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
|
/* NSC -- new Scala compiler
* Copyright 2002-2007 LAMP/EPFL
* @author Martin Odersky
*/
// $Id$
package scala.tools.nsc.reporters
import java.io.{BufferedReader, InputStreamReader, IOException, PrintWriter}
import compat.StringBuilder
import scala.tools.nsc.util.{FakePos, Position}
/**
* This class implements a Reporter that displays messages on a text
* console.
*/
class ConsoleReporter(val settings: Settings, reader: BufferedReader, writer: PrintWriter) extends AbstractReporter {
/** Whether a short file name should be displayed before errors */
var shortname: Boolean = false
private def label(severity: Severity): String = severity match {
case ERROR => "error"
case WARNING => "warning"
case INFO => null
}
private def clabel(severity : Severity) = {
val label0 = label(severity)
if (label0 eq null) "" else label0 + ": "
}
def this(settings: Settings) =
this(settings, Console.in, new PrintWriter(Console.err, true))
/** Returns the number of errors issued totally as a string.
*
* @param severity ...
* @return ...
*/
private def getCountString(severity: Severity): String =
getCountString0(count(severity), label(severity))
/** Returns a string meaning "n elements".
*
* @param n ...
* @param elements ...
* @return ...
*/
private def getCountString0(n: Int, elements: String): String =
n match {
case 0 => "no " + elements + "s"
case 1 => "one " + elements
case 2 => "two " + elements + "s"
case 3 => "three " + elements + "s"
case 4 => "four " + elements + "s"
case _ => "" + n + " " + elements + "s"
}
/** Prints the message. */
def printMessage(msg: String) = writer.println(msg)
/** Prints the message with the given position indication. */
def printMessage(posIn: Position, msg: String): Unit =
if (posIn ne null) {
val pos = posIn.inUltimateSource
val buf = new StringBuilder(msg)
buf.insert(0, " ")
if (pos.line != Position.NOLINE)
buf.insert(0, ":" + pos.line + ":")
pos match {
case FakePos(msg) =>
buf.insert(0, msg)
case _ =>
val file = pos.source.file
buf.insert(0, if (shortname) file.name else file.path)
}
printMessage(buf.toString())
printSourceLine(pos)
} else
printMessage(msg)
def print(pos: Position, msg: String, severity: Severity) =
printMessage(pos, clabel(severity) + msg)
/**
* @param pos ...
*/
def printSourceLine(pos: Position) = if ((pos ne null) && pos.offset != Position.NOPOS) {
printMessage(pos.lineContent.stripLineEnd)
printColumnMarker(pos)
}
/** Prints the column marker of the given position.
*
* @param pos ...
*/
def printColumnMarker(pos: Position) = if (pos ne null) {
val buffer = new StringBuilder(pos.column)
var i = 1
while (i < pos.column) {
buffer.append(' ')
i = i + 1
}
if (pos.column > 0) buffer.append('^')
printMessage(buffer.toString())
}
/** Prints the number of errors and warnings if their are non-zero. */
def printSummary() = {
if (warnings > 0) printMessage(getCountString(WARNING) + " found")
if ( errors > 0) printMessage(getCountString(ERROR ) + " found")
}
def display(pos: Position, msg: String, severity: Severity): Unit = {
incr(severity)
print(pos, msg, severity)
}
def displayPrompt: Unit = try {
var continue = true
while (continue) {
writer.print("r)esume, a)bort: ")
writer.flush()
var line = reader.readLine()
if (line ne null) {
line = line.toLowerCase()
if ("abort".startsWith(line))
throw new Error("user abort")
if ("resume".startsWith(line)) continue = false
}
}
} catch {
case ex: IOException => {
ex.printStackTrace()
throw new Error("input read error")
}
}
}
|
