+### This program is free software; you can redistribute it and/or
+### modify it under the terms of the GNU General Public Licence as
+### published by the Free Software Foundation; either version 2 of the
+### Licence, or (at your option) any later version.
+###
+### This program is distributed in the hope that it will be useful,
+### but WITHOUT ANY WARRANTY; without even the implied warranty of
+### MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+### GNU General Public Licence for more details.
+###
+### A copy of version 2 of the GNU General Public Licence is available
+### at <http://www.gnu.org/licenses/old-licenses/gpl-2.0.txt>; the
+### latest version of the GNU General Public Licence is available at
+### <http://www.gnu.org/licenses/gpl.txt>.
+
+### KLUDGE: this assumes that we're being sourced with chdir=TRUE.
+### (If not, `swank:swank-require` will work under the circumstances
+### that it used to work anyway -- i.e. the working directory is the
+### swankr directory)
+swankrPath <- getwd()
+
swank <- function(port=4005) {
acceptConnections(port, FALSE)
}
startSwank <- function(portFile) {
- acceptConnections(FALSE, portFile)
+ acceptConnections(4005, portFile)
}
acceptConnections <- function(port, portFile) {
+ if(portFile != FALSE) {
+ f <- file(portFile, open="w+")
+ 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) {
}
mainLoop <- function(io) {
+ slimeConnection <- new.env()
+ slimeConnection$io <- io
while(TRUE) {
- withRestarts(tryCatch(dispatch(io, readPacket(io)),
+ withRestarts(tryCatch(dispatch(slimeConnection, readPacket(io)),
swankTopLevel=function(c) NULL),
abort="return to SLIME's toplevel")
}
}
-dispatch <- function(io, event, sldbState=NULL) {
- str(event)
+dispatch <- function(slimeConnection, event, sldbState=NULL) {
kind <- event[[1]]
if(kind == quote(`:emacs-rex`)) {
- do.call("emacsRex", c(list(io), list(sldbState), event[-1]))
+ do.call("emacsRex", c(list(slimeConnection), list(sldbState), event[-1]))
}
}
-sendToEmacs <- function(io, obj) {
- str(obj)
+sendToEmacs <- function(slimeConnection, obj) {
+ io <- slimeConnection$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)
- cat(sprintf("%06x", nchar(payload)), payload, sep="")
}
-emacsRex <- function(io, sldbState, form, pkg, thread, id, level=0) {
+callify <- function(form) {
+ ## we implement here the conversion from Lisp S-expression (or list)
+ ## expressions of code into our own, swankr, calling convention,
+ ## with slimeConnection and sldbState as first and second arguments.
+ ## as.call() gets us part of the way, but we need to walk the list
+ ## recursively to mimic CL:EVAL; we need to avoid converting R
+ ## special operators which we are punning (only `quote`, for now)
+ ## into this calling convention.
+ if(is.list(form)) {
+ if(form[[1]] == quote(quote)) {
+ as.call(form)
+ } else {
+ as.call(c(list(form[[1]], quote(slimeConnection), quote(sldbState)), lapply(form[-1], callify)))
+ }
+ } else {
+ form
+ }
+}
+
+emacsRex <- function(slimeConnection, sldbState, form, pkg, thread, id, level=0) {
ok <- FALSE
value <- NULL
+ conn <- textConnection(NULL, open="w")
+ condition <- NULL
tryCatch({
withCallingHandlers({
- value <- do.call(eval(form[[1]]), c(list(io), list(sldbState), form[-1]))
+ call <- callify(form)
+ capture.output(value <- eval(call), file=conn)
+ string <- paste(textConnectionValue(conn), sep="", collapse="\n")
+ if(nchar(string) > 0) {
+ sendToEmacs(slimeConnection, list(quote(`:write-string`), string))
+ sendToEmacs(slimeConnection, list(quote(`:write-string`), "\n"))
+ }
+ close(conn)
ok <- TRUE
}, error=function(c) {
+ condition <<- c
