199 lines
7.4 KiB
C++
199 lines
7.4 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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#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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// Use font size in pixels to make it DPI-independent: if we just used a
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// normal (say 12pt) font, it would have different height in pixels on 96
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// and 200 DPI systems, meaning that the text at the end of this test would
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// take different number of (fixed to 1000px height) pages.
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//
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// We could also make the page height proportional to the DPI, but this
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// would be more complicated as we also wouldn't be able to use hardcoded
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// height attribute values in the HTML snippets below then.
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const wxFont fontFixedPixelSize(wxFontInfo(wxSize(10, 16)));
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pr.SetStandardFonts(fontFixedPixelSize.GetPointSize(), "Helvetica");
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// We currently have to do this with wxGTK3 which uses 72 DPI for its
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// wxMemoryDC, resulting in 3/4 scaling (because screen DPI is hardcoded as
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// 96 in src/html/htmprint.cpp), when rendering onto it. This makes the
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// tests pass, but really shouldn't be necessary. Unfortunately it's not
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// clear where and how should this be fixed.
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#ifdef __WXGTK3__
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pr.SetPPIPrinter(wxSize(96, 96));
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#endif
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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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// Also test that forbidding page breaks inside a paragraph works: it
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// should move it entirely to the next page, resulting in one extra page
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// compared to the version without "page-break-inside: avoid".
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static const char* const text =
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"Early in the morning on the fourteenth of the spring month of Nisan the<br>"
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"Procurator of Judea, Pontius Pilate, in a white cloak lined with blood red,<br>"
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"emerged with his shuffling cavalryman's walk into the arcade connecting the two<br>"
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"wings of the palace of Herod the Great.<br>"
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"<br>"
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"More than anything else in the world the Procurator hated the smell of attar of<br>"
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"roses. The omens for the day were bad, as this scent had been haunting him<br>"
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"since dawn.<br>"
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"<br>"
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"It seemed to the Procurator that the very cypresses and palms in the garden<br>"
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"were exuding the smell of roses, that this damned stench of roses was even<br>"
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"mingling with the smell of leather tackle and sweat from his mounted bodyguard.<br>"
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"<br>"
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"A haze of smoke was drifting toward the arcade across the upper courtyard of<br>"
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"the garden, coming from the wing at the rear of the palace, the quarters of the<br>"
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"first cohort of the XII Legion; known as the \"Lightning,\" it had been<br>"
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"stationed in Jerusalem since the Procurator's arrival. The same oily perfume<br>"
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"of roses was mixed with the acrid smoke that showed that the centuries' cooks<br>"
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"had started to prepare breakfast<br>"
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"<br>"
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"\"Oh, gods, what are you punishing me for?.. No, there's no doubt, I have it<br>"
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"again, this terrible incurable pain... hemicrania, when half the head aches...<br>"
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"There's no cure for it, nothing helps... I must try not to move my head...\"<br>"
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"<br>"
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"A chair had already been placed on the mosaic floor by the fountain; without a<br>"
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"glance around, the Procurator sat in it and stretched out his hand to one side.<br>"
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"His secretary deferentially laid a piece of parchment in his hand. Unable to<br>"
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"restrain a grimace of agony, the Procurator gave a fleeting sideways look at<br>"
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"its contents, returned the parchment to his secretary and said painfully, \"The<br>"
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"accused comes from Galilee, does he? Was the case sent to the tetrarch?\"<br>"
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"<br>"
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"\"Yes, Procurator,\" replied the secretary. \"He declined to confirm the<br>"
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"finding of the court and passed the Sanhedrin's sentence of death to you for<br>"
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"confirmation.\"<br>"
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"<br>"
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"The Procurator's cheek twitched, and he said quietly, \"Bring in the accused.\"<br>"
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;
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pr.SetHtmlText
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(
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wxString::Format
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(
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"<img width=\"100\" height=\"500\" src=\"dummy\"/>"
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"<div>%s</div>"
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"<br/>"
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"<img width=\"100\" height=\"500\" src=\"dummy\"/>",
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text
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)
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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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wxString::Format
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(
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"<img width=\"100\" height=\"500\" src=\"dummy\"/>"
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"<div style=\"page-break-inside:avoid\">%s</div>"
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"<br/>"
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"<img width=\"100\" height=\"500\" src=\"dummy\"/>",
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text
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)
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);
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INFO("Using base font size " << fontFixedPixelSize.GetPointSize());
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CHECK( CountPages(pr) == 3 );
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}
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#endif //wxUSE_HTML
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