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options.js
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// Copyright (c) 2006-2009 by Martin Stubenschrott <[email protected]>
//
// This work is licensed for reuse under an MIT license. Details are
// given in the License.txt file included with this file.
/** @scope modules */
// do NOT create instances of this class yourself, use the helper method
// options.add() instead
/**
* A class representing configuration options. Instances are created by the
* {@link Options} class.
*
* @param {string[]} names The names by which this option is identified.
* @param {string} description A short one line description of the option.
* @param {string} type The option's value data type (see {@link Option#type}).
* @param {string} defaultValue The default value for this option.
* @param {Object} extraInfo An optional extra configuration hash. The
* following properties are supported.
* scope - see {@link Option#scope}
* setter - see {@link Option#setter}
* getter - see {@link Option#getter}
* completer - see {@link Option#completer}
* validator - see {@link Option#validator}
* checkHas - see {@link Option#checkHas}
* @optional
* @private
*/
const Option = Class("Option", {
init: function (names, description, type, defaultValue, extraInfo) {
this.name = names[0];
this.names = names;
this.type = type;
this.description = description;
if (arguments.length > 3)
this.defaultValue = defaultValue;
if (extraInfo)
update(this, extraInfo);
// add no{option} variant of boolean {option} to this.names
if (this.type == "boolean") {
this.names = array(Object.keys(names)
.map(k => [names[k], "no" + names[k]]))
.flatten().__proto__;
}
if (this.globalValue == undefined)
this.globalValue = this.defaultValue;
},
/** @property {value} The option's global value. @see #scope */
get globalValue() options.store.get(this.name),
set globalValue(val) { options.store.set(this.name, val); },
/**
* Returns <b>value</b> as an array of parsed values if the option type is
* "charlist" or "stringlist" or else unchanged.
*
* @param {value} value The option value.
* @returns {value|string[]}
*/
parseValues: function (value) {
if (this.type == "stringlist")
return (value === "") ? [] : value.split(",");
if (this.type == "charlist")
return Array.slice(value);
return value;
},
/**
* Returns <b>values</b> packed in the appropriate format for the option
* type.
*
* @param {value|string[]} values The option value.
* @returns {value}
*/
joinValues: function (values) {
if (this.type == "stringlist")
return values.join(",");
if (this.type == "charlist")
return values.join("");
return values;
},
/** @property {value|string[]} The option value or array of values. */
get values() this.parseValues(this.value),
set values(values) this.setValues(values, this.scope),
/**
* Returns the option's value as an array of parsed values if the option
* type is "charlist" or "stringlist" or else the simple value.
*
* @param {number} scope The scope to return these values from (see
* {@link Option#scope}).
* @returns {value|string[]}
*/
getValues: function (scope) this.parseValues(this.get(scope)),
/**
* Sets the option's value from an array of values if the option type is
* "charlist" or "stringlist" or else the simple value.
*
* @param {number} scope The scope to apply these values to (see
* {@link Option#scope}).
*/
setValues: function (values, scope) {
this.set(this.joinValues(values), scope || this.scope);
},
/**
* Returns the value of the option in the specified <b>scope</b>. The
* (@link Option#getter) callback, if it exists, is invoked with this value
* before it is returned.
*
* @param {number} scope The scope to return this value from (see
* {@link Option#scope}).
* @returns {value}
*/
get: function (scope) {
if (scope) {
if ((scope & this.scope) == 0) // option doesn't exist in this scope
return null;
}
else
scope = this.scope;
let value;
// Options with a custom getter are always responsible for returning a meaningful value
if (this.getter)
return liberator.trapErrors(this.getter, this, value);
if (liberator.has("tabs") && (scope & Option.SCOPE_LOCAL))
value = tabs.options[this.name];
if ((scope & Option.SCOPE_GLOBAL) && (value == undefined))
value = this.globalValue;
return value;
},
/**
* Sets the option value to <b>newValue</b> for the specified <b>scope</b>.
* The (@link Option#setter) callback, if it exists, is invoked with
* <b>newValue</b>.
*
* @param {value} newValue The option's new value.
* @param {number} scope The scope to apply this value to (see
* {@link Option#scope}).