+ string <- paste(textConnectionValue(conn), sep="", collapse="\n")
+ if(nchar(string) > 0) {
+ sendToEmacs(slimeConnection, list(quote(`:write-string`), string))
+ sendToEmacs(slimeConnection, list(quote(`:write-string`), "\n"))
+ }
+ close(conn)
newSldbState <- makeSldbState(c, if(is.null(sldbState)) 0 else sldbState$level+1, id)
- withRestarts(sldbLoop(io, newSldbState, id), abort=paste("return to sldb level", newSldbState$level)) })},
- finally=sendToEmacs(io, list(quote(`:return`), if(ok) list(quote(`:ok`), value) else list(quote(`:abort`)), id)))
+ withRestarts(sldbLoop(slimeConnection, newSldbState, id), abort=paste("return to sldb level", newSldbState$level)) })},
+ finally=sendToEmacs(slimeConnection, list(quote(`:return`), if(ok) list(quote(`:ok`), value) else list(quote(`:abort`), as.character(condition)), id)))
}
makeSldbState <- function(condition, level, id) {
ret
}
-sldbLoop <- function(io, sldbState, id) {
+sldbLoop <- function(slimeConnection, sldbState, id) {
tryCatch({
- sendToEmacs(io, c(list(quote(`:debug`), id, sldbState$level), debuggerInfoForEmacs(sldbState)))
- sendToEmacs(io, list(quote(`:debug-activate`), id, sldbState$level, FALSE))
+ io <- slimeConnection$io
+ sendToEmacs(slimeConnection, c(list(quote(`:debug`), id, sldbState$level), `swank:debugger-info-for-emacs`(slimeConnection, sldbState)))
+ sendToEmacs(slimeConnection, list(quote(`:debug-activate`), id, sldbState$level, FALSE))
while(TRUE) {
- dispatch(io, readPacket(io), sldbState)
+ dispatch(slimeConnection, readPacket(io), sldbState)
}
- }, finally=sendToEmacs(io, c(list(quote(`:debug-return`), id, sldbState$level, FALSE))))
-}
-
-debuggerInfoForEmacs <- function(sldbState, from=0, to=NULL) {
- backtraceForEmacs <- function() {
- calls <- sldbState$calls
- if(is.null(to)) to <- length(calls)
- from <- from+1
- calls <- lapply(calls[from:to], { frameNumber <- from-1;
- function (x) { ret <- list(frameNumber, paste(format(x), sep="", collapse=" ")); frameNumber <<- 1+frameNumber; ret }})
- }
- computeRestartsForEmacs <- function () {
- lapply(sldbState$restarts,
- function(x) {
- ## this is all a little bit internalsy
- restartName <- x[[1]][[1]]
- description <- restartDescription(x)
- list(restartName, if(is.null(description)) restartName else description)
- })
- }
- list(list(as.character(sldbState$condition), sprintf(" [%s]", class(sldbState$condition)[[1]]), FALSE),
- computeRestartsForEmacs(),
- backtraceForEmacs(),
- list(sldbState$id))
+ }, finally=sendToEmacs(slimeConnection, c(list(quote(`:debug-return`), id, sldbState$level, FALSE))))
}
readPacket <- function(io) {
+ socketSelect(list(io))
header <- readChunk(io, 6)
len <- strtoi(header, base=16)
payload <- readChunk(io, len)
readChunk <- function(io, len) {
buffer <- readChar(io, len)
+ if(length(buffer) == 0) {
+ condition <- simpleCondition("End of file on io")
+ class(condition) <- c("endOfFile", class(condition))
+ signalCondition(condition)
+ }
if(nchar(buffer) != len) {
stop("short read in readChunk")
}
} else if(grepl("^[0-9]+\\.[0-9]+$", token)) {
as.double(token)
} else {
- as.name(token)
+ name <- as.name(token)
+ if(name == quote(t)) {
+ TRUE
+ } else if(name == quote(nil)) {
+ FALSE
+ } else {
+ name
+ }
}
}
readToken <- function() {
writeSexpToStringLoop(obj)
}
+prin1ToString <- function(val) {
+ paste(deparse(val, backtick=TRUE, control=c("delayPromises", "keepNA")),
+ sep="", collapse="\n")
+}
+
printToString <- function(val) {
- f <- fifo("")
- sink(f)
- print(val)
- sink()
- readLines(f)
+ paste(capture.output(print(val)), sep="", collapse="\n")
}
-`swank:connection-info` <- function (io, sldbState) {
+`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=".")))
