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Keep slave program in sync with terminal #146

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Keep slave program in sync with terminal #146

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6bf14f3
XON/XOFF to keep terminal in sync
jerch Jun 25, 2016
cb7bcd5
XON/XOFF to keep terminal in sync
jerch Jun 25, 2016
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3 changes: 3 additions & 0 deletions demo/app.js
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Original file line number Diff line number Diff line change
Expand Up @@ -32,6 +32,9 @@ app.ws('/bash', function(ws, req) {
});
term.on('data', function(data) {
try {
// XOFF - stop pty pipe
// XON will be triggered by emulator before processing data chunk
term.write('\x13');
ws.send(data);
} catch (ex) {
// The WebSocket is not open, ignore
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12 changes: 12 additions & 0 deletions src/xterm.js
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Expand Up @@ -294,6 +294,9 @@
this.prefix = '';
this.postfix = '';

// user input states
this.user_xoff = false; // user pressed XOFF

/**
* An array of all lines in the entire buffer, including the prompt. The lines are array of
* characters which are 2-length arrays where [0] is an attribute and [1] is the character.
Expand Down Expand Up @@ -1458,6 +1461,11 @@
* @public
*/
Terminal.prototype.write = function(data) {
// XON - about to process data, thus we can get more
// dont lift XOFF if user pressed it
if (!this.user_xoff)
this.send('\x11');

var l = data.length, i = 0, j, cs, ch;

this.refreshStart = this.y;
Expand Down Expand Up @@ -2655,6 +2663,10 @@
}
break;
}
if (result.key === '\x13')
this.user_xoff = true;
else if (result.key === '\x11')
this.user_xoff = false;
return result;
};

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