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<?php
namespace PhpOffice\PhpSpreadsheet\Cell;
use PhpOffice\PhpSpreadsheet\Exception;
use PhpOffice\PhpSpreadsheet\Worksheet\Worksheet;
/**
* Helper class to manipulate cell coordinates.
*
* Columns indexes and rows are always based on 1, **not** on 0. This match the behavior
* that Excel users are used to, and also match the Excel functions `COLUMN()` and `ROW()`.
*/
abstract class Coordinate
{
/**
* Default range variable constant.
*
* @var string
*/
const DEFAULT_RANGE = 'A1:A1';
/**
* Coordinate from string.
*
* @param string $pCoordinateString eg: 'A1'
*
* @throws Exception
*
* @return string[] Array containing column and row (indexes 0 and 1)
*/
public static function coordinateFromString($pCoordinateString)
{
if (preg_match('/^([$]?[A-Z]{1,3})([$]?\\d{1,7})$/', $pCoordinateString, $matches)) {
return [$matches[1], $matches[2]];
} elseif (self::coordinateIsRange($pCoordinateString)) {
throw new Exception('Cell coordinate string can not be a range of cells');
} elseif ($pCoordinateString == '') {
throw new Exception('Cell coordinate can not be zero-length string');
}
throw new Exception('Invalid cell coordinate ' . $pCoordinateString);
}
/**
* Checks if a coordinate represents a range of cells.
*
* @param string $coord eg: 'A1' or 'A1:A2' or 'A1:A2,C1:C2'
*
* @return bool Whether the coordinate represents a range of cells
*/
public static function coordinateIsRange($coord)
{
return (strpos($coord, ':') !== false) || (strpos($coord, ',') !== false);
}
/**
* Make string row, column or cell coordinate absolute.
*
* @param string $pCoordinateString e.g. 'A' or '1' or 'A1'
* Note that this value can be a row or column reference as well as a cell reference
*
* @throws Exception
*
* @return string Absolute coordinate e.g. '$A' or '$1' or '$A$1'
*/
public static function absoluteReference($pCoordinateString)
{
if (self::coordinateIsRange($pCoordinateString)) {
throw new Exception('Cell coordinate string can not be a range of cells');
}
// Split out any worksheet name from the reference
list($worksheet, $pCoordinateString) = Worksheet::extractSheetTitle($pCoordinateString, true);
if ($worksheet > '') {
$worksheet .= '!';
}
// Create absolute coordinate
if (ctype_digit($pCoordinateString)) {
return $worksheet . '$' . $pCoordinateString;
} elseif (ctype_alpha($pCoordinateString)) {
return $worksheet . '$' . strtoupper($pCoordinateString);
}
return $worksheet . self::absoluteCoordinate($pCoordinateString);
}
/**
* Make string coordinate absolute.
*
* @param string $pCoordinateString e.g. 'A1'
*
* @throws Exception
*
* @return string Absolute coordinate e.g. '$A$1'
*/
public static function absoluteCoordinate($pCoordinateString)
{
if (self::coordinateIsRange($pCoordinateString)) {
throw new Exception('Cell coordinate string can not be a range of cells');
}
// Split out any worksheet name from the coordinate
list($worksheet, $pCoordinateString) = Worksheet::extractSheetTitle($pCoordinateString, true);
if ($worksheet > '') {
$worksheet .= '!';
}
// Create absolute coordinate
list($column, $row) = self::coordinateFromString($pCoordinateString);
$column = ltrim($column, '$');
$row = ltrim($row, '$');
return $worksheet . '$' . $column . '$' . $row;
}
/**
* Split range into coordinate strings.
*
* @param string $pRange e.g. 'B4:D9' or 'B4:D9,H2:O11' or 'B4'
*
* @return array Array containing one or more arrays containing one or two coordinate strings
* e.g. ['B4','D9'] or [['B4','D9'], ['H2','O11']]
* or ['B4']
*/
public static function splitRange($pRange)
{
// Ensure $pRange is a valid range
if (empty($pRange)) {
$pRange = self::DEFAULT_RANGE;
}
$exploded = explode(',', $pRange);
$counter = count($exploded);
for ($i = 0; $i < $counter; ++$i) {
$exploded[$i] = explode(':', $exploded[$i]);
}
return $exploded;
}
/**
* Build range from coordinate strings.