}
-`swank:swank-require` <- function (io, sldbState, contribs) {
+`swank:swank-require` <- function (slimeConnection, sldbState, contribs) {
+ for(contrib in contribs) {
+ filename <- sprintf("%s/%s.R", swankrPath, as.character(contrib))
+ if(file.exists(filename)) {
+ source(filename)
+ }
+ }
list()
}
-`swank:create-repl` <- function(io, sldbState, env, ...) {
+`swank:create-repl` <- function(slimeConnection, sldbState, env, ...) {
list("R", "R")
}
-`swank:listener-eval` <- function(io, sldbState, string) {
- val <- eval(parse(text=string), envir = globalenv())
- string <- printToString(val)
- list(quote(`:values`), paste(string, collapse="\n"))
+makeReplResult <- function(value) {
+ string <- printToString(value)
+ list(quote(`:write-string`), string,
+ quote(`:repl-result`))
}
-`swank:autodoc` <- function(io, sldbState, rawForm, ...) {
- "No Arglist Information"
+makeReplResultFunction <- makeReplResult
+
+sendReplResult <- function(slimeConnection, value) {
+ result <- makeReplResultFunction(value)
+ sendToEmacs(slimeConnection, result)
}
-`swank:throw-to-toplevel` <- function(io, sldbState) {
+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)
+ 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, ...) {
+ list("No Arglist Information", TRUE)
+}
+
+`swank:operator-arglist` <- function(slimeConnection, sldbState, op, package) {
+ 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) {
condition <- simpleCondition("Throw to toplevel")
class(condition) <- c("swankTopLevel", class(condition))
signalCondition(condition)
}
-`swank:debugger-info-for-emacs` <- function(io, sldbState, from, to) {
- debuggerInfoForEmacs(sldbState, from=from, to=to)
+`swank:backtrace` <- function(slimeConnection, sldbState, from=0, to=NULL) {
+ calls <- sldbState$calls
+ if(is.null(to)) to <- length(calls)
+ from <- from+1
+ calls <- lapply(calls[from:to],
+ { frameNumber <- from-1;
+ function (x) {
+ ret <- list(frameNumber, paste(format(x), sep="", collapse=" "))
+ frameNumber <<- 1+frameNumber
+ ret
+ }
+ })
}
-`swank:invoke-nth-restart-for-emacs` <- function(io, sldbState, level, n) {
+computeRestartsForEmacs <- function (sldbState) {
+ lapply(sldbState$restarts,
+ function(x) {
+ ## this is all a little bit internalsy
+ restartName <- x[[1]][[1]]
+ description <- restartDescription(x)
+ list(restartName, if(is.null(description)) restartName else description)
+ })
+}
+
+`swank:debugger-info-for-emacs` <- function(slimeConnection, sldbState, from=0, to=NULL) {
+ list(list(as.character(sldbState$condition), sprintf(" [%s]", class(sldbState$condition)[[1]]), FALSE),
+ computeRestartsForEmacs(sldbState),
+ `swank:backtrace`(slimeConnection, sldbState, from, to),
+ list(sldbState$id))
+}
+
+`swank:invoke-nth-restart-for-emacs` <- function(slimeConnection, sldbState, level, n) {
if(sldbState$level == level) {
invokeRestart(sldbState$restarts[[n+1]])
}
}
-`swank:buffer-first-change` <- function(io, sldbState, filename) {
+`swank:frame-source-location` <- function(slimeConnection, sldbState, n) {
+ call <- sldbState$calls[[n+1]]
+ srcref <- attr(call, "srcref")
+ srcfile <- attr(srcref, "srcfile")
+ if(is.null(srcfile)) {
+ list(quote(`:error`), "no srcfile")
+ } else {
+ filename <- get("filename", srcfile)
+ ## KLUDGE: what this means is "is the srcfile filename
+ ## absolute?"
