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<?php

/**

 * PHPExcel

 *

 * Copyright (c) 2006 - 2013 PHPExcel

 *

 * This library is free software; you can redistribute it and/or

 * modify it under the terms of the GNU Lesser General Public

 * License as published by the Free Software Foundation; either

 * version 2.1 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

 * Lesser General Public License for more details.

 *

 * You should have received a copy of the GNU Lesser General Public

 * License along with this library; if not, write to the Free Software

 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA

 *

 * @category   PHPExcel

 * @package    PHPExcel_Shared

 * @copyright  Copyright (c) 2006 - 2013 PHPExcel (http://www.codeplex.com/PHPExcel)

 * @license    http://www.gnu.org/licenses/old-licenses/lgpl-2.1.txt	LGPL

 * @version    ##VERSION##, ##DATE##

 */

/**

 * PHPExcel_Shared_Excel5

 *

 * @category   PHPExcel

 * @package    PHPExcel_Shared

 * @copyright  Copyright (c) 2006 - 2013 PHPExcel (http://www.codeplex.com/PHPExcel)

 */

class PHPExcel_Shared_Excel5

{

	/**

	 * Get the width of a column in pixels. We use the relationship y = ceil(7x) where

	 * x is the width in intrinsic Excel units (measuring width in number of normal characters)

	 * This holds for Arial 10

	 *

	 * @param PHPExcel_Worksheet $sheet The sheet

	 * @param string $col The column

	 * @return integer The width in pixels

	*/

	public static function sizeCol($sheet, $col = 'A')

	{

		// default font of the workbook

		$font = $sheet->getParent()->getDefaultStyle()->getFont();

		$columnDimensions = $sheet->getColumnDimensions();

		// first find the true column width in pixels (uncollapsed and unhidden)

		if ( isset($columnDimensions[$col]) and $columnDimensions[$col]->getWidth() != -1 ) {

			// then we have column dimension with explicit width

			$columnDimension = $columnDimensions[$col];

			$width = $columnDimension->getWidth();

			$pixelWidth = PHPExcel_Shared_Drawing::cellDimensionToPixels($width, $font);

		} else if ($sheet->getDefaultColumnDimension()->getWidth() != -1) {

			// then we have default column dimension with explicit width

			$defaultColumnDimension = $sheet->getDefaultColumnDimension();

			$width = $defaultColumnDimension->getWidth();

			$pixelWidth = PHPExcel_Shared_Drawing::cellDimensionToPixels($width, $font);

		} else {

			// we don't even have any default column dimension. Width depends on default font

			$pixelWidth = PHPExcel_Shared_Font::getDefaultColumnWidthByFont($font, true);

		}

		// now find the effective column width in pixels

		if (isset($columnDimensions[$col]) and !$columnDimensions[$col]->getVisible()) {

			$effectivePixelWidth = 0;

		} else {

			$effectivePixelWidth = $pixelWidth;

		}

		return $effectivePixelWidth;

	}

	/**

	 * Convert the height of a cell from user's units to pixels. By interpolation

	 * the relationship is: y = 4/3x. If the height hasn't been set by the user we

	 * use the default value. If the row is hidden we use a value of zero.

	 *

	 * @param PHPExcel_Worksheet $sheet The sheet

	 * @param integer $row The row index (1-based)

	 * @return integer The width in pixels

	 */

	public static function sizeRow($sheet, $row = 1)

	{

		// default font of the workbook

		$font = $sheet->getParent()->getDefaultStyle()->getFont();

		$rowDimensions = $sheet->getRowDimensions();

		// first find the true row height in pixels (uncollapsed and unhidden)

		if ( isset($rowDimensions[$row]) and $rowDimensions[$row]->getRowHeight() != -1) {

			// then we have a row dimension

			$rowDimension = $rowDimensions[$row];

			$rowHeight = $rowDimension->getRowHeight();

			$pixelRowHeight = (int) ceil(4 * $rowHeight / 3); // here we assume Arial 10

		} else if ($sheet->getDefaultRowDimension()->getRowHeight() != -1) {

			// then we have a default row dimension with explicit height

			$defaultRowDimension = $sheet->getDefaultRowDimension();

			$rowHeight = $defaultRowDimension->getRowHeight();

			$pixelRowHeight = PHPExcel_Shared_Drawing::pointsToPixels($rowHeight);

