/* This file is part of the KDE project
 * Copyright (C) 2006-2009 Thomas Zander <zander@kde.org>
 * Copyright (C) 2008 Thorsten Zachmann <zachmann@kde.org>
 * Copyright (C) 2009 KO GmbH <cbo@kogmbh.com>
 * Copyright (C) 2011 Mojtaba Shahi Senobari <mojtaba.shahi3000@gmail.com>
 * Copyright (C) 2008, 2012 Pierre Stirnweiss <pstirnweiss@googlemail.org>
 * Copyright (C) 2014 Denis Kuplyakov <dener.kup@gmail.com>
 *
 * 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 KOTEXTTOOL_H
#define KOTEXTTOOL_H

#include "TextShape.h"
#include "KoPointedAt.h"

#include <KoToolBase.h>
#include <KoTextCommandBase.h>
#include <KoUnit.h>
#include <KoBorder.h>

#include <QClipboard>
#include <QHash>
#include <QTextBlock>
#include <QTextCursor>
#include <QTimer>
#include <QWeakPointer>
#include <QRectF>
#include <QPointer>

#include <TextEditingPluginContainer.h>

class InsertCharacter;
class KoChangeTracker;
class KoCharacterStyle;
class KoColor;
class KoColorPopupAction;
class KoParagraphStyle;
class KoStyleManager;
class KoTextEditor;
class UndoTextCommand;

class QAction;
class KActionMenu;
class KoFontFamilyAction;
class FontSizeAction;

class KUndo2Command;

class QDrag;
class QMimeData;

class MockCanvas;
class TextToolSelection;

/**
 * This is the tool for the text-shape (which is a flake-based plugin).
 */
class TextTool : public KoToolBase, public KoUndoableTool
{
    Q_OBJECT
public:
    explicit TextTool(KoCanvasBase *canvas);
#ifndef NDEBUG
    explicit TextTool(MockCanvas *canvas);
#endif
    ~TextTool() override;

    /// reimplemented from superclass
    void paint(QPainter &painter, const KoViewConverter &converter) override;

    /// reimplemented from superclass
    void mousePressEvent(KoPointerEvent *event) override;
    /// reimplemented from superclass
    void mouseDoubleClickEvent(KoPointerEvent *event) override;
    /// reimplemented from superclass
    void mouseTripleClickEvent(KoPointerEvent *event) override;
    /// reimplemented from superclass
    void mouseMoveEvent(KoPointerEvent *event) override;
    /// reimplemented from superclass
    void mouseReleaseEvent(KoPointerEvent *event) override;
    /// reimplemented from superclass
    void keyPressEvent(QKeyEvent *event) override;
    /// reimplemented from superclass
    void keyReleaseEvent(QKeyEvent *event) override;

    /// reimplemented from superclass
    void activate(ToolActivation toolActivation, const QSet<KoShape *> &shapes) override;
    /// reimplemented from superclass
    void deactivate() override;
    /// reimplemented from superclass
    void copy() const override;

    /// reimplemented from KoUndoableTool
    void setAddUndoCommandAllowed(bool allowed) override
    {
        m_allowAddUndoCommand = allowed;
    }

    ///reimplemented
    void deleteSelection() override;
    /// reimplemented from superclass
    void cut() override;
    /// reimplemented from superclass
    bool paste() override;
    /// reimplemented from superclass
    QStringList supportedPasteMimeTypes() const override;
    /// reimplemented from superclass
    void dragMoveEvent(QDragMoveEvent *event, const QPointF &point) override;
    /// reimplemented from superclass
    void dragLeaveEvent(QDragLeaveEvent *event) override;
    /// reimplemented from superclass
    void dropEvent(QDropEvent *event, const QPointF &point) override;

    /// reimplemented from superclass
    void repaintDecorations() override;

    /// reimplemented from superclass
    KoToolSelection *selection() override;
    /// reimplemented from superclass
    QList<QPointer<QWidget> > createOptionWidgets() override;

    /// reimplemented from superclass
    QVariant inputMethodQuery(Qt::InputMethodQuery query, const KoViewConverter &converter) const override;
    /// reimplemented from superclass
    void inputMethodEvent(QInputMethodEvent *event) override;

    /// The following two methods allow an undo/redo command to tell the tool, it will modify the QTextDocument and wants to be parent of the undo/redo commands resulting from these changes.

    void startEditing(KUndo2Command *command);

    void stopEditing();

    void setShapeData(KoTextShapeData *data);

    QRectF caretRect(QTextCursor *cursor, bool *upToDate = 0) const;

