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replace leading, trailing, empty whitespace with white list
values(\n,\t, ,\r)
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@@ -1,43 +1,38 @@ | ||
/* eslint-env node */ | ||
'use strict'; | ||
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// below are the encoded values of ' ', '\n' and '\t' to avoid collapsing multiple into a single whitespace. | ||
const matchHorizontalTABAndNewLineBegin = /^(%20|%09|%0A)+/; | ||
const matchHorizontalTABAndNewLineEnd = /(%20|%09|%0A)+$/; | ||
const WHITESPACE = /^(%20|%09|%0A)+$/; | ||
const leadingWhiteSpace = /^[ \t\r\n]+/; | ||
const trailingWhiteSpace = /[ \t\r\n]+$/; | ||
const WHITESPACE = /^[ \t\r\n]+$/; | ||
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const isWhitespaceTextNode = function(node) { | ||
return node && node.type === 'TextNode' && WHITESPACE.test(encodeURIComponent(node.chars)); | ||
}; | ||
function isWhitespaceTextNode(node) { | ||
return node && node.type === 'TextNode' && WHITESPACE.test(node.chars); | ||
} | ||
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const hasLeadingOrTrailingWhiteSpace = function(chars) { | ||
chars = encodeURIComponent(chars); | ||
return matchHorizontalTABAndNewLineBegin.test(chars) || matchHorizontalTABAndNewLineEnd.test(chars); | ||
}; | ||
function hasLeadingOrTrailingWhiteSpace(chars) { | ||
return leadingWhiteSpace.test(chars) || trailingWhiteSpace.test(chars); | ||
} | ||
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const stripWhiteSpace = function(chars) { | ||
function stripWhiteSpace(chars) { | ||
/* | ||
Replacing multiple ' '(leading/trailing), '\n' and '\t' into a single whitespace. | ||
Replacing multiple ' ', '\n' and '\t'(leading/trailing) into a single whitespace. | ||
*/ | ||
chars = encodeURIComponent(chars || ''); | ||
chars = chars.replace(matchHorizontalTABAndNewLineBegin, ' ') | ||
.replace(matchHorizontalTABAndNewLineEnd, ' '); | ||
return decodeURIComponent(chars); | ||
}; | ||
chars = chars || ''; | ||
return chars.replace(leadingWhiteSpace, ' ').replace(trailingWhiteSpace, ' '); | ||
} | ||
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const stripNoMinifyBlocks = function(nodes) { | ||
function stripNoMinifyBlocks(nodes) { | ||
return nodes.map(node => { | ||
if (node.type === 'BlockStatement' && node.path.original === 'no-minify') { | ||
return node.program.body; | ||
} | ||
return node; | ||
}).reduce((a, b) => a.concat(b), []); | ||
}; | ||
} | ||
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module.exports = { | ||
stripWhiteSpace, | ||
isWhitespaceTextNode, | ||
WHITESPACE, | ||
stripNoMinifyBlocks, | ||
hasLeadingOrTrailingWhiteSpace | ||
}; |