '../canvas-types'
 import { isStyleInfoKey, type StyleInfo } from '../canvas-types'
+import type { ParsedCSSProperties } from '../../inspector/common/css-utils'
 
 export interface UpdateCSSProp {
   type: 'set'
@@ -51,6 +53,10 @@ export type StyleUpdate = UpdateCSSProp | DeleteCSSProp
 export interface StylePlugin {
   name: string
   styleInfoFactory: StyleInfoFactory
+  readStyleFromElementProps: <T extends keyof StyleInfo>(
+    attributes: JSXAttributes,
+    prop: T,
+  ) => CSSStyleProperty<NonNullable<ParsedCSSProperties[T]>> | null
   updateStyles: (
     editorState: EditorState,
     elementPath: ElementPath,

editor/src/components/canvas/plugins/tailwind-style-plugin.ts

@@ -1,25 +1,33 @@
 import * as TailwindClassParser from '@xengine/tailwindcss-class-parser'
-import { isLeft } from '../../../core/shared/either'
+import { defaultEither, flatMapEither, isLeft } from '../../../core/shared/either'
 import { getClassNameAttribute } from '../../../core/tailwind/tailwind-options'
 import { getElementFromProjectContents } from '../../editor/store/editor-state'
-import type { Parser } from '../../inspector/common/css-utils'
+import type { ParsedCSSProperties, Parser } from '../../inspector/common/css-utils'
 import { cssParsers } from '../../inspector/common/css-utils'
 import { mapDropNulls } from '../../../core/shared/array-utils'
 import type { StylePlugin } from './style-plugins'
 import type { Config } from 'tailwindcss/types/config'
-import { cssStyleProperty, type CSSStyleProperty } from '../canvas-types'
+import type { StyleInfo } from '../canvas-types'
+import { cssStyleProperty, isStyleInfoKey, type CSSStyleProperty } from '../canvas-types'
 import * as UCL from './tailwind-style-plugin-utils/update-class-list'
 import { assertNever } from '../../../core/shared/utils'
+import {
+  jsxSimpleAttributeToValue,
+  getModifiableJSXAttributeAtPath,
+} from '../../../core/shared/jsx-attribute-utils'
+import { emptyComments, type JSXAttributes } from 'utopia-shared/src/types'
+import * as PP from '../../../core/shared/property-path'
+import { jsExpressionValue } from '../../../core/shared/element-template'
 
-function parseTailwindProperty<T>(
-  value: unknown,
-  parse: Parser<T>,
-): CSSStyleProperty<NonNullable<T>> | null {
-  const parsed = parse(value, null)
+function parseTailwindProperty<T extends keyof StyleInfo>(
+  value: string | number | undefined,
+  prop: T,
+): CSSStyleProperty<NonNullable<ParsedCSSProperties[T]>> | null {
+  const parsed = cssParsers[prop](value, null)
   if (isLeft(parsed) || parsed.value == null) {
     return null
   }
-  return cssStyleProperty(parsed.value)
+  return cssStyleProperty(parsed.value, jsExpressionValue(value, emptyComments))
 }
 
 const TailwindPropertyMapping: Record<string, string> = {
@@ -81,6 +89,25 @@ const underscoresToSpaces = (s: string | undefined) => s?.replace(/[-_]/g, ' ')
 
 export const TailwindPlugin = (config: Config | null): StylePlugin => ({
   name: 'Tailwind',
+  readStyleFromElementProps: <P extends keyof StyleInfo>(
+    attributes: JSXAttributes,
+    prop: P,
+  ): CSSStyleProperty<NonNullable<ParsedCSSProperties[P]>> | null => {
+    const classNameAttribute = defaultEither(
+      null,
+      flatMapEither(
+        (attr) => jsxSimpleAttributeToValue(attr),
+        getModifiableJSXAttributeAtPath(attributes, PP.create('className')),
+      ),
+    )
+
+    if (typeof classNameAttribute !== 'string') {
+      return null
+    }
+
+    const mapping = getTailwindClassMapping(classNameAttribute.split(' '), config)
+    return parseTailwindProperty(mapping[TailwindPropertyMapping[prop]], prop)
+  },
   styleInfoFactory:
     ({ projectContents }) =>
     (elementPath) => {
@@ -95,56 +122,53 @@ export const TailwindPlugin = (config: Config | null): StylePlugin => ({
       const mapping = getTailwindClassMapping(classList.split(' '), config)
 
