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Added conversion to HTML, by Akin Demirtug

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git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@37853 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
This commit is contained in:
Julian Smart
2006-03-07 14:48:17 +00:00
parent b28a6678e0
commit 2dec67617f
2 changed files with 540 additions and 80 deletions
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60
include/wx/richtext/richtexthtml.h
View File

@@ -39,17 +39,65 @@ public:
/// Can we handle this filename (if using files)? By default, checks the extension. /// Can we handle this filename (if using files)? By default, checks the extension.
virtual bool CanHandle(const wxString& filename) const; virtual bool CanHandle(const wxString& filename) const;
/// Output character formatting
virtual void OutputCharacterFormatting(const wxTextAttrEx& currentStyle, const wxTextAttrEx& thisStyle, wxOutputStream& stream, bool start);
/// Output paragraph formatting
virtual void OutputParagraphFormatting(const wxTextAttrEx& currentStyle, const wxTextAttrEx& thisStyle, wxOutputStream& stream, bool start);
protected: protected:
#if wxUSE_STREAMS #if wxUSE_STREAMS
virtual bool DoLoadFile(wxRichTextBuffer *buffer, wxInputStream& stream); virtual bool DoLoadFile(wxRichTextBuffer *buffer, wxInputStream& stream);
virtual bool DoSaveFile(wxRichTextBuffer *buffer, wxOutputStream& stream); virtual bool DoSaveFile(wxRichTextBuffer *buffer, wxOutputStream& stream);
#endif #endif
/// Output character formatting
virtual void BeginCharacterFormatting(const wxTextAttrEx& currentStyle, const wxTextAttrEx& thisStyle, wxOutputStream& stream );
virtual void EndCharacterFormatting(const wxTextAttrEx& WXUNUSED(currentStyle), const wxTextAttrEx& thisStyle, wxOutputStream& stream );
/// Output paragraph formatting
virtual void OutputParagraphFormatting(const wxTextAttrEx& WXUNUSED(currentStyle), const wxTextAttrEx& thisStyle, wxOutputStream& stream/*, bool start*/);
/// Converts an image to its base64 equivalent
void Image_to_Base64(wxRichTextImage* image, wxOutputStream& stream);
/// Builds required indentation
void Indent( const wxTextAttrEx& thisStyle, wxTextOutputStream& str );
/// Left indent
void LIndent( const wxTextAttrEx& thisStyle, wxTextOutputStream& str );
/// Converts from pt to size property compatible height
long Pt_To_Size(long size);
/// Typical base64 encoder
wxChar* b64enc( unsigned char* input, size_t in_len );
/// Gets the mime type of the given wxBITMAP_TYPE
wxChar* GetMimeType(int imageType);
/// Gets the html equivalent of the specified value
wxString GetAlignment( const wxTextAttrEx& thisStyle );
/// Generates   array for indentations
wxString SymbolicIndent(long indent);
/// Finds the html equivalent of the specified bullet
void TypeOfList( const wxTextAttrEx& thisStyle, wxString& tag );
/// Closes existings or Opens new tables for navigation to an item's horizontal position.
void NavigateToListPosition( const wxTextAttrEx& thisStyle, wxTextOutputStream& str );
/// Indentation values of the table tags
wxArrayInt m_indents;
/// Horizontal position of the current table
long m_indent;
/// Is there any opened font tag
bool m_font;
/// Is there any opened ul/ol tag
bool m_list;
/// type of list, ul or ol?
