mirror of https://github.com/lukechilds/node.git
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
424 lines
11 KiB
424 lines
11 KiB
// Inspiration for this code comes from Salvatore Sanfilippo's linenoise.
|
|
// http://github.com/antirez/linenoise
|
|
// Reference:
|
|
// * http://invisible-island.net/xterm/ctlseqs/ctlseqs.html
|
|
// * http://www.3waylabs.com/nw/WWW/products/wizcon/vt220.html
|
|
|
|
var kHistorySize = 30;
|
|
var kBufSize = 10*1024;
|
|
|
|
|
|
var Buffer = require('buffer').Buffer;
|
|
var sys = require('sys');
|
|
var inherits = require('sys').inherits;
|
|
var EventEmitter = require('events').EventEmitter;
|
|
var stdio = process.binding('stdio');
|
|
|
|
|
|
exports.createInterface = function (output, completer) {
|
|
return new Interface(output, completer);
|
|
};
|
|
|
|
function Interface (output, completer) {
|
|
this.output = output;
|
|
this.completer = completer;
|
|
|
|
this.setPrompt("node> ");
|
|
|
|
this._tty = output.fd < 3;
|
|
|
|
if (parseInt(process.env['NODE_NO_READLINE'])) {
|
|
this._tty = false;
|
|
}
|
|
|
|
if (this._tty) {
|
|
// input refers to stdin
|
|
|
|
// Current line
|
|
this.line = "";
|
|
|
|
// Check process.env.TERM ?
|
|
stdio.setRawMode(true);
|
|
this._tty = true;
|
|
|
|
// Cursor position on the line.
|
|
this.cursor = 0;
|
|
|
|
this.history = [];
|
|
this.historyIndex = -1;
|
|
}
|
|
}
|
|
|
|
inherits(Interface, EventEmitter);
|
|
|
|
Interface.prototype.__defineGetter__("columns", function () {
|
|
if (this._tty) {
|
|
return stdio.getColumns();
|
|
}
|
|
});
|
|
|
|
Interface.prototype.setPrompt = function (prompt, length) {
|
|
this._prompt = prompt;
|
|
this._promptLength = length ? length : Buffer.byteLength(prompt);
|
|
};
|
|
|
|
|
|
Interface.prototype.prompt = function () {
|
|
if (this._tty) {
|
|
this.cursor = 0;
|
|
this._refreshLine();
|
|
} else {
|
|
this.output.write(this._prompt);
|
|
}
|
|
};
|
|
|
|
|
|
Interface.prototype._addHistory = function () {
|
|
if (this.line.length === 0) return "";
|
|
|
|
this.history.unshift(this.line);
|
|
this.line = "";
|
|
this.historyIndex = -1;
|
|
|
|
this.cursor = 0;
|
|
|
|
// Only store so many
|
|
if (this.history.length > kHistorySize) this.history.pop();
|
|
|
|
return this.history[0];
|
|
};
|
|
|
|
|
|
Interface.prototype._refreshLine = function () {
|
|
if (this._closed) return;
|
|
|
|
stdio.setRawMode(true);
|
|
|
|
// Cursor to left edge.
|
|
this.output.write('\x1b[0G');
|
|
|
|
// Write the prompt and the current buffer content.
|
|
this.output.write(this._prompt);
|
|
this.output.write(this.line);
|
|
|
|
// Erase to right.
|
|
this.output.write('\x1b[0K');
|
|
|
|
// Move cursor to original position.
|
|
this.output.write('\x1b[0G\x1b[' + (this._promptLength + this.cursor) + 'C');
|
|
};
|
|
|
|
|
|
Interface.prototype.close = function (d) {
|
|
if (this._tty) {
|
|
stdio.setRawMode(false);
|
|
}
|
|
this.emit('close');
|
|
this._closed = true;
|
|
};
|
|
|
|
|
|
Interface.prototype.write = function (d) {
|
|
if (this._closed) return;
|
|
return this._tty ? this._ttyWrite(d) : this._normalWrite(d);
|
|
};
|
|
|
|
|
|
Interface.prototype._normalWrite = function (b) {
|
|
// Very simple implementation right now. Should try to break on
|
|
// new lines.
|
|
this.emit('line', b.toString());
|
|
};
|
|
|
|
Interface.prototype._insertString = function (c) {
|
|
//BUG: Problem when adding tabs with following content.
|
|
// Perhaps the bug is in _refreshLine(). Not sure.
|
|
// A hack would be to insert spaces instead of literal '\t'.
|
|
if (this.cursor < this.line.length) {
|
|
var beg = this.line.slice(0, this.cursor);
|
|
var end = this.line.slice(this.cursor, this.line.length);
|
|
this.line = beg + c + end;
|
|
this.cursor += c.length;
|
|
this._refreshLine();
|
|
} else {
|
|
this.line += c;
|
|
this.cursor += c.length;
|
|
this.output.write(c);
|
|
}
|
|
};
|
|
|
|
Interface.prototype._tabComplete = function () {
|
|
var self = this;
|
|
|
|
var rv = this.completer(self.line.slice(0, self.cursor));
|
|
var completions = rv[0],
|
|
completeOn = rv[1]; // the text that was completed
|
|
if (completions && completions.length) {
|
|
// Apply/show completions.
