pjs/extensions/venkman/resources/content/command-manager.js

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JavaScript

/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*-
*
* ***** BEGIN LICENSE BLOCK *****
* Version: MPL 1.1/GPL 2.0/LGPL 2.1
*
* The contents of this file are subject to the Mozilla Public License Version
* 1.1 (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
* http://www.mozilla.org/MPL/
*
* Software distributed under the License is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
* for the specific language governing rights and limitations under the
* License.
*
* The Original Code is JSIRC Library.
*
* The Initial Developer of the Original Code is
* New Dimensions Consulting, Inc.
* Portions created by the Initial Developer are Copyright (C) 1999
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
* Robert Ginda, rginda@ndcico.com, original author
*
* Alternatively, the contents of this file may be used under the terms of
* either the GNU General Public License Version 2 or later (the "GPL"), or
* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
* in which case the provisions of the GPL or the LGPL are applicable instead
* of those above. If you wish to allow use of your version of this file only
* under the terms of either the GPL or the LGPL, and not to allow others to
* use your version of this file under the terms of the MPL, indicate your
* decision by deleting the provisions above and replace them with the notice
* and other provisions required by the GPL or the LGPL. If you do not delete
* the provisions above, a recipient may use your version of this file under
* the terms of any one of the MPL, the GPL or the LGPL.
*
* ***** END LICENSE BLOCK ***** */
function getAccessKey (str)
{
var i = str.indexOf("&");
if (i == -1)
return "";
return str[i + 1];
}
function CommandRecord (name, func, usage, help, label, flags, keystr, tip)
{
this.name = name;
this.func = func;
this._usage = usage;
this.scanUsage();
this.help = help;
this.label = label ? label : name;
this.labelstr = label.replace ("&", "");
this.tip = tip;
this.flags = flags;
this._enabled = true;
this.keyNodes = new Array();
this.keystr = keystr;
this.uiElements = new Array();
}
CommandRecord.prototype.__defineGetter__ ("enabled", cr_getenable);
function cr_getenable ()
{
return this._enabled;
}
CommandRecord.prototype.__defineSetter__ ("enabled", cr_setenable);
function cr_setenable (state)
{
for (var i = 0; i < this.uiElements.length; ++i)
{
if (state)
this.uiElements[i].removeAttribute ("disabled");
else
this.uiElements[i].setAttribute ("disabled", "true");
}
return (this._enabled = state);
}
CommandRecord.prototype.__defineSetter__ ("usage", cr_setusage);
function cr_setusage (usage)
{
this._usage = usage;
this.scanUsage();
}
CommandRecord.prototype.__defineGetter__ ("usage", cr_getusage);
function cr_getusage()
{
return this._usage;
}
/**
* Internal use only.
*
* Scans the argument spec, in the format "<a1> <a2> [<o1> <o2>]", into an
* array of strings.
*/
CommandRecord.prototype.scanUsage =
function cr_scanusage()
{
var spec = this._usage;
var currentName = "";
var inName = false;
var len = spec.length;
var capNext = false;
this._usage = spec;
this.argNames = new Array();
for (var i = 0; i < len; ++i)
{
switch (spec[i])
{
case '[':
this.argNames.push (":");
break;
case '<':
inName = true;
break;
case '-':
capNext = true;
break;
case '>':
inName = false;
this.argNames.push (currentName);
currentName = "";
capNext = false;
break;
default:
if (inName)
currentName += capNext ? spec[i].toUpperCase() : spec[i];
capNext = false;
break;
}
}
}
/**
* Returns the command formatted for presentation as part of online
* documentation.
*/
CommandRecord.prototype.getDocumentation =
function cr_getdocs(flagFormatter)
{
var str;
str = getMsg(MSN_DOC_COMMANDLABEL,
[this.label.replace("&", ""), this.name]) + "\n";
str += getMsg(MSN_DOC_KEY, this.keystr ? this.keystr : MSG_VAL_NA) + "\n";
str += getMsg(MSN_DOC_SYNTAX, [this.name, this.usage]) + "\n";
str += MSG_DOC_NOTES + "\n";
str += (flagFormatter ? flagFormatter(this.flags) : this.flags) + "\n\n";
str += MSG_DOC_DESCRIPTION + "\n";
str += wrapText(this.help, 75) + "\n";
return str;
}
CommandRecord.prototype.argNames = new Array();
function CommandManager (defaultBundle)
{
this.commands = new Object();
this.defaultBundle = defaultBundle;
}
CommandManager.prototype.defineCommands =
function cmgr_defcmds (cmdary)
{
var len = cmdary.length;
var commands = new Object();
var bundle = ("stringBundle" in cmdary ?