*
* @param array $pRange Array containg one or more arrays containing one or two coordinate strings
*
* @throws Exception
*
* @return string String representation of $pRange
*/
public static function buildRange(array $pRange)
{
// Verify range
if (empty($pRange) || !is_array($pRange[0])) {
throw new Exception('Range does not contain any information');
}
// Build range
$imploded = [];
$counter = count($pRange);
for ($i = 0; $i < $counter; ++$i) {
$pRange[$i] = implode(':', $pRange[$i]);
}
$imploded = implode(',', $pRange);
return $imploded;
}
/**
* Calculate range boundaries.
*
* @param string $pRange Cell range (e.g. A1:A1)
*
* @return array Range coordinates [Start Cell, End Cell]
* where Start Cell and End Cell are arrays (Column Number, Row Number)
*/
public static function rangeBoundaries($pRange)
{
// Ensure $pRange is a valid range
if (empty($pRange)) {
$pRange = self::DEFAULT_RANGE;
}
// Uppercase coordinate
$pRange = strtoupper($pRange);
// Extract range
if (strpos($pRange, ':') === false) {
$rangeA = $rangeB = $pRange;
} else {
list($rangeA, $rangeB) = explode(':', $pRange);
}
// Calculate range outer borders
$rangeStart = self::coordinateFromString($rangeA);
$rangeEnd = self::coordinateFromString($rangeB);
// Translate column into index
$rangeStart[0] = self::columnIndexFromString($rangeStart[0]);
$rangeEnd[0] = self::columnIndexFromString($rangeEnd[0]);
return [$rangeStart, $rangeEnd];
}
/**
* Calculate range dimension.
*
* @param string $pRange Cell range (e.g. A1:A1)
*
* @return array Range dimension (width, height)
*/
public static function rangeDimension($pRange)
{
// Calculate range outer borders
list($rangeStart, $rangeEnd) = self::rangeBoundaries($pRange);
return [($rangeEnd[0] - $rangeStart[0] + 1), ($rangeEnd[1] - $rangeStart[1] + 1)];
}
/**
* Calculate range boundaries.
*
* @param string $pRange Cell range (e.g. A1:A1)
*
* @return array Range coordinates [Start Cell, End Cell]
* where Start Cell and End Cell are arrays [Column ID, Row Number]
*/
public static function getRangeBoundaries($pRange)
{
// Ensure $pRange is a valid range
if (empty($pRange)) {
$pRange = self::DEFAULT_RANGE;
}
// Uppercase coordinate
$pRange = strtoupper($pRange);
// Extract range
if (strpos($pRange, ':') === false) {
$rangeA = $rangeB = $pRange;
} else {
list($rangeA, $rangeB) = explode(':', $pRange);
}
return [self::coordinateFromString($rangeA), self::coordinateFromString($rangeB)];
}
/**
* Column index from string.
