ControlCenter: Implement edit mode for customizing widgets

Modules/ControlCenter/utils/layout.js

@@ -0,0 +1,45 @@
+function calculateRowsAndWidgets(controlCenterColumn, expandedSection, expandedWidgetIndex) {
+    var rows = []
+    var currentRow = []
+    var currentWidth = 0
+    var expandedRow = -1
+
+    const widgets = SettingsData.controlCenterWidgets || []
+    const baseWidth = controlCenterColumn.width
+    const spacing = Theme.spacingS
+
+    for (var i = 0; i < widgets.length; i++) {
+        const widget = widgets[i]
+        const widgetWidth = widget.width || 50
+
+        var itemWidth
+        if (widgetWidth <= 25) {
+            itemWidth = (baseWidth - spacing * 3) / 4
+        } else if (widgetWidth <= 50) {
+            itemWidth = (baseWidth - spacing) / 2
+        } else if (widgetWidth <= 75) {
+            itemWidth = (baseWidth - spacing * 2) * 0.75
+        } else {
+            itemWidth = baseWidth
+        }
+
+        if (currentRow.length > 0 && (currentWidth + spacing + itemWidth > baseWidth)) {
+            rows.push([...currentRow])
+            currentRow = [widget]
+            currentWidth = itemWidth
+        } else {
+            currentRow.push(widget)
+            currentWidth += (currentRow.length > 1 ? spacing : 0) + itemWidth
+        }
+
+        if (widget.id === expandedSection && expandedWidgetIndex === i) {
+            expandedRow = rows.length
+        }
+    }
+
+    if (currentRow.length > 0) {
+        rows.push(currentRow)
+    }
+
+    return { rows: rows, expandedRowIndex: expandedRow }
+}