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660 lines
20 KiB
C++
660 lines
20 KiB
C++
/////////////////////////////////////////////////////////////////////////////
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// Name: src/richtext/richtexthtml.cpp
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// Purpose: HTML I/O for wxRichTextCtrl
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// Author: Julian Smart
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// Modified by:
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// Created: 2005-09-30
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// RCS-ID: $Id: richtexthtml.cpp 64162 2010-04-27 16:10:27Z JS $
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// Copyright: (c) Julian Smart
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// Licence: wxWindows licence
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/////////////////////////////////////////////////////////////////////////////
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// For compilers that support precompilation, includes "wx.h".
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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_RICHTEXT
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#include "wx/richtext/richtexthtml.h"
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#include "wx/richtext/richtextstyles.h"
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#ifndef WX_PRECOMP
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#endif
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#include "wx/filename.h"
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#include "wx/wfstream.h"
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#include "wx/txtstrm.h"
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#if wxUSE_FILESYSTEM
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#include "wx/filesys.h"
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#include "wx/fs_mem.h"
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#endif
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IMPLEMENT_DYNAMIC_CLASS(wxRichTextHTMLHandler, wxRichTextFileHandler)
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int wxRichTextHTMLHandler::sm_fileCounter = 1;
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wxRichTextHTMLHandler::wxRichTextHTMLHandler(const wxString& name, const wxString& ext, int type)
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: wxRichTextFileHandler(name, ext, type), m_buffer(NULL), m_font(false), m_inTable(false)
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{
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m_fontSizeMapping.Add(8);
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m_fontSizeMapping.Add(10);
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m_fontSizeMapping.Add(13);
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m_fontSizeMapping.Add(17);
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m_fontSizeMapping.Add(22);
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m_fontSizeMapping.Add(30);
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m_fontSizeMapping.Add(100);
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}
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/// Can we handle this filename (if using files)? By default, checks the extension.
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bool wxRichTextHTMLHandler::CanHandle(const wxString& filename) const
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{
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wxString path, file, ext;
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wxSplitPath(filename, & path, & file, & ext);
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return (ext.Lower() == wxT("html") || ext.Lower() == wxT("htm"));
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}
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#if wxUSE_STREAMS
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bool wxRichTextHTMLHandler::DoLoadFile(wxRichTextBuffer *WXUNUSED(buffer), wxInputStream& WXUNUSED(stream))
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{
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return false;
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}
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/*
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* We need to output only _changes_ in character formatting.
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*/
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bool wxRichTextHTMLHandler::DoSaveFile(wxRichTextBuffer *buffer, wxOutputStream& stream)
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{
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m_buffer = buffer;
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ClearTemporaryImageLocations();
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buffer->Defragment();
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#if wxUSE_UNICODE
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wxCSConv* customEncoding = NULL;
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wxMBConv* conv = NULL;
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if (!GetEncoding().IsEmpty())
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{
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customEncoding = new wxCSConv(GetEncoding());
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if (!customEncoding->IsOk())
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{
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delete customEncoding;
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customEncoding = NULL;
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}
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}
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if (customEncoding)
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conv = customEncoding;
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else
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conv = & wxConvUTF8;
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#endif
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{
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#if wxUSE_UNICODE
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wxTextOutputStream str(stream, wxEOL_NATIVE, *conv);
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#else
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wxTextOutputStream str(stream, wxEOL_NATIVE);
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#endif
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wxTextAttrEx currentParaStyle = buffer->GetAttributes();
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wxTextAttrEx currentCharStyle = buffer->GetAttributes();
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if ((GetFlags() & wxRICHTEXT_HANDLER_NO_HEADER_FOOTER) == 0)
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str << wxT("<html><head></head><body>\n");
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OutputFont(currentParaStyle, str);
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m_font = false;