bool m_is_ul;
}; };
#endif #endif

510
src/richtext/richtexthtml.cpp
View File

@@ -61,6 +61,37 @@ bool wxRichTextHTMLHandler::DoSaveFile(wxRichTextBuffer *buffer, wxOutputStream&
str << wxT("<html><head></head><body>\n"); str << wxT("<html><head></head><body>\n");
/*
wxRichText may be support paper formats like a1/a2/a3/a4
when this widget grown enough, i should turn back and support its new features
but not yet
str << wxT("<table border=0 cellpadding=0 cellspacing=0><tr><td>");
wxString left_indent = SymbolicIndent(currentParaStyle.GetLeftIndent());
wxString right_indent = SymbolicIndent(currentParaStyle.GetRightIndent());
str << wxString::Format(wxT("%s</td><td></td><td>%s</td></tr><tr>"),
left_indent.c_str(), //Document-Wide Left Indent
right_indent.c_str()); //Document-Wide Right Indent
str << wxT("<td></td><td width=\"100%\">");
*/
str << wxT("<table border=0 cellpadding=0 cellspacing=0><tr><td width=\"100%\">");
str << wxString::Format(wxT("<font face=\"%s\" size=\"%i\" color=\"#%02X%02X%02X\" >"),
currentParaStyle.GetFont().GetFaceName(), Pt_To_Size( currentParaStyle.GetFont().GetPointSize() ),
currentParaStyle.GetTextColour().Red(), currentParaStyle.GetTextColour().Green(),
currentParaStyle.GetTextColour().Blue());
//wxString align = GetAlignment( currentParaStyle.GetAlignment() );
//str << wxString::Format(wxT("<p align=\"%s\">"), align );
m_font = false;
m_indent = 0;
m_list = false;
wxRichTextObjectList::compatibility_iterator node = buffer->GetChildren().GetFirst(); wxRichTextObjectList::compatibility_iterator node = buffer->GetChildren().GetFirst();
while (node) while (node)
{ {
@@ -69,7 +100,7 @@ bool wxRichTextHTMLHandler::DoSaveFile(wxRichTextBuffer *buffer, wxOutputStream&
if (para) if (para)
{ {
OutputParagraphFormatting(currentParaStyle, para->GetAttributes(), stream, true); OutputParagraphFormatting(currentParaStyle, para->GetAttributes(), stream);
wxRichTextObjectList::compatibility_iterator node2 = para->GetChildren().GetFirst(); wxRichTextObjectList::compatibility_iterator node2 = para->GetChildren().GetFirst();
while (node2) while (node2)
@@ -78,96 +109,477 @@ bool wxRichTextHTMLHandler::DoSaveFile(wxRichTextBuffer *buffer, wxOutputStream&
wxRichTextPlainText* textObj = wxDynamicCast(obj, wxRichTextPlainText); wxRichTextPlainText* textObj = wxDynamicCast(obj, wxRichTextPlainText);
if (textObj && !textObj->IsEmpty()) if (textObj && !textObj->IsEmpty())
{ {
OutputCharacterFormatting(currentCharStyle, obj->GetAttributes(), stream, true); BeginCharacterFormatting(currentCharStyle, obj->GetAttributes(), stream);
str << textObj->GetText(); str << textObj->GetText();
OutputCharacterFormatting(currentCharStyle, obj->GetAttributes(), stream, false); EndCharacterFormatting(currentCharStyle, obj->GetAttributes(), stream);
} }
wxRichTextImage* image = wxDynamicCast(obj, wxRichTextImage);
if( image && !image->IsEmpty())
Image_to_Base64( image, stream );
node2 = node2->GetNext(); node2 = node2->GetNext();
} }
//OutputParagraphFormatting(currentParaStyle, para->GetAttributes(), stream, false);
OutputParagraphFormatting(currentParaStyle, para->GetAttributes(), stream, false);
str << wxT("<P>\n");
} }
node = node->GetNext(); node = node->GetNext();
} }
str << wxT("</body></html>\n"); str << wxT("</font></td></tr></table></body></html>\n");
return true; return true;
} }
/// Output character formatting void wxRichTextHTMLHandler::BeginCharacterFormatting(const wxTextAttrEx& currentStyle, const wxTextAttrEx& thisStyle, wxOutputStream& stream)
void wxRichTextHTMLHandler::OutputCharacterFormatting(const wxTextAttrEx& WXUNUSED(currentStyle), const wxTextAttrEx& thisStyle, wxOutputStream& stream, bool start)
{ {
wxTextOutputStream str(stream); wxTextOutputStream str(stream);
bool isBold = false; //Is the item bulleted one?
