tdf#73691 - add alt-x support to calc

Alt-X (Unicode notation toggling) was added to Writer
and Draw/Impress in earlier.  This adds it to Calc as well.

Change-Id: Ieb5188b9ff35cb35941c36d22292069723df80b6
Reviewed-on: https://gerrit.libreoffice.org/18558Tested-by: Jenkins <ci@libreoffice.org>
Reviewed-by: Samuel Mehrbrodt <Samuel.Mehrbrodt@cib.de>
Tested-by: Samuel Mehrbrodt <Samuel.Mehrbrodt@cib.de>

sc/sdi/editsh.sdi

@@ -43,6 +43,8 @@ interface TableText
     SID_REDO            [ ExecMethod = ExecuteUndo; StateMethod = GetUndoState; Export = FALSE; ]
     SID_REPEAT          [ ExecMethod = ExecuteUndo; StateMethod = GetUndoState; Export = FALSE; ]
 
+    SID_UNICODE_NOTATION_TOGGLE [ ExecMethod = Execute; Export = FALSE; ]
+
      // ---- Attribute:
     SID_ATTR_CHAR_FONT          [ ExecMethod = ExecuteAttr; StateMethod = GetAttrState; Export = FALSE; ]
     SID_ATTR_CHAR_FONTHEIGHT    [ ExecMethod = ExecuteAttr; StateMethod = GetAttrState; Export = FALSE; ]

sc/sdi/scalc.sdi

@@ -8903,6 +8903,30 @@ SfxVoidItem ConvertFormulaToValue SID_CONVERT_FORMULA_TO_VALUE
     GroupId = GID_OPTIONS;
 ]
 
+SfxVoidItem UnicodeNotationToggle SID_UNICODE_NOTATION_TOGGLE
+()
+[
+    /* flags: */
+    AutoUpdate = FALSE,
+    Cachable = Cachable,
+    FastCall = FALSE,
+    HasCoreId = FALSE,
+    HasDialog = FALSE,
+    ReadOnlyDoc = FALSE,
+    Toggle = FALSE,
+    Container = FALSE,
+    RecordAbsolute = FALSE,
+    RecordPerSet;
+    Synchron;
+
+    /* config: */
+    AccelConfig = TRUE,
+    MenuConfig = FALSE,
+    StatusBarConfig = FALSE,
+    ToolBoxConfig = FALSE,
+    GroupId = GID_OPTIONS;
+]
+
 SfxVoidItem ShowDetail SID_OUTLINE_SHOW
 ()
 [

sc/source/ui/view/editsh.cxx

@@ -21,6 +21,7 @@
 #include <comphelper/string.hxx>
 #include "scitems.hxx"
 #include <editeng/eeitem.hxx>
+#include <i18nutil/unicode.hxx>
 
 #include <svx/clipfmtitem.hxx>
 #include <svx/svxdlg.hxx>
@@ -331,6 +332,46 @@ void ScEditShell::Execute( SfxRequest& rReq )
                 bSetModified = false;
             }
             return;
+        case SID_UNICODE_NOTATION_TOGGLE:
+            {
+                EditView* pActiveView = pHdl ? pHdl->GetActiveView() : pEditView;
+                if( pActiveView )
+                {
+                    OUString sInput = pEngine->GetText();
+                    ESelection aSel( pActiveView->GetSelection() );
+                    if( aSel.HasRange() )
+                        sInput = pActiveView->GetSelected();
+
+                    if( aSel.nStartPos > aSel.nEndPos )
+                        aSel.nEndPos = aSel.nStartPos;
+
+                    //calculate a valid end-position by reading logical characters
+                    sal_Int32 nUtf16Pos=0;
+                    while( (nUtf16Pos < sInput.getLength()) && (nUtf16Pos < aSel.nEndPos) )
+                    {
+                        sInput.iterateCodePoints(&nUtf16Pos);
+                        if( nUtf16Pos > aSel.nEndPos )
+                            aSel.nEndPos = nUtf16Pos;
+                   }
+
+                    ToggleUnicodeCodepoint aToggle = ToggleUnicodeCodepoint();
+                    while( nUtf16Pos && aToggle.AllowMoreInput( sInput[nUtf16Pos-1]) )
+                        --nUtf16Pos;
+                    OUString sReplacement = aToggle.ReplacementString();
+                    if( !sReplacement.isEmpty() )
+                    {
+                        aSel.nStartPos = aSel.nEndPos - aToggle.StringToReplace().getLength();
+                        pTableView->SetSelection( aSel );
+                        pTableView->InsertText(sReplacement, true);
+                        if( pTopView )
+                        {
+                            pTopView->SetSelection( aSel );
+                            pTopView->InsertText(sReplacement, true);
+                        }
+                    }
+                }
+            }
+            break;
 
         case SID_CHARMAP:
             {