From fa445388e4ae7bf578abc687e09679ee8d1280c6 Mon Sep 17 00:00:00 2001
From: bbedward <bbedward@gmail.com>
Date: Tue, 1 Sep 2026 10:50:22 -0400
Subject: [PATCH] island/bar: square blur region corners where goth paths paint
 square

ref #3191
---
 quickshell/Modules/DankBar/DankBarBody.qml    | 35 ++++++++++++++
 .../DankIsland/IslandSatelliteHost.qml        | 47 ++++++++++++++++++-
 2 files changed, 80 insertions(+), 2 deletions(-)

diff --git a/quickshell/Modules/DankBar/DankBarBody.qml b/quickshell/Modules/DankBar/DankBarBody.qml
index 282ff12a7..d792c2d10 100644
--- a/quickshell/Modules/DankBar/DankBarBody.qml
+++ b/quickshell/Modules/DankBar/DankBarBody.qml
@@ -265,6 +265,28 @@ Item {
         }
     }
 
+    Component {
+        id: blurCornerRegionComp
+
+        // BarCanvas paints square corners at the attached edge and the wing roots (#2975); re-add what the body radius rounds off
+        Region {
+            id: cornerRegion
+
+            property bool atRight: false
+            property bool atBottom: false
+
+            readonly property real r: barBackground.rt
+            readonly property bool attachedEdgeCorner: (barBackground.isTop && !atBottom) || (barBackground.isBottom && atBottom) || (barBackground.isLeft && !atRight) || (barBackground.isRight && atRight)
+            readonly property bool wingEdgeCorner: (barBackground.isTop && atBottom) || (barBackground.isBottom && !atBottom) || (barBackground.isLeft && atRight) || (barBackground.isRight && !atRight)
+            readonly property bool squared: (barBackground.edgeAttached && attachedEdgeCorner) || (barBackground.gothEnabled && wingEdgeCorner)
+
+            x: topBarMouseArea.x + barUnitInset.x + topBarSlide.x + (atRight ? barUnitInset.width - r : 0)
+            y: topBarMouseArea.y + barUnitInset.y + topBarSlide.y + (atBottom ? barUnitInset.height - r : 0)
+            width: squared ? r : 0
+            height: squared ? r : 0
+        }
+    }
+
     Item {
         id: barBlur
         visible: false
@@ -319,6 +341,19 @@ Item {
                 }
             }
 
+            if (hasBar) {
+                for (const atRight of [false, true]) {
+                    for (const atBottom of [false, true]) {
+                        const corner = blurCornerRegionComp.createObject(region, {
+                            atRight: atRight,
+                            atBottom: atBottom
+                        });
+                        if (corner)
+                            subRegions.push(corner);
+                    }
+                }
+            }
+
             region.regions = subRegions;
 
             barWindow.blurRegion = region;
diff --git a/quickshell/Modules/DankIsland/IslandSatelliteHost.qml b/quickshell/Modules/DankIsland/IslandSatelliteHost.qml
index 289aec221..18f73c24f 100644
--- a/quickshell/Modules/DankIsland/IslandSatelliteHost.qml
+++ b/quickshell/Modules/DankIsland/IslandSatelliteHost.qml
@@ -204,8 +204,8 @@ Item {
                 subRegions.push(islandSub);
         }
         for (const chrome of chromes) {
-            const body = blurItemRegionComp.createObject(region, {
-                w: chrome
+            const body = blurChromeRegionComp.createObject(region, {
+                chrome: chrome
             });
             if (body)
                 subRegions.push(body);
@@ -313,6 +313,49 @@ Item {
         }
     }
 
+    Component {
+        id: blurChromeRegionComp
+
+        // The chrome paints square corners at the attached edge (and above the sweep in edge mode); square those blur corners too
+        Region {
+            id: body
+
+            property Item chrome
+
+            readonly property real cr: body.chrome.cornerR
+            readonly property real edgeY: body.chrome.bottomEdge ? body.y + body.height - body.cr : body.y
+            readonly property real sweepY: body.chrome.bottomEdge ? body.y : body.y + body.height - body.cr
+            readonly property bool sweepSquare: !body.chrome.floating && body.chrome.sweepR > 0
+
+            x: body.chrome.x
+            y: body.chrome.y
+            width: body.chrome.width
+            height: body.chrome.height
+            radius: body.cr
+
+            Region {
+                x: body.x
+                y: body.edgeY
+                width: body.cr
+                height: body.cr
+            }
+
+            Region {
+                x: body.x + body.width - body.cr
+                y: body.edgeY
+                width: body.cr
+                height: body.cr
+            }
+
+            Region {
+                x: body.chrome.rightSide ? body.x + body.width - body.cr : body.x
+                y: body.sweepY
+                width: body.sweepSquare ? body.cr : 0
+                height: body.sweepSquare ? body.cr : 0
+            }
+        }
+    }
+
     Component {
         id: blurIslandRegionComp