Fix termselect overshoot

modules/user/modules/quickshell/shell/SelectionArea.qml

@@ -14,7 +14,7 @@ Item {
 			selectionArea.startY = mouseY;
 			selectionArea.endX = mouseX;
 			selectionArea.endY = mouseY;
-			selectionArea.selecting = true;
+			selectionArea.startSelection(false);
 		}
 
 		onPositionChanged: {

modules/user/modules/quickshell/shell/SelectionLayer.qml

@@ -23,6 +23,7 @@ WlrLayershell {
 		id: area
 		property bool selecting: false
 		property bool initializing: false
+		property bool locked: false
 		property real startX: 0
 		property real startY: 0
 		property real endX: 0
@@ -41,7 +42,13 @@ WlrLayershell {
 		width: Math.max(startX, endX) - x + border.width * 2
 		height: Math.max(startY, endY) - y + border.width * 2
 
-		function startSelection() {
+		function startSelection(initialize: bool) {
+			locked = false;
+			if (!initialize) {
+				selecting = true;
+				return;
+			}
+
 			initializing = true
 			if (selecting) {
 				area.startX = mouseArea.mouseX;
@@ -56,6 +63,7 @@ WlrLayershell {
 			initializing = false;
 
 			if (wasSelecting && bigEnough) {
+				locked = true;
 				selectionComplete(x + 1, y + 1, width - 2, height - 2);
 			} else {
 				selecting = false;
@@ -81,7 +89,7 @@ WlrLayershell {
 				area.selecting = true;
 			}
 
-			if (selectionArea.selecting) {
+			if (!selectionArea.locked) {
 				area.endX = mouseX;
 				area.endY = mouseY;
 			}

modules/user/modules/quickshell/shell/shell.qml

@@ -64,7 +64,7 @@ ShellRoot {
 
 						function onTermSelectChanged() {
 							if (ShellIpc.termSelect) {
-								selectionLayer.selectionArea.startSelection();
+								selectionLayer.selectionArea.startSelection(true);
 							} else {
 								selectionLayer.selectionArea.endSelection();
 							}