bool isItalic = false; if( thisStyle.GetBulletStyle() != wxTEXT_ATTR_BULLET_STYLE_NONE )
bool isUnderline = false;
wxString faceName;
if (thisStyle.GetFont().Ok())
{ {
if (thisStyle.GetFont().GetWeight() == wxBOLD) //Is there any opened list?
isBold = true; if( m_list )
if (thisStyle.GetFont().GetStyle() == wxITALIC) {
isItalic = true; //Yes there is
if (thisStyle.GetFont().GetUnderlined())
isUnderline = true;
faceName = thisStyle.GetFont().GetFaceName(); //Is the item among the previous ones
//Is the item one of the previous list tag's child items
if( (thisStyle.GetLeftIndent() == (m_indent + 100)) || (thisStyle.GetLeftIndent() < 100) )
str << wxT("<li>");//Yes it is
else
{
//No it isn't
//So we should close the list tag
str << (m_is_ul ? wxT("</ul>") : wxT("</ol>"));
//And renavigate to new list's horizontal position
NavigateToListPosition(thisStyle, str);
//Ok it's done
//Get the appropriate tag, an ol for numerical values, an ul for dot, square etc.
wxString tag;
TypeOfList(thisStyle, tag);
str << wxString::Format(wxT("%s<li>"), tag);
} }
if (start)
{
if (isBold)
str << wxT("<b>");
if (isItalic)
str << wxT("<i>");
if (isUnderline)
str << wxT("<u>");
} }
else else
{ {
if (isUnderline) //No there isn't a list
//navigate to new list's horizontal position(indent)
NavigateToListPosition(thisStyle, str);
//Get the appropriate tag, an ol for numerical values, an ul for dot, square etc.
wxString tag;
TypeOfList(thisStyle, tag);
str << wxString::Format(wxT("%s<li>"), tag);
//Now we have a list, mark it.
m_list = true;
}
}
else if( m_list )
{
//The item is not bulleted and there is a list what should be closed now.
//So close the list
str << (m_is_ul ? wxT("</ul>") : wxT("</ol>"));
//And mark as there is no an opened list
m_list = false;
}
// does the item have an indentation ?
if( thisStyle.GetLeftIndent() )
{
if( thisStyle.GetBulletStyle() == wxTEXT_ATTR_BULLET_STYLE_NONE )
{
if( m_indent )
{
if( (thisStyle.GetLeftIndent() + thisStyle.GetLeftSubIndent()) == m_indent )
{
if( thisStyle.GetLeftSubIndent() < 0 )
{
wxString symbolic_indent = SymbolicIndent(~thisStyle.GetLeftSubIndent());
str << wxString::Format(wxT("%s"), symbolic_indent);
}
}
else
{
if( thisStyle.GetLeftIndent() + thisStyle.GetLeftSubIndent() > m_indent )
{
Indent(thisStyle, str);
m_indent = thisStyle.GetLeftIndent() + thisStyle.GetLeftSubIndent();
m_indents.Add( m_indent );
}
else
{
int i = m_indents.size() - 1;
for(; i > -1; i--)
{
if( m_indent < (thisStyle.GetLeftIndent() + thisStyle.GetLeftSubIndent()) )
{
Indent(thisStyle, str);
m_indent = thisStyle.GetLeftIndent() + thisStyle.GetLeftSubIndent();
m_indents.Add( m_indent );
break;
}
else if( m_indent == (thisStyle.GetLeftIndent() + thisStyle.GetLeftSubIndent()) )
{
if( thisStyle.GetLeftSubIndent() < 0 )
{
wxString symbolic_indent = SymbolicIndent(~thisStyle.GetLeftSubIndent());
str << wxString::Format(wxT("%s"), symbolic_indent);
}
break;
}
else
{
str << wxT("</td></tr></table>");
m_indents.RemoveAt(i);
if( i < 1 ){m_indent=0; break;}
m_indent = m_indents[i-1];
}
}
}
}
}
else
{
Indent(thisStyle, str);
m_indent = thisStyle.GetLeftIndent() + thisStyle.GetLeftSubIndent();
m_indents.Add( m_indent );
}
}
}
else if( m_indent )
{
//The item is not indented and there is a table(s) what should be closed now.
