/lib/tput.js
JavaScript | 2927 lines | 2155 code | 322 blank | 450 comment | 335 complexity | f497dafb416543d5a446cf1f62bc7ffb MD5 | raw file
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- /**
- * tput.js - parse and compile terminfo caps to javascript.
- * Copyright (c) 2013, Christopher Jeffrey (MIT License)
- * https://github.com/chjj/blessed
- */
- // Resources:
- // $ man term
- // $ man terminfo
- // http://invisible-island.net/ncurses/man/term.5.html
- // https://en.wikipedia.org/wiki/Terminfo
- // Todo:
- // - xterm's XT (set-title capability?) value should
- // be true (at least tmux thinks it should).
- // It's not parsed as true. Investigate.
- // - Possibly switch to other method of finding the
- // extended data string table: i += h.symOffsetCount * 2;
- /**
- * Modules
- */
- var assert = require('assert')
- , path = require('path')
- , fs = require('fs');
- /**
- * Tput
- */
- function Tput(options) {
- if (!(this instanceof Tput)) {
- return new Tput(options);
- }
- options = options || {};
- if (typeof options === 'string') {
- options = { term: options };
- }
- this.options = options;
- this.terminal = options.term
- || options.terminal
- || process.env.TERM
- || (process.platform === 'win32' ? 'windows-ansi' : 'xterm');
- this.debug = options.debug;
- this.padding = options.padding;
- this.extended = options.extended;
- this.printf = options.printf;
- this.termcap = options.termcap;
- this.terminfoPrefix = options.terminfoPrefix;
- this.terminfoFile = options.terminfoFile;
- this.termcapFile = options.termcapFile;
- if (options.term || options.terminal) {
- this.setup();
- }
- };
- Tput.prototype.setup = function() {
- try {
- if (this.termcap) {
- try {
- this.injectTermcap();
- } catch (e) {
- if (this.debug) throw e;
- this._useInternalCap(this.terminal);
- }
- } else {
- try {
- this.injectTerminfo();
- } catch (e) {
- if (this.debug) throw e;
- this._useInternalInfo(this.terminal);
- }
- }
- } catch (e) {
- // If there was an error, fallback
- // to an internally stored terminfo/cap.
- if (this.debug) throw e;
- this._useXtermInfo();
- }
- };
- Tput.prototype.term = function(is) {
- return this.terminal.indexOf(is) === 0;
- };
- Tput.prototype._debug = function() {
- if (!this.debug) return;
- return console.log.apply(console, arguments);
- };
- /**
- * Fallback
- */
- Tput.prototype._useVt102Cap = function() {
- return this.injectTermcap('vt102');
- };
- Tput.prototype._useXtermCap = function() {
- return this.injectTermcap(__dirname + '/../usr/xterm.termcap');
- };
- Tput.prototype._useXtermInfo = function() {
- return this.injectTerminfo(__dirname + '/../usr/xterm');
- };
- Tput.prototype._useInternalInfo = function(name) {
- name = path.basename(name);
- return this.injectTerminfo(__dirname + '/../usr/' + name);
- };
- Tput.prototype._useInternalCap = function(name) {
- name = path.basename(name);
- return this.injectTermcap(__dirname + '/../usr/' + name + '.termcap');
- };
- /**
- * Terminfo
- */
- Tput.ipaths = [
- process.env.TERMINFO || '',
- (process.env.TERMINFO_DIRS || '').split(':'),
- (process.env.HOME || '') + '/.terminfo',
- '/usr/share/terminfo',
- '/usr/share/lib/terminfo',
- '/usr/lib/terminfo',
- '/usr/local/share/terminfo',
- '/usr/local/share/lib/terminfo',
- '/usr/local/lib/terminfo',
- '/usr/local/ncurses/lib/terminfo'
- ];
- Tput.prototype.readTerminfo = function(term) {
- var term = term || this.terminal
- , data
- , file
- , info;
- file = path.normalize(this._prefix(term));
- data = fs.readFileSync(file);
- info = this.parseTerminfo(data, file);
- if (this.debug) {
- this._terminfo = info;
- }
- return info;
- };
- Tput._prefix =
- Tput.prototype._prefix = function(term) {
- // If we have a terminfoFile, or our
- // term looks like a filename, use it.
- if (term) {
- if (~term.indexOf(path.sep)) {
- return term;
- }
- if (this.terminfoFile) {
- return this.terminfoFile;
- }
- }
- var paths = Tput.ipaths.slice()
- , file;
- if (this.terminfoPrefix) {
- paths.unshift(this.terminfoPrefix);
- }
- // Try exact matches.
- file = this._tprefix(paths, term);
- if (file) return file;
- // Try similar matches.
- file = this._tprefix(paths, term, true);
- if (file) return file;
- // Not found.
- throw new Error('Terminfo directory not found.');
- };
- Tput._tprefix =
- Tput.prototype._tprefix = function(prefix, term, soft) {
- if (!prefix) return;
- var file
- , dir
- , ch
- , i
- , sdiff
- , sfile
- , list;
- if (Array.isArray(prefix)) {
- for (i = 0; i < prefix.length; i++) {
- file = this._tprefix(prefix[i], term, soft);
- if (file) return file;
- }
- return;
- }
- var find = function(word) {
- var file, ch;
- file = path.resolve(prefix, word[0]);
- try {
- fs.statSync(file);
- return file;
- } catch (e) {
- ;
- }
- ch = word[0].charCodeAt(0).toString(16);
- if (ch.length < 2) ch = '0' + ch;
- file = path.resolve(prefix, ch);
- try {
- fs.statSync(file);
- return file;
- } catch (e) {
- ;
- }
- };
- if (!term) {
- // Make sure the directory's sub-directories
- // are all one-letter, or hex digits.
- // return find('x') ? prefix : null;
- try {
- dir = fs.readdirSync(prefix).filter(function(file) {
- return file.length !== 1 && !/^[0-9a-fA-F]{2}$/.test(file);
- });
- if (!dir.length) {
- return prefix;
- }
- } catch (e) {
- ;
- }
- return;
- }
- term = path.basename(term);
- dir = find(term);
- if (!dir) return;
- if (soft) {
- try {
- list = fs.readdirSync(dir);
- } catch (e) {
- return;
- }
- list.forEach(function(file) {
- if (file.indexOf(term) === 0) {
- var diff = file.length - term.length;
- if (!sfile || diff < sdiff) {
- sdiff = diff;
- sfile = file;
- }
- }
- });
- return sfile && (soft || sdiff === 0)
- ? path.resolve(dir, sfile)
- : null;
- }
- file = path.resolve(dir, term);
- try {
- fs.statSync(file);
- return file;
- } catch (e) {
- ;
- }
- };
- /**
- * Terminfo Parser
- * All shorts are little-endian
- */
- Tput.prototype.parseTerminfo = function(data, file) {
- var info = {}
- , extended
- , l = data.length
- , i = 0
- , v
- , o;
- var h = info.header = {
- dataSize: data.length,
- headerSize: 12,
- magicNumber: (data[1] << 8) | data[0],
- namesSize: (data[3] << 8) | data[2],
- boolCount: (data[5] << 8) | data[4],
- numCount: (data[7] << 8) | data[6],
- strCount: (data[9] << 8) | data[8],
- strTableSize: (data[11] << 8) | data[10]
- };
- h.total = h.headerSize
- + h.namesSize
- + h.boolCount
- + h.numCount * 2
- + h.strCount * 2
- + h.strTableSize;
- i += h.headerSize;
- // Names Section
- var names = data.toString('ascii', i, i + h.namesSize - 1)
- , parts = names.split('|')
- , name = parts[0]
- , desc = parts.pop();
- info.name = name;
- info.names = parts;
- info.desc = desc;
- info.dir = path.resolve(file, '..', '..');
- info.file = file;
- i += h.namesSize - 1;
- // Names is nul-terminated.