*
* @param string $pString eg 'A'
*
* @return int Column index (A = 1)
*/
public static function columnIndexFromString($pString)
{
// Using a lookup cache adds a slight memory overhead, but boosts speed
// caching using a static within the method is faster than a class static,
// though it's additional memory overhead
static $indexCache = [];
if (isset($indexCache[$pString])) {
return $indexCache[$pString];
}
// It's surprising how costly the strtoupper() and ord() calls actually are, so we use a lookup array rather than use ord()
// and make it case insensitive to get rid of the strtoupper() as well. Because it's a static, there's no significant
// memory overhead either
static $columnLookup = [
'A' => 1, 'B' => 2, 'C' => 3, 'D' => 4, 'E' => 5, 'F' => 6, 'G' => 7, 'H' => 8, 'I' => 9, 'J' => 10, 'K' => 11, 'L' => 12, 'M' => 13,
'N' => 14, 'O' => 15, 'P' => 16, 'Q' => 17, 'R' => 18, 'S' => 19, 'T' => 20, 'U' => 21, 'V' => 22, 'W' => 23, 'X' => 24, 'Y' => 25, 'Z' => 26,
'a' => 1, 'b' => 2, 'c' => 3, 'd' => 4, 'e' => 5, 'f' => 6, 'g' => 7, 'h' => 8, 'i' => 9, 'j' => 10, 'k' => 11, 'l' => 12, 'm' => 13,
'n' => 14, 'o' => 15, 'p' => 16, 'q' => 17, 'r' => 18, 's' => 19, 't' => 20, 'u' => 21, 'v' => 22, 'w' => 23, 'x' => 24, 'y' => 25, 'z' => 26,
];
// We also use the language construct isset() rather than the more costly strlen() function to match the length of $pString
// for improved performance
if (isset($pString[0])) {
if (!isset($pString[1])) {
$indexCache[$pString] = $columnLookup[$pString];
return $indexCache[$pString];
} elseif (!isset($pString[2])) {
$indexCache[$pString] = $columnLookup[$pString[0]] * 26 + $columnLookup[$pString[1]];
return $indexCache[$pString];
} elseif (!isset($pString[3])) {
$indexCache[$pString] = $columnLookup[$pString[0]] * 676 + $columnLookup[$pString[1]] * 26 + $columnLookup[$pString[2]];
return $indexCache[$pString];
}
}
throw new Exception('Column string index can not be ' . ((isset($pString[0])) ? 'longer than 3 characters' : 'empty'));
}
/**
* String from column index.
*
* @param int $columnIndex Column index (A = 1)
*
* @return string
*/
public static function stringFromColumnIndex($columnIndex)
{
static $indexCache = [];
if (!isset($indexCache[$columnIndex])) {
$indexValue = $columnIndex;
$base26 = null;
do {
$characterValue = ($indexValue % 26) ?: 26;
$indexValue = ($indexValue - $characterValue) / 26;
$base26 = chr($characterValue + 64) . ($base26 ?: '');
} while ($indexValue > 0);
$indexCache[$columnIndex] = $base26;
}
return $indexCache[$columnIndex];
}
/**
* Extract all cell references in range, which may be comprised of multiple cell ranges.
*
* @param string $pRange Range (e.g. A1 or A1:C10 or A1:E10 A20:E25)
*
* @return array Array containing single cell references
*/
public static function extractAllCellReferencesInRange($pRange)
{
$returnValue = [];
// Explode spaces
$cellBlocks = self::getCellBlocksFromRangeString($pRange);
foreach ($cellBlocks as $cellBlock) {
$returnValue = array_merge($returnValue, self::getReferencesForCellBlock($cellBlock));
}
// Sort the result by column and row
$sortKeys = [];
foreach (array_unique($returnValue) as $coord) {
$column = '';
$row = 0;
sscanf($coord, '%[A-Z]%d', $column, $row);
$sortKeys[sprintf('%3s%09d', $column, $row)] = $coord;
}
ksort($sortKeys);
// Return value
return array_values($sortKeys);
}
/**
* Get all cell references for an individual cell block.
*
* @param string $cellBlock A cell range e.g. A4:B5
*
* @return array All individual cells in that range
*/
private static function getReferencesForCellBlock($cellBlock)
{
$returnValue = [];
// Single cell?
if (!self::coordinateIsRange($cellBlock)) {
return (array) $cellBlock;
}
// Range...