*/
set: function (newValue, scope) {
scope = scope || this.scope;
if ((scope & this.scope) == 0) // option doesn't exist in this scope
return;
if (this.setter)
newValue = liberator.trapErrors(this.setter, this, newValue);
if (liberator.has("tabs") && (scope & Option.SCOPE_LOCAL))
tabs.options[this.name] = newValue;
if ((scope & Option.SCOPE_GLOBAL) && newValue != this.globalValue)
this.globalValue = newValue;
this.hasChanged = true;
},
/**
* @property {value} The option's current value. The option's local value,
* or if no local value is set, this is equal to the
* (@link #globalValue).
*/
get value() this.get(),
set value(val) this.set(val),
/**
* Returns whether the option value contains one or more of the specified
* arguments.
*
* @returns {boolean}
*/
has: function () {
let self = this;
let test = function (val) values.indexOf(val) >= 0;
if (this.checkHas)
test = function (val) values.some(function (value) self.checkHas(value, val));
let values = this.values;
// return whether some argument matches
return Array.some(arguments, function (val) test(val));
},
/**
* Returns whether this option is identified by <b>name</b>.
*
* @param {string} name
* @returns {boolean}
*/
hasName: function (name) this.names.indexOf(name) >= 0,
/**
* Returns whether the specified <b>values</b> are valid for this option.
* @see Option#validator
*/
isValidValue: function (vs) this.validator(vs),
/**
* Resets the option to its default value.
*/
reset: function () {
this.value = this.defaultValue;
},
/**
* Sets the option's value using the specified set <b>operator</b>.
*
* @param {string} operator The set operator.
* @param {value|string[]} values The value (or values) to apply.
* @param {number} scope The scope to apply this value to (see
* {@link #scope}).
* @param {boolean} invert Whether this is an invert boolean operation.
*/
op: function (operator, values, scope, invert) {
let newValue = null;
let self = this;
switch (this.type) {
case "boolean":
if (operator != "=")
break;
if (invert)
newValue = !this.value;
else
newValue = values;
break;
case "number":
// TODO: support floats? Validators need updating.
if (!/^[+-]?(?:0x[0-9a-f]+|0[0-7]+|0|[1-9]\d*)$/i.test(values))
return "Number required after := " + this.name + "=" + values;
let value = parseInt(values/* deduce radix */);
switch (operator) {
case "+":
newValue = this.value + value;
break;
case "-":
newValue = this.value - value;
break;
case "^":
newValue = this.value * value;
break;
case "=":
newValue = value;
break;
}
break;
case "charlist":
case "stringlist":
values = Array.concat(values);
switch (operator) {
case "+":
newValue = util.Array.uniq(Array.concat(this.values, values), true);
break;
case "^":
// NOTE: Vim doesn't prepend if there's a match in the current value
newValue = util.Array.uniq(Array.concat(values, this.values), true);
break;
case "-":
newValue = this.values.filter(function (item) values.indexOf(item) == -1);
break;
case "=":
newValue = values;
if (invert) {
let keepValues = this.values.filter(function (item) values.indexOf(item) == -1);
let addValues = values.filter(function (item) self.values.indexOf(item) == -1);
newValue = addValues.concat(keepValues);
}
break;
}
break;
case "string":
switch (operator) {
case "+":
newValue = this.value + values;
break;
case "-":
newValue = this.value.replace(values, "");
break;
case "^":
newValue = values + this.value;
break;
case "=":
newValue = values;
break;
}
break;
default:
return "Internal error: option type `" + this.type + "' not supported";
}
if (newValue == null)
return "Operator " + operator + " not supported for option type " + this.type;
if (!this.isValidValue(newValue))
return "Invalid argument: " + values;
this.setValues(newValue, scope);
return null;
},
// Properties {{{2
/** @property {string} The option's canonical name. */
name: null,
/** @property {string[]} All names by which this option is identified. */
names: null,
/**
* @property {string} The option's data type. One of:
* "boolean" - Boolean E.g. true
* "number" - Integer E.g. 1
* "string" - String E.g. "Vimperator"
* "charlist" - Character list E.g. "rb"
* "stringlist" - String list E.g. "homepage,quickmark,tabopen,paste"
*/
type: null,
/**
* @property {number} The scope of the option. This can be local, global,
* or both.
* @see Option#SCOPE_LOCAL
* @see Option#SCOPE_GLOBAL
* @see Option#SCOPE_BOTH
*/
scope: 1, // Option.SCOPE_GLOBAL // XXX set to BOTH by default someday? - kstep
/**
* @property {string} This option's description, as shown in :usage.
*/
description: "",
/**
* @property {value} The option's default value. This value will be used
* unless the option is explicitly set either interactively or in an RC
* file or plugin.
*/
defaultValue: null,
/**
* @property {function} The function called when the option value is set.