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m_inTable = false;
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m_indents.Clear();
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m_listTypes.Clear();
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wxRichTextObjectList::compatibility_iterator node = buffer->GetChildren().GetFirst();
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while (node)
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{
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wxRichTextParagraph* para = wxDynamicCast(node->GetData(), wxRichTextParagraph);
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wxASSERT (para != NULL);
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if (para)
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{
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wxTextAttrEx paraStyle(para->GetCombinedAttributes());
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BeginParagraphFormatting(currentParaStyle, paraStyle, str);
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wxRichTextObjectList::compatibility_iterator node2 = para->GetChildren().GetFirst();
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while (node2)
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{
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wxRichTextObject* obj = node2->GetData();
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wxRichTextPlainText* textObj = wxDynamicCast(obj, wxRichTextPlainText);
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if (textObj && !textObj->IsEmpty())
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{
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wxTextAttrEx charStyle(para->GetCombinedAttributes(obj->GetAttributes()));
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BeginCharacterFormatting(currentCharStyle, charStyle, paraStyle, str);
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wxString text = textObj->GetText();
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if (charStyle.HasTextEffects() && (charStyle.GetTextEffects() & wxTEXT_ATTR_EFFECT_CAPITALS))
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text.MakeUpper();
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wxString toReplace = wxRichTextLineBreakChar;
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text.Replace(toReplace, wxT("<br>"));
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str << text;
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EndCharacterFormatting(currentCharStyle, charStyle, paraStyle, str);
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}
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wxRichTextImage* image = wxDynamicCast(obj, wxRichTextImage);
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if( image && (!image->IsEmpty() || image->GetImageBlock().GetData()))
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WriteImage( image, stream );
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node2 = node2->GetNext();
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}
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EndParagraphFormatting(currentParaStyle, paraStyle, str);
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str << wxT("\n");
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}
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node = node->GetNext();
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}
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CloseLists(-1, str);
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str << wxT("</font>");
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if ((GetFlags() & wxRICHTEXT_HANDLER_NO_HEADER_FOOTER) == 0)
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str << wxT("</body></html>");
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str << wxT("\n");
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}
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#if wxUSE_UNICODE
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if (customEncoding)
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delete customEncoding;
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#endif
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m_buffer = NULL;
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return true;
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}
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void wxRichTextHTMLHandler::BeginCharacterFormatting(const wxTextAttrEx& currentStyle, const wxTextAttrEx& thisStyle, const wxTextAttrEx& WXUNUSED(paraStyle), wxTextOutputStream& str)
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{
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wxString style;
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// Is there any change in the font properties of the item?
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if (thisStyle.GetFont().GetFaceName() != currentStyle.GetFont().GetFaceName())
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{
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wxString faceName(thisStyle.GetFont().GetFaceName());
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style += wxString::Format(wxT(" face=\"%s\""), faceName.c_str());
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}
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if (thisStyle.GetFont().GetPointSize() != currentStyle.GetFont().GetPointSize())
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style += wxString::Format(wxT(" size=\"%ld\""), PtToSize(thisStyle.GetFont().GetPointSize()));
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if (thisStyle.GetTextColour() != currentStyle.GetTextColour() )
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{
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wxString color(thisStyle.GetTextColour().GetAsString(wxC2S_HTML_SYNTAX));
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style += wxString::Format(wxT(" color=\"%s\""), color.c_str());
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}
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if (style.size())
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{
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str << wxString::Format(wxT("<font %s >"), style.c_str());
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m_font = true;
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}
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if (thisStyle.GetFont().GetWeight() == wxBOLD)
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str << wxT("<b>");
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if (thisStyle.GetFont().GetStyle() == wxITALIC)
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str << wxT("<i>");
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if (thisStyle.GetFont().GetUnderlined())
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str << wxT("<u>");
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if (thisStyle.HasURL())
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str << wxT("<a href=\"") << thisStyle.GetURL() << wxT("\">");
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}
