935693c484
wxCharBuffer already initializes the last byte of the buffer it allocates to 0 so there is no need to do it explicitly. Also don't allocate an extra byte, wxCharBuffer already adds one to the length passed to it for the trailing NUL. See #13885. git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@73141 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
207 lines
5.2 KiB
C++
207 lines
5.2 KiB
C++
/////////////////////////////////////////////////////////////////////////////
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// Name: src/html/htmlfilt.cpp
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// Purpose: wxHtmlFilter - input filter for translating into HTML format
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// Author: Vaclav Slavik
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// RCS-ID: $Id$
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// Copyright: (c) 1999 Vaclav Slavik
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// Licence: wxWindows licence
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/////////////////////////////////////////////////////////////////////////////
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#include "wx/wxprec.h"
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#ifdef __BORLANDC__
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#pragma hdrstop
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#endif
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#if wxUSE_HTML && wxUSE_STREAMS
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#ifndef WX_PRECOMP
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#include "wx/log.h"
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#include "wx/intl.h"
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#endif
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#include "wx/strconv.h"
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#include "wx/sstream.h"
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#include "wx/html/htmlfilt.h"
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#include "wx/html/htmlwin.h"
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// utility function: read entire contents of an wxInputStream into a wxString
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//
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// TODO: error handling?
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static void ReadString(wxString& str, wxInputStream* s, wxMBConv& conv)
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{
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wxStringOutputStream out(&str, conv);
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s->Read(out);
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}
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/*
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There is code for several default filters:
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*/
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IMPLEMENT_ABSTRACT_CLASS(wxHtmlFilter, wxObject)
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//--------------------------------------------------------------------------------
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// wxHtmlFilterPlainText
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// filter for text/plain or uknown
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//--------------------------------------------------------------------------------
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IMPLEMENT_DYNAMIC_CLASS(wxHtmlFilterPlainText, wxHtmlFilter)
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bool wxHtmlFilterPlainText::CanRead(const wxFSFile& WXUNUSED(file)) const
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{
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return true;
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}
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wxString wxHtmlFilterPlainText::ReadFile(const wxFSFile& file) const
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{
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wxInputStream *s = file.GetStream();
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wxString doc, doc2;
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if (s == NULL) return wxEmptyString;
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ReadString(doc, s, wxConvISO8859_1);
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doc.Replace(wxT("&"), wxT("&"), true);
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doc.Replace(wxT("<"), wxT("<"), true);
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doc.Replace(wxT(">"), wxT(">"), true);
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doc2 = wxT("<HTML><BODY><PRE>\n") + doc + wxT("\n</PRE></BODY></HTML>");
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return doc2;
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}
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//--------------------------------------------------------------------------------
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// wxHtmlFilterImage
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// filter for image/*
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//--------------------------------------------------------------------------------
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class wxHtmlFilterImage : public wxHtmlFilter
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{
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DECLARE_DYNAMIC_CLASS(wxHtmlFilterImage)
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public:
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virtual bool CanRead(const wxFSFile& file) const;
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virtual wxString ReadFile(const wxFSFile& file) const;
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};
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IMPLEMENT_DYNAMIC_CLASS(wxHtmlFilterImage, wxHtmlFilter)
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bool wxHtmlFilterImage::CanRead(const wxFSFile& file) const
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{
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return (file.GetMimeType().Left(6) == wxT("image/"));
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}
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wxString wxHtmlFilterImage::ReadFile(const wxFSFile& file) const
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{
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wxString res = wxT("<HTML><BODY><IMG SRC=\"") + file.GetLocation() + wxT("\"></BODY></HTML>");
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return res;
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}
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//--------------------------------------------------------------------------------
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// wxHtmlFilterHTML
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// filter for text/html
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//--------------------------------------------------------------------------------
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IMPLEMENT_DYNAMIC_CLASS(wxHtmlFilterHTML, wxHtmlFilter)
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bool wxHtmlFilterHTML::CanRead(const wxFSFile& file) const
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{
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// return (file.GetMimeType() == "text/html");
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// This is true in most case but some page can return:
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// "text/html; char-encoding=...."
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// So we use Find instead
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return (file.GetMimeType().Find(wxT("text/html")) == 0);
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}
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wxString wxHtmlFilterHTML::ReadFile(const wxFSFile& file) const
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{
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wxInputStream *s = file.GetStream();
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wxString doc;
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if (s == NULL)
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{
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wxLogError(_("Cannot open HTML document: %s"), file.GetLocation().c_str());
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return wxEmptyString;
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}
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// NB: We convert input file to wchar_t here in Unicode mode, based on
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// either Content-Type header or <meta> tags. In ANSI mode, we don't
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// do it as it is done by wxHtmlParser (for this reason, we add <meta>
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// tag if we used Content-Type header).
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#if wxUSE_UNICODE
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int charsetPos;
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if ((charsetPos = file.GetMimeType().Find(wxT("; charset="))) != wxNOT_FOUND)
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{
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wxString charset = file.GetMimeType().Mid(charsetPos + 10);
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wxCSConv conv(charset);
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ReadString(doc, s, conv);
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}
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else
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{
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size_t size = s->GetSize();
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wxCharBuffer buf( size );
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s->Read( buf.data(), size );
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wxString tmpdoc( buf, wxConvISO8859_1);
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wxString charset = wxHtmlParser::ExtractCharsetInformation(tmpdoc);
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if (charset.empty())
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doc = tmpdoc;
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else
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{
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wxCSConv conv(charset);
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doc = wxString( buf, conv );
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}
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}
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#else // !wxUSE_UNICODE
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ReadString(doc, s, wxConvLibc);
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// add meta tag if we obtained this through http:
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if (!file.GetMimeType().empty())
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{
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wxString hdr;
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wxString mime = file.GetMimeType();
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hdr.Printf(wxT("<meta http-equiv=\"Content-Type\" content=\"%s\">"), mime.c_str());
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return hdr+doc;
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}
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#endif
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return doc;
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}
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///// Module:
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class wxHtmlFilterModule : public wxModule
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{
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DECLARE_DYNAMIC_CLASS(wxHtmlFilterModule)
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public:
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virtual bool OnInit()
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{
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wxHtmlWindow::AddFilter(new wxHtmlFilterHTML);
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wxHtmlWindow::AddFilter(new wxHtmlFilterImage);
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return true;
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}
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virtual void OnExit() {}
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};
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IMPLEMENT_DYNAMIC_CLASS(wxHtmlFilterModule, wxModule)
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#endif
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