cmdary.stringBundle :
this.defaultBundle);
for (var i = 0; i < len; ++i)
{
var name = cmdary[i][0];
var func = cmdary[i][1];
var flags = cmdary[i][2];
var usage = getMsgFrom(bundle, "cmd." + name + ".params", null, "");
var helpDefault;
var labelDefault = name;
var aliasFor;
if (flags & CMD_NO_HELP)
helpDefault = MSG_NO_HELP;
if (typeof func == "string")
{
var ary = func.match(/(\S+)/);
if (ary)
aliasFor = ary[1];
else
aliasFor = null;
helpDefault = getMsg (MSN_DEFAULT_ALIAS_HELP, func);
if (aliasFor)
labelDefault = getMsgFrom (bundle, "cmd." + aliasFor + ".label",
null, name);
}
var label = getMsgFrom(bundle, "cmd." + name + ".label", null,
labelDefault);
var help = getMsgFrom(bundle, "cmd." + name + ".help", null,
helpDefault);
var keystr = getMsgFrom (bundle, "cmd." + name + ".key", null, "");
var tip = getMsgFrom (bundle, "cmd." + name + ".tip", null, "");
var command = new CommandRecord (name, func, usage, help, label, flags,
keystr, tip);
if (aliasFor)
command.aliasFor = aliasFor;
this.addCommand(command);
commands[name] = command;
}
return commands;
}
CommandManager.prototype.installKeys =
function cmgr_instkeys (document, commands)
{
var parentElem = document.getElementById("dynamic-keys");
if (!parentElem)
{
parentElem = document.createElement("keyset");
parentElem.setAttribute ("id", "dynamic-keys");
document.firstChild.appendChild (parentElem);
}
if (!commands)
commands = this.commands;
for (var c in commands)
this.installKey (parentElem, commands[c]);
}
/**
* Create a <key> node relative to a DOM node. Usually called once per command,
* per document, so that accelerator keys work in all application windows.
*
* @param parentElem A reference to the DOM node which should contain the new
* <key> node.
* @param command reference to the CommandRecord to install.
*/
CommandManager.prototype.installKey =
function cmgr_instkey (parentElem, command)
{
if (!command.keystr)
return;
var ary = command.keystr.match (/(.*\s)?([\S]+)$/);
if (!ASSERT(ary, "couldn't parse key string ``" + command.keystr +
"'' for command ``" + command.name + "''"))
{
return;
}
var key = document.createElement ("key");
key.setAttribute ("id", "key:" + command.name);
key.setAttribute ("oncommand", "dispatch('" + command.name +
"', {isInteractive: true});");
if (ary[1])
key.setAttribute ("modifiers", ary[1]);
if (ary[2].indexOf("VK_") == 0)
key.setAttribute ("keycode", ary[2]);
else
key.setAttribute ("key", ary[2]);
parentElem.appendChild(key);
command.keyNodes.push(key);
}
CommandManager.prototype.uninstallKeys =
function cmgr_uninstkeys (commands)
{
if (!commands)
commands = this.commands;
for (var c in commands)
this.uninstallKey (commands[c]);
}
CommandManager.prototype.uninstallKey =
function cmgr_uninstkey (command)
{
for (var i in command.keyNodes)
{
try
{
/* document may no longer exist in a useful state. */
command.keyNodes[i].parentNode.removeChild(command.keyNodes[i]);
}
catch (ex)
{
dd ("*** caught exception uninstalling key node: " + ex);
}
}
}
/**
* Register a new command with the manager.
*/
CommandManager.prototype.addCommand =
function cmgr_add (command)
{
this.commands[command.name] = command;
}
CommandManager.prototype.removeCommands =
function cmgr_removes (commands)
{
for (var c in commands)
this.removeCommand(commands[c]);
}
CommandManager.prototype.removeCommand =
function cmgr_remove (command)
{
delete this.commands[command.name];
}
/**
* Register a hook for a particular command name. |id| is a human readable
* identifier for the hook, and can be used to unregister the hook. If you
* re-use a hook id, the previous hook function will be replaced.