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void wxRichTextHTMLHandler::EndCharacterFormatting(const wxTextAttrEx& WXUNUSED(currentStyle), const wxTextAttrEx& thisStyle, const wxTextAttrEx& WXUNUSED(paraStyle), wxTextOutputStream& stream)
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{
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if (thisStyle.HasURL())
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stream << wxT("</a>");
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if (thisStyle.GetFont().GetUnderlined())
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stream << wxT("</u>");
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if (thisStyle.GetFont().GetStyle() == wxITALIC)
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stream << wxT("</i>");
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if (thisStyle.GetFont().GetWeight() == wxBOLD)
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stream << wxT("</b>");
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if (m_font)
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{
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m_font = false;
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stream << wxT("</font>");
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}
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}
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/// Begin paragraph formatting
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void wxRichTextHTMLHandler::BeginParagraphFormatting(const wxTextAttrEx& WXUNUSED(currentStyle), const wxTextAttrEx& thisStyle, wxTextOutputStream& str)
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{
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if (thisStyle.HasPageBreak())
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{
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str << wxT("<div style=\"page-break-after:always\"></div>\n");
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}
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if (thisStyle.HasLeftIndent() && thisStyle.GetLeftIndent() != 0)
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{
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if (thisStyle.HasBulletStyle())
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{
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int indent = thisStyle.GetLeftIndent();
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// Close levels high than this
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CloseLists(indent, str);
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if (m_indents.GetCount() > 0 && indent == m_indents.Last())
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{
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// Same level, no need to start a new list
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}
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else if (m_indents.GetCount() == 0 || indent > m_indents.Last())
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{
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m_indents.Add(indent);
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wxString tag;
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int listType = TypeOfList(thisStyle, tag);
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m_listTypes.Add(listType);
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// wxHTML needs an extra <p> before a list when using <p> ... </p> in previous paragraphs.
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// TODO: pass a flag that indicates we're using wxHTML.
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str << wxT("<p>\n");
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str << tag;
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}
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str << wxT("<li> ");
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}
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else
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{
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CloseLists(-1, str);
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wxString align = GetAlignment(thisStyle);
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str << wxString::Format(wxT("<p align=\"%s\""), align.c_str());
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wxString styleStr;
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if ((GetFlags() & wxRICHTEXT_HANDLER_USE_CSS) && thisStyle.HasParagraphSpacingBefore())
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{
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float spacingBeforeMM = thisStyle.GetParagraphSpacingBefore() / 10.0;
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styleStr += wxString::Format(wxT("margin-top: %.2fmm; "), spacingBeforeMM);
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}
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if ((GetFlags() & wxRICHTEXT_HANDLER_USE_CSS) && thisStyle.HasParagraphSpacingAfter())
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{
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float spacingAfterMM = thisStyle.GetParagraphSpacingAfter() / 10.0;
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styleStr += wxString::Format(wxT("margin-bottom: %.2fmm; "), spacingAfterMM);
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}
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float indentLeftMM = (thisStyle.GetLeftIndent() + thisStyle.GetLeftSubIndent())/10.0;
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if ((GetFlags() & wxRICHTEXT_HANDLER_USE_CSS) && (indentLeftMM > 0.0))
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{
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styleStr += wxString::Format(wxT("margin-left: %.2fmm; "), indentLeftMM);
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}
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float indentRightMM = thisStyle.GetRightIndent()/10.0;
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if ((GetFlags() & wxRICHTEXT_HANDLER_USE_CSS) && thisStyle.HasRightIndent() && (indentRightMM > 0.0))
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{
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styleStr += wxString::Format(wxT("margin-right: %.2fmm; "), indentRightMM);
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}
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// First line indentation
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float firstLineIndentMM = - thisStyle.GetLeftSubIndent() / 10.0;
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if ((GetFlags() & wxRICHTEXT_HANDLER_USE_CSS) && (firstLineIndentMM > 0.0))
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{
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styleStr += wxString::Format(wxT("text-indent: %.2fmm; "), firstLineIndentMM);
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}
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if (!styleStr.IsEmpty())
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str << wxT(" style=\"") << styleStr << wxT("\"");
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str << wxT(">");
