'use strict';
/**
* Merge two attribute objects giving precedence
* to values in object `b`. Classes are special-cased
* allowing for arrays and merging/joining appropriately
* resulting in a string.
*
* @param {Object} a
* @param {Object} b
* @return {Object} a
* @api private
*/
exports.merge = function merge(a, b) {
if (arguments.length === 1) {
var attrs = a[0];
for (var i = 1; i < a.length; i++) {
attrs = merge(attrs, a[i]);
}
return attrs;
}
var ac = a['class'];
var bc = b['class'];
if (ac || bc) {
ac = ac || [];
bc = bc || [];
if (!Array.isArray(ac)) ac = [ac];
if (!Array.isArray(bc)) bc = [bc];
a['class'] = ac.concat(bc).filter(nulls);
}
for (var key in b) {
if (key != 'class') {
a[key] = b[key];
}
}
return a;
};
/**
* Filter null `val`s.
*
* @param {*} val
* @return {Boolean}
* @api private
*/
function nulls(val) {
return val != null && val !== '';
}
/**
* join array as classes.
*
* @param {*} val
* @return {String}
*/
exports.joinClasses = joinClasses;
function joinClasses(val) {
return (Array.isArray(val) ? val.map(joinClasses) :
(val && typeof val === 'object') ? Object.keys(val).filter(function (key) { return val[key]; }) :
[val]).filter(nulls).join(' ');
}
/**
* Render the given classes.
*
* @param {Array} classes
* @param {Array.<Boolean>} escaped
* @return {String}
*/
exports.cls = function cls(classes, escaped) {
var buf = [];
for (var i = 0; i < classes.length; i++) {
if (escaped && escaped[i]) {
buf.push(exports.escape(joinClasses([classes[i]])));
} else {
buf.push(joinClasses(classes[i]));
}
}
var text = joinClasses(buf);
if (text.length) {
return ' class="' + text + '"';
} else {
return '';
}
};
exports.style = function (val) {
if (val && typeof val === 'object') {
return Object.keys(val).map(function (style) {
return style + ':' + val[style];
}).join(';');
} else {
return val;
}
};
/**
* Render the given attribute.
*
* @param {String} key
* @param {String} val
* @param {Boolean} escaped
* @param {Boolean} terse
* @return {String}
*/
exports.attr = function attr(key, val, escaped, terse) {
if (key === 'style') {
val = exports.style(val);
}
if ('boolean' == typeof val || null == val) {
if (val) {
return ' ' + (terse ? key : key + '="' + key + '"');
} else {
return '';
}
} else if (0 == key.indexOf('data') && 'string' != typeof val) {
Iif (JSON.stringify(val).indexOf('&') !== -1) {
console.warn('Since Jade 2.0.0, ampersands (`&`) in data attributes ' +
'will be escaped to `&`');
};
Iif (val && typeof val.toISOString === 'function') {
console.warn('Jade will eliminate the double quotes around dates in ' +
'ISO form after 2.0.0');
}
return ' ' + key + "='" + JSON.stringify(val).replace(/'/g, ''') + "'";
} else if (escaped) {
Iif (val && typeof val.toISOString === 'function') {
console.warn('Jade will stringify dates in ISO form after 2.0.0');
}
return ' ' + key + '="' + exports.escape(val) + '"';
} else {
Iif (val && typeof val.toISOString === 'function') {
console.warn('Jade will stringify dates in ISO form after 2.0.0');
}
return ' ' + key + '="' + val + '"';
}
};
/**
* Render the given attributes object.
*
* @param {Object} obj
* @param {Object} escaped
* @return {String}
*/
exports.attrs = function attrs(obj, terse){
var buf = [];
var keys = Object.keys(obj);
if (keys.length) {
for (var i = 0; i < keys.length; ++i) {
var key = keys[i]
, val = obj[key];
if ('class' == key) {
if (val = joinClasses(val)) {
buf.push(' ' + key + '="' + val + '"');
}
} else {
buf.push(exports.attr(key, val, false, terse));
}
}
}
return buf.join('');
};
/**
* Escape the given string of `html`.
*
* @param {String} html
* @return {String}
* @api private
*/
exports.escape = function escape(html){
var result = String(html)
.replace(/&/g, '&')
.replace(/</g, '<')
.replace(/>/g, '>')
.replace(/"/g, '"');
if (result === '' + html) return html;
else return result;
};
/**
* Re-throw the given `err` in context to the
* the jade in `filename` at the given `lineno`.
*
* @param {Error} err
* @param {String} filename
* @param {String} lineno
* @api private
*/
exports.rethrow = function rethrow(err, filename, lineno, str){
if (!(err instanceof Error)) throw err;
if ((typeof window != 'undefined' || !filename) && !str) {
err.message += ' on line ' + lineno;
throw err;
}
try {
str = str || require('fs').readFileSync(filename, 'utf8')
} catch (ex) {
rethrow(err, null, lineno)
}
var context = 3
, lines = str.split('\n')
, start = Math.max(lineno - context, 0)
, end = Math.min(lines.length, lineno + context);
// Error context
var context = lines.slice(start, end).map(function(line, i){
var curr = i + start + 1;
return (curr == lineno ? ' > ' : ' ')
+ curr
+ '| '
+ line;
}).join('\n');
// Alter exception message
err.path = filename;
err.message = (filename || 'Jade') + ':' + lineno
+ '\n' + context + '\n\n' + err.message;
throw err;
};
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