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Minor key-related documentation updates

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This commit is contained in:
Jeff Parsons 2017-10-09 11:15:08 -07:00 • committed by Jeff Parsons
commit 3ba86bcbe5
10 changed files with 70 additions and 60 deletions
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12
modules/pcx86/lib/keyboard.js
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@ -1030,16 +1030,19 @@ class Keyboard extends Component {
charCode = ch.charCodeAt(0);
/*
* charCodes 0x01-0x1A correspond to key combinations CTRL-A through CTRL-Z, unless they
* are \t, \n, or \r; CTRL-I, CTRL-J, and CTRL-M must be specified using \x1C, \x1D, and \x1E.
* are \t, \n, or \r, which are reserved for TAB, LINE-FEED, and RETURN, respectively, so if
* you need to simulate CTRL-I, CTRL-J, or CTRL-M, those must be specified using \x1C, \x1D,
* or \x1E, respectively. Also, since PCs have no dedicated LINE-FEED key, and since \n is
* often used instead of \r, we map LINE-FEED (LF) to RETURN (CR) below.
*
* charCodes 0xF1-0xFF establish a new delay of 100-1500ms between keys; 0xF0 reverts to
* the default delay. For example:
*
* \r\rb:\rrt\r\xff\xf0test;\r
*
* performs two return key presses, then "b:" followed by return, "rt" followed by return,
* performs two RETURN key presses, then "b:" followed by RETURN, "rt" followed by RETURN,
* then a delay of 1500ms, then a reversion to the default delay (normally 150ms), followed
* by "test;" and return.
* by "test;" and RETURN.
*/
if (charCode <= Keys.ASCII.CTRL_Z) {
if (charCode != Keys.ASCII.CTRL_I && charCode != Keys.ASCII.CTRL_J && charCode != Keys.ASCII.CTRL_M) {
@ -1063,7 +1066,8 @@ class Keyboard extends Component {
}
if (charCode) {
/*
* I could require all callers to supply CRs instead of LFs, but this is friendlier.
* I could require all callers to supply CRs instead of LFs, but this is friendlier; besides, PCs
* don't have a dedicated LINE-FEED key, so the LF charCode is somewhat meaningless.
*/
if (charCode == 0x0A) charCode = 0x0D;
this.addActiveKey(charCode, true);