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// TODO: convert to pixels
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int indentPixels = indentLeftMM*10/4;
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if ((GetFlags() & wxRICHTEXT_HANDLER_USE_CSS) == 0)
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{
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// Use a table to do indenting if we don't have CSS
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str << wxString::Format(wxT("<table border=0 cellpadding=0 cellspacing=0><tr><td width=\"%d\"></td><td>"), indentPixels);
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m_inTable = true;
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}
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if (((GetFlags() & wxRICHTEXT_HANDLER_USE_CSS) == 0) && (thisStyle.GetLeftSubIndent() < 0))
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{
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str << SymbolicIndent( - thisStyle.GetLeftSubIndent());
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}
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}
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}
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else
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{
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CloseLists(-1, str);
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wxString align = GetAlignment(thisStyle);
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str << wxString::Format(wxT("<p align=\"%s\""), align.c_str());
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wxString styleStr;
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if ((GetFlags() & wxRICHTEXT_HANDLER_USE_CSS) && thisStyle.HasParagraphSpacingBefore())
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{
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float spacingBeforeMM = thisStyle.GetParagraphSpacingBefore() / 10.0;
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styleStr += wxString::Format(wxT("margin-top: %.2fmm; "), spacingBeforeMM);
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}
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if ((GetFlags() & wxRICHTEXT_HANDLER_USE_CSS) && thisStyle.HasParagraphSpacingAfter())
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{
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float spacingAfterMM = thisStyle.GetParagraphSpacingAfter() / 10.0;
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styleStr += wxString::Format(wxT("margin-bottom: %.2fmm; "), spacingAfterMM);
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}
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if (!styleStr.IsEmpty())
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str << wxT(" style=\"") << styleStr << wxT("\"");
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str << wxT(">");
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}
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OutputFont(thisStyle, str);
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}
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/// End paragraph formatting
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void wxRichTextHTMLHandler::EndParagraphFormatting(const wxTextAttrEx& WXUNUSED(currentStyle), const wxTextAttrEx& thisStyle, wxTextOutputStream& stream)
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{
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if (thisStyle.HasFont())
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stream << wxT("</font>");
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if (m_inTable)
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{
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stream << wxT("</td></tr></table></p>\n");
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m_inTable = false;
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}
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else if (!thisStyle.HasBulletStyle())
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stream << wxT("</p>\n");
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}
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/// Closes lists to level (-1 means close all)
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void wxRichTextHTMLHandler::CloseLists(int level, wxTextOutputStream& str)
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{
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// Close levels high than this
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int i = m_indents.GetCount()-1;
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while (i >= 0)
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{
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int l = m_indents[i];
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if (l > level)
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{
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if (m_listTypes[i] == 0)
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str << wxT("</ol>");
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else
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str << wxT("</ul>");
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m_indents.RemoveAt(i);
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m_listTypes.RemoveAt(i);
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}
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else
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break;
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i --;
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}
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}
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/// Output font tag
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void wxRichTextHTMLHandler::OutputFont(const wxTextAttrEx& style, wxTextOutputStream& stream)
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{
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if (style.HasFont())
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{
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stream << wxString::Format(wxT("<font face=\"%s\" size=\"%ld\""), style.GetFont().GetFaceName().c_str(), PtToSize(style.GetFont().GetPointSize()));
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if (style.HasTextColour())
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stream << wxString::Format(wxT(" color=\"%s\""), style.GetTextColour().GetAsString(wxC2S_HTML_SYNTAX).c_str());
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stream << wxT(" >");
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}
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}
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int wxRichTextHTMLHandler::TypeOfList( const wxTextAttrEx& thisStyle, wxString& tag )
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{
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// We can use number attribute of li tag but not all the browsers support it.
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// also wxHtmlWindow doesn't support type attribute.