- assert.equal(data[i], 0);
- i++;
- // Booleans Section
- // One byte for each flag
- // Same order as <term.h>
- info.bools = {};
- l = i + h.boolCount;
- o = 0;
- for (; i < l; i++) {
- v = Tput.bools[o++];
- info.bools[v] = data[i] === 1;
- }
- // Null byte in between to make sure numbers begin on an even byte.
- if (i % 2) {
- assert.equal(data[i], 0);
- i++;
- }
- // Numbers Section
- info.numbers = {};
- l = i + h.numCount * 2;
- o = 0;
- for (; i < l; i += 2) {
- v = Tput.numbers[o++];
- if (data[i + 1] === 0377 && data[i] === 0377) {
- info.numbers[v] = -1;
- } else {
- info.numbers[v] = (data[i + 1] << 8) | data[i];
- }
- }
- // Strings Section
- info.strings = {};
- l = i + h.strCount * 2;
- o = 0;
- for (; i < l; i += 2) {
- v = Tput.strings[o++];
- if (data[i + 1] === 0377 && data[i] === 0377) {
- info.strings[v] = -1;
- } else {
- info.strings[v] = (data[i + 1] << 8) | data[i];
- }
- }
- // String Table
- Object.keys(info.strings).forEach(function(key) {
- if (info.strings[key] === -1) {
- delete info.strings[key];
- return;
- }
- // Workaround: fix an odd bug in the screen-256color terminfo where it tries
- // to set -1, but it appears to have {0xfe, 0xff} instead of {0xff, 0xff}.
- // TODO: Possibly handle errors gracefully below, as well as in the
- // extended info. Also possibly do: `if (info.strings[key] >= data.length)`.
- if (info.strings[key] === 65534) {
- delete info.strings[key];
- return;
- }
- var s = i + info.strings[key]
- , j = s;
- while (data[j]) j++;
- assert(j < data.length);
- info.strings[key] = data.toString('ascii', s, j);
- });
- // Extended Header
- if (this.extended !== false) {
- i--;
- i += h.strTableSize;
- if (i % 2) {
- assert.equal(data[i], 0);
- i++;
- }
- l = data.length;
- if (i < l - 1) {
- try {
- extended = this.parseExtended(data.slice(i));
- } catch (e) {
- if (this.debug) {
- throw e;
- }
- return info;
- }
- info.header.extended = extended.header;
- ['bools', 'numbers', 'strings'].forEach(function(key) {
- merge(info[key], extended[key]);
- });
- }
- }
- return info;
- };
- /**
- * Extended Parsing
- */
- // Some data to help understand:
- // For xterm, non-extended header:
- // { dataSize: 3270,
- // headerSize: 12,
- // magicNumber: 282,
- // namesSize: 48,
- // boolCount: 38,
- // numCount: 15,
- // strCount: 413,
- // strTableSize: 1388,
- // total: 2342 }
- // For xterm, header:
- // Offset: 2342
- // { header:
- // { dataSize: 928,
- // headerSize: 10,
- // boolCount: 2,
- // numCount: 1,
- // strCount: 57,
- // strTableSize: 117,
- // lastStrTableOffset: 680,
- // total: 245 },
- // For xterm, layout:
- // { header: '0 - 10', // length: 10
- // bools: '10 - 12', // length: 2
- // numbers: '12 - 14', // length: 2
- // strings: '14 - 128', // length: 114 (57 short)
- // symoffsets: '128 - 248', // length: 120 (60 short)
- // stringtable: '248 - 612', // length: 364
- // sym: '612 - 928' } // length: 316
- //
- // How lastStrTableOffset works:
- // data.length - h.lastStrTableOffset === 248
- // (sym-offset end, string-table start)
- // 364 + 316 === 680 (lastStrTableOffset)
- // How strTableSize works:
- // h.strCount + [symOffsetCount] === h.strTableSize
- // 57 + 60 === 117 (strTableSize)
- // symOffsetCount doesn't actually exist in the header. it's just implied.
- // Getting the number of sym offsets:
- // h.symOffsetCount = h.strTableSize - h.strCount;
- // h.symOffsetSize = (h.strTableSize - h.strCount) * 2;
- Tput.prototype.parseExtended = function(data) {
- var info = {}
- , l = data.length
- , i = 0;
- var h = info.header = {
- dataSize: data.length,
- headerSize: 10,
- boolCount: (data[i + 1] << 8) | data[i + 0],
- numCount: (data[i + 3] << 8) | data[i + 2],
- strCount: (data[i + 5] << 8) | data[i + 4],
- strTableSize: (data[i + 7] << 8) | data[i + 6],
- lastStrTableOffset: (data[i + 9] << 8) | data[i + 8]
- };
- // h.symOffsetCount = h.strTableSize - h.strCount;
- h.total = h.headerSize
- + h.boolCount
- + h.numCount * 2
- + h.strCount * 2
- + h.strTableSize;
- i += h.headerSize;
- // Booleans Section
- // One byte for each flag
- var _bools = [];
- l = i + h.boolCount;
- for (; i < l; i++) {
- _bools.push(data[i] === 1);
- }
- // Null byte in between to make sure numbers begin on an even byte.
- if (i % 2) {
- assert.equal(data[i], 0);
- i++;
- }
- // Numbers Section
- var _numbers = [];
- l = i + h.numCount * 2;
- for (; i < l; i += 2) {
- if (data[i + 1] === 0377 && data[i] === 0377) {
- _numbers.push(-1);
- } else {
- _numbers.push((data[i + 1] << 8) | data[i]);
- }
- }
- // Strings Section
- var _strings = [];
- l = i + h.strCount * 2;
- for (; i < l; i += 2) {
- if (data[i + 1] === 0377 && data[i] === 0377) {
- _strings.push(-1);
- } else {
- _strings.push((data[i + 1] << 8) | data[i]);
- }
- }
- // Pass over the sym offsets and get to the string table.
