2015-05-23 00:11:03 +00:00
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:(before "End Primitive Recipe Declarations")
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_BROWSE_TRACE,
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:(before "End Primitive Recipe Numbers")
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Recipe_number["$browse-trace"] = _BROWSE_TRACE;
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:(before "End Primitive Recipe Implementations")
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case _BROWSE_TRACE: {
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start_trace_browser();
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break;
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}
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:(before "End Globals")
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2015-05-23 01:00:10 +00:00
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set<long long int> Visible;
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2015-05-23 00:11:03 +00:00
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long long int Top_of_screen = 0;
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2015-05-23 01:09:34 +00:00
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long long int Last_printed_row = 0;
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2015-05-23 00:11:03 +00:00
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:(code)
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void start_trace_browser() {
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if (!Trace_stream) return;
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2015-05-23 01:00:10 +00:00
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cerr << "computing depth to display\n";
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long long int min_depth = 9999;
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for (long long int i = 0; i < SIZE(Trace_stream->past_lines); ++i) {
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trace_line& curr_line = Trace_stream->past_lines.at(i);
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if (curr_line.depth == 0) continue;
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if (curr_line.depth < min_depth) min_depth = curr_line.depth;
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}
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cerr << "depth is " << min_depth << '\n';
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cerr << "computing lines to display\n";
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for (long long int i = 0; i < SIZE(Trace_stream->past_lines); ++i) {
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if (Trace_stream->past_lines.at(i).depth == min_depth)
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Visible.insert(i);
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}
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2015-05-23 00:11:03 +00:00
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tb_init();
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Display_row = Display_column = 0;
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struct tb_event event;
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while (true) {
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render();
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do {
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tb_poll_event(&event);
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} while (event.type != TB_EVENT_KEY);
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long long int key = event.key ? event.key : event.ch;
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if (key == 'q' || key == 'Q') break;
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2015-05-23 01:09:34 +00:00
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if (key == 'j' || key == 'J') {
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if (Display_row < Last_printed_row) ++Display_row;
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}
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if (key == 'k' || key == 'K') {
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if (Display_row > 0) --Display_row;
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}
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2015-05-23 00:11:03 +00:00
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}
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tb_shutdown();
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}
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void render() {
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long long int screen_row = 0, index = 0;
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for (screen_row = 0, index = Top_of_screen; screen_row < tb_height() && index < SIZE(Trace_stream->past_lines); ++screen_row, ++index) {
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// skip lines without depth for now
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2015-05-23 01:00:10 +00:00
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while (Visible.find(index) == Visible.end()) {
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2015-05-23 00:11:03 +00:00
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++index;
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if (index >= SIZE(Trace_stream->past_lines)) goto done;
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}
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assert(index < SIZE(Trace_stream->past_lines));
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// render trace line at index
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trace_line& curr_line = Trace_stream->past_lines.at(index);
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ostringstream out;
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out << std::setw(4) << curr_line.depth << ' ' << curr_line.label << ": " << curr_line.contents;
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render_line(screen_row, out.str());
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}
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done:
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// clear rest of screen
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2015-05-23 01:09:34 +00:00
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Last_printed_row = screen_row-1;
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2015-05-23 00:11:03 +00:00
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for (; screen_row < tb_height(); ++screen_row) {
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render_line(screen_row, "~");
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}
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// move cursor back to display row at the end
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tb_set_cursor(0, Display_row);
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tb_present();
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}
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void render_line(int screen_row, const string& s) {
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long long int col = 0;
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for (col = 0; col < tb_width() && col < SIZE(s); ++col) {
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char c = s.at(col);
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if (c == '\n') c = ';'; // replace newlines with semi-colons
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2015-05-23 01:00:10 +00:00
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tb_change_cell(col, screen_row, c, TB_WHITE, TB_DEFAULT);
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2015-05-23 00:11:03 +00:00
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}
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for (; col < tb_width(); ++col) {
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tb_change_cell(col, screen_row, ' ', TB_WHITE, TB_DEFAULT);
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}
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}
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