		} else {

			// we don't even have any default row dimension. Height depends on default font

			$pointRowHeight = PHPExcel_Shared_Font::getDefaultRowHeightByFont($font);

			$pixelRowHeight = PHPExcel_Shared_Font::fontSizeToPixels($pointRowHeight);

		}

		// now find the effective row height in pixels

		if ( isset($rowDimensions[$row]) and !$rowDimensions[$row]->getVisible() ) {

			$effectivePixelRowHeight = 0;

		} else {

			$effectivePixelRowHeight = $pixelRowHeight;

		}

		return $effectivePixelRowHeight;

	}

	/**

	 * Get the horizontal distance in pixels between two anchors

	 * The distanceX is found as sum of all the spanning columns widths minus correction for the two offsets

	 *

	 * @param PHPExcel_Worksheet $sheet

	 * @param string $startColumn

	 * @param integer $startOffsetX Offset within start cell measured in 1/1024 of the cell width

	 * @param string $endColumn

	 * @param integer $endOffsetX Offset within end cell measured in 1/1024 of the cell width

	 * @return integer Horizontal measured in pixels

	 */

	public static function getDistanceX(PHPExcel_Worksheet $sheet, $startColumn = 'A', $startOffsetX = 0, $endColumn = 'A', $endOffsetX = 0)

	{

		$distanceX = 0;

		// add the widths of the spanning columns

		$startColumnIndex = PHPExcel_Cell::columnIndexFromString($startColumn) - 1; // 1-based

		$endColumnIndex = PHPExcel_Cell::columnIndexFromString($endColumn) - 1; // 1-based

		for ($i = $startColumnIndex; $i <= $endColumnIndex; ++$i) {

			$distanceX += self::sizeCol($sheet, PHPExcel_Cell::stringFromColumnIndex($i));

		}

		// correct for offsetX in startcell

		$distanceX -= (int) floor(self::sizeCol($sheet, $startColumn) * $startOffsetX / 1024);

		// correct for offsetX in endcell

		$distanceX -= (int) floor(self::sizeCol($sheet, $endColumn) * (1 - $endOffsetX / 1024));

		return $distanceX;

	}

	/**

	 * Get the vertical distance in pixels between two anchors

	 * The distanceY is found as sum of all the spanning rows minus two offsets

	 *

	 * @param PHPExcel_Worksheet $sheet

	 * @param integer $startRow (1-based)

	 * @param integer $startOffsetY Offset within start cell measured in 1/256 of the cell height

	 * @param integer $endRow (1-based)

	 * @param integer $endOffsetY Offset within end cell measured in 1/256 of the cell height

	 * @return integer Vertical distance measured in pixels

	 */

	public static function getDistanceY(PHPExcel_Worksheet $sheet, $startRow = 1, $startOffsetY = 0, $endRow = 1, $endOffsetY = 0)

	{

		$distanceY = 0;

		// add the widths of the spanning rows

		for ($row = $startRow; $row <= $endRow; ++$row) {

			$distanceY += self::sizeRow($sheet, $row);

		}

		// correct for offsetX in startcell

		$distanceY -= (int) floor(self::sizeRow($sheet, $startRow) * $startOffsetY / 256);

		// correct for offsetX in endcell

		$distanceY -= (int) floor(self::sizeRow($sheet, $endRow) * (1 - $endOffsetY / 256));

		return $distanceY;

	}

	/**

	 * Convert 1-cell anchor coordinates to 2-cell anchor coordinates

	 * This function is ported from PEAR Spreadsheet_Writer_Excel with small modifications

	 *

	 * Calculate the vertices that define the position of the image as required by

	 * the OBJ record.

	 *

	 *		 +------------+------------+

	 *		 |	 A	  |	  B	 |

	 *   +-----+------------+------------+

	 *   |	 |(x1,y1)	 |			|

	 *   |  1  |(A1)._______|______	  |

	 *   |	 |	|			  |	 |

	 *   |	 |	|			  |	 |

	 *   +-----+----|	BITMAP	|-----+

	 *   |	 |	|			  |	 |

	 *   |  2  |	|______________.	 |

	 *   |	 |			|		(B2)|

	 *   |	 |			|	 (x2,y2)|

	 *   +---- +------------+------------+

	 *

	 * Example of a bitmap that covers some of the area from cell A1 to cell B2.

	 *

	 * Based on the width and height of the bitmap we need to calculate 8 vars:

	 *	 $col_start, $row_start, $col_end, $row_end, $x1, $y1, $x2, $y2.