- i = data.length - h.lastStrTableOffset;
- // Might be better to do this instead if the file has trailing bytes:
- // i += h.symOffsetCount * 2;
- // String Table
- var high = 0;
- _strings.forEach(function(offset, k) {
- if (offset === -1) {
- _strings[k] = '';
- return;
- }
- var s = i + offset
- , j = s;
- while (data[j]) j++;
- assert(j < data.length);
- // Find out where the string table ends by
- // getting the highest string length.
- if (high < j - i) {
- high = j - i;
- }
- _strings[k] = data.toString('ascii', s, j);
- });
- // Symbol Table
- // Add one to the highest string length because we didn't count \0.
- i += high + 1;
- l = data.length;
- var sym = []
- , j;
- for (; i < l; i++) {
- j = i;
- while (data[j]) j++;
- sym.push(data.toString('ascii', i, j));
- i = j;
- }
- // Identify by name
- j = 0;
- info.bools = {};
- _bools.forEach(function(bool) {
- info.bools[sym[j++]] = bool;
- });
- info.numbers = {};
- _numbers.forEach(function(number) {
- info.numbers[sym[j++]] = number;
- });
- info.strings = {};
- _strings.forEach(function(string) {
- info.strings[sym[j++]] = string;
- });
- // Should be the very last bit of data.
- assert.equal(i, data.length);
- return info;
- };
- Tput.prototype.compileTerminfo = function(term) {
- return this.compile(this.readTerminfo(term));
- };
- Tput.prototype.injectTerminfo = function(term) {
- return this.inject(this.compileTerminfo(term));
- };
- /**
- * Compiler - terminfo cap->javascript
- */
- Tput.prototype.compile = function(info) {
- var self = this;
- if (!info) {
- throw new Error('Terminal not found.');
- }
- this.detectFeatures(info);
- this._debug(info);
- info.all = {};
- info.methods = {};
- ['bools', 'numbers', 'strings'].forEach(function(type) {
- Object.keys(info[type]).forEach(function(key) {
- info.all[key] = info[type][key];
- info.methods[key] = self._compile(info, key, info.all[key]);
- });
- });
- Tput.bools.forEach(function(key) {
- if (info.methods[key] == null) info.methods[key] = false;
- });
- Tput.numbers.forEach(function(key) {
- if (info.methods[key] == null) info.methods[key] = -1;
- });
- Tput.strings.forEach(function(key) {
- if (!info.methods[key]) info.methods[key] = noop;
- });
- Object.keys(info.methods).forEach(function(key) {
- if (!Tput.alias[key]) return;
- Tput.alias[key].forEach(function(alias) {
- info.methods[alias] = info.methods[key];
- });
- // Could just use:
- // Object.keys(Tput.aliasMap).forEach(function(key) {
- // info.methods[key] = info.methods[Tput.aliasMap[key]];
- // });
- });
- return info;
- };
- Tput.prototype.inject = function(info) {
- var self = this
- , methods = info.methods || info;
- Object.keys(methods).forEach(function(key) {
- if (typeof methods[key] !== 'function') {
- self[key] = methods[key];
- return;
- }
- self[key] = function() {
- var args = Array.prototype.slice.call(arguments);
- return methods[key].call(self, args);
- };
- });
- this.info = info;
- this.all = info.all;
- this.methods = info.methods;
- this.bools = info.bools;
- this.numbers = info.numbers;
- this.strings = info.strings;
- if (!~info.names.indexOf(this.terminal)) {
- this.terminal = info.name;
- }
- this.features = info.features;
- Object.keys(info.features).forEach(function(key) {
- self[key] = info.features[key];
- });
- };
- // See:
- // ~/ncurses/ncurses/tinfo/lib_tparm.c
- // ~/ncurses/ncurses/tinfo/comp_scan.c
- Tput.prototype._compile = function(info, key, str) {
- var self = this;
- this._debug('Compiling %s: %s', key, JSON.stringify(str));
- switch (typeof str) {
- case 'boolean':
- return str;
- case 'number':
- return str;
- case 'string':
- break;
- default:
- return noop;
- }
- if (!str) {
- return noop;
- }
- // See:
- // ~/ncurses/progs/tput.c - tput() - L149
- // ~/ncurses/progs/tset.c - set_init() - L992
- if (key === 'init_file' || key === 'reset_file') {
- try {
- // NOTE: Should we consider this code and parse it instead?
- str = fs.readFileSync(str, 'utf8');
- return function() { return str; };
- } catch (e) {
- return noop;
- }
- }
- var tkey = info.name + '.' + key
- , header = 'var v, dyn = {}, stat = {}, stack = [], out = [];'
- , footer = ';return out.join("");'
- , code = header
- , val = str
- , buff = ''
- , cap
- , ch
- , fi
- , then
- , els
- , end;
- function read(regex, no) {
- cap = regex.exec(val);
- if (!cap) return;
- val = val.substring(cap[0].length);
- ch = cap[1];
- if (!no) clear();
- return cap;
- }
- function stmt(c) {
- if (code[code.length-1] === ',') {
- code = code.slice(0, -1);
- }
- code += c;
- }
- function expr(c) {
- code += c + ',';
- }
- function echo(c) {
- if (c === '""') return;
- expr('out.push(' + c + ')');
- }
- function print(c) {
- buff += c;
- }
- function clear() {
- if (buff) {
- echo(JSON.stringify(buff).replace(/\\u00([0-9a-fA-F]{2})/g, '\\x$1'));
- buff = '';
- }
- }
- while (val) {
- // Ignore newlines
- if (read(/^\n /, true)) {
- continue;
- }
- // '^A' -> ^A
- if (read(/^\^(.)/i, true)) {
- if (!(ch >= ' ' && ch <= '~')) {
- this._debug('%s: bad caret char.', tkey);
- // NOTE: ncurses appears to simply
- // continue in this situation, but
- // I could be wrong.
