lok: IME: preserve formatting when inserting at the end of paragraph

There was a problem with inserting characters at the end of paragraph in
online.
When user set text to bolded, inserted few characters, then switched
bold off.
When trying to put another non-bolded character - the result was still
bolded.

It is caused by IME mechanics which gathers all elements for composition
and at the end deletes these characters and inserts again but using
document interface to keep undo records. During that operation
formatting has been lost.

This change does the same in reversed order so we first put new string
correctly formatted at the end. Then we remove old leftovers. In result
formatting is correct.

Change-Id: Ieb498afdbe42c0080c30ea3db994cedc98e89847
Signed-off-by: Szymon Kłos <szymon.klos@collabora.com>
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/121774
Tested-by: Jenkins CollaboraOffice <jenkinscollaboraoffice@gmail.com>

2 files changed, 121 insertions, 1 deletions

diff --git a/sw/qa/extras/tiledrendering/tiledrendering.cxx b/sw/qa/extras/tiledrendering/tiledrendering.cxx
index 3a79210430b0..4994797328b8 100644
--- a/sw/qa/extras/tiledrendering/tiledrendering.cxx
+++ b/sw/qa/extras/tiledrendering/tiledrendering.cxx
@@ -26,6 +26,7 @@
 #include <vcl/virdev.hxx>
 #include <editeng/editview.hxx>
 #include <editeng/outliner.hxx>
+#include <editeng/wghtitem.hxx>
 #include <svl/srchitem.hxx>
 #include <svl/slstitm.hxx>
 #include <svl/stritem.hxx>
@@ -118,6 +119,7 @@ public:
     void testTdf115088();
     void testRedlineField();
     void testIMESupport();
+    void testIMEFormattingAtEndOfParagraph();
     void testSplitNodeRedlineCallback();
     void testDeleteNodeRedlineCallback();
     void testVisCursorInvalidation();
@@ -193,6 +195,7 @@ public:
     CPPUNIT_TEST(testTdf115088);
     CPPUNIT_TEST(testRedlineField);
     CPPUNIT_TEST(testIMESupport);
+    CPPUNIT_TEST(testIMEFormattingAtEndOfParagraph);
     CPPUNIT_TEST(testSplitNodeRedlineCallback);
     CPPUNIT_TEST(testDeleteNodeRedlineCallback);
     CPPUNIT_TEST(testVisCursorInvalidation);
@@ -2245,6 +2248,112 @@ void SwTiledRenderingTest::testIMESupport()
     CPPUNIT_ASSERT_EQUAL(aInputs[aInputs.size() - 1].concat("Aaa bbb."), pShellCursor->GetPoint()->nNode.GetNode().GetTextNode()->GetText());
 }
 
