mirror of
https://github.com/ls125781003/tvboxtg.git
synced 2025-10-26 02:52:25 +00:00
607 lines
22 KiB
JavaScript
607 lines
22 KiB
JavaScript
/*!
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* Jinja Templating for JavaScript v0.1.8
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* https://github.com/sstur/jinja-js
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*
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* This is a slimmed-down Jinja2 implementation [http://jinja.pocoo.org/]
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*
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* In the interest of simplicity, it deviates from Jinja2 as follows:
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* - Line statements, cycle, super, macro tags and block nesting are not implemented
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* - auto escapes html by default (the filter is "html" not "e")
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* - Only "html" and "safe" filters are built in
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* - Filters are not valid in expressions; `foo|length > 1` is not valid
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* - Expression Tests (`if num is odd`) not implemented (`is` translates to `==` and `isnot` to `!=`)
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*
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* Notes:
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* - if property is not found, but method '_get' exists, it will be called with the property name (and cached)
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* - `{% for n in obj %}` iterates the object's keys; get the value with `{% for n in obj %}{{ obj[n] }}{% endfor %}`
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* - subscript notation `a[0]` takes literals or simple variables but not `a[item.key]`
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* - `.2` is not a valid number literal; use `0.2`
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*
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*/
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/*global require, exports, module, define */
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(function(global, factory) {
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typeof exports === 'object' && typeof module !== 'undefined' ? factory(exports) :
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typeof define === 'function' && define.amd ? define(['exports'], factory) :
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(global = typeof globalThis !== 'undefined' ? globalThis : global || self, factory(global.jinja = {}));
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})(this, (function(jinja) {
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"use strict";
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var STRINGS = /'(\\.|[^'])*'|"(\\.|[^"'"])*"/g;
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var IDENTS_AND_NUMS = /([$_a-z][$\w]*)|([+-]?\d+(\.\d+)?)/g;
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var NUMBER = /^[+-]?\d+(\.\d+)?$/;
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//non-primitive literals (array and object literals)
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var NON_PRIMITIVES = /\[[@#~](,[@#~])*\]|\[\]|\{([@i]:[@#~])(,[@i]:[@#~])*\}|\{\}/g;
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//bare identifiers such as variables and in object literals: {foo: 'value'}
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var IDENTIFIERS = /[$_a-z][$\w]*/ig;
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var VARIABLES = /i(\.i|\[[@#i]\])*/g;
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var ACCESSOR = /(\.i|\[[@#i]\])/g;
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var OPERATORS = /(===?|!==?|>=?|<=?|&&|\|\||[+\-\*\/%])/g;
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//extended (english) operators
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var EOPS = /(^|[^$\w])(and|or|not|is|isnot)([^$\w]|$)/g;
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var LEADING_SPACE = /^\s+/;
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var TRAILING_SPACE = /\s+$/;
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var START_TOKEN = /\{\{\{|\{\{|\{%|\{#/;
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var TAGS = {
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'{{{': /^('(\\.|[^'])*'|"(\\.|[^"'"])*"|.)+?\}\}\}/,
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'{{': /^('(\\.|[^'])*'|"(\\.|[^"'"])*"|.)+?\}\}/,
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'{%': /^('(\\.|[^'])*'|"(\\.|[^"'"])*"|.)+?%\}/,
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'{#': /^('(\\.|[^'])*'|"(\\.|[^"'"])*"|.)+?#\}/
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};
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var delimeters = {
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'{%': 'directive',
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'{{': 'output',
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'{#': 'comment'
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};
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var operators = {
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and: '&&',
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or: '||',
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not: '!',
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is: '==',
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isnot: '!='
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};
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var constants = {
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'true': true,
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'false': false,
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'null': null
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};
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function Parser() {
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this.nest = [];
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this.compiled = [];
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this.childBlocks = 0;
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this.parentBlocks = 0;
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this.isSilent = false;
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}
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Parser.prototype.push = function(line) {
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if (!this.isSilent) {
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this.compiled.push(line);
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}
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};
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Parser.prototype.parse = function(src) {
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this.tokenize(src);
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return this.compiled;
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};
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Parser.prototype.tokenize = function(src) {
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var lastEnd = 0,
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parser = this,
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trimLeading = false;
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matchAll(src, START_TOKEN, function(open, index, src) {
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//here we match the rest of the src against a regex for this tag
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var match = src.slice(index + open.length).match(TAGS[open]);
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match = (match ? match[0] : '');
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//here we sub out strings so we don't get false matches
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var simplified = match.replace(STRINGS, '@');
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//if we don't have a close tag or there is a nested open tag
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if (!match || ~simplified.indexOf(open)) {
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return index + 1;
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}
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var inner = match.slice(0, 0 - open.length);
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//check for white-space collapse syntax
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if (inner.charAt(0) === '-') var wsCollapseLeft = true;
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if (inner.slice(-1) === '-') var wsCollapseRight = true;
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inner = inner.replace(/^-|-$/g, '').trim();
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//if we're in raw mode and we are not looking at an "endraw" tag, move along
