X-Git-Url: http://christophe.rhodes.io/gitweb/?p=swankr.git;a=blobdiff_plain;f=swank.R;h=22dd53286c467fc02abb8a162e942fb04f10c5d8;hp=f395217bf92abe79767a55c5434bc015bb003781;hb=de8519735fa924b327c5720d9e8efc2dadc834c4;hpb=2d372ae85cf0f1eacb4c44e3615499e0a29bf6b6 diff --git a/swank.R b/swank.R index f395217..22dd532 100644 --- a/swank.R +++ b/swank.R @@ -1,3 +1,18 @@ +### 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 ; the +### latest version of the GNU General Public Licence is available at +### . + swank <- function(port=4005) { acceptConnections(port, FALSE) } @@ -17,22 +32,25 @@ serve <- function(io) { } mainLoop <- function(io) { + slimeConnection <- new.env() + slimeConnection$io <- io while(TRUE) { - withRestarts(tryCatch(dispatch(io, readPacket(io)), + withRestarts(tryCatch(dispatch(slimeConnection, readPacket(io)), swankTopLevel=function(c) NULL), abort="return to SLIME's toplevel") } } -dispatch <- function(io, event, sldbState=NULL) { +dispatch <- function(slimeConnection, event, sldbState=NULL) { str(event) kind <- event[[1]] if(kind == quote(`:emacs-rex`)) { - do.call("emacsRex", c(list(io), list(sldbState), event[-1])) + do.call("emacsRex", c(list(slimeConnection), list(sldbState), event[-1])) } } -sendToEmacs <- function(io, obj) { +sendToEmacs <- function(slimeConnection, obj) { + io <- slimeConnection$io str(obj) payload <- writeSexpToString(obj) writeChar(sprintf("%06x", nchar(payload)), io, eos=NULL) @@ -41,17 +59,37 @@ sendToEmacs <- function(io, obj) { 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 tryCatch({ withCallingHandlers({ - value <- do.call(eval(form[[1]]), c(list(io), list(sldbState), form[-1])) + call <- callify(form) + value <- eval(call) ok <- TRUE }, error=function(c) { 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$level)) })}, + finally=sendToEmacs(slimeConnection, list(quote(`:return`), if(ok) list(quote(`:ok`), value) else list(quote(`:abort`)), id))) } makeSldbState <- function(condition, level, id) { @@ -63,17 +101,19 @@ makeSldbState <- function(condition, level, id) { ret } -sldbLoop <- function(io, sldbState, id) { +sldbLoop <- function(slimeConnection, sldbState, id) { tryCatch({ - sendToEmacs(io, c(list(quote(`:debug`), id, sldbState$level), `swank:debugger-info-for-emacs`(io, 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$level, FALSE)))) + }, finally=sendToEmacs(slimeConnection, c(list(quote(`:debug-return`), id, sldbState$level, FALSE)))) } readPacket <- function(io) { + socketSelect(list(io)) header <- readChunk(io, 6) len <- strtoi(header, base=16) payload <- readChunk(io, len) @@ -205,13 +245,20 @@ writeSexpToString <- function(obj) { writeSexpToStringLoop(obj) } -printToString <- function(val) { +withOutputToString <- function(expr) { + call <- substitute(expr) f <- fifo("") - tryCatch({ sink(f); print(val); sink(); readLines(f) }, + sink(f) + tryCatch({ tryCatch(eval.parent(call), finally=sink()) + readLines(f) }, finally=close(f)) } -`swank:connection-info` <- function (io, sldbState) { +printToString <- function(val) { + withOutputToString(str(val, indent.str="", list.len=5, max.level=2)) +} + +`swank:connection-info` <- function (slimeConnection, sldbState) { list(quote(`:pid`), Sys.getpid(), quote(`:package`), list(quote(`:name`), "R", quote(`:prompt`), "R> "), quote(`:lisp-implementation`), list(quote(`:type`), "R", @@ -219,35 +266,54 @@ printToString <- function(val) { 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.R", as.character(contrib)) + if(file.exists(filename)) { + source(filename, verbose=TRUE) + } + } 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")) +sendReplResult <- function(slimeConnection, value) { + string <- printToString(value) + sendToEmacs(slimeConnection, + list(quote(`:write-string`), + paste(string, collapse="\n"), + quote(`:repl-result`))) +} + +sendReplResultFunction <- sendReplResult + +`swank:listener-eval` <- function(slimeConnection, sldbState, string) { + string <- gsub("#\\.\\(swank:lookup-presented-object-or-lose([^)]*)\\)", ".