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Diffstat (limited to '')
| -rw-r--r-- | testing/mochitest/MochiKit/Iter.js | 843 |
1 files changed, 843 insertions, 0 deletions
diff --git a/testing/mochitest/MochiKit/Iter.js b/testing/mochitest/MochiKit/Iter.js new file mode 100644 index 0000000000..bb3767de94 --- /dev/null +++ b/testing/mochitest/MochiKit/Iter.js @@ -0,0 +1,843 @@ +/*** + +MochiKit.Iter 1.4 + +See <http://mochikit.com/> for documentation, downloads, license, etc. + +(c) 2005 Bob Ippolito. All rights Reserved. + +***/ + +if (typeof(dojo) != 'undefined') { + dojo.provide('MochiKit.Iter'); + dojo.require('MochiKit.Base'); +} + +if (typeof(JSAN) != 'undefined') { + JSAN.use("MochiKit.Base", []); +} + +try { + if (typeof(MochiKit.Base) == 'undefined') { + throw ""; + } +} catch (e) { + throw "MochiKit.Iter depends on MochiKit.Base!"; +} + +if (typeof(MochiKit.Iter) == 'undefined') { + MochiKit.Iter = {}; +} + +MochiKit.Iter.NAME = "MochiKit.Iter"; +MochiKit.Iter.VERSION = "1.4"; +MochiKit.Base.update(MochiKit.Iter, { + __repr__: function () { + return "[" + this.NAME + " " + this.VERSION + "]"; + }, + toString: function () { + return this.__repr__(); + }, + + /** @id MochiKit.Iter.registerIteratorFactory */ + registerIteratorFactory: function (name, check, iterfactory, /* optional */ override) { + MochiKit.Iter.iteratorRegistry.register(name, check, iterfactory, override); + }, + + /** @id MochiKit.Iter.iter */ + iter: function (iterable, /* optional */ sentinel) { + var self = MochiKit.Iter; + if (arguments.length == 2) { + return self.takewhile( + function (a) { return a != sentinel; }, + iterable + ); + } + if (typeof(iterable.next) == 'function') { + return iterable; + } else if (typeof(iterable.iter) == 'function') { + return iterable.iter(); + /* + } else if (typeof(iterable.__iterator__) == 'function') { + // + // XXX: We can't support JavaScript 1.7 __iterator__ directly + // because of Object.prototype.__iterator__ + // + return iterable.__iterator__(); + */ + } + + try { + return self.iteratorRegistry.match(iterable); + } catch (e) { + var m = MochiKit.Base; + if (e == m.NotFound) { + e = new TypeError(typeof(iterable) + ": " + m.repr(iterable) + " is not iterable"); + } + throw e; + } + }, + + /** @id MochiKit.Iter.count */ + count: function (n) { + if (!n) { + n = 0; + } + var m = MochiKit.Base; + return { + repr: function () { return "count(" + n + ")"; }, + toString: m.forwardCall("repr"), + next: m.counter(n) + }; + }, + + /** @id MochiKit.Iter.cycle */ + cycle: function (p) { + var self = MochiKit.Iter; + var m = MochiKit.Base; + var lst = []; + var iterator = self.iter(p); + return { + repr: function () { return "cycle(...)"; }, + toString: m.forwardCall("repr"), + next: function () { + try { + var rval = iterator.next(); + lst.push(rval); + return rval; + } catch (e) { + if (e != self.StopIteration) { + throw e; + } + if (lst.length === 0) { + this.next = function () { + throw self.StopIteration; + }; + } else { + var i = -1; + this.next = function () { + i = (i + 1) % lst.length; + return lst[i]; + }; + } + return this.next(); + } + } + }; + }, + + /** @id MochiKit.Iter.repeat */ + repeat: function (elem, /* optional */n) { + var m = MochiKit.Base; + if (typeof(n) == 'undefined') { + return { + repr: function () { + return "repeat(" + m.repr(elem) + ")"; + }, + toString: m.forwardCall("repr"), + next: function () { + return elem; + } + }; + } + return { + repr: function () { + return "repeat(" + m.repr(elem) + ", " + n + ")"; + }, + toString: m.forwardCall("repr"), + next: function () { + if (n <= 0) { + throw MochiKit.Iter.StopIteration; + } + n -= 1; + return elem; + } + }; + }, + + /** @id MochiKit.Iter.next */ + next: function (iterator) { + return iterator.next(); + }, + + /** @id MochiKit.Iter.izip */ + izip: function (p, q/*, ...