X-Git-Url: http://christophe.rhodes.io/gitweb/?p=swankr.git;a=blobdiff_plain;f=swank.R;h=67fdbbcfc9cdb1d63e72130a3e169176312f9584;hp=cf64daaaa81b8ad7341284a67dd67423058c922f;hb=fdb4f4d744580b9dc6db92489610f32e42cec15e;hpb=4da3085437b358a5c9b21a91ad01732c85568416

diff --git a/swank.R b/swank.R
index cf64daa..67fdbbc 100644
--- a/swank.R
+++ b/swank.R
@@ -33,9 +33,10 @@ acceptConnections <- function(port, portFile) {
     cat(port, file=f)
     close(f)
   }
+  ## FIXME: maybe we should support dontClose here?
   s <- socketConnection(host="localhost", server=TRUE, port=port, open="r+b")
   on.exit(close(s))
-  serve(s)
+  tryCatch(serve(s), endOfFile=function(c) NULL)
 }
 
 serve <- function(io) {
@@ -62,7 +63,7 @@ dispatch <- function(slimeConnection, event, sldbState=NULL) {
 sendToEmacs <- function(slimeConnection, obj) {
   io <- slimeConnection$io
   payload <- writeSexpToString(obj)
-  writeChar(sprintf("%06x", nchar(payload)), io, eos=NULL)
+  writeChar(sprintf("%06x", nchar(payload, type="bytes")), io, eos=NULL)
   writeChar(payload, io, eos=NULL)
   flush(io)
 }
@@ -145,6 +146,11 @@ readPacket <- function(io) {
 
 readChunk <- function(io, len) {
   buffer <- readChar(io, len)
+  if(length(buffer) == 0) {
+    condition <- simpleCondition("End of file on io")
+    class(condition) <- c("endOfFile", class(condition))
+    signalCondition(condition)
+  }
   if(nchar(buffer) != len) {
     stop("short read in readChunk")
   }
@@ -287,6 +293,8 @@ printToString <- function(val) {
 `swank:connection-info` <- function (slimeConnection, sldbState) {
   list(quote(`:pid`), Sys.getpid(),
        quote(`:package`), list(quote(`:name`), "R", quote(`:prompt`), "R> "),
+       quote(`:version`), "2012-04-23",
+       quote(`:encoding`), list(quote(`:coding-systems`), list("utf-8-unix")),
        quote(`:lisp-implementation`), list(quote(`:type`), "R",
                                            quote(`:name`), "R",
                                            quote(`:version`), paste(R.version$major, R.version$minor, sep=".")))
@@ -324,22 +332,49 @@ sendReplResultFunction <- sendReplResult
 `swank:listener-eval` <- function(slimeConnection, sldbState, string) {
   ## O how ugly
   string <- gsub("#\\.\\(swank:lookup-presented-object-or-lose([^)]*)\\)", ".(`swank:lookup-presented-object-or-lose`(slimeConnection, sldbState,\\1))", string)
-  expr <- parse(text=string)[[1]]
-  ## O maybe this is even uglier
-  lookedup <- do.call("bquote", list(expr))
-  tmp <- withVisible(eval(lookedup, envir = globalenv()))
-  if(tmp$visible) {
-    sendReplResultFunction(slimeConnection, tmp$value)
+  for(expr in parse(text=string)) {
+    expr <- expr
+    ## O maybe this is even uglier
+    lookedup <- do.call("bquote", list(expr))
+    tmp <- withVisible(eval(lookedup, envir = globalenv()))
+    if(tmp$visible) {
+      sendReplResultFunction(slimeConnection, tmp$value)
+    }
   }
   list()
 }
 
 `swank:autodoc` <- function(slimeConnection, sldbState, rawForm, ...) {
-  "No Arglist Information"
+  list("No Arglist Information", TRUE)
 }
 
