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** Copyright (C) 2014 Digia Plc and/or its subsidiary(-ies).
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** This file is part of Qt Creator.
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** General Public License version 2.1 as published by the Free Software
** Foundation and appearing in the file LICENSE.LGPL included in the
** packaging of this file.  Please review the following information to
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****************************************************************************/

#ifndef ITEXTEDITOR_H
#define ITEXTEDITOR_H

#include "texteditor_global.h"

#include "itextmark.h"

#include <coreplugin/textdocument.h>
#include <coreplugin/editormanager/editormanager.h>
#include <coreplugin/editormanager/ieditor.h>

#include <QMap>
#include <QIcon>

QT_BEGIN_NAMESPACE
class QIcon;
class QMenu;
class QPainter;
class QPoint;
class QRect;
class QTextBlock;
QT_END_NAMESPACE

namespace Utils { class CommentDefinition; }

namespace TextEditor {

class TEXTEDITOR_EXPORT BlockRange
{
public:
    BlockRange() : _first(0), _last(-1) {}
    BlockRange(int firstPosition, int lastPosition)
      : _first(firstPosition), _last(lastPosition)
    {}

    inline bool isNull() const { return _last < _first; }

    int first() const { return _first; }
    int last() const { return _last; }

private:
    int _first;
    int _last;
};


class TEXTEDITOR_EXPORT ITextEditorDocument : public Core::TextDocument
{
    Q_OBJECT
public:
    explicit ITextEditorDocument(QObject *parent = 0);

    virtual QString plainText() const = 0;
    virtual QString textAt(int pos, int length) const = 0;
    virtual QChar characterAt(int pos) const = 0;

    virtual ITextMarkable *markableInterface() const = 0;

    static QMap<QString, QString> openedTextDocumentContents();
    static QMap<QString, QTextCodec *> openedTextDocumentEncodings();

signals:
    void contentsChanged();
};

class TEXTEDITOR_EXPORT ITextEditor : public Core::IEditor
{
    Q_OBJECT
public:
    enum PositionOperation {
        Current = 1,
        EndOfLine = 2,
        StartOfLine = 3,
        Anchor = 4,
        EndOfDoc = 5
    };

    ITextEditor() {}

    virtual ITextEditorDocument *textDocument();

    /*! Returns the position at \a posOp in characters from the beginning of the document */
    virtual int position(PositionOperation posOp = Current, int at = -1) const = 0;
    /*! Converts the \a pos in characters from beginning of document to \a line and \a column */
    virtual void convertPosition(int pos, int *line, int *column) const = 0;
    /*! Returns the cursor rectangle in pixels at \a pos, or current position if \a pos = -1 */
    virtual QRect cursorRect(int pos = -1) const = 0;
    /*! Returns the amount of visible columns (in characters) in the editor */
    virtual int columnCount() const = 0;
    /*! Returns the amount of visible lines (in characters) in the editor */
    virtual int rowCount() const = 0;

    virtual QString selectedText() const = 0;

    /*! Removes \a length characters to the right of the cursor. */
    virtual void remove(int length) = 0;
    /*! Inserts the given string to the right of the cursor. */
    virtual void insert(const QString &string) = 0;
    /*! Replaces \a length characters to the right of the cursor with the given string. */
    virtual void replace(int length, const QString &string) = 0;
    /*! Sets current cursor position to \a pos. */
    virtual void setCursorPosition(int pos) = 0;
    /*! Selects text between current cursor position and \a toPos. */
    virtual void select(int toPos) = 0;

    virtual const Utils::CommentDefinition* commentDefinition() const = 0;

    enum MarkRequestKind {
        BreakpointRequest,
        BookmarkRequest,
        TaskMarkRequest
    };

signals:
    void markRequested(TextEditor::ITextEditor *editor, int line, TextEditor::ITextEditor::MarkRequestKind kind);
    void markContextMenuRequested(TextEditor::ITextEditor *editor, int line, QMenu *menu);
    void tooltipOverrideRequested(TextEditor::ITextEditor *editor, const QPoint &globalPos, int position, bool *handled);
    void tooltipRequested(TextEditor::ITextEditor *editor, const QPoint &globalPos, int position);
    void markTooltipRequested(TextEditor::ITextEditor *editor, const QPoint &globalPos, int line);
    void contextHelpIdRequested(TextEditor::ITextEditor *editor, int position);
};

} // namespace TextEditor

#endif // ITEXTEDITOR_H