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fix: print statistics placeholders fail in custom G-code (#16348)

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The G-code editor lists the Print Statistics placeholders for every
custom G-code field, but total_weight, used_filament, total_cost,
print_time, normal_print_time, silent_print_time,
total_wipe_tower_cost and total_wipe_tower_filament were only defined
for filename_format. Using one in custom G-code, including the File
header G-code, stopped slicing with "Not a variable name".

They are known only once the whole G-code is generated, so they use the
reserved-tag mechanism of print_time_sec and used_filament_length: the
placeholder parser gets a tag such as @TOTAL_WEIGHT@ and
GCodeProcessor::run_post_process() replaces it with the same value
filename_format gets, with numbers written to two decimals. The
per-tag replacement loops are folded into one helper. The running
extruded_* totals are unchanged.

Fixes #15320
Fixes #7870
This commit is contained in:
Ján Mišenko authored and GitHub committed 2026-10-16 16:30:05 -05:00
1 parent 6d40ec93f6
commit c6804fbb68
4 files changed
+122 -71
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src/libslic3r/GCode.cpp
+10
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@@ -3985,6 +3985,16 @@ void GCode::_do_export(Print& print, GCodeOutputStream &file, ThumbnailsGenerato
this->placeholder_parser().set("print_time_minute", new ConfigOptionString(GCodeProcessor::reserved_tag(GCodeProcessor::ETags::Print_Time_Minute_Placeholder)));
this->placeholder_parser().set("print_time_sec", new ConfigOptionString(GCodeProcessor::reserved_tag(GCodeProcessor::ETags::Print_Time_Sec_Placeholder)));
this->placeholder_parser().set("used_filament_length", new ConfigOptionString(GCodeProcessor::reserved_tag(GCodeProcessor::ETags::Used_Filament_Length_Placeholder)));
// The final print statistics are known only after the whole G-code is generated, so they are filled in during post-processing too.
// The running extruded_* totals are left alone; profiles use them as numbers.
this->placeholder_parser().set("used_filament", new ConfigOptionString(GCodeProcessor::reserved_tag(GCodeProcessor::ETags::Used_Filament_Length_Placeholder)));
this->placeholder_parser().set("print_time", new ConfigOptionString(GCodeProcessor::reserved_tag(GCodeProcessor::ETags::Normal_Print_Time_Placeholder)));
this->placeholder_parser().set("normal_print_time", new ConfigOptionString(GCodeProcessor::reserved_tag(GCodeProcessor::ETags::Normal_Print_Time_Placeholder)));
this->placeholder_parser().set("silent_print_time", new ConfigOptionString(GCodeProcessor::reserved_tag(GCodeProcessor::ETags::Silent_Print_Time_Placeholder)));
this->placeholder_parser().set("total_weight", new ConfigOptionString(GCodeProcessor::reserved_tag(GCodeProcessor::ETags::Total_Weight_Placeholder)));
this->placeholder_parser().set("total_cost", new ConfigOptionString(GCodeProcessor::reserved_tag(GCodeProcessor::ETags::Total_Cost_Placeholder)));
this->placeholder_parser().set("total_wipe_tower_cost", new ConfigOptionString(GCodeProcessor::reserved_tag(GCodeProcessor::ETags::Total_Wipe_Tower_Cost_Placeholder)));
this->placeholder_parser().set("total_wipe_tower_filament", new ConfigOptionString(GCodeProcessor::reserved_tag(GCodeProcessor::ETags::Total_Wipe_Tower_Filament_Placeholder)));
// Sync variant-mapped params into placeholder_parser before processing start gcode
update_placeholder_parser_with_variant_params();