*/) { + var m = MochiKit.Base; + var self = MochiKit.Iter; + var next = self.next; + var iterables = m.map(self.iter, arguments); + return { + repr: function () { return "izip(...)"; }, + toString: m.forwardCall("repr"), + next: function () { return m.map(next, iterables); } + }; + }, + + /** @id MochiKit.Iter.ifilter */ + ifilter: function (pred, seq) { + var m = MochiKit.Base; + seq = MochiKit.Iter.iter(seq); + if (pred === null) { + pred = m.operator.truth; + } + return { + repr: function () { return "ifilter(...)"; }, + toString: m.forwardCall("repr"), + next: function () { + while (true) { + var rval = seq.next(); + if (pred(rval)) { + return rval; + } + } + // mozilla warnings aren't too bright + return undefined; + } + }; + }, + + /** @id MochiKit.Iter.ifilterfalse */ + ifilterfalse: function (pred, seq) { + var m = MochiKit.Base; + seq = MochiKit.Iter.iter(seq); + if (pred === null) { + pred = m.operator.truth; + } + return { + repr: function () { return "ifilterfalse(...)"; }, + toString: m.forwardCall("repr"), + next: function () { + while (true) { + var rval = seq.next(); + if (!pred(rval)) { + return rval; + } + } + // mozilla warnings aren't too bright + return undefined; + } + }; + }, + + /** @id MochiKit.Iter.islice */ + islice: function (seq/*, [start,] stop[, step] */) { + var self = MochiKit.Iter; + var m = MochiKit.Base; + seq = self.iter(seq); + var start = 0; + var stop = 0; + var step = 1; + var i = -1; + if (arguments.length == 2) { + stop = arguments[1]; + } else if (arguments.length == 3) { + start = arguments[1]; + stop = arguments[2]; + } else { + start = arguments[1]; + stop = arguments[2]; + step = arguments[3]; + } + return { + repr: function () { + return "islice(" + ["...", start, stop, step].join(", ") + ")"; + }, + toString: m.forwardCall("repr"), + next: function () { + var rval; + while (i < start) { + rval = seq.next(); + i++; + } + if (start >= stop) { + throw self.StopIteration; + } + start += step; + return rval; + } + }; + }, + + /** @id MochiKit.Iter.imap */ + imap: function (fun, p, q/*, ...*/) { + var m = MochiKit.Base; + var self = MochiKit.Iter; + var iterables = m.map(self.iter, m.extend(null, arguments, 1)); + var map = m.map; + var next = self.next; + return { + repr: function () { return "imap(...)"; }, + toString: m.forwardCall("repr"), + next: function () { + return fun.apply(this, map(next, iterables)); + } + }; + }, + + /** @id MochiKit.Iter.applymap */ + applymap: function (fun, seq, self) { + seq = MochiKit.Iter.iter(seq); + var m = MochiKit.Base; + return { + repr: function () { return "applymap(...)"; }, + toString: m.forwardCall("repr"), + next: function () { + return fun.apply(self, seq.next()); + } + }; + }, + + /** @id MochiKit.Iter.chain */ + chain: function (p, q/*, ...