- print(cap[0]);
- continue;
- }
- if (ch === '?') {
- ch = '\x7f';
- } else {
- ch = ch.charCodeAt(0) & 31;
- if (ch === 0) ch = 128;
- ch = String.fromCharCode(ch);
- }
- print(ch);
- continue;
- }
- // 3 octal digits -> character
- if (read(/^\\([0-7]{3})/, true)) {
- print(String.fromCharCode(parseInt(ch, 8)));
- continue;
- }
- // '\e' -> ^[
- // '\n' -> \n
- // '\r' -> \r
- // '\0' -> \200 (special case)
- if (read(/^\\([eEnlrtbfs\^\\,:0]|.)/, true)) {
- switch (ch) {
- case 'e':
- case 'E':
- ch = '\x1b';
- break;
- case 'n':
- ch = '\n';
- break;
- case 'l':
- ch = '\x85';
- break;
- case 'r':
- ch = '\r';
- break;
- case 't':
- ch = '\t';
- break;
- case 'b':
- ch = '\x08';
- break;
- case 'f':
- ch = '\x0c';
- break;
- case 's':
- ch = ' ';
- break;
- case '^':
- ch = '^';
- break;
- case '\\':
- ch = '\\';
- break;
- case ',':
- ch = ',';
- break;
- case ':':
- ch = ':';
- break;
- case '0':
- ch = '\200';
- break;
- case 'a':
- ch = '\x07';
- break;
- default:
- this._debug('%s: bad backslash char.', tkey);
- ch = cap[0];
- break;
- }
- print(ch);
- continue;
- }
- // $<5> -> padding
- // e.g. flash_screen: '\u001b[?5h$<100/>\u001b[?5l',
- if (read(/^\$<(\d+)([*\/]{0,2})>/, true)) {
- if (this.padding) print(cap[0]);
- continue;
- }
- // %% outputs `%'
- if (read(/^%%/, true)) {
- print('%');
- continue;
- }
- // %[[:]flags][width[.precision]][doxXs]
- // as in printf, flags are [-+#] and space. Use a `:' to allow the
- // next character to be a `-' flag, avoiding interpreting "%-" as an
- // operator.
- // %c print pop() like %c in printf
- // Example from screen terminfo:
- // S0: "\u001b(%p1%c"
- // %d print pop()
- // "Print (e.g., "%d") is a special case."
- // %s print pop() like %s in printf
- if (read(/^%((?::-|[+# ]){1,4})?(\d+(?:\.\d+)?)?([doxXsc])/)) {
- if (this.printf || cap[1] || cap[2] || ~'oxX'.indexOf(cap[3])) {
- echo('sprintf("'+ cap[0].replace(':-', '-') + '", stack.pop())');
- } else if (cap[3] === 'c') {
- echo('(v = stack.pop(), isFinite(v) '
- + '? String.fromCharCode(v || 0200) : "")');
- } else {
- echo('stack.pop()');
- }
- continue;
- }
- // %p[1-9]
- // push i'th parameter
- if (read(/^%p([1-9])/)) {
- expr('(stack.push(v = params[' + (ch - 1) + ']), v)');
- continue;
- }
- // %P[a-z]
- // set dynamic variable [a-z] to pop()
- if (read(/^%P([a-z])/)) {
- expr('dyn.' + ch + ' = stack.pop()');
- continue;
- }
- // %g[a-z]
- // get dynamic variable [a-z] and push it
- if (read(/^%g([a-z])/)) {
- expr('(stack.push(dyn.' + ch + '), dyn.' + ch + ')');
- continue;
- }
- // %P[A-Z]
- // set static variable [a-z] to pop()
- if (read(/^%P([A-Z])/)) {
- expr('stat.' + ch + ' = stack.pop()');
- continue;
- }
- // %g[A-Z]
- // get static variable [a-z] and push it
- // The terms "static" and "dynamic" are misleading. Historically,
- // these are simply two different sets of variables, whose values are
- // not reset between calls to tparm. However, that fact is not
- // documented in other implementations. Relying on it will adversely
- // impact portability to other implementations.
- if (read(/^%g([A-Z])/)) {
- expr('(stack.push(v = stat.' + ch + '), v)');
- continue;
- }
- // %'c' char constant c
- // NOTE: These are stored as c chars, exemplified by:
- // cursor_address: "\u001b=%p1%' '%+%c%p2%' '%+%c"
- if (read(/^%'(.)'/)) {
- expr('(stack.push(v = ' + ch.charCodeAt(0) + '), v)');
- continue;
- }
- // %{nn}
- // integer constant nn
- if (read(/^%\{(\d+)\}/)) {
- expr('(stack.push(v = ' + ch + '), v)');
- continue;
- }
- // %l push strlen(pop)
- if (read(/^%l/)) {
- expr('(stack.push(v = (stack.pop() || "").length || 0), v)');
- continue;
- }
- // %+ %- %* %/ %m
- // arithmetic (%m is mod): push(pop() op pop())
- // %& %| %^
- // bit operations (AND, OR and exclusive-OR): push(pop() op pop())
- // %= %> %<
- // logical operations: push(pop() op pop())
- if (read(/^%([+\-*\/m&|\^=><])/)) {
- if (ch === '=') ch = '===';
- else if (ch === 'm') ch = '%';
- expr('(v = stack.pop(),'
- + ' stack.push(v = (stack.pop() ' + ch + ' v) || 0),'
- + ' v)');
- continue;
- }
- // %A, %O
- // logical AND and OR operations (for conditionals)
- if (read(/^%([AO])/)) {
- // Are we supposed to store the result on the stack?
- expr('(stack.push(v = (stack.pop() '
- + (ch === 'A' ? '&&' : '||')
- + ' stack.pop())), v)');
- continue;
- }
- // %! %~
- // unary operations (logical and bit complement): push(op pop())
- if (read(/^%([!~])/)) {
- expr('(stack.push(v = ' + ch + 'stack.pop()), v)');
- continue;
- }
- // %i add 1 to first two parameters (for ANSI terminals)
- if (read(/^%i/)) {
- // Are these supposed to go on the stack in certain situations?
- // ncurses doesn't seem to put them on the stack, but xterm.user6
- // seems to assume they're on the stack for some reason. Could
- // just be a bad terminfo string.
- // user6: "\u001b[%i%d;%dR" - possibly a termcap-style string.
- // expr('(params[0] |= 0, params[1] |= 0, params[0]++, params[1]++)');
- expr('(params[0]++, params[1]++)');
- continue;
- }
- // %? expr %t thenpart %e elsepart %;
- // This forms an if-then-else. The %e elsepart is optional. Usually
- // the %? expr part pushes a value onto the stack, and %t pops it from
- // the stack, testing if it is nonzero (true). If it is zero (false),
- // control passes to the %e (else) part.
- // It is possible to form else-if's a la Algol 68:
- // %? c1 %t b1 %e c2 %t b2 %e c3 %t b3 %e c4 %t b4 %e %;
- // where ci are conditions, bi are bodies.
- if (read(/^%\?/)) {
- end = -1;
- stmt(';if (');
- continue;
- }
- if (read(/^%t/)) {
- end = -1;
- // Technically this is supposed to pop everything off the stack that was
- // pushed onto the stack after the if statement, see man terminfo.
- // Right now, we don't pop anything off. This could cause compat issues.
- // Perhaps implement a "pushed" counter from the time the if statement
- // is added, to the time the then statement is added, and pop off
- // the appropriate number of elements.
