POC Improve disabled editor contrast by letting Wonder Blocks own the disabled state

.changeset/shiny-dodos-eat.md

@@ -0,0 +1,2 @@
+---
+---

packages/perseus-editor/package.json

@@ -51,6 +51,7 @@
     "devDependencies": {
         "@khanacademy/mathjax-renderer": "catalog:devDeps",
         "@khanacademy/wonder-blocks-accordion": "catalog:devDeps",
+        "@khanacademy/wonder-blocks-badge": "catalog:devDeps",
         "@khanacademy/wonder-blocks-banner": "catalog:devDeps",
         "@khanacademy/wonder-blocks-button": "catalog:devDeps",
         "@khanacademy/wonder-blocks-clickable": "catalog:devDeps",
@@ -83,6 +84,7 @@
     "peerDependencies": {
         "@khanacademy/mathjax-renderer": "catalog:peerDeps",
         "@khanacademy/wonder-blocks-accordion": "catalog:peerDeps",
+        "@khanacademy/wonder-blocks-badge": "catalog:peerDeps",
         "@khanacademy/wonder-blocks-banner": "catalog:peerDeps",
         "@khanacademy/wonder-blocks-button": "catalog:peerDeps",
         "@khanacademy/wonder-blocks-clickable": "catalog:peerDeps",

packages/perseus-editor/src/components/coordinate-pair-input.tsx

@@ -14,14 +14,23 @@ type Props = {
     coord: [number, number];
     labels?: [string, string];
     error?: boolean;
+    disabled?: boolean;
     style?: StyleType;
     // TODO(LEMS-3995) simplifying styling after custom label work + change deprecated WonderBlocks component / aphrodite
     labelStyle?: StyleType;
     onChange: (newCoord: Coord) => void;
 };
 
 const CoordinatePairInput = (props: Props) => {
-    const {coord, labels, error, style, labelStyle, onChange} = props;
+    const {
+        coord,
+        labels,
+        error,
+        disabled = false,
+        style,
+        labelStyle,
+        onChange,
+    } = props;
 
     const xLabel = labels ? labels[0] : "x coord";
     const yLabel = labels ? labels[1] : "y coord";
@@ -71,6 +80,7 @@ const CoordinatePairInput = (props: Props) => {
                 <Strut size={spacing.xxSmall_6} />
                 <ScrolllessNumberTextField
                     value={coordState[0]}
+                    disabled={disabled}
                     onChange={(newValue) => handleCoordChange(newValue, 0)}
                     style={[
                         styles.textField,
@@ -91,6 +101,7 @@ const CoordinatePairInput = (props: Props) => {
                 <Strut size={spacing.xxSmall_6} />
                 <ScrolllessNumberTextField
                     value={coordState[1]}
+                    disabled={disabled}
                     onChange={(newValue) => handleCoordChange(newValue, 1)}
                     style={[
                         styles.textField,

