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richtexthtml.cpp
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660 lines (535 loc) · 19.9 KB
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/////////////////////////////////////////////////////////////////////////////
// Name: src/richtext/richtexthtml.cpp
// Purpose: HTML I/O for wxRichTextCtrl
// Author: Julian Smart
// Modified by:
// Created: 2005-09-30
// RCS-ID: $Id: richtexthtml.cpp 64162 2010-04-27 16:10:27Z JS $
// Copyright: (c) Julian Smart
// Licence: wxWindows licence
/////////////////////////////////////////////////////////////////////////////
// For compilers that support precompilation, includes "wx.h".
#include "wx/wxprec.h"
#ifdef __BORLANDC__
#pragma hdrstop
#endif
#if wxUSE_RICHTEXT
#include "wx/richtext/richtexthtml.h"
#include "wx/richtext/richtextstyles.h"
#ifndef WX_PRECOMP
#endif
#include "wx/filename.h"
#include "wx/wfstream.h"
#include "wx/txtstrm.h"
#if wxUSE_FILESYSTEM
#include "wx/filesys.h"
#include "wx/fs_mem.h"
#endif
IMPLEMENT_DYNAMIC_CLASS(wxRichTextHTMLHandler, wxRichTextFileHandler)
int wxRichTextHTMLHandler::sm_fileCounter = 1;
wxRichTextHTMLHandler::wxRichTextHTMLHandler(const wxString& name, const wxString& ext, int type)
: wxRichTextFileHandler(name, ext, type), m_buffer(NULL), m_font(false), m_inTable(false)
{
m_fontSizeMapping.Add(8);
m_fontSizeMapping.Add(10);
m_fontSizeMapping.Add(13);
m_fontSizeMapping.Add(17);
m_fontSizeMapping.Add(22);
m_fontSizeMapping.Add(30);
m_fontSizeMapping.Add(100);
}
/// Can we handle this filename (if using files)? By default, checks the extension.
bool wxRichTextHTMLHandler::CanHandle(const wxString& filename) const
{
wxString path, file, ext;
wxSplitPath(filename, & path, & file, & ext);
return (ext.Lower() == wxT("html") || ext.Lower() == wxT("htm"));
}
#if wxUSE_STREAMS
bool wxRichTextHTMLHandler::DoLoadFile(wxRichTextBuffer *WXUNUSED(buffer), wxInputStream& WXUNUSED(stream))
{
return false;
}
/*
* We need to output only _changes_ in character formatting.
*/
bool wxRichTextHTMLHandler::DoSaveFile(wxRichTextBuffer *buffer, wxOutputStream& stream)
{
m_buffer = buffer;
ClearTemporaryImageLocations();
buffer->Defragment();
#if wxUSE_UNICODE
wxCSConv* customEncoding = NULL;
wxMBConv* conv = NULL;
if (!GetEncoding().IsEmpty())
{
customEncoding = new wxCSConv(GetEncoding());
if (!customEncoding->IsOk())
{
delete customEncoding;
customEncoding = NULL;
}
}
if (customEncoding)
conv = customEncoding;
else
conv = & wxConvUTF8;
#endif
{
#if wxUSE_UNICODE
wxTextOutputStream str(stream, wxEOL_NATIVE, *conv);
#else
wxTextOutputStream str(stream, wxEOL_NATIVE);
#endif
wxTextAttrEx currentParaStyle = buffer->GetAttributes();
wxTextAttrEx currentCharStyle = buffer->GetAttributes();
if ((GetFlags() & wxRICHTEXT_HANDLER_NO_HEADER_FOOTER) == 0)
str << wxT("<html><head></head><body>\n");
OutputFont(currentParaStyle, str);
m_font = false;
m_inTable = false;
m_indents.Clear();
m_listTypes.Clear();
wxRichTextObjectList::compatibility_iterator node = buffer->GetChildren().GetFirst();
while (node)
{
wxRichTextParagraph* para = wxDynamicCast(node->GetData(), wxRichTextParagraph);
wxASSERT (para != NULL);
if (para)
{
wxTextAttrEx paraStyle(para->GetCombinedAttributes());
BeginParagraphFormatting(currentParaStyle, paraStyle, str);
wxRichTextObjectList::compatibility_iterator node2 = para->GetChildren().GetFirst();
while (node2)
{
wxRichTextObject* obj = node2->GetData();
wxRichTextPlainText* textObj = wxDynamicCast(obj, wxRichTextPlainText);
if (textObj && !textObj->IsEmpty())
{
