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/* __ *\
** ________ ___ / / ___ Scala API **
** / __/ __// _ | / / / _ | (c) 2003-2004, LAMP/EPFL **
** __\ \/ /__/ __ |/ /__/ __ | **
** /____/\___/_/ |_/____/_/ | | **
** |/ **
\* */
// $Id$
package scala.tools.nsc.util
object NoPosition extends Position {
def offset = None
def line = None
def column = None
def source = None
}
case class FakePos(msg : String) extends Position {
def offset = None
def line = None
def column = None
def source = None
}
abstract class Position {
def offset : Option[Int]
def line : Option[Int]
def column : Option[Int]
def source : Option[SourceFile]
def lineContent: String =
if (!line.isEmpty && !source.isEmpty) source.get.lineToString(line.get - 1)
else "NO_LINE"
/** Map this position to a position in an original source
* file. If the SourceFile is a normal SourceFile, simply
* return this.
*/
def inUltimateSource = if (!source.isEmpty) source.get.positionInUltimateSource(this)
else this
def dbgString = {
(if (source.isEmpty) "" else "source-" + source.get.path) +
(if (line.isEmpty) "" else "line-" + line.get) +
(if (offset.isEmpty || source.isEmpty) ""
else if (offset.get >= source.get.content.length) "out-of-bounds-" + offset.get
else {
val ret = "offset=" + offset.get;
var add = "";
while (offset.get + add.length < source.get.content.length &&
add.length < 10) add = add + source.get.content(offset.get + add.length());
ret + " c[0..9]=\"" + add + "\"";
})
}
}
case class LinePosition(line0 : Int, val source : Option[SourceFile]) extends Position {
def this(line0 : Int) = this(line0, None)
assert(line0 >= 1)
def offset = None
def column = None
def line = Some(line0)
}
case class OffsetPosition(source0 : SourceFile, offset0 : Int) extends Position {
private val tabInc = 8
def source = Some(source0)
def offset = Some(offset0)
def line = Some(source0.offsetToLine(offset0) + 1)
def column = {
var column = 1
// find beginning offset for line
val line = source0.offsetToLine(offset0)
var coffset = source0.lineToOffset(line)
var continue = true
while (continue) {
if (coffset == offset.get(-1)) continue = false
else if (source0.content(coffset) == '\t') column = ((column - 1) / tabInc * tabInc) + tabInc + 1
else column = column + 1
coffset = coffset + 1
}
Some(column)
}
}
|
