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print: RFC: Center when printing a PDF with smaller size than the output page.

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This builds on top of #13100, but this changes printing behavior intentionally
so I thought it was worth discussing separately, to improve the rendering on
test-cases like the one in https://bugzil.la/1697778.

This matches what e.g.  Evince does when you print the PDF in there on an A4
printer.

We use margins to center horizontally, and flex to center vertically. The
reasoning for this is that it should have better browser support (though maybe
pdf.js no longer supports browsers without flex support?) and it's just as
simple.
This commit is contained in:
Emilio Cobos Álvarez 2021-03-14 15:54:37 +01:00
parent eb92ed12f2
commit 1d70bfe6e6
1 changed files with 9 additions and 0 deletions
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web/viewer.css
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@ -1763,6 +1763,15 @@ html[dir="rtl"] #documentPropertiesOverlay .row > * {
max-height: 100%;
page-break-after: always;
page-break-inside: avoid;
/* If we're smaller than the page, center the canvas horizontally and
* vertically */
min-height: 100%;
min-width: 100%;
display: flex;
flex-direction: column;
justify-content: center;
align-items: center;
}
#printContainer canvas,
#printContainer img {