*/
setter: null,
/**
* @property {function} The function called when the option value is read.
*/
getter: null,
/**
* @property {function(CompletionContext, Args)} This option's completer.
* @see CompletionContext
*/
completer: null,
/**
* @property {function} The function called to validate the option's value
* when set.
*/
validator: function () {
if (this.completer)
return Option.validateCompleter.apply(this, arguments);
return true;
},
/**
* @property The function called to determine whether the option already
* contains a specified value.
* @see #has
*/
checkHas: null,
/**
* @property {boolean} Set to true whenever the option is first set. This
* is useful to see whether it was changed from its default value
* interactively or by some RC file.
*/
hasChanged: false,
/**
* @property {nsIFile} The script in which this option was last set. null
* implies an interactive command.
*/
setFrom: null
}, {
/**
* @property {number} Global option scope.
* @final
*/
SCOPE_GLOBAL: 1,
/**
* @property {number} Local option scope. Options in this scope only
* apply to the current tab/buffer.
* @final
*/
SCOPE_LOCAL: 2,
/**
* @property {number} Both local and global option scope.
* @final
*/
SCOPE_BOTH: 3,
// TODO: Run this by default?
/**
* Validates the specified <b>values</b> against values generated by the
* option's completer function.
*
* @param {value|string[]} values The value or array of values to validate.
* @returns {boolean}
*/
validateCompleter: function (values) {
let context = CompletionContext("");
let res = context.fork("", 0, this, this.completer);
if (!res)
res = context.allItems.items.map(function (item) [item.text]);
return Array.concat(values).every(function (value) res.some(function (item) item[0] == value));
}
});
/**
* @instance options
*/
const Options = Module("options", {
requires: ["config", "highlight", "storage"],
init: function () {
this._optionHash = {};
this._prefContexts = [];
for (let pref of this.allPrefs(Options.OLD_SAVED)) {
let saved = Options.SAVED + pref.substr(Options.OLD_SAVED.length)
if (!this.getPref(saved))
this.setPref(saved, this.getPref(pref));
this.resetPref(pref);
}
// Host application preferences which need to be changed to work well with
//
// Work around the popup blocker
// TODO: Make this work like safeSetPref
var popupAllowedEvents = this._loadPreference("dom.popup_allowed_events", "change click dblclick mouseup reset submit");
if (!/keypress/.test(popupAllowedEvents)) {
this._storePreference("dom.popup_allowed_events", popupAllowedEvents + " keypress");
liberator.registerObserver("shutdown", function () {
if (this._loadPreference("dom.popup_allowed_events", "") == popupAllowedEvents + " keypress")
this._storePreference("dom.popup_allowed_events", popupAllowedEvents);
});
}
function optionObserver(key, event, option) {
// Trigger any setters.
let opt = options.get(option);
if (event == "change" && opt)
opt.set(opt.globalValue, Option.SCOPE_GLOBAL);
}
storage.newMap("options", { store: false });
storage.addObserver("options", optionObserver, window);
this.prefObserver.register();
},
destroy: function () {
this.prefObserver.unregister();
},
/** @property {Iterator(Option)} @private */
__iterator__: function () {
let sorted = Object.keys(this._optionHash)
.map(i => this._optionHash[i])
.sort(function (a, b) String.localeCompare(a.name, b.name));
return iter(sorted);
},
/** @property {Object} Observes preference value changes. */
prefObserver: {
register: function () {
// better way to monitor all changes?
this._branch = services.get("prefs").getBranch("").QueryInterface(Ci.nsIPrefBranch2);
this._branch.addObserver("", this, false);
},
unregister: function () {
if (this._branch)
this._branch.removeObserver("", this);
},
observe: function (subject, topic, data) {
if (topic != "nsPref:changed")
return;
// subject is the nsIPrefBranch we're observing (after appropriate QI)
// data is the name of the pref that's been changed (relative to subject)
switch (data) {
case "accessibility.browsewithcaret":
let value = options.getPref("accessibility.browsewithcaret", false);
liberator.mode = value ? modes.CARET : modes.NORMAL;
break;
}
}
},
/**
* Adds a new option.
*
* @param {string[]} names All names for the option.
* @param {string} description A description of the option.
* @param {string} type The option type (see {@link Option#type}).
* @param {value} defaultValue The option's default value.
* @param {Object} extra An optional extra configuration hash (see
* {@link Map#extraInfo}).
* @optional
* @returns {Option} Returns the instance of Option, if the option was created.
