X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/4f9297b0eead20a0bfee71df18e0d8f0cbc402fb..2d4957f2401a8814f90cda21ef945d99bc74596e:/src/html/m_layout.cpp diff --git a/src/html/m_layout.cpp b/src/html/m_layout.cpp index c026d8cabb..aa9ea66ee1 100644 --- a/src/html/m_layout.cpp +++ b/src/html/m_layout.cpp @@ -6,7 +6,7 @@ // Copyright: (c) 1999 Vaclav Slavik // Licence: wxWindows Licence ///////////////////////////////////////////////////////////////////////////// -#ifdef __GNUG__ +#if defined(__GNUG__) && !defined(NO_GCC_PRAGMA) #pragma implementation #endif @@ -15,12 +15,11 @@ #include "wx/defs.h" #if wxUSE_HTML && wxUSE_STREAMS -#ifdef __BORDLANDC__ +#ifdef __BORLANDC__ #pragma hdrstop #endif #ifndef WXPRECOMP -#include "wx/wx.h" #endif @@ -32,12 +31,114 @@ FORCE_LINK_ME(m_layout) +#include // bsearch() + +//----------------------------------------------------------------------------- +// wxHtmlPageBreakCell +//----------------------------------------------------------------------------- + +// Since html isn't a page-layout language, it doesn't support page +// page breaks directly--that requires CSS2 support. But a page-break +// facility is handy, and has been requested more than once on the +// mailing lists. This wxHtml tag handler implements just enough of +// CSS2 to support a page break by recognizing only +//
+// +// wxHtml maintains page breaks in wxHtmlPrintout::m_PageBreaks. The +// tag handler below adds appropriate offsets to that array member. +// wxHtmlDCRenderer::Render() accesses that array and makes a new page +// begin after each page-break tag. + +// The page-break handler does all its work in AdjustPagebreak(). For +// all tag handlers, that function adjusts the page-break position. +// For other tags, it determines whether the html element can fit on +// the remainder of the page; if it cannot fit, but must not be split, +// then the function moves the page break provided in the argument up, +// and returns 'true' to inform the caller that the argument was +// modified. +// +// Due to its special purpose, the page-break facility differs from +// other tags. It takes up no space, but it behaves as though there is +// never enough room to fit it on the remainder of the page--it always +// forces a page break. Therefore, unlike other elements that trigger +// a page break, it would never 'fit' on the following page either. +// Therefore it's necessary to compare each pagebreak candidate to the +// array wxHtmlPrintout::m_PageBreaks of pagebreaks already set, and +// set a new one only if it's not in that array. + +class wxHtmlPageBreakCell : public wxHtmlCell +{ +public: + wxHtmlPageBreakCell() {} + + bool AdjustPagebreak(int* pagebreak, + int* known_pagebreaks = NULL, + int number_of_pages = 0) const; + void Draw(wxDC& WXUNUSED(dc), + int WXUNUSED(x), int WXUNUSED(y), + int WXUNUSED(view_y1), int WXUNUSED(view_y2), + wxHtmlRenderingInfo& WXUNUSED(info)) {} + +private: + DECLARE_NO_COPY_CLASS(wxHtmlPageBreakCell) +}; + +// Comparison routine for bsearch into an int* array of pagebreaks. +extern "C" int wxCMPFUNC_CONV wxInteger_compare(void const* i0, void const* i1) +{ + return *(int*)i0 - *(int*)i1; +} + +bool wxHtmlPageBreakCell::AdjustPagebreak(int* pagebreak, int* known_pagebreaks, int number_of_pages) const +{ + // When we are counting pages, 'known_pagebreaks' is non-NULL. + // That's the only time we change 'pagebreak'. Otherwise, pages + // were already counted, 'known_pagebreaks' is NULL, and we don't + // do anything except return FALSE. + // + // We also simply return FALSE if the 'pagebreak' argument is + // less than (vertically above) or the same as the current + // vertical position. Otherwise we'd be setting a pagebreak