(`swank:lookup-presented-object-or-lose`(slimeConnection, sldbState,\\1))", string) + expr <- parse(text=string)[[1]] + lookedup <- do.call("bquote", list(expr)) + value <- eval(lookedup, envir = globalenv()) + sendReplResultFunction(slimeConnection, value) + list() } -`swank:autodoc` <- function(io, sldbState, rawForm, ...) { +`swank:autodoc` <- function(slimeConnection, sldbState, rawForm, ...) { "No Arglist Information" } -`swank:operator-arglist` <- function(io, sldbState, op, package) { +`swank:operator-arglist` <- function(slimeConnection, sldbState, op, package) { list() } -`swank:throw-to-toplevel` <- function(io, sldbState) { +`swank:throw-to-toplevel` <- function(slimeConnection, sldbState) { condition <- simpleCondition("Throw to toplevel") class(condition) <- c("swankTopLevel", class(condition)) signalCondition(condition) } -`swank:backtrace` <- function(io, sldbState, from=0, to=NULL) { +`swank:backtrace` <- function(slimeConnection, sldbState, from=0, to=NULL) { calls <- sldbState$calls if(is.null(to)) to <- length(calls) from <- from+1 @@ -271,39 +337,38 @@ computeRestartsForEmacs <- function (sldbState) { }) } -`swank:debugger-info-for-emacs` <- function(io, sldbState, from=0, to=NULL) { +`swank:debugger-info-for-emacs` <- function(slimeConnection, sldbState, from=0, to=NULL) { list(list(as.character(sldbState$condition), sprintf(" [%s]", class(sldbState$condition)[[1]]), FALSE), computeRestartsForEmacs(sldbState), - `swank:backtrace`(io, sldbState, from, to), + `swank:backtrace`(slimeConnection, sldbState, from, to), list(sldbState$id)) } -`swank:invoke-nth-restart-for-emacs` <- function(io, sldbState, level, n) { +`swank:invoke-nth-restart-for-emacs` <- function(slimeConnection, sldbState, level, n) { if(sldbState$level == level) { invokeRestart(sldbState$restarts[[n+1]]) } } -`swank:frame-source-location` <- function(io, sldbState, n) { +`swank:frame-source-location` <- function(slimeConnection, sldbState, n) { call <- sldbState$calls[[n+1]] srcref <- attr(call, "srcref") srcfile <- attr(srcref, "srcfile") if(is.null(srcfile)) { list(quote(`:error`), "no srcfile") } else { - filename <- get("filename", srcfile) list(quote(`:location`), - list(quote(`:file`), filename), + list(quote(`:file`), sprintf("%s/%s", srcfile$wd, srcfile$filename)), list(quote(`:line`), srcref[[1]], srcref[[2]]-1), FALSE) } } -`swank:buffer-first-change` <- function(io, sldbState, filename) { +`swank:buffer-first-change` <- function(slimeConnection, sldbState, filename) { FALSE } -`swank:frame-locals-and-catch-tags` <- function(io, sldbState, index) { +`swank:frame-locals-and-catch-tags` <- function(slimeConnection, sldbState, index) { str(sldbState$frames) frame <- sldbState$frames[[1+index]] objs <- ls(envir=frame) @@ -313,7 +378,7 @@ computeRestartsForEmacs <- function (sldbState) { list()) } -`swank:simple-completions` <- function(io, sldbState, prefix, package) { +`swank:simple-completions` <- function(slimeConnection, sldbState, prefix, package) { ## fails multiply if prefix contains regexp metacharacters matches <- apropos(sprintf("^%s", prefix), ignore.case=FALSE) nmatches <- length(matches) @@ -328,7 +393,7 @@ computeRestartsForEmacs <- function (sldbState) { } } -`swank:compile-string-for-emacs` <- function(io, sldbState, string, buffer, position, filename, policy) { +`swank:compile-string-for-emacs` <- function(slimeConnection, sldbState, string, buffer, position, filename, policy) { # FIXME: I think in parse() here we can use srcref to associate # buffer/filename/position to the objects. Or something. withRestarts({ times <- system.time(eval(parse(text=string), envir = globalenv())) }, @@ -336,28 +401,62 @@ computeRestartsForEmacs <- function (sldbState) { list(quote(`:compilation-result`), list(), TRUE, times[3]) } -`swank:interactive-eval` <- function(io, sldbState, string) { +withRetryRestart <- function(description, expr) { + call <- substitute(expr) retry <- TRUE - value <- "" while(retry) { retry <- FALSE - withRestarts(value <- eval(parse(text=string), envir = globalenv()), - retry=list(description="retry SLIME interactive evaluation request", handler=function() retry <<- TRUE)) + 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", + value <- eval(parse(text=string), envir=globalenv())) printToString(value) } -`swank:eval-and-grab-output` <- function(io, sldbState, string) { - retry <- TRUE - value <- "" - output <- NULL - f <- fifo("") - tryCatch({ - sink(f) - while(retry) { - retry <- FALSE - withRestarts(value <- eval(parse(text=string), envir = globalenv()), - retry=list(description="retry SLIME interactive evaluation request", handler=function() retry <<- TRUE))}}, - finally={sink(); output <- readLines(f); close(f)}) +`swank:eval-and-grab-output` <- function(slimeConnection, sldbState, string) { + withRetryRestart("retry SLIME interactive evaluation request", + { output <- + withOutputToString(value <- eval(parse(text=string), + envir=globalenv())) }) list(output, printToString(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) + list(list(sprintf("function %s", string), + list(quote(`:location`), + list(quote(`:file`), sprintf("%s/%s", srcfile$wd, srcfile$filename)), + 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 +}