Closes #1066: Fix upgrade modal layout shift by animating geometry and correcting viewport unit

Tests/e2e/specs/pricing-modal-layout.spec.ts

@@ -0,0 +1,139 @@
+import { test, expect } from '@playwright/test';
+import { loginAsAdmin } from '../fixtures/auth';
+import { screenshotElement } from '../fixtures/screenshot';
+
+/**
+ * Upgrade modal — layout shift / misalignment across the payment flow (#1066).
+ *
+ * The upgrade modal (`#imagify-pricing-modal` / `.imagify-payment-modal`) hosts three
+ * sequential view-states inside a single `.imagify-modal-content` box:
+ *   1. plan-selection (default)
+ *   2. payment iframe   (`.imagify-iframe-viewing` modifier)
+ *   3. thank-you        (`.imagify-success-viewing` modifier)
+ *
+ * `switchToView()` in `assets/js/pricing-modal.js` toggles those modifier classes to
+ * resize the shared box. Since the real payment flow cannot be driven end-to-end without
+ * a live Stripe/PayPal session, this spec simulates the step transitions by toggling the
+ * same modifier classes the controller uses, then asserts:
+ *   - a CSS `transition` is declared on the geometry properties that change between steps
+ *     (this is the actual fix — Option A from the spec — verified via computed style),
+ *   - the box stays horizontally centered (no unexpected leftward/rightward "shift"),
+ *   - no unexpected horizontal scrollbar appears on the modal at any step.
+ *
+ * Related issue: #1066
+ */
+test.describe( 'Upgrade modal — layout shift across payment flow steps (#1066)', () => {
+	test.beforeEach( async ( { page } ) => {
+		// The modal (Imagify_Views::print_modal_payment()) and its upsell trigger
+		// (views/part-upsell.php) only render for an account in a specific quota/plan
+		// state (free plan with quota remaining, or any non-infinite plan near its
+		// quota limit) — real account data fetched from the live Imagify API. Like the
+		// other API-dependent specs in this suite (account-connection.spec.ts,
+		// bulk-optimization.spec.ts), skip rather than fail when no real key is
+		// configured, since we cannot fabricate that account state locally.
+		test.skip( ! process.env.IMAGIFY_TESTS_API_KEY, 'IMAGIFY_TESTS_API_KEY not set — cannot reach an account/quota state that renders the upgrade modal' );
+
+		await loginAsAdmin( page );
+		await page.goto( '/wp-admin/options-general.php?page=imagify' );
+		await page.waitForLoadState( 'networkidle' );
+
+		// The configured account's live plan/quota state (e.g. an "infinite" plan) may not
+		// satisfy Imagify_Views::get_user_info(), in which case the modal never prints at
+		// all — this is real, mutable production account state, not something this suite
+		// can seed. Skip (do not hard-fail) when the trigger genuinely cannot appear, same
+		// as the other account-state-dependent specs in this suite.
+		const triggerCount = await page.locator( '.imagify-modal-trigger[data-target="#imagify-pricing-modal"]' ).count();
+		test.skip( triggerCount === 0, 'Configured account\'s plan/quota state does not render the upgrade modal trigger (see Imagify_Views::get_user_info()) — needs a free-plan test account with quota remaining.' );
+	} );
+
+	async function openPricingModal( page: import( '@playwright/test' ).Page ) {
+		const trigger = page.locator( '.imagify-modal-trigger[data-target="#imagify-pricing-modal"]' ).first();
+		await trigger.click();
+
+		const modalContent = page.locator( '#imagify-pricing-modal .imagify-modal-content' );
+		await expect( modalContent ).toBeVisible( { timeout: 10000 } );
+
+		return modalContent;
+	}
+
+	/**
+	 * Assert the modal box is (approximately) horizontally centered in the viewport, and
+	 * that no unexpected horizontal scrollbar has appeared.
+	 */
+	async function assertNoHorizontalShiftOrScrollbar( page: import( '@playwright/test' ).Page, modalContent: import( '@playwright/test' ).Locator ) {
+		const viewportSize = page.viewportSize();
+		expect( viewportSize ).not.toBeNull();
+
+		const box = await modalContent.boundingBox();
+		expect( box ).not.toBeNull();
+
+		const boxCenterX = box!.x + box!.width / 2;
+		const viewportCenterX = viewportSize!.width / 2;
+
+		// Allow a small tolerance for scrollbar width / sub-pixel rounding.
+		expect(
+			Math.abs( boxCenterX - viewportCenterX ),
+			`Expected .imagify-modal-content to stay horizontally centered (box center: ${ boxCenterX }, viewport center: ${ viewportCenterX })`
+		).toBeLessThanOrEqual( 5 );
+
+		const hasHorizontalScrollbar = await page.evaluate( () => {
+			return document.documentElement.scrollWidth > document.documentElement.clientWidth + 1;
+		} );
+
+		expect(
+			hasHorizontalScrollbar,
+			'Expected no unexpected horizontal scrollbar on the document while the modal is open.'
+		).toBe( false );
+	}
+
+	test( 'plan-selection step is centered with no horizontal scrollbar', async ( { page } ) => {
+		const modalContent = await openPricingModal( page );
+
+		await assertNoHorizontalShiftOrScrollbar( page, modalContent );
+		await screenshotElement( page, 'pricing-modal-step-1-plan-selection', modalContent );
+	} );
+
+	test( 'payment-iframe step is centered, transitions smoothly, and has no horizontal scrollbar', async ( { page } ) => {
+		const modalContent = await openPricingModal( page );
+
+		// Simulate switchToView() moving to the payment-iframe step by toggling the same
+		// modifier class the controller applies (the real flow requires a live payment
+		// session, which is not reachable in this environment).
+		await modalContent.evaluate( ( el ) => el.classList.add( 'imagify-iframe-viewing' ) );
+
+		// The resize is animated via a CSS transition (the fix for #1066) rather than
+		// instantaneous, so wait for it to settle before asserting the final geometry.
+		await page.waitForTimeout( 400 );
+
+		const transitionProperty = await modalContent.evaluate(
+			( el ) => window.getComputedStyle( el ).transitionProperty
+		);
+
+		expect(
+			transitionProperty,
+			`Expected .imagify-modal-content to declare a CSS transition on its geometry properties, got transition-property: "${ transitionProperty }"`
+		).not.toBe( 'all' );
+		expect( transitionProperty ).not.toBe( 'none' );
+
+		await assertNoHorizontalShiftOrScrollbar( page, modalContent );
+		await screenshotElement( page, 'pricing-modal-step-2-payment-iframe', modalContent );
+	} );
+
+	test( 'thank-you step is centered, transitions smoothly, and has no horizontal scrollbar', async ( { page } ) => {
+		const modalContent = await openPricingModal( page );
+
+		await modalContent.evaluate( ( el ) => el.classList.add( 'imagify-iframe-viewing' ) );
+		await page.waitForTimeout( 400 );
+
+		// Simulate switchToView() moving from the payment-iframe step to the thank-you step,
+		// mirroring the mutually-exclusive class toggle in `assets/js/pricing-modal.js`.
+		await modalContent.evaluate( ( el ) => {
+			el.classList.remove( 'imagify-iframe-viewing' );
+			el.classList.add( 'imagify-success-viewing' );
+		} );
+		await page.waitForTimeout( 400 );
+
+		await assertNoHorizontalShiftOrScrollbar( page, modalContent );
+		await screenshotElement( page, 'pricing-modal-step-3-thank-you', modalContent );
+	} );
+} );

