b55578e40c
The standard margins, expressed in millimeters, could result in the usable page space being much smaller than 1000px used for the DC size when using higher DPIs, which means that the test checking that a 2400px image took only 3 pages could fail, as it could require 4 of them in this case. Fix this by getting rid of the margins, as this should ensure that the page height is exactly 1000px now, independently of the actual DPI.
113 lines
3.1 KiB
C++
113 lines
3.1 KiB
C++
///////////////////////////////////////////////////////////////////////////////
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// Name: tests/html/htmprint.cpp
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// Purpose: wxHtmlPrintout tests
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// Author: Vadim Zeitlin
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// Created: 2018-05-22
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// Copyright: (c) 2018 Vadim Zeitlin <vadim@wxwidgets.org>
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///////////////////////////////////////////////////////////////////////////////
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// ----------------------------------------------------------------------------
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// headers
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// ----------------------------------------------------------------------------
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#include "testprec.h"
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#if wxUSE_HTML
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#ifdef __BORLANDC__
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#pragma hdrstop
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#endif
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#ifndef WX_PRECOMP
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#include "wx/dcmemory.h"
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#endif // WX_PRECOMP
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#include "wx/html/htmprint.h"
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namespace
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{
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// Return the number of pages in the printout.
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int CountPages(wxHtmlPrintout& pr)
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{
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REQUIRE_NOTHROW( pr.OnPreparePrinting() );
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int pageMin = -1,
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pageMax = -1,
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selFrom = -1,
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selTo = -1;
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REQUIRE_NOTHROW( pr.GetPageInfo(&pageMin, &pageMax, &selFrom, &selTo) );
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// This should be always the case.
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CHECK( pageMin == 1 );
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// Return the really interesting value to the caller.
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return pageMax;
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}
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} // anonymous namespace
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TEST_CASE("wxHtmlPrintout::Pagination", "[html][print]")
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{
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wxHtmlPrintout pr;
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// Pagination works in terms of printer page size, which is obtained by
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// subtracting margins from the total size and margins are expressed in
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// millimeters, so their conversion to pixels depends on DPI. To ensure
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// that we get the same results for all values of DPI, get just get rid
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// of the margins entirely (it would also be possible to adjust them by
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// the DPI-dependent factor, but it doesn't seem to be worth doing it).
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pr.SetMargins(0, 0, 0, 0, 0);
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wxBitmap bmp(1000, 1000);
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wxMemoryDC dc(bmp);
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pr.SetUp(dc);
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// Empty or short HTML documents should be printed on a single page only.
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CHECK( CountPages(pr) == 1 );
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pr.SetHtmlText("<p>Hello world!</p>");
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CHECK( CountPages(pr) == 1 );
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// This one should be too big to fit on a single page.
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pr.SetHtmlText
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(
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"<img width=\"100\" height=\"600\" src=\"dummy\"/>"
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"<br/>"
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"<img width=\"100\" height=\"600\" src=\"dummy\"/>"
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);
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CHECK( CountPages(pr) == 2 );
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// Special case: normally images are not split, but if the image height is
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// greater than the page height, it should be.
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pr.SetHtmlText
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(
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"<img width=\"100\" height=\"2500\" src=\"dummy\"/>"
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);
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CHECK( CountPages(pr) == 3 );
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// Test explicit page breaks too.
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pr.SetHtmlText
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(
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"First page"
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"<div style=\"page-break-before:always\"/>"
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"Second page"
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);
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CHECK( CountPages(pr) == 2 );
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pr.SetHtmlText
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(
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"Something"
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"<div style=\"page-break-before:always\">"
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"<div style=\"page-break-before:always\">"
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"<div style=\"page-break-before:always\">"
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"whatever"
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"</div>"
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"</div>"
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"</div>"
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);
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CHECK( CountPages(pr) == 2 );
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}
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#endif //wxUSE_HTML
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