*/) { + // dumb fast path + var self = MochiKit.Iter; + var m = MochiKit.Base; + if (arguments.length == 1) { + return self.iter(arguments[0]); + } + var argiter = m.map(self.iter, arguments); + return { + repr: function () { return "chain(...)"; }, + toString: m.forwardCall("repr"), + next: function () { + while (argiter.length > 1) { + try { + return argiter[0].next(); + } catch (e) { + if (e != self.StopIteration) { + throw e; + } + argiter.shift(); + } + } + if (argiter.length == 1) { + // optimize last element + var arg = argiter.shift(); + this.next = m.bind("next", arg); + return this.next(); + } + throw self.StopIteration; + } + }; + }, + + /** @id MochiKit.Iter.takewhile */ + takewhile: function (pred, seq) { + var self = MochiKit.Iter; + seq = self.iter(seq); + return { + repr: function () { return "takewhile(...)"; }, + toString: MochiKit.Base.forwardCall("repr"), + next: function () { + var rval = seq.next(); + if (!pred(rval)) { + this.next = function () { + throw self.StopIteration; + }; + this.next(); + } + return rval; + } + }; + }, + + /** @id MochiKit.Iter.dropwhile */ + dropwhile: function (pred, seq) { + seq = MochiKit.Iter.iter(seq); + var m = MochiKit.Base; + var bind = m.bind; + return { + "repr": function () { return "dropwhile(...)"; }, + "toString": m.forwardCall("repr"), + "next": function () { + while (true) { + var rval = seq.next(); + if (!pred(rval)) { + break; + } + } + this.next = bind("next", seq); + return rval; + } + }; + }, + + _tee: function (ident, sync, iterable) { + sync.pos[ident] = -1; + var m = MochiKit.Base; + var listMin = m.listMin; + return { + repr: function () { return "tee(" + ident + ", ...)"; }, + toString: m.forwardCall("repr"), + next: function () { + var rval; + var i = sync.pos[ident]; + + if (i == sync.max) { + rval = iterable.next(); + sync.deque.push(rval); + sync.max += 1; + sync.pos[ident] += 1; + } else { + rval = sync.deque[i - sync.min]; + sync.pos[ident] += 1; + if (i == sync.min && listMin(sync.pos) != sync.min) { + sync.min += 1; + sync.deque.shift(); + } + } + return rval; + } + }; + }, + + /** @id MochiKit.Iter.tee */ + tee: function (iterable, n/* = 2 */) { + var rval = []; + var sync = { + "pos": [], + "deque": [], + "max": -1, + "min": -1 + }; + if (arguments.length == 1 || typeof(n) == "undefined" || n === null) { + n = 2; + } + var self = MochiKit.Iter; + iterable = self.iter(iterable); + var _tee = self._tee; + for (var i = 0; i < n; i++) { + rval.push(_tee(i, sync, iterable)); + } + return rval; + }, + + /** @id MochiKit.Iter.list */ + list: function (iterable) { + // Fast-path for Array and Array-like + var m = MochiKit.Base; + if (typeof(iterable.slice) == 'function') { + return iterable.slice(); + } else if (m.isArrayLike(iterable)) { + return m.concat(iterable); + } + + var self = MochiKit.Iter; + iterable = self.iter(iterable); + var rval = []; + try { + while (true) { + rval.push(iterable.next()); + } + } catch (e) { + if (e != self.StopIteration) { + throw e; + } + return rval; + } + // mozilla warnings aren't too bright + return undefined; + }, + + + /** @id MochiKit.Iter.reduce */ + reduce: function (fn, iterable, /* optional */initial) { + var i = 0; + var x = initial; + var self = MochiKit.Iter; + iterable = self.iter(iterable); + if (arguments.length < 3) { + try { + x = iterable.next(); + } catch (e) { + if (e == self.StopIteration) { + e = new TypeError("reduce() of empty sequence with no initial value"); + } + throw e; + } + i++; + } + try { + while (true) { + x = fn(x, iterable.next()); + } + } catch (e) { + if (e != self.StopIteration) { + throw e; + } + } + return x; + }, + + /** @id MochiKit.Iter.range */ + range: function (/* [start,] stop[, step] */) { + var start = 0; + var stop = 0; + var step = 1; + if (arguments.length == 1) { + stop = arguments[0]; + } else if (arguments.length == 2) { + start = arguments[0]; + stop = arguments[1]; + } else if (arguments.length == 3) { + start = arguments[0]; + stop = arguments[1]; + step = arguments[2]; + } else { + throw new TypeError("range() takes 1, 2, or 3 arguments!"); + } + if (step === 0) { + throw new TypeError("range() step must not be 0"); + } + return { + next: function () { + if ((step > 0 && start >= stop) || (step < 0 && start <= stop)) { + throw MochiKit.Iter.StopIteration; + } + var rval = start; + start += step; + return rval; + }, + repr: function () { + return "range(" + [start, stop, step].join(", ") + ")"; + }, + toString: MochiKit.Base.forwardCall("repr") + }; + }, + + /** @id MochiKit.Iter.sum */ + sum: function (iterable, start/* = 0 */) { + if (typeof(start) == "undefined" || start === null) { + start = 0; + } + var x = start; + var self = MochiKit.Iter; + iterable = self.iter(iterable); + try { + while (true) { + x += iterable.next(); + } + } catch (e) { + if (e != self.StopIteration) { + throw e; + } + } + return x; + }, + + /** @id MochiKit.Iter.exhaust */ + exhaust: function (iterable) { + var self = MochiKit.Iter; + iterable = self.iter(iterable); + try { + while (true) { + iterable.next(); + } + } catch (e) { + if (e != self.StopIteration) { + throw e; + } + } + }, + + /** @id MochiKit.Iter.forEach */ + forEach: function (iterable, func, /* optional */self) { + var m = MochiKit.Base; + if (arguments.length > 2) { + func = m.bind(func, self); + } + // fast path for array + if (m.isArrayLike(iterable)) { + try { + for (var i = 0; i < iterable.length; i++) { + func(iterable[i]); + } + } catch (e) { + if (e != MochiKit.Iter.StopIteration) { + throw e; + } + } + } else { + self = MochiKit.Iter; + self.exhaust(self.imap(func, iterable)); + } + }, + + /** @id MochiKit.Iter.every */ + every: function (iterable, func) { + var self = MochiKit.Iter; + try { + self.ifilterfalse(func, iterable).next(); + return false; + } catch (e) { + if (e != self.StopIteration) { + throw e; + } + return true; + } + }, + + /** @id MochiKit.Iter.sorted */ + sorted: function (iterable, /* optional */cmp) { + var rval = MochiKit.Iter.list(iterable); + if (arguments.length == 1) { + cmp = MochiKit.Base.compare; + } + rval.sort(cmp); + return rval; + }, + + /** @id MochiKit.Iter.reversed */ + reversed: function (iterable) { + var rval = MochiKit.Iter.list(iterable); + rval.reverse(); + return rval; + }, + + /** @id MochiKit.Iter.some */ + some: function (iterable, func) { + var self = MochiKit.Iter; + try { + self.ifilter(func, iterable).next(); + return true; + } catch (e) { + if (e != self.StopIteration) { + throw e; + } + return false; + } + }, + + /** @id MochiKit.Iter.iextend */ + iextend: function (lst, iterable) { + if (MochiKit.Base.isArrayLike(iterable)) { + // fast-path for array-like + for (var i = 0; i < iterable.length; i++) { + lst.push(iterable[i]); + } + } else { + var self = MochiKit.Iter; + iterable = self.iter(iterable); + try { + while (true) { + lst.push(iterable.next()); + } + } catch (e) { + if (e != self.StopIteration) { + throw e; + } + } + } + return lst; + }, + + /** @id MochiKit.Iter.groupby */ + groupby: function(iterable, /* optional */ keyfunc) { + var m = MochiKit.Base; + var self = MochiKit.Iter; + if (arguments.length < 2) { + keyfunc = m.operator.identity; + } + iterable = self.iter(iterable); + + // shared + var pk = undefined; + var k = undefined; + var v; + + function fetch() { + v = iterable.next(); + k = keyfunc(v); + }; + + function eat() { + var ret = v; + v = undefined; + return ret; + }; + + var first = true; + var compare = m.compare; + return { + repr: function () { return "groupby(...)"; }, + next: function() { + // iterator-next + + // iterate until meet next group + while (compare(k, pk) === 0) { + fetch(); + if (first) { + first = false; + break; + } + } + pk = k; + return [k, { + next: function() { + // subiterator-next + if (v == undefined) { // Is there something to eat? + fetch(); + } + if (compare(k, pk) !