	 * The width and height of the cells are also variable and have to be taken into

	 * account.

	 * The values of $col_start and $row_start are passed in from the calling

	 * function. The values of $col_end and $row_end are calculated by subtracting

	 * the width and height of the bitmap from the width and height of the

	 * underlying cells.

	 * The vertices are expressed as a percentage of the underlying cell width as

	 * follows (rhs values are in pixels):

	 *

	 *	   x1 = X / W *1024

	 *	   y1 = Y / H *256

	 *	   x2 = (X-1) / W *1024

	 *	   y2 = (Y-1) / H *256

	 *

	 *	   Where:  X is distance from the left side of the underlying cell

	 *			   Y is distance from the top of the underlying cell

	 *			   W is the width of the cell

	 *			   H is the height of the cell

	 *

	 * @param PHPExcel_Worksheet $sheet

	 * @param string $coordinates E.g. 'A1'

	 * @param integer $offsetX Horizontal offset in pixels

	 * @param integer $offsetY Vertical offset in pixels

	 * @param integer $width Width in pixels

	 * @param integer $height Height in pixels

	 * @return array

	 */

	public static function oneAnchor2twoAnchor($sheet, $coordinates, $offsetX, $offsetY, $width, $height)

	{

		list($column, $row) = PHPExcel_Cell::coordinateFromString($coordinates);

		$col_start = PHPExcel_Cell::columnIndexFromString($column) - 1;

		$row_start = $row - 1;

		$x1 = $offsetX;

		$y1 = $offsetY;

		// Initialise end cell to the same as the start cell

		$col_end	= $col_start;  // Col containing lower right corner of object

		$row_end	= $row_start;  // Row containing bottom right corner of object

		// Zero the specified offset if greater than the cell dimensions

		if ($x1 >= self::sizeCol($sheet, PHPExcel_Cell::stringFromColumnIndex($col_start))) {

			$x1 = 0;

		}

		if ($y1 >= self::sizeRow($sheet, $row_start + 1)) {

			$y1 = 0;

		}

		$width	  = $width  + $x1 -1;

		$height	 = $height + $y1 -1;

		// Subtract the underlying cell widths to find the end cell of the image

		while ($width >= self::sizeCol($sheet, PHPExcel_Cell::stringFromColumnIndex($col_end))) {

			$width -= self::sizeCol($sheet, PHPExcel_Cell::stringFromColumnIndex($col_end));

			++$col_end;

		}

		// Subtract the underlying cell heights to find the end cell of the image

		while ($height >= self::sizeRow($sheet, $row_end + 1)) {

			$height -= self::sizeRow($sheet, $row_end + 1);

			++$row_end;

		}

		// Bitmap isn't allowed to start or finish in a hidden cell, i.e. a cell

		// with zero height or width.

		if (self::sizeCol($sheet, PHPExcel_Cell::stringFromColumnIndex($col_start)) == 0) {

			return;

		}

		if (self::sizeCol($sheet, PHPExcel_Cell::stringFromColumnIndex($col_end))   == 0) {

			return;

		}

		if (self::sizeRow($sheet, $row_start + 1) == 0) {

			return;

		}

		if (self::sizeRow($sheet, $row_end + 1)   == 0) {

			return;

		}

		// Convert the pixel values to the percentage value expected by Excel

		$x1 = $x1	 / self::sizeCol($sheet, PHPExcel_Cell::stringFromColumnIndex($col_start))   * 1024;

		$y1 = $y1	 / self::sizeRow($sheet, $row_start + 1)   *  256;

		$x2 = ($width + 1)  / self::sizeCol($sheet, PHPExcel_Cell::stringFromColumnIndex($col_end))	 * 1024; // Distance to right side of object

		$y2 = ($height + 1) / self::sizeRow($sheet, $row_end + 1)	 *  256; // Distance to bottom of object

		$startCoordinates = PHPExcel_Cell::stringFromColumnIndex($col_start) . ($row_start + 1);

		$endCoordinates = PHPExcel_Cell::stringFromColumnIndex($col_end) . ($row_end + 1);

		$twoAnchor = array(

			'startCoordinates' => $startCoordinates,

			'startOffsetX' => $x1,

			'startOffsetY' => $y1,

			'endCoordinates' => $endCoordinates,

			'endOffsetX' => $x2,

			'endOffsetY' => $y2,

		);

		return  $twoAnchor;

	}

}