 `swank:operator-arglist` <- function(slimeConnection, sldbState, op, package) {
-  list()
+  if(!exists(op, envir = globalenv())) {
+    return(list())
+  }
+  funoid <- get(op, envir = globalenv())
+  if(is.function(funoid)) {
+    args <- formals(funoid)
+    paste(sprintf("%s=%s", names(args), args), collapse=", ")
+  } else {
+    list()
+  }
+}
+
+`swank:describe-function` <- function(slimeConnection, sldbState, op, package) {
+  ## FIXME: maybe not the best match?
+  `swank:operator-arglist`(slimeConnection, sldbState, op, package)
+}
+
+helpFilesWithTopicString <- function(value) {
+  output <- capture.output(tools:::Rd2txt(utils:::.getHelpFile(value),
+                                          options=list(underline_titles=FALSE)))
+  paste(output, collapse="\n")
+}
+
+`swank:describe-symbol` <- function(slimeConnection, sldbState, op, package) {
+  value <- help(op)
+  helpFilesWithTopicString(value)
 }
 
 `swank:throw-to-toplevel` <- function(slimeConnection, sldbState) {
@@ -421,24 +456,59 @@ computeRestartsForEmacs <- function (sldbState) {
 `swank:frame-locals-and-catch-tags` <- function(slimeConnection, sldbState, index) {
   frame <- sldbState$frames[[1+index]]
   objs <- ls(envir=frame)
+  if(identical(frame, globalenv())) {
+    objs <- c()
+  }
   list(lapply(objs, function(name) { list(quote(`:name`), name,
                                           quote(`:id`), 0,
-                                          quote(`:value`), printToString(eval(parse(text=name), envir=frame))) }),
+                                          quote(`:value`),
+                                          tryCatch({
+                                            printToString(eval(parse(text=name), envir=frame))
+                                          }, error=function(c) {
+                                            sprintf("error printing object")
+                                          }))}),
        list())
 }
 
 `swank:simple-completions` <- function(slimeConnection, sldbState, prefix, package) {
-  ## fails multiply if prefix contains regexp metacharacters
-  matches <- apropos(sprintf("^%s", prefix), ignore.case=FALSE)
+  symbolFieldsCompletion <- function(object, rest) {
+    ## FIXME: this is hacky, ignoring several syntax issues (use of
+    ## and/or necessity for backquoting identifiers: e.g. fields
+    ## containing hyphens)
+    if((dollar <- regexpr("$", rest, fixed=TRUE)) == -1) {
+      matches <- grep(sprintf("^%s", literal2rx(rest)), names(object), value=TRUE)
+      matches <- sprintf("%s$%s", gsub("\\$[^$]*$", "", prefix), matches)
+      returnMatches(matches)
+    } else {
+      if(exists(substr(rest, 1, dollar-1), object)) {
+        symbolFieldsCompletion(get(substr(rest, 1, dollar-1), object), substr(rest, dollar+1, nchar(rest)))
+      } else {
+        returnMatches(character(0))
+      }
+    }
+  }
+  returnMatches <- function(matches) {
+    nmatches <- length(matches)
+    if(nmatches == 0) {
+      list(list(), "")
+    } else {
+      longest <- matches[order(nchar(matches))][1]
+      while(length(grep(sprintf("^%s", literal2rx(longest)), matches)) < nmatches) {
+        longest <- substr(longest, 1, nchar(longest)-1)
+      }
+      list(as.list(matches), longest)
+    }
+  }
+  literal2rx <- function(string) {
+    ## list of ERE metacharacters from ?regexp
+    gsub("([.\\|()[{^$*+?])", "\\\\\\1", string)
+  }
+  matches <- apropos(sprintf("^%s", literal2rx(prefix)), ignore.case=FALSE)
   nmatches <- length(matches)
-  if(nmatches == 0) {
-    list(list(), "")
+  if((nmatches == 0) && ((dollar <- regexpr("$", prefix, fixed=TRUE)) > -1)) {
+    symbolFieldsCompletion(globalenv(), prefix)
   } else {
-    longest <- matches[order(nchar(matches))][1]
-    while(length(grep(sprintf("^%s", longest), matches)) < nmatches) {
-      longest <- substr(longest, 1, nchar(longest)-1)
-    }
-    list(as.list(matches), longest)
+    returnMatches(matches)
   }
 }
 
