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155 lines
3.9 KiB
C++
155 lines
3.9 KiB
C++
// -*- C++ -*-
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/**
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* \file MetricsInfo.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 André Pönitz
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* \author Stefan Schimanski
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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 METRICSINFO_H
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#define METRICSINFO_H
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#include "Changes.h"
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#include "ColorCode.h"
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#include "FontInfo.h"
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#include "support/strfwd.h"
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#include "support/Changer.h"
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#include "insets/Inset.h"
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#include <string>
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namespace lyx {
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namespace frontend { class Painter; }
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class BufferView;
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class Length;
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class MacroContext;
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//
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// This is the part common to MetricsInfo and PainterInfo
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//
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class MetricsBase {
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public:
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///
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MetricsBase(BufferView * bv = 0, FontInfo font = FontInfo(),
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int textwidth = 0);
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/// the current view
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BufferView * bv;
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/// current font
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FontInfo font;
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/// name of current font - mathed specific
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std::string fontname;
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/// This is the width available in pixels
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int textwidth;
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/// count wether the current mathdata is nested in macro(s)
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int macro_nesting;
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/// Temporarily change a full font.
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Changer changeFontSet(std::string const & font);
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/// Temporarily change the font to math if needed.
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Changer changeEnsureMath(Inset::mode_type mode = Inset::MATH_MODE);
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// Temporarily change to the style suitable for use in fractions
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Changer changeFrac();
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// Temporarily change to the style suitable for use in arrays
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// or to style suitable for smallmatrix when \c small is true.
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Changer changeArray(bool small = false);
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// Temporarily change the style to (script)script style
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Changer changeScript();
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///
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int solidLineThickness() const { return solid_line_thickness_; }
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///
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int solidLineOffset() const { return solid_line_offset_; }
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///
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int dottedLineThickness() const { return dotted_line_thickness_; }
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/** return the on-screen size of this length
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*
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* This version of the function uses the current inset width as
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* width and the EM value of the current font.
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*/
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int inPixels(Length const & len) const;
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private:
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int solid_line_thickness_;
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int solid_line_offset_;
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int dotted_line_thickness_;
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};
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//
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// This contains a MetricsBase and information that's only relevant during
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// the first phase of the two-phase draw
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//
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class MetricsInfo {
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public:
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///
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MetricsInfo();
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///
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MetricsInfo(BufferView * bv, FontInfo font, int textwidth,
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MacroContext const & mc);
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///
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MetricsBase base;
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/// The context to resolve macros
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MacroContext const & macrocontext;
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};
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//
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// This contains a MetricsBase and information that's only relevant during
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// the second phase of the two-phase draw
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//
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class PainterInfo {
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public:
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///
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PainterInfo(BufferView * bv, frontend::Painter & pain);
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///
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void draw(int x, int y, char_type c);
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///
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void draw(int x, int y, docstring const & str);
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/// Determines the background color for the specified inset based on the
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/// selection state, the background color inherited from the parent inset
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/// and the inset's own background color.
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/// \param sel whether to take the selection state into account
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ColorCode backgroundColor(Inset const * inset, bool sel = true) const;
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/// Determines the text color based on the intended color, the
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/// change tracking state and the selection state.
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/// \param color what the color should be by default
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Color textColor(Color const & color) const;
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///
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MetricsBase base;
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///
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frontend::Painter & pain;
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/// Whether the text at this point is right-to-left (for insets)
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bool ltr_pos;
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/// The change the parent is part of (change tracking)
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Change change;
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/// Whether the parent is selected as a whole
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bool selected;
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/// Whether the spell checker is enabled for the parent
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bool do_spellcheck;
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/// True when it can be assumed that the screen has been cleared
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bool full_repaint;
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/// Current background color
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ColorCode background_color;
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/// Useful for drawing display math numbering
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int leftx, rightx;
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};
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class TextMetricsInfo {};
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} // namespace lyx
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#endif
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