assets/css/admin.css

@@ -1395,7 +1395,7 @@ ul.imagify-datas-details.imagify-datas-details {
 	position: relative;
 	width: 800px;
 	max-width: 95%;
-	max-height: 90vw;
+	max-height: 90vh;
 	overflow: auto;
 	padding: 20px 25px;
 	margin: 1em auto;

assets/css/pricing-modal.css

@@ -46,6 +46,12 @@
 	min-width: 925px;
 	padding: 0;
 }
+@media (prefers-reduced-motion: no-preference) {
+	.imagify-payment-modal .imagify-modal-content {
+		-webkit-transition: width .3s ease, min-width .3s ease, max-width .3s ease, height .3s ease, min-height .3s ease;
+		transition: width .3s ease, min-width .3s ease, max-width .3s ease, height .3s ease, min-height .3s ease;
+	}
+}
 .imagify-modal-content.imagify-iframe-viewing {
 	width: 980px;
 	height: 672px;

assets/js/admin.js

@@ -13,9 +13,10 @@ jQuery.extend( window.imagify, {
 		}
 	},
 	openModal: function( $link ) {
-		var target = $link.data( 'target' ) || $link.attr( 'href' );
+		var target = $link.data( 'target' ) || $link.attr( 'href' ),
+			$target = jQuery( target );
 
-		jQuery( target ).css( 'display', 'flex' ).hide().fadeIn( 400 ).attr( {
+		$target.css( 'display', 'flex' ).hide().fadeIn( 400 ).attr( {
 			'aria-hidden': 'false',
 			'tabindex':    '0'
 		} ).trigger('focus').removeAttr( 'tabindex' ).addClass( 'modal-is-open' );