1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
|
/**
* @fileoverview Disallows multiple blank lines.
* implementation adapted from the no-trailing-spaces rule.
* @author Greg Cochard
*/
"use strict";
//------------------------------------------------------------------------------
// Rule Definition
//------------------------------------------------------------------------------
module.exports = {
meta: {
docs: {
description: "disallow multiple empty lines",
category: "Stylistic Issues",
recommended: false
},
fixable: "whitespace",
schema: [
{
type: "object",
properties: {
max: {
type: "integer",
minimum: 0
},
maxEOF: {
type: "integer",
minimum: 0
},
maxBOF: {
type: "integer",
minimum: 0
}
},
required: ["max"],
additionalProperties: false
}
]
},
create: function(context) {
// Use options.max or 2 as default
let max = 2,
maxEOF,
maxBOF;
// store lines that appear empty but really aren't
const notEmpty = [];
if (context.options.length) {
max = context.options[0].max;
maxEOF = typeof context.options[0].maxEOF !== "undefined" ? context.options[0].maxEOF : max;
maxBOF = typeof context.options[0].maxBOF !== "undefined" ? context.options[0].maxBOF : max;
}
const sourceCode = context.getSourceCode();
//--------------------------------------------------------------------------
// Public
//--------------------------------------------------------------------------
return {
TemplateLiteral: function(node) {
let start = node.loc.start.line;
const end = node.loc.end.line;
while (start <= end) {
notEmpty.push(start);
start++;
}
},
"Program:exit": function checkBlankLines(node) {
const lines = sourceCode.lines,
fullLines = sourceCode.text.match(/.*(\r\n|\r|\n|\u2028|\u2029)/g) || [],
linesRangeStart = [];
let firstNonBlankLine = -1,
trimmedLines = [],
blankCounter = 0,
currentLocation,
lastLocation,
firstOfEndingBlankLines,
diff,
rangeStart,
rangeEnd;
/**
* Fix code.
* @param {RuleFixer} fixer - The fixer of this context.
* @returns {Object} The fixing information.
*/
function fix(fixer) {
return fixer.removeRange([rangeStart, rangeEnd]);
}
linesRangeStart.push(0);
lines.forEach(function(str, i) {
const length = i < fullLines.length ? fullLines[i].length : 0,
trimmed = str.trim();
if ((firstNonBlankLine === -1) && (trimmed !== "")) {
firstNonBlankLine = i;
}
linesRangeStart.push(linesRangeStart[linesRangeStart.length - 1] + length);
trimmedLines.push(trimmed);
});
// add the notEmpty lines in there with a placeholder
notEmpty.forEach(function(x, i) {
trimmedLines[i] = x;
});
if (typeof maxEOF === "undefined") {
/*
* Swallow the final newline, as some editors add it
* automatically and we don't want it to cause an issue
*/
if (trimmedLines[trimmedLines.length - 1] === "") {
trimmedLines = trimmedLines.slice(0, -1);
}
firstOfEndingBlankLines = trimmedLines.length;
} else {
// save the number of the first of the last blank lines
firstOfEndingBlankLines = trimmedLines.length;
while (trimmedLines[firstOfEndingBlankLines - 1] === ""
&& firstOfEndingBlankLines > 0) {
firstOfEndingBlankLines--;
}
}
// Aggregate and count blank lines
if (firstNonBlankLine > maxBOF) {
diff = firstNonBlankLine - maxBOF;
rangeStart = linesRangeStart[firstNonBlankLine - diff];
rangeEnd = linesRangeStart[firstNonBlankLine];
context.report({
node: node,
loc: node.loc.start,
message: "Too many blank lines at the beginning of file. Max of " + maxBOF + " allowed.",
fix: fix
});
}
currentLocation = firstNonBlankLine - 1;
lastLocation = currentLocation;
currentLocation = trimmedLines.indexOf("", currentLocation + 1);
while (currentLocation !== -1) {
lastLocation = currentLocation;
currentLocation = trimmedLines.indexOf("", currentLocation + 1);
if (lastLocation === currentLocation - 1) {
blankCounter++;
} else {
const location = {
line: lastLocation + 1,
column: 1
};
if (lastLocation < firstOfEndingBlankLines) {
// within the file, not at the end
if (blankCounter >= max) {
diff = blankCounter - max + 1;
rangeStart = linesRangeStart[location.line - diff];
rangeEnd = linesRangeStart[location.line];
context.report({
node: node,
loc: location,
message: "More than " + max + " blank " + (max === 1 ? "line" : "lines") + " not allowed.",
fix: fix
});
}
} else {
// inside the last blank lines
if (blankCounter > maxEOF) {
diff = blankCounter - maxEOF + 1;
rangeStart = linesRangeStart[location.line - diff];
rangeEnd = linesRangeStart[location.line - 1];
context.report({
node: node,
loc: location,
message: "Too many blank lines at the end of file. Max of " + maxEOF + " allowed.",
fix: fix
});
}
}
// Finally, reset the blank counter
blankCounter = 0;
}
}
}
};
}
};
|
