Description
Apply nonwrapping terminal backspaces to an explicit zero-based column, without modifying stored text.
Text positions can be measured in UTF-16 code units, Unicode code points, grapheme clusters, or modeled display columns. These coordinates are not interchangeable. Invisible markers and delimiter policies can also affect interpretation even when a string looks unchanged, so the chosen representation needs to stay explicit.
Apply nonwrapping terminal backspaces to an explicit zero-based column, without modifying stored text.
When to use this tool
Use Terminal Backspace Cursor Floor when you need the stated marker, coordinate, delimiter, or normalization operation under an explicit text representation.
How to use the tool and how it works
- Enter column, backspaces. Use the units and conventions below.
- Run the tool. Correct any format, range, or cross-field input error before interpreting the output.
- Read column, discarded. Use the output convention below.
Return column=max(0,column-backspaces) and discarded=max(0,backspaces-column) for nonnegative integer inputs.1
| Input field | Meaning and units | Accepted input |
|---|---|---|
| column | Column | Required. Safe integer; minimum 0. |
| backspaces | Backspaces | Required. Safe integer; minimum 0. |
| Output field | Interpretation | Returned shape |
|---|---|---|
| column | Column | Required. Safe integer. |
| discarded | Discarded | Required. Safe integer. |
{
"input": {
"column": 3,
"backspaces": 5
},
"output": {
"column": 0,
"discarded": 2
}
}Limitations and assumptions
- Backspaces beyond the origin are discarded under this model. No character deletion, grapheme width, tab state, wrapping, or terminal control mode is simulated.
- The field tables state structural bounds; the mechanics also specify cross-field constraints. Malformed inputs and unsupported domains cause errors. A successful false flag, empty branch value, or zero placeholder has the meaning stated above and is distinct from an input error.
Alternative or Complementary methods
Choose the coordinate system required by the consumer. Use a full parser, renderer, or segmentation method when a local marker or delimiter rule cannot determine the complete text behavior.
References
Similar or alternative tools
- Terminal Backspace Column Effect
Apply count backspaces to a nonnegative integer column, stopping at zero and reporting excess count as discarded.
- Grapheme Cursor Mid Cluster Flag
Segment text using Intl.Segmenter with locale en and grapheme granularity.