var EscapeStore = require('./escape-store');
var EXPRESSION_NAME = 'expression';
var EXPRESSION_START = '(';
var EXPRESSION_END = ')';
var EXPRESSION_PREFIX = EXPRESSION_NAME + EXPRESSION_START;
var BODY_START = '{';
var BODY_END = '}';
var lineBreak = require('os').EOL;
function findEnd(data, start) {
var end = start + EXPRESSION_NAME.length;
var level = 0;
var quoted = false;
var braced = false;
while (true) {
var current = data[end++];
if (quoted) {
quoted = current != '\'' && current != '"';
} else {
quoted = current == '\'' || current == '"';
if (current == EXPRESSION_START)
level++;
if (current == EXPRESSION_END)
level--;
if (current == BODY_START)
braced = true;
if (current == BODY_END && !braced && level == 1) {
end--;
level--;
}
}
if (level === 0 && current == EXPRESSION_END)
break;
if (!current) {
end = data.substring(0, end).lastIndexOf(BODY_END);
break;
}
}
return end;
}
function ExpressionsProcessor(saveWaypoints) {
this.expressions = new EscapeStore('EXPRESSION');
this.saveWaypoints = saveWaypoints;
}
ExpressionsProcessor.prototype.escape = function (data) {
var nextStart = 0;
var nextEnd = 0;
var cursor = 0;
var tempData = [];
var indent = 0;
var breaksCount;
var lastBreakAt;
var newIndent;
var saveWaypoints = this.saveWaypoints;
for (; nextEnd < data.length;) {
nextStart = data.indexOf(EXPRESSION_PREFIX, nextEnd);
if (nextStart == -1)
break;
nextEnd = findEnd(data, nextStart);
var expression = data.substring(nextStart, nextEnd);
if (saveWaypoints) {
breaksCount = expression.split(lineBreak).length - 1;
lastBreakAt = expression.lastIndexOf(lineBreak);
newIndent = lastBreakAt > 0 ?
expression.substring(lastBreakAt + lineBreak.length).length :
indent + expression.length;
}
var metadata = saveWaypoints ? [breaksCount, newIndent] : null;
var placeholder = this.expressions.store(expression, metadata);
tempData.push(data.substring(cursor, nextStart));
tempData.push(placeholder);
if (saveWaypoints)
indent = newIndent + 1;
cursor = nextEnd;
}
return tempData.length > 0 ?
tempData.join('') + data.substring(cursor, data.length) :
data;
};
ExpressionsProcessor.prototype.restore = function (data) {
var tempData = [];
var cursor = 0;
for (; cursor < data.length;) {
var nextMatch = this.expressions.nextMatch(data, cursor);
if (nextMatch.start < 0)
break;
tempData.push(data.substring(cursor, nextMatch.start));
var comment = this.expressions.restore(nextMatch.match);
tempData.push(comment);
cursor = nextMatch.end;
}
return tempData.length > 0 ?
tempData.join('') + data.substring(cursor, data.length) :
data;
};
module.exports = ExpressionsProcessor;
# |
Change |
User |
Description |
Committed |
|
#1
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23539 |
jenbottom |
Adding the basic code for ember test appk, created with 'ember new' command |
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