- // while (pushed--) expr('stack.pop()');
- stmt(') {');
- continue;
- }
- // Terminfo does elseif's like
- // this: %?[expr]%t...%e[expr]%t...%;
- if (read(/^%e/)) {
- fi = val.indexOf('%?');
- then = val.indexOf('%t');
- els = val.indexOf('%e');
- end = val.indexOf('%;');
- if (end === -1) end = Infinity;
- if (then !== -1 && then < end
- && (fi === -1 || then < fi)
- && (els === -1 || then < els)) {
- stmt('} else if (');
- } else {
- stmt('} else {');
- }
- continue;
- }
- if (read(/^%;/)) {
- end = null;
- stmt('}');
- continue;
- }
- buff += val[0];
- val = val.substring(1);
- }
- // Clear the buffer of any remaining text.
- clear();
- // Some terminfos (I'm looking at you, atari-color), don't end an if
- // statement. It's assumed terminfo will automatically end it for
- // them, because they are a bunch of lazy bastards.
- if (end != null) {
- stmt('}');
- }
- // Add the footer.
- stmt(footer);
- // Optimize and cleanup generated code.
- v = code.slice(header.length, -footer.length);
- if (!v.length) {
- code = 'return "";';
- } else if (v = /^out\.push\(("(?:[^"]|\\")+")\)$/.exec(v)) {
- code = 'return ' + v[1] + ';';
- } else {
- // Turn `(stack.push(v = params[0]), v),out.push(stack.pop())`
- // into `out.push(params[0])`.
- code = code.replace(
- /\(stack\.push\(v = params\[(\d+)\]\), v\),out\.push\(stack\.pop\(\)\)/g,
- 'out.push(params[$1])');
- // Remove unnecessary variable initializations.
- v = code.slice(header.length, -footer.length);
- if (!~v.indexOf('v = ')) code = code.replace('v, ', '');
- if (!~v.indexOf('dyn')) code = code.replace('dyn = {}, ', '');
- if (!~v.indexOf('stat')) code = code.replace('stat = {}, ', '');
- if (!~v.indexOf('stack')) code = code.replace('stack = [], ', '');
- // Turn `var out = [];out.push("foo"),` into `var out = ["foo"];`.
- code = code.replace(
- /out = \[\];out\.push\(("(?:[^"]|\\")+")\),/,
- 'out = [$1];');
- }
- // Terminfos `wyse350-vb`, and `wy350-w`
- // seem to have a few broken strings.
- if (str === '\u001b%?') {
- code = 'return "\\x1b";';
- }
- if (this.debug) {
- v = code
- .replace(/\x1b/g, '\\x1b')
- .replace(/\r/g, '\\r')
- .replace(/\n/g, '\\n');
- process.stdout.write(v + '\n');
- }
- try {
- if (this.options.stringify && code.indexOf('return ') === 0) {
- return new Function('', code)();
- }
- return this.printf || ~code.indexOf('sprintf(')
- ? new Function('sprintf, params', code).bind(null, sprintf)
- : new Function('params', code);
- } catch (e) {
- console.error('');
- console.error('Error on %s:', tkey);
- console.error(JSON.stringify(str));
- console.error('');
- console.error(code.replace(/(,|;)/g, '$1\n'));
- e.stack = e.stack.replace(/\x1b/g, '\\x1b');
- throw e;
- }
- };
- // See: ~/ncurses/ncurses/tinfo/lib_tputs.c
- Tput.prototype._print = function(code, print, done) {
- var print = print || write
- , done = done || noop
- , xon = !this.bools.needs_xon_xoff || this.bools.xon_xoff;
- if (!this.padding) {
- print(code);
- return done();
- }
- var parts = code.split(/(?=\$<[\d.]+[*\/]{0,2}>)/)
- , i = 0;
- (function next() {
- if (i === parts.length) {
- return done();
- }
- var part = parts[i++]
- , padding = /^\$<([\d.]+)([*\/]{0,2})>/.exec(part)
- , amount
- , suffix
- , affect;
- if (!padding) {
- print(part);
- return next();
- }
- part = part.substring(padding[0].length);
- amount = +padding[1];
- suffix = padding[2];
- // A `/' suffix indicates that the padding is mandatory and forces a
- // delay of the given number of milliseconds even on devices for which xon
- // is present to indicate flow control.
- if (xon && !~suffix.indexOf('/')) {
- print(part);
- return next();
- }
- // A `*' indicates that the padding required is proportional to the number
- // of lines affected by the operation, and the amount given is the
- // per-affected-unit padding required. (In the case of insert character,
- // the factor is still the number of lines affected.) Normally, padding is
- // advisory if the device has the xon capability; it is used for cost
- // computation but does not trigger delays.
- if (~suffix.indexOf('*')) {
- if (affect = /\x1b\[(\d+)[LM]/.exec(part)) {
- amount *= +affect[1];
- }
- // The above is a huge workaround. In reality, we need to compile
- // `_print` into the string functions and check the cap name and
- // params.
- // if (cap === 'insert_line' || cap === 'delete_line') {
- // amount *= params[0];
- // }
- // if (cap === 'clear_screen') {
- // amount *= process.stdout.rows;
- // }
- }
- return setTimeout(function() {
- print(part);
- return next();
- }, amount);
- })();
- };
- /**
- * Termcap
- */
- Tput.cpaths = [
- process.env.TERMCAP || '',
- (process.env.TERMPATH || '').split(/[: ]/),
- (process.env.HOME || '') + '/.termcap',
- '/usr/share/misc/termcap',
- '/etc/termcap'
- ];
- Tput.prototype.readTermcap = function(term) {
- var self = this
- , term = term || this.terminal
- , terms
- , term_
- , root
- , paths
- , i;
- // Termcap has a bunch of terminals usually stored in one file/string,
- // so we need to find the one containing our desired terminal.
- if (~term.indexOf(path.sep) && (terms = this._tryCap(path.resolve(term)))) {
- term_ = path.basename(term).split('.')[0];
- if (terms[process.env.TERM]) {
- term = process.env.TERM;
- } else if (terms[term_]) {
- term = term_;
- } else {
- term = Object.keys(terms)[0];
- }
- } else {
- paths = Tput.cpaths.slice();
- if (this.termcapFile) {
- paths.unshift(this.termcapFile);
- }
- paths.push(Tput.termcap);
- terms = this._tryCap(paths, term);
- }
- if (!terms) {
- throw new Error('Cannot find termcap for: ' + term);
- }
- root = terms[term];
- if (this.debug) {
- this._termcap = terms;
- }
- (function tc(term) {
- if (term && term.strings.tc) {
- root.inherits = root.inherits || [];
- root.inherits.push(term.strings.tc);
- var names = terms[term.strings.tc]
- ? terms[term.strings.tc].names
- : [term.strings.tc];
- self._debug('%s inherits from %s.',
- term.names.join('/'), names.join('/'));
- var inherit = tc(terms[term.strings.tc]);
- if (inherit) {
- ['bools', 'numbers', 'strings'].forEach(function(type) {
- merge(term[type], inherit[type]);
- });
- }
- }
- return term;
- })(root);
- // Translate termcap names to terminfo-style names.
