sw DoNotCaptureDrawObjsOnPage: don't capture wrap-through Writer images, either

This compat flag was originally added in commit
7961b14c4f9f00696b241e5ad9bf9ba18041fe22 (INTEGRATION: CWS
swdrawobjpos203 (1.12.54); FILE MERGED, 2006-03-22) for compatibility
with OOo 1.x.

Later commit af313fc149f80adb0f1680ca20e19745ccb7fede (tdf#105143 DOCX
import: enable DoNotCaptureDrawObjsOnPage layout compat option,
2017-01-06) also turned it on for DOCX documents.

One overlooked difference was that the compat flag disables "capturing"
of draw objects only, but not wrap-through Writer images. The DOCX case
wants the same for wrap-through Writer images as well, since Word does
no capturing in either case.

Fix the problem by disabling capturing for wrap-through Writer images as
well; if this turns out to be too problematic, we can have a dedicated
compat flag just for OOo 1.x documents, but that comes at some cost as
well.  (Need to write the new compat flag to each & every new ODT.)

TextBoxes are handled separately (see testTDF91260 in
CppunitTest_sw_ooxmlexport8), so leave their handling unchanged.

Change-Id: I74f434ed7518d7784c7cba085deb6ff8baf1770a
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/87289
Reviewed-by: Miklos Vajna <vmiklos@collabora.com>
Tested-by: Jenkins

3 files changed, 19 insertions, 2 deletions

diff --git a/sw/qa/extras/layout/data/writer-image-no-capture.docx b/sw/qa/extras/layout/data/writer-image-no-capture.docx
new file mode 100644
index 000000000000..ebb1f669f4a7
--- /dev/null
+++ b/sw/qa/extras/layout/data/writer-image-no-capture.docx
diff --git a/sw/qa/extras/layout/layout.cxx b/sw/qa/extras/layout/layout.cxx
index f1ed1785532e..862f4a30eb41 100644
--- a/sw/qa/extras/layout/layout.cxx
+++ b/sw/qa/extras/layout/layout.cxx
@@ -3608,6 +3608,21 @@ CPPUNIT_TEST_FIXTURE(SwLayoutWriter, testTdf121658)
     assertXPath(pXmlDoc, "//Special[@nType='PortionType::Hyphen']", 2);
 }
 
+CPPUNIT_TEST_FIXTURE(SwLayoutWriter, testWriterImageNoCapture)
+{
+    createDoc("writer-image-no-capture.docx");
+    xmlDocPtr pXmlDoc = parseLayoutDump();
+    CPPUNIT_ASSERT(pXmlDoc);
+    sal_Int32 nPageLeft = getXPath(pXmlDoc, "//page/infos/bounds", "left").toInt32();
+    sal_Int32 nImageLeft = getXPath(pXmlDoc, "//fly/infos/bounds", "left").toInt32();
+    // Without the accompanying fix in place, this test would have failed with:
+    // - Expected less than: 284
+    // - Actual  : 284
+    // i.e. the image position was modified to be inside the page frame ("captured"), even if Word
+    // does not do that.
+    CPPUNIT_ASSERT_LESS(nPageLeft, nImageLeft);
+}
+
 CPPUNIT_PLUGIN_IMPLEMENT();
 
 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/sw/source/core/objectpositioning/anchoredobjectposition.cxx b/sw/source/core/objectpositioning/anchoredobjectposition.cxx
index 6a9e02a499bf..48a0e27c881c 100644
--- a/sw/source/core/objectpositioning/anchoredobjectposition.cxx
+++ b/sw/source/core/objectpositioning/anchoredobjectposition.cxx
@@ -117,10 +117,12 @@ void SwAnchoredObjectPosition::GetInfoAboutObj()
     // determine, if anchored object has not to be captured on the page.
     // the following conditions must be hold to *not* capture it:
     // - corresponding document compatibility flag is set
-    // - it's a drawing object
+    // - it's a drawing object or it's a non-textbox wrap-though fly frame
     // - it doesn't follow the text flow
     {
-        mbDoNotCaptureAnchoredObj = !mbIsObjFly && !mbFollowTextFlow &&
+        bool bTextBox = SwTextBoxHelper::isTextBox(mpFrameFormat, RES_FLYFRMFMT);
+        bool bWrapThrough = mpFrameFormat->GetSurround().GetSurround() == css::text::WrapTextMode_THROUGH;
+        mbDoNotCaptureAnchoredObj = (!mbIsObjFly || (!bTextBox && bWrapThrough)) && !mbFollowTextFlow &&
                                     mpFrameFormat->getIDocumentSettingAccess().get(DocumentSettingId::DO_NOT_CAPTURE_DRAW_OBJS_ON_PAGE);
     }
 }