//So close them
for(unsigned int i = 0; i < m_indents.size(); i++ )
str << wxT("</td></tr></table>");
m_indent = 0;
m_indents.Clear();
}
wxString style;
//Is there any change on the font properties of the item
if( thisStyle.GetFont().GetFaceName() != currentStyle.GetFont().GetFaceName() )
style += wxString::Format(wxT(" face=\"%s\""), thisStyle.GetFont().GetFaceName());
if( thisStyle.GetFont().GetPointSize() != currentStyle.GetFont().GetPointSize() )
style += wxString::Format(wxT(" size=\"%i\""), Pt_To_Size(thisStyle.GetFont().GetPointSize()) );
if( thisStyle.GetTextColour() != currentStyle.GetTextColour() )
style += wxString::Format(wxT(" color=\"#%02X%02X%02X\""), thisStyle.GetTextColour().Red(),
thisStyle.GetTextColour().Green(), thisStyle.GetTextColour().Blue());
if( style.size() ){str << wxString::Format(wxT("<font %s >"), style); 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>");
}
void wxRichTextHTMLHandler::EndCharacterFormatting(const wxTextAttrEx& WXUNUSED(currentStyle), const wxTextAttrEx& thisStyle, wxOutputStream& stream)
{
wxTextOutputStream str(stream);
if( thisStyle.GetFont().GetUnderlined() )
str << wxT("</u>"); str << wxT("</u>");
if (isItalic) if( thisStyle.GetFont().GetStyle() == wxITALIC )
str << wxT("</i>"); str << wxT("</i>");
if (isBold) if( thisStyle.GetFont().GetWeight() == wxBOLD )
str << wxT("</b>"); str << wxT("</b>");
if( m_font )
{
m_font = false;
str << wxT("</font>");
} }
} }
/// Output paragraph formatting /// Output paragraph formatting
void wxRichTextHTMLHandler::OutputParagraphFormatting(const wxTextAttrEx& WXUNUSED(currentStyle), const wxTextAttrEx& thisStyle, wxOutputStream& stream, bool start) void wxRichTextHTMLHandler::OutputParagraphFormatting(const wxTextAttrEx& WXUNUSED(currentStyle), const wxTextAttrEx& thisStyle, wxOutputStream& stream)
{
//If there is no opened list currently, insert a <p> after every paragraph
if(!m_list)
{ {
// TODO: lists, indentation (using tables), fonts, right-align, ...
wxTextOutputStream str(stream); wxTextOutputStream str(stream);
bool isCentered = false; wxString align = GetAlignment( thisStyle );
str << wxString::Format(wxT("<p align=\"%s\">"), align);
if (thisStyle.GetAlignment() == wxTEXT_ALIGNMENT_CENTRE) }
{
isCentered = true;
} }
if (start) void wxRichTextHTMLHandler::NavigateToListPosition(const wxTextAttrEx& thisStyle, wxTextOutputStream& str)
{ {
if (isCentered) //indenting an item using an ul/ol tag is equal to inserting 5 x &nbsp; on its left side.
str << wxT("<center>"); //so we should start from 100 point left
//Is the second td's left wall of the current indentaion table at the 100+ point-left-side
//of the item, horizontally?
if( m_indent + 100 < thisStyle.GetLeftIndent() )
{
//yes it is
LIndent(thisStyle, str);
m_indent = thisStyle.GetLeftIndent() - 100;
m_indents.Add( m_indent );
return;
} }
//No it isn't
int i = m_indents.size() - 1;
for(; i > -1; i--)
{
//Is the second td's left wall of the current indentaion table at the 100+ point-left-side
//of the item ?
if( m_indent + 100 < thisStyle.GetLeftIndent() )
{
//Yes it is
LIndent(thisStyle, str);
m_indent = thisStyle.GetLeftIndent() - 100;
m_indents.Add( m_indent );
break;
}
else if( m_indent + 100 == thisStyle.GetLeftIndent() )
break;//exact match
else else
{ {
if (isCentered) //No it is not, the second td's left wall of the current indentaion table is at the
str << wxT("</center>"); //right side of the current item horizontally, so close it.
str << wxT("</td></tr></table>");
m_indents.RemoveAt(i);
if( i < 1 ){m_indent=0; break;}
m_indent = m_indents[i-1];
}
}
}
void wxRichTextHTMLHandler::Indent( const wxTextAttrEx& thisStyle, wxTextOutputStream& str )
{
//As a five year experienced web developer i assure you there is no way to indent an item
//in html way, but we can use tables.
