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<?php
/**
 * PHPExcel
 *
 * Copyright (c) 2006 - 2014 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 - 2014 PHPExcel (http://www.codeplex.com/PHPExcel)
 * @license    http://www.gnu.org/licenses/old-licenses/lgpl-2.1.txt	LGPL
 * @version    1.8.0, 2014-03-02
 */

/**
 * PHPExcel_Shared_Excel5
 *
 * @category   PHPExcel
 * @package    PHPExcel_Shared
 * @copyright  Copyright (c) 2006 - 2014 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;
	}

}

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