packages/perseus-editor/src/components/segmented-control.tsx

@@ -0,0 +1,223 @@
+import Clickable from "@khanacademy/wonder-blocks-clickable";
+import {View} from "@khanacademy/wonder-blocks-core";
+import {
+    border,
+    font,
+    semanticColor,
+    sizing,
+} from "@khanacademy/wonder-blocks-tokens";
+import {StyleSheet} from "aphrodite";
+import * as React from "react";
+
+import type {StyleType} from "@khanacademy/wonder-blocks-core";
+
+/**
+ * A single selectable segment. Built on Wonder Blocks `Clickable` (the same
+ * primitive `Pill` uses) so it gets focus handling and a real `disabled` /
+ * `aria-disabled` state for free, while letting us render arbitrary children
+ * (math, icons) and set a `radio`/`checkbox` role.
+ *
+ * Disabled styling intentionally uses the WB disabled tokens so it reads as
+ * disabled consistently with the rest of the design system (no opacity hack).
+ */
+type ToggleButtonProps = {
+    selected: boolean;
+    onClick: () => void;
+    disabled?: boolean;
+    role?: "radio" | "checkbox";
+    "aria-label"?: string;
+    children: React.ReactNode;
+    style?: StyleType;
+};
+
+export function ToggleButton({
+    selected,
+    onClick,
+    disabled = false,
+    role = "radio",
+    children,
+    style,
+    "aria-label": ariaLabel,
+}: ToggleButtonProps): React.ReactElement {
+    return (
+        <Clickable
+            role={role}
+            aria-checked={selected}
+            aria-label={ariaLabel}
+            disabled={disabled}
+            onClick={onClick}
+            style={[styles.reset, style]}
+        >
+            {({hovered, pressed}) => (
+                <View
+                    style={[
+                        styles.segment,
+                        selected && styles.segmentSelected,
+                        !disabled &&
+                            !selected &&
+                            (hovered || pressed) &&
+                            styles.segmentHovered,
+                        disabled && styles.segmentDisabled,
+                        disabled && selected && styles.segmentDisabledSelected,
+                    ]}
+                >
+                    {children}
+                </View>
+            )}
+        </Clickable>
+    );
+}
+
+/**
+ * A row of mutually-exclusive (single-select) segments — a segmented control.
+ * Replaces the deprecated `Pill`-as-button pattern. Pass `disabled` to disable
+ * the whole group (e.g. `editingDisabled`).
+ */
+type Option = {
+    value: string;
+    label: React.ReactNode;
+    ariaLabel?: string;
+};
+
+type SegmentedControlProps = {
+    options: ReadonlyArray<Option>;
+    selectedValue: string | null | undefined;
+    onChange: (value: string) => void;
+    disabled?: boolean;
+    "aria-label"?: string;
+};
+
+export function SegmentedControl({
+    options,
+    selectedValue,
+    onChange,
+    disabled = false,
+    "aria-label": ariaLabel,
+}: SegmentedControlProps): React.ReactElement {
+    return (
+        <View role="radiogroup" aria-label={ariaLabel} style={styles.group}>
+            {options.map((option) => (
+                <ToggleButton
+                    key={option.value}
+                    role="radio"
+                    selected={option.value === selectedValue}
+                    aria-label={option.ariaLabel}
+                    disabled={disabled}
+                    onClick={() => onChange(option.value)}
+                >
+                    {option.label}
+                </ToggleButton>
+            ))}
+        </View>
+    );
+}
+
+/**
+ * A group of independent (multi-select) toggles — i.e. a set of checkboxes
+ * styled as buttons. Unlike `SegmentedControl`, more than one can be selected,
+ * and the group wraps onto multiple rows as an aligned grid (consistent row and
+ * column gaps) when it doesn't fit on one line. `onToggle` is called with the
+ * value that was clicked; the caller flips it in/out of `selectedValues`.
+ */
+type ToggleButtonGroupProps = {
+    options: ReadonlyArray<Option>;
+    selectedValues: ReadonlyArray<string>;
+    onToggle: (value: string) => void;
+    disabled?: boolean;
+    "aria-label"?: string;
+};
+
+export function ToggleButtonGroup({
+    options,
+    selectedValues,
+    onToggle,
+    disabled = false,
+    "aria-label": ariaLabel,
+}: ToggleButtonGroupProps): React.ReactElement {
+    return (
+        <View role="group" aria-label={ariaLabel} style={styles.wrapGroup}>
+            {options.map((option) => (
+                <ToggleButton
+                    key={option.value}
+                    role="checkbox"
+                    selected={selectedValues.includes(option.value)}
+                    aria-label={option.ariaLabel}
+                    disabled={disabled}
+                    onClick={() => onToggle(option.value)}
+                >
+                    {option.label}
+                </ToggleButton>
+            ))}
+        </View>
+    );
+}
+
+const styles = StyleSheet.create({
+    // inline-flex so the (single-select) group flows inline with adjacent
+    // labels/badges (e.g. the "Status" label) instead of wrapping onto its own
+    // line. It stays cohesive — its segments never split across lines; the whole
+    // group wraps below the label as a unit if there isn't room.
+    group: {
+        display: "inline-flex",
+        flexDirection: "row",
+        alignItems: "center",
+        verticalAlign: "middle",
+        gap: sizing.size_080,
+    },
+    // Multi-select group: wraps onto multiple rows as an aligned grid with
+    // consistent row + column gaps. Stretch to the full available width so it
+    // only wraps when the segments genuinely don't fit on one line (not because
+    // a flex parent shrank it to content width).
+    wrapGroup: {
+        flexDirection: "row",
+        flexWrap: "wrap",
+        alignItems: "center",
+        alignSelf: "stretch",
+        gap: sizing.size_080,
+    },
+    // Reset the Clickable's native <button> chrome; the visual lives on the
+    // inner View so it can react to hovered/pressed state. The keyboard focus
+    // ring is a rounded box-shadow (follows the border radius, unlike `outline`)
+    // shown only on `:focus-visible` so it doesn't appear after a mouse click.
+    reset: {
+        borderRadius: border.radius.radius_040,
+        ":focus-visible": {
+            outline: "none",
+            boxShadow: `0 0 0 ${border.width.medium} ${semanticColor.focus.outer}`,
+        },
+    },
+    segment: {
+        flexDirection: "row",
+        alignItems: "center",
+        justifyContent: "center",
+        paddingBlock: sizing.size_040,
+        paddingInline: sizing.size_120,
+        borderRadius: border.radius.radius_040,
+        border: `${border.width.thin} solid ${semanticColor.core.border.neutral.subtle}`,
+        backgroundColor: semanticColor.core.background.base.default,
+        color: semanticColor.core.foreground.neutral.strong,
+        fontSize: font.body.size.small,
+        lineHeight: font.body.lineHeight.small,
+        whiteSpace: "nowrap",
+    },
+    segmentSelected: {
+        backgroundColor: semanticColor.core.background.instructive.default,
+        borderColor: semanticColor.core.background.instructive.default,
+        color: semanticColor.core.foreground.knockout.default,
+    },
+    segmentHovered: {
+        borderColor: semanticColor.core.border.neutral.default,
+        backgroundColor: semanticColor.core.background.neutral.subtle,
+    },
+    segmentDisabled: {
+        backgroundColor: semanticColor.core.background.disabled.subtle,
+        borderColor: semanticColor.core.border.disabled.default,
+        color: semanticColor.core.foreground.disabled.default,
+        cursor: "not-allowed",
+    },
+    segmentDisabledSelected: {
+        backgroundColor: semanticColor.core.background.disabled.strong,
+        borderColor: semanticColor.core.background.disabled.strong,
+        color: semanticColor.core.foreground.disabled.strong,
+    },
+});

