/***************************************************************************
 *   Copyright (C) 2004 by Enrico Ros <eros.kde@email.it>                  *
 *                                                                         *
 *   This program is free software; you can redistribute it and/or modify  *
 *   it under the terms of the GNU General Public License as published by  *
 *   the Free Software Foundation; either version 2 of the License, or     *
 *   (at your option) any later version.                                   *
 ***************************************************************************/

#ifndef _OKULAR_ACTION_H_
#define _OKULAR_ACTION_H_

#include "global.h"
#include "okularcore_export.h"

#include <QString>
#include <QVariant>

namespace Okular
{
class ActionPrivate;
class GotoActionPrivate;
class ExecuteActionPrivate;
class BrowseActionPrivate;
class DocumentActionPrivate;
class SoundActionPrivate;
class ScriptActionPrivate;
class MovieActionPrivate;
class RenditionActionPrivate;
class MovieAnnotation;
class ScreenAnnotation;
class Movie;
class Sound;
class DocumentViewport;

/**
 * @short Encapsulates data that describes an action.
 *
 * This is the base class for actions. It makes mandatory for inherited
 * widgets to reimplement the 'actionType' method and return the type of
 * the action described by the reimplemented class.
 */
class OKULARCORE_EXPORT Action
{
public:
    /**
     * Describes the type of action.
     */
    enum ActionType {
        Goto,         ///< Goto a given page or external document
        Execute,      ///< Execute a command or external application
        Browse,       ///< Browse a given website
        DocAction,    ///< Start a custom action
        Sound,        ///< Play a sound
        Movie,        ///< Play a movie
        Script,       ///< Executes a Script code
        Rendition,    ///< Play a movie and/or execute a Script code @since 0.16 (KDE 4.10)
        BackendOpaque ///< Calls back to the backend with the action @since 1.1
    };

    /**
     * Destroys the action.
     */
    virtual ~Action();

    /**
     * Returns the type of the action. Every inherited class must return
     * an unique identifier.
     *
     * @see ActionType
     */
    virtual ActionType actionType() const = 0;

    /**
     * Returns a i18n'ed tip of the action that is presented to
     * the user.
     */
    virtual QString actionTip() const;

    /**
     * Sets the "native" @p id of the action.
     *
     * This is for use of the Generator, that can optionally store an
     * handle (a pointer, an identifier, etc) of the "native" action
     * object, if any.
     *
     * @note Okular makes no use of this
     *
     * @since 0.15 (KDE 4.9)
     */
    void setNativeId(const QVariant &id);

    /**
     * Returns the "native" id of the action.
     *
     * @since 0.15 (KDE 4.9)
     */
    QVariant nativeId() const;

    /**
     * Returns the next actions to be executed after.
     *
     * @since 1.5
     */
    QVector<Action *> nextActions() const;

    /**
     * Sets the next actions.
     *
     * Takes ownership of the objects in the actions vector.
     * @since 1.5
     */
    void setNextActions(const QVector<Action *> &actions);

protected:
    /// @cond PRIVATE
    Action(ActionPrivate &dd);
    Q_DECLARE_PRIVATE(Action)
    ActionPrivate *d_ptr;
    /// @endcond

private:
    Q_DISABLE_COPY(Action)
};

/**
 * The Goto action changes the viewport to another page
 * or loads an external document.
 */
class OKULARCORE_EXPORT GotoAction : public Action
{
public:
    /**
     * Creates a new goto action.
     *
     * @p fileName The name of an external file that shall be loaded.
     * @p viewport The target viewport information of the current document.
     */
    GotoAction(const QString &fileName, const DocumentViewport &viewport);

    /**
     * Creates a new goto action.
     *
     * @p fileName The name of an external file that shall be loaded.
     * @p namedDestination The target named destination for the target document.
     *
     * @since 0.9 (KDE 4.3)
     */
    GotoAction(const QString &fileName, const QString &namedDestination);

    /**
     * Destroys the goto action.
     */
    ~GotoAction() override;

    /**
     * Returns the action type.
     */
    ActionType actionType() const override;

    /**
     * Returns the action tip.
     */
    QString actionTip() const override;

    /**
     * Returns whether the goto action points to an external document.
     */
    bool isExternal() const;

    /**
     * Returns the filename of the external document.
     */
    QString fileName() const;

    /**
     * Returns the document viewport the goto action points to.
     */
    DocumentViewport destViewport() const;