+ if(substr(filename, 1, 1) == "/") {
+ file <- filename
+ } else {
+ file <- sprintf("%s/%s", srcfile$wd, filename)
+ }
+ list(quote(`:location`),
+ list(quote(`:file`), file),
+ list(quote(`:line`), srcref[[1]], srcref[[2]]-1),
+ FALSE)
+ }
+}
+
+`swank:buffer-first-change` <- function(slimeConnection, sldbState, filename) {
FALSE
}
-`swank:frame-locals-and-catch-tags` <- function(io, sldbState, index) {
- str(sldbState$frames)
+`swank:eval-string-in-frame` <- function(slimeConnection, sldbState, string, index) {
+ frame <- sldbState$frames[[1+index]]
+ withRetryRestart("retry SLIME interactive evaluation request",
+ value <- eval(parse(text=string), envir=frame))
+ printToString(value)
+}
+
+`swank:frame-locals-and-catch-tags` <- function(slimeConnection, sldbState, index) {
frame <- sldbState$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`), paste(printToString(eval(parse(text=name), envir=frame)), sep="", collapse="\n")) }),
+ 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) {
+ 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("([.\\|()[{^$*+?])", "\\\\\\1", string)
+ }
+ matches <- apropos(sprintf("^%s", literal2rx(prefix)), ignore.case=FALSE)
+ nmatches <- length(matches)
+ if((nmatches == 0) && ((dollar <- regexpr("$", prefix, fixed=TRUE)) > -1)) {
+ symbolFieldsCompletion(globalenv(), 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) {
+ switch(as.character(pos[[1]]),
+ `:position` = {charOffset <- pos[[2]]},
+ `:line` = {lineOffset <- pos[[2]]; colOffset <- pos[[3]]},
+ warning("unknown content in pos", pos))
+ }
+ frob <- function(refs) {
+ lapply(refs,
+ function(x)
+ srcref(attr(x,"srcfile"),
+ c(x[1]+lineOffset-1, ifelse(x[1]==1, x[2]+colOffset-1, x[2]),
+ x[3]+lineOffset-1, ifelse(x[3]==1, x[4]+colOffset-1, x[4]),
+ ifelse(x[1]==1, x[5]+colOffset-1, x[5]),
+ 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 <-
+ switch(mode(s),
+ "call"=as.call(lapply(s, transformSrcrefs)),
+ "expression"=as.expression(lapply(s, transformSrcrefs)),
+ s)
+ attributes(new) <- attribs
+ 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({
+ times <- system.time({
+ exprs <- parse(text=string, srcfile=srcfile(filename))
+ eval(transformSrcrefs(exprs), envir = globalenv()) })},
+ abort="abort compilation")
+ list(quote(`:compilation-result`), list(), TRUE, times[3], FALSE, FALSE)
+}
+
+withRetryRestart <- function(description, expr) {
+ call <- substitute(expr)
+ retry <- TRUE
+ while(retry) {
+ retry <- FALSE
+ withRestarts(eval.parent(call),
+ retry=list(description=description,
+ handler=function() retry <<- TRUE))
+ }
+}
+
+`swank:interactive-eval` <- function(slimeConnection, sldbState, string) {
+ withRetryRestart("retry SLIME interactive evaluation request",
+ tmp <- withVisible(eval(parse(text=string), envir=globalenv())))
+ if(tmp$visible) {
+ prin1ToString(tmp$value)
+ } else {
+ "# invisible value"
+ }
+}
+
+`swank:eval-and-grab-output` <- function(slimeConnection, sldbState, string) {
+ withRetryRestart("retry SLIME interactive evaluation request",
+ { output <-
+ capture.output(tmp <- withVisible(eval(parse(text=string),
+ envir=globalenv()))) })
+ output <- paste(output, sep="", collapse="\n")
+ if(tmp$visible) {
+ list(output, prin1ToString(tmp$value))
+ } else {
+ list(output, "# invisible value")
+ }
+}
+
+`swank:interactive-eval-region` <- function(slimeConnection, sldbState, string) {
+ withRetryRestart("retry SLIME interactive evaluation request",
+ tmp <- withVisible(eval(parse(text=string), envir=globalenv())))
+ if(tmp$visible) {
+ prin1ToString(tmp$value)
+ } else {
+ "# invisible value"
+ }
+}
+
+`swank:find-definitions-for-emacs` <- function(slimeConnection, sldbState, string) {
+ if(exists(string, envir = globalenv())) {
+ thing <- get(string, envir = globalenv())
+ if(inherits(thing, "function")) {
+ body <- body(thing)
+ srcref <- attr(body, "srcref")
+ srcfile <- attr(body, "srcfile")
+ if(is.null(srcfile)) {
+ list()
+ } else {
+ filename <- get("filename", srcfile)
+ ## KLUDGE: what this means is "is the srcfile filename
+ ## absolute?"