* If |before| is |true|, the hook will be called *before* the command executes,
* if |before| is |false|, or not specified, the hook will be called *after*
* the command executes.
*/
CommandManager.prototype.addHook =
function cmgr_hook (commandName, func, id, before)
{
if (!ASSERT(commandName in this.commands,
"Unknown command '" + commandName + "'"))
{
return;
}
var command = this.commands[commandName];
if (before)
{
if (!("beforeHooks" in command))
command.beforeHooks = new Object();
command.beforeHooks[id] = func;
}
else
{
if (!("afterHooks" in command))
command.afterHooks = new Object();
command.afterHooks[id] = func;
}
}
CommandManager.prototype.addHooks =
function cmgr_hooks (hooks, prefix)
{
if (!prefix)
prefix = "";
for (var h in hooks)
{
this.addHook(h, hooks[h], prefix + ":" + h,
("_before" in hooks[h]) ? hooks[h]._before : false);
}
}
CommandManager.prototype.removeHooks =
function cmgr_remhooks (hooks, prefix)
{
if (!prefix)
prefix = "";
for (var h in hooks)
{
this.removeHook(h, prefix + ":" + h,
("before" in hooks[h]) ? hooks[h].before : false);
}
}
CommandManager.prototype.removeHook =
function cmgr_unhook (commandName, id, before)
{
var command = this.commands[commandName];
if (before)
delete command.beforeHooks[id];
else
delete command.afterHooks[id];
}
/**
* Return an array of all CommandRecords which start with the string
* |partialName|, sorted by |label| property.
*
* @param partialName Prefix to search for.
* @param flags logical ANDed with command flags.
* @returns array Array of matching commands, sorted by |label| property.
*/
CommandManager.prototype.list =
function cmgr_list (partialName, flags)
{
/* returns array of command objects which look like |partialName|, or
* all commands if |partialName| is not specified */
function compare (a, b)
{
a = a.labelstr.toLowerCase();
b = b.labelstr.toLowerCase();
if (a == b)
return 0;
if (a > b)
return 1;
return -1;
}
var ary = new Array();
var commandNames = keys(this.commands);
/* a command named "eval" wouldn't show up in the result of keys() because
* eval is not-enumerable, even if overwritten. */
if ("eval" in this.commands && typeof this.commands.eval == "object")
commandNames.push ("eval");
for (var i in commandNames)
{
var name = commandNames[i];
if (!flags || (this.commands[name].flags & flags))
{
if (!partialName ||
this.commands[name].name.indexOf(partialName) == 0)
{
if (partialName &&
partialName.length == this.commands[name].name.length)
{
/* exact match */
return [this.commands[name]];
}
else
{
ary.push (this.commands[name]);
}
}
}
}
ary.sort(compare);
return ary;
}
/**
* Return a sorted array of the command names which start with the string
* |partialName|.
*
* @param partialName Prefix to search for.
* @param flags logical ANDed with command flags.
* @returns array Sorted Array of matching command names.
*/
CommandManager.prototype.listNames =
function cmgr_listnames (partialName, flags)
{
var cmds = this.list(partialName, flags);
var cmdNames = new Array();
for (var c in cmds)
cmdNames.push (cmds[c].name);
cmdNames.sort();
return cmdNames;
}
/**
* Internal use only.
*
* Called to parse the arguments stored in |e.inputData|, as properties of |e|,
* for the CommandRecord stored on |e.command|.
*
* @params e Event object to be processed.
*/
CommandManager.prototype.parseArguments =
function cmgr_parseargs (e)
{
var rv = this.parseArgumentsRaw(e);
//dd("parseArguments '" + e.command.usage + "' " +
// (rv ? "passed" : "failed") + "\n" + dumpObjectTree(e));
delete e.currentArgIndex;
return rv;
}
/**
* Internal use only.
*
* Don't call parseArgumentsRaw directly, use parseArguments instead.
*
* Parses the arguments stored in the |inputData| property of the event object,
* according to the format specified by the |command| property.
*
* On success this method returns true, and propery names corresponding to the
* argument names used in the format spec will be created on the event object.
* All optional parameters will be initialized to |null| if not already present
* on the event.
*
* On failure this method returns false and a description of the problem
* will be stored in the |parseError| property of the event.
*
* For example...