@@ -460,6 +530,23 @@ computeRestartsForEmacs <- function (sldbState) {
                     ifelse(x[3]==1, x[6]+colOffset-1, x[6]))))
   }
   transformSrcrefs <- function(s) {
+    ## horrendous KLUDGE: we need to short-circuit here for "name"
+    ## objects, rather than having a nice uniform behaviour, because
+    ## for expressions of the form x[y,] there is an empty "name"
+    ## which ends up becoming a `missing' object when passed through
+    ## the switch; why, I do not know, but it is then impossible to
+    ## return it, because returning it attempts to evaluate it and
+    ## evaluating it is an error.  Fortunately it appears that names
+    ## don't have srcrefs attached.
+    if(mode(s) == "name") {
+      return(s)
+    }
+    if(is(s, "srcref")) {
+      ## more monumental KLUDGE: parsing (in 2.14, at least) appears
+      ## to put srcrefs directly in `length 2' objects, which we need
+      ## to frob directly.
+      return(frob(list(s))[[1]])
+    }
     srcrefs <- attr(s, "srcref")
     attribs <- attributes(s)
     new <- 
@@ -471,6 +558,9 @@ computeRestartsForEmacs <- function (sldbState) {
     if(!is.null(attr(s, "srcref"))) {
       attr(new, "srcref") <- frob(srcrefs)
     }
+    if(!is.null(attr(s, "wholeSrcref"))) {
+      attr(new, "wholeSrcref") <- frob(list(attr(s, "wholeSrcref")))[[1]]
+    }
     new
   }
   withRestarts({
@@ -509,7 +599,7 @@ withRetryRestart <- function(description, expr) {
                                                               envir=globalenv()))) })
   output <- paste(output, sep="", collapse="\n")
   if(tmp$visible) {
-    list(output, prin1ToString(value))
+    list(output, prin1ToString(tmp$value))
   } else {
     list(output, "# invisible value")
   }
@@ -519,7 +609,7 @@ withRetryRestart <- function(description, expr) {
   withRetryRestart("retry SLIME interactive evaluation request",
                    tmp <- withVisible(eval(parse(text=string), envir=globalenv())))
   if(tmp$visible) {
-    prin1ToString(value)
+    prin1ToString(tmp$value)
   } else {
     "# invisible value"
   }
@@ -581,12 +671,19 @@ resetInspector <- function(slimeConnection) {
 }
 
 inspectObject <- function(slimeConnection, object) {
+  vectorify <- function(x) {
+    if(is.vector(x)) {
+      x
+    } else {
+      list(x)
+    }
+  }
   previous <- slimeConnection$istate
   slimeConnection$istate <- new.env()
   slimeConnection$istate$object <- object
   slimeConnection$istate$previous <- previous
   slimeConnection$istate$content <- emacsInspect(object)
-  if(!(object %in% slimeConnection$inspectorHistory)) {
+  if(!(vectorify(object) %in% slimeConnection$inspectorHistory)) {
     slimeConnection$inspectorHistory <- c(slimeConnection$inspectorHistory, object)
   }
   if(!is.null(slimeConnection$istate$previous)) {
@@ -597,7 +694,7 @@ inspectObject <- function(slimeConnection, object) {
 
 valuePart <- function(istate, object, string) {
   list(quote(`:value`),
-       if(is.null(string)) printToString(object) else string,
+       if(is.null(string)) prin1ToString(object) else string,
        assignIndexInParts(object, istate))
 }
 
@@ -608,7 +705,7 @@ preparePart <- function(istate, part) {
     switch(as.character(part[[1]]),
            `:newline` = list("\n"),
            `:value` = valuePart(istate, part[[2]], part[[3]]),
-           `:line` = list(printToString(part[[2]]), ": ",
+           `:line` = list(prin1ToString(part[[2]]), ": ",
              valuePart(istate, part[[3]], NULL), "\n"))
   }
 }