glowingbear-mainbox/js/irc-utils.js

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/**
* Portable utilities for IRC.
*/
var IrcUtils = {
/**
* Get a new version of a nick list, sorted alphabetically by lowercase nick.
*
* @param nickList Original nick list
* @return Nick list sorted alphabetically by lowercase nick
*/
_ciSearchNickList: function(nickList) {
var newList = [];
nickList.forEach(function(nick) {
newList.push(nick);
});
newList.sort(function(a, b) {
return a.toLowerCase() < b.toLowerCase() ? -1 : 1;
});
return newList;
},
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/**
* Completes a single nick.
*
* @param candidate What to search for
* @param nickList Array of current nicks sorted for case insensitive searching
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* @return Completed nick (null if not found)
*/
_completeSingleNick: function(candidate, nickList) {
var foundNick = null;
nickList.some(function(nick) {
if (nick.toLowerCase().search(candidate.toLowerCase()) == 0) {
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// found!
foundNick = nick;
return true;
}
return false;
});
return foundNick;
},
/**
* Get the next nick when iterating nicks.
*
* @param iterCandidate First characters to look at
* @param currentNick Current selected nick
* @param nickList Array of current nicks sorted for case insensitive searching
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* @return Next nick (may be the same)
*/
_nextNick: function(iterCandidate, currentNick, nickList) {
var firstInGroup = null;
var matchingNicks = [];
var at = null;
var lcIterCandidate = iterCandidate.toLowerCase();
var lcCurrentNick = currentNick.toLowerCase();
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// collect matching nicks
for (var i = 0; i < nickList.length; ++i) {
var lcNick = nickList[i].toLowerCase();
if (lcNick.search(lcIterCandidate) == 0) {
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matchingNicks.push(nickList[i]);
if (lcCurrentNick == lcNick) {
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at = matchingNicks.length - 1;
}
} else if (matchingNicks.length > 0) {
// end of group, no need to check after this
break;
}
}
if (at == null || matchingNicks.length == 0) {
return currentNick;
} else {
++at;
if (at == matchingNicks.length) {
// cycle
at = 0;
}
return matchingNicks[at];
}
},
/**
* Nicks tab completion.
*
* @param text Plain text (no colors)
* @param caretPos Current caret position (0 means before the first character)
* @param iterCandidate Current iteration candidate (null if not iterating)
* @param nickList Array of current nicks
* @param suf Custom suffix (at least one character, escaped for regex)
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* @return Object with following properties:
* text: new complete replacement text
* caretPos: new caret position within new text
* foundNick: completed nick (or null if not possible)
* iterCandidate: current iterating candidate
*/
completeNick: function(text, caretPos, iterCandidate, nickList, suf) {
var doIterate = (iterCandidate !== null);
if (suf === null) {
suf = ':';
}
// new nick list to search in
var searchNickList = IrcUtils._ciSearchNickList(nickList);
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// text before and after caret
var beforeCaret = text.substring(0, caretPos);
var afterCaret = text.substring(caretPos);
// default: don't change anything
var ret = {
text: text,
caretPos: caretPos,
foundNick: null,
iterCandidate: null
};
// iterating nicks at the beginning?
var m = beforeCaret.match(new RegExp('^([a-zA-Z0-9_\\\\\\[\\]{}^`|-]+)' + suf + ' $'));
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if (m) {
if (doIterate) {
// try iterating
var newNick = IrcUtils._nextNick(iterCandidate, m[1], searchNickList);
beforeCaret = newNick + suf + ' ';
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return {
text: beforeCaret + afterCaret,
caretPos: beforeCaret.length,
foundNick: newNick,
iterCandidate: iterCandidate
};
} else {
// if not iterating, don't do anything
return ret;
}
}
// nick completion in the beginning?
m = beforeCaret.match(/^([a-zA-Z0-9_\\\[\]{}^`|-]+)$/);
if (m) {
// try completing
var newNick = IrcUtils._completeSingleNick(m[1], searchNickList);
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if (newNick === null) {
// no match
return ret;
}
beforeCaret = newNick + suf + ' ';
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if (afterCaret[0] == ' ') {
// swallow first space after caret if any
afterCaret = afterCaret.substring(1);
}
return {
text: beforeCaret + afterCaret,
caretPos: beforeCaret.length,
foundNick: newNick,
iterCandidate: m[1]
};
}
// iterating nicks in the middle?
m = beforeCaret.match(/^(.* )([a-zA-Z0-9_\\\[\]{}^`|-]+) $/);
if (m) {
if (doIterate) {
// try iterating
var newNick = IrcUtils._nextNick(iterCandidate, m[2], searchNickList);
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beforeCaret = m[1] + newNick + ' ';
return {
text: beforeCaret + afterCaret,
caretPos: beforeCaret.length,
foundNick: newNick,
iterCandidate: iterCandidate
};
} else {
// if not iterating, don't do anything
return ret;
}
}
// nick completion elsewhere in the middle?
m = beforeCaret.match(/^(.* )([a-zA-Z0-9_\\\[\]{}^`|-]+)$/);
if (m) {
// try completing
var newNick = IrcUtils._completeSingleNick(m[2], searchNickList);
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if (newNick === null) {
// no match
return ret;
}
beforeCaret = m[1] + newNick + ' ';
if (afterCaret[0] == ' ') {
// swallow first space after caret if any
afterCaret = afterCaret.substring(1);
}
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return {
text: beforeCaret + afterCaret,
caretPos: beforeCaret.length,
foundNick: newNick,
iterCandidate: m[2]
};
}
// completion not possible
return ret;
}
};