alpaca/dist/lib/ace-builds/src/ext-whitespace.js

Alpaca provides the easiest and fastest way to generate interactive forms for the web and mobile devices. It runs simply as HTML5 or more elaborately using Bootstrap, jQuery Mobile or jQuery UI. Alpaca uses Handlebars to process JSON schema and provide

define("ace/ext/whitespace",["require","exports","module","ace/lib/lang"], function(require, exports, module) {
"use strict";

var lang = require("../lib/lang");
exports.$detectIndentation = function(lines, fallback) {
    var stats = [];
    var changes = [];
    var tabIndents = 0;
    var prevSpaces = 0;
    var max = Math.min(lines.length, 1000);
    for (var i = 0; i < max; i++) {
        var line = lines[i];
        if (!/^\s*[^*+\-\s]/.test(line))
            continue;

        if (line[0] == "\t")
            tabIndents++;

        var spaces = line.match(/^ */)[0].length;
        if (spaces && line[spaces] != "\t") {
            var diff = spaces - prevSpaces;
            if (diff > 0 && !(prevSpaces%diff) && !(spaces%diff))
                changes[diff] = (changes[diff] || 0) + 1;

            stats[spaces] = (stats[spaces] || 0) + 1;
        }
        prevSpaces = spaces;
        while (i < max && line[line.length - 1] == "\\")
            line = lines[i++];
    }
    
    function getScore(indent) {
        var score = 0;
        for (var i = indent; i < stats.length; i += indent)
            score += stats[i] || 0;
        return score;
    }

    var changesTotal = changes.reduce(function(a,b){return a+b}, 0);

    var first = {score: 0, length: 0};
    var spaceIndents = 0;
    for (var i = 1; i < 12; i++) {
        var score = getScore(i);
        if (i == 1) {
            spaceIndents = score;
            score = stats[1] ? 0.9 : 0.8;
            if (!stats.length)
                score = 0
        } else
            score /= spaceIndents;

        if (changes[i])
            score += changes[i] / changesTotal;

        if (score > first.score)
            first = {score: score, length: i};
    }

    if (first.score && first.score > 1.4)
        var tabLength = first.length;

    if (tabIndents > spaceIndents + 1)
        return {ch: "\t", length: tabLength};

    if (spaceIndents > tabIndents + 1)
        return {ch: " ", length: tabLength};
};

exports.detectIndentation = function(session) {
    var lines = session.getLines(0, 1000);
    var indent = exports.$detectIndentation(lines) || {};

    if (indent.ch)
        session.setUseSoftTabs(indent.ch == " ");

    if (indent.length)
        session.setTabSize(indent.length);
    return indent;
};

exports.trimTrailingSpace = function(session, trimEmpty) {
    var doc = session.getDocument();
    var lines = doc.getAllLines();
    
    var min = trimEmpty ? -1 : 0;

    for (var i = 0, l=lines.length; i < l; i++) {
        var line = lines[i];
        var index = line.search(/\s+$/);

        if (index > min)
            doc.removeInLine(i, index, line.length);
    }
};

exports.convertIndentation = function(session, ch, len) {
    var oldCh = session.getTabString()[0];
    var oldLen = session.getTabSize();
    if (!len) len = oldLen;
    if (!ch) ch = oldCh;

    var tab = ch == "\t" ? ch: lang.stringRepeat(ch, len);

    var doc = session.doc;
    var lines = doc.getAllLines();

    var cache = {};
    var spaceCache = {};
    for (var i = 0, l=lines.length; i < l; i++) {
        var line = lines[i];
        var match = line.match(/^\s*/)[0];
        if (match) {
            var w = session.$getStringScreenWidth(match)[0];
            var tabCount = Math.floor(w/oldLen);
            var reminder = w%oldLen;
            var toInsert = cache[tabCount] || (cache[tabCount] = lang.stringRepeat(tab, tabCount));
            toInsert += spaceCache[reminder] || (spaceCache[reminder] = lang.stringRepeat(" ", reminder));

            if (toInsert != match) {
                doc.removeInLine(i, 0, match.length);
                doc.insertInLine({row: i, column: 0}, toInsert);
            }
        }
    }
    session.setTabSize(len);
    session.setUseSoftTabs(ch == " ");
};

exports.$parseStringArg = function(text) {
    var indent = {};
    if (/t/.test(text))
        indent.ch = "\t";
    else if (/s/.test(text))
        indent.ch = " ";
    var m = text.match(/\d+/);
    if (m)
        indent.length = parseInt(m[0], 10);
    return indent;
};

exports.$parseArg = function(arg) {
    if (!arg)
        return {};
    if (typeof arg == "string")
        return exports.$parseStringArg(arg);
    if (typeof arg.text == "string")
        return exports.$parseStringArg(arg.text);
    return arg;
};

exports.commands = [{
    name: "detectIndentation",
    exec: function(editor) {
        exports.detectIndentation(editor.session);
    }
}, {
    name: "trimTrailingSpace",
    exec: function(editor) {
        exports.trimTrailingSpace(editor.session);
    }
}, {
    name: "convertIndentation",
    exec: function(editor, arg) {
        var indent = exports.$parseArg(arg);
        exports.convertIndentation(editor.session, indent.ch, indent.length);
    }
}, {
    name: "setIndentation",
    exec: function(editor, arg) {
        var indent = exports.$parseArg(arg);
        indent.length && editor.session.setTabSize(indent.length);
        indent.ch && editor.session.setUseSoftTabs(indent.ch == " ");
    }
}];

});
;
                (function() {
                    window.require(["ace/ext/whitespace"], function() {});
                })();