Implement ruler bounds visualization for the AABB of selected layers (#4090)

* Implement ruler bounds visualization for the AABB of selected layers

* Code review fixes

editor/src/messages/frontend/frontend_message.rs

@@ -246,6 +246,8 @@ pub enum FrontendMessage {
 		visible: bool,
 		tilt: f64,
 		flip: bool,
+		#[serde(rename = "selectionQuad")]
+		selection_quad: Option<[(f64, f64); 4]>,
 	},
 	UpdateDocumentScrollbars {
 		position: (f64, f64),

editor/src/messages/portfolio/document/document_message_handler.rs

@@ -838,6 +838,23 @@ impl MessageHandler<DocumentMessage, DocumentMessageContext<'_>> for DocumentMes
 
 				let ruler_spacing = ruler_interval * ruler_scale;
 
+				// Compute the selection bounding box as 4 viewport-space corners preserving orientation
+				let selection_quad = if !self.graph_view_overlay_open {
+					self.network_interface
+						.selected_nodes()
+						.0
+						.iter()
+						.filter(|node| self.network_interface.is_layer(node, &[]))
+						.filter_map(|layer| self.metadata().bounding_box_document(LayerNodeIdentifier::new(*layer, &self.network_interface)))
+						.reduce(Quad::combine_bounds)
+						.map(|[min, max]| {
+							let corners = [DVec2::new(min.x, min.y), DVec2::new(max.x, min.y), DVec2::new(max.x, max.y), DVec2::new(min.x, max.y)];
+							corners.map(|c| document_to_viewport.transform_point2(c).into())
+						})
+				} else {
+					None
+				};
+
 				responses.add(FrontendMessage::UpdateDocumentRulers {
 					origin: ruler_origin.into(),
 					spacing: ruler_spacing,
@@ -845,6 +862,7 @@ impl MessageHandler<DocumentMessage, DocumentMessageContext<'_>> for DocumentMes
 					visible: self.rulers_visible,
 					tilt: if self.graph_view_overlay_open { 0. } else { current_ptz.tilt() },
 					flip: !self.graph_view_overlay_open && current_ptz.flip,
+					selection_quad,
 				});
 			}
 			DocumentMessage::RenderScrollbars => {

frontend/src/components/Editor.svelte

@@ -144,6 +144,8 @@
 		--color-data-invalid: #d6536e; // Same as --color-error-red
 		--color-data-invalid-dim: #a7324a;
 
+		--color-overlay-blue: #00a8ff;
+
 		--color-none: white;
 		--color-none-repeat: no-repeat;
 		--color-none-position: center center;

frontend/src/components/panels/Document.svelte

@@ -47,6 +47,7 @@
 	let rulerTilt = 0;
 	let rulerFlip = false;
 	let rulerCursorPosition: { x: number; y: number } | undefined;
+	let rulerSelectionQuad: [number, number][] | undefined;
 	let viewportBounds: DOMRect | undefined;
 
 	// Rendered SVG viewport data
@@ -291,13 +292,14 @@
 		scrollbarMultiplier = { x: multiplier[0], y: multiplier[1] };
 	}
 
-	export function updateDocumentRulers(origin: [number, number], spacing: number, interval: number, visible: boolean, tilt: number, flip: boolean) {
+	export function updateDocumentRulers(origin: [number, number], spacing: number, interval: number, visible: boolean, tilt: number, flip: boolean, selectionQuad: [number, number][] | undefined) {
 		rulerOrigin = { x: origin[0], y: origin[1] };
 		rulerSpacing = spacing;
 		rulerInterval = interval;
 		rulersVisible = visible;
 		rulerTilt = tilt;
 		rulerFlip = flip;
+		rulerSelectionQuad = selectionQuad;
 	}
 
 	function updateRulerCursorPosition(e: PointerEvent) {
@@ -498,8 +500,8 @@
 		subscriptions.subscribeFrontendMessage("UpdateDocumentRulers", async (data) => {
 			await tick();
 
-			const { origin, spacing, interval, visible, tilt, flip } = data;
-			updateDocumentRulers(origin, spacing, interval, visible, tilt, flip);
+			const { origin, spacing, interval, visible, tilt, flip, selectionQuad } = data;
+			updateDocumentRulers(origin, spacing, interval, visible, tilt, flip, selectionQuad || undefined);
 		});
 
 		// Update mouse cursor icon
@@ -615,6 +617,7 @@
 						numberInterval={rulerInterval}
 						direction="Horizontal"
 						cursorPosition={rulerCursorPosition}
+						selectionQuad={rulerSelectionQuad}
 						bind:this={rulerHorizontal}
 					/>
 				</LayoutRow>
@@ -631,6 +634,7 @@
 							numberInterval={rulerInterval}
 							direction="Vertical"
 							cursorPosition={rulerCursorPosition}
+							selectionQuad={rulerSelectionQuad}
 							bind:this={rulerVertical}
 						/>
 					</LayoutCol>

frontend/src/components/widgets/inputs/RulerInput.svelte

@@ -1,6 +1,7 @@
 <script lang="ts">
 	import { onMount } from "svelte";
 
