// This Source Code is in the Public Domain per: http://unlicense.org
package org.litesoft.GWT.client.taskbar;

import org.litesoft.GWT.client.*;
import org.litesoft.GWT.client.iconservice.*;
import org.litesoft.GWT.client.widgets.*;
import org.litesoft.GWT.client.widgets.nonpublic.*;

import com.google.gwt.user.client.*;
import com.google.gwt.user.client.ui.*;

public class FavoritesContextMenu extends PopupPanel {
    private boolean isHorizontal;
    Grid mGrid;
    private static final int ADDITIONAL_OFFSET = 22; // 16
    private static final int PADDING = 5;

    public FavoritesContextMenu( boolean autoHide, final TaskbarHelper pHelper,
                                 final TaskbarItem pTaskbarItem ) {
        super( autoHide );

        final boolean isFirstItem = pHelper.isFirstFavoriteItem( pTaskbarItem );
        final boolean isLastItem = pHelper.isLastFavoriteItem( pTaskbarItem );

        isHorizontal = pHelper.isPositionHorizontal();

        if ( isHorizontal ) {
            mGrid = new Grid( 1, 3 );

            if ( isFirstItem ) {
                mGrid.setWidget( 0, 0, new OneCellTable( new Image( "common/images/windowbar/favcontext/arrow_left-Disabled.gif" ) ) );
            } else {
                mGrid.setWidget( 0, 0, new OneCellTable( new Image( "common/images/windowbar/favcontext/arrow_left.gif" ) ) );
            }

            if ( isLastItem ) {
                mGrid.setWidget( 0, 2, new OneCellTable( new Image( "common/images/windowbar/favcontext/arrow_right-Disabled.gif" ) ) );
            } else {
                mGrid.setWidget( 0, 2, new OneCellTable( new Image( "common/images/windowbar/favcontext/arrow_right.gif" ) ) );
            }

            mGrid.setWidget( 0, 1, new OneCellTable( new Image( "images/remove_red.gif" ) ) );

            mGrid.addTableListener( new TableListener() {
                public void onCellClicked( SourcesTableEvents sender, int row, int cell ) {
                    FavoritesManager favoritesManager = FavoritesManager.INSTANCE;
                    switch ( cell ) {
                        case 0:
                            if ( !isFirstItem ) {
                                favoritesManager.moveFavoriteUp( pTaskbarItem );
                            }
                            break;
                        case 1:
                            favoritesManager.removeFavorite( pTaskbarItem );
                            break;
                        case 2:
                            if ( !isLastItem ) {
                                favoritesManager.moveFavoriteDown( pTaskbarItem );
                            }
                            break;
                        default:
                            break;
                    }
                    hide();
                    pHelper.hidePopup();
                }
            } );
        } else {
            mGrid = new Grid( 3, 1 );

            if ( isFirstItem ) {
                mGrid.setWidget( 0, 0, new OneCellTable( new Image( "common/images/windowbar/favcontext/arrow_up-Disabled.gif" ) ) );
            } else {
                mGrid.setWidget( 0, 0, new OneCellTable( new Image( "common/images/windowbar/favcontext/arrow_up.gif" ) ) );
            }

            if ( isLastItem ) {
                mGrid.setWidget( 2, 0, new OneCellTable( new Image( "common/images/windowbar/favcontext/arrow_down-Disabled.gif" ) ) );
            } else {
                mGrid.setWidget( 2, 0, new OneCellTable( new Image( "common/images/windowbar/favcontext/arrow_down.gif" ) ) );
            }

            mGrid.setWidget( 1, 0, new OneCellTable( new Image( "images/remove_red.gif" ) ) );