       return {
-        gap: parseTailwindProperty(mapping[TailwindPropertyMapping.gap], cssParsers.gap),
+        gap: parseTailwindProperty(mapping[TailwindPropertyMapping.gap], 'gap'),
         flexDirection: parseTailwindProperty(
           mapping[TailwindPropertyMapping.flexDirection],
-          cssParsers.flexDirection,
-        ),
-        left: parseTailwindProperty(mapping[TailwindPropertyMapping.left], cssParsers.left),
-        right: parseTailwindProperty(mapping[TailwindPropertyMapping.right], cssParsers.right),
-        top: parseTailwindProperty(mapping[TailwindPropertyMapping.top], cssParsers.top),
-        bottom: parseTailwindProperty(mapping[TailwindPropertyMapping.bottom], cssParsers.bottom),
-        width: parseTailwindProperty(mapping[TailwindPropertyMapping.width], cssParsers.width),
-        height: parseTailwindProperty(mapping[TailwindPropertyMapping.height], cssParsers.height),
-        flexBasis: parseTailwindProperty(
-          mapping[TailwindPropertyMapping.flexBasis],
-          cssParsers.flexBasis,
+          'flexDirection',
         ),
+        left: parseTailwindProperty(mapping[TailwindPropertyMapping.left], 'left'),
+        right: parseTailwindProperty(mapping[TailwindPropertyMapping.right], 'right'),
+        top: parseTailwindProperty(mapping[TailwindPropertyMapping.top], 'top'),
+        bottom: parseTailwindProperty(mapping[TailwindPropertyMapping.bottom], 'bottom'),
+        width: parseTailwindProperty(mapping[TailwindPropertyMapping.width], 'width'),
+        height: parseTailwindProperty(mapping[TailwindPropertyMapping.height], 'height'),
+        flexBasis: parseTailwindProperty(mapping[TailwindPropertyMapping.flexBasis], 'flexBasis'),
         padding: parseTailwindProperty(
           underscoresToSpaces(mapping[TailwindPropertyMapping.padding]),
-          cssParsers.padding,
+          'padding',
         ),
         paddingTop: parseTailwindProperty(
           mapping[TailwindPropertyMapping.paddingTop],
-          cssParsers.paddingTop,
+          'paddingTop',
         ),
         paddingRight: parseTailwindProperty(
           mapping[TailwindPropertyMapping.paddingRight],
-          cssParsers.paddingRight,
+          'paddingRight',
         ),
         paddingBottom: parseTailwindProperty(
           mapping[TailwindPropertyMapping.paddingBottom],
-          cssParsers.paddingBottom,
+          'paddingBottom',
         ),
         paddingLeft: parseTailwindProperty(
           mapping[TailwindPropertyMapping.paddingLeft],
-          cssParsers.paddingLeft,
+          'paddingLeft',
         ),
-        zIndex: parseTailwindProperty(mapping[TailwindPropertyMapping.zIndex], cssParsers.zIndex),
+        zIndex: parseTailwindProperty(mapping[TailwindPropertyMapping.zIndex], 'zIndex'),
       }
     },
   updateStyles: (editorState, elementPath, updates) => {
     const propsToDelete = mapDropNulls(
       (update) =>
-        update.type !== 'delete' || TailwindPropertyMapping[update.property] == null
+        update.type !== 'delete' || TailwindPropertyMapping[update.property] == null // TODO: make this type-safe
           ? null
           : UCL.remove(TailwindPropertyMapping[update.property]),
       updates,
     )
 
     const propsToSet = mapDropNulls(
       (update) =>
-        update.type !== 'set' || TailwindPropertyMapping[update.property] == null
+        update.type !== 'set' || TailwindPropertyMapping[update.property] == null // TODO: make this type-safe
           ? null
           : UCL.add({
               property: TailwindPropertyMapping[update.property],