wxTextAttrEx charStyle(para->GetCombinedAttributes(obj->GetAttributes()));
BeginCharacterFormatting(currentCharStyle, charStyle, paraStyle, str);
wxString text = textObj->GetText();
if (charStyle.HasTextEffects() && (charStyle.GetTextEffects() & wxTEXT_ATTR_EFFECT_CAPITALS))
text.MakeUpper();
wxString toReplace = wxRichTextLineBreakChar;
text.Replace(toReplace, wxT("<br>"));
str << text;
EndCharacterFormatting(currentCharStyle, charStyle, paraStyle, str);
}
wxRichTextImage* image = wxDynamicCast(obj, wxRichTextImage);
if( image && (!image->IsEmpty() || image->GetImageBlock().GetData()))
WriteImage( image, stream );
node2 = node2->GetNext();
}
EndParagraphFormatting(currentParaStyle, paraStyle, str);
str << wxT("\n");
}
node = node->GetNext();
}
CloseLists(-1, str);
str << wxT("</font>");
if ((GetFlags() & wxRICHTEXT_HANDLER_NO_HEADER_FOOTER) == 0)
str << wxT("</body></html>");
str << wxT("\n");
}
#if wxUSE_UNICODE
if (customEncoding)
delete customEncoding;
#endif
m_buffer = NULL;
return true;
}
void wxRichTextHTMLHandler::BeginCharacterFormatting(const wxTextAttrEx& currentStyle, const wxTextAttrEx& thisStyle, const wxTextAttrEx& WXUNUSED(paraStyle), wxTextOutputStream& str)
{
wxString style;
// Is there any change in the font properties of the item?
if (thisStyle.GetFont().GetFaceName() != currentStyle.GetFont().GetFaceName())
{
wxString faceName(thisStyle.GetFont().GetFaceName());
style += wxString::Format(wxT(" face=\"%s\""), faceName.c_str());
}
if (thisStyle.GetFont().GetPointSize() != currentStyle.GetFont().GetPointSize())
style += wxString::Format(wxT(" size=\"%ld\""), PtToSize(thisStyle.GetFont().GetPointSize()));
if (thisStyle.GetTextColour() != currentStyle.GetTextColour() )
{
wxString color(thisStyle.GetTextColour().GetAsString(wxC2S_HTML_SYNTAX));
style += wxString::Format(wxT(" color=\"%s\""), color.c_str());
}
if (style.size())
{
str << wxString::Format(wxT("<font %s >"), style.c_str());
m_font = true;
}
if (thisStyle.GetFont().GetWeight() == wxBOLD)
str << wxT("<b>");
if (thisStyle.GetFont().GetStyle() == wxITALIC)
str << wxT("<i>");
if (thisStyle.GetFont().GetUnderlined())
str << wxT("<u>");
if (thisStyle.HasURL())
str << wxT("<a href=\"") << thisStyle.GetURL() << wxT("\">");
}
void wxRichTextHTMLHandler::EndCharacterFormatting(const wxTextAttrEx& WXUNUSED(currentStyle), const wxTextAttrEx& thisStyle, const wxTextAttrEx& WXUNUSED(paraStyle), wxTextOutputStream& stream)
{
if (thisStyle.HasURL())
stream << wxT("</a>");
if (thisStyle.GetFont().GetUnderlined())
stream << wxT("</u>");
if (thisStyle.GetFont().GetStyle() == wxITALIC)
stream << wxT("</i>");
if (thisStyle.GetFont().GetWeight() == wxBOLD)
stream << wxT("</b>");
if (m_font)
{
m_font = false;
stream << wxT("</font>");
}
}
/// Begin paragraph formatting
void wxRichTextHTMLHandler::BeginParagraphFormatting(const wxTextAttrEx& WXUNUSED(currentStyle), const wxTextAttrEx& thisStyle, wxTextOutputStream& str)
{
if (thisStyle.HasPageBreak())
{
str << wxT("<div style=\"page-break-after:always\"></div>\n");
}
if (thisStyle.HasLeftIndent() && thisStyle.GetLeftIndent() != 0)
{
if (thisStyle.HasBulletStyle())
{
int indent = thisStyle.GetLeftIndent();
// Close levels high than this
CloseLists(indent, str);
if (m_indents.GetCount() > 0 && indent == m_indents.Last())
{
// Same level, no need to start a new list
}
else if (m_indents.GetCount() == 0 || indent > m_indents.Last())
{
m_indents.Add(indent);
wxString tag;
int listType = TypeOfList(thisStyle, tag);
m_listTypes.Add(listType);
// wxHTML needs an extra <p> before a list when using <p> ... </p> in previous paragraphs.
