readline: fix position computation #28272
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The implementation of _getDisplayPos, used to compute the cursor position and to find out how many lines to clear up when re-rendering the readline output, was counting each line (except the last one) from the input as one row, even if they were wraping. This caused some rendering issues when the 'prompt' have at least one wide line ending with a newline char, duplicating the lines at the top of the prompt when calling _refreshLine (ex: when the user hits backspace). This patch fixes the issue by computing the real rows count for each new line in the input string.
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Trott
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Jun 30, 2019
addaleax
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Jul 3, 2019
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Landed in 46a73b9, and sorry for the delay! 🎉 |
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The implementation of _getDisplayPos, used to compute the cursor position and to find out how many lines to clear up when re-rendering the readline output, was counting each line (except the last one) from the input as one row, even if they were wraping. This caused some rendering issues when the 'prompt' have at least one wide line ending with a newline char, duplicating the lines at the top of the prompt when calling _refreshLine (ex: when the user hits backspace). This patch fixes the issue by computing the real rows count for each new line in the input string. PR-URL: nodejs#28272 Reviewed-By: Rich Trott <rtrott@gmail.com> Reviewed-By: Anna Henningsen <anna@addaleax.net>
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The implementation of _getDisplayPos, used to compute the cursor position and to find out how many lines to clear up when re-rendering the readline output, was counting each line (except the last one) from the input as one row, even if they were wraping. This caused some rendering issues when the 'prompt' have at least one wide line ending with a newline char, duplicating the lines at the top of the prompt when calling _refreshLine (ex: when the user hits backspace). This patch fixes the issue by computing the real rows count for each new line in the input string. PR-URL: #28272 Reviewed-By: Rich Trott <rtrott@gmail.com> Reviewed-By: Anna Henningsen <anna@addaleax.net>
This was referenced Jul 23, 2019
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The implementation of
_getDisplayPos, used to compute the cursor position and to find out how many lines to clear up when re-rendering the readline output, was counting each line (except the last one) from the input as one row, even if they were wraping. This caused some rendering issues when the 'prompt' have at least one wide line ending with a newline char, duplicating the lines at the top of the prompt when calling_refreshLine(ex: when the user hits backspace).This patch fixes the issue by computing the real rows count for each new line in the input string.
Checklist
make -j4 test(UNIX), orvcbuild test(Windows) passes