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57 lines
1.4 KiB
C++
57 lines
1.4 KiB
C++
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/**
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* \file text_funcs.C
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* This file is part of LyX, the document processor.
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* Licence details can be found in the file COPYING.
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*
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* \author Lars Gullik Bj<EFBFBD>nnes
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* \author John Levon
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*
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* Full author contact details are available in file CREDITS
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*
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* This file contains some utility functions for actually mutating
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* the text contents of a document
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*/
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#include <config.h>
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#include "lyxtext.h"
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#include "paragraph.h"
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#include "lyxcursor.h"
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#include "undo_funcs.h"
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using lyx::pos_type;
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void transposeChars(LyXText & text, LyXCursor const & cursor)
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{
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Paragraph * tmppar = cursor.par();
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setUndo(text.bv(), Undo::FINISH, tmppar, tmppar->next());
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pos_type tmppos = cursor.pos();
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// First decide if it is possible to transpose at all
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if (tmppos == 0 || tmppos == tmppar->size())
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return;
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if (isDeletedText(*tmppar, tmppos - 1)
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|| isDeletedText(*tmppar, tmppos))
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return;
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unsigned char c1 = tmppar->getChar(tmppos);
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unsigned char c2 = tmppar->getChar(tmppos - 1);
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// We should have an implementation that handles insets
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// as well, but that will have to come later. (Lgb)
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if (c1 == Paragraph::META_INSET || c2 == Paragraph::META_INSET)
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return;
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bool const erased = tmppar->erase(tmppos - 1, tmppos + 1);
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pos_type const ipos(erased ? tmppos - 1 : tmppos + 1);
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tmppar->insertChar(ipos, c1);
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tmppar->insertChar(ipos + 1, c2);
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text.checkParagraph(tmppar, tmppos);
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}
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