Add ability to have different exportConversions for PDF

[pappfer]

Now we have an option to convert some text to another with using exportConversions option. However we can only have the same text for all data types, we can't have different text for example for Excel and for PDF files.

I would like the ability to have a 'toPdf' option inside exportConversions so I could display a HTML entity image in a PDF file, while it is not possible in an Excel one.

Scenario:
I have a lot of BooleanColumns in my grid and I don't want to replace them with "Yes/No" or "Active/Incative" texts, I would rather display a tick or a cross icon in the PDF.

Example:

$this->exportConversions = [
    [
        'from' => BooleanColumn::$defaultTrueIcon,
        'to' => Yii::t('app', 'Yes'),
        'toPdf' => '✓'
    ],
    [
        'from' => BooleanColumn::$defaultFalseIcon,
        'to' => Yii::t('app', 'No'),
        'toPdf' => '✗'
    ],
    [
        'from' => Yii::$app->formatter->nullDisplay,
        'to' => '-',
    ],
],

I already wrote the code for it and it works just fine. For Excel it will print "Yes/No" while for PDF is shows icons. I'm submitting a pull request.

[kartik-v]

Thanks. I had a look at your PR - I feel there is a better way to configure this. Will update over this.

[kartik-v]

Enhancement pushed.

You can now override the export conversions for specific types by setting one or both of from_<exptype> and to_<exptype> - for example:

$this->exportConversions = [
    [
        'from' => BooleanColumn::$defaultTrueIcon,
        'to' => Yii::t('app', 'Yes'),
        //'from_pdf' => 'something else', // if you need to set something like this
        'to_pdf' => '✓'
    ],
    [
        'from' => BooleanColumn::$defaultFalseIcon,
        'to' => Yii::t('app', 'No'),
        'to_pdf' => '✗'
    ],
    [
        'from' => Yii::$app->formatter->nullDisplay,
        'to' => '-',
        'from_xls' => 'something only for excel',
        'to_xls' => 'something replaced only for excel',
    ],
],