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handlebars

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Handlebars provides the power necessary to let you build semantic templates effectively with no frustration

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'use strict'; exports.__esModule = true; // istanbul ignore next function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { 'default': obj }; } var _visitor = require('./visitor'); var _visitor2 = _interopRequireDefault(_visitor); function WhitespaceControl() { var options = arguments.length <= 0 || arguments[0] === undefined ? {} : arguments[0]; this.options = options; } WhitespaceControl.prototype = new _visitor2['default'](); WhitespaceControl.prototype.Program = function (program) { var doStandalone = !this.options.ignoreStandalone; var isRoot = !this.isRootSeen; this.isRootSeen = true; var body = program.body; for (var i = 0, l = body.length; i < l; i++) { var current = body[i], strip = this.accept(current); if (!strip) { continue; } var _isPrevWhitespace = isPrevWhitespace(body, i, isRoot), _isNextWhitespace = isNextWhitespace(body, i, isRoot), openStandalone = strip.openStandalone && _isPrevWhitespace, closeStandalone = strip.closeStandalone && _isNextWhitespace, inlineStandalone = strip.inlineStandalone && _isPrevWhitespace && _isNextWhitespace; if (strip.close) { omitRight(body, i, true); } if (strip.open) { omitLeft(body, i, true); } if (doStandalone && inlineStandalone) { omitRight(body, i); if (omitLeft(body, i)) { // If we are on a standalone node, save the indent info for partials if (current.type === 'PartialStatement') { // Pull out the whitespace from the final line current.indent = /(?:^|[^ \t])([ \t]+)$/.exec(body[i - 1].original)[1]; } } } if (doStandalone && openStandalone) { omitRight((current.program || current.inverse).body); // Strip out the previous content node if it's whitespace only omitLeft(body, i); } if (doStandalone && closeStandalone) { // Always strip the next node omitRight(body, i); omitLeft((current.inverse || current.program).body); } } return program; }; WhitespaceControl.prototype.BlockStatement = WhitespaceControl.prototype.DecoratorBlock = WhitespaceControl.prototype.PartialBlockStatement = function (block) { this.accept(block.program); this.accept(block.inverse); // Find the inverse program that is involed with whitespace stripping. var program = block.program || block.inverse, inverse = block.program && block.inverse, firstInverse = inverse, lastInverse = inverse; if (inverse && inverse.chained) { firstInverse = inverse.body[0].program; // Walk the inverse chain to find the last inverse that is actually in the chain. while (lastInverse.chained) { lastInverse = lastInverse.body[lastInverse.body.length - 1].program; } } var strip = { open: block.openStrip.open, close: block.closeStrip.close, // Determine the standalone candiacy. Basically flag our content as being possibly standalone // so our parent can determine if we actually are standalone openStandalone: isNextWhitespace(program.body), closeStandalone: isPrevWhitespace((firstInverse || program).body) }; if (block.openStrip.close) { omitRight(program.body, null, true); } if (inverse) { var inverseStrip = block.inverseStrip; if (inverseStrip.open) { omitLeft(program.body, null, true); } if (inverseStrip.close) { omitRight(firstInverse.body, null, true); } if (block.closeStrip.open) { omitLeft(lastInverse.body, null, true); } // Find standalone else statments if (!this.options.ignoreStandalone && isPrevWhitespace(program.body) && isNextWhitespace(firstInverse.body)) { omitLeft(program.body); omitRight(firstInverse.body); } } else if (block.closeStrip.open) { omitLeft(program.body, null, true); } return strip; }; WhitespaceControl.prototype.Decorator = WhitespaceControl.prototype.MustacheStatement = function (mustache) { return mustache.strip; }; WhitespaceControl.prototype.PartialStatement = WhitespaceControl.prototype.CommentStatement = function (node) { /* istanbul ignore next */ var strip = node.strip || {}; return { inlineStandalone: true, open: strip.open, close: strip.close }; }; function isPrevWhitespace(body, i, isRoot) { if (i === undefined) { i = body.length; } // Nodes that end with newlines are considered whitespace (but are special // cased for strip operations) var prev = body[i - 1], sibling = body[i - 2]; if (!prev) { return isRoot; } if (prev.type === 'ContentStatement') { // Matches when the trailing whitespace contains a newline (or, for the // root's first node, is the whole string). See omitLeft for the anchoring. return (sibling || !isRoot ? /(?:^|\S)[^\S\n]*\n\s*$/ : /^\s*$|(?:^|\S)[^\S\n]*\n\s*$/).test(prev.original); } } function isNextWhitespace(body, i, isRoot) { if (i === undefined) { i = -1; } var next = body[i + 1], sibling = body[i + 2]; if (!next) { return isRoot; } if (next.type === 'ContentStatement') { return (sibling || !isRoot ? /^\s*?