60 lines
1.9 KiB
PHP
60 lines
1.9 KiB
PHP
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<?php
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namespace nur\sery\ext\spreadsheet;
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use PhpOffice\PhpSpreadsheet\Cell\Coordinate;
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use PhpOffice\PhpSpreadsheet\Worksheet\Worksheet;
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class wsutils {
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static function get_highest_coords(Worksheet $ws): array {
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$highestRow = $ws->getHighestRow();
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$highestColumnA = $ws->getHighestColumn();
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$highestCol = Coordinate::columnIndexFromString($highestColumnA);
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return [$highestRow, $highestCol];
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}
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/**
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* @var int nombre de colonnes/lignes au bout desquels on arrête de chercher
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* si on n'a trouvé que des cellules vides.
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*
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* c'est nécessaire à cause de certains fichiers provenant d'Excel que j'ai
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* reçus qui ont jusqu'à 10000 colonne vides et/ou 1048576 lignes vides. un
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* algorithme "bête" perd énormément de temps à chercher dans le vide, donnant
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* l'impression que le processus a planté.
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*/
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const MAX_EMPTY_THRESHOLD = 150;
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static function compute_max_coords(Worksheet $ws): array {
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[$highestRow, $highestCol] = self::get_highest_coords($ws);
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$maxRow = 1;
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$maxCol = 1;
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$maxEmptyRows = self::MAX_EMPTY_THRESHOLD;
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for ($row = 1; $row <= $highestRow; $row++) {
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$emptyRow = true;
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$maxEmptyCols = self::MAX_EMPTY_THRESHOLD;
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for ($col = 1; $col <= $highestCol; $col++) {
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$value = null;
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if ($ws->cellExists([$col, $row])) {
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$value = $ws->getCell([$col, $row])->getValue();
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}
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if ($value === null) {
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$maxEmptyCols--;
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if ($maxEmptyCols == 0) break;
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} else {
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$maxEmptyCols = self::MAX_EMPTY_THRESHOLD;
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if ($row > $maxRow) $maxRow = $row;
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if ($col > $maxCol) $maxCol = $col;
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$emptyRow = false;
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}
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}
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if ($emptyRow) {
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$maxEmptyRows--;
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if ($maxEmptyRows == 0) break;
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} else {
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$maxEmptyRows = self::MAX_EMPTY_THRESHOLD;
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}
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}
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return [$maxRow, $maxCol];
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}
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}
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