packages/perseus-editor/src/styles/perseus-editor.css

@@ -1062,25 +1062,33 @@ breaks the layout depending on the widget editors used.*/
  * Applied when editingDisabled=true to prevent content creators from making
  * changes while still allowing them to view the editor interface.
  *
- * Targets all form controls and interactive elements within disabled editors.
+ * The editor content is wrapped in a <fieldset disabled>, and the interactive
+ * controls are Wonder Blocks components that render their own accessible
+ * disabled state. So we deliberately DO NOT dim everything with `opacity`
+ * anymore — opacity is inherited by the content (text and math) and dropped it
+ * below a readable contrast (see LEMS-4131). We only add a muted background and
+ * a not-allowed cursor to the non-WB native and MathQuill inputs, using the WB
+ * disabled tokens so they read as disabled consistently with the design system.
  */
 .perseus-single-editor.perseus-editor-disabled input,
-.perseus-single-editor.perseus-editor-disabled textarea,
 .perseus-single-editor.perseus-editor-disabled select,
-.perseus-single-editor.perseus-editor-disabled checkbox,
 .perseus-single-editor.perseus-editor-disabled .perseus-math-input,
 .perseus-single-editor.perseus-editor-disabled .keypad-input {
-    opacity: 0.6 !important;
     background-color: var(
-        --wb-semanticColor-core-background-neutral-subtle
+        --wb-semanticColor-input-disabled-background
     ) !important;
     cursor: not-allowed !important;
-    border-color: var(--wb-semanticColor-core-border-neutral-subtle) !important;
+    border-color: var(--wb-semanticColor-input-disabled-border) !important;
 }
 
-/* We want to keep the button colors as it often helps denote correctness. */
-.perseus-single-editor.perseus-editor-disabled button {
-    opacity: 0.6 !important;
+/* The markdown field renders widget-reference highlights in a transparent
+   underlay that sits behind the textarea, so tint the container — not the
+   textarea — to keep the highlights visible while still reading as disabled. */
+.perseus-single-editor.perseus-editor-disabled .perseus-textarea-pair {
+    background-color: var(
+        --wb-semanticColor-input-disabled-background
+    ) !important;
+    border-color: var(--wb-semanticColor-input-disabled-border) !important;
     cursor: not-allowed !important;
 }