|
|
if (completions.length === 1) {
|
|
self._insertString(completions[0].slice(completeOn.length));
|
|
self._refreshLine();
|
|
} else {
|
|
self.output.write("\r\n");
|
|
var width = completions.reduce(function(a, b) {
|
|
return a.length > b.length ? a : b;
|
|
}).length + 2; // 2 space padding
|
|
var maxColumns = Math.floor(this.columns / width) || 1;
|
|
|
|
function handleGroup(group) {
|
|
if (group.length == 0) {
|
|
return;
|
|
}
|
|
var minRows = Math.ceil(group.length / maxColumns);
|
|
for (var row = 0; row < minRows; row++) {
|
|
for (var col = 0; col < maxColumns; col++) {
|
|
var idx = row * maxColumns + col;
|
|
if (idx >= group.length) {
|
|
break;
|
|
}
|
|
var item = group[idx];
|
|
self.output.write(item);
|
|
if (col < maxColumns - 1) {
|
|
for (var s = 0; s < width - item.length; s++) {
|
|
self.output.write(' ');
|
|
}
|
|
}
|
|
}
|
|
self.output.write('\r\n');
|
|
}
|
|
self.output.write('\r\n');
|
|
}
|
|
|
|
var group = [], c, i;
|
|
for (i = 0; i < completions.length; i++) {
|
|
c = completions[i];
|
|
if (c === "") {
|
|
handleGroup(group);
|
|
group = [];
|
|
} else {
|
|
group.push(c);
|
|
}
|
|
}
|
|
handleGroup(group);
|
|
|
|
// If there is a common prefix to all matches, then apply that
|
|
// portion.
|
|
var prefix = commonPrefix(
|
|
completions.filter(function(e) { if (e) return e }));
|
|
if (prefix.length > completeOn.length) {
|
|
self._insertString(prefix.slice(completeOn.length));
|
|
}
|
|
|
|
self._refreshLine();
|
|
}
|
|
}
|
|
};
|
|
|
|
function commonPrefix(strings) {
|
|
if (!strings || strings.length == 0) {
|
|
return "";
|
|
}
|
|
var sorted = strings.slice().sort();
|
|
var min = sorted[0];
|
|
var max = sorted[sorted.length - 1];
|
|
for (var i = 0; i < min.length; i++) {
|
|
if (min[i] != max[i]) {
|
|
return min.slice(0, i);
|
|
}
|
|
}
|
|
return min;
|
|
}
|
|
|
|
Interface.prototype._historyNext = function () {
|
|
if (this.historyIndex > 0) {
|
|
this.historyIndex--;
|
|
this.line = this.history[this.historyIndex];
|
|
this.cursor = this.line.length; // set cursor to end of line.
|
|
this._refreshLine();
|
|
|
|
} else if (this.historyIndex === 0) {
|
|
this.historyIndex = -1;
|
|
this.cursor = 0;
|
|
this.line = '';
|
|
this._refreshLine();
|
|
}
|
|
};
|
|
|
|
Interface.prototype._historyPrev = function () {
|
|
if (this.historyIndex + 1 < this.history.length) {
|
|
this.historyIndex++;
|
|
this.line = this.history[this.historyIndex];
|
|
this.cursor = this.line.length; // set cursor to end of line.