* Given the argument spec "<int> <word> [ <word2> <word3> ]", and given the
* input string "411 foo", stored as |e.command.usage| and |e.inputData|
* respectively, this method would add the following propertys to the event
* object...
* -name---value--notes-
* e.int 411 Parsed as an integer
* e.word foo Parsed as a string
* e.word2 null Optional parameters not specified will be set to null.
* e.word3 null If word2 had been provided, word3 would be required too.
*
* Each parameter is parsed by calling the function with the same name, located
* in this.argTypes. The first parameter is parsed by calling the function
* this.argTypes["int"], for example. This function is expected to act on
* e.unparsedData, taking it's chunk, and leaving the rest of the string.
* The default parse functions are...
* <word> parses contiguous non-space characters.
* <int> parses as an int.
* <rest> parses to the end of input data.
* <state> parses yes, on, true, 1, 0, false, off, no as a boolean.
* <toggle> parses like a <state>, except allows "toggle" as well.
* <...> parses according to the parameter type before it, until the end
* of the input data. Results are stored in an array named
* paramnameList, where paramname is the name of the parameter
* before <...>. The value of the parameter before this will be
* paramnameList[0].
*
* If there is no parse function for an argument type, "word" will be used by
* default. You can alias argument types with code like...
* commandManager.argTypes["my-integer-name"] = commandManager.argTypes["int"];
*/
CommandManager.prototype.parseArgumentsRaw =
function parse_parseargsraw (e)
{
var argc = e.command.argNames.length;
function initOptionals()
{
for (var i = 0; i < argc; ++i)
{
if (e.command.argNames[i] != ":" &&
e.command.argNames[i] != "..." &&
!(e.command.argNames[i] in e))
{
e[e.command.argNames[i]] = null;
}
}
}
if ("inputData" in e && e.inputData)
{
/* if data has been provided, parse it */
e.unparsedData = e.inputData;
var parseResult;
var currentArg;
e.currentArgIndex = 0;
if (argc)
{
currentArg = e.command.argNames[e.currentArgIndex];
while (e.unparsedData)
{
if (currentArg != ":")
{
if (!this.parseArgument (e, currentArg))
return false;
}
if (++e.currentArgIndex < argc)
currentArg = e.command.argNames[e.currentArgIndex];
else
break;
}
if (e.currentArgIndex < argc && currentArg != ":")
{
/* parse loop completed because it ran out of data. We haven't
* parsed all of the declared arguments, and we're not stopped
* at an optional marker, so we must be missing something
* required... */
e.parseError = getMsg(MSN_ERR_REQUIRED_PARAM,
e.command.argNames[e.currentArgIndex]);
return false;
}
}
if (e.unparsedData)
{
/* parse loop completed with unparsed data, which means we've
* successfully parsed all arguments declared. Whine about the
* extra data... */
display (getMsg(MSN_EXTRA_PARAMS, e.unparsedData), MT_WARN);
}
else
{
/* we've got no unparsed data, and we're not missing a required
* argument, go back and fill in |null| for any optional arguments
* not present on the comand line. */
initOptionals();
}
}
else
{
/* if no data was provided, check to see if the event is good enough
* on its own. */
var rv = this.isCommandSatisfied (e);
if (rv)
initOptionals();
return rv;
}
return true;
}
/**
* Returns true if |e| has the properties required to call the command
* |command|.
*
* If |command| is not provided, |e.command| is used instead.
*
* @param e Event object to test against the command.
* @param command Command to test.
*/
CommandManager.prototype.isCommandSatisfied =
function cmgr_isok (e, command)
{
if (typeof command == "undefined")
command = e.command;
if (!command.enabled)
return false;
for (var i = 0; i < command.argNames.length; ++i)
{
if (command.argNames[i] == ":")
return true;
if (!(command.argNames[i] in e))
{
e.parseError = getMsg(MSN_ERR_REQUIRED_PARAM, command.argNames[i]);
//dd("command '" + command.name + "' unsatisfied: " + e.parseError);
return false;
}
}
//dd ("command '" + command.name + "' satisfied.");
return true;
}
/**
* Internal use only.
* See parseArguments above and the |argTypes| object below.
*
* Parses the next argument by calling an appropriate parser function, or the
* generic "word" parser if none other is found.
*
* @param e event object.
* @param name property name to use for the parse result.
