81 lines
2.6 KiB
PHP
81 lines
2.6 KiB
PHP
<?php
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namespace nur\sery\ext\spreadsheet;
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use nur\sery\ValueException;
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use PhpOffice\PhpSpreadsheet\Cell\Coordinate;
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use PhpOffice\PhpSpreadsheet\Spreadsheet;
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use PhpOffice\PhpSpreadsheet\Worksheet\Worksheet;
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class wsutils {
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static function get_ws(?string $wsname, Spreadsheet $ss, bool $create=false): ?Worksheet {
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if ($wsname == null) {
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$ws = $ss->getActiveSheet();
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} elseif (is_numeric($wsname)) {
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$sheetCount = $ss->getSheetCount();
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if ($wsname < 1 || $wsname > $sheetCount) {
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throw ValueException::invalid_value($wsname, "sheet index");
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}
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$ws = $ss->getSheet($wsname - 1);
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} else {
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$ws = $ss->getSheetByName($wsname);
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if ($ws === null) {
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if ($create) $ws = $ss->createSheet()->setTitle($wsname);
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else throw ValueException::invalid_value($wsname, "sheet name");
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}
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}
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return $ws;
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}
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static function get_highest_coords(Worksheet $ws): array {
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$highestColumnA = $ws->getHighestColumn();
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$highestCol = Coordinate::columnIndexFromString($highestColumnA);
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$highestRow = $ws->getHighestRow();
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return [$highestCol, $highestRow];
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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 $ws): array {
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[$highestCol, $highestRow] = self::get_highest_coords($ws);
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$maxCol = 1;
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$maxRow = 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 ($ws->cellExistsByColumnAndRow($col, $row)) {
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$value = $ws->getCellByColumnAndRow($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 [$maxCol, $maxRow];
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}
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}
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