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104 lines
3.0 KiB
JavaScript
104 lines
3.0 KiB
JavaScript
/**
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* Copyright 2013 Facebook, Inc.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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/*global exports:true*/
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"use strict";
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var Syntax = require('esprima-fb').Syntax;
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var utils = require('jstransform/src/utils');
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function renderXJSLiteral(object, state) {
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var value = object.raw;
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utils.catchup(object.range[0], state);
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/*
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This can be used to "annotate spaces" inserted by this transformation,
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so that they can be more easily recognized as such in the final code
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{' '}
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{'\\x20'}
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{(' ')}
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{' '||0}
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{' '||AnyTextYouLike}
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{' '||'AnyTextYouLike'}
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{GlobalVariableWithASpace}
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*/
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var space = "{' '}";
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/*
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· space
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¬ newline
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{expr} = <tag>
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Old whitespace rules:
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{1}··Aaa··Bbb··{2}··{3} → {1}·Aaa··Bbb·{2}{3}
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{1}¬¬Aaa¬¬Bbb¬¬{2}¬¬{3} → {1}·Aaa·Bbb·{2}{3}
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New whitespace rules:
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{1}··Aaa··Bbb··{2}··{3} → {1}··Aaa··Bbb··{2}··{3}
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{1}¬¬Aaa¬¬Bbb¬¬{2}¬¬{3} → {1}Aaa·Bbb{2}{3}
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Required transformation:
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{1}··{2} = {1}··{2} → {1}{2}
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{1}··Aaa··{2} = {1}··Aaa··{2} → {1}·Aaa·{2}
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{1}¬¬Aaa¬¬{2} = {1}Aaa{2} → {1}·Aaa·{2}
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*/
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// {1}··{2} = {1}··{2} → {1}{2}
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value = value.replace(/^[ \t]+$/, '');
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// {1}··Aaa··{2} = {1}··Aaa··{2} → {1}·Aaa·{2}
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value = value.replace(/^[ \t]+([^ \t\r\n])/, " $1");
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value = value.replace(/([^ \t\r\n])[ \t]+$/, "$1 ");
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// {1}¬¬Aaa¬¬{2} = {1}Aaa{2} → {1}·Aaa·{2}
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value = value.replace(/^([ \t]*[\r\n][ \t\r\n]*)([^ \t\r\n].*)/, "$1" + space + "$2");
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value = value.replace(/([^ \t\r\n])([ \t]*[\r\n][ \t\r\n]*)$/, "$1" + space + "$2");
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// Rendered whitespace tabs are replaced with spaces
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value = value.replace(/[^ \t\r\n][ ]*[\t][ \t]*[^ \t\r\n]/, function(match) {
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return match.replace(/\t/g, ' ');
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});
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utils.append(value, state);
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utils.move(object.range[1], state);
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}
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function renderXJSExpressionContainer(
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traverse, object,
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isNotAfterLiteral,
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isNotBeforeLiteral,
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path, state)
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{
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utils.catchup(object.range[0], state);
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// Unbox the previously required {' '}-workaround
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var raw = object.expression.raw;
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var isSpace = (raw === "' '" || raw === '" "');
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if (isNotAfterLiteral && isNotBeforeLiteral && isSpace) {
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utils.append(' ', state);
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utils.move(object.range[1], state);
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} else {
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utils.catchup(object.range[1], state);
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}
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return false;
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}
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exports.renderXJSExpressionContainer = renderXJSExpressionContainer;
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exports.renderXJSLiteral = renderXJSLiteral;
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