- root = this.translateTermcap(root);
- return root;
- };
- Tput.prototype._tryCap = function(file, term) {
- if (!file) return;
- var terms
- , data
- , i;
- if (Array.isArray(file)) {
- for (i = 0; i < file.length; i++) {
- data = this._tryCap(file[i], term);
- if (data) return data;
- }
- return;
- }
- // If the termcap string starts with `/`,
- // ncurses considers it a filename.
- data = file[0] === '/'
- ? tryRead(file)
- : file;
- if (!data) return;
- terms = this.parseTermcap(data, file);
- if (term && !terms[term]) {
- return;
- }
- return terms;
- };
- /**
- * Termcap Parser
- * http://en.wikipedia.org/wiki/Termcap
- * http://www.gnu.org/software
- * /termutils/manual/termcap-1.3/html_mono/termcap.html
- * http://www.gnu.org/software
- * /termutils/manual/termcap-1.3/html_mono/termcap.html#SEC17
- * http://tldp.org/HOWTO/Text-Terminal-HOWTO.html#toc16
- * man termcap
- */
- // Example:
- // vt102|dec vt102:\
- // :do=^J:co#80:li#24:cl=50\E[;H\E[2J:\
- // :le=^H:bs:cm=5\E[%i%d;%dH:nd=2\E[C:up=2\E[A:\
- // :ce=3\E[K:cd=50\E[J:so=2\E[7m:se=2\E[m:us=2\E[4m:ue=2\E[m:\
- // :md=2\E[1m:mr=2\E[7m:mb=2\E[5m:me=2\E[m:is=\E[1;24r\E[24;1H:\
- // :rs=\E>\E[?3l\E[?4l\E[?5l\E[?7h\E[?8h:ks=\E[?1h\E=:ke=\E[?1l\E>:\
- // :ku=\EOA:kd=\EOB:kr=\EOC:kl=\EOD:kb=^H:\
- // :ho=\E[H:k1=\EOP:k2=\EOQ:k3=\EOR:k4=\EOS:pt:sr=5\EM:vt#3:\
- // :sc=\E7:rc=\E8:cs=\E[%i%d;%dr:vs=\E[?7l:ve=\E[?7h:\
- // :mi:al=\E[L:dc=\E[P:dl=\E[M:ei=\E[4l:im=\E[4h:
- Tput.prototype.parseTermcap = function(data, file) {
- var terms = {}
- , parts
- , term
- , entries
- , fields
- , field
- , names
- , i
- , j
- , k;
- // remove escaped newlines
- data = data.replace(/\\\n[ \t]*/g, '');
- // remove comments
- data = data.replace(/^#[^\n]+/gm, '');
- // split entries
- entries = data.trim().split(/\n+/);
- for (i = 0; i < entries.length; i++) {
- fields = entries[i].split(/:+/);
- for (j = 0; j < fields.length; j++) {
- field = fields[j].trim();
- if (!field) continue;
- if (j === 0) {
- names = field.split('|');
- term = {
- name: names[0],
- names: names,
- desc: names.pop(),
- file: ~file.indexOf(path.sep)
- ? path.resolve(file)
- : file,
- termcap: true
- };
- for (k = 0; k < names.length; k++) {
- terms[names[k]] = term;
- }
- term.bools = {};
- term.numbers = {};
- term.strings = {};
- continue;
- }
- if (~field.indexOf('=')) {
- parts = field.split('=');
- term.strings[parts[0]] = parts.slice(1).join('=');
- } else if (~field.indexOf('#')) {
- parts = field.split('#');
- term.numbers[parts[0]] = +parts.slice(1).join('#');
- } else {
- term.bools[field] = true;
- }
- }
- }
- return terms;
- };
- /**
- * Termcap Compiler
- * man termcap
- */
- Tput.prototype.translateTermcap = function(info) {
- var self = this
- , out = {};
- if (!info) return;
- this._debug(info);
- ['name', 'names', 'desc', 'file', 'termcap'].forEach(function(key) {
- out[key] = info[key];
- });
- // Separate aliases for termcap
- var map = (function() {
- var out = {};
- Object.keys(Tput.alias).forEach(function(key) {
- var aliases = Tput.alias[key];
- out[aliases.termcap] = key;
- });
- return out;
- })();
- // Translate termcap cap names to terminfo cap names.
- // e.g. `up` -> `cursor_up`
- ['bools', 'numbers', 'strings'].forEach(function(key) {
- out[key] = {};
- Object.keys(info[key]).forEach(function(cap) {
- if (key === 'strings') {
- info.strings[cap] = self._captoinfo(cap, info.strings[cap], 1);
- }
- if (map[cap]) {
- out[key][map[cap]] = info[key][cap];
- } else {
- // NOTE: Possibly include all termcap names
- // in a separate alias.js file. Some are
- // missing from the terminfo alias.js file
- // which is why we have to do this:
- // See: $ man termcap
- out[key][cap] = info[key][cap];
- }
- });
- });
- return out;
- };
- Tput.prototype.compileTermcap = function(term) {
- return this.compile(this.readTermcap(term));
- };
- Tput.prototype.injectTermcap = function(term) {
- return this.inject(this.compileTermcap(term));
- };
- /**
- * _nc_captoinfo - ported to javascript directly from ncurses.
- * Copyright (c) 1998-2009,2010 Free Software Foundation, Inc.
- * See: ~/ncurses/ncurses/tinfo/captoinfo.c
- *
- * Convert a termcap string to terminfo format.
- * 'cap' is the relevant terminfo capability index.
- * 's' is the string value of the capability.
