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On Windows, when a blinking cursor is enabled, PuTTY uses the system default blink time from GetCaretBlinkTime(), which can be configured in Control Panel. Control Panel allows caret blinking to be disabled entirely, in which case GetCaretBlinkTime() returns INFINITE. PuTTY wasn't handling this case; if cursor blinking was enabled in PuTTY but disabled at the system level, the terminal window would hang, blinking the cursor madly.
22 lines
624 B
C
22 lines
624 B
C
/*
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* Wrapper for GetCaretBlinkTime() which turns it into a signed integer,
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* with 0 meaning "no blinking".
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*/
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#include "putty.h"
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#include <winuser.h>
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int get_caret_blink_time(void)
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{
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UINT blinktime = GetCaretBlinkTime();
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if (blinktime == INFINITE)
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/* Windows' registry representation for 'no caret blinking'
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* is the string "-1", but we may as well use 0 as the sentinel
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* value, as it'd be bad to attempt blinking with period 0
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* in any case. */
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return 0;
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else
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/* assume this won't be so big that casting is a problem */
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return (int) blinktime;
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}
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