\r?\n/ : /^\s*?(\r?\n|$)/).test(next.original); } } // Marks the node to the right of the position as omitted. // I.e. {{foo}}' ' will mark the ' ' node as omitted. // // If i is undefined, then the first child will be marked as such. // // If mulitple is truthy then all whitespace will be stripped out until non-whitespace // content is met. function omitRight(body, i, multiple) { var current = body[i == null ? 0 : i + 1]; if (!current || current.type !== 'ContentStatement' || !multiple && current.rightStripped) { return; } var original = current.value; current.value = current.value.replace(multiple ? /^\s+/ : /^[ \t]*\r?\n?/, ''); current.rightStripped = current.value !== original; } // Marks the node to the left of the position as omitted. // I.e. ' '{{foo}} will mark the ' ' node as omitted. // // If i is undefined then the last child will be marked as such. // // If mulitple is truthy then all whitespace will be stripped out until non-whitespace // content is met. function omitLeft(body, i, multiple) { var current = body[i == null ? body.length - 1 : i - 1]; if (!current || current.type !== 'ContentStatement' || !multiple && current.leftStripped) { return; } // We omit the last node if it's whitespace only and not preceded by a non-content node. var original = current.value; // The match must start after a non-whitespace character (or at the start): // a plain /\s+$/ is retried at every position of a whitespace run, which // takes quadratic time on long runs. current.value = current.value.replace(multiple ? /(^|\S)\s+$/ : /(^|[^ \t])[ \t]+$/, '$1'); current.leftStripped = current.value !== original; return current.leftStripped; } exports['default'] = WhitespaceControl; module.exports = exports['default']; //# 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Visitor from './visitor';\n\nfunction WhitespaceControl(options = {}) {\n  this.options = options;\n}\nWhitespaceControl.prototype = new Visitor();\n\nWhitespaceControl.prototype.Program = function(program) {\n  const doStandalone = !this.options.ignoreStandalone;\n\n  let isRoot = !this.isRootSeen;\n  this.isRootSeen = true;\n\n  let body = program.body;\n  for (let i = 0, l = body.length; i < l; i++) {\n    let current = body[i],\n      strip = this.accept(current);\n\n    if (!strip) {\n      continue;\n    }\n\n    let _isPrevWhitespace = isPrevWhitespace(body, i, isRoot),\n      _isNextWhitespace = isNextWhitespace(body, i, isRoot),\n      openStandalone = strip.openStandalone && _isPrevWhitespace,\n      closeStandalone = strip.closeStandalone && _isNextWhitespace,\n      inlineStandalone =\n        strip.inlineStandalone && _isPrevWhitespace && _isNextWhitespace;\n\n    if (strip.close) {\n      omitRight(body, i, true);\n    }\n    if (strip.open) {\n      omitLeft(body, i, true);\n    }\n\n    if (doStandalone && inlineStandalone) {\n      omitRight(body, i);\n\n      if (omitLeft(body, i)) {\n        // If we are on a standalone node, save the indent info for partials\n        if (current.type === 'PartialStatement') {\n          // Pull out the whitespace from the final line\n          current.indent = /(?:^|[^ \\t])([ \\t]+)$/.exec(\n            body[i - 1].original\n          )[1];\n        }\n      }\n    }\n    if (doStandalone && openStandalone) {\n      omitRight((current.program || current.inverse).body);\n\n      // Strip out the previous content node if it's whitespace only\n      omitLeft(body, i);\n    }\n    if (doStandalone && closeStandalone) {\n      // Always strip the next node\n      omitRight(body, i);\n\n      omitLeft((current.inverse || current.program).body);\n    }\n  }\n\n  return program;\n};\n\nWhitespaceControl.prototype.BlockStatement = WhitespaceControl.prototype.DecoratorBlock = WhitespaceControl.prototype.PartialBlockStatement = function(\n  block\n) {\n  this.accept(block.program);\n  this.accept(block.inverse);\n\n  // Find the inverse program that is involed with whitespace stripping.\n  let program = block.program || block.inverse,\n    inverse = block.program && block.inverse,\n    firstInverse = inverse,\n    lastInverse = inverse;\n\n  if (inverse && inverse.chained) {\n    firstInverse = inverse.body[0].program;\n\n    // Walk the inverse chain to find the last inverse that is actually in the chain.