- * 'parameterized' tells what type of translations to do:
- * % translations if 1
- * pad translations if >=0
- */
- Tput.prototype._captoinfo = function(cap, s, parameterized) {
- var self = this;
- var capstart;
- if (parameterized == null) {
- parameterized = 0;
- }
- var MAX_PUSHED = 16
- , stack = [];
- var stackptr = 0
- , onstack = 0
- , seenm = 0
- , seenn = 0
- , seenr = 0
- , param = 1
- , i = 0
- , out = '';
- function warn() {
- var args = Array.prototype.slice.call(arguments);
- args[0] = 'captoinfo: ' + (args[0] || '');
- return self._debug.apply(self, args);
- }
- function isdigit(ch) {
- return ch >= '0' && ch <= '9';
- }
- function isgraph(ch) {
- return ch > ' ' && ch <= '~';
- }
- // convert a character to a terminfo push
- function cvtchar(sp) {
- var c = '\0'
- , len;
- var j = i;
- switch (sp[j]) {
- case '\\':
- switch (sp[++j]) {
- case '\'':
- case '$':
- case '\\':
- case '%':
- c = sp[j];
- len = 2;
- break;
- case '\0':
- c = '\\';
- len = 1;
- break;
- case '0':
- case '1':
- case '2':
- case '3':
- len = 1;
- while (isdigit(sp[j])) {
- c = String.fromCharCode(8 * c.charCodeAt(0)
- + (sp[j++].charCodeAt(0) - '0'.charCodeAt(0)));
- len++;
- }
- break;
- default:
- c = sp[j];
- len = 2;
- break;
- }
- break;
- case '^':
- c = String.fromCharCode(sp[++j].charCodeAt(0) & 0x1f);
- len = 2;
- break;
- default:
- c = sp[j];
- len = 1;
- }
- if (isgraph(c) && c !== ',' && c !== '\'' && c !== '\\' && c !== ':') {
- out += '%\'';
- out += c;
- out += '\'';
- } else {
- out += '%{';
- if (c.charCodeAt(0) > 99) {
- out += String.fromCharCode(
- (c.charCodeAt(0) / 100 | 0) + '0'.charCodeAt(0));
- }
- if (c.charCodeAt(0) > 9) {
- out += String.fromCharCode(
- (c.charCodeAt(0) / 10 | 0) % 10 + '0'.charCodeAt(0));
- }
- out += String.fromCharCode(
- c.charCodeAt(0) % 10 + '0'.charCodeAt(0));
- out += '}';
- }
- return len;
- }
- // push n copies of param on the terminfo stack if not already there
- function getparm(parm, n) {
- if (seenr) {
- if (parm === 1) {
- parm = 2;
- } else if (parm === 2) {
- parm = 1;
- }
- }
- if (onstack === parm) {
- if (n > 1) {
- warn('string may not be optimal');
- out += '%Pa';
- while (n--) {
- out += '%ga';
- }
- }
- return;
- }
- if (onstack !== 0) {
- push();
- }
- onstack = parm;
- while (n--) {
- out += '%p';
- out += String.fromCharCode('0'.charCodeAt(0) + parm);
- }
- if (seenn && parm < 3) {
- out += '%{96}%^';
- }
- if (seenm && parm < 3) {
- out += '%{127}%^';
- }
- }
- // push onstack on to the stack
- function push() {
- if (stackptr >= MAX_PUSHED) {
- warn('string too complex to convert');
- } else {
- stack[stackptr++] = onstack;
- }
- }
- // pop the top of the stack into onstack
- function pop() {
- if (stackptr === 0) {
- if (onstack === 0) {
- warn('I\'m confused');
- } else {
- onstack = 0;
- }
- } else {
- onstack = stack[--stackptr];
- }
- param++;
- }
- function see03() {
- getparm(param, 1);
- out += '%3d';
- pop();
- }
- function invalid() {
- out += '%';
- i--;
- warn('unknown %% code %s (%#x) in %s',
- JSON.stringify(s[i]), s[i].charCodeAt(0), cap);
- }
- // skip the initial padding (if we haven't been told not to)
- capstart = null;
- if (s == null) s = '';
- if (parameterized >= 0 && isdigit(s[i])) {
- for (capstart = i;; i++) {
- if (!(isdigit(s[i]) || s[i] === '*' || s[i] === '.')) {
- break;
- }
- }
- }
- while (s[i]) {
- switch (s[i]) {
- case '%':
- i++;
- if (parameterized < 1) {
- out += '%';
- break;
- }
- switch (s[i++]) {
- case '%':
- out += '%';
- break;
- case 'r':
- if (seenr++ === 1) {
- warn('saw %%r twice in %s', cap);
- }
- break;
- case 'm':
- if (seenm++ === 1) {
- warn('saw %%m twice in %s', cap);
- }
- break;
- case 'n':
- if (seenn++ === 1) {
- warn('saw %%n twice in %s', cap);
- }
- break;
- case 'i':
- out += '%i';
- break;
- case '6':
- case 'B':
- getparm(param, 1);
- out += '%{10}%/%{16}%*';
- getparm(param, 1);
- out += '%{10}%m%+';
- break;
- case '8':
- case 'D':
- getparm(param, 2);
- out += '%{2}%*%-';
- break;
- case '>':
- getparm(param, 2);
- // %?%{x}%>%t%{y}%+%;
- out += '%?';
- i += cvtchar(s);
- out += '%>%t';
- i += cvtchar(s);
- out += '%+%;';
- break;
- case 'a':
- if ((s[i] === '=' || s[i] === '+' || s[i] === '-'
- || s[i] === '*' || s[i] === '/')
- && (s[i + 1] === 'p' || s[i + 1] === 'c')
- && s[i + 2] !== '\0' && s[i + 2]) {
- var l;
- l = 2;
- if (s[i] !== '=') {
- getparm(param, 1);
- }
- if (s[i + 1] === 'p') {
- getparm(param + s[i + 2].charCodeAt(0) - '@'.charCodeAt(0), 1);
- if (param !== onstack) {
- pop();
- param--;
- }
- l++;
- } else {
- i += 2, l += cvtchar(s), i -= 2;
- }
- switch (s[i]) {
- case '+':
- out += '%+';
- break;
- case '-':
- out += '%-';
- break;
- case '*':
- out += '%*';
- break;
- case '/':
- out += '%/';
- break;
- case '=':
- if (seenr) {
- if (param === 1) {
- onstack = 2;
- } else if (param === 2) {
- onstack = 1;
- } else {
- onstack = param;
- }
- } else {
- onstack = param;
- }
- break;
- }
- i += l;
- break;
- }
- getparm(param, 1);
- i += cvtchar(s);
- out += '%+';
- break;
- case '+':
- getparm(param, 1);
- i += cvtchar(s);
- out += '%+%c';
- pop();
- break;
- case 's':
- // #ifdef WATERLOO
- // i += cvtchar(s);
- // getparm(param, 1);
- // out += '%-';
- // #else
- getparm(param, 1);
- out += '%s';
- pop();
- // #endif /* WATERLOO */
- break;
- case '-':
- i += cvtchar(s);
- getparm(param, 1);
- out += '%-%c';
- pop();
- break;
- case '.':
- getparm(param, 1);
- out += '%c';
- pop();
- break;
- case '0': // not clear any of the historical termcaps did this
- if (s[i] === '3') {
- see03(); // goto
- break;
- } else if (s[i] !== '2') {
- invalid(); // goto
- break;
- }
- // FALLTHRU
- case '2':
- getparm(param, 1);
- out += '%2d';
- pop();
- break;
- case '3':
- see03();
- break;
- case 'd':
- getparm(param, 1);
- out += '%d';
- pop();
- break;
- case 'f':
- param++;
- break;
- case 'b':
- param--;
- break;
- case '\\':
- out += '%\\';
- break;
- default:
- invalid();
- break;
- }
- break;
- // #ifdef REVISIBILIZE
- // case '\\':
- // out += s[i++];
- // out += s[i++];
- // break;
- // case '\n':
- // out += '\\n';
- // i++;
- // break;
- // case '\t':
- // out += '\\t';
- // i++;
- // break;
- // case '\r':
- // out += '\\r';
- // i++;
- // break;
- // case '\200':
- // out += '\\0';
- // i++;
- // break;
- // case '\f':
- // out += '\\f';
- // i++;
- // break;
- // case '\b':
- // out += '\\b';
- // i++;
- // break;
- // case ' ':
- // out += '\\s';
- // i++;
- // break;
- // case '^':
- // out += '\\^';
- // i++;
- // break;
- // case ':':
- // out += '\\:';
- // i++;
- // break;
- // case ',':
- // out += '\\,';
- // i++;
- // break;
- // default:
- // if (s[i] === '\033') {
- // out += '\\E';
- // i++;
- // } else if (s[i].charCodeAt(0) > 0 && s[i].charCodeAt(0) < 32) {
- // out += '^';
- // out += String.fromCharCode(s[i].charCodeAt(0) + '@'.charCodeAt(0));
- // i++;
- // } else if (s[i].charCodeAt(0) <= 0 || s[i].charCodeAt(0) >= 127) {
- // out += '\\';
- // out += String.fromCharCode(
- // ((s[i].charCodeAt(0) & 0300) >> 6) + '0'.charCodeAt(0));
- // out += String.fromCharCode(
- // ((s[i].charCodeAt(0) & 0070) >> 3) + '0'.charCodeAt(0));
- // out += String.fromCharCode(
- // (s[i].charCodeAt(0) & 0007) + '0'.charCodeAt(0));
- // i++;
- // } else {
- // out += s[i++];
- // }
- // break;
- // #else
- default:
- out += s[i++];
- break;
- // #endif
- }
- }
- // Now, if we stripped off some leading padding, add it at the end
- // of the string as mandatory padding.