*/
add: function (names, description, type, defaultValue, extraInfo) {
if (!extraInfo)
extraInfo = {};
let option = Option(names, description, type, defaultValue, extraInfo);
if (!option)
return false;
if (option.name in this._optionHash) {
// never replace for now
liberator.echomsg("Option '" + JSON.stringify(names[0]) + "' already exists, NOT replacing existing option.");
return false;
}
// quickly access options with options["wildmode"]:
this.__defineGetter__(option.name, function () option.value);
this.__defineSetter__(option.name, function (value) { option.value = value; });
this._optionHash[option.name] = option;
return option;
},
/**
* Returns the names of all preferences.
*
* @param {string} branch The branch in which to search preferences.
* @default ""
*/
allPrefs: function (branch) services.get("prefs").getChildList(branch || "", { value: 0 }),
/**
* Returns the option with <b>name</b> in the specified <b>scope</b>.
*
* @param {string} name The option's name.
* @param {number} scope The option's scope (see {@link Option#scope}).
* @optional
* @returns {Option} The matching option.
*/
get: function (name, scope) {
if (!scope)
scope = Option.SCOPE_BOTH;
if (name in this._optionHash)
return (this._optionHash[name].scope & scope) && this._optionHash[name];
for (let opt in options) {
if (opt.hasName(name))
return (opt.scope & scope) && opt;
}
return null;
},
/**
* Lists all options in <b>scope</b> or only those with changed values
* if <b>onlyNonDefault</b> is specified.
*
* @param {boolean} onlyNonDefault Limit the list to prefs with a
* non-default value.
* @param {number} scope Only list options in this scope (see
* {@link Option#scope}).
*/
list: function (onlyNonDefault, scope) {
if (!scope)
scope = Option.SCOPE_BOTH;
function opts(opt) {
for (let opt in options) {
let option = {
isDefault: opt.value == opt.defaultValue,
name: opt.name,
default: opt.defaultValue,
pre: "\u00a0\u00a0", // Unicode nonbreaking space.
value: xml``
};
if (onlyNonDefault && option.isDefault)
continue;
if (!(opt.scope & scope))
continue;
if (opt.type == "boolean") {
if (!opt.value)
option.pre = "no";
option.default = (option.default ? "" : "no") + opt.name;
}
else
option.value = xml`=${template.highlight(opt.value)}`;
yield option;
}
}
let list = template.options("Options", opts());
commandline.echo(list, commandline.HL_NORMAL, commandline.FORCE_MULTILINE);
},
/**
* Lists all preferences matching <b>filter</b> or only those with
* changed values if <b>onlyNonDefault</b> is specified.
*
* @param {boolean} onlyNonDefault Limit the list to prefs with a
* non-default value.
* @param {string} filter The list filter. A null filter lists all
* prefs.
* @optional
*/
listPrefs: function (onlyNonDefault, filter) {
if (!filter)
filter = "";
let prefArray = options.allPrefs();
prefArray.sort();
function prefs() {
for (let pref of prefArray) {
let userValue = services.get("prefs").prefHasUserValue(pref);
if (onlyNonDefault && !userValue || pref.indexOf(filter) == -1)
continue;
value = options.getPref(pref);
let option = {
isDefault: !userValue,
default: options._loadPreference(pref, null, true),
value: xml`${template.highlight(value, true, 100)}`,
name: pref,
pre: "\u00a0\u00a0" // Unicode nonbreaking space.
};
yield option;
}
}
let list = template.options(config.hostApplication + " Options", prefs());
commandline.echo(list, commandline.HL_NORMAL, commandline.FORCE_MULTILINE);
},
/**
* Parses a :set command's argument string.
*
* @param {string} args The :set command's argument string.
* @param {Object} modifiers A hash of parsing modifiers. These are:
* scope - see {@link Option#scope}
* @optional
* @returns {Object} The parsed command object.
