feat: flex component, document higher-order layout components

docs/layout-components.md

@@ -0,0 +1,62 @@
+---
+title: Higher-Order Layout Components
+---
+
+Quartz provides several higher-order components that help with layout composition and responsive design. These components wrap other components to add additional functionality or modify their behavior.
+
+## `Flex` Component
+
+The `Flex` component creates a [flexible box layout](https://developer.mozilla.org/en-US/docs/Web/CSS/flex) that can arrange child components in various ways. It's particularly useful for creating responsive layouts and organizing components in rows or columns.
+
+```typescript
+type FlexConfig = {
+  components: {
+    Component: QuartzComponent
+    grow?: boolean // whether component should grow to fill space
+    shrink?: boolean // whether component should shrink if needed
+    basis?: string // initial main size of the component
+    order?: number // order in flex container
+    align?: "start" | "end" | "center" | "stretch" // cross-axis alignment
+    justify?: "start" | "end" | "center" | "between" | "around" // main-axis alignment
+  }[]
+  direction?: "row" | "row-reverse" | "column" | "column-reverse"
+  wrap?: "nowrap" | "wrap" | "wrap-reverse"
+  gap?: string
+}
+```
+
+### Example Usage
+
+```typescript
+Component.Flex({
+  components: [
+    {
+      Component: Component.Search(),
+      grow: true, // Search will grow to fill available space
+    },
+    { Component: Component.Darkmode() }, // Darkmode keeps its natural size
+  ],
+  direction: "row",
+  gap: "1rem",
+})
+```
+
+## `MobileOnly` Component
+
+The `MobileOnly` component is a wrapper that makes its child component only visible on mobile devices. This is useful for creating responsive layouts where certain components should only appear on smaller screens.
+
+### Example Usage
+
+```typescript
+Component.MobileOnly(Component.Spacer())
+```
+
+## `DesktopOnly` Component
+
+The `DesktopOnly` component is the counterpart to `MobileOnly`. It makes its child component only visible on desktop devices. This helps create responsive layouts where certain components should only appear on larger screens.
+
+### Example Usage
+
+```typescript
+Component.DesktopOnly(Component.TableOfContents())
+```

docs/layout.md

@@ -35,7 +35,9 @@ These correspond to following parts of the page:
 
 Quartz **components**, like plugins, can take in additional properties as configuration options. If you're familiar with React terminology, you can think of them as Higher-order Components.
 
-See [a list of all the components](component.md) for all available components along with their configuration options. You can also checkout the guide on [[creating components]] if you're interested in further customizing the behaviour of Quartz.
+See [a list of all the components](component.md) for all available components along with their configuration options. Additionally, Quartz provides several built-in higher-order components for layout composition - see [[layout-components]] for more details.
+
+You can also checkout the guide on [[creating components]] if you're interested in further customizing the behaviour of Quartz.
 
 ### Layout breakpoints
 

quartz.layout.ts

@@ -25,8 +25,15 @@ export const defaultContentPageLayout: PageLayout = {
   left: [
     Component.PageTitle(),
     Component.MobileOnly(Component.Spacer()),
-    Component.Search(),
-    Component.Darkmode(),
+    Component.Flex({
+      components: [
+        {
+          Component: Component.Search(),
+          grow: true,
+        },
+        { Component: Component.Darkmode() },
+      ],
+    }),
     Component.Explorer(),
   ],
   right: [

quartz/components/DesktopOnly.tsx

@@ -1,7 +1,6 @@
 import { QuartzComponent, QuartzComponentConstructor, QuartzComponentProps } from "./types"
 
