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ammonite.repl.AmmoniteFrontEnd.scala Maven / Gradle / Ivy
package ammonite.repl
import java.io.{InputStream, OutputStream, OutputStreamWriter}
import ammonite.repl.api.FrontEnd
import ammonite.terminal.filters._
import GUILikeFilters.SelectionFilter
import ammonite.terminal._
import fastparse.Parsed
import ammonite.util.{Colors, Res}
import ammonite.compiler.iface.Parser
case class AmmoniteFrontEnd(
parser: Parser,
extraFilters: Filter = Filter.empty
) extends FrontEnd {
def width = FrontEndUtils.width
def height = FrontEndUtils.height
def action(
input: InputStream,
reader: java.io.Reader,
output: OutputStream,
prompt: String,
colors: Colors,
compilerComplete: (Int, String) => (Int, Seq[String], Seq[String]),
history: IndexedSeq[String],
addHistory: String => Unit
) = {
readLine(reader, output, prompt, colors, compilerComplete, history) match {
case None => Res.Exit(())
case Some(code) =>
addHistory(code)
parser.split(code, ignoreIncomplete = false).get match {
case Right(value) => Res.Success((code, value))
case Left(error) => Res.Failure(error)
}
}
}
val cutPasteFilter = ReadlineFilters.CutPasteFilter()
def readLine(
reader: java.io.Reader,
output: OutputStream,
prompt: String,
colors: Colors,
compilerComplete: (Int, String) => (Int, Seq[String], Seq[String]),
history: IndexedSeq[String]
) = {
val writer = new OutputStreamWriter(output)
val autocompleteFilter: Filter = Filter.action(SpecialKeys.Tab) {
case TermState(rest, b, c, _) =>
val (newCursor, completions, details) = TTY.withSttyOverride(TTY.restoreSigInt()) {
compilerComplete(c, b.mkString)
}
val details2 = for (d <- details) yield {
parser.defaultHighlight(
d.toVector,
colors.comment(),
colors.`type`(),
colors.literal(),
colors.keyword(),
colors.error(),
fansi.Attr.Reset
).mkString
}
lazy val common = FrontEndUtils.findPrefix(completions, 0)
val blacklisted = Seq(
"!=",
"==",
"asInstanceOf",
"equals",
"getClass",
"hashCode",
"isInstanceOf",
"toString",
"|>"
)
val completions2 = for (comp <- completions.filterNot(blacklisted.contains)) yield {
val (left, right) = comp.splitAt(common.length)
(colors.comment()(left) ++ right).render
}
val stdout =
FrontEndUtils.printCompletions(completions2, details2)
.mkString
if (details.nonEmpty || completions.isEmpty)
Printing(TermState(rest, b, c), stdout)
else {
val newBuffer = b.take(newCursor) ++ common ++ b.drop(c)
Printing(TermState(rest, newBuffer, newCursor + common.length), stdout)
}
}
// Enter
val multilineFilter = Filter.action(
SpecialKeys.NewLine,
ti => parser.split(ti.ts.buffer.mkString).isEmpty
) {
case TermState(rest, b, c, _) => BasicFilters.injectNewLine(b, c, rest)
}
val historyFilter = new HistoryFilter(
() => history.reverse,
colors.comment()
)
val selectionFilter = GUILikeFilters.SelectionFilter(indent = 2)
val allFilters = Filter.merge(
UndoFilter(),
historyFilter,
extraFilters,
selectionFilter,
GUILikeFilters.altFilter,
GUILikeFilters.fnFilter,
ReadlineFilters.navFilter,
autocompleteFilter,
cutPasteFilter,
multilineFilter,
BasicFilters.all
)
val res = Terminal.readLine(
prompt,
reader,
writer,
allFilters,
displayTransform = { (buffer, cursor) =>
val highlighted = fansi.Str(parser.defaultHighlight(
buffer.toVector,
colors.comment(),
colors.`type`(),
colors.literal(),
colors.keyword(),
colors.error(),
fansi.Attr.Reset
).mkString)
val (newBuffer, offset) = SelectionFilter.mangleBuffer(
selectionFilter,
highlighted,
cursor,
colors.selected()
)
val newNewBuffer = HistoryFilter.mangleBuffer(
historyFilter,
newBuffer,
cursor,
fansi.Underlined.On
)
(newNewBuffer, offset)
}
)
res
}
}