    QRectF textRect(QTextCursor &cursor) const;

protected:
    virtual void createActions();
    TextShape *textShape()
    {
        return m_textShape;
    }

    friend class SimpleParagraphWidget;
    friend class ParagraphSettingsDialog;

    KoTextEditor *textEditor()
    {
        return m_textEditor.data();
    }

public Q_SLOTS:
    /// Insert comment to document.
    void insertAnnotation();
    /// start the textedit-plugin.
    void startTextEditingPlugin(const QString &pluginId);
    /// reimplemented from KoToolBase
    void canvasResourceChanged(int key, const QVariant &res) override;

Q_SIGNALS:
    /// emitted every time a different styleManager is set.
    void styleManagerChanged(KoStyleManager *manager);
    /// emitted every time a caret move leads to a different character format being under the caret
    void charFormatChanged(const QTextCharFormat &format, const QTextCharFormat &refBlockCharFormat);
    /// emitted every time a caret move leads to a different paragraph format being under the caret
    void blockFormatChanged(const QTextBlockFormat &format);
    /// emitted every time a caret move leads to a different paragraph format being under the caret
    void blockChanged(const QTextBlock &block);

private Q_SLOTS:
    /// inserts new paragraph and includes it into the new section
    void insertNewSection();
    /// configures params of the current section
    void configureSection();
    /// inserts paragraph between sections bounds
    void splitSections();
    /// paste text from the clipboard without formatting
    void pasteAsText();
    /// make the selected text bold or not
    void bold(bool);
    /// make the selected text italic or not
    void italic(bool);
    /// underline of the selected text
    void underline(bool underline);
    /// strikethrough of the selected text
    void strikeOut(bool strikeOut);
    /// insert a non breaking space at the caret position
    void nonbreakingSpace();
    /// insert a non breaking hyphen at the caret position
    void nonbreakingHyphen();
    /// insert a soft hyphen at the caret position
    void softHyphen();
    /// insert a linebreak at the caret position
    void lineBreak();
    /// force the remainder of the text into the next page
    void insertFrameBreak();
    /// align all of the selected text left
    void alignLeft();
    /// align all of the selected text right
    void alignRight();
    /// align all of the selected text centered
    void alignCenter();
    /// align all of the selected text block-justified
    void alignBlock();
    /// make the selected text switch to be super-script
    void superScript(bool);
    /// make the selected text switch to be sub-script
    void subScript(bool);
    /// move the paragraph indent of the selected text to be less (left on LtR text)
    void decreaseIndent();
    /// move the paragraph indent of the selected text to be more (right on LtR text)
    void increaseIndent();
    /// Increase the font size. This will preserve eventual difference in font size within the selection.
    void increaseFontSize();
    /// Decrease font size. See above.
    void decreaseFontSize();
    /// Set font family
    void setFontFamily(const QString &);
    /// Set Font size
    void setFontSize(qreal size);
    /// see KoTextEditor::insertIndexMarker
    void insertIndexMarker();
    /// shows a dialog to insert a table
    void insertTable();
    /// insert a table of given dimensions
    void insertTableQuick(int rows, int columns);
    /// insert a row above
    void insertTableRowAbove();
    /// insert a row below
    void insertTableRowBelow();
    /// insert a column left
    void insertTableColumnLeft();
    /// insert a column right
    void insertTableColumnRight();
    /// delete a column
    void deleteTableColumn();
    /// delete a row
    void deleteTableRow();
    /// merge table cells
    void mergeTableCells();
    /// split previous merged table cells
    void splitTableCells();
    /// format the table border (enter table pen mode)
    void setTableBorderData(const KoBorder::BorderData &data);
    /// shows a dialog to alter the paragraph properties
    void formatParagraph();
    /// select all text in the current document.
    void selectAll();
    /// show the style manager
    void showStyleManager(int styleId = -1);
    /// change color of a selected text
    void setTextColor(const KoColor &color);
    /// change background color of a selected text
    void setBackgroundColor(const KoColor &color);
    /// Enable or disable grow-width-to-fit-text.
    void setGrowWidthToFit(bool enabled);
    /// Enable or disable grow-height-to-fit-text.
    void setGrowHeightToFit(bool enabled);
    /// Enable or disable shrink-to-fit-text.
    void setShrinkToFit(bool enabled);
    /// set Paragraph style of current selection. Existing style will be completely overridden.
    void setStyle(KoParagraphStyle *syle);
    /// set the characterStyle of the current selection. see above.
    void setStyle(KoCharacterStyle *style);
    /// set the level of current selected list
    void setListLevel(int level);

    /// slot to call when a series of commands is started that together need to become 1 undo action.
    void startMacro(const QString &title);
    /// slot to call when a series of commands has ended that together should be 1 undo action.
    void stopMacro();

