lok: add viewId to window painting, to allow special-casing on render.

View switching should not cause the sidebar UX to re-build at all.
Particularly it should not do this when we switch view just to render
a sidebar.

Change-Id: Iec0427cdc8308fc273d73ea56dd208bfa7036471
Reviewed-on: https://gerrit.libreoffice.org/84120
Tested-by: Jenkins CollaboraOffice <jenkinscollaboraoffice@gmail.com>
Reviewed-by: Michael Meeks <michael.meeks@collabora.com>
(cherry picked from commit 92814f3389de346f3ae32cddb38f079763e68ddf)
Reviewed-on: https://gerrit.libreoffice.org/84129
Tested-by: Jenkins
Reviewed-on: https://gerrit.libreoffice.org/84223

2 files changed, 25 insertions, 7 deletions

diff --git a/desktop/qa/desktop_lib/test_desktop_lib.cxx b/desktop/qa/desktop_lib/test_desktop_lib.cxx
index 2c2d03b967ea..1bb185dd5b9e 100644
--- a/desktop/qa/desktop_lib/test_desktop_lib.cxx
+++ b/desktop/qa/desktop_lib/test_desktop_lib.cxx
@@ -2746,10 +2746,11 @@ void DesktopLOKTest::testABI()
     CPPUNIT_ASSERT_EQUAL(documentClassOffset(55), offsetof(struct _LibreOfficeKitDocumentClass, removeTextContext));
     CPPUNIT_ASSERT_EQUAL(documentClassOffset(56), offsetof(struct _LibreOfficeKitDocumentClass, sendDialogEvent));
     CPPUNIT_ASSERT_EQUAL(documentClassOffset(57), offsetof(struct _LibreOfficeKitDocumentClass, renderFontOrientation));
+    CPPUNIT_ASSERT_EQUAL(documentClassOffset(58), offsetof(struct _LibreOfficeKitDocumentClass, paintWindowForView));
 
     // Extending is fine, update this, and add new assert for the offsetof the
     // new method
-    CPPUNIT_ASSERT_EQUAL(documentClassOffset(58), sizeof(struct _LibreOfficeKitDocumentClass));
+    CPPUNIT_ASSERT_EQUAL(documentClassOffset(59), sizeof(struct _LibreOfficeKitDocumentClass));
 }
 
 CPPUNIT_TEST_SUITE_REGISTRATION(DesktopLOKTest);
diff --git a/desktop/source/lib/init.cxx b/desktop/source/lib/init.cxx
index bc0fd62eb78a..fcd986512f28 100644
--- a/desktop/source/lib/init.cxx
+++ b/desktop/source/lib/init.cxx
@@ -901,6 +901,11 @@ static void doc_paintWindowDPI(LibreOfficeKitDocument* pThis, unsigned nLOKWindo
                                const int nWidth, const int nHeight,
                                const double fDPIScale);
 
+static void doc_paintWindowForView(LibreOfficeKitDocument* pThis, unsigned nLOKWindowId, unsigned char* pBuffer,
+                                   const int nX, const int nY,
+                                   const int nWidth, const int nHeight,
+                                   const double fDPIScale, int viewId);
+
 static void doc_postWindow(LibreOfficeKitDocument* pThis, unsigned
  nLOKWindowId, int nAction, const char* pData);
 
@@ -1013,6 +1018,7 @@ LibLODocument_Impl::LibLODocument_Impl(const uno::Reference <css::lang::XCompone
 
         m_pDocumentClass->paintWindow = doc_paintWindow;
         m_pDocumentClass->paintWindowDPI = doc_paintWindowDPI;
+        m_pDocumentClass->paintWindowForView = doc_paintWindowForView;
         m_pDocumentClass->postWindow = doc_postWindow;
         m_pDocumentClass->resizeWindow = doc_resizeWindow;
 
@@ -4806,12 +4812,20 @@ static void doc_paintWindow(LibreOfficeKitDocument* pThis, unsigned nLOKWindowId
     doc_paintWindowDPI(pThis, nLOKWindowId, pBuffer, nX, nY, nWidth, nHeight, 1.0);
 }
 
-static void doc_paintWindowDPI(LibreOfficeKitDocument* /*pThis*/, unsigned nLOKWindowId,
+static void doc_paintWindowDPI(LibreOfficeKitDocument* pThis, unsigned nLOKWindowId,
                                unsigned char* pBuffer,
                                const int nX, const int nY,
                                const int nWidth, const int nHeight,
                                const double fDPIScale)
 {
+    doc_paintWindowForView(pThis, nLOKWindowId, pBuffer, nX, nY, nWidth, nHeight, fDPIScale, -1);
+}
+
+static void doc_paintWindowForView(LibreOfficeKitDocument* pThis, unsigned nLOKWindowId,
+                                   unsigned char* pBuffer, const int nX, const int nY,
+                                   const int nWidth, const int nHeight,
+                                   const double fDPIScale, int viewId)
+{
     comphelper::ProfileZone aZone("doc_paintWindowDPI");
 
     SolarMutexGuard aGuard;
@@ -4824,6 +4838,12 @@ static void doc_paintWindowDPI(LibreOfficeKitDocument* /*pThis*/, unsigned nLOKW
         return;
     }
 
+    // Used to avoid work in setView if set.
+    comphelper::LibreOfficeKit::setDialogPainting(true);
+
+    if (viewId >= 0)
+        doc_setView(pThis, viewId);
+
     // Setup cairo (or CoreGraphics, in the iOS case) to draw with the changed DPI scale (and return
     // back to 1.0 when the painting finishes)
     comphelper::ScopeGuard dpiScaleGuard([]() { comphelper::LibreOfficeKit::setDPIScale(1.0); });
@@ -4848,9 +4868,7 @@ static void doc_paintWindowDPI(LibreOfficeKitDocument* /*pThis*/, unsigned nLOKW
     aMapMode.SetOrigin(Point(-(nX / fDPIScale), -(nY / fDPIScale)));
     pDevice->SetMapMode(aMapMode);
 
-    comphelper::LibreOfficeKit::setDialogPainting(true);
     pWindow->PaintToDevice(pDevice.get(), Point(0, 0), Size());
-    comphelper::LibreOfficeKit::setDialogPainting(false);
 
     CGContextRelease(cgc);
 
@@ -4865,11 +4883,10 @@ static void doc_paintWindowDPI(LibreOfficeKitDocument* /*pThis*/, unsigned nLOKW
     aMapMode.SetOrigin(Point(-(nX / fDPIScale), -(nY / fDPIScale)));
     pDevice->SetMapMode(aMapMode);
 
-    comphelper::LibreOfficeKit::setDialogPainting(true);
     pWindow->PaintToDevice(pDevice.get(), Point(0, 0), Size());
-    comphelper::LibreOfficeKit::setDialogPainting(false);
-
 #endif
+
+    comphelper::LibreOfficeKit::setDialogPainting(false);
 }
 
 static void doc_postWindow(LibreOfficeKitDocument* /*pThis*/, unsigned nLOKWindowId, int nAction, const char* pData)