[LyX/master] const correctness

[Georg Baum]

commit a4b8094aac6d8b8ad498c02b4f762ee727c43144
Author: Georg Baum <b...@lyx.org>
Date:   Mon Jun 20 22:00:05 2016 +0200

    const correctness
    
    It is dangerous to hand out non-const pointers to members from a const 
method.

diff --git a/src/insets/InsetTabular.cpp b/src/insets/InsetTabular.cpp
index 7ad8663..54b4158 100644
--- a/src/insets/InsetTabular.cpp
+++ b/src/insets/InsetTabular.cpp
@@ -525,7 +525,7 @@ string const featureAsString(Tabular::Feature action)
 }
 
 
-DocIterator separatorPos(InsetTableCell * cell, docstring const & align_d)
+DocIterator separatorPos(InsetTableCell const * cell, docstring const & 
align_d)
 {
        DocIterator dit = doc_iterator_begin(&(cell->buffer()), cell);
        for (; dit; dit.forwardChar())
@@ -2308,7 +2308,7 @@ void Tabular::TeXCellPreamble(otexstream & os, idx_type 
cell,
        // we center in multicol when no decimal point
        if (column_info[c].alignment == LYX_ALIGN_DECIMAL) {
                docstring const align_d = column_info[c].decimal_point;
-               DocIterator const dit = separatorPos(cellInset(cell).get(), 
align_d);
+               DocIterator const dit = separatorPos(cellInset(cell), align_d);
                ismulticol |= !dit;
        }
 
@@ -2533,7 +2533,7 @@ void Tabular::TeXRow(otexstream & os, row_type row,
                     OutputParams const & runparams) const
 {
        idx_type cell = cellIndex(row, 0);
-       shared_ptr<InsetTableCell> inset = cellInset(cell);
+       InsetTableCell const * inset = cellInset(cell);
        Paragraph const & par = inset->paragraphs().front();
        string const lang = par.getParLanguage(buffer().params())->lang();
 
@@ -2572,7 +2572,7 @@ void Tabular::TeXRow(otexstream & os, row_type row,
                }
 
                TeXCellPreamble(os, cell, ismulticol, ismultirow);
-               shared_ptr<InsetTableCell> inset = cellInset(cell);
+               InsetTableCell const * inset = cellInset(cell);
 
                Paragraph const & par = inset->paragraphs().front();
 
@@ -3321,21 +3321,26 @@ void Tabular::plaintext(odocstringstream & os,
 }
 
 
-shared_ptr<InsetTableCell> Tabular::cellInset(idx_type cell) const
+shared_ptr<InsetTableCell> Tabular::cellInset(idx_type cell)
 {
        return cell_info[cellRow(cell)][cellColumn(cell)].inset;
 }
 
 
-shared_ptr<InsetTableCell> Tabular::cellInset(row_type row,
-                                              col_type column) const
+shared_ptr<InsetTableCell> Tabular::cellInset(row_type row, col_type column)
 {
        return cell_info[row][column].inset;
 }
 
 
+InsetTableCell const * Tabular::cellInset(idx_type cell) const
+{
+       return cell_info[cellRow(cell)][cellColumn(cell)].inset.get();
+}
+
+
 void Tabular::setCellInset(row_type row, col_type column,
-                             shared_ptr<InsetTableCell> ins) const
+                           shared_ptr<InsetTableCell> ins)
 {
        CellData & cd = cell_info[row][column];
        cd.inset = ins;
diff --git a/src/insets/InsetTabular.h b/src/insets/InsetTabular.h
index b23fc85..ee5cffc 100644
--- a/src/insets/InsetTabular.h
+++ b/src/insets/InsetTabular.h
@@ -612,13 +612,13 @@ public:
        /// returns the VISIBLE cell at r,c, which may be the same as the
        /// cell at the previous row or column, if we're dealing with some
        /// multirow or multicell.
-       shared_ptr<InsetTableCell> cellInset(idx_type cell) const;
-       shared_ptr<InsetTableCell> cellInset(row_type row,
-                                                 col_type column) const;
+       shared_ptr<InsetTableCell> cellInset(idx_type cell);
+       shared_ptr<InsetTableCell> cellInset(row_type row, col_type column);
+       InsetTableCell const * cellInset(idx_type cell) const;
        //@}
        ///
        void setCellInset(row_type row, col_type column,
-                         shared_ptr<InsetTableCell>) const;
+                         shared_ptr<InsetTableCell>);
        /// Search for \param inset in the tabular, with the
        ///
        void validate(LaTeXFeatures &) const;