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if (parser.rawMode && (open + inner) !== '{%endraw') {
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return index + 1;
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}
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var text = src.slice(lastEnd, index);
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lastEnd = index + open.length + match.length;
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if (trimLeading) text = trimLeft(text);
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if (wsCollapseLeft) text = trimRight(text);
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if (wsCollapseRight) trimLeading = true;
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if (open === '{{{') {
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//liquid-style: make {{{x}}} => {{x|safe}}
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open = '{{';
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inner += '|safe';
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}
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parser.textHandler(text);
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parser.tokenHandler(open, inner);
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});
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var text = src.slice(lastEnd);
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if (trimLeading) text = trimLeft(text);
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this.textHandler(text);
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};
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Parser.prototype.textHandler = function(text) {
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this.push('write(' + JSON.stringify(text) + ');');
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};
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Parser.prototype.tokenHandler = function(open, inner) {
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var type = delimeters[open];
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if (type === 'directive') {
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this.compileTag(inner);
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} else if (type === 'output') {
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var extracted = this.extractEnt(inner, STRINGS, '@');
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//replace || operators with ~
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extracted.src = extracted.src.replace(/\|\|/g, '~').split('|');
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//put back || operators
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extracted.src = extracted.src.map(function(part) {
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return part.split('~').join('||');
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});
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var parts = this.injectEnt(extracted, '@');
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if (parts.length > 1) {
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var filters = parts.slice(1).map(this.parseFilter.bind(this));
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this.push('filter(' + this.parseExpr(parts[0]) + ',' + filters.join(',') + ');');
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} else {
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this.push('filter(' + this.parseExpr(parts[0]) + ');');
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}
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}
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};
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Parser.prototype.compileTag = function(str) {
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var directive = str.split(' ')[0];
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var handler = tagHandlers[directive];
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if (!handler) {
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throw new Error('Invalid tag: ' + str);
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}
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handler.call(this, str.slice(directive.length).trim());
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};
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Parser.prototype.parseFilter = function(src) {
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src = src.trim();
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var match = src.match(/[:(]/);
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var i = match ? match.index : -1;
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if (i < 0) return JSON.stringify([src]);
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var name = src.slice(0, i);
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var args = src.charAt(i) === ':' ? src.slice(i + 1) : src.slice(i + 1, -1);
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args = this.parseExpr(args, {
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terms: true
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});
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return '[' + JSON.stringify(name) + ',' + args + ']';
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};
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Parser.prototype.extractEnt = function(src, regex, placeholder) {
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var subs = [],
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isFunc = typeof placeholder == 'function';
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src = src.replace(regex, function(str) {
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var replacement = isFunc ? placeholder(str) : placeholder;
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if (replacement) {
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subs.push(str);
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return replacement;
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}
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return str;
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});
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return {
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src: src,
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subs: subs
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};
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};
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Parser.prototype.injectEnt = function(extracted, placeholder) {
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var src = extracted.src,
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subs = extracted.subs,
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isArr = Array.isArray(src);
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var arr = (isArr) ? src : [src];
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var re = new RegExp('[' + placeholder + ']', 'g'),
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i = 0;
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arr.forEach(function(src, index) {
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arr[index] = src.replace(re, function() {
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return subs[i++];
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});
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});
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return isArr ? arr : arr[0];
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};
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//replace complex literals without mistaking subscript notation with array literals
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Parser.prototype.replaceComplex = function(s) {
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var parsed = this.extractEnt(s, /i(\.i|\[[@#i]\])+/g, 'v');
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parsed.src = parsed.src.replace(NON_PRIMITIVES, '~');
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return this.injectEnt(parsed, 'v');
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};
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//parse expression containing literals (including objects/arrays) and variables (including dot and subscript notation)
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//valid expressions: `a + 1 > b.c or c == null`, `a and b[1] != c`, `(a < b) or (c < d and e)`, 'a || [1]`
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Parser.prototype.parseExpr = function(src, opts) {
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opts = opts || {};
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//extract string literals -> @
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var parsed1 = this.extractEnt(src, STRINGS, '@');
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//note: this will catch {not: 1} and a.is; could we replace temporarily and then check adjacent chars?
