1 #include "math_textinset.h"
2 #include "metricsinfo.h"
8 MathTextInset::MathTextInset()
13 auto_ptr<InsetBase> MathTextInset::clone() const
15 return auto_ptr<InsetBase>(new MathTextInset(*this));
19 MathInset::idx_type MathTextInset::pos2row(pos_type pos) const
21 for (pos_type r = 0, n = cache_.nargs(); r < n; ++r)
22 if (pos >= cache_.cellinfo_[r].begin_ && pos <= cache_.cellinfo_[r].end_)
24 lyxerr << "illegal row for pos " << pos << "\n";
29 void MathTextInset::getPos(idx_type /*idx*/, pos_type pos, int & x, int & y) const
31 idx_type const i = pos2row(pos);
32 pos_type const p = pos - cache_.cellinfo_[i].begin_;
33 cache_.getPos(i, p, x, y);
34 y = cache_.cell(i).yo();
38 bool MathTextInset::idxUpDown2(idx_type &, pos_type & pos, bool up,
39 int /*targetx*/) const
41 // try to move only one screen row up or down if possible
42 idx_type i = pos2row(pos);
43 //lyxerr << "\nMathTextInset::idxUpDown() i: " << i << endl;
44 MathGridInset::CellInfo const & cell1 = cache_.cellinfo_[i];
45 int const x = cache_.cell(i).pos2x(pos - cell1.begin_, cell1.glue_);
52 if (i == cache_.nargs())
55 MathGridInset::CellInfo const & cell2 = cache_.cellinfo_[i];
56 pos = cell2.begin_ + cache_.cell(i).x2pos(x, cell2.glue_);
61 void MathTextInset::metrics(MetricsInfo & mi, Dimension & dim) const
65 // we do our own metrics fiddling
66 // save old positional information
67 int const old_xo = cache_.cell(0).xo();
68 int const old_yo = cache_.cell(0).yo();
71 cache_ = MathGridInset(1, 0);
78 for (size_type i = 0, n = cell(0).size(); i < n; ++i) {
79 //lyxerr << "at pos: " << i << " of " << n << " safepos: " << safepos
80 // << " curr: " << curr << " safe: " << safe
81 // << " spaces: " << spaces << endl;
84 // <char> <char> <char> <space> <char> <char> <char>
85 // ................... <safe>
86 // ..........................<curr>
87 // ....................<safepos>
89 // Special handling of spaces. We reached a safe position for breaking.
90 char const c = cell(0)[i]->getChar();
92 //lyxerr << "reached safe pos\n";
93 // we don't count the space into the safe pos
95 // we reset to this safepos if the next chunk does not fit
98 // restart chunk with size of the space
99 curr = cell(0)[i].width_;
104 // This is a regular char. Go on if we either don't care for
105 // the width limit or have not reached that limit.
106 curr += cell(0)[i].width_;
107 if (curr + safe <= mi.base.textwidth)
111 // We passed the limit. Create a row entry.
112 //lyxerr << "passed limit\n";
114 MathArray & ar = cache_.cell(cache_.nargs() - 1);
115 MathGridInset::CellInfo & row = cache_.cellinfo_.back();
117 // we are here because we hit a hard newline
120 begin = i + 1; // next chunk starts after the newline
123 // but we had a space break before this position.
124 // so retreat to this position
125 //lyxerr << "... but had safe pos.\n";
127 row.end_ = safepos; // this is position of the safe space
128 i = safepos; // i gets incremented at end of loop
129 begin = i + 1; // next chunk starts after the space
132 // This item is too large and it is the only one.
133 // We have no choice but to produce an overfull box.
134 lyxerr << "... without safe pos\n";
139 ar = MathArray(cell(0).begin() + row.begin_, cell(0).begin() + row.end_);
140 //lyxerr << "line: " << ar << "\n";
141 // in any case, start the new row with empty boxes
145 // last row: put in everything else
147 MathArray & ar = cache_.cell(cache_.nargs() - 1);
148 MathGridInset::CellInfo & row = cache_.cellinfo_.back();
150 row.end_ = cell(0).size();
151 ar = MathArray(cell(0).begin() + row.begin_, cell(0).begin() + row.end_);
152 //lyxerr << "last line: " << ar.data() << "\n";
155 cache_.metrics(mi, dim_);
156 //lyxerr << "outer dim: " << dim_ << endl;
158 // reset position cache
159 for (idx_type i = 0; i < cache_.nargs(); ++i)
160 cache_.cell(i).setXY(old_xo, old_yo);
166 void MathTextInset::draw(PainterInfo & pi, int x, int y) const
168 cache_.draw(pi, x + 1, y);
172 void MathTextInset::drawSelection(PainterInfo & pi,
173 idx_type idx1, pos_type pos1, idx_type idx2, pos_type pos2) const
175 cache_.drawSelection(pi, idx1, pos1, idx2, pos2);