//Item -> "Hello world"
//Its Left Indentation -> 100
//Its Left Sub-Indentation ->40
//A typical indentation-table for the item will be construct as the following
//3 x nbsp = 60
//2 x nbsp = 40
//LSI = Left Sub Indent
//LI = Left Indent - LSI
//
//-------------------------------------------
//|&nbsp;&nbsp;nbsp;|nbsp;nbsp;Hello World |
//| | | | |
//| V | V |
//| --LI-- | --LSI-- |
//-------------------------------------------
str << wxT("<table width=\"100%\" border=\"0\" cellpadding=\"0\" cellspacing=\"0\"><tr>");
wxString symbolic_indent = SymbolicIndent( (thisStyle.GetLeftIndent() + thisStyle.GetLeftSubIndent()) - m_indent );
str << wxString::Format( wxT("<td>%s</td>"), symbolic_indent );
str << wxT("<td width=\"100%\">");
if( thisStyle.GetLeftSubIndent() < 0 )
{
symbolic_indent = SymbolicIndent(~thisStyle.GetLeftSubIndent());
str << wxString::Format(wxT("%s"), symbolic_indent);
} }
} }
void wxRichTextHTMLHandler::LIndent( const wxTextAttrEx& thisStyle, wxTextOutputStream& str )
{
//Code:
//r.BeginNumberedBullet(1, 200, 60);
//r.Newline();
//r.WriteText(wxT("first item"));
//r.EndNumberedBullet();
//r.BeginNumberedBullet(2, 200, 60);
//r.Newline();
//r.WriteText(wxT("second item."));
//r.EndNumberedBullet();
//
//A typical indentation-table for the item will be construct as the following
//1 x nbsp = 20 point
//ULI -> 100pt (UL/OL tag indents its sub element by 100 point)
//<--------- 100 pt ---------->|
//------------------------------------------------------
//|&nbsp;&nbsp;nbsp;&nbsp;nbsp;|<ul> |
//| |<-ULI-><li>first item |
//| |<-ULI-><li>second item |
//| |</ul> |
//------------------------------------------------------
// |<-100->|
str << wxT("<table width=\"100%\" border=\"0\" cellpadding=\"0\" cellspacing=\"0\"><tr>");
wxString symbolic_indent = SymbolicIndent( (thisStyle.GetLeftIndent() - m_indent) - 100);
str << wxString::Format( wxT("<td>%s</td>"), symbolic_indent );
str << wxT("<td width=\"100%\">");
}
void 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.
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;
}
}
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::Image_to_Base64(wxRichTextImage* image, wxOutputStream& stream)
{
wxTextOutputStream str(stream);
str << wxT("<img src=\"");
str << wxT("data:");
str << GetMimeType(image->GetImageBlock().GetImageType());
str << wxT(";base64,");
wxChar* data = b64enc( image->GetImageBlock().GetData(), image->GetImageBlock().GetDataSize() );
str << data;
delete[] data;
str << wxT("\" />");
}
long wxRichTextHTMLHandler::Pt_To_Size(long size)
{
//return most approximate size
if(size < 9 ) return 1;
else if( size < 11 ) return 2;
else if( size < 14 ) return 3;
else if( size < 18 ) return 4;
else if( size < 23 ) return 5;
else if( size < 30 ) return 6;
else return 7;
}
wxString wxRichTextHTMLHandler::SymbolicIndent(long indent)
{
wxString in;
for(;indent > 0; indent -= 20)
in.Append( wxT("&nbsp;") );
return in;
}
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?
const static 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 #endif
// wxUSE_STREAMS // wxUSE_STREAMS