121 lines
4.0 KiB
C++
121 lines
4.0 KiB
C++
///////////////////////////////////////////////////////////////////////////////
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// Name: wx/osx/cocoa/private/markuptoattr.h
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// Purpose: Class to convert markup to Cocoa attributed strings.
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// Author: Vadim Zeitlin
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// Created: 2011-02-22
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// RCS-ID: $Id: markuptoattr.h 67069 2011-02-27 12:48:46Z VZ $
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// Copyright: (c) 2011 Vadim Zeitlin <vadim@wxwidgets.org>
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// Licence: wxWindows licence
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///////////////////////////////////////////////////////////////////////////////
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#ifndef _WX_OSX_COCOA_PRIVATE_MARKUPTOATTR_H_
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#define _WX_OSX_COCOA_PRIVATE_MARKUPTOATTR_H_
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#include "wx/private/markupparserattr.h"
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// ----------------------------------------------------------------------------
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// wxMarkupToAttrString: create NSAttributedString from markup.
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// ----------------------------------------------------------------------------
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class wxMarkupToAttrString : public wxMarkupParserAttrOutput
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{
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public:
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// We don't care about the original colours because we never use them but
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// we do need the correct initial font as we apply modifiers (e.g. create a
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// font larger than it) to it and so it must be valid.
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wxMarkupToAttrString(wxWindow *win, const wxString& markup)
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: wxMarkupParserAttrOutput(win->GetFont(), wxColour(), wxColour())
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{
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const wxCFStringRef
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label(wxControl::RemoveMnemonics(wxMarkupParser::Strip(markup)));
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m_attrString = [[NSMutableAttributedString alloc]
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initWithString: label.AsNSString()];
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m_pos = 0;
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[m_attrString beginEditing];
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// First thing we do is change the default string font: as mentioned in
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// Apple documentation, attributed strings use "Helvetica 12" font by
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// default which is different from the system "Lucida Grande" font. So
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// we need to explicitly change the font for the entire string.
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[m_attrString addAttribute:NSFontAttributeName
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value:win->GetFont().OSXGetNSFont()
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range:NSMakeRange(0, [m_attrString length])];
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// Now translate the markup tags to corresponding attributes.
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wxMarkupParser parser(*this);
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parser.Parse(markup);
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[m_attrString endEditing];
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}
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~wxMarkupToAttrString()
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{
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[m_attrString release];
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}
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// Accessor for the users of this class.
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//
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// We keep ownership of the returned string.
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NSMutableAttributedString *GetNSAttributedString() const
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{
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return m_attrString;
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}
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// Implement base class pure virtual methods to process markup tags.
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virtual void OnText(const wxString& text)
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{
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m_pos += wxControl::RemoveMnemonics(text).length();
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}
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virtual void OnAttrStart(const Attr& WXUNUSED(attr))
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{
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// Just remember the starting position of the range, we can't really
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// set the attribute until we find the end of it.
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m_rangeStarts.push(m_pos);
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}
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virtual void OnAttrEnd(const Attr& attr)
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{
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unsigned start = m_rangeStarts.top();
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m_rangeStarts.pop();
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const NSRange range = NSMakeRange(start, m_pos - start);
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[m_attrString addAttribute:NSFontAttributeName
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value:attr.font.OSXGetNSFont()
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range:range];
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if ( attr.foreground.IsOk() )
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{
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[m_attrString addAttribute:NSForegroundColorAttributeName
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value:attr.foreground.OSXGetNSColor()
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range:range];
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}
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if ( attr.background.IsOk() )
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{
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[m_attrString addAttribute:NSBackgroundColorAttributeName
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value:attr.background.OSXGetNSColor()
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range:range];
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}
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}
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private:
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// The attributed string we're building.
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NSMutableAttributedString *m_attrString;
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// The current position in the output string.
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unsigned m_pos;
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// The positions of starting ranges.
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wxStack<unsigned> m_rangeStarts;
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wxDECLARE_NO_COPY_CLASS(wxMarkupToAttrString);
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};
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#endif // _WX_OSX_COCOA_PRIVATE_MARKUPTOATTR_H_
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