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parsed1.src = parsed1.src.replace(EOPS, function(s, before, op, after) {
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return (op in operators) ? before + operators[op] + after : s;
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});
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//sub out non-string literals (numbers/true/false/null) -> #
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// the distinction is necessary because @ can be object identifiers, # cannot
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var parsed2 = this.extractEnt(parsed1.src, IDENTS_AND_NUMS, function(s) {
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return (s in constants || NUMBER.test(s)) ? '#' : null;
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});
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//sub out object/variable identifiers -> i
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var parsed3 = this.extractEnt(parsed2.src, IDENTIFIERS, 'i');
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//remove white-space
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parsed3.src = parsed3.src.replace(/\s+/g, '');
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//the rest of this is simply to boil the expression down and check validity
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var simplified = parsed3.src;
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//sub out complex literals (objects/arrays) -> ~
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// the distinction is necessary because @ and # can be subscripts but ~ cannot
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while (simplified !== (simplified = this.replaceComplex(simplified)));
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//now @ represents strings, # represents other primitives and ~ represents non-primitives
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//replace complex variables (those with dot/subscript accessors) -> v
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while (simplified !== (simplified = simplified.replace(/i(\.i|\[[@#i]\])+/, 'v')));
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//empty subscript or complex variables in subscript, are not permitted
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simplified = simplified.replace(/[iv]\[v?\]/g, 'x');
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//sub in "i" for @ and # and ~ and v (now "i" represents all literals, variables and identifiers)
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simplified = simplified.replace(/[@#~v]/g, 'i');
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//sub out operators
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simplified = simplified.replace(OPERATORS, '%');
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//allow 'not' unary operator
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simplified = simplified.replace(/!+[i]/g, 'i');
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var terms = opts.terms ? simplified.split(',') : [simplified];
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terms.forEach(function(term) {
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//simplify logical grouping
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while (term !== (term = term.replace(/\(i(%i)*\)/g, 'i')));
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if (!term.match(/^i(%i)*/)) {
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throw new Error('Invalid expression: ' + src + " " + term);
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}
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});
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parsed3.src = parsed3.src.replace(VARIABLES, this.parseVar.bind(this));
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parsed2.src = this.injectEnt(parsed3, 'i');
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parsed1.src = this.injectEnt(parsed2, '#');
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return this.injectEnt(parsed1, '@');
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};
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Parser.prototype.parseVar = function(src) {
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var args = Array.prototype.slice.call(arguments);
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var str = args.pop(),
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index = args.pop();
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//quote bare object identifiers (might be a reserved word like {while: 1})
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if (src === 'i' && str.charAt(index + 1) === ':') {
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return '"i"';
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}
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var parts = ['"i"'];
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src.replace(ACCESSOR, function(part) {
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if (part === '.i') {
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parts.push('"i"');
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} else if (part === '[i]') {
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parts.push('get("i")');
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} else {
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parts.push(part.slice(1, -1));
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}
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});
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return 'get(' + parts.join(',') + ')';
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};
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//escapes a name to be used as a javascript identifier
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Parser.prototype.escName = function(str) {
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return str.replace(/\W/g, function(s) {
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return '$' + s.charCodeAt(0).toString(16);
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});
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};
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Parser.prototype.parseQuoted = function(str) {
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if (str.charAt(0) === "'") {
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str = str.slice(1, -1).replace(/\\.|"/, function(s) {
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if (s === "\\'") return "'";
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return s.charAt(0) === '\\' ? s : ('\\' + s);
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});
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str = '"' + str + '"';
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}
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//todo: try/catch or deal with invalid characters (linebreaks, control characters)
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return JSON.parse(str);
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};
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//the context 'this' inside tagHandlers is the parser instance
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var tagHandlers = {
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'if': function(expr) {