+void SwTiledRenderingTest::testIMEFormattingAtEndOfParagraph()
+{
+    comphelper::LibreOfficeKit::setActive();
+    SwXTextDocument* pXTextDocument = createDoc("dummy.fodt");
+    VclPtr<vcl::Window> pDocWindow = pXTextDocument->getDocWindow();
+
+    SwView* pView = dynamic_cast<SwView*>(SfxViewShell::Current());
+    assert(pView);
+    SwWrtShell* pWrtShell = pView->GetWrtShellPtr();
+
+    // delete all characters
+
+    for (int i = 0; i < 9; i++)
+    {
+        pXTextDocument->postKeyEvent(LOK_KEYEVENT_KEYINPUT, 0, KEY_DELETE);
+        pXTextDocument->postKeyEvent(LOK_KEYEVENT_KEYUP, 0, KEY_DELETE);
+    }
+
+    Scheduler::ProcessEventsToIdle();
+
+    pDocWindow->PostExtTextInputEvent(VclEventId::ExtTextInput, "a");
+    pDocWindow->PostExtTextInputEvent(VclEventId::EndExtTextInput, "");
+
+    // status: "a"
+
+    comphelper::dispatchCommand(".uno:Bold", uno::Sequence<beans::PropertyValue>());
+    Scheduler::ProcessEventsToIdle();
+
+    pDocWindow->PostExtTextInputEvent(VclEventId::ExtTextInput, "b");
+    pDocWindow->PostExtTextInputEvent(VclEventId::EndExtTextInput, "");
+
+    pXTextDocument->postKeyEvent(LOK_KEYEVENT_KEYINPUT, 0, KEY_RETURN);
+    pXTextDocument->postKeyEvent(LOK_KEYEVENT_KEYUP, 0, KEY_RETURN);
+    Scheduler::ProcessEventsToIdle();
+
+    // status: "a<bold>b</bold>\n"
+
+    pDocWindow->PostExtTextInputEvent(VclEventId::ExtTextInput, "a");
+    pDocWindow->PostExtTextInputEvent(VclEventId::EndExtTextInput, "");
+
+    std::unique_ptr<SfxPoolItem> pItem;
+    pView->GetViewFrame()->GetBindings().QueryState(SID_ATTR_CHAR_WEIGHT, pItem);
+    auto pWeightItem = dynamic_cast<SvxWeightItem*>(pItem.get());
+    CPPUNIT_ASSERT(pWeightItem);
+
+    CPPUNIT_ASSERT_EQUAL(FontWeight::WEIGHT_BOLD, pWeightItem->GetWeight());
+
+    pXTextDocument->postKeyEvent(LOK_KEYEVENT_KEYINPUT, 0, KEY_RETURN);
+    pXTextDocument->postKeyEvent(LOK_KEYEVENT_KEYUP, 0, KEY_RETURN);
+    Scheduler::ProcessEventsToIdle();
+
+    // status: "a<bold>b</bold>\n
+    //          <bold>a</bold>\n"
+
+    comphelper::dispatchCommand(".uno:Bold", uno::Sequence<beans::PropertyValue>());
+    Scheduler::ProcessEventsToIdle();
+
+    pDocWindow->PostExtTextInputEvent(VclEventId::ExtTextInput, "b");
+    pDocWindow->PostExtTextInputEvent(VclEventId::EndExtTextInput, "");
+
+    pView->GetViewFrame()->GetBindings().QueryState(SID_ATTR_CHAR_WEIGHT, pItem);
+    auto pWeightItem2 = dynamic_cast<SvxWeightItem*>(pItem.get());
+    CPPUNIT_ASSERT(pWeightItem2);
+
+    CPPUNIT_ASSERT_EQUAL(FontWeight::WEIGHT_NORMAL, pWeightItem2->GetWeight());
+
+    // status: "a<bold>b</bold>\n
+    //          <bold>a</bold>\n"
+    //          b"
+
+    comphelper::dispatchCommand(".uno:Bold", uno::Sequence<beans::PropertyValue>());
+    Scheduler::ProcessEventsToIdle();
+
+    pDocWindow->PostExtTextInputEvent(VclEventId::ExtTextInput, "a");
+    pDocWindow->PostExtTextInputEvent(VclEventId::EndExtTextInput, "");
+
+    pView->GetViewFrame()->GetBindings().QueryState(SID_ATTR_CHAR_WEIGHT, pItem);
+    auto pWeightItem3 = dynamic_cast<SvxWeightItem*>(pItem.get());
+    CPPUNIT_ASSERT(pWeightItem3);
+
+    CPPUNIT_ASSERT_EQUAL(FontWeight::WEIGHT_BOLD, pWeightItem3->GetWeight());
+
+    comphelper::dispatchCommand(".uno:Bold", uno::Sequence<beans::PropertyValue>());
+    Scheduler::ProcessEventsToIdle();
+
+    pDocWindow->PostExtTextInputEvent(VclEventId::ExtTextInput, "b");
+    pDocWindow->PostExtTextInputEvent(VclEventId::EndExtTextInput, "");
+
+    pView->GetViewFrame()->GetBindings().QueryState(SID_ATTR_CHAR_WEIGHT, pItem);
+    auto pWeightItem4 = dynamic_cast<SvxWeightItem*>(pItem.get());
+    CPPUNIT_ASSERT(pWeightItem4);
+
+    CPPUNIT_ASSERT_EQUAL(FontWeight::WEIGHT_NORMAL, pWeightItem4->GetWeight());
+
+    // status: "a<bold>b</bold>\n
+    //          <bold>a</bold>\n"
+    //          b<bold>a</bold>b"
+
+    // the cursor should be at position 3nd
+    SwShellCursor* pShellCursor = pWrtShell->getShellCursor(false);
+    CPPUNIT_ASSERT_EQUAL(static_cast<sal_Int32>(3), pShellCursor->GetPoint()->nContent.GetIndex());
+
+    // check the content
+    CPPUNIT_ASSERT_EQUAL(OUString("bab"), pShellCursor->GetPoint()->nNode.GetNode().GetTextNode()->GetText());
+}
+
 void SwTiledRenderingTest::testSplitNodeRedlineCallback()
 {
     // Load a document.
diff --git a/sw/source/core/doc/extinput.cxx b/sw/source/core/doc/extinput.cxx
index e9076064a745..4795862e9e1a 100644
--- a/sw/source/core/doc/extinput.cxx
+++ b/sw/source/core/doc/extinput.cxx
@@ -100,12 +100,23 @@ SwExtTextInput::~SwExtTextInput()
             }
             else
             {
-                pTNd->EraseText( rIdx, nEndCnt - nSttCnt );
+                // we need to keep correct formatting
+                // ie. when we erase first, then we will lost information about format
+                // so:
+                // 0. initial status: xxxx | OLD
+                // 1. insert new content using Doc interface at the end so we will use the same formatting
+                //            status: xxxx | OLD | NEW
+                // 2. erase old content which is placed at "start" position and before recently inserted text
+                //            status: xxxx | NEW
+
+                sal_Int32 nLenghtOfOldString = nEndCnt - nSttCnt;
 
                 if( bInsText )
                 {
                     pDoc->getIDocumentContentOperations().InsertString( *this, sText );
                 }
+
+                pTNd->EraseText( rIdx, nLenghtOfOldString );
             }
             pDoc->GetIDocumentUndoRedo().DoGroupUndo(bKeepGroupUndo);
             if (eInputLanguage != LANGUAGE_DONTKNOW)