\n    while (lastInverse.chained) {\n      lastInverse = lastInverse.body[lastInverse.body.length - 1].program;\n    }\n  }\n\n  let strip = {\n    open: block.openStrip.open,\n    close: block.closeStrip.close,\n\n    // Determine the standalone candiacy. Basically flag our content as being possibly standalone\n    // so our parent can determine if we actually are standalone\n    openStandalone: isNextWhitespace(program.body),\n    closeStandalone: isPrevWhitespace((firstInverse || program).body)\n  };\n\n  if (block.openStrip.close) {\n    omitRight(program.body, null, true);\n  }\n\n  if (inverse) {\n    let inverseStrip = block.inverseStrip;\n\n    if (inverseStrip.open) {\n      omitLeft(program.body, null, true);\n    }\n\n    if (inverseStrip.close) {\n      omitRight(firstInverse.body, null, true);\n    }\n    if (block.closeStrip.open) {\n      omitLeft(lastInverse.body, null, true);\n    }\n\n    // Find standalone else statments\n    if (\n      !this.options.ignoreStandalone &&\n      isPrevWhitespace(program.body) &&\n      isNextWhitespace(firstInverse.body)\n    ) {\n      omitLeft(program.body);\n      omitRight(firstInverse.body);\n    }\n  } else if (block.closeStrip.open) {\n    omitLeft(program.body, null, true);\n  }\n\n  return strip;\n};\n\nWhitespaceControl.prototype.Decorator = WhitespaceControl.prototype.MustacheStatement = function(\n  mustache\n) {\n  return mustache.strip;\n};\n\nWhitespaceControl.prototype.PartialStatement = WhitespaceControl.prototype.CommentStatement = function(\n  node\n) {\n  /* istanbul ignore next */\n  let strip = node.strip || {};\n  return {\n    inlineStandalone: true,\n    open: strip.open,\n    close: strip.close\n  };\n};\n\nfunction isPrevWhitespace(body, i, isRoot) {\n  if (i === undefined) {\n    i = body.length;\n  }\n\n  // Nodes that end with newlines are considered whitespace (but are special\n  // cased for strip operations)\n  let prev = body[i - 1],\n    sibling = body[i - 2];\n  if (!prev) {\n    return isRoot;\n  }\n\n  if (prev.type === 'ContentStatement') {\n    // Matches when the trailing whitespace contains a newline (or, for the\n    // root's first node, is the whole string). See omitLeft for the anchoring.\n    return (sibling || !isRoot\n      ? /(?:^|\\S)[^\\S\\n]*\\n\\s*$/\n      : /^\\s*$|(?:^|\\S)[^\\S\\n]*\\n\\s*$/\n    ).test(prev.original);\n  }\n}\nfunction isNextWhitespace(body, i, isRoot) {\n  if (i === undefined) {\n    i = -1;\n  }\n\n  let next = body[i + 1],\n    sibling = body[i + 2];\n  if (!next) {\n    return isRoot;\n  }\n\n  if (next.type === 'ContentStatement') {\n    return (sibling || !isRoot ? /^\\s*?\\r?\\n/ : /^\\s*?(\\r?\\n|$)/).test(\n      next.original\n    );\n  }\n}\n\n// Marks the node to the right of the position as omitted.\n// I.e. {{foo}}' ' will mark the ' ' node as omitted.\n//\n// If i is undefined, then the first child will be marked as such.\n//\n// If mulitple is truthy then all whitespace will be stripped out until non-whitespace\n// content is met.\nfunction omitRight(body, i, multiple) {\n  let current = body[i == null ? 0 : i + 1];\n  if (\n    !current ||\n    current.type !== 'ContentStatement' ||\n    (!multiple && current.rightStripped)\n  ) {\n    return;\n  }\n\n  let original = current.value;\n  current.value = current.value.replace(\n    multiple ? /^\\s+/ : /^[ \\t]*\\r?\\n?/,\n    ''\n  );\n  current.rightStripped = current.value !== original;\n}\n\n// Marks the node to the left of the position as omitted.\n// I.e. ' '{{foo}} will mark the ' ' node as omitted.\n//\n// If i is undefined then the last child will be marked as such.\n//\n// If mulitple is truthy then all whitespace will be stripped out until non-whitespace\n// content is met.\nfunction omitLeft(body, i, multiple) {\n  let current = body[i == null ? body.length - 1 : i - 1];\n  if (\n    !current ||\n    current.type !== 'ContentStatement' ||\n    (!multiple && current.leftStripped)\n  ) {\n    return;\n  }\n\n  // We omit the last node if it's whitespace only and not preceded by a non-content node.\n  let original = current.value;\n  // The match must start after a non-whitespace character (or at the start):\n  // a plain /\\s+$/ is retried at every position of a whitespace run, which\n  // takes quadratic time on long runs.\n  current.value = current.value.replace(\n    multiple ? /(^|\\S)\\s+$/ : /(^|[^ \\t])[ \\t]+$/,\n    '$1'\n  );\n  current.leftStripped = current.value !== original;\n  return current.leftStripped;\n}\n\nexport default WhitespaceControl;\n"]}