    /**
     * Returns the document named destination the goto action points to.
     *
     * @since 0.9 (KDE 4.3)
     */
    QString destinationName() const;

private:
    Q_DECLARE_PRIVATE(GotoAction)
    Q_DISABLE_COPY(GotoAction)
};

/**
 * The Execute action executes an external application.
 */
class OKULARCORE_EXPORT ExecuteAction : public Action
{
public:
    /**
     * Creates a new execute action.
     *
     * @param fileName The file name of the application to execute.
     * @param parameters The parameters of the application to execute.
     */
    ExecuteAction(const QString &fileName, const QString &parameters);

    /**
     * Destroys the execute action.
     */
    ~ExecuteAction() override;

    /**
     * Returns the action type.
     */
    ActionType actionType() const override;

    /**
     * Returns the action tip.
     */
    QString actionTip() const override;

    /**
     * Returns the file name of the application to execute.
     */
    QString fileName() const;

    /**
     * Returns the parameters of the application to execute.
     */
    QString parameters() const;

private:
    Q_DECLARE_PRIVATE(ExecuteAction)
    Q_DISABLE_COPY(ExecuteAction)
};

/**
 * The Browse action browses an url by opening a web browser or
 * email client, depending on the url protocol (e.g. http, mailto, etc.).
 */
class OKULARCORE_EXPORT BrowseAction : public Action
{
public:
    /**
     * Creates a new browse action.
     *
     * @param url The url to browse.
     */
    explicit BrowseAction(const QUrl &url);

    /**
     * Destroys the browse action.
     */
    ~BrowseAction() override;

    /**
     * Returns the action type.
     */
    ActionType actionType() const override;

    /**
     * Returns the action tip.
     */
    QString actionTip() const override;

    /**
     * Returns the url to browse.
     */
    QUrl url() const;

private:
    Q_DECLARE_PRIVATE(BrowseAction)
    Q_DISABLE_COPY(BrowseAction)
};

/**
 * The DocumentAction action contains an action that is performed on
 * the current document.
 */
class OKULARCORE_EXPORT DocumentAction : public Action
{
public:
    /**
     * Describes the possible action types.
     *
     * WARNING KEEP IN SYNC WITH POPPLER!
     */
    enum DocumentActionType {
        PageFirst = 1,       ///< Jump to first page
        PagePrev = 2,        ///< Jump to previous page
        PageNext = 3,        ///< Jump to next page
        PageLast = 4,        ///< Jump to last page
        HistoryBack = 5,     ///< Go back in page history
        HistoryForward = 6,  ///< Go forward in page history
        Quit = 7,            ///< Quit application
        Presentation = 8,    ///< Start presentation
        EndPresentation = 9, ///< End presentation
        Find = 10,           ///< Open find dialog
        GoToPage = 11,       ///< Goto page
        Close = 12           ///< Close document
    };

    /**
     * Creates a new document action.
     *
     * @param documentActionType The type of document action.
     */
    explicit DocumentAction(enum DocumentActionType documentActionType);

    /**
     * Destroys the document action.
     */
    ~DocumentAction() override;

    /**
     * Returns the action type.
     */
    ActionType actionType() const override;

    /**
     * Returns the action tip.
     */
    QString actionTip() const override;

    /**
     * Returns the type of action.
     */
    DocumentActionType documentActionType() const;

private:
    Q_DECLARE_PRIVATE(DocumentAction)
    Q_DISABLE_COPY(DocumentAction)
};

/**
 * The Sound action plays a sound on activation.
 */
class OKULARCORE_EXPORT SoundAction : public Action
{
public:
    /**
     * Creates a new sound action.
     *
     * @param volume The volume of the sound.
     * @param synchronous Whether the sound shall be played synchronous.
     * @param repeat Whether the sound shall be repeated.
     * @param mix Whether the sound shall be mixed.
     * @param sound The sound object which contains the sound data.
     */
    SoundAction(double volume, bool synchronous, bool repeat, bool mix, Okular::Sound *sound);

    /**
     * Destroys the sound action.
     */
    ~SoundAction() override;

    /**
     * Returns the action type.
     */
    ActionType actionType() const override;

    /**
     * Returns the action tip.
     */
    QString actionTip() const override;

    /**
     * Returns the volume of the sound.
     */
    double volume() const;

    /**
     * Returns whether the sound shall be played synchronous.
     */
    bool synchronous() const;

    /**
     * Returns whether the sound shall be repeated.
     */
    bool repeat() const;