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bool m_is_ul = false;
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if (thisStyle.GetBulletStyle() == (wxTEXT_ATTR_BULLET_STYLE_ARABIC|wxTEXT_ATTR_BULLET_STYLE_PERIOD))
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tag = wxT("<ol type=\"1\">");
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else if (thisStyle.GetBulletStyle() == wxTEXT_ATTR_BULLET_STYLE_LETTERS_UPPER)
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tag = wxT("<ol type=\"A\">");
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else if (thisStyle.GetBulletStyle() == wxTEXT_ATTR_BULLET_STYLE_LETTERS_LOWER)
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tag = wxT("<ol type=\"a\">");
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else if (thisStyle.GetBulletStyle() == wxTEXT_ATTR_BULLET_STYLE_ROMAN_UPPER)
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tag = wxT("<ol type=\"I\">");
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else if (thisStyle.GetBulletStyle() == wxTEXT_ATTR_BULLET_STYLE_ROMAN_LOWER)
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tag = wxT("<ol type=\"i\">");
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else
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{
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tag = wxT("<ul>");
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m_is_ul = true;
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}
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if (m_is_ul)
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return 1;
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else
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return 0;
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}
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wxString wxRichTextHTMLHandler::GetAlignment( const wxTextAttrEx& thisStyle )
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{
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switch( thisStyle.GetAlignment() )
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{
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case wxTEXT_ALIGNMENT_LEFT:
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return wxT("left");
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case wxTEXT_ALIGNMENT_RIGHT:
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return wxT("right");
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case wxTEXT_ALIGNMENT_CENTER:
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return wxT("center");
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case wxTEXT_ALIGNMENT_JUSTIFIED:
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return wxT("justify");
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default:
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return wxT("left");
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}
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}
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void wxRichTextHTMLHandler::WriteImage(wxRichTextImage* image, wxOutputStream& stream)
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{
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wxTextOutputStream str(stream);
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str << wxT("<img src=\"");
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#if wxUSE_FILESYSTEM
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if (GetFlags() & wxRICHTEXT_HANDLER_SAVE_IMAGES_TO_MEMORY)
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{
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if (!image->GetImage().Ok() && image->GetImageBlock().GetData())
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image->LoadFromBlock();
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if (image->GetImage().Ok() && !image->GetImageBlock().GetData())
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image->MakeBlock();
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if (image->GetImage().Ok())
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{
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wxString ext(image->GetImageBlock().GetExtension());
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wxString tempFilename(wxString::Format(wxT("image%d.%s"), sm_fileCounter, (const wxChar*) ext));
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wxMemoryFSHandler::AddFile(tempFilename, image->GetImage(), image->GetImageBlock().GetImageType());
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m_imageLocations.Add(tempFilename);
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str << wxT("memory:") << tempFilename;
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}
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else
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str << wxT("memory:?");