    /// show the insert special character docker.
    void insertSpecialCharacter();
    /// insert string
    void insertString(const QString &string);

    /// returns the focus to canvas when styles are selected in the optionDocker
    void returnFocusToCanvas();

    void selectFont();
    void shapeAddedToCanvas();

    void blinkCaret();
    void relayoutContent();

    // called when the m_textShapeData has been deleted.
    void shapeDataRemoved();

    //Show tooltip with editing info
    void showEditTip();

    /// print debug about the details of the text document
    void debugTextDocument();
    /// print debug about the details of the styles on the current text document
    void debugTextStyles();

    void ensureCursorVisible(bool moveView = true);

    void createStyleFromCurrentBlockFormat(const QString &name);
    void createStyleFromCurrentCharFormat(const QString &name);

    void testSlot(bool);

    /// change block text direction
    void textDirectionChanged();

    void updateActions();

private:
    void repaintCaret();
    void repaintSelection();
    KoPointedAt hitTest(const QPointF &point) const;
    void updateStyleManager();
    void updateSelectedShape(const QPointF &point, bool noDocumentChange);
    void updateSelectionHandler();
    void editingPluginEvents();
    void finishedWord();
    void finishedParagraph();
    void startingSimpleEdit();
    void runUrl(KoPointerEvent *event, QString &url);
    void useTableBorderCursor();

    QMimeData *generateMimeData() const;

    TextEditingPluginContainer *textEditingPluginContainer();

private:
    friend class UndoTextCommand;
    friend class ChangeTracker;
    friend class TextCutCommand;
    friend class ShowChangesCommand;

    TextShape *m_textShape; // where caret of m_textEditor currently is
    KoTextShapeData *m_textShapeData; // where caret of m_textEditor currently is
    QWeakPointer<KoTextEditor> m_textEditor;
    QWeakPointer<KoTextEditor> m_oldTextEditor;
    KoChangeTracker *m_changeTracker;
    KoUnit m_unit;
    bool m_allowActions;
    bool m_allowAddUndoCommand;
    bool m_allowResourceManagerUpdates;
    int m_prevCursorPosition; /// used by editingPluginEvents
    int m_prevMouseSelectionStart, m_prevMouseSelectionEnd;

    QTimer m_caretTimer;
    bool m_caretTimerState;
    QAction *m_actionPasteAsText;
    QAction *m_actionFormatBold;
    QAction *m_actionFormatItalic;
    QAction *m_actionFormatUnderline;
    QAction *m_actionFormatStrikeOut;
    QAction *m_actionAlignLeft;
    QAction *m_actionAlignRight;
    QAction *m_actionAlignCenter;
    QAction *m_actionAlignBlock;
    QAction *m_actionFormatSuper;
    QAction *m_actionFormatSub;
    QAction *m_actionFormatIncreaseIndent;
    QAction *m_actionFormatDecreaseIndent;
    QAction *m_growWidthAction;
    QAction *m_growHeightAction;
    QAction *m_shrinkToFitAction;
    QAction *m_actionChangeDirection;
    QAction *m_actionInsertSection;
    QAction *m_actionConfigureSection;
    QAction *m_actionSplitSections;
    KActionMenu *m_variableMenu;

    FontSizeAction *m_actionFormatFontSize;
    KoFontFamilyAction *m_actionFormatFontFamily;
    KoColorPopupAction *m_actionFormatTextColor;
    KoColorPopupAction *m_actionFormatBackgroundColor;

    KUndo2Command *m_currentCommand; //this command will be the direct parent of undoCommands generated as the result of QTextDocument changes

    bool m_currentCommandHasChildren;

    InsertCharacter *m_specialCharacterDocker;

    QPointer<TextEditingPluginContainer> m_textEditingPlugins;

    bool m_textTyping;
    bool m_textDeleting;

    QTimer m_editTipTimer;
    KoPointedAt m_editTipPointedAt;
    QPoint m_editTipPos;

    bool m_delayedEnsureVisible;
    TextToolSelection *m_toolSelection;

    KoPointedAt m_tableDragInfo;
    bool m_tableDraggedOnce;
    bool m_tableDragWithShift;
    QPointF m_draggingOrigin;
    qreal m_dx;
    qreal m_dy;
    bool m_tablePenMode;
    KoBorder::BorderData m_tablePenBorderData;
    mutable QRectF m_lastImMicroFocus;

    bool m_clickWithinSelection;
    QDrag *m_drag;
    QAbstractTextDocumentLayout::Selection m_preDragSelection;
};

#endif
