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/* This file is part of the KDE project
Copyright 1999-2006 The KSpread Team <calligra-devel@kde.org>
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public
License as published by the Free Software Foundation; either
version 2 of the License, or (at your option) any later version.
This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Library General Public License for more details.
You should have received a copy of the GNU Library General Public License
along with this library; see the file COPYING.LIB. If not, write to
the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
Boston, MA 02110-1301, USA.
*/
#ifndef CALLIGRA_SHEETS_FORMULA_EDITOR_HIGHLIGHTER
#define CALLIGRA_SHEETS_FORMULA_EDITOR_HIGHLIGHTER
#include <QSyntaxHighlighter>
class QTextEdit;
namespace Calligra
{
namespace Sheets
{
class Selection;
class Tokens;
/**
* Colors cell references in formulas. Installed by CellEditor instances in
* the constructor.
*/
class FormulaEditorHighlighter : public QSyntaxHighlighter
{
public:
/**
* Constructs a FormulaHighlighter to color-code cell references in a QTextEdit.
*
* @param textEdit The QTextEdit widget which the highlighter should operate on
* @param selection The Selection object
*/
FormulaEditorHighlighter(QTextEdit* textEdit, Selection* selection);
~FormulaEditorHighlighter() override;
/**
* Called automatically by KTextEditor to highlight text when modified.
*/
void highlightBlock(const QString& text) override;
/**
*
*/
const Tokens& formulaTokens() const;
/**
*
*/
uint rangeCount() const;
/**
* Returns true if any of the ranges or cells in the Formula.have changed since the
* last call to @ref FormulaEditorHighlighter::rangeChanged()
*/
bool rangeChanged() const;
/**
* Sets the highlighter's range changed flag to false.
*/
void resetRangeChanged();
protected:
/**
* Returns the position of the brace matching the one found at position pos
*/
int findMatchingBrace(int pos);
/**
* Examines the brace (Token::LeftPar or Token::RightPar) operator token at the given index in the token vector
* ( as returned by formulaTokens() ) and if the cursor is next to it, the token plus any matching brace will be highlighted
*/
void handleBrace(uint index);
private:
Q_DISABLE_COPY(FormulaEditorHighlighter)
class Private;
Private * const d;
};
} // namespace Sheets
} // namespace Calligra
#endif // CALLIGRA_SHEETS_FORMULA_EDITOR_HIGHLIGHTER
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