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///////////////////////////////////////////////////////////////////////////////
// Name: wx/osx/cocoa/private/markuptoattr.h
// Purpose: Class to convert markup to Cocoa attributed strings.
// Author: Vadim Zeitlin
// Created: 2011-02-22
// Copyright: (c) 2011 Vadim Zeitlin <vadim@wxwidgets.org>
// Licence: wxWindows licence
///////////////////////////////////////////////////////////////////////////////
#ifndef _WX_OSX_COCOA_PRIVATE_MARKUPTOATTR_H_
#define _WX_OSX_COCOA_PRIVATE_MARKUPTOATTR_H_
#include "wx/private/markupparserattr.h"
// ----------------------------------------------------------------------------
// wxMarkupToAttrString: create NSAttributedString from markup.
// ----------------------------------------------------------------------------
class wxMarkupToAttrStringBase : public wxMarkupParserAttrOutput
{
protected:
// We don't care about the original colours because we never use them but
// we do need the correct initial font as we apply modifiers (e.g. create a
// font larger than it) to it and so it must be valid.
wxMarkupToAttrStringBase(const wxFont& font)
: wxMarkupParserAttrOutput(font, wxColour(), wxColour()),
m_attrString(NULL)
{}
void Parse(const wxFont& font, const wxString& markup)
{
const wxCFStringRef label(PrepareText(wxMarkupParser::Strip(markup)));
m_attrString = [[NSMutableAttributedString alloc]
initWithString: label.AsNSString()];
m_pos = 0;
[m_attrString beginEditing];
// First thing we do is change the default string font: as mentioned in
// Apple documentation, attributed strings use "Helvetica 12" font by
// default which is different from the system "Lucida Grande" font. So
// we need to explicitly change the font for the entire string.
ApplyFont(font, NSMakeRange(0, [m_attrString length]));
// Now translate the markup tags to corresponding attributes.
wxMarkupParser parser(*this);
parser.Parse(markup);
[m_attrString endEditing];
}
~wxMarkupToAttrStringBase()
{
if ( m_attrString )
[m_attrString release];
}
void ApplyFont(const wxFont& font, const NSRange& range)
{
[m_attrString addAttribute:NSFontAttributeName
value:font.OSXGetNSFont()
range:range];
if ( font.GetStrikethrough() )
{
[m_attrString addAttribute:NSStrikethroughStyleAttributeName
value:@(NSUnderlineStyleSingle)
range:range];
}
if ( font.GetUnderlined() )
{
[m_attrString addAttribute:NSUnderlineStyleAttributeName
value:@(NSUnderlineStyleSingle)
range:range];
}
}
// prepare text chunk for display, e.g. strip mnemonics from it
virtual wxString PrepareText(const wxString& text) = 0;
public:
// Accessor for the users of this class.
//
// We keep ownership of the returned string.
NSMutableAttributedString *GetNSAttributedString() const
{
return m_attrString;
}
// Implement base class pure virtual methods to process markup tags.
virtual void OnText(const wxString& text)
{
m_pos += PrepareText(text).length();
}
virtual void OnAttrStart(const Attr& WXUNUSED(attr))
{
// Just remember the starting position of the range, we can't really
// set the attribute until we find the end of it.
m_rangeStarts.push(m_pos);
}
virtual void OnAttrEnd(const Attr& attr)
{
unsigned start = m_rangeStarts.top();
m_rangeStarts.pop();
const NSRange range = NSMakeRange(start, m_pos - start);
ApplyFont(attr.font, range);
if ( attr.foreground.IsOk() )
{
[m_attrString addAttribute:NSForegroundColorAttributeName
value:attr.foreground.OSXGetNSColor()
range:range];
}
if ( attr.background.IsOk() )
{
[m_attrString addAttribute:NSBackgroundColorAttributeName
value:attr.background.OSXGetNSColor()
range:range];
}
}
private:
// The attributed string we're building.
NSMutableAttributedString *m_attrString;
// The current position in the output string.
unsigned m_pos;
// The positions of starting ranges.
wxStack<unsigned> m_rangeStarts;
};
// for use with labels with mnemonics
class wxMarkupToAttrString : public wxMarkupToAttrStringBase
{
public:
wxMarkupToAttrString(const wxFont& font, const wxString& markup)
: wxMarkupToAttrStringBase(font)
{
Parse(font, markup);
}
protected:
virtual wxString PrepareText(const wxString& text)
{
return wxControl::RemoveMnemonics(text);
}
wxDECLARE_NO_COPY_CLASS(wxMarkupToAttrString);
};
// for raw markup with no mnemonics
class wxItemMarkupToAttrString : public wxMarkupToAttrStringBase
{
public:
wxItemMarkupToAttrString(const wxFont& font, const wxString& markup)
: wxMarkupToAttrStringBase(font)
{
Parse(font, markup);
}
protected:
virtual wxString PrepareText(const wxString& text)
{
return text;
}
wxDECLARE_NO_COPY_CLASS(wxItemMarkupToAttrString);
};
#endif // _WX_OSX_COCOA_PRIVATE_MARKUPTOATTR_H_
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