X-Git-Url: http://christophe.rhodes.io/gitweb/?p=swankr.git;a=blobdiff_plain;f=swank.R;h=38160edd339acda845dbb40a40b5d3c15eaeca2c;hp=d91c35fdbd3663c3d8312a2a204a3e6a0ec73af7;hb=04218c0c1af88835d1d2e68d97c6e644b7afae35;hpb=24bb738d87a1636b9b86850e14c59b608fe61fb9

diff --git a/swank.R b/swank.R
index d91c35f..38160ed 100644
--- a/swank.R
+++ b/swank.R
@@ -293,6 +293,7 @@ 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",
@@ -343,12 +344,41 @@ sendReplResultFunction <- sendReplResult
   list()
 }
 
+`swank:clear-repl-variables` <- function(slimeConnection, sldbState) {
+  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) {
@@ -444,12 +474,24 @@ computeRestartsForEmacs <- function (sldbState) {
        list())
 }
 
-`swank:simple-completions` <- function(slimeConnection, sldbState, prefix, package) {
-  literal2rx <- function(string) {
-    ## list of ERE metacharacters from ?regexp
-    gsub("([.\\|()[{^$*+?])", "\\\\\\1", string)
+symbolFieldsCompletion <- function(object, prefix, rest) {
+  ## FIXME: this is hacky, ignoring several syntax issues (use of
+  ## and/or necessity for backquoting identifiers: e.g. fields
+  ## containing hyphens)
+  if((dollar <- regexpr("$", 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), prefix, substr(rest, dollar+1, nchar(rest)))
+    } else {
+      returnMatches(character(0))
+    }
   }
-  matches <- apropos(sprintf("^%s", literal2rx(prefix)), ignore.case=FALSE)
+}
+
+returnMatches <- function(matches) {
   nmatches <- length(matches)
   if(nmatches == 0) {
     list(list(), "")
@@ -462,6 +504,21 @@ computeRestartsForEmacs <- function (sldbState) {
   }
 }
 
+literal2rx <- function(string) {
+  ## list of ERE metacharacters from ?regexp
+  gsub("([.\\|()[{^$*+?])", "\\\\\\1", string)
+}
+
+`swank:simple-completions` <- function(slimeConnection, sldbState, prefix, package) {
+  matches <- apropos(sprintf("^%s", literal2rx(prefix)), ignore.case=FALSE)
+  nmatches <- length(matches)
+  if((nmatches == 0) && ((dollar <- regexpr("$", prefix, fixed=TRUE)) > -1)) {
+    symbolFieldsCompletion(globalenv(), prefix, prefix)
+  } else {
+    returnMatches(matches)
+  }
+}
+
 `swank:compile-string-for-emacs` <- function(slimeConnection, sldbState, string, buffer, position, filename, policy) {
   lineOffset <- charOffset <- colOffset <- NULL
   for(pos in position) {
@@ -480,6 +537,23 @@ 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 <- 
@@ -491,6 +565,9 @@ 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({
@@ -624,7 +701,7 @@ 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))
 }
 
@@ -635,7 +712,7 @@ 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"))
   }
 }