*/
parseOpt: function parseOpt(args, modifiers) {
let ret = {};
let matches, prefix, postfix, valueGiven;
[matches, prefix, ret.name, postfix, valueGiven, ret.operator, ret.value] =
args.match(/^\s*(no|inv)?([a-z_]*)([?&!])?\s*(([-+^]?)=(.*))?\s*$/) || [];
ret.args = args;
ret.onlyNonDefault = false; // used for :set to print non-default options
if (!args) {
ret.name = "all";
ret.onlyNonDefault = true;
}
if (matches)
ret.option = options.get(ret.name, ret.scope);
ret.prefix = prefix;
ret.postfix = postfix;
ret.all = (ret.name == "all");
ret.get = (ret.all || postfix == "?" || (ret.option && ret.option.type != "boolean" && !valueGiven));
ret.invert = (prefix == "inv" || postfix == "!");
ret.reset = (postfix == "&");
ret.unsetBoolean = (prefix == "no");
ret.scope = modifiers && modifiers.scope;
if (!ret.option)
return ret;
if (ret.value === undefined)
ret.value = "";
ret.optionValue = ret.option.get(ret.scope);
ret.optionValues = ret.option.getValues(ret.scope);
ret.values = ret.option.parseValues(ret.value);
return ret;
},
/**
* Remove the option with matching <b>name</b>.
*
* @param {string} name The name of the option to remove. This can be
* any of the options' names.
*/
remove: function (name) {
for (let option of this._optionHash) {
if (option.hasName(name))
delete this._optionHash[option.name];
}
},
/** @property {Object} The options store. */
get store() storage.options,
/**
* Returns the value of the preference <b>name</b>.
*
* @param {string} name The preference name.
* @param {value} forcedDefault The default value for this
* preference. Used for internal liberator preferences.
*/
getPref: function (name, forcedDefault) {
return this._loadPreference(name, forcedDefault);
},
/**
* Sets the preference <b>name</b> to </b>value</b> but warns the user
* if the value is changed from its default.
*
* @param {string} name The preference name.
* @param {value} value The new preference value.
*/
// FIXME: Well it used to. I'm looking at you mst! --djk
safeSetPref: function (name, value, message) {
let val = this._loadPreference(name, null, false);
let def = this._loadPreference(name, null, true);
let lib = this._loadPreference(Options.SAVED + name);
if (lib == null && val != def || val != lib) {
let msg = "Warning: setting preference " + name + ", but it's changed from its default value.";
if (message)
msg += " " + message;
liberator.echomsg(msg);
}
this._storePreference(name, value);
this._storePreference(Options.SAVED + name, value);
},
/**
* Sets the preference <b>name</b> to </b>value</b>.
*
* @param {string} name The preference name.
* @param {value} value The new preference value.
*/
setPref: function (name, value) {
this._storePreference(name, value);
},
/**
* Resets the preference <b>name</b> to its default value.
*
* @param {string} name The preference name.
*/
resetPref: function (name) {
try {
services.get("prefs").clearUserPref(name);
}
catch (e) {
// ignore - thrown if not a user set value
}
},
/**
* Toggles the value of the boolean preference <b>name</b>.
*
* @param {string} name The preference name.
*/
invertPref: function (name) {
if (services.get("prefs").getPrefType(name) == Ci.nsIPrefBranch.PREF_BOOL)
this.setPref(name, !this.getPref(name));
else
liberator.echoerr("Trailing characters: " + name + "!");
},
/**
* Pushes a new preference context onto the context stack.
*
* @see #withContext
*/
pushContext: function () {
this._prefContexts.push({});
},
/**
* Pops the top preference context from the stack.
*
* @see #withContext
*/
popContext: function () {
for (let [k, v] in Iterator(this._prefContexts.pop()))
this._storePreference(k, v);
},
/**
* Executes <b>func</b> with a new preference context. When <b>func</b>
* returns, the context is popped and any preferences set via
* {@link #setPref} or {@link #invertPref} are restored to their
* previous values.
*
* @param {function} func The function to call.