+	const SELECTION_ENDPOINT_SIZE = 5;
 	const RULER_THICKNESS = 16;
 	const MAJOR_MARK_THICKNESS = 16;
 	const MINOR_MARK_THICKNESS = 6;
@@ -19,6 +20,7 @@
 	export let minorDivisions = 5;
 	export let microDivisions = 2;
 	export let cursorPosition: { x: number; y: number } | undefined = undefined;
+	export let selectionQuad: [number, number][] | undefined = undefined;
 
 	let rulerInput: HTMLDivElement | undefined;
 	let rulerLength = 0;
@@ -37,6 +39,7 @@
 	$: svgPath = computeSvgPath(direction, effectiveOrigin, stretchedSpacing, stretchFactor, minorDivisions, microDivisions, rulerLength, crossAxisDirection);
 	$: svgTexts = computeSvgTexts(direction, effectiveOrigin, stretchedSpacing, numberInterval, rulerLength, trackedAxis, crossAxisDirection);
 	$: cursorIndicatorPath = computeCursorIndicator(direction, cursorPosition, crossAxisDirection);
+	$: selectionExtent = computeSelectionExtent(direction, selectionQuad, crossAxisDirection);
 
 	function computeAxes(tilt: number): { horiz: Axis; vert: Axis } {
 		const normTilt = ((tilt % TAU) + TAU) % TAU;
@@ -165,6 +168,14 @@
 		return `M${sx},${sy}l${dx * length},${dy * length}`;
 	}
 
+	function computeSelectionExtent(direction: RulerDirection, quad: [number, number][] | undefined, crossAxisDirection: [number, number]): { min: number; max: number } | undefined {
+		if (!quad || quad.length === 0) return undefined;
+
+		const projected = quad.map(([x, y]) => projectOntoRuler(direction, x, y, crossAxisDirection));
+
+		return { min: Math.min(...projected), max: Math.max(...projected) };
+	}
+
 	export function resize() {
 		if (!rulerInput) return;
 
@@ -190,7 +201,8 @@
 	onMount(resize);
 </script>
 
-<div class={`ruler-input ${direction.toLowerCase()}`} bind:this={rulerInput}>
+<div class="ruler-input">
+	<div class={`ruler-area ${direction === "Horizontal" ? "horizontal" : "vertical"}`} bind:this={rulerInput}>
 		<svg style:width={svgBounds.width} style:height={svgBounds.height}>
 			<path d={svgPath} />
 			{#each svgTexts as svgText}
@@ -200,16 +212,47 @@
 				<path class="cursor-indicator" d={cursorIndicatorPath} />
 			{/if}
 		</svg>
+	</div>
+	{#if selectionExtent}
+		{@const isVertical = direction === "Vertical"}
+		{@const minPos = Math.round(selectionExtent.min)}
+		{@const maxPos = Math.round(selectionExtent.max)}
+		{@const half = Math.floor(SELECTION_ENDPOINT_SIZE / 2)}
+		{@const overlap = Math.ceil(SELECTION_ENDPOINT_SIZE / 2)}
+		<div class="selection-overlay-container" style:width={isVertical ? `${RULER_THICKNESS + overlap}px` : "100%"} style:height={isVertical ? "100%" : `${RULER_THICKNESS + overlap}px`}>
+			<div
+				class="selection-line"
+				style:left={isVertical ? `${RULER_THICKNESS}px` : `${minPos}px`}
+				style:top={isVertical ? `${minPos}px` : `${RULER_THICKNESS}px`}
+				style:width={isVertical ? "1px" : `${maxPos - minPos}px`}
+				style:height={isVertical ? `${maxPos - minPos}px` : "1px"}
+			></div>
+			{#each [minPos, maxPos] as pos}
+				<div
+					class="selection-endpoint"
+					style:left={isVertical ? `${RULER_THICKNESS - half}px` : `${pos - half}px`}
+					style:top={isVertical ? `${pos - half}px` : `${RULER_THICKNESS - half}px`}
+					style:width={`${SELECTION_ENDPOINT_SIZE}px`}
+					style:height={`${SELECTION_ENDPOINT_SIZE}px`}
+				></div>
+			{/each}
+		</div>
+	{/if}
 </div>
 
 <style lang="scss">
 	.ruler-input {
 		flex: 1 1 100%;
-		background: var(--color-2-mildblack);
-		overflow: hidden;
 		position: relative;
 		box-sizing: border-box;
 
+		.ruler-area {
+			background: var(--color-2-mildblack);
+			width: 100%;
+			height: 100%;
+			position: relative;
+			overflow: hidden;
+
 			&.horizontal {
 				height: 16px;
 				border-bottom: 1px solid var(--color-5-dullgray);
@@ -242,4 +285,25 @@
 				}
 			}
 		}
+
+		.selection-overlay-container {
+			overflow: hidden;
+			position: absolute;
+			z-index: 1;
+			top: 0;
+			left: 0;
+		}
+
+		.selection-line {
+			position: absolute;
+			background: var(--color-8-uppergray);
+		}
+
+		.selection-endpoint {
+			position: absolute;
+			background: var(--color-2-mildblack);
+			border: 1px solid var(--color-overlay-blue);
+			box-sizing: border-box;
+		}
+	}
 </style>