above + // the current cell, which is incorrect, or duplicating a + // pagebreak that has already been set. + if(NULL == known_pagebreaks || *pagebreak <= m_PosY) + { + return FALSE; + } + + // m_PosY is only the vertical offset from the parent. The pagebreak + // required here is the total page offset, so m_PosY must be added + // to the parent's offset and height. + int total_height = m_PosY + GetParent()->GetPosY() + GetParent()->GetHeight(); + + // Search the array of pagebreaks to see whether we've already set + // a pagebreak here. The standard bsearch() function is appropriate + // because the array of pagebreaks through known_pagebreaks[number_of_pages] + // is known to be sorted in strictly increasing order. '1 + number_of_pages' + // is used as a bsearch() argument because the array contains a leading + // zero plus one element for each page. + int* where = (int*) bsearch(&total_height, known_pagebreaks, + 1 + number_of_pages, sizeof(int), + wxInteger_compare); + // Add a pagebreak only if there isn't one already set here. + if(NULL != where) + { + return FALSE; + } + else + { + *pagebreak = m_PosY; + return TRUE; + } +} + TAG_HANDLER_BEGIN(P, "P") + TAG_HANDLER_CONSTR(P) { } TAG_HANDLER_PROC(tag) { - if (m_WParser->GetContainer()->GetFirstCell() != NULL) - { + if (m_WParser->GetContainer()->GetFirstChild() != NULL) + { m_WParser->CloseContainer(); m_WParser->OpenContainer(); } @@ -51,12 +152,13 @@ TAG_HANDLER_END(P) TAG_HANDLER_BEGIN(BR, "BR") + TAG_HANDLER_CONSTR(BR) { } TAG_HANDLER_PROC(tag) { int al = m_WParser->GetContainer()->GetAlignHor(); wxHtmlContainerCell *c; - + m_WParser->CloseContainer(); c = m_WParser->OpenContainer(); c->SetAlignHor(al); @@ -70,6 +172,7 @@ TAG_HANDLER_END(BR) TAG_HANDLER_BEGIN(CENTER, "CENTER") + TAG_HANDLER_CONSTR(CENTER) { } TAG_HANDLER_PROC(tag) { @@ -77,21 +180,21 @@ TAG_HANDLER_BEGIN(CENTER, "CENTER") wxHtmlContainerCell *c = m_WParser->GetContainer(); m_WParser->SetAlign(wxHTML_ALIGN_CENTER); - if (c->GetFirstCell() != NULL) - { + if (c->GetFirstChild() != NULL) + { m_WParser->CloseContainer(); m_WParser->OpenContainer(); } else c->SetAlignHor(wxHTML_ALIGN_CENTER); - if (tag.HasEnding()) - { + if (tag.HasEnding()) + { ParseInner(tag); m_WParser->SetAlign(old); - if (c->GetFirstCell() != NULL) - { + if (c->GetFirstChild() != NULL) + { m_WParser->CloseContainer(); m_WParser->OpenContainer(); } @@ -108,37 +211,61 @@ TAG_HANDLER_END(CENTER) TAG_HANDLER_BEGIN(DIV, "DIV") + TAG_HANDLER_CONSTR(DIV) { } TAG_HANDLER_PROC(tag) { - int old = m_WParser->GetAlign(); - wxHtmlContainerCell *c = m_WParser->GetContainer(); - if (c->GetFirstCell() != NULL) - { - m_WParser->CloseContainer(); - m_WParser->OpenContainer(); - c = m_WParser->GetContainer(); - c->SetAlign(tag); - m_WParser->SetAlign(c->GetAlignHor()); - } - else - { - c->SetAlign(tag); - m_WParser->SetAlign(c->GetAlignHor()); + if(tag.HasParam(wxT("STYLE"))) + { + if(tag.GetParam(wxT("STYLE")).IsSameAs(wxT("PAGE-BREAK-BEFORE:ALWAYS"), FALSE)) + { + m_WParser->CloseContainer(); + m_WParser->OpenContainer()->InsertCell(new wxHtmlPageBreakCell); + m_WParser->CloseContainer(); + m_WParser->OpenContainer(); + return FALSE; + } + else + { + // Treat other STYLE parameters here when they're supported. + return FALSE; + } } + else if(tag.HasParam(wxT("ALIGN"))) + { + int old = m_WParser->GetAlign(); + wxHtmlContainerCell *c = m_WParser->GetContainer(); + if (c->GetFirstChild() != NULL) + { + m_WParser->CloseContainer(); + m_WParser->OpenContainer(); + c = m_WParser->GetContainer(); + c->SetAlign(tag); + m_WParser->SetAlign(c->GetAlignHor()); + } + else + { + c->SetAlign(tag); + m_WParser->SetAlign(c->GetAlignHor()); + } - ParseInner(tag); + ParseInner(tag); - m_WParser->SetAlign(old); - if (c->GetFirstCell() != NULL) - { - m_WParser->CloseContainer(); - m_WParser->OpenContainer(); + m_WParser->SetAlign(old); + if (c->GetFirstChild() != NULL) + { + m_WParser->CloseContainer(); + m_WParser->OpenContainer(); + } + else + c->SetAlignHor(old); + + return TRUE; } else - c->SetAlignHor(old); - - return TRUE; + { + return FALSE; + } } TAG_HANDLER_END(DIV) @@ -147,19 +274,18 @@ TAG_HANDLER_END(DIV) TAG_HANDLER_BEGIN(TITLE, "TITLE") + TAG_HANDLER_CONSTR(TITLE) { } TAG_HANDLER_PROC(tag) { - if (m_WParser->GetWindow()) - { + if (m_WParser->GetWindow()) + { wxHtmlWindow *wfr = (wxHtmlWindow*)(m_WParser->GetWindow()); - if (wfr) - { - wxString title = ""; - wxString *src = m_WParser->GetSource(); - - for (int i = tag.GetBeginPos(); i < tag.GetEndPos1(); i++) title += (*src)[(unsigned int) i]; - wfr->OnSetTitle(title); + if (wfr) + { + const wxString& src = *m_WParser->GetSource(); + wfr->OnSetTitle(src.Mid(tag.GetBeginPos(), + tag.GetEndPos1()-tag.GetBeginPos())); } } return TRUE; @@ -171,40 +297,27 @@ TAG_HANDLER_END(TITLE) TAG_HANDLER_BEGIN(BODY, "BODY") + TAG_HANDLER_CONSTR(BODY) { } TAG_HANDLER_PROC(tag) { - unsigned long tmp; wxColour clr; - if (tag.HasParam(wxT("TEXT"))) - { - if (tag.ScanParam(wxT("TEXT"), wxT("#%lX"), &tmp) == 1) - { - clr = wxColour((tmp & 0xFF0000) >> 16 , (tmp & 0x00FF00) >> 8, (tmp & 0x0000FF)); - m_WParser->SetActualColor(clr); - m_WParser->GetContainer()->InsertCell(new wxHtmlColourCell(clr)); - } - } - - if (tag.HasParam(wxT("LINK"))) - { - if (tag.ScanParam(wxT("LINK"), wxT("#%lX"), &tmp) == 1) - { - clr = wxColour((tmp & 0xFF0000) >> 16 , (tmp & 0x00FF00) >> 8, (tmp & 0x0000FF)); - m_WParser->SetLinkColor(clr); - } + if (tag.GetParamAsColour(wxT("TEXT"), &clr)) + { + m_WParser->SetActualColor(clr); + m_WParser->GetContainer()->InsertCell(new wxHtmlColourCell(clr)); } - if (tag.HasParam(wxT("BGCOLOR"))) - { - if (tag.ScanParam(wxT("BGCOLOR"), wxT("#%lX"), &tmp) == 1) - { - clr = wxColour((tmp & 0xFF0000) >> 16 , (tmp & 0x00FF00) >> 8, (tmp & 0x0000FF)); - m_WParser->GetContainer()->InsertCell(new wxHtmlColourCell(clr, wxHTML_CLR_BACKGROUND)); - if (m_WParser->GetWindow() != NULL) - m_WParser->GetWindow()->SetBackgroundColour(clr); - } + if (tag.GetParamAsColour(wxT("LINK"), &clr)) + m_WParser->SetLinkColor(clr); + + if (tag.GetParamAsColour(wxT("BGCOLOR"), &clr)) + { + m_WParser->GetContainer()->InsertCell( + new wxHtmlColourCell(clr, wxHTML_CLR_BACKGROUND)); + if (m_WParser->GetWindow() != NULL) + m_WParser->GetWindow()->SetBackgroundColour(clr); } return FALSE; } @@ -214,20 +327,21 @@ TAG_HANDLER_END(BODY) TAG_HANDLER_BEGIN(BLOCKQUOTE, "BLOCKQUOTE") + TAG_HANDLER_CONSTR(BLOCKQUOTE) { } TAG_HANDLER_PROC(tag) { wxHtmlContainerCell *c; - + m_WParser->CloseContainer(); c = m_WParser->OpenContainer(); - - if (c->GetAlignHor() == wxHTML_ALIGN_RIGHT) + + if (c->GetAlignHor() == wxHTML_ALIGN_RIGHT) c->SetIndent(5 * m_WParser->GetCharWidth(), wxHTML_INDENT_RIGHT); else c->SetIndent(5 * m_WParser->GetCharWidth(), wxHTML_INDENT_LEFT); - - c->SetIndent(m_WParser->GetCharHeight(), wxHTML_INDENT_TOP); + + c->SetIndent(m_WParser->GetCharHeight(), wxHTML_INDENT_TOP); m_WParser->OpenContainer(); ParseInner(tag); c = m_WParser->CloseContainer(); @@ -241,6 +355,16 @@ TAG_HANDLER_END(BLOCKQUOTE) +// Tag handler for tags that we have to ignore, otherwise non-text data +// would show up as text: +TAG_HANDLER_BEGIN(DoNothing, "SCRIPT") + TAG_HANDLER_CONSTR(DoNothing) { } + + TAG_HANDLER_PROC(WXUNUSED(tag)) + { + return true; + } +TAG_HANDLER_END(DoNothing) @@ -253,6 +377,7 @@ TAGS_MODULE_BEGIN(Layout) TAGS_MODULE_ADD(TITLE) TAGS_MODULE_ADD(BODY) TAGS_MODULE_ADD(BLOCKQUOTE) + TAGS_MODULE_ADD(DoNothing) TAGS_MODULE_END(Layout)