[9fans] FR: Acme: It shouldn't be easy to "cancel" double click

[9fans] FR: Acme: It shouldn't be easy to "cancel" double click

[kalterdev]

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Expected behavior

If I double click on a word or line (.*\n) with button 1 and then move
the mouse, I'd like to preserve the original selection of the word or
line.

This feature is particularly useful with 1-2 button chord. Currently,
the chord requires no mouse movement between the first and second
clicks.

What must happen to the selection as the mouse moves is a derivative
issue. Contemporary editors expand the initial selection, but they
don't mangle the initial state of the selection. As an alternative,
not expanding the selection could do the job as well.

Unexpected behavior

If I double click on a word or line with button 1 and move the mouse,
the initial selection goes away.

Steps to reproduce the problem

Double click on a word with button 1 and move the mouse.

Double click in the beginning or end of a line and move the mouse.

plan9port version

a2567fcac9851e5cc965a236679f568b0e79cff2

OS version

macOS 14.5 (23F79)

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