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49c949d65e
This allow configuring which characters should be used to render tabs, spaces, and newlines (when “show invisibles” is enabled).
88 lines
2.7 KiB
C++
88 lines
2.7 KiB
C++
#ifndef CT_H_IWVOT7CS
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#define CT_H_IWVOT7CS
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#include <theme/theme.h>
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namespace ng
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{
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struct PUBLIC context_t
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{
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context_t (CGContextRef context, CGImageRef spellingDot = nil, std::function<CGImageRef(double, double)> foldingDotsFactory = std::function<CGImageRef(double, double)>());
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~context_t ();
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operator CGContextRef () const { return _context; }
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CGImageRef spelling_dot () const { return _spelling_dot; }
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CGImageRef folding_dots (double, double) const;
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private:
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CGContextRef _context;
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CGImageRef _spelling_dot;
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std::function<CGImageRef(double, double)> _folding_dots_create;
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mutable std::map<std::pair<double, double>, CGImageRef> _folding_dots_cache;
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};
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struct invisibles_t
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{
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bool enabled = false;
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std::string tab = "‣";
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std::string space = "·";
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std::string newline = "¬";
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};
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} /* ng */
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namespace ct
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{
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struct metrics_t
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{
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metrics_t (std::string const& fontName, CGFloat fontSize);
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CGFloat ascent () const { return _ascent; }
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CGFloat descent () const { return _descent; }
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CGFloat leading () const { return _leading; }
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CGFloat x_height () const { return _x_height; }
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CGFloat cap_height () const { return _cap_height; }
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CGFloat column_width () const { return _column_width; }
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CGFloat baseline (CGFloat minAscent = 0) const { return round(std::max(minAscent, _ascent) + _ascent_delta); }
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CGFloat line_height (CGFloat minAscent = 0, CGFloat minDescent = 0, CGFloat minLeading = 0) const;
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private:
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CGFloat _ascent;
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CGFloat _descent;
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CGFloat _leading;
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CGFloat _x_height;
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CGFloat _cap_height;
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CGFloat _column_width;
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CGFloat _ascent_delta = 1;
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CGFloat _leading_delta = 1;
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};
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struct line_t
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{
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line_t (std::string const& text, std::map<size_t, scope::scope_t> const& scopes, theme_ptr const& theme, CGColorRef textColor = NULL);
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void draw_foreground (CGPoint pos, ng::context_t const& context, bool isFlipped, std::vector< std::pair<size_t, size_t> > const& misspelled) const;
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void draw_background (CGPoint pos, CGFloat height, ng::context_t const& context, bool isFlipped, CGColorRef currentBackground) const;
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CGFloat width (CGFloat* ascent = NULL, CGFloat* descent = NULL, CGFloat* leading = NULL) const;
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size_t index_for_offset (CGFloat offset) const;
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CGFloat offset_for_index (size_t index) const;
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private:
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typedef std::shared_ptr<struct __CTLine const> CTLinePtr;
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typedef std::shared_ptr<struct CGColor> CGColorPtr;
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std::string _text;
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CTLinePtr _line;
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std::vector< std::pair<CFRange, CGColorPtr> > _backgrounds;
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std::vector< std::pair<CFRange, CGColorPtr> > _underlines;
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};
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} /* ct */
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#endif /* end of include guard: CT_H_IWVOT7CS */
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