-export default ((component?: QuartzComponent) => {
-  if (component) {
+export default ((component: QuartzComponent) => {
   const Component = component
   const DesktopOnly: QuartzComponent = (props: QuartzComponentProps) => {
     return <Component displayClass="desktop-only" {...props} />
@@ -12,7 +11,4 @@ export default ((component?: QuartzComponent) => {
   DesktopOnly.beforeDOMLoaded = component?.beforeDOMLoaded
   DesktopOnly.css = component?.css
   return DesktopOnly
-  } else {
-    return () => <></>
-  }
-}) satisfies QuartzComponentConstructor
+}) satisfies QuartzComponentConstructor<QuartzComponent>

quartz/components/Flex.tsx

@@ -0,0 +1,55 @@
+import { concatenateResources } from "../util/resources"
+import { QuartzComponent, QuartzComponentConstructor, QuartzComponentProps } from "./types"
+
+type FlexConfig = {
+  components: {
+    Component: QuartzComponent
+    grow?: boolean
+    shrink?: boolean
+    basis?: string
+    order?: number
+    align?: "start" | "end" | "center" | "stretch"
+    justify?: "start" | "end" | "center" | "between" | "around"
+  }[]
+  direction?: "row" | "row-reverse" | "column" | "column-reverse"
+  wrap?: "nowrap" | "wrap" | "wrap-reverse"
+  gap?: string
+}
+
+export default ((config: FlexConfig) => {
+  const Flex: QuartzComponent = (props: QuartzComponentProps) => {
+    const direction = config.direction ?? "row"
+    const wrap = config.wrap ?? "nowrap"
+    const gap = config.gap ?? "1rem"
+
+    return (
+      <div style={`display: flex; flex-direction: ${direction}; flex-wrap: ${wrap}; gap: ${gap};`}>
+        {config.components.map((c) => {
+          const grow = c.grow ? 1 : 0
+          const shrink = (c.shrink ?? true) ? 1 : 0
+          const basis = c.basis ?? "auto"
+          const order = c.order ?? 0
+          const align = c.align ?? "center"
+          const justify = c.justify ?? "center"
+
+          return (
+            <div
+              style={`flex-grow: ${grow}; flex-shrink: ${shrink}; flex-basis: ${basis}; order: ${order}; align-self: ${align}; justify-self: ${justify};`}
+            >
+              <c.Component {...props} />
+            </div>
+          )
+        })}
+      </div>
+    )
+  }
+
+  Flex.afterDOMLoaded = concatenateResources(
+    ...config.components.map((c) => c.Component.afterDOMLoaded),
+  )
+  Flex.beforeDOMLoaded = concatenateResources(
+    ...config.components.map((c) => c.Component.beforeDOMLoaded),
+  )
+  Flex.css = concatenateResources(...config.components.map((c) => c.Component.css))
+  return Flex
+}) satisfies QuartzComponentConstructor<FlexConfig>

quartz/components/MobileOnly.tsx

@@ -1,7 +1,6 @@
 import { QuartzComponent, QuartzComponentConstructor, QuartzComponentProps } from "./types"
 
-export default ((component?: QuartzComponent) => {
-  if (component) {
+export default ((component: QuartzComponent) => {
   const Component = component
   const MobileOnly: QuartzComponent = (props: QuartzComponentProps) => {
     return <Component displayClass="mobile-only" {...props} />
@@ -12,7 +11,4 @@ export default ((component?: QuartzComponent) => {
   MobileOnly.beforeDOMLoaded = component?.beforeDOMLoaded
   MobileOnly.css = component?.css
   return MobileOnly
-  } else {
-    return () => <></>
-  }
-}) satisfies QuartzComponentConstructor
+}) satisfies QuartzComponentConstructor<QuartzComponent>

quartz/components/index.ts

@@ -20,6 +20,7 @@ import MobileOnly from "./MobileOnly"
 import RecentNotes from "./RecentNotes"
 import Breadcrumbs from "./Breadcrumbs"
 import Comments from "./Comments"
+import Flex from "./Flex"
 
 export {
   ArticleTitle,
@@ -44,4 +45,5 @@ export {
   NotFound,
   Breadcrumbs,
   Comments,
+  Flex,
 }