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Summary: This adds a combobox in the print dialog of the non-PDF generators to allow selecting whether or not to take print margins into account. For the PDF case and rasterized printing, new print otions have been implemented in commit 2e97d587 already, which adds an additional option to do no scaling at all. For consistency reasons, the same terms also used for the PDF case are used in the combobox (i.e. the two of the three that apply). This adds a new abstract class 'PrintOptionsWidget' with a 'ignorePrintMargins()' method to indicate whether print margins should be ignored or not, and a default implementation. The existing widget for the PDF generator now derives from this class. In order to avoid an ABI breakage, the return value of 'Document::printConfigurationWidget' is left as a 'QWidget *' and a dynamic_cast is done on use. FilePrinter is adapted to take into account the value set by 'QPrinter::setFullPage()' and the margin options are now passed accordingly (either the values set in the dialog or '0'). A big thanks to Albert Astals Cid <aacid@kde.org> for showing how to extend the initial implementation to cover more generators. Test Plan: 1) Open a PostScript file in Okular (using a document size that matches a paper size available on the printer used later makes it easier to see things behave as expected) 2) open print dialog, go to "Print options" and notice that there is a new "Scale mode" combobox whose value is set to "Fit to printable area" by default. 3) don't change any options, print to a printer that has hardware margins Expected result: the document is scaled to the printable area (e.g. scaled down so that the printer's hardware margins remain empty) as it has been without this change. 4) Set the value of the "Print Options" -> "Scale mode" combobox to "Fit to full page" and print again Expected result: The document is scaled to the full page size, i.e. ignoring the printer's hardware margins. 5) Try steps 1-4 with other document formats supported by Okular and observe that they behave the same (except for the PDF case, where there's a combobox with three options that has been implemented independent of this change). Reviewers: #okular, ngraham Reviewed By: ngraham Subscribers: fvogt, rkflx, arthurpeters, ltoscano, okular-devel, aacid, ngraham Tags: #okular Differential Revision: https://phabricator.kde.org/D10974
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