            mGrid.addTableListener( new TableListener() {
                public void onCellClicked( SourcesTableEvents sender, int row, int cell ) {
                    FavoritesManager favoritesManager = FavoritesManager.INSTANCE;
                    switch ( row ) {
                        case 0:
                            if ( !isFirstItem ) {
                                favoritesManager.moveFavoriteUp( pTaskbarItem );
                            }
                            break;
                        case 1:
                            favoritesManager.removeFavorite( pTaskbarItem );
                            break;
                        case 2:
                            if ( !isLastItem ) {
                                favoritesManager.moveFavoriteDown( pTaskbarItem );
                            }
                            break;
                        default:
                            break;
                    }
                    hide();
                    pHelper.hidePopup();
                }
            } );
        }
        add( mGrid );
    }

    public void showContextMenu( final int pSenderAbsoluteLeft, final int pSenderAbsoluteTop ) {
        setPopupPositionAndShow( new PopupPanel.PositionCallback() {
            public void setPosition( int offsetWidth, int offsetHeight ) {
                int popupPositionX = 0;
                int popupPositionY = 0;

                int clientWidth = Window.getClientWidth();
                int clientHeight = Window.getClientHeight();

                if ( isHorizontal ) {
                    if ( (pSenderAbsoluteLeft + offsetWidth) > clientWidth ) {
                        popupPositionX = pSenderAbsoluteLeft - offsetWidth;
                    } else {
                        popupPositionX = pSenderAbsoluteLeft;
                    }

                    if ( (pSenderAbsoluteTop + offsetHeight + PADDING) > clientHeight ) {
                        popupPositionY = pSenderAbsoluteTop - offsetHeight;
                    } else {
                        popupPositionY = pSenderAbsoluteTop + ADDITIONAL_OFFSET;
                    }
                } else {
                    if ( (pSenderAbsoluteLeft + offsetWidth + PADDING) > clientWidth ) {
                        popupPositionX = pSenderAbsoluteLeft - offsetWidth;
                    } else {
                        popupPositionX = pSenderAbsoluteLeft + ADDITIONAL_OFFSET;
                    }

                    if ( (pSenderAbsoluteTop + offsetHeight) > clientHeight ) {
                        popupPositionY = pSenderAbsoluteTop - offsetHeight;
                    } else {
                        popupPositionY = pSenderAbsoluteTop;
                    }
                }

                setPopupPosition( popupPositionX, popupPositionY );
            }
        } );
    }

    private class OneCellTable extends TightGrid {
        public OneCellTable( Image pImage ) {
            super( 1, 1 );
            setWidget( 0, 0, pImage );
            DOM.setElementAttribute( getElement(), "width", "22" );
            DOM.setElementAttribute( getElement(), "height", "22" );
            addStyleName( "OneCellTable" );

            setOnBrowserEventListener( Event.MOUSEEVENTS, new OnBrowserEventListener() {
                public boolean onBrowserEvent( Event event ) {
                    switch ( DOM.eventGetType( event ) ) {
                        case Event.ONMOUSEUP:
                            UtilsGwt.eventPreventDefaultAndCancelBubble( event );

                            cleanStyles();
                            addStyleName( "OneCellTable-MouseUp" );
                            break;

                        case Event.ONMOUSEOVER:
                            UtilsGwt.eventPreventDefaultAndCancelBubble( event );

                            cleanStyles();
                            addStyleName( "OneCellTable-MouseOver" );
                            break;

                        case Event.ONMOUSEOUT:
                            UtilsGwt.eventPreventDefaultAndCancelBubble( event );

                            cleanStyles();
                            addStyleName( "OneCellTable-MouseOut" );
                            break;

                        case Event.ONMOUSEDOWN:
                            UtilsGwt.eventPreventDefaultAndCancelBubble( event );

                            cleanStyles();
                            addStyleName( "OneCellTable-MouseDown" );
                            break;

                        case Event.ONMOUSEMOVE:
                        default:
                            break;
                    }
                    return false;
                }
            } );
        }

        private void cleanStyles() {
            removeStyleName( "OneCellTable-MouseUp" );
            removeStyleName( "OneCellTable-MouseOver" );
            removeStyleName( "OneCellTable-MouseOut" );
            removeStyleName( "OneCellTable-MouseDown" );
        }
    }
}