feat: initial commit for pixel-snapping components and helpers

Modules/Bar/Bar.qml

@@ -4,11 +4,12 @@ import Quickshell
 import QtQuick
 import QtQuick.Layouts
 import ZShell.Config
+import ZShell.Components
 import qs.Components
 import qs.Modules.Bar.Components
 import qs.Modules.Bar.Popouts
 
-GridLayout {
+SnapLayout {
 	id: root
 
 	required property bool fullscreen
@@ -74,9 +75,47 @@ GridLayout {
 		return ch?.entryId ?? "";
 	}
 
-	columnSpacing: Tokens.spacing.small
-	columns: horizontal ? -1 : 1
-	rowSpacing: Tokens.spacing.small
+	readonly property var sectionRects: {
+		const count = repeater.count; // dependency: re-run when items are added/removed
+		const names = ["start", "middle", "end"]; // constant ids by position
+		const bounds = [null];
+		let spacers = 0;
+
+		for (let i = 0; i < count; i++) {
+			const it = repeater.itemAt(i) as EntryWrapper;
+			if (!it)
+				continue;
+
+			if (it.entryId === "spacer") {
+				bounds.push(null);
+				spacers++;
+				continue;
+			}
+
+			const l = it.x, t = it.y, r = it.x + it.width, b = it.y + it.height;
+			const cur = bounds[spacers];
+
+			bounds[spacers] = cur ? {
+				l: Math.min(cur.l, l),
+				t: Math.min(cur.t, t),
+				r: Math.max(cur.r, r),
+				b: Math.max(cur.b, b)
+			} : {
+				l,
+				t,
+				r,
+				b
+			};
+		}
+
+		return bounds.map((c, n) => ({
+					id: names[n] ?? `section${n}`,
+					rect: c ? Qt.rect(c.l, c.t, c.r - c.l, c.b - c.t) : Qt.rect(0, 0, 0, 0)
+				}));
+	}
+
+	spacing: Tokens.spacing.small
+	orientation: horizontal ? Qt.Horizontal : Qt.Vertical
 
 	Repeater {
 		id: repeater
@@ -229,16 +268,26 @@ GridLayout {
 	}
 
 	component EntryWrapper: Item {
+		readonly property int section: {
+			let n = 0;
+			for (let i = 0; i < index; i++) {
+				if (repeater.model.values[i].id === "spacer")
+					n++;
+			}
+			return n;
+		}
+
 		readonly property string entryId: modelData.id
 		required property int index
-		default property Item item
 		required property var modelData
 
+		default property Item item
+
 		Layout.alignment: root.horizontal ? Qt.AlignVCenter : Qt.AlignHCenter
 		Layout.bottomMargin: !root.horizontal && index === repeater.count - 1 ? root.vPadding : 0
-		Layout.leftMargin: root.horizontal && index === 0 ? root.vPadding : (entryId === "statusIcons" && root.horizontal) ? -root.rowSpacing + Tokens.spacing.extraSmall : 0
+		Layout.leftMargin: root.horizontal && index === 0 ? root.vPadding : (entryId === "statusIcons" && root.horizontal) ? -root.spacing + Tokens.spacing.extraSmall : 0
 		Layout.rightMargin: root.horizontal && index === repeater.count - 1 ? root.vPadding : 0
-		Layout.topMargin: !root.horizontal && index === 0 ? root.vPadding : (entryId === "statusIcons" && !root.horizontal) ? -root.columnSpacing + Tokens.spacing.extraSmall : 0
+		Layout.topMargin: !root.horizontal && index === 0 ? root.vPadding : (entryId === "statusIcons" && !root.horizontal) ? -root.spacing + Tokens.spacing.extraSmall : 0
 		children: item
 		implicitHeight: item?.implicitHeight ?? 0
 		implicitWidth: item?.implicitWidth ?? 0