// TODO: pass a flag that indicates we're using wxHTML.
str << wxT("<p>\n");
str << tag;
}
str << wxT("<li> ");
}
else
{
CloseLists(-1, str);
wxString align = GetAlignment(thisStyle);
str << wxString::Format(wxT("<p align=\"%s\""), align.c_str());
wxString styleStr;
if ((GetFlags() & wxRICHTEXT_HANDLER_USE_CSS) && thisStyle.HasParagraphSpacingBefore())
{
float spacingBeforeMM = thisStyle.GetParagraphSpacingBefore() / 10.0;
styleStr += wxString::Format(wxT("margin-top: %.2fmm; "), spacingBeforeMM);
}
if ((GetFlags() & wxRICHTEXT_HANDLER_USE_CSS) && thisStyle.HasParagraphSpacingAfter())
{
float spacingAfterMM = thisStyle.GetParagraphSpacingAfter() / 10.0;
styleStr += wxString::Format(wxT("margin-bottom: %.2fmm; "), spacingAfterMM);
}
float indentLeftMM = (thisStyle.GetLeftIndent() + thisStyle.GetLeftSubIndent())/10.0;
if ((GetFlags() & wxRICHTEXT_HANDLER_USE_CSS) && (indentLeftMM > 0.0))
{
styleStr += wxString::Format(wxT("margin-left: %.2fmm; "), indentLeftMM);
}
float indentRightMM = thisStyle.GetRightIndent()/10.0;
if ((GetFlags() & wxRICHTEXT_HANDLER_USE_CSS) && thisStyle.HasRightIndent() && (indentRightMM > 0.0))
{
styleStr += wxString::Format(wxT("margin-right: %.2fmm; "), indentRightMM);
}
// First line indentation
float firstLineIndentMM = - thisStyle.GetLeftSubIndent() / 10.0;
if ((GetFlags() & wxRICHTEXT_HANDLER_USE_CSS) && (firstLineIndentMM > 0.0))
{
styleStr += wxString::Format(wxT("text-indent: %.2fmm; "), firstLineIndentMM);
}
if (!styleStr.IsEmpty())
str << wxT(" style=\"") << styleStr << wxT("\"");
str << wxT(">");
// TODO: convert to pixels
int indentPixels = indentLeftMM*10/4;
if ((GetFlags() & wxRICHTEXT_HANDLER_USE_CSS) == 0)
{
// Use a table to do indenting if we don't have CSS
str << wxString::Format(wxT("<table border=0 cellpadding=0 cellspacing=0><tr><td width=\"%d\"></td><td>"), indentPixels);
m_inTable = true;
}
if (((GetFlags() & wxRICHTEXT_HANDLER_USE_CSS) == 0) && (thisStyle.GetLeftSubIndent() < 0))
{
str << SymbolicIndent( - thisStyle.GetLeftSubIndent());
}
}
}
else
{
CloseLists(-1, str);
wxString align = GetAlignment(thisStyle);
str << wxString::Format(wxT("<p align=\"%s\""), align.c_str());
wxString styleStr;
if ((GetFlags() & wxRICHTEXT_HANDLER_USE_CSS) && thisStyle.HasParagraphSpacingBefore())
{
float spacingBeforeMM = thisStyle.GetParagraphSpacingBefore() / 10.0;
styleStr += wxString::Format(wxT("margin-top: %.2fmm; "), spacingBeforeMM);
}
if ((GetFlags() & wxRICHTEXT_HANDLER_USE_CSS) && thisStyle.HasParagraphSpacingAfter())
{
float spacingAfterMM = thisStyle.GetParagraphSpacingAfter() / 10.0;
styleStr += wxString::Format(wxT("margin-bottom: %.2fmm; "), spacingAfterMM);
}
if (!styleStr.IsEmpty())
str << wxT(" style=\"") << styleStr << wxT("\"");
str << wxT(">");
}
OutputFont(thisStyle, str);
}
/// End paragraph formatting
void wxRichTextHTMLHandler::EndParagraphFormatting(const wxTextAttrEx& WXUNUSED(currentStyle), const wxTextAttrEx& thisStyle, wxTextOutputStream& stream)
{
if (thisStyle.HasFont())
stream << wxT("</font>");
if (m_inTable)
{
stream << wxT("</td></tr></table></p>\n");
m_inTable = false;
}
else if (!thisStyle.HasBulletStyle())
stream << wxT("</p>\n");
}
/// Closes lists to level (-1 means close all)
void wxRichTextHTMLHandler::CloseLists(int level, wxTextOutputStream& str)
{
// Close levels high than this
int i = m_indents.GetCount()-1;
while (i >= 0)
{
int l = m_indents[i];
if (l > level)
{
if (m_listTypes[i] == 0)
str << wxT("</ol>");
else
str << wxT("</ul>");
m_indents.RemoveAt(i);
m_listTypes.RemoveAt(i);
}
else
break;
i --;
}
}
/// Output font tag
void wxRichTextHTMLHandler::OutputFont(const wxTextAttrEx& style, wxTextOutputStream& stream)
{
if (style.HasFont())
{
stream << wxString::Format(wxT("<font face=\"%s\" size=\"%ld\""), style.GetFont().GetFaceName().c_str(), PtToSize(style.GetFont().GetPointSize()));
if (style.HasTextColour())
stream << wxString::Format(wxT(" color=\"%s\""), style.GetTextColour().GetAsString(wxC2S_HTML_SYNTAX).c_str());
stream << wxT(" >");
}
}
int wxRichTextHTMLHandler::TypeOfList( const wxTextAttrEx& thisStyle, wxString& tag )
{
// We can use number attribute of li tag but not all the browsers support it.