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sm_fileCounter ++;
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}
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else if (GetFlags() & wxRICHTEXT_HANDLER_SAVE_IMAGES_TO_FILES)
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{
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if (!image->GetImage().Ok() && image->GetImageBlock().GetData())
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image->LoadFromBlock();
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if (image->GetImage().Ok() && !image->GetImageBlock().GetData())
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image->MakeBlock();
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if (image->GetImage().Ok())
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{
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wxString tempDir(GetTempDir());
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if (tempDir.IsEmpty())
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tempDir = wxFileName::GetTempDir();
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wxString ext(image->GetImageBlock().GetExtension());
|
|
wxString tempFilename(wxString::Format(wxT("%s/image%d.%s"), (const wxChar*) tempDir, sm_fileCounter, (const wxChar*) ext));
|
|
image->GetImageBlock().Write(tempFilename);
|
|
|
|
m_imageLocations.Add(tempFilename);
|
|
|
|
str << wxFileSystem::FileNameToURL(tempFilename);
|
|
}
|
|
else
|
|
str << wxT("file:?");
|
|
|
|
sm_fileCounter ++;
|
|
}
|
|
else // if (GetFlags() & wxRICHTEXT_HANDLER_SAVE_IMAGES_TO_BASE64) // this is implied
|
|
#endif
|
|
{
|
|
str << wxT("data:");
|
|
str << GetMimeType(image->GetImageBlock().GetImageType());
|
|
str << wxT(";base64,");
|
|
|
|
if (image->GetImage().Ok() && !image->GetImageBlock().GetData())
|
|
image->MakeBlock();
|
|
|
|
wxChar* data = b64enc( image->GetImageBlock().GetData(), image->GetImageBlock().GetDataSize() );
|
|
str << data;
|
|
|
|
delete[] data;
|
|
}
|
|
|
|
str << wxT("\" />");
|
|
}
|
|
|
|
long wxRichTextHTMLHandler::PtToSize(long size)
|
|
{
|
|
int i;
|
|
int len = m_fontSizeMapping.GetCount();
|
|
for (i = 0; i < len; i++)
|
|
if (size <= m_fontSizeMapping[i])
|
|
return i+1;
|
|
return 7;
|
|
}
|
|
|
|
wxString wxRichTextHTMLHandler::SymbolicIndent(long indent)
|
|
{
|
|
wxString in;
|
|
for(;indent > 0; indent -= 20)
|
|
in.Append( wxT(" ") );
|
|
return in;
|
|
}
|
|
|
|
const wxChar* wxRichTextHTMLHandler::GetMimeType(int imageType)
|
|
{
|
|
switch(imageType)
|
|
{
|
|
case wxBITMAP_TYPE_BMP:
|
|
return wxT("image/bmp");
|
|
case wxBITMAP_TYPE_TIF:
|
|
return wxT("image/tiff");
|
|
case wxBITMAP_TYPE_GIF:
|
|
return wxT("image/gif");
|
|
case wxBITMAP_TYPE_PNG:
|
|
return wxT("image/png");
|
|
case wxBITMAP_TYPE_JPEG:
|
|
return wxT("image/jpeg");
|
|
default:
|
|
return wxT("image/unknown");
|
|
}
|
|
}
|
|
|
|
// exim-style base64 encoder
|
|
wxChar* wxRichTextHTMLHandler::b64enc( unsigned char* input, size_t in_len )
|
|
{
|
|
// elements of enc64 array must be 8 bit values
|
|
// otherwise encoder will fail
|
|
// hmmm.. Does wxT macro define a char as 16 bit value
|
|
// when compiling with UNICODE option?
|
|
static const wxChar enc64[] = wxT("ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/");
|
|
wxChar* output = new wxChar[4*((in_len+2)/3)+1];
|
|
wxChar* p = output;
|
|
|
|
while( in_len-- > 0 )
|
|
{
|
|
register wxChar a, b;
|
|
|
|
a = *input++;
|
|
|
|
*p++ = enc64[ (a >> 2) & 0x3f ];
|
|
|
|
if( in_len-- == 0 )
|
|
{
|
|
*p++ = enc64[ (a << 4 ) & 0x30 ];
|
|
*p++ = '=';
|
|
*p++ = '=';
|
|
break;
|
|
}
|
|
|
|
b = *input++;
|
|
|
|
*p++ = enc64[(( a << 4 ) | ((b >> 4) &0xf )) & 0x3f];
|
|
|
|
if( in_len-- == 0 )
|
|
{
|
|
*p++ = enc64[ (b << 2) & 0x3f ];
|
|
*p++ = '=';
|
|
break;
|
|
}
|
|
|
|
a = *input++;
|
|
|
|
*p++ = enc64[ ((( b << 2 ) & 0x3f ) | ((a >> 6)& 0x3)) & 0x3f ];
|
|
|
|
*p++ = enc64[ a & 0x3f ];
|
|
}
|
|
*p = 0;
|
|
|
|
return output;
|
|
}
|
|
#endif
|
|
// wxUSE_STREAMS
|
|
|
|
/// Delete the in-memory or temporary files generated by the last operation
|
|
bool wxRichTextHTMLHandler::DeleteTemporaryImages()
|
|
{
|
|
return DeleteTemporaryImages(GetFlags(), m_imageLocations);
|
|
}
|
|
|
|
/// Delete the in-memory or temporary files generated by the last operation
|
|
bool wxRichTextHTMLHandler::DeleteTemporaryImages(int flags, const wxArrayString& imageLocations)
|
|
{
|
|
size_t i;
|
|
for (i = 0; i < imageLocations.GetCount(); i++)
|
|
{
|
|
wxString location = imageLocations[i];
|
|
|
|
if (flags & wxRICHTEXT_HANDLER_SAVE_IMAGES_TO_MEMORY)
|
|
{
|
|
#if wxUSE_FILESYSTEM
|
|
wxMemoryFSHandler::RemoveFile(location);
|
|
#endif
|
|
}
|
|
else if (flags & wxRICHTEXT_HANDLER_SAVE_IMAGES_TO_FILES)
|
|
{
|
|
if (wxFileExists(location))
|
|
wxRemoveFile(location);
|
|
}
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
|
|
#endif
|
|
// wxUSE_RICHTEXT
|
|
|