+ if(substr(filename, 1, 1) == "/") {
+ file <- filename
+ } else {
+ file <- sprintf("%s/%s", srcfile$wd, filename)
+ }
+ list(list(sprintf("function %s", string),
+ list(quote(`:location`),
+ list(quote(`:file`), file),
+ list(quote(`:line`), srcref[[2]][[1]], srcref[[2]][[2]]-1),
+ list())))
+ }
+ } else {
+ list()
+ }
+ } else {
+ list()
+ }
+}
+
+`swank:value-for-editing` <- function(slimeConnection, sldbState, string) {
+ paste(deparse(eval(parse(text=string), envir = globalenv()), control="all"),
+ collapse="\n", sep="")
+}
+
+`swank:commit-edited-value` <- function(slimeConnection, sldbState, string, value) {
+ eval(parse(text=sprintf("%s <- %s", string, value)), envir = globalenv())
+ TRUE
+}
+
+resetInspector <- function(slimeConnection) {
+ assign("istate", list(), envir=slimeConnection)
+ assign("inspectorHistory", NULL, envir=slimeConnection)
+}
+
+`swank:init-inspector` <- function(slimeConnection, sldbState, string) {
+ withRetryRestart("retry SLIME inspection request",
+ { resetInspector(slimeConnection)
+ value <- inspectObject(slimeConnection, eval(parse(text=string), envir=globalenv()))
+ })
+ value
+}
+
+inspectObject <- function(slimeConnection, object) {
+ vectorify <- function(x) {
+ if(is.vector(x)) {
+ x
+ } else {
+ list(x)
+ }
+ }
+ previous <- slimeConnection$istate
+ slimeConnection$istate <- new.env()
+ slimeConnection$istate$object <- object
+ slimeConnection$istate$previous <- previous
+ slimeConnection$istate$content <- emacsInspect(object)
+ if(!(vectorify(object) %in% slimeConnection$inspectorHistory)) {
+ slimeConnection$inspectorHistory <- c(slimeConnection$inspectorHistory, object)
+ }
+ if(!is.null(slimeConnection$istate$previous)) {
+ slimeConnection$istate$previous$`next` <- slimeConnection$istate
+ }
+ istateToElisp(slimeConnection$istate)
+}
+
+valuePart <- function(istate, object, string) {
+ list(quote(`:value`),
+ if(is.null(string)) prin1ToString(object) else string,
+ assignIndexInParts(object, istate))
+}
+
+preparePart <- function(istate, part) {
+ if(is.character(part)) {
+ list(part)
+ } else {
+ switch(as.character(part[[1]]),
+ `:newline` = list("\n"),
+ `:value` = valuePart(istate, part[[2]], part[[3]]),
+ `:line` = list(prin1ToString(part[[2]]), ": ",
+ valuePart(istate, part[[3]], NULL), "\n"))
+ }
+}
+
+prepareRange <- function(istate, start, end) {
+ range <- istate$content[start+1:min(end+1, length(istate$content))]
+ ps <- NULL
+ for(part in range) {
+ ps <- c(ps, preparePart(istate, part))
+ }
+ list(ps, if(length(ps)<end-start) { start+length(ps) } else { end+1000 },
+ start, end)
+}
+
+assignIndexInParts <- function(object, istate) {
+ ret <- 1+length(istate$parts)
+ istate$parts <- c(istate$parts, list(object))
+ ret
+}
+
+istateToElisp <- function(istate) {
+ list(quote(`:title`), deparse(istate$object, control="all", nlines=1),
+ quote(`:id`), assignIndexInParts(istate$object, istate),
+ quote(`:content`), prepareRange(istate, 0, 500))
+}
+
+emacsInspect <- function(object) {
+ UseMethod("emacsInspect")
+}
+
+emacsInspect.default <- function(thing) {