== 0) { + throw self.StopIteration; + } + return eat(); + } + }]; + } + }; + }, + + /** @id MochiKit.Iter.groupby_as_array */ + groupby_as_array: function (iterable, /* optional */ keyfunc) { + var m = MochiKit.Base; + var self = MochiKit.Iter; + if (arguments.length < 2) { + keyfunc = m.operator.identity; + } + + iterable = self.iter(iterable); + var result = []; + var first = true; + var prev_key; + var compare = m.compare; + while (true) { + try { + var value = iterable.next(); + var key = keyfunc(value); + } catch (e) { + if (e == self.StopIteration) { + break; + } + throw e; + } + if (first || compare(key, prev_key) !== 0) { + var values = []; + result.push([key, values]); + } + values.push(value); + first = false; + prev_key = key; + } + return result; + }, + + /** @id MochiKit.Iter.arrayLikeIter */ + arrayLikeIter: function (iterable) { + var i = 0; + return { + repr: function () { return "arrayLikeIter(...)"; }, + toString: MochiKit.Base.forwardCall("repr"), + next: function () { + if (i >= iterable.length) { + throw MochiKit.Iter.StopIteration; + } + return iterable[i++]; + } + }; + }, + + /** @id MochiKit.Iter.hasIterateNext */ + hasIterateNext: function (iterable) { + return (iterable && typeof(iterable.iterateNext) == "function"); + }, + + /** @id MochiKit.Iter.iterateNextIter */ + iterateNextIter: function (iterable) { + return { + repr: function () { return "iterateNextIter(...)"; }, + toString: MochiKit.Base.forwardCall("repr"), + next: function () { + var rval = iterable.iterateNext(); + if (rval === null || rval === undefined) { + throw MochiKit.Iter.StopIteration; + } + return rval; + } + }; + } +}); + + +MochiKit.Iter.EXPORT_OK = [ + "iteratorRegistry", + "arrayLikeIter", + "hasIterateNext", + "iterateNextIter", +]; + +MochiKit.Iter.EXPORT = [ + "StopIteration", + "registerIteratorFactory", + "iter", + "count", + "cycle", + "repeat", + "next", + "izip", + "ifilter", + "ifilterfalse", + "islice", + "imap", + "applymap", + "chain", + "takewhile", + "dropwhile", + "tee", + "list", + "reduce", + "range", + "sum", + "exhaust", + "forEach", + "every", + "sorted", + "reversed", + "some", + "iextend", + "groupby", + "groupby_as_array" +]; + +MochiKit.Iter.__new__ = function () { + var m = MochiKit.Base; + // Re-use StopIteration if exists (e.g. SpiderMonkey) + if (typeof(StopIteration) != "undefined") { + this.StopIteration = StopIteration; + } else { + /** @id MochiKit.Iter.StopIteration */ + this.StopIteration = new m.NamedError("StopIteration"); + } + this.iteratorRegistry = new m.AdapterRegistry(); + // Register the iterator factory for arrays + this.registerIteratorFactory( + "arrayLike", + m.isArrayLike, + this.arrayLikeIter + ); + + this.registerIteratorFactory( + "iterateNext", + this.hasIterateNext, + this.iterateNextIter + ); + + this.EXPORT_TAGS = { + ":common": this.EXPORT, + ":all": m.concat(this.EXPORT, this.EXPORT_OK) + }; + + m.nameFunctions(this); + +}; + +MochiKit.Iter.__new__(); + +// +// XXX: Internet Explorer blows +// +if (MochiKit.__export__) { + reduce = MochiKit.Iter.reduce; +} + +MochiKit.Base._exportSymbols(this, MochiKit.Iter); |