// -*- C++ -*- /* \file CoordCache.h * This file is part of LyX, the document processor. * Licence details can be found in the file COPYING. * * \author André Pönitz * * Full author contact details are available in file CREDITS. */ #ifndef COORDCACHE_H #define COORDCACHE_H // It seems that MacOSX define the check macro. #undef check #include "Dimension.h" #include <map> namespace lyx { class Inset; class Text; class MathData; class Paragraph; void lyxbreaker(void const * data, const char * hint, int size); struct Geometry { Point pos; Dimension dim; bool covers(int x, int y) const { return x >= pos.x_ && x <= pos.x_ + dim.wid && y >= pos.y_ - dim.asc && y <= pos.y_ + dim.des; } int squareDistance(int x, int y) const { int xx = 0; int yy = 0; if (x < pos.x_) xx = pos.x_ - x; else if (x > pos.x_ + dim.wid) xx = x - pos.x_ - dim.wid; if (y < pos.y_ - dim.asc) yy = pos.y_ - dim.asc - y; else if (y > pos.y_ + dim.des) yy = y - pos.y_ - dim.des; // Optimisation: We avoid to compute the sqrt on purpose. return xx*xx + yy*yy; } }; template <class T> class CoordCacheBase { public: void clear() { data_.clear(); } bool empty() const { return data_.empty(); } void add(T const * thing, int x, int y) { data_[thing].pos = Point(x, y); } void add(T const * thing, Dimension const & dim) { if (!has(thing)) data_[thing].pos = Point(-10000, -10000); data_[thing].dim = dim; } Geometry const & geometry(T const * thing) const { check(thing, "geometry"); return data_.find(thing)->second; } Dimension const & dim(T const * thing) const { checkDim(thing, "dim"); return data_.find(thing)->second.dim; } int x(T const * thing) const { check(thing, "x"); return data_.find(thing)->second.pos.x_; } int y(T const * thing) const { check(thing, "y"); return data_.find(thing)->second.pos.y_; } Point xy(T const * thing) const { check(thing, "xy"); return data_.find(thing)->second.pos; } bool has(T const * thing) const { typename cache_type::const_iterator it = data_.find(thing); if (it == data_.end()) return false; return it->second.pos.x_ != -10000; } bool hasDim(T const * thing) const { return data_.find(thing) != data_.end(); } bool covers(T const * thing, int x, int y) const { typename cache_type::const_iterator it = data_.find(thing); return it != data_.end() && it->second.covers(x, y); } int squareDistance(T const * thing, int x, int y) const { typename cache_type::const_iterator it = data_.find(thing); if (it == data_.end()) return 1000000; return it->second.squareDistance(x, y); } private: friend class CoordCache; void checkDim(T const * thing, char const * hint) const { if (!hasDim(thing)) lyxbreaker(thing, hint, data_.size()); } void check(T const * thing, char const * hint) const { if (!has(thing)) lyxbreaker(thing, hint, data_.size()); } typedef std::map<T const *, Geometry> cache_type; cache_type data_; }; /** * A BufferView dependent cache that allows us to come from an inset in * a document to a position point and dimension on the screen. * All points cached in this cache are only valid between subsequent * updates. (x,y) == (0,0) is the upper left screen corner, x increases * to the right, y increases downwords. * The dimension part is built in BufferView::updateMetrics() and the * diverse Inset::metrics() calls. * The individual points are added at drawing time in * BufferView::draw(). The math inset position are cached in * the diverse InsetMathXXX::draw() calls and the in-text inset position * are cached in RowPainter::paintInset(). * FIXME: For mathed, it would be nice if the insets did not saves their * position themselves. That should be the duty of the containing math * array. */ class CoordCache { public: void clear(); /// A map from MathData to position on the screen typedef CoordCacheBase<MathData> Arrays; Arrays & arrays() { return arrays_; } Arrays const & getArrays() const { return arrays_; } /// A map from insets to positions on the screen typedef CoordCacheBase<Inset> Insets; Insets & insets() { return insets_; } Insets const & getInsets() const { return insets_; } /// Dump the contents of the cache to lyxerr in debugging form void dump() const; private: /// MathDatas Arrays arrays_; // All insets Insets insets_; }; } // namespace lyx #endif