Request the resize of ShellSurface after Decoration updated the borders when maximizing

Summary:
This ensures that we don't send a size request with the borders still
added.

Test Plan:
Verified that a maximized window is properly sized and
doesn't have empty borders

Reviewers: #kwin, #plasma_on_wayland

Subscribers: plasma-devel, kwin

Tags: #plasma_on_wayland, #kwin

Differential Revision: https://phabricator.kde.org/D1807

autotests/wayland/maximize_test.cpp

@@ -176,6 +176,9 @@ void TestMaximized::testMaximizedPassedToDeco()
     surface->damage(QRect(0, 0, 100, 50));
     surface->commit(Surface::CommitFlag::None);
 
+    QSignalSpy sizeChangedSpy(shellSurface.data(), &ShellSurface::sizeChanged);
+    QVERIFY(sizeChangedSpy.isValid());
+
     QVERIFY(clientAddedSpy.isEmpty());
     QVERIFY(clientAddedSpy.wait());
     auto client = clientAddedSpy.first().first().value<ShellClient*>();
@@ -186,12 +189,25 @@ void TestMaximized::testMaximizedPassedToDeco()
     QCOMPARE(client->maximizeMode(), MaximizeMode::MaximizeRestore);
 
     // now maximize
+    QVERIFY(sizeChangedSpy.isEmpty());
+    QSignalSpy bordersChangedSpy(decoration, &KDecoration2::Decoration::bordersChanged);
+    QVERIFY(bordersChangedSpy.isValid());
     QSignalSpy maximizedChangedSpy(decoration->client().data(), &KDecoration2::DecoratedClient::maximizedChanged);
     QVERIFY(maximizedChangedSpy.isValid());
     workspace()->slotWindowMaximize();
     QCOMPARE(client->maximizeMode(), MaximizeMode::MaximizeFull);
     QCOMPARE(maximizedChangedSpy.count(), 1);
     QCOMPARE(maximizedChangedSpy.last().first().toBool(), true);
+    QCOMPARE(bordersChangedSpy.count(), 1);
+    QCOMPARE(decoration->borderLeft(), 0);
+    QCOMPARE(decoration->borderBottom(), 0);
+    QCOMPARE(decoration->borderRight(), 0);
+    QVERIFY(decoration->borderTop() != 0);
+
+    QVERIFY(sizeChangedSpy.isEmpty());
+    QVERIFY(sizeChangedSpy.wait());
+    QCOMPARE(sizeChangedSpy.count(), 1);
+    QCOMPARE(sizeChangedSpy.first().first().toSize(), QSize(1280, 1024 - decoration->borderTop()));
 
     // now unmaximize again
     workspace()->slotWindowMaximize();

shell_client.cpp

@@ -572,19 +572,6 @@ void ShellClient::changeMaximize(bool horizontal, bool vertical, bool adjust)
         if (horizontal)
             m_maximizeMode = MaximizeMode(m_maximizeMode ^ MaximizeHorizontal);
     }
-
-    // TODO: check rules
-    if (m_maximizeMode == MaximizeFull) {
-        m_geomMaximizeRestore = geometry();
-        requestGeometry(workspace()->clientArea(MaximizeArea, this));
-        workspace()->raiseClient(this);
-    } else {
-        if (m_geomMaximizeRestore.isValid()) {
-            requestGeometry(m_geomMaximizeRestore);
-        } else {
-            requestGeometry(workspace()->clientArea(PlacementArea, this));
-        }
-    }
     // TODO: add more checks as in Client
 
     // call into decoration update borders
@@ -602,6 +589,19 @@ void ShellClient::changeMaximize(bool horizontal, bool vertical, bool adjust)
         }
         changeMaximizeRecursion = false;
     }
+
+    // TODO: check rules
+    if (m_maximizeMode == MaximizeFull) {
+        m_geomMaximizeRestore = geometry();
+        requestGeometry(workspace()->clientArea(MaximizeArea, this));
+        workspace()->raiseClient(this);
+    } else {
+        if (m_geomMaximizeRestore.isValid()) {
+            requestGeometry(m_geomMaximizeRestore);
+        } else {
+            requestGeometry(workspace()->clientArea(PlacementArea, this));
+        }
+    }
 }
 
 MaximizeMode ShellClient::maximizeMode() const