|
|
|
|
this._refreshLine();
|
|
}
|
|
};
|
|
|
|
// handle a write from the tty
|
|
Interface.prototype._ttyWrite = function (b) {
|
|
switch (b[0]) {
|
|
/* ctrl+c */
|
|
case 3:
|
|
//process.kill(process.pid, "SIGINT");
|
|
this.close();
|
|
break;
|
|
|
|
case 4: // control-d, delete right or EOF
|
|
if (this.cursor === 0 && this.line.length === 0) {
|
|
this.close();
|
|
} else if (this.cursor < this.line.length) {
|
|
this.line = this.line.slice(0, this.cursor)
|
|
+ this.line.slice(this.cursor+1, this.line.length)
|
|
;
|
|
this._refreshLine();
|
|
}
|
|
break;
|
|
|
|
case 13: /* enter */
|
|
var line = this._addHistory();
|
|
this.output.write('\n\x1b[0G');
|
|
stdio.setRawMode(false);
|
|
this.emit('line', line);
|
|
break;
|
|
|
|
case 127: /* backspace */
|
|
case 8: /* ctrl+h */
|
|
if (this.cursor > 0 && this.line.length > 0) {
|
|
this.line = this.line.slice(0, this.cursor-1)
|
|
+ this.line.slice(this.cursor, this.line.length)
|
|
;
|
|
this.cursor--;
|
|
this._refreshLine();
|
|
}
|
|
break;
|
|
|
|
case 21: /* Ctrl+u, delete the whole line. */
|
|
this.cursor = 0;
|
|
this.line = '';
|
|
this._refreshLine();
|
|
break;
|
|
|
|
case 11: /* Ctrl+k, delete from current to end of line. */
|
|
this.line = this.line.slice(0, this.cursor);
|
|
this._refreshLine();
|
|
break;
|
|
|
|
case 1: /* Ctrl+a, go to the start of the line */
|
|
this.cursor = 0;
|
|
this._refreshLine();
|
|
break;
|
|
|
|
case 5: /* ctrl+e, go to the end of the line */
|
|
this.cursor = this.line.length;
|
|
this._refreshLine();
|
|
break;
|
|
|
|
case 2: // control-b, back one character
|
|
if (this.cursor > 0) {
|
|
this.cursor--;
|
|
this._refreshLine();
|
|
}
|
|
break;
|
|
|
|
case 6: // control-f, forward one character
|
|
if (this.cursor != this.line.length) {
|
|
this.cursor++;
|
|
this._refreshLine();
|
|
}
|
|
break;
|
|
|
|
case 14: // control-n, next history item
|
|
this._historyNext();
|
|
break;
|
|
|
|
case 9: // tab, completion
|
|
if (this.completer) {
|
|
this._tabComplete();
|
|
}
|
|
break;
|
|
|
|
case 16: // control-p, previous history item
|
|
this._historyPrev();
|
|
break;
|
|
|
|
case 26: /* ctrl+z */
|
|
process.kill(process.pid, "SIGTSTP");
|
|
return;
|
|
|
|
case 27: /* escape sequence */
|
|
var next_word, next_non_word, previous_word, previous_non_word;
|
|
if (b[1] === 98 && this.cursor > 0) { // meta-b - backward word
|
|
previous_word = this.line.slice(0, this.cursor)
|
|
.split('').reverse().join('')
|
|
.search(/\w/);
|
|
if (previous_word !== -1) {
|
|
previous_non_word = this.line.slice(0, this.cursor - previous_word)
|
|
.split('').reverse().join('')
|
|
.search(/\W/);
|
|
if (previous_non_word !== -1) {
|
|
this.cursor -= previous_word + previous_non_word;
|
|
this._refreshLine();
|
|
break;
|
|
}
|
|
}
|
|
this.cursor = 0;
|
|
this._refreshLine();
|
|
} else if (b[1] === 102 && this.cursor < this.line.length) { // meta-f - forward word
|
|
next_word = this.line.slice(this.cursor, this.line.length)
|
|
.search(/\w/);
|
|
if (next_word !== -1) {
|
|
next_non_word = this.line.slice(this.cursor + next_word, this.line.length)
|
|
.search(/\W/);
|
|
if (next_non_word !== -1) {
|
|
this.cursor += next_word + next_non_word;
|
|
this._refreshLine();
|
|
break;
|
|
}
|
|
}
|
|
this.cursor = this.line.length;
|
|
this._refreshLine();
|
|
} else if (b[1] === 91 && b[2] === 68) { // left arrow
|
|
if (this.cursor > 0) {
|
|
this.cursor--;
|
|
this.output.write('\x1b[0D');
|
|
}
|
|
} else if (b[1] === 91 && b[2] === 67) { // right arrow
|
|
if (this.cursor != this.line.length) {
|
|
this.cursor++;
|
|
this.output.write('\x1b[0C');
|
|
}
|
|
} else if ((b[1] === 91 && b[2] === 72) ||
|
|
(b[1] === 79 && b[2] === 72) ||
|
|
(b[1] === 91 && b[2] === 55)) { // home
|
|
this.cursor = 0;
|
|
this._refreshLine();
|
|
} else if ((b[1] === 91 && b[2] === 70) ||
|
|
(b[1] === 79 && b[2] === 70) ||
|
|
(b[1] === 91 && b[2] === 56)) { // end
|
|
this.cursor = this.line.length;
|
|
this._refreshLine();
|
|
} else if (b[1] === 91 && b[2] === 65) { // up arrow
|
|
this._historyPrev();
|
|
} else if (b[1] === 91 && b[2] === 66) { // down arrow
|
|
this._historyNext();
|
|
} else if (b[1] === 91 && b[2] === 51 && this.cursor < this.line.length) { // delete right
|
|
this.line = this.line.slice(0, this.cursor) +
|
|
this.line.slice(this.cursor+1, this.line.length);
|
|
this._refreshLine();
|
|
}
|
|
break;
|
|
|
|
default:
|
|
var c = b.toString('utf8');
|
|
var lines = c.split(/\r\n|\n|\r/);
|
|
for (var i = 0; i < lines.length; i++) {
|
|
if (i > 0) {
|
|
this._ttyWrite(new Buffer([13]));
|
|
}
|
|
this._insertString(lines[i]);
|
|
}
|
|
break;
|
|
}
|
|
};
|
|
|
|
exports.Interface = Interface;
|
|
|