lok: show Math selection

Change-Id: I950ae3e5fb000d6acec4c26ff143b918a4e48a27
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/142342
Tested-by: Jenkins
Reviewed-by: Mike Kaganski <mike.kaganski@collabora.com>

2 files changed, 19 insertions, 9 deletions

diff --git a/starmath/inc/cursor.hxx b/starmath/inc/cursor.hxx
index a1491c5decfe..0a8a35071f10 100644
--- a/starmath/inc/cursor.hxx
+++ b/starmath/inc/cursor.hxx
@@ -187,6 +187,7 @@ public:
     void Draw(OutputDevice& pDev, Point Offset, bool isCaretVisible);
 
     tools::Rectangle GetCaretRectangle(OutputDevice& rOutDev) const;
+    tools::Rectangle GetSelectionRectangle(OutputDevice& rOutDev) const;
 
     bool IsAtTailOfBracket(SmBracketType eBracketType) const;
 
@@ -275,7 +276,7 @@ private:
     bool SetCaretPosition(SmCaretPos pos);
 
     /** Set selected on nodes of the tree */
-    void AnnotateSelection();
+    void AnnotateSelection() const;
 
     /** Clone list of nodes in a clipboard (creates a deep clone) */
     static std::unique_ptr<SmNodeList> CloneList(SmClipboard& rClipboard);
diff --git a/starmath/inc/visitors.hxx b/starmath/inc/visitors.hxx
index b29bb26fb5b0..eaf329034c7d 100644
--- a/starmath/inc/visitors.hxx
+++ b/starmath/inc/visitors.hxx
@@ -424,31 +424,40 @@ private:
 };
 
 
-// SmSelectionDrawingVisitor
+// SmSelectionRectanglesVisitor: collect selection
 
-class SmSelectionDrawingVisitor final : public SmDefaultingVisitor
+class SmSelectionRectanglesVisitor : public SmDefaultingVisitor
 {
 public:
-    /** Draws a selection on rDevice for the selection on pTree */
-    SmSelectionDrawingVisitor( OutputDevice& rDevice, SmNode* pTree, const Point& rOffset );
-    virtual ~SmSelectionDrawingVisitor() {}
+    SmSelectionRectanglesVisitor(OutputDevice& rDevice, SmNode* pTree);
+    virtual ~SmSelectionRectanglesVisitor() = default;
     void Visit( SmTextNode* pNode ) override;
     using SmDefaultingVisitor::Visit;
+
+    const tools::Rectangle& GetSelection() { return maSelectionArea; }
+
 private:
     /** Reference to drawing device */
     OutputDevice& mrDev;
-    /** True if  aSelectionArea have been initialized */
-    bool mbHasSelectionArea;
     /** The current area that is selected */
     tools::Rectangle maSelectionArea;
     /** Extend the area that must be selected  */
-    void ExtendSelectionArea(const tools::Rectangle& rArea);
+    void ExtendSelectionArea(const tools::Rectangle& rArea) { maSelectionArea.Union(rArea); }
     /** Default visiting method */
     void DefaultVisit( SmNode* pNode ) override;
     /** Visit the children of a given pNode */
     void VisitChildren( SmNode* pNode );
 };
 
+// SmSelectionDrawingVisitor
+
+class SmSelectionDrawingVisitor final : public SmSelectionRectanglesVisitor
+{
+public:
+    /** Draws a selection on rDevice for the selection on pTree */
+    SmSelectionDrawingVisitor( OutputDevice& rDevice, SmNode* pTree, const Point& rOffset );
+};
+
 // SmNodeToTextVisitor
 
 /** Extract command text from pNodes */