515 lines
10 KiB
JavaScript
515 lines
10 KiB
JavaScript
var dust = {};
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(function(dust) {
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dust.cache = {};
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dust.register = function(name, tmpl) {
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if (!name) return;
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dust.cache[name] = tmpl;
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};
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dust.render = function(name, context, callback) {
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var chunk = new Stub(callback).head;
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dust.load(name, chunk, Context.wrap(context)).end();
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};
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dust.stream = function(name, context) {
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var stream = new Stream();
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dust.nextTick(function() {
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dust.load(name, stream.head, Context.wrap(context)).end();
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});
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return stream;
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};
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dust.renderSource = function(source, context, callback) {
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return dust.compileFn(source)(context, callback);
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};
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dust.compileFn = function(source, name) {
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var tmpl = dust.loadSource(dust.compile(source, name));
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return function(context, callback) {
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var master = callback ? new Stub(callback) : new Stream();
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dust.nextTick(function() {
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tmpl(master.head, Context.wrap(context)).end();
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});
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return master;
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}
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};
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dust.load = function(name, chunk, context) {
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var tmpl = dust.cache[name];
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if (tmpl) {
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return tmpl(chunk, context);
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} else {
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if (dust.onLoad) {
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return chunk.map(function(chunk) {
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dust.onLoad(name, function(err, src) {
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if (err) return chunk.setError(err);
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if (!dust.cache[name]) dust.loadSource(dust.compile(src, name));
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dust.cache[name](chunk, context).end();
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});
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});
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}
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return chunk.setError(new Error("Template Not Found: " + name));
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}
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};
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dust.loadSource = function(source, path) {
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return eval(source);
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};
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if (Array.isArray) {
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dust.isArray = Array.isArray;
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} else {
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dust.isArray = function(arr) {
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return Object.prototype.toString.call(arr) == "[object Array]";
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};
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}
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dust.nextTick = function(callback) {
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setTimeout(callback, 0);
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}
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dust.isEmpty = function(value) {
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if (dust.isArray(value) && !value.length) return true;
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if (value === 0) return false;
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return (!value);
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};
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dust.filter = function(string, auto, filters) {
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if (filters) {
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for (var i=0, len=filters.length; i<len; i++) {
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var name = filters[i];
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if (name === "s") {
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auto = null;
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} else {
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string = dust.filters[name](string);
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}
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}
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}
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if (auto) {
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string = dust.filters[auto](string);
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}
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return string;
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};
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dust.filters = {
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h: function(value) { return dust.escapeHtml(value); },
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j: function(value) { return dust.escapeJs(value); },
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u: encodeURI,
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uc: encodeURIComponent
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}
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function Context(stack, global, blocks) {
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this.stack = stack;
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this.global = global;
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this.blocks = blocks;
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}
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dust.makeBase = function(global) {
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return new Context(new Stack(), global);
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}
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Context.wrap = function(context) {
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if (context instanceof Context) {
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return context;
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}
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return new Context(new Stack(context));
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}
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Context.prototype.get = function(key) {
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var ctx = this.stack, value;
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while(ctx) {
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if (ctx.isObject) {
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value = ctx.head[key];
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if (!(value === undefined)) {
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return value;
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}
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}
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ctx = ctx.tail;
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}
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return this.global ? this.global[key] : undefined;
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};
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Context.prototype.getPath = function(cur, down) {
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var ctx = this.stack,
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len = down.length;
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if (cur && len === 0) return ctx.head;
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if (!ctx.isObject) return undefined;
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ctx = ctx.head;
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var i = 0;
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while(ctx && i < len) {
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ctx = ctx[down[i]];
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i++;
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}
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return ctx;
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};
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Context.prototype.push = function(head, idx, len) {
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return new Context(new Stack(head, this.stack, idx, len), this.global, this.blocks);
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};
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Context.prototype.rebase = function(head) {
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return new Context(new Stack(head), this.global, this.blocks);
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};
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Context.prototype.current = function() {
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return this.stack.head;
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};
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Context.prototype.getBlock = function(key) {
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var blocks = this.blocks;
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if (!blocks) return;
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var len = blocks.length, fn;
