X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/314260fbd07ecebb43c60d147e1f4580a7159e42..e87fb0ee85cfb1f3cf5bd83e79e8e32e9b0f3b1a:/src/html/m_layout.cpp diff --git a/src/html/m_layout.cpp b/src/html/m_layout.cpp index 4fd163e68b..abd44132e9 100644 --- a/src/html/m_layout.cpp +++ b/src/html/m_layout.cpp @@ -1,5 +1,5 @@ ///////////////////////////////////////////////////////////////////////////// -// Name: mod_layout.cpp +// Name: m_layout.cpp // Purpose: wxHtml module for basic paragraphs/layout handling // Author: Vaclav Slavik // RCS-ID: $Id$ @@ -14,13 +14,12 @@ #include "wx/defs.h" -#if wxUSE_HTML -#ifdef __BORDLANDC__ +#if wxUSE_HTML && wxUSE_STREAMS +#ifdef __BORLANDC__ #pragma hdrstop #endif #ifndef WXPRECOMP -#include "wx/wx.h" #endif @@ -29,19 +28,121 @@ #include "wx/html/htmlwin.h" -FORCE_LINK_ME(mod_layout) +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 WXDLLEXPORT 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), + wxHtmlRenderingState& WXUNUSED(state)) {} + +private: + DECLARE_NO_COPY_CLASS(wxHtmlPageBreakCell) +}; + +// Comparison routine for bsearch into an int* array of pagebreaks. +static int integer_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), + integer_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_PROC(tag) { - if (m_WParser -> GetContainer() -> GetFirstCell() != NULL) { - m_WParser -> CloseContainer(); - m_WParser -> OpenContainer(); - } - m_WParser -> GetContainer() -> SetIndent(m_WParser -> GetCharHeight(), wxHTML_INDENT_TOP); - m_WParser -> GetContainer() -> SetAlign(tag); + 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; } @@ -53,13 +154,14 @@ TAG_HANDLER_BEGIN(BR, "BR") TAG_HANDLER_PROC(tag) { - int al = m_WParser -> GetContainer() -> GetAlignHor(); + int al = m_WParser->GetContainer()->GetAlignHor(); wxHtmlContainerCell *c; - - m_WParser -> CloseContainer(); - c = m_WParser -> OpenContainer(); - c -> SetAlignHor(al); - c -> SetAlign(tag); + + m_WParser->CloseContainer(); + c = m_WParser->OpenContainer(); + c->SetAlignHor(al); + c->SetAlign(tag); + c->SetMinHeight(m_WParser->GetCharHeight()); return FALSE; } @@ -71,27 +173,30 @@ TAG_HANDLER_BEGIN(CENTER, "CENTER") TAG_HANDLER_PROC(tag) { - int old = m_WParser -> GetAlign(); - wxHtmlContainerCell *c = m_WParser -> GetContainer(); - - m_WParser -> SetAlign(wxHTML_ALIGN_CENTER); - if (c -> GetFirstCell() != NULL) { - m_WParser -> CloseContainer(); - m_WParser -> OpenContainer(); + int old = m_WParser->GetAlign(); + wxHtmlContainerCell *c = m_WParser->GetContainer(); + + m_WParser->SetAlign(wxHTML_ALIGN_CENTER); + if (c->GetFirstChild() != NULL) + { + m_WParser->CloseContainer(); + m_WParser->OpenContainer(); } else - c -> SetAlignHor(wxHTML_ALIGN_CENTER); + c->SetAlignHor(wxHTML_ALIGN_CENTER); - if (tag.HasEnding()) { + if (tag.HasEnding()) + { 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); + c->SetAlignHor(old); return TRUE; } @@ -106,31 +211,57 @@ TAG_HANDLER_BEGIN(DIV, "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) @@ -142,14 +273,14 @@ TAG_HANDLER_BEGIN(TITLE, "TITLE") TAG_HANDLER_PROC(tag) { - 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)[i]; - wfr -> SetTitle(title); + if (m_WParser->GetWindow()) + { + wxHtmlWindow *wfr = (wxHtmlWindow*)(m_WParser->GetWindow()); + if (wfr) + { + const wxString& src = *m_WParser->GetSource(); + wfr->OnSetTitle(src.Mid(tag.GetBeginPos(), + tag.GetEndPos1()-tag.GetBeginPos())); } } return TRUE; @@ -164,31 +295,23 @@ TAG_HANDLER_BEGIN(BODY, "BODY") TAG_HANDLER_PROC(tag) { - unsigned long tmp; wxColour clr; - if (tag.HasParam("TEXT")) { - if (tag.ScanParam("TEXT", "#%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("LINK")) { - if (tag.ScanParam("LINK", "#%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("BGCOLOR")) { - if (tag.ScanParam("BGCOLOR", "#%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; } @@ -202,20 +325,22 @@ TAG_HANDLER_BEGIN(BLOCKQUOTE, "BLOCKQUOTE") TAG_HANDLER_PROC(tag) { wxHtmlContainerCell *c; - - m_WParser -> CloseContainer(); - c = m_WParser -> OpenContainer(); - if (c -> GetAlignHor() == wxHTML_ALIGN_RIGHT) - c -> SetIndent(5 * m_WParser -> GetCharWidth(), wxHTML_INDENT_RIGHT); + + m_WParser->CloseContainer(); + c = m_WParser->OpenContainer(); + + 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); - m_WParser -> OpenContainer(); + c->SetIndent(5 * m_WParser->GetCharWidth(), wxHTML_INDENT_LEFT); + + c->SetIndent(m_WParser->GetCharHeight(), wxHTML_INDENT_TOP); + m_WParser->OpenContainer(); ParseInner(tag); - c = m_WParser -> CloseContainer(); - c -> SetIndent(m_WParser -> GetCharHeight(), wxHTML_INDENT_BOTTOM); - m_WParser -> CloseContainer(); - m_WParser -> OpenContainer(); + c = m_WParser->CloseContainer(); + c->SetIndent(m_WParser->GetCharHeight(), wxHTML_INDENT_BOTTOM); + m_WParser->CloseContainer(); + m_WParser->OpenContainer(); return TRUE; } @@ -223,6 +348,14 @@ 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_PROC(tag) + { + return true; + } +TAG_HANDLER_END(DoNothing) @@ -235,6 +368,7 @@ TAGS_MODULE_BEGIN(Layout) TAGS_MODULE_ADD(TITLE) TAGS_MODULE_ADD(BODY) TAGS_MODULE_ADD(BLOCKQUOTE) + TAGS_MODULE_ADD(DoNothing) TAGS_MODULE_END(Layout)