/*
 * Copyright 2002-2006, project beam (http://sourceforge.net/projects/beam).
 * All rights reserved. Distributed under the terms of the MIT License.
 *
 * Authors:
 *              Oliver Tappe <beam@hirschkaefer.de>
 */
#ifndef _AUTO_COMPLETER_DEFAULT_IMPL_H
#define _AUTO_COMPLETER_DEFAULT_IMPL_H

#include <ListView.h>
#include <String.h>

#include "AutoCompleter.h"

class BDefaultPatternSelector : public BAutoCompleter::PatternSelector {
public:
        virtual void                            SelectPatternBounds(const BString& text,
                                                                        int32 caretPos, int32* start,
                                                                        int32* length);
};


class BDefaultCompletionStyle : public BAutoCompleter::CompletionStyle {
public:
                                                                BDefaultCompletionStyle(
                                                                        BAutoCompleter::EditView* editView, 
                                                                        BAutoCompleter::ChoiceModel* choiceModel,
                                                                        BAutoCompleter::ChoiceView* choiceView, 
                                                                        BAutoCompleter::PatternSelector*
                                                                                patternSelector);
        virtual                                         ~BDefaultCompletionStyle();

        virtual bool                            Select(int32 index);
        virtual bool                            SelectNext(bool wrap = false);
        virtual bool                            SelectPrevious(bool wrap = false);
        virtual bool                            IsChoiceSelected() const;
        virtual int32                           SelectedChoiceIndex() const;

        virtual void                            ApplyChoice(bool hideChoices = true);
        virtual void                            CancelChoice();

        virtual void                            EditViewStateChanged(bool updateChoices);

private:
                        BString                         fFullEnteredText;
                        int32                           fSelectedIndex;
                        int32                           fPatternStartPos;
                        int32                           fPatternLength;
                        bool                            fIgnoreEditViewStateChanges;
};


class BDefaultChoiceView : public BAutoCompleter::ChoiceView {
protected:
        class ListView : public BListView {
        public:
                                                                ListView(
                                                                        BAutoCompleter::CompletionStyle* completer);
                virtual void                    SelectionChanged();
                virtual void                    MessageReceived(BMessage* msg);
                virtual void                    MouseDown(BPoint point);
                virtual void                    AttachedToWindow();

        private:
                                BAutoCompleter::CompletionStyle* fCompleter;
        };

        class ListItem : public BListItem {
        public:
                                                                ListItem(const BAutoCompleter::Choice* choice);
                virtual void                    DrawItem(BView* owner, BRect frame,
                                                                        bool complete = false);
        private:
                                BString                 fPreText;
                                BString                 fMatchText;
                                BString                 fPostText;
        };

public:
                                                                BDefaultChoiceView();
        virtual                                         ~BDefaultChoiceView();
        
        virtual void                            SelectChoiceAt(int32 index);
        virtual void                            ShowChoices(
                                                                        BAutoCompleter::CompletionStyle* completer);
        virtual void                            HideChoices();
        virtual bool                            ChoicesAreShown();
        virtual int32                           CountVisibleChoices() const;

                                void                    SetMaxVisibleChoices(int32 choices);
                                int32                   MaxVisibleChoices() const;

private:
                        BWindow*                        fWindow;
                        ListView*                       fListView;
                        int32                           fMaxVisibleChoices;
};

#endif // _AUTO_COMPLETER_DEFAULT_IMPL_H