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while (len--) {
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fn = blocks[len][key];
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if (fn) return fn;
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}
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}
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Context.prototype.shiftBlocks = function(locals) {
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var blocks = this.blocks;
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if (locals) {
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if (!blocks) {
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newBlocks = [locals];
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} else {
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newBlocks = blocks.concat([locals]);
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}
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return new Context(this.stack, this.global, newBlocks);
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}
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return this;
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}
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function Stack(head, tail, idx, len) {
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this.tail = tail;
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this.isObject = !dust.isArray(head) && head && typeof head === "object";
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this.head = head;
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this.index = idx;
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this.of = len;
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}
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function Stub(callback) {
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this.head = new Chunk(this);
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this.callback = callback;
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this.out = '';
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}
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Stub.prototype.flush = function() {
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var chunk = this.head;
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while (chunk) {
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if (chunk.flushable) {
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this.out += chunk.data;
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} else if (chunk.error) {
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this.callback(chunk.error);
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this.flush = function() {};
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return;
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} else {
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return;
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}
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chunk = chunk.next;
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this.head = chunk;
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}
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this.callback(null, this.out);
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}
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function Stream() {
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this.head = new Chunk(this);
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}
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Stream.prototype.flush = function() {
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var chunk = this.head;
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while(chunk) {
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if (chunk.flushable) {
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this.emit('data', chunk.data);
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} else if (chunk.error) {
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this.emit('error', chunk.error);
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this.flush = function() {};
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return;
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} else {
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return;
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}
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chunk = chunk.next;
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this.head = chunk;
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}
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this.emit('end');
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}
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Stream.prototype.emit = function(type, data) {
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var events = this.events;
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if (events && events[type]) {
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events[type](data);
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}
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}
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Stream.prototype.on = function(type, callback) {
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if (!this.events) {
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this.events = {};
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}
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this.events[type] = callback;
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return this;
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}
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function Chunk(root, next, taps) {
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this.root = root;
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this.next = next;
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this.data = '';
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this.flushable = false;
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this.taps = taps;
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}
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Chunk.prototype.write = function(data) {
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var taps = this.taps;
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if (taps) {
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data = taps.go(data);
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}
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this.data += data;
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return this;
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}
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Chunk.prototype.end = function(data) {
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if (data) {
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this.write(data);
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}
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this.flushable = true;
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this.root.flush();
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return this;
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}
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Chunk.prototype.map = function(callback) {
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var cursor = new Chunk(this.root, this.next, this.taps),
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branch = new Chunk(this.root, cursor, this.taps);
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this.next = branch;
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this.flushable = true;
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callback(branch);
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return cursor;
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}
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Chunk.prototype.tap = function(tap) {
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var taps = this.taps;
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if (taps) {
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this.taps = taps.push(tap);
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} else {
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this.taps = new Tap(tap);
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}
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return this;
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}
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Chunk.prototype.untap = function() {
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this.taps = this.taps.tail;
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return this;
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}
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Chunk.prototype.render = function(body, context) {
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return body(this, context);
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}
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Chunk.prototype.reference = function(elem, context, auto, filters) {
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if (typeof elem === "function") {
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elem = elem(this, context, null, {auto: auto, filters: filters});
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if (elem instanceof Chunk) {
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return elem;
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}
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}
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if (!dust.isEmpty(elem)) {
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return this.write(dust.filter(elem, auto, filters));
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} else {
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return this;
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}
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};
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Chunk.prototype.section = function(elem, context, bodies, params) {
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if (typeof elem === "function") {
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elem = elem(this, context, bodies, params);
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if (elem instanceof Chunk) {
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return elem;
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}
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}
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var body = bodies.block,
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skip = bodies['else'];
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if (params) {
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context = context.push(params);
