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/**
* (C) Copyright 2008 Jeremy Maitin-Shepard
*
* Use, modification, and distribution are subject to the terms specified in the
* COPYING file.
**/
define_variable("editor_shell_command", getenv("EDITOR") || "emacs",
"Shell command used to invoke an external editor.\n" +
"This defaults to the value of the EDITOR environment variable. If " +
"`run_external_editor_function' is non-null, it is used instead to " +
"invoke an external editor and the value of this variable is ignored." +
"It is used as part of a shell command in the following two ways:\n" +
"<editor_shell_command> <file>\n" +
"<editor_shell_command> +<line> <file>");
define_variable("run_external_editor_function", null,
"Coroutine function called to invoke an external editor.\n" +
"If this variable is set to a function, it is used to invoke an external editor in place of `editor_shell_command'. It is called with the filename as the first argument, and optionally the boolean keyword argument $temporary specifying whether the file should be deleted after the editor is closed, and optionally the keyword argument $line specifying a line number to display. The `create_external_editor_launcher' function may be convenient for generating a function suitable for use as the value of this variable.");
define_keyword("$temporary", "$line");
function open_file_with_external_editor(file) {
keywords(arguments);
if (run_external_editor_function) {
yield run_external_editor_function(file, forward_keywords(arguments));
return;
}
var line = arguments.$line;
var cmd = editor_shell_command + " ";
if (line != null)
cmd += "+" + line + " ";
cmd += "\"" + shell_quote(file.path) + "\"";
try {
yield shell_command(cmd);
} finally {
if (arguments.$temporary) {
try {
file.remove(false /* not recursive */);
} catch (e) {}
}
}
}
function create_external_editor_launcher(program, args) {
return function (file) {
keywords(arguments);
var arr = [null].concat(args.slice());
if (arguments.$line != null)
arr.push("+" + arguments.$line);
arr.push(file.path);
try {
yield spawn_and_wait_for_process(program, arr);
} finally {
if (arguments.$temporary) {
try {
file.remove(false);
} catch (e) {}
}
}
};
}
function open_with_external_editor(lspec) {
keywords(arguments);
let [file, temp] = yield download_as_temporary(lspec);
yield open_file_with_external_editor(file, $line = arguments.$line, $temporary = temp);
}
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