X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/2b5f62a0b2db198609b45dec622a018dae37008e..12bb29f5432174ecbd65549bda832d70d34a98ae:/src/html/m_layout.cpp?ds=inline diff --git a/src/html/m_layout.cpp b/src/html/m_layout.cpp index aeb0478d49..cfe6a711fe 100644 --- a/src/html/m_layout.cpp +++ b/src/html/m_layout.cpp @@ -1,27 +1,23 @@ ///////////////////////////////////////////////////////////////////////////// -// Name: m_layout.cpp +// Name: src/html/m_layout.cpp // Purpose: wxHtml module for basic paragraphs/layout handling // Author: Vaclav Slavik // RCS-ID: $Id$ // Copyright: (c) 1999 Vaclav Slavik -// Licence: wxWindows Licence +// Licence: wxWindows licence ///////////////////////////////////////////////////////////////////////////// -#ifdef __GNUG__ -#pragma implementation -#endif #include "wx/wxprec.h" - -#include "wx/defs.h" -#if wxUSE_HTML && wxUSE_STREAMS #ifdef __BORLANDC__ -#pragma hdrstop + #pragma hdrstop #endif -#ifndef WXPRECOMP -#endif +#if wxUSE_HTML && wxUSE_STREAMS +#ifndef WX_PRECOMP + #include "wx/image.h" +#endif #include "wx/html/forcelnk.h" #include "wx/html/m_templ.h" @@ -30,19 +26,123 @@ FORCE_LINK_ME(m_layout) +#ifdef __WXWINCE__ + #include "wx/msw/wince/missing.h" // for bsearch() +#else + #include // bsearch() +#endif + +//----------------------------------------------------------------------------- +// 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, + const wxArrayInt& known_pagebreaks, + int pageHeight) const; + + void Draw(wxDC& WXUNUSED(dc), + int WXUNUSED(x), int WXUNUSED(y), + int WXUNUSED(view_y1), int WXUNUSED(view_y2), + wxHtmlRenderingInfo& WXUNUSED(info)) {} + +private: + wxDECLARE_NO_COPY_CLASS(wxHtmlPageBreakCell); +}; + +bool +wxHtmlPageBreakCell::AdjustPagebreak(int* pagebreak, + const wxArrayInt& known_pagebreaks, + int WXUNUSED(pageHeight)) 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( known_pagebreaks.GetCount() == 0 || *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; + for ( wxHtmlCell *parent = GetParent(); parent; parent = parent->GetParent() ) + { + total_height += parent->GetPosY(); + } + + + // Search the array of pagebreaks to see whether we've already set + // a pagebreak here. + int where = known_pagebreaks.Index( total_height); + // Add a pagebreak only if there isn't one already set here. + if( wxNOT_FOUND != 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(); } m_WParser->GetContainer()->SetIndent(m_WParser->GetCharHeight(), wxHTML_INDENT_TOP); m_WParser->GetContainer()->SetAlign(tag); - return FALSE; + return false; } TAG_HANDLER_END(P) @@ -50,6 +150,7 @@ TAG_HANDLER_END(P) TAG_HANDLER_BEGIN(BR, "BR") + TAG_HANDLER_CONSTR(BR) { } TAG_HANDLER_PROC(tag) { @@ -61,7 +162,7 @@ TAG_HANDLER_BEGIN(BR, "BR") c->SetAlignHor(al); c->SetAlign(tag); c->SetMinHeight(m_WParser->GetCharHeight()); - return FALSE; + return false; } TAG_HANDLER_END(BR) @@ -69,6 +170,7 @@ TAG_HANDLER_END(BR) TAG_HANDLER_BEGIN(CENTER, "CENTER") + TAG_HANDLER_CONSTR(CENTER) { } TAG_HANDLER_PROC(tag) { @@ -76,7 +178,7 @@ 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(); @@ -89,7 +191,7 @@ TAG_HANDLER_BEGIN(CENTER, "CENTER") ParseInner(tag); m_WParser->SetAlign(old); - if (c->GetFirstCell() != NULL) + if (c->GetFirstChild() != NULL) { m_WParser->CloseContainer(); m_WParser->OpenContainer(); @@ -97,9 +199,9 @@ TAG_HANDLER_BEGIN(CENTER, "CENTER") else c->SetAlignHor(old); - return TRUE; + return true; } - else return FALSE; + else return false; } TAG_HANDLER_END(CENTER) @@ -107,37 +209,70 @@ 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) + if(tag.HasParam(wxT("STYLE"))) { - m_WParser->CloseContainer(); - m_WParser->OpenContainer(); - c = m_WParser->GetContainer(); - c->SetAlign(tag); - m_WParser->SetAlign(c->GetAlignHor()); + 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 + else if(tag.HasParam(wxT("ALIGN"))) { - c->SetAlign(tag); - m_WParser->SetAlign(c->GetAlignHor()); - } + 