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}
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if (dust.isArray(elem)) {
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if (body) {
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var len = elem.length, chunk = this;
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for (var i=0; i<len; i++) {
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chunk = body(chunk, context.push(elem[i], i, len));
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}
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return chunk;
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}
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} else if (elem === true) {
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if (body) return body(this, context);
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} else if (elem || elem === 0) {
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if (body) return body(this, context.push(elem));
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} else if (skip) {
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return skip(this, context);
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}
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return this;
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};
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Chunk.prototype.exists = function(elem, context, bodies) {
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var body = bodies.block,
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skip = bodies['else'];
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if (!dust.isEmpty(elem)) {
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if (body) return body(this, context);
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} else if (skip) {
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return skip(this, context);
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}
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return this;
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}
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Chunk.prototype.notexists = function(elem, context, bodies) {
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var body = bodies.block,
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skip = bodies['else'];
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if (dust.isEmpty(elem)) {
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if (body) return body(this, context);
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} else if (skip) {
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return skip(this, context);
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}
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return this;
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}
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Chunk.prototype.block = function(elem, context, bodies) {
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var body = bodies.block;
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if (elem) {
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body = elem;
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}
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if (body) {
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return body(this, context);
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}
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return this;
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};
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Chunk.prototype.partial = function(elem, context) {
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if (typeof elem === "function") {
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return this.capture(elem, context, function(name, chunk) {
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dust.load(name, chunk, context).end();
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});
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}
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return dust.load(elem, this, context);
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};
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Chunk.prototype.helper = function(name, context, bodies, params) {
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return dust.helpers[name](this, context, bodies, params);
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};
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Chunk.prototype.capture = function(body, context, callback) {
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return this.map(function(chunk) {
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var stub = new Stub(function(err, out) {
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if (err) {
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chunk.setError(err);
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} else {
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callback(out, chunk);
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}
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});
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body(stub.head, context).end();
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});
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};
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Chunk.prototype.setError = function(err) {
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this.error = err;
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this.root.flush();
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return this;
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};
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dust.helpers = {
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sep: function(chunk, context, bodies) {
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if (context.stack.index === context.stack.of - 1) {
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return chunk;
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}
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return bodies.block(chunk, context);
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},
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idx: function(chunk, context, bodies) {
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return bodies.block(chunk, context.push(context.stack.index));
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}
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}
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function Tap(head, tail) {
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this.head = head;
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this.tail = tail;
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}
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Tap.prototype.push = function(tap) {
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return new Tap(tap, this);
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};
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Tap.prototype.go = function(value) {
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var tap = this;
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while(tap) {
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value = tap.head(value);
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tap = tap.tail;
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}
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return value;
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};
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var HCHARS = new RegExp(/[&<>\"]/),
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AMP = /&/g,
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LT = /</g,
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GT = />/g,
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QUOT = /\"/g;
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dust.escapeHtml = function(s) {
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if (typeof s === "string") {
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if (!HCHARS.test(s)) {
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return s;
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}
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return s.replace(AMP,'&').replace(LT,'<').replace(GT,'>').replace(QUOT,'"');
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}
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return s;
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};
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var BS = /\\/g,
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CR = /\r/g,
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LS = /\u2028/g,
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PS = /\u2029/g,
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NL = /\n/g,
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LF = /\f/g,
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SQ = /'/g,
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DQ = /"/g,
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TB = /\t/g;
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dust.escapeJs = function(s) {
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if (typeof s === "string") {
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return s
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.replace(BS, '\\\\')
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.replace(DQ, '\\"')
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.replace(SQ, "\\'")
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.replace(CR, '\\r')
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.replace(LS, '\\u2028')
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.replace(PS, '\\u2029')
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.replace(NL, '\\n')
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.replace(LF, '\\f')
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.replace(TB, "\\t");
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}
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return s;
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};
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})(dust);
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if (typeof exports !== "undefined") {
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if (typeof process !== "undefined") {
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require('./server')(dust);
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}
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module.exports = dust;
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}
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