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/**
* Copyright 2013-present, Facebook, Inc.
* All rights reserved.
*
* This source code is licensed under the BSD-style license found in the
* LICENSE file in the root directory of this source tree. An additional grant
* of patent rights can be found in the PATENTS file in the same directory.
*/
/*global exports:true*/
'use strict';
var Syntax = require('esprima-fb').Syntax;
var utils = require('../src/utils');
function commaAfterLastParen(value) {
var state = 'normal';
var commaPos = 0;
for (var i = 0; i < value.length; ++i) {
if (state === 'normal') {
if (value.substr(i, 2) === '//') {
state = 'singleline';
i += 1;
} else if (value.substr(i, 2) === '/*') {
state = 'multiline';
i += 1;
} else if (value.charAt(i).trim() !== '') {
commaPos = i + 1;
}
} else if (state === 'singleline' && value.charAt(i) === '\n') {
state = 'normal';
} else if (state === 'multiline' &&
value.charAt(i) === '*' &&
i + 1 < value.length &&
value.charAt(i + 1) === '/') {
i += 1;
state = 'normal';
}
}
return value.substring(0, commaPos) + ', ' + trimLeft(value.substring(commaPos));
}
function renderJSXLiteral(object, isLast, state, start, end) {
var lines = object.value.split(/\r\n|\n|\r/);
if (start) {
utils.append(start, state);
}
var lastNonEmptyLine = 0;
lines.forEach(function(line, index) {
if (line.match(/[^ \t]/)) {
lastNonEmptyLine = index;
}
});
lines.forEach(function(line, index) {
var isFirstLine = index === 0;
var isLastLine = index === lines.length - 1;
var isLastNonEmptyLine = index === lastNonEmptyLine;
// replace rendered whitespace tabs with spaces
var trimmedLine = line.replace(/\t/g, ' ');
// trim whitespace touching a newline
if (!isFirstLine) {
trimmedLine = trimmedLine.replace(/^[ ]+/, '');
}
if (!isLastLine) {
trimmedLine = trimmedLine.replace(/[ ]+$/, '');
}
if (!isFirstLine) {
utils.append(line.match(/^[ \t]*/)[0], state);
}
if (trimmedLine || isLastNonEmptyLine) {
utils.append(
JSON.stringify(trimmedLine) +
(!isLastNonEmptyLine ? ' + " " +' : ''),
state);
if (isLastNonEmptyLine) {
if (end) {
utils.append(end, state);
}
if (!isLast) {
utils.append(', ', state);
}
}
// only restore tail whitespace if line had literals
if (trimmedLine && !isLastLine) {
utils.append(line.match(/[ \t]*$/)[0], state);
}
}
if (!isLastLine) {
utils.append('\n', state);
}
});
utils.move(object.range[1], state);
}
function renderJSXExpressionContainer(traverse, object, isLast, path, state) {
// Plus 1 to skip `{`.
utils.move(object.range[0] + 1, state);
utils.catchup(object.expression.range[0], state);
traverse(object.expression, path, state);
if (!isLast && object.expression.type !== Syntax.JSXEmptyExpression) {
// If we need to append a comma, make sure to do so after the expression.
utils.catchup(object.expression.range[1], state, trimLeft);
utils.catchup(object.range[1] - 1, state, commaAfterLastParen);
} else {
// Minus 1 to skip `}`.
utils.catchup(object.range[1] - 1, state, trimLeft);
}
utils.move(object.range[1], state);
return false;
}
function quoteAttrName(attr) {
// Quote invalid JS identifiers.
if (!/^[a-z_$][a-z\d_$]*$/i.test(attr)) {
return '"' + attr + '"';
}
return attr;
}
function trimLeft(value) {
return value.replace(/^[ ]+/, '');
}
exports.renderJSXExpressionContainer = renderJSXExpressionContainer;
exports.renderJSXLiteral = renderJSXLiteral;
exports.quoteAttrName = quoteAttrName;
exports.trimLeft = trimLeft;
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