83 lines
1.6 KiB
C++
83 lines
1.6 KiB
C++
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#include "base/grid_layout.h"
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#include <stdexcept>
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using namespace base;
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using namespace std;
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//----------------------------------------------------------------
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grid_layout::grid_layout()
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: nr_fields_(0)
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{
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new_row();
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}
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void
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grid_layout::render(ostream &out) const
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{
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vector<unsigned> widths;
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calc_field_widths(widths);
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grid::const_iterator row;
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for (row = grid_.begin(); row != grid_.end(); ++row) {
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row::const_iterator col;
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unsigned i;
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for (col = row->begin(), i = 0; col != row->end(); ++col, ++i)
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out << justify(widths[i], *col) << " ";
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out << "\n";
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}
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}
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void
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grid_layout::new_row()
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{
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grid_.push_back(row());
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}
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grid_layout::row const &
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grid_layout::current_row() const
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{
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return grid_.back();
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}
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grid_layout::row &
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grid_layout::current_row()
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{
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return grid_.back();
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}
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void
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grid_layout::push_field(string const &s)
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{
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current_row().push_back(s);
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nr_fields_ = max<unsigned>(nr_fields_, current_row().size());
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}
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void
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grid_layout::calc_field_widths(vector<unsigned> &widths) const
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{
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widths.resize(nr_fields_, 0);
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grid::const_iterator row;
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for (row = grid_.begin(); row != grid_.end(); ++row) {
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row::const_iterator col;
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unsigned i;
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for (col = row->begin(), i = 0; col != row->end(); ++col, ++i)
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widths[i] = max<unsigned>(widths[i], col->length());
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}
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}
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string
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grid_layout::justify(unsigned width, string const &txt) const
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{
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if (txt.length() > width)
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throw runtime_error("string field too long, internal error");
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string result(width - txt.length(), ' ');
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result += txt;
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return result;
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}
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//----------------------------------------------------------------
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