Qt5 IM report selected text and anchor

Implement the text selection IM queries. Never seen them, but
since the text querying code is already there, it's easy to
extend to include the selection. Anchor is the non-cursor
position of the selection and should return the cursor in case
of not selected text.

Change-Id: I0e49a8593a5a6c6268395857748b5fc304372210
Reviewed-on: https://gerrit.libreoffice.org/71797
Tested-by: Jenkins
Reviewed-by: Jan-Marek Glogowski <glogow@fbihome.de>

1 files changed, 46 insertions, 8 deletions

diff --git a/vcl/qt5/Qt5Widget.cxx b/vcl/qt5/Qt5Widget.cxx
index 8db1e05e6cf2..a073ab67158d 100644
--- a/vcl/qt5/Qt5Widget.cxx
+++ b/vcl/qt5/Qt5Widget.cxx
@@ -559,7 +559,8 @@ void Qt5Widget::inputMethodEvent(QInputMethodEvent* pEvent)
     pEvent->accept();
 }
 
-static bool lcl_retrieveSurrounding(sal_Int32& rPosition, QString* pText)
+static bool lcl_retrieveSurrounding(sal_Int32& rPosition, sal_Int32& rAnchor, QString* pText,
+                                    QString* pSelection)
 {
     vcl::Window* pFocusWin = Application::GetFocusWindow();
     if (!pFocusWin)
@@ -576,17 +577,39 @@ static bool lcl_retrieveSurrounding(sal_Int32& rPosition, QString* pText)
     {
         SAL_WARN("vcl.qt5", "Exception in getting input method surrounding text: " << e);
     }
+
+    bool result = false;
     if (xText.is())
     {
         rPosition = xText->getCaretPosition();
-        if (rPosition != -1 && pText)
+        if (rPosition != -1)
         {
-            *pText = toQString(xText->getText());
+            result = true;
+            if (pText)
+                *pText = toQString(xText->getText());
+
+            sal_Int32 nSelStart = xText->getSelectionStart();
+            sal_Int32 nSelEnd = xText->getSelectionEnd();
+            if (nSelStart == nSelEnd)
+            {
+                rAnchor = rPosition;
+                if (pSelection)
+                    result = false;
+            }
+            else
+            {
+                if (rPosition == nSelStart)
+                    rAnchor = nSelEnd;
+                else
+                    rAnchor = nSelStart;
+                if (pSelection)
+                    *pSelection = toQString(xText->getSelectedText());
+            }
             return true;
         }
     }
 
-    return false;
+    return result;
 }
 
 QVariant Qt5Widget::inputMethodQuery(Qt::InputMethodQuery property) const
@@ -596,15 +619,15 @@ QVariant Qt5Widget::inputMethodQuery(Qt::InputMethodQuery property) const
         case Qt::ImSurroundingText:
         {
             QString aText;
-            sal_Int32 nCursorPos;
-            if (lcl_retrieveSurrounding(nCursorPos, &aText))
+            sal_Int32 nCursorPos, nAnchor;
+            if (lcl_retrieveSurrounding(nCursorPos, nAnchor, &aText, nullptr))
                 return QVariant(aText);
             [[fallthrough]];
         }
         case Qt::ImCursorPosition:
         {
-            sal_Int32 nCursorPos;
-            if (lcl_retrieveSurrounding(nCursorPos, nullptr))
+            sal_Int32 nCursorPos, nAnchor;
+            if (lcl_retrieveSurrounding(nCursorPos, nAnchor, nullptr, nullptr))
                 return QVariant(nCursorPos);
             [[fallthrough]];
         }
@@ -615,6 +638,21 @@ QVariant Qt5Widget::inputMethodQuery(Qt::InputMethodQuery property) const
             return QVariant(
                 QRect(aPosEvent.mnX, aPosEvent.mnY, aPosEvent.mnWidth, aPosEvent.mnHeight));
         }
+        case Qt::ImAnchorPosition:
+        {
+            sal_Int32 nCursorPos, nAnchor;
+            if (lcl_retrieveSurrounding(nCursorPos, nAnchor, nullptr, nullptr))
+                return QVariant(nAnchor);
+            [[fallthrough]];
+        }
+        case Qt::ImCurrentSelection:
+        {
+            QString aSelection;
+            sal_Int32 nCursorPos, nAnchor;
+            if (lcl_retrieveSurrounding(nCursorPos, nAnchor, nullptr, &aSelection))
+                return QVariant(aSelection);
+            [[fallthrough]];
+        }
         default:
             return QWidget::inputMethodQuery(property);
     }