    /**
     * Returns whether the sound shall be mixed.
     */
    bool mix() const;

    /**
     * Returns the sound object which contains the sound data.
     */
    Okular::Sound *sound() const;

private:
    Q_DECLARE_PRIVATE(SoundAction)
    Q_DISABLE_COPY(SoundAction)
};

/**
 * The Script action executes a Script code.
 *
 * @since 0.7 (KDE 4.1)
 */
class OKULARCORE_EXPORT ScriptAction : public Action
{
public:
    /**
     * Creates a new Script action.
     *
     * @param type The type of the script (for now, only JavaScript = 0 is implemented).
     * @param script The code to execute.
     */
    ScriptAction(enum ScriptType type, const QString &script);

    /**
     * Destroys the browse action.
     */
    ~ScriptAction() override;

    /**
     * Returns the action type.
     */
    ActionType actionType() const override;

    /**
     * Returns the action tip.
     */
    QString actionTip() const override;

    /**
     * Returns the type of action.
     */
    ScriptType scriptType() const;

    /**
     * Returns the code.
     */
    QString script() const;

private:
    Q_DECLARE_PRIVATE(ScriptAction)
    Q_DISABLE_COPY(ScriptAction)
};

/**
 * The Movie action executes an operation on a video on activation.
 *
 * @since 0.15 (KDE 4.9)
 */
class OKULARCORE_EXPORT MovieAction : public Action
{
public:
    /**
     * Describes the possible operation types.
     */
    enum OperationType { Play, Stop, Pause, Resume };

    /**
     * Creates a new movie action.
     */
    explicit MovieAction(OperationType operation);

    /**
     * Destroys the movie action.
     */
    ~MovieAction() override;

    /**
     * Returns the action type.
     */
    ActionType actionType() const override;

    /**
     * Returns the action tip.
     */
    QString actionTip() const override;

    /**
     * Returns the operation type.
     */
    OperationType operation() const;

    /**
     * Sets the @p annotation that is associated with the movie action.
     */
    void setAnnotation(MovieAnnotation *annotation);

    /**
     * Returns the annotation or @c 0 if no annotation has been set.
     */
    MovieAnnotation *annotation() const;

private:
    Q_DECLARE_PRIVATE(MovieAction)
    Q_DISABLE_COPY(MovieAction)
};

/**
 * The Rendition action executes an operation on a video or
 * executes some JavaScript code on activation.
 *
 * @since 0.16 (KDE 4.10)
 */
class OKULARCORE_EXPORT RenditionAction : public Action
{
public:
    /**
     * Describes the possible operation types.
     */
    enum OperationType {
        None,  ///< Execute only the JavaScript
        Play,  ///< Start playing the video
        Stop,  ///< Stop playing the video
        Pause, ///< Pause the video
        Resume ///< Resume playing the video
    };

    /**
     * Creates a new rendition action.
     *
     * @param operation The type of operation the action executes.
     * @param movie The movie object the action references.
     * @param scriptType The type of script the action executes.
     * @param script The actual script the action executes.
     */
    RenditionAction(OperationType operation, Okular::Movie *movie, enum ScriptType scriptType, const QString &script);

    /**
     * Destroys the rendition action.
     */
    ~RenditionAction() override;

    /**
     * Returns the action type.
     */
    ActionType actionType() const override;

    /**
     * Returns the action tip.
     */
    QString actionTip() const override;

    /**
     * Returns the operation type.
     */
    OperationType operation() const;

    /**
     * Returns the movie object or @c 0 if no movie object was set on construction time.
     */
    Okular::Movie *movie() const;

    /**
     * Returns the type of script.
     */
    ScriptType scriptType() const;

    /**
     * Returns the script code.
     */
    QString script() const;

    /**
     * Sets the @p annotation that is associated with the rendition action.
     */
    void setAnnotation(ScreenAnnotation *annotation);

    /**
     * Returns the annotation or @c 0 if no annotation has been set.
     */
    ScreenAnnotation *annotation() const;

private:
    Q_DECLARE_PRIVATE(RenditionAction)
    Q_DISABLE_COPY(RenditionAction)
};

class OKULARCORE_EXPORT BackendOpaqueAction : public Action
{
public:
    BackendOpaqueAction();

    /**
     * Returns the action type.
     */
    ActionType actionType() const override;

private:
    Q_DISABLE_COPY(BackendOpaqueAction)
};

}

#endif
