tdf#135338 sw layout: show FirstLeft on very first left page style.

Although extremely unlikely, the Left Page style can have a different
Left and FirstLeft. In the even more unlikely case that the document
starts off using a left-page-only style, then the first header
would not show on the first page, but only on all of the following
left-only pages.

So, of course, we want the very first visible page in the document
to show the defined First header/footer.

Change-Id: I7e74fdc085509fb8d6b80f36d1402309b9db9404
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/99862
Tested-by: Jenkins
Reviewed-by: Justin Luth <justin_luth@sil.org>
diff --git a/sw/qa/extras/odfexport/data/tdf135338_firstLeftPageFooter.odt b/sw/qa/extras/odfexport/data/tdf135338_firstLeftPageFooter.odt
new file mode 100644
index 0000000..4f98088
--- /dev/null
+++ b/sw/qa/extras/odfexport/data/tdf135338_firstLeftPageFooter.odt
Binary files differ
diff --git a/sw/qa/extras/odfexport/odfexport.cxx b/sw/qa/extras/odfexport/odfexport.cxx
index f74980e..e28ae25 100644
--- a/sw/qa/extras/odfexport/odfexport.cxx
+++ b/sw/qa/extras/odfexport/odfexport.cxx
@@ -1666,6 +1666,13 @@ DECLARE_ODFEXPORT_TEST(testTdf118393, "tdf118393.odt")
    CPPUNIT_ASSERT_EQUAL(OUString("Seite * von *"),   parseDump("/root/page[7]/footer/txt/text()"));
}

DECLARE_ODFEXPORT_TEST(testTdf135338_firstLeftPageFooter, "tdf135338_firstLeftPageFooter.odt")
{
    // The first page is a left page only style, but it should still show the first page footer
    // instead of the left footer text "EVEN/LEFT (Left page only)"
    CPPUNIT_ASSERT_EQUAL(OUString("First (Left page only)"),  parseDump("/root/page[2]/footer/txt/text()"));
}

DECLARE_ODFEXPORT_TEST(testGerrit13858, "gerrit13858.odt")
{
    CPPUNIT_ASSERT_EQUAL(1, getShapes());
diff --git a/sw/source/core/inc/frmtool.hxx b/sw/source/core/inc/frmtool.hxx
index 9710bfa..027fd6b 100644
--- a/sw/source/core/inc/frmtool.hxx
+++ b/sw/source/core/inc/frmtool.hxx
@@ -167,7 +167,7 @@ bool IsRightPageByNumber(SwRootFrame const& rLayout, sal_uInt16 nPageNum);

SwPageFrame *InsertNewPage( SwPageDesc &rDesc, SwFrame *pUpper,
                          bool isRightPage, bool bFirst, bool bInsertEmpty, bool bFootnote,
                          SwFrame *pSibling );
                          SwFrame *pSibling, bool bVeryFirstPage = false );

// connect Flys with page
void RegistFlys( SwPageFrame*, const SwLayoutFrame* );
diff --git a/sw/source/core/layout/frmtool.cxx b/sw/source/core/layout/frmtool.cxx
index 0ade3a3..1cadf5f 100644
--- a/sw/source/core/layout/frmtool.cxx
+++ b/sw/source/core/layout/frmtool.cxx
@@ -2998,7 +2998,8 @@ bool IsRightPageByNumber(SwRootFrame const& rLayout, sal_uInt16 const nPageNum)
SwPageFrame * InsertNewPage( SwPageDesc &rDesc, SwFrame *pUpper,
        bool const isRightPage, bool const bFirst, bool bInsertEmpty,
        bool const bFootnote,
                          SwFrame *pSibling )
        SwFrame *pSibling,
        bool const bVeryFirstPage )
{
    assert(pUpper);
    assert(pUpper->IsRootFrame());
@@ -3030,7 +3031,7 @@ SwPageFrame * InsertNewPage( SwPageDesc &rDesc, SwFrame *pUpper,
    // If there is no FrameFormat for this page, add an empty page
    if ( !pFormat )
    {
        pFormat = isRightPage ? rDesc.GetLeftFormat() : rDesc.GetRightFormat();
        pFormat = isRightPage ? rDesc.GetLeftFormat(bVeryFirstPage) : rDesc.GetRightFormat(bVeryFirstPage);
        OSL_ENSURE( pFormat, "Descriptor without any format?!" );
        bInsertEmpty = !bInsertEmpty;
    }
diff --git a/sw/source/core/layout/newfrm.cxx b/sw/source/core/layout/newfrm.cxx
index 07ba49b..a24a23bc 100644
--- a/sw/source/core/layout/newfrm.cxx
+++ b/sw/source/core/layout/newfrm.cxx
@@ -488,7 +488,7 @@ void SwRootFrame::Init( SwFrameFormat* pFormat )

    // Create a page and put it in the layout
    // The first page is always a right-page and always a first-page
    SwPageFrame *pPage = ::InsertNewPage(*pDesc, this, true, true, false, false, nullptr);
    SwPageFrame *pPage = ::InsertNewPage(*pDesc, this, true, true, false, false, nullptr, true);

    // Find the first page in the Bodytext section.
    SwLayoutFrame *pLay = pPage->FindBodyCont();