/*
 * -- $Id$ --
 * Copyright (C) 2001 The Apache Software Foundation. All rights reserved.
 * For details on use and redistribution please refer to the
 * LICENSE file included with these sources.
 */

package org.apache.fop.fo.flow;

// FOP
import org.apache.fop.fo.*;
import org.apache.fop.fo.properties.*;
import org.apache.fop.layout.*;
import org.apache.fop.apps.FOPException;
import org.apache.fop.datatypes.*;

import org.xml.sax.Attributes;

public class TableCell extends FObj {

    // int spaceBefore;
    // int spaceAfter;
    ColorType backgroundColor;

    int numColumnsSpanned;
    int numRowsSpanned;
    int iColNumber = -1;    // uninitialized

    /**
     * Offset of content rectangle in inline-progression-direction,
     * relative to table.
     */
    protected int startOffset;

    /**
     * Dimension of allocation rectangle in inline-progression-direction,
     * determined by the width of the column(s) occupied by the cell
     */
    protected int width;

    /**
     * Offset of content rectangle, in block-progression-direction,
     * relative to the row.
     */
    protected int beforeOffset = 0;

    /**
     * Offset of content rectangle, in inline-progression-direction,
     * relative to the column start edge.
     */
    protected int startAdjust = 0;

    /**
     * Adjust to theoretical column width to obtain content width
     * relative to the column start edge.
     */
    protected int widthAdjust = 0;

    /* For collapsed border style */
    protected int borderHeight = 0;

    /**
     * Minimum ontent height of cell.
     */
    protected int minCellHeight = 0;

    protected int height = 0;
    protected int top;      // Ypos of cell ???
    protected int verticalAlign;
    protected boolean bRelativeAlign = false;

    // boolean setup = false;
    boolean bSepBorders = true;
    
    /**
     * Set to true if all content completely laid out.
     */
    boolean bDone=false;

    /**
     * Border separation value in the block-progression dimension.
     * Used in calculating cells height.
     */
    int m_borderSeparation = 0;

    public TableCell(FONode parent) {
        super(parent);
    }

    public void handleAttrs(Attributes attlist) throws FOPException {
        super.handleAttrs(attlist);
        doSetup();    // init some basic property values
    }

    // Set position relative to table (set by body?)
    public void setStartOffset(int offset) {
        startOffset = offset;
    }

    // Initially same as the column width containg this cell or the
    // sum of the spanned columns if numColumnsSpanned > 1
    public void setWidth(int width) {
        this.width = width;
    }

    public int getColumnNumber() {
        return iColNumber;
    }

    public int getNumColumnsSpanned() {
        return numColumnsSpanned;
    }

    public int getNumRowsSpanned() {
        return numRowsSpanned;
    }

    public void doSetup()    // throws FOPException
     {
        // Common Accessibility Properties
        AccessibilityProps mAccProps = propMgr.getAccessibilityProps();

        // Common Aural Properties
        AuralProps mAurProps = propMgr.getAuralProps();

        // Common Border, Padding, and Background Properties
        BorderAndPadding bap = propMgr.getBorderAndPadding();
        BackgroundProps bProps = propMgr.getBackgroundProps();

        // Common Relative Position Properties
        RelativePositionProps mRelProps = propMgr.getRelativePositionProps();

        // this.properties.get("border-after-precedence");
        // this.properties.get("border-before-precendence");
        // this.properties.get("border-end-precendence");
        // this.properties.get("border-start-precendence");
        // this.properties.get("block-progression-dimension");
        // this.properties.get("column-number");
        // this.properties.get("display-align");
        // this.properties.get("relative-align");
        // this.properties.get("empty-cells");
        // this.properties.get("ends-row");
        // this.properties.get("height");
        setupID();
        // this.properties.get("number-columns-spanned");
        // this.properties.get("number-rows-spanned");
        // this.properties.get("starts-row");
        // this.properties.get("width");

        this.iColNumber =
            properties.get("column-number").getNumber().intValue();
        if (iColNumber < 0) {
            iColNumber = 0;
        }
        this.numColumnsSpanned =
            this.properties.get("number-columns-spanned").getNumber().intValue();
        if (numColumnsSpanned < 1) {
            numColumnsSpanned = 1;
        }
        this.numRowsSpanned =
            this.properties.get("number-rows-spanned").getNumber().intValue();
        if (numRowsSpanned < 1) {
            numRowsSpanned = 1;
        }

        this.backgroundColor =
            this.properties.get("background-color").getColorType();

        bSepBorders = (this.properties.get("border-collapse").getEnum()
                       == BorderCollapse.SEPARATE);

        calcBorders(propMgr.getBorderAndPadding());