$ranges = self::splitRange($cellBlock);
foreach ($ranges as $range) {
// Single cell?
if (!isset($range[1])) {
$returnValue[] = $range[0];
continue;
}
// Range...
list($rangeStart, $rangeEnd) = $range;
list($startColumn, $startRow) = self::coordinateFromString($rangeStart);
list($endColumn, $endRow) = self::coordinateFromString($rangeEnd);
$startColumnIndex = self::columnIndexFromString($startColumn);
$endColumnIndex = self::columnIndexFromString($endColumn);
++$endColumnIndex;
// Current data
$currentColumnIndex = $startColumnIndex;
$currentRow = $startRow;
self::validateRange($cellBlock, $startColumnIndex, $endColumnIndex, $currentRow, $endRow);
// Loop cells
while ($currentColumnIndex < $endColumnIndex) {
while ($currentRow <= $endRow) {
$returnValue[] = self::stringFromColumnIndex($currentColumnIndex) . $currentRow;
++$currentRow;
}
++$currentColumnIndex;
$currentRow = $startRow;
}
}
return $returnValue;
}
/**
* Convert an associative array of single cell coordinates to values to an associative array
* of cell ranges to values. Only adjacent cell coordinates with the same
* value will be merged. If the value is an object, it must implement the method getHashCode().
*
* For example, this function converts:
*
* [ 'A1' => 'x', 'A2' => 'x', 'A3' => 'x', 'A4' => 'y' ]
*
* to:
*
* [ 'A1:A3' => 'x', 'A4' => 'y' ]
*
* @param array $pCoordCollection associative array mapping coordinates to values
*
* @return array associative array mapping coordinate ranges to valuea
*/
public static function mergeRangesInCollection(array $pCoordCollection)
{
$hashedValues = [];
$mergedCoordCollection = [];
foreach ($pCoordCollection as $coord => $value) {
if (self::coordinateIsRange($coord)) {
$mergedCoordCollection[$coord] = $value;
continue;
}
list($column, $row) = self::coordinateFromString($coord);
$row = (int) (ltrim($row, '$'));
$hashCode = $column . '-' . (is_object($value) ? $value->getHashCode() : $value);
if (!isset($hashedValues[$hashCode])) {
$hashedValues[$hashCode] = (object) [
'value' => $value,
'col' => $column,
'rows' => [$row],
];
} else {
$hashedValues[$hashCode]->rows[] = $row;
}
}
ksort($hashedValues);
foreach ($hashedValues as $hashedValue) {
sort($hashedValue->rows);
$rowStart = null;
$rowEnd = null;
$ranges = [];
foreach ($hashedValue->rows as $row) {
if ($rowStart === null) {
$rowStart = $row;
$rowEnd = $row;
} elseif ($rowEnd === $row - 1) {
$rowEnd = $row;
} else {
if ($rowStart == $rowEnd) {
$ranges[] = $hashedValue->col . $rowStart;
} else {
$ranges[] = $hashedValue->col . $rowStart . ':' . $hashedValue->col . $rowEnd;
}
$rowStart = $row;
$rowEnd = $row;
}
}
if ($rowStart !== null) {
if ($rowStart == $rowEnd) {
$ranges[] = $hashedValue->col . $rowStart;
} else {
$ranges[] = $hashedValue->col . $rowStart . ':' . $hashedValue->col . $rowEnd;
}
}
foreach ($ranges as $range) {
$mergedCoordCollection[$range] = $hashedValue->value;
}
}
return $mergedCoordCollection;
}
/**
* Get the individual cell blocks from a range string, splitting by space and removing any $ characters.
*
* @param string $pRange
*
* @return string[]
*/
private static function getCellBlocksFromRangeString($pRange)
{
return explode(' ', str_replace('$', '', strtoupper($pRange)));
}
/**
* Check that the given range is valid, i.e. that the start column and row are not greater than the end column and
* row.
*
* @param string $cellBlock The original range, for displaying a meaningful error message
* @param int $startColumnIndex
* @param int $endColumnIndex
* @param int $currentRow
* @param int $endRow
*/
private static function validateRange($cellBlock, $startColumnIndex, $endColumnIndex, $currentRow, $endRow)
{
if ($startColumnIndex >= $endColumnIndex || $currentRow > $endRow) {
throw new Exception('Invalid range: "' . $cellBlock . '"');
}
}
}