+ c(list(paste("a ", class(thing)[[1]], sep=""), list(quote(`:newline`))))
+}
+
+emacsInspect.list <- function(list) {
+ c(list("a list", list(quote(`:newline`))),
+ mapply(function(name, value) { list(list(quote(`:line`), name, value)) },
+ names(list), list))
+}
+
+emacsInspect.numeric <- function(numeric) {
+ c(list("a numeric", list(quote(`:newline`))),
+ mapply(function(name, value) { list(list(quote(`:line`), name, value)) },
+ (1:length(numeric)), numeric))
+}
+
+`swank:quit-inspector` <- function(slimeConnection, sldbState) {
+ resetInspector(slimeConnection)
+ FALSE
+}
+
+`swank:inspector-nth-part` <- function(slimeConnection, sldbState, index) {
+ slimeConnection$istate$parts[[index]]
+}
+
+`swank:inspect-nth-part` <- function(slimeConnection, sldbState, index) {
+ object <- `swank:inspector-nth-part`(slimeConnection, sldbState, index)
+ inspectObject(slimeConnection, object)
+}
+
+`swank:inspector-pop` <- function(slimeConnection, sldbState) {
+ if(!is.null(slimeConnection$istate$previous)) {
+ slimeConnection$istate <- slimeConnection$istate$previous
+ istateToElisp(slimeConnection$istate)
+ } else {
+ FALSE
+ }
+}
+
+`swank:inspector-next` <- function(slimeConnection, sldbState) {
+ if(!is.null(slimeConnection$istate$`next`)) {
+ slimeConnection$istate <- slimeConnection$istate$`next`
+ istateToElisp(slimeConnection$istate)
+ } else {
+ FALSE
+ }
+}
+
+`swank:inspector-eval` <- function(slimeConnection, sldbState, string) {
+ expr <- parse(text=string)[[1]]
+ object <- slimeConnection$istate$object
+ if(inherits(object, "list")|inherits(object, "environment")) {
+ substituted <- substituteDirect(expr, object)
+ eval(substituted, envir=globalenv())
+ } else {
+ eval(expr, envir=globalenv())
+ }
+}
+
+`swank:inspect-current-condition` <- function(slimeConnection, sldbState) {
+ resetInspector(slimeConnection)
+ inspectObject(slimeConnection, sldbState$condition)
+}
+
+`swank:inspect-frame-var` <- function(slimeConnection, sldbState, frame, var) {
+ resetInspector(slimeConnection)
+ frame <- sldbState$frames[[1+frame]]
+ name <- ls(envir=frame)[[1+var]]
+ object <- get(name, envir=frame)
+ inspectObject(slimeConnection, object)
+}
+
+`swank:default-directory` <- function(slimeConnection, sldbState) {
+ getwd()
+}
+
+`swank:set-default-directory` <- function(slimeConnection, sldbState, directory) {
+ setwd(directory)
+ `swank:default-directory`(slimeConnection, sldbState)
+}
+
+`swank:load-file` <- function(slimeConnection, sldbState, filename) {
+ source(filename, local=FALSE, keep.source=TRUE)
+ TRUE
+}
+
+`swank:compile-file-for-emacs` <- function(slimeConnection, sldbState, filename, loadp, ...) {
+ times <- system.time(parse(filename, srcfile=srcfile(filename)))
+ if(loadp) {
+ ## KLUDGE: inelegant, but works. It might be more in the spirit
+ ## of things to keep the result of the parse above around to
+ ## evaluate.
+ `swank:load-file`(slimeConnection, sldbState, filename)
+ }
+ list(quote(`:compilation-result`), list(), TRUE, times[3], substitute(loadp), filename)
+}
+
+`swank:quit-lisp` <- function(slimeConnection, sldbState) {
+ quit()
+}