        // Vertical cell alignment
        verticalAlign = this.properties.get("display-align").getEnum();
        if (verticalAlign == DisplayAlign.AUTO) {
            // Depends on all cells starting in row
            bRelativeAlign = true;
            verticalAlign = this.properties.get("relative-align").getEnum();
        } else
            bRelativeAlign = false;    // Align on a per-cell basis

        this.minCellHeight =
            this.properties.get("height").getLength().mvalue();
    }

    /**
     * Calculate cell border and padding, including offset of content
     * rectangle from the theoretical grid position.
     */
    private void calcBorders(BorderAndPadding bp) {
        if (this.bSepBorders) {
            /*
             * Easy case.
             * Cell border is the property specified directly on cell.
             * Offset content rect by half the border-separation value,
             * in addition to the border and padding values. Note:
             * border-separate should only be specified on the table object,
             * but it inherits.
             */
            int iSep =
                properties.get("border-separation.inline-progression-direction").getLength().mvalue();
            this.startAdjust = iSep / 2 + bp.getBorderLeftWidth(false)
                               + bp.getPaddingLeft(false);
            /*
             * int contentOffset = iSep + bp.getBorderStartWidth(false) +
             * bp.getPaddingStart(false);
             */
            this.widthAdjust = startAdjust + iSep - iSep / 2
                               + bp.getBorderRightWidth(false)
                               + bp.getPaddingRight(false);
            // bp.getBorderEndWidth(false) + bp.getPaddingEnd(false);
            // Offset of content rectangle in the block-progression direction
            m_borderSeparation =
                properties.get("border-separation.block-progression-direction").getLength().mvalue();
            this.beforeOffset = m_borderSeparation / 2
                                + bp.getBorderTopWidth(false)
                                + bp.getPaddingTop(false);
            // bp.getBorderBeforeWidth(false) +	bp.getPaddingBefore(false);

        } else {
            // System.err.println("Collapse borders");
            /*
             * Hard case.
             * Cell border is combination of other cell borders, or table
             * border for edge cells. Also seems to border values specified
             * on row and column FO in the table (if I read CR correclty.)
             */

            // Set up before and after borders, taking into account row
            // and table border properties.
            // ??? What about table-body, header,footer

            /*
             * We can't calculate before and after because we aren't sure
             * whether this row will be the first or last in its area, due
             * to redoing break decisions (at least in the "new" architecture.)
             * So in the general case, we will calculate two possible values:
             * the first/last one and the "middle" one.
             * Example: border-before
             * 1. If the cell is in the first row in the first table body, it
             * will combine with the last row of the header, or with the
             * top (before) table border if there is no header.
             * 2. Otherwise there are two cases:
             * a. the row is first in its (non-first) Area.
             * The border can combine with either:
             * i.  the last row of table-header and its cells, or
             * ii. the table before border (no table-header or it is
             * omitted on non-first Areas).
             * b. the row isn't first in its Area.
             * The border combines with the border of the previous
             * row and the cells which end in that row.
             */

            /*
             * if-first
             * Calculate the effective border of the cell before-border,
             * it's parent row before-border, the last header row after-border,
             * the after border of the cell(s) which end in the last header
             * row.
             */
            /*
             * if-not-first
             * Calculate the effective border of the cell before-border,
             * it's parent row before-border, the previous row after-border,
             * the after border of the cell(s) which end in the previous
             * row.
             */


            /* ivan demakov */
            int borderStart = bp.getBorderLeftWidth(false);
            int borderEnd = bp.getBorderRightWidth(false);
            int borderBefore = bp.getBorderTopWidth(false);
            int borderAfter = bp.getBorderBottomWidth(false);

            this.startAdjust = borderStart / 2 + bp.getPaddingLeft(false);

            this.widthAdjust = startAdjust + borderEnd / 2
                               + bp.getPaddingRight(false);
            this.beforeOffset = borderBefore / 2 + bp.getPaddingTop(false);
            // Half border height to fix overestimate of area size!
            this.borderHeight = (borderBefore + borderAfter) / 2;
        }
    }
    

}