tdf#105625: Allow Delete/Backspace to delete whole fieldmark

Previously, the fieldmarks couldn't be removed with backspace or
deletee when cursor was right/left to them.

After commits f72b866c9c and
c34fc4520d, deletion worked wrong
(it didn't delete the mark from mark manager; in case of text
field, it removed one field's boundary).

Now single backspace/delete properly removes the whole fieldmark,
replacing it with its contents if applicable.

Change-Id: Id26e6e4e40e274d9fd6f0224f3e2b4fe33c369b7
Reviewed-on: https://gerrit.libreoffice.org/33812
Tested-by: Jenkins <ci@libreoffice.org>
Reviewed-by: Mike Kaganski <mike.kaganski@collabora.com>

sw/qa/extras/uiwriter/uiwriter.cxx

@@ -4277,7 +4277,9 @@ void SwUiWriterTest::testTdf105625()
     SwWrtShell* pWrtShell = pDoc->GetDocShell()->GetWrtShell();
     uno::Reference<uno::XComponentContext> xComponentContext(comphelper::getProcessComponentContext());
     // Ensure correct initial setting
-    comphelper::ConfigurationHelper::writeDirectKey(xComponentContext, "org.openoffice.Office.Writer/", "Cursor/Option", "IgnoreProtectedArea", css::uno::Any(false), comphelper::EConfigurationModes::Standard);
+    comphelper::ConfigurationHelper::writeDirectKey(xComponentContext,
+        "org.openoffice.Office.Writer/", "Cursor/Option", "IgnoreProtectedArea",
+        css::uno::Any(false), comphelper::EConfigurationModes::Standard);
     // We should be able to edit at positions adjacent to fields.
     // Check if the start and the end of the 1st paragraph are not protected
     // (they are adjacent to FORMCHECKBOX)
@@ -4291,6 +4293,14 @@ void SwUiWriterTest::testTdf105625()
     pWrtShell->SttPara();
     pWrtShell->Right(CRSR_SKIP_CHARS, /*bSelect=*/true, 1, /*bBasicCall=*/false);
     CPPUNIT_ASSERT_EQUAL(true, pWrtShell->HasReadonlySel());
+    // Test deletion of whole field with single backspace
+    // Previously it only removed right boundary of FORMTEXT, or failed removal at all
+    const IDocumentMarkAccess* pMarksAccess = pDoc->getIDocumentMarkAccess();
+    sal_Int32 nMarksBefore = pMarksAccess->getAllMarksCount();
+    pWrtShell->EndPara();
+    pWrtShell->DelLeft();
+    sal_Int32 nMarksAfter = pMarksAccess->getAllMarksCount();
+    CPPUNIT_ASSERT_EQUAL(nMarksBefore, nMarksAfter + 1);
 }
 
 CPPUNIT_TEST_SUITE_REGISTRATION(SwUiWriterTest);

sw/source/uibase/wrtsh/delete.cxx

@@ -209,6 +209,17 @@ long SwWrtShell::DelLeft()
     }
     else
     {
+        // If we are just to the right to a fieldmark, then remove it completely
+        const SwPosition* aCurPos = GetCursor()->GetPoint();
+        SwPosition aPrevChar(*aCurPos);
+        --aPrevChar.nContent;
+        sw::mark::IFieldmark* pFm = getIDocumentMarkAccess()->getFieldmarkFor(aPrevChar);
+        if (pFm && pFm->GetMarkEnd() == *aCurPos)
+        {
+            getIDocumentMarkAccess()->deleteMark(pFm);
+            return 1;
+        }
+
         OpenMark();
         SwCursorShell::Left(1, CRSR_SKIP_CHARS);
     }
@@ -329,6 +340,15 @@ long SwWrtShell::DelRight()
                 // restore cursor
                 SwCursorShell::Pop( false );
             }
+
+            // If we are just ahead of a fieldmark, then remove it completely
+            sw::mark::IFieldmark* pFm = GetCurrentFieldmark();
+            if (pFm && pFm->GetMarkStart() == *GetCursor()->GetPoint())
+            {
+                getIDocumentMarkAccess()->deleteMark(pFm);
+                nRet = 1;
+                break;
+            }
         }
 
         OpenMark();