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this.push('if (' + this.parseExpr(expr) + ') {');
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this.nest.unshift('if');
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},
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'else': function() {
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if (this.nest[0] === 'for') {
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this.push('}, function() {');
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} else {
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this.push('} else {');
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}
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},
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'elseif': function(expr) {
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this.push('} else if (' + this.parseExpr(expr) + ') {');
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},
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'endif': function() {
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this.nest.shift();
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this.push('}');
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},
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'for': function(str) {
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var i = str.indexOf(' in ');
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var name = str.slice(0, i).trim();
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var expr = str.slice(i + 4).trim();
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this.push('each(' + this.parseExpr(expr) + ',' + JSON.stringify(name) + ',function() {');
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this.nest.unshift('for');
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},
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'endfor': function() {
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this.nest.shift();
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this.push('});');
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},
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'raw': function() {
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this.rawMode = true;
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},
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'endraw': function() {
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this.rawMode = false;
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},
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'set': function(stmt) {
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var i = stmt.indexOf('=');
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var name = stmt.slice(0, i).trim();
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var expr = stmt.slice(i + 1).trim();
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this.push('set(' + JSON.stringify(name) + ',' + this.parseExpr(expr) + ');');
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},
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'block': function(name) {
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if (this.isParent) {
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++this.parentBlocks;
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var blockName = 'block_' + (this.escName(name) || this.parentBlocks);
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this.push('block(typeof ' + blockName + ' == "function" ? ' + blockName + ' : function() {');
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} else if (this.hasParent) {
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this.isSilent = false;
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++this.childBlocks;
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blockName = 'block_' + (this.escName(name) || this.childBlocks);
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this.push('function ' + blockName + '() {');
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}
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this.nest.unshift('block');
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},
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'endblock': function() {
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this.nest.shift();
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if (this.isParent) {
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this.push('});');
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} else if (this.hasParent) {
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this.push('}');
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this.isSilent = true;
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}
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},
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'extends': function(name) {
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name = this.parseQuoted(name);
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var parentSrc = this.readTemplateFile(name);
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this.isParent = true;
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this.tokenize(parentSrc);
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this.isParent = false;
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this.hasParent = true;
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//silence output until we enter a child block
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this.isSilent = true;
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},
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'include': function(name) {
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name = this.parseQuoted(name);
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var incSrc = this.readTemplateFile(name);
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this.isInclude = true;
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this.tokenize(incSrc);
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this.isInclude = false;
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}
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};
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//liquid style
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tagHandlers.assign = tagHandlers.set;
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//python/django style
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tagHandlers.elif = tagHandlers.elseif;
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var getRuntime = function runtime(data, opts) {
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var defaults = {
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autoEscape: 'toJson'
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};
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var _toString = Object.prototype.toString;
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var _hasOwnProperty = Object.prototype.hasOwnProperty;
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var getKeys = Object.keys || function(obj) {
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var keys = [];
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for (var n in obj)
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if (_hasOwnProperty.call(obj, n)) keys.push(n);
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return keys;
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};