* @param {Object} func The 'this' object with which to call <b>func</b>
* @see #pushContext
* @see #popContext
*/
withContext: function (func, self) {
try {
this.pushContext();
return func.call(self);
}
finally {
this.popContext();
}
},
_storePreference: function (name, value) {
if (this._prefContexts.length) {
let val = this._loadPreference(name, null);
if (val != null)
this._prefContexts[this._prefContexts.length - 1][name] = val;
}
let type = services.get("prefs").getPrefType(name);
switch (typeof value) {
case "string":
if (type == Ci.nsIPrefBranch.PREF_INVALID || type == Ci.nsIPrefBranch.PREF_STRING) {
let supportString = Cc["@mozilla.org/supports-string;1"].createInstance(Ci.nsISupportsString);
supportString.data = value;
services.get("prefs").setComplexValue(name, Ci.nsISupportsString, supportString);
}
else if (type == Ci.nsIPrefBranch.PREF_INT)
liberator.echoerr("Number required after =: " + name + "=" + value);
else
liberator.echoerr("Invalid argument: " + name + "=" + value);
break;
case "number":
if (type == Ci.nsIPrefBranch.PREF_INVALID || type == Ci.nsIPrefBranch.PREF_INT)
services.get("prefs").setIntPref(name, value);
else
liberator.echoerr("Invalid argument: " + name + "=" + value);
break;
case "boolean":
if (type == Ci.nsIPrefBranch.PREF_INVALID || type == Ci.nsIPrefBranch.PREF_BOOL)
services.get("prefs").setBoolPref(name, value);
else if (type == Ci.nsIPrefBranch.PREF_INT)
liberator.echoerr("Number required after =: " + name + "=" + value);
else
liberator.echoerr("Invalid argument: " + name + "=" + value);
break;
default:
liberator.echoerr("Unknown preference type: " + typeof value + " (" + name + "=" + value + ")");
}
},
_loadPreference: function (name, forcedDefault, defaultBranch) {
let defaultValue = null; // XXX
if (forcedDefault != null) // this argument sets defaults for non-user settable options (like extensions.history.comp_history)
defaultValue = forcedDefault;
let branch = defaultBranch ? services.get("prefs").getDefaultBranch("") : services.get("prefs");
let type = services.get("prefs").getPrefType(name);
try {
switch (type) {
case Ci.nsIPrefBranch.PREF_STRING:
let value = branch.getComplexValue(name, Ci.nsISupportsString).data;
// try in case it's a localized string (will throw an exception if not)
if (!services.get("prefs").prefIsLocked(name) && !services.get("prefs").prefHasUserValue(name) &&
RegExp("chrome://.+/locale/.+\\.properties").test(value))
value = branch.getComplexValue(name, Ci.nsIPrefLocalizedString).data;
return value;
case Ci.nsIPrefBranch.PREF_INT:
return branch.getIntPref(name);
case Ci.nsIPrefBranch.PREF_BOOL:
return branch.getBoolPref(name);
default:
return defaultValue;
}
}
catch (e) {
return defaultValue;
}
}
}, {
SAVED: "extensions.liberator.saved.",
OLD_SAVED: "liberator.saved."
}, {
commandline: function () {
// TODO: maybe reset in .destroy()?
// TODO: move to buffer.js
// we have our own typeahead find implementation
// See: https://bugzilla.mozilla.org/show_bug.cgi?id=348187
options.safeSetPref("accessibility.typeaheadfind.autostart", false);
options.safeSetPref("accessibility.typeaheadfind", false); // actually the above setting should do it, but has no effect in Firefox
},
commands: function () {
function setAction(args, modifiers) {
let bang = args.bang;
if (!args.length)
args[0] = "";
for (let [, arg] in args) {
if (bang) {
let onlyNonDefault = false;
let reset = false;
let invertBoolean = false;
if (args[0] == "") {
var name = "all";
onlyNonDefault = true;
}
else {
var [matches, name, postfix, valueGiven, operator, value] =
arg.match(/^\s*?([a-zA-Z0-9\.\-_{}]+)([?&!])?\s*(([-+^]?)=(.*))?\s*$/);
reset = (postfix == "&");
invertBoolean = (postfix == "!");
}
if (name == "all" && reset)
commandline.input("Warning: Resetting all preferences may make " + config.hostApplication + " unusable. Continue (yes/[no]): ",
function (resp) {
if (resp == "yes")
for (let pref of values(options.allPrefs()))
options.resetPref(pref);
},
{ promptHighlight: "WarningMsg" });
else if (name == "all")
options.listPrefs(onlyNonDefault, "");
else if (reset)
options.resetPref(name);
else if (invertBoolean)
options.invertPref(name);
else if (valueGiven) {
switch (value) {
case undefined:
value = "";
break;
case "true":
value = true;
break;
case "false":
value = false;
break;
default:
if (/^[+-]?\d+$/.test(value))
value = parseInt(value, 10);
}
options.setPref(name, value);
}
else
options.listPrefs(onlyNonDefault, name);
return;
}
let opt = options.parseOpt(arg, modifiers);
liberator.assert(opt, "Error parsing :set command: " + arg);
let option = opt.option;
liberator.assert(option != null || opt.all,
"Unknown option: " + opt.name);
// reset a variable to its default value
if (opt.reset) {
if (opt.all) {
for (let option in options)
option.reset();
}
else {
option.setFrom = modifiers.setFrom || null;
option.reset();
}
}
// read access
else if (opt.get) {