[XLSX] Chart references are not rename with sheet title update

[guillaume-ro-fr]

This is:

- [x] a bug report

What is the expected behavior?

Chart with sheet reference must be updated on sheet title renaming.

What is the current behavior?

Chart with sheet reference are not updated on sheet title renaming.

What are the steps to reproduce?

Please provide a Minimal, Complete, and Verifiable example of code that exhibits the issue without relying on an external Excel file or a web server:

<?php

require __DIR__ . '/vendor/autoload.php';

// Create new Spreadsheet object
$spreadsheet = new \PhpOffice\PhpSpreadsheet\Spreadsheet();
$worksheet = $spreadsheet->getActiveSheet();
$worksheet->setTitle('Worksheet');
$worksheet->fromArray(
    [
            ['', 2010, 2011, 2012],
            ['Q1', 12, 15, 21],
            ['Q2', 56, 73, 86],
            ['Q3', 52, 61, 69],
            ['Q4', 30, 32, 0],
        ]
);
$dataSeriesLabels = [
    new DataSeriesValues(DataSeriesValues::DATASERIES_TYPE_STRING, 'Worksheet!$B$1', null, 1), // 2010
    new DataSeriesValues(DataSeriesValues::DATASERIES_TYPE_STRING, 'Worksheet!$C$1', null, 1), // 2011
    new DataSeriesValues(DataSeriesValues::DATASERIES_TYPE_STRING, 'Worksheet!$D$1', null, 1), // 2012
];
$xAxisTickValues = [
    new DataSeriesValues(DataSeriesValues::DATASERIES_TYPE_STRING, 'Worksheet!$A$2:$A$5', null, 4), // Q1 to Q4
];
$dataSeriesValues = [
    new DataSeriesValues(DataSeriesValues::DATASERIES_TYPE_NUMBER, 'Worksheet!$B$2:$B$5', null, 4),
    new DataSeriesValues(DataSeriesValues::DATASERIES_TYPE_NUMBER, 'Worksheet!$C$2:$C$5', null, 4),
    new DataSeriesValues(DataSeriesValues::DATASERIES_TYPE_NUMBER, 'Worksheet!$D$2:$D$5', null, 4),
];
$series = new DataSeries(
    DataSeries::TYPE_BARCHART, // plotType
    DataSeries::GROUPING_STACKED, // plotGrouping
    range(0, count($dataSeriesValues) - 1), // plotOrder
    $dataSeriesLabels, // plotLabel
    $xAxisTickValues, // plotCategory
    $dataSeriesValues        // plotValues
);
$series->setPlotDirection(DataSeries::DIRECTION_BAR);
$plotArea = new PlotArea(null, [$series]);
$legend = new Legend(Legend::POSITION_RIGHT, null, false);
$title = new Title('Test Chart');
$yAxisLabel = new Title('Value ($k)');
$chart = new Chart(
    'chart1', // name
    $title, // title
    $legend, // legend
    $plotArea, // plotArea
    true, // plotVisibleOnly
    0, // displayBlanksAs
    null, // xAxisLabel
    $yAxisLabel  // yAxisLabel
);
$chart->setTopLeftPosition('A7');
$chart->setBottomRightPosition('H20');
$worksheet->addChart($chart);
$worksheet->setTitle('Renamed');
$writer = IOFactory::createWriter($spreadsheet, 'Xlsx');
$writer->setIncludeCharts(true);
$writer->save('tmp.xlsx');

Which versions of PhpSpreadsheet and PHP are affected?

PHP 7.1
PhpSpreadsheet 1.5.0

[stale]

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