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var isArray = Array.isArray || function(obj) {
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return _toString.call(obj) === '[object Array]';
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};
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var create = Object.create || function(obj) {
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function F() {}
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F.prototype = obj;
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return new F();
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};
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var toString = function(val) {
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if (val == null) return '';
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return (typeof val.toString == 'function') ? val.toString() : _toString.call(val);
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};
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var extend = function(dest, src) {
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var keys = getKeys(src);
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for (var i = 0, len = keys.length; i < len; i++) {
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var key = keys[i];
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dest[key] = src[key];
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}
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return dest;
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};
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//get a value, lexically, starting in current context; a.b -> get("a","b")
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var get = function() {
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var val, n = arguments[0],
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c = stack.length;
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while (c--) {
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val = stack[c][n];
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if (typeof val != 'undefined') break;
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}
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for (var i = 1, len = arguments.length; i < len; i++) {
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if (val == null) continue;
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n = arguments[i];
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val = (_hasOwnProperty.call(val, n)) ? val[n] : (typeof val._get == 'function' ? (val[n] = val._get(n)) : null);
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}
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return (val == null) ? '' : val;
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};
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var set = function(n, val) {
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stack[stack.length - 1][n] = val;
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};
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var push = function(ctx) {
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stack.push(ctx || {});
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};
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var pop = function() {
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stack.pop();
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};
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var write = function(str) {
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output.push(str);
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};
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var filter = function(val) {
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for (var i = 1, len = arguments.length; i < len; i++) {
|
|
var arr = arguments[i],
|
|
name = arr[0],
|
|
filter = filters[name];
|
|
if (filter) {
|
|
arr[0] = val;
|
|
//now arr looks like [val, arg1, arg2]
|
|
val = filter.apply(data, arr);
|
|
} else {
|
|
throw new Error('Invalid filter: ' + name);
|
|
}
|
|
}
|
|
if (opts.autoEscape && name !== opts.autoEscape && name !== 'safe') {
|
|
//auto escape if not explicitly safe or already escaped
|
|
val = filters[opts.autoEscape].call(data, val);
|
|
}
|
|
output.push(val);
|
|
};
|
|
var each = function(obj, loopvar, fn1, fn2) {
|
|
if (obj == null) return;
|
|
var arr = isArray(obj) ? obj : getKeys(obj),
|
|
len = arr.length;
|
|
var ctx = {
|
|
loop: {
|
|
length: len,
|
|
first: arr[0],
|
|
last: arr[len - 1]
|
|
}
|
|
};
|
|
push(ctx);
|
|
for (var i = 0; i < len; i++) {
|
|
extend(ctx.loop, {
|
|
index: i + 1,
|
|
index0: i
|
|
});
|
|
fn1(ctx[loopvar] = arr[i]);
|
|
}
|
|
if (len === 0 && fn2) fn2();
|
|
pop();
|
|
};
|
|
var block = function(fn) {
|
|
push();
|
|
fn();
|
|
pop();
|
|
};
|
|
var render = function() {
|
|
return output.join('');
|
|
};
|
|
data = data || {};
|
|
opts = extend(defaults, opts || {});
|
|
var filters = extend({
|
|
html: function(val) {
|
|
return toString(val)
|
|
.split('&').join('&')
|
|
.split('<').join('<')
|
|
.split('>').join('>')
|
|
.split('"').join('"');
|
|
},
|
|
safe: function(val) {
|
|
return val;
|
|
},
|
|
toJson: function(val) {
|
|
if (typeof val === 'object') {
|
|
return JSON.stringify(val);
|
|
}
|
|
return toString(val);
|
|
}
|
|
}, opts.filters || {});
|
|
var stack = [create(data || {})],
|
|
output = [];
|
|
return {
|
|
get: get,
|
|
set: set,
|
|
push: push,
|
|
pop: pop,
|
|
write: write,
|
|
filter: filter,
|
|
each: each,
|
|
block: block,
|
|
render: render
|
|
};
|
|
};
|
|
|
|
var runtime;
|
|
|
|
jinja.compile = function(markup, opts) {
|
|
opts = opts || {};
|
|
var parser = new Parser();
|
|
parser.readTemplateFile = this.readTemplateFile;
|
|
var code = [];
|
|
code.push('function render($) {');
|
|
code.push('var get = $.get, set = $.set, push = $.push, pop = $.pop, write = $.write, filter = $.filter, each = $.each, block = $.block;');
|
|
code.push.apply(code, parser.parse(markup));
|
|
code.push('return $.render();');
|
|
code.push('}');
|
|
code = code.join('\n');
|
|
if (opts.runtime === false) {
|
|
var fn = new Function('data', 'options', 'return (' + code + ')(runtime(data, options))');
|
|
} else {
|
|
runtime = runtime || (runtime = getRuntime.toString());
|
|
fn = new Function('data', 'options', 'return (' + code + ')((' + runtime + ')(data, options))');
|
|
}
|
|
return {
|
|
render: fn
|
|
};
|
|
};
|
|
|
|
jinja.render = function(markup, data, opts) {
|
|
var tmpl = jinja.compile(markup);
|
|
return tmpl.render(data, opts);
|
|
};
|
|
|
|
jinja.templateFiles = [];
|
|
|
|
jinja.readTemplateFile = function(name) {
|
|
var templateFiles = this.templateFiles || [];
|
|
var templateFile = templateFiles[name];
|
|
if (templateFile == null) {
|
|
throw new Error('Template file not found: ' + name);
|
|
}
|
|
return templateFile;
|
|
};
|
|
|
|
|
|
/*!
|
|
* Helpers
|
|
*/
|
|
|
|
function trimLeft(str) {
|
|
return str.replace(LEADING_SPACE, '');
|
|
}
|
|
|
|
function trimRight(str) {
|
|
return str.replace(TRAILING_SPACE, '');
|
|
}
|
|
|
|
function matchAll(str, reg, fn) {
|
|
//copy as global
|
|
reg = new RegExp(reg.source, 'g' + (reg.ignoreCase ? 'i' : '') + (reg.multiline ? 'm' : ''));
|
|
var match;
|
|
while ((match = reg.exec(str))) {
|
|
var result = fn(match[0], match.index, str);
|
|
if (typeof result == 'number') {
|
|
reg.lastIndex = result;
|
|
}
|
|
}
|
|
}
|
|
})); |