// also wxHtmlWindow doesn't support type attribute.
bool m_is_ul = false;
if (thisStyle.GetBulletStyle() == (wxTEXT_ATTR_BULLET_STYLE_ARABIC|wxTEXT_ATTR_BULLET_STYLE_PERIOD))
tag = wxT("<ol type=\"1\">");
else if (thisStyle.GetBulletStyle() == wxTEXT_ATTR_BULLET_STYLE_LETTERS_UPPER)
tag = wxT("<ol type=\"A\">");
else if (thisStyle.GetBulletStyle() == wxTEXT_ATTR_BULLET_STYLE_LETTERS_LOWER)
tag = wxT("<ol type=\"a\">");
else if (thisStyle.GetBulletStyle() == wxTEXT_ATTR_BULLET_STYLE_ROMAN_UPPER)
tag = wxT("<ol type=\"I\">");
else if (thisStyle.GetBulletStyle() == wxTEXT_ATTR_BULLET_STYLE_ROMAN_LOWER)
tag = wxT("<ol type=\"i\">");
else
{
tag = wxT("<ul>");
m_is_ul = true;
}
if (m_is_ul)
return 1;
else
return 0;
}
wxString wxRichTextHTMLHandler::GetAlignment( const wxTextAttrEx& thisStyle )
{
switch( thisStyle.GetAlignment() )
{
case wxTEXT_ALIGNMENT_LEFT:
return wxT("left");
case wxTEXT_ALIGNMENT_RIGHT:
return wxT("right");
case wxTEXT_ALIGNMENT_CENTER:
return wxT("center");
case wxTEXT_ALIGNMENT_JUSTIFIED:
return wxT("justify");
default:
return wxT("left");
}
}
void wxRichTextHTMLHandler::WriteImage(wxRichTextImage* image, wxOutputStream& stream)
{
wxTextOutputStream str(stream);
str << wxT("<img src=\"");
#if wxUSE_FILESYSTEM
if (GetFlags() & wxRICHTEXT_HANDLER_SAVE_IMAGES_TO_MEMORY)
{
if (!image->GetImage().Ok() && image->GetImageBlock().GetData())
image->LoadFromBlock();
if (image->GetImage().Ok() && !image->GetImageBlock().GetData())
image->MakeBlock();
if (image->GetImage().Ok())
{
wxString ext(image->GetImageBlock().GetExtension());
wxString tempFilename(wxString::Format(wxT("image%d.%s"), sm_fileCounter, (const wxChar*) ext));
wxMemoryFSHandler::AddFile(tempFilename, image->GetImage(), image->GetImageBlock().GetImageType());
m_imageLocations.Add(tempFilename);
str << wxT("memory:") << tempFilename;
}
else
str << wxT("memory:?");
sm_fileCounter ++;
}
else if (GetFlags() & wxRICHTEXT_HANDLER_SAVE_IMAGES_TO_FILES)
{
if (!image->GetImage().Ok() && image->GetImageBlock().GetData())
image->LoadFromBlock();
if (image->GetImage().Ok() && !image->GetImageBlock().GetData())
image->MakeBlock();
if (image->GetImage().Ok())
{
wxString tempDir(GetTempDir());
if (tempDir.IsEmpty())
tempDir = wxFileName::GetTempDir();
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