*/
CommandManager.prototype.parseArgument =
function cmgr_parsearg (e, name)
{
var parseResult;
if (name in this.argTypes)
parseResult = this.argTypes[name](e, name, this);
else
parseResult = this.argTypes["word"](e, name, this);
if (!parseResult)
e.parseError = getMsg(MSN_ERR_INVALID_PARAM,
[name, e.unparsedData]);
return parseResult;
}
CommandManager.prototype.argTypes = new Object();
/**
* Convenience function used to map a list of new types to an existing parse
* function.
*/
CommandManager.prototype.argTypes.__aliasTypes__ =
function at_alias (list, type)
{
for (var i in list)
{
this[list[i]] = this[type];
}
}
/**
* Internal use only.
*
* Parses an integer, stores result in |e[name]|.
*/
CommandManager.prototype.argTypes["int"] =
function parse_int (e, name)
{
var ary = e.unparsedData.match (/(\d+)(?:\s+(.*))?$/);
if (!ary)
return false;
e[name] = Number(ary[1]);
e.unparsedData = arrayHasElementAt(ary, 2) ? ary[2] : "";
return true;
}
/**
* Internal use only.
*
* Parses a word, which is defined as a list of nonspace characters.
*
* Stores result in |e[name]|.
*/
CommandManager.prototype.argTypes["word"] =
function parse_word (e, name)
{
var ary = e.unparsedData.match (/(\S+)(?:\s+(.*))?$/);
if (!ary)
return false;
e[name] = ary[1];
e.unparsedData = arrayHasElementAt(ary, 2) ? ary[2] : "";
return true;
}
/**
* Internal use only.
*
* Parses a "state" which can be "true", "on", "yes", or 1 to indicate |true|,
* or "false", "off", "no", or 0 to indicate |false|.
*
* Stores result in |e[name]|.
*/
CommandManager.prototype.argTypes["state"] =
function parse_state (e, name)
{
var ary =
e.unparsedData.match (/(true|on|yes|1|false|off|no|0)(?:\s+(.*))?$/i);
if (!ary)
return false;
if (ary[1].search(/true|on|yes|1/i) != -1)
e[name] = true;
else
e[name] = false;
e.unparsedData = arrayHasElementAt(ary, 2) ? ary[2] : "";
return true;
}
/**
* Internal use only.
*
* Parses a "toggle" which can be "true", "on", "yes", or 1 to indicate |true|,
* or "false", "off", "no", or 0 to indicate |false|. In addition, the string
* "toggle" is accepted, in which case |e[name]| will be the string "toggle".
*
* Stores result in |e[name]|.
*/
CommandManager.prototype.argTypes["toggle"] =
function parse_toggle (e, name)
{
var ary = e.unparsedData.match
(/(toggle|true|on|yes|1|false|off|no|0)(?:\s+(.*))?$/i);
if (!ary)
return false;
if (ary[1].search(/toggle/i) != -1)
e[name] = "toggle";
else if (ary[1].search(/true|on|yes|1/i) != -1)
e[name] = true;
else
e[name] = false;
e.unparsedData = arrayHasElementAt(ary, 2) ? ary[2] : "";
return true;
}
/**
* Internal use only.
*
* Returns all unparsed data to the end of the line.
*
* Stores result in |e[name]|.
*/
CommandManager.prototype.argTypes["rest"] =
function parse_rest (e, name)
{
e[name] = e.unparsedData;
e.unparsedData = "";
return true;
}
/**
* Internal use only.
*
* Parses the rest of the unparsed data the same way the previous argument was
* parsed. Can't be used as the first parameter. if |name| is "..." then the
* name of the previous argument, plus the suffix "List" will be used instead.
*
* Stores result in |e[name]| or |e[lastName + "List"]|.
*/
CommandManager.prototype.argTypes["..."] =
function parse_repeat (e, name, cm)
{
ASSERT (e.currentArgIndex > 0, "<...> can't be the first argument.");
var lastArg = e.command.argNames[e.currentArgIndex - 1];
if (lastArg == ":")
lastArg = e.command.argNames[e.currentArgIndex - 2];
var listName = lastArg + "List";
e[listName] = [e[lastArg]];
while (e.unparsedData)
{
if (!cm.parseArgument(e, lastArg))
return false;
e[listName].push(e[lastArg]);
}
e[lastArg] = e[listName][0];
return true;
}