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); + { + // Same as BR + int al = m_WParser->GetContainer()->GetAlignHor(); + wxHtmlContainerCell *c; - return TRUE; + m_WParser->CloseContainer(); + c = m_WParser->OpenContainer(); + c->SetAlignHor(al); + c->SetAlign(tag); + c->SetMinHeight(m_WParser->GetCharHeight()); + return false; + } } TAG_HANDLER_END(DIV) @@ -146,20 +281,28 @@ TAG_HANDLER_END(DIV) TAG_HANDLER_BEGIN(TITLE, "TITLE") + TAG_HANDLER_CONSTR(TITLE) { } TAG_HANDLER_PROC(tag) { - if (m_WParser->GetWindow()) + wxHtmlWindowInterface *winIface = m_WParser->GetWindowInterface(); + if (winIface) { - wxHtmlWindow *wfr = (wxHtmlWindow*)(m_WParser->GetWindow()); - if (wfr) + wxString title(tag.GetBeginIter(), tag.GetEndIter1()); +#if !wxUSE_UNICODE + const wxFontEncoding enc = m_WParser->GetInputEncoding(); + if ( enc != wxFONTENCODING_DEFAULT ) { - const wxString& src = *m_WParser->GetSource(); - wfr->OnSetTitle(src.Mid(tag.GetBeginPos(), - tag.GetEndPos1()-tag.GetBeginPos())); + // need to convert to the current one + title = wxString(title.wc_str(wxCSConv(enc)), wxConvLocal); } +#endif // !wxUSE_UNICODE + + title = m_WParser->GetEntitiesParser()->Parse(title); + + winIface->SetHTMLWindowTitle(title); } - return TRUE; + return true; } TAG_HANDLER_END(TITLE) @@ -168,6 +311,7 @@ TAG_HANDLER_END(TITLE) TAG_HANDLER_BEGIN(BODY, "BODY") + TAG_HANDLER_CONSTR(BODY) { } TAG_HANDLER_PROC(tag) { @@ -182,14 +326,40 @@ TAG_HANDLER_BEGIN(BODY, "BODY") if (tag.GetParamAsColour(wxT("LINK"), &clr)) m_WParser->SetLinkColor(clr); + wxHtmlWindowInterface *winIface = m_WParser->GetWindowInterface(); + // the rest of this function requires a window: + if ( !winIface ) + return false; + + if (tag.HasParam(wxT("BACKGROUND"))) + { + wxFSFile *fileBgImage = m_WParser->OpenURL + ( + wxHTML_URL_IMAGE, + tag.GetParam(wxT("BACKGROUND")) + ); + if ( fileBgImage ) + { + wxInputStream *is = fileBgImage->GetStream(); + if ( is ) + { + wxImage image(*is); + if ( image.IsOk() ) + winIface->SetHTMLBackgroundImage(image); + } + + delete fileBgImage; + } + } + 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); + new wxHtmlColourCell(clr, wxHTML_CLR_TRANSPARENT_BACKGROUND)); + winIface->SetHTMLBackgroundColour(clr); } - return FALSE; + + return false; } TAG_HANDLER_END(BODY) @@ -197,6 +367,7 @@ TAG_HANDLER_END(BODY) TAG_HANDLER_BEGIN(BLOCKQUOTE, "BLOCKQUOTE") + TAG_HANDLER_CONSTR(BLOCKQUOTE) { } TAG_HANDLER_PROC(tag) { @@ -217,13 +388,62 @@ TAG_HANDLER_BEGIN(BLOCKQUOTE, "BLOCKQUOTE") c->SetIndent(m_WParser->GetCharHeight(), wxHTML_INDENT_BOTTOM); m_WParser->CloseContainer(); m_WParser->OpenContainer(); - return TRUE; + return true; } TAG_HANDLER_END(BLOCKQUOTE) +TAG_HANDLER_BEGIN(SUBSUP, "SUB,SUP") + + TAG_HANDLER_PROC(tag) + { + bool issub = (tag.GetName() == wxT("SUB")); + wxHtmlScriptMode oldmode = m_WParser->GetScriptMode(); + int oldbase = m_WParser->GetScriptBaseline(); + int oldsize = m_WParser->GetFontSize(); + + wxHtmlContainerCell *cont = m_WParser->GetContainer(); + wxHtmlCell *c = cont->GetLastChild(); + + m_WParser->SetScriptMode(issub ? wxHTML_SCRIPT_SUB : wxHTML_SCRIPT_SUP); + m_WParser->SetScriptBaseline( + oldbase + c ? c->GetScriptBaseline() : 0); + + // select smaller font + m_WParser->SetFontSize(m_WParser->GetFontSize()-2); + cont->InsertCell(new wxHtmlFontCell(m_WParser->CreateCurrentFont())); + + ParseInner(tag); + + // restore font size + m_WParser->SetFontSize(oldsize); + m_WParser->GetContainer()->InsertCell( + new wxHtmlFontCell(m_WParser->CreateCurrentFont())); + + // restore base and alignment + m_WParser->SetScriptBaseline(oldbase); + m_WParser->SetScriptMode(oldmode); + + return true; + } + +TAG_HANDLER_END(SUBSUP) + + +// 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) + + @@ -236,6 +456,8 @@ TAGS_MODULE_BEGIN(Layout) TAGS_MODULE_ADD(TITLE) TAGS_MODULE_ADD(BODY) TAGS_MODULE_ADD(BLOCKQUOTE) + TAGS_MODULE_ADD(SUBSUP) + TAGS_MODULE_ADD(DoNothing) TAGS_MODULE_END(Layout)