- if (capstart != null) {
- out += '$<';
- for (i = capstart;; i++) {
- if (isdigit(s[i]) || s[i] === '*' || s[i] === '.') {
- out += s[i];
- } else {
- break;
- }
- }
- out += '/>';
- }
- if (s !== out) {
- warn('Translating %s from %s to %s.',
- cap, JSON.stringify(s), JSON.stringify(out));
- }
- return out;
- };
- /**
- * Compile All Terminfo
- */
- Tput.prototype.getAll = function() {
- var dir = this._prefix()
- , list = asort(fs.readdirSync(dir))
- , infos = [];
- list.forEach(function(letter) {
- var terms = asort(fs.readdirSync(path.resolve(dir, letter)));
- infos.push.apply(infos, terms);
- });
- function asort(obj) {
- return obj.sort(function(a, b) {
- a = a.toLowerCase().charCodeAt(0);
- b = b.toLowerCase().charCodeAt(0);
- return a - b;
- });
- }
- return infos;
- };
- Tput.prototype.compileAll = function(start) {
- var self = this
- , all = {};
- this.getAll().forEach(function(name) {
- if (start && name !== start) {
- return;
- } else {
- start = null;
- }
- all[name] = self.compileTerminfo(name);
- });
- return all;
- };
- /**
- * Detect Features / Quirks
- */
- Tput.prototype.detectFeatures = function(info) {
- var data = this.parseACS(info);
- info.features = {
- unicode: this.detectUnicode(info),
- brokenACS: this.detectBrokenACS(info),
- PCRomSet: this.detectPCRomSet(info),
- magicCookie: this.detectMagicCookie(info),
- padding: this.detectPadding(info),
- setbuf: this.detectSetbuf(info),
- acsc: data.acsc,
- acscr: data.acscr
- };
- return info.features;
- };
- Tput.prototype.detectUnicode = function() {
- var LANG = process.env.LANG
- + ':' + process.env.LANGUAGE
- + ':' + process.env.LC_ALL
- + ':' + process.env.LC_CTYPE;
- return /utf-?8/i.test(LANG);
- };
- // For some reason TERM=linux has smacs/rmacs, but it maps to `^[[11m`
- // and it does not switch to the DEC SCLD character set. What the hell?
- // xterm: \x1b(0, screen: \x0e, linux: \x1b[11m (doesn't work)
- // `man console_codes` says:
- // 11 select null mapping, set display control flag, reset tog‐
- // gle meta flag (ECMA-48 says "first alternate font").
- // See ncurses:
- // ~/ncurses/ncurses/base/lib_set_term.c
- // ~/ncurses/ncurses/tinfo/lib_acs.c
- // ~/ncurses/ncurses/tinfo/tinfo_driver.c
- // ~/ncurses/ncurses/tinfo/lib_setup.c
- Tput.prototype.detectBrokenACS = function(info) {
- // ncurses-compatible env variable.
- if (process.env.NCURSES_NO_UTF8_ACS != null) {
- return true;
- }
- // If the terminal supports unicode, we don't need ACS.
- if (info.numbers['U8'] >= 0) {
- return !!info.numbers['U8'];
- }
- // The linux console is just broken for some reason.
- // Apparently the Linux console does not support ACS,
- // but it does support the PC ROM character set.
- if (info.name === 'linux') {
- return true;
- }
- // PC alternate charset
- // if (acsc.indexOf('+\x10,\x11-\x18.\x190') === 0) {
- if (this.detectPCRomSet(info)) {
- return true;
- }
- // screen termcap is bugged?
- if (info.name.indexOf('screen') == 0
- && process.env.TERMCAP
- && ~process.env.TERMCAP.indexOf('screen')
- && ~process.env.TERMCAP.indexOf('hhII00')) {
- if (~info.strings.enter_alt_charset_mode.indexOf('\016')
- || ~info.strings.enter_alt_charset_mode.indexOf('\017')
- || ~info.strings.set_attributes.indexOf('\016')
- || ~info.strings.set_attributes.indexOf('\017')) {
- return true;
- }
- }
- return false;
- };
- // If enter_pc_charset is the same as enter_alt_charset,
- // the terminal does not support SCLD as ACS.
- // See: ~/ncurses/ncurses/tinfo/lib_acs.c
- Tput.prototype.detectPCRomSet = function(info) {
- var s = info.strings;
- if (s.enter_pc_charset_mode && s.enter_alt_charset_mode
- && s.enter_pc_charset_mode === s.enter_alt_charset_mode
- && s.exit_pc_charset_mode === s.exit_alt_charset_mode) {
- return true;
- }
- return false;
- };
- Tput.prototype.detectMagicCookie = function(info) {
- return process.env.NCURSES_NO_MAGIC_COOKIE == null;
- };
- Tput.prototype.detectPadding = function(info) {
- return process.env.NCURSES_NO_PADDING == null;
- };
- Tput.prototype.detectSetbuf = function(info) {
- return process.env.NCURSES_NO_SETBUF == null;
- };
- …
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