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147 lines
3.3 KiB
C++
147 lines
3.3 KiB
C++
// -*- C++ -*-
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/**
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* \file MathRow.h
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* This file is part of LyX, the document processor.
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* Licence details can be found in the file COPYING.
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*
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* \author Jean-Marc Lasgouttes
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*
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* Full author contact details are available in file CREDITS.
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*/
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#ifndef MATH_ROW_H
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#define MATH_ROW_H
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#include "MathClass.h"
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#include "ColorCode.h"
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#include "Dimension.h"
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#include "support/docstring.h"
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#include <vector>
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namespace lyx {
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class BufferView;
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class InsetMath;
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class MathData;
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class MetricsInfo;
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class PainterInfo;
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enum class marker_type : int;
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/*
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* While for editing purpose it is important that macros are counted
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* as a single element, this is not the case for display. To get the
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* spacing correct, it is necessary to dissolve all the macros that
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* can be, along with their arguments. Then one obtains a
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* representation of the MathData contents as a string of insets and
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* then spacing can be done properly.
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*
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* This is the purpose of the MathRow class.
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*/
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class MathRow
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{
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public:
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// What row elements can be
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enum Type {
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INSET, // this element is a plain inset
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BOX, // an empty box
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BEGIN, // an inset and/or a math array begins here
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END, // an inset and/or a math array ends here
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DUMMY // a dummy element (used before or after row)
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};
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// An elements, together with its spacing
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struct Element
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{
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///
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Element(MetricsInfo const & mi, Type t, MathClass mc = MC_UNKNOWN);
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/// Classifies the contents of the object
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Type type;
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/// the class of the element
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MathClass mclass;
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/// the spacing around the element
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int before, after;
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/// count whether the current mathdata is nested in macro(s)
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int macro_nesting;
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/// Marker type
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marker_type marker;
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/// When type is INSET
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/// the math inset (also for BEGIN and END)
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InsetMath const * inset;
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// Non empty when there is a completion to draw
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docstring compl_text;
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// the number of characters forming the unique part.
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size_t compl_unique_to;
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// type is BEGIN, END
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MathData const * ar;
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// type is BOX
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ColorCode color;
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};
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///
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MathRow() {}
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///
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MathRow(Dimension const & dim) : caret_dim(dim) {}
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///
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typedef std::vector<Element> Elements;
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///
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typedef Elements::iterator iterator;
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///
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typedef Elements::const_iterator const_iterator;
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///
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iterator begin() { return elements_.begin(); }
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///
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iterator end() { return elements_.end(); }
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///
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const_iterator begin() const { return elements_.begin(); }
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///
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const_iterator end() const { return elements_.end(); }
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//
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void push_back(Element const & e) { elements_.push_back(e); }
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//
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Element & back() { return elements_.back(); }
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// create the math row by unwinding all macros in the MathData and
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// compute the spacings.
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MathRow(MetricsInfo & mi, MathData const * ar);
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//
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void metrics(MetricsInfo & mi, Dimension & dim);
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//
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void draw(PainterInfo & pi, int const x, int const y) const;
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/// superscript kerning
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int kerning(BufferView const *) const;
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/// useful when the caret visits this cell
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Dimension caret_dim;
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private:
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// Index of the first inset element before position i
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int before(int i) const;
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// Index of the first inset element after position i
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int after(int i) const;
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///
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Elements elements_;
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};
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///
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std::ostream & operator<<(std::ostream & os, MathRow::Element const & elt);
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///
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std::ostream & operator<<(std::ostream & os, MathRow const & mrow);
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} // namespace lyx
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#endif
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