mediawiki-extensions-CodeEditor/modules/ace/ext-whitespace.js

ace.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++;
            prevSpaces = -Number.MAX_VALUE;
        }
        else {
            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) {
        if (tabLength == 1 || spaceIndents < tabIndents / 4 || first.score < 1.8)
            tabLength = undefined;
        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, options) {
    var doc = session.getDocument();
    var lines = doc.getAllLines();
    var min = options && options.trimEmpty ? -1 : 0;
    var cursors = [], ci = -1;
    if (options && options.keepCursorPosition) {
        if (session.selection.rangeCount) {
            session.selection.rangeList.ranges.forEach(function (x, i, ranges) {
                var next = ranges[i + 1];
                if (next && next.cursor.row == x.cursor.row)
                    return;
                cursors.push(x.cursor);
            });
        }
        else {
            cursors.push(session.selection.getCursor());
        }
        ci = 0;
    }
    var cursorRow = cursors[ci] && cursors[ci].row;
    for (var i = 0, l = lines.length; i < l; i++) {
        var line = lines[i];
        var index = line.search(/\s+$/);
        if (i == cursorRow) {
            if (index < cursors[ci].column && index > min)
                index = cursors[ci].column;
            ci++;
            cursorRow = cursors[ci] ? cursors[ci].row : -1;
        }
        if (index > min)
            doc.removeInLine(i, index, line.length);
    }
};
exports.convertIndentation = function (session, ch, len) {
    var oldCh = session.getTabString()[0];
    var oldLen = session.getTabSize();
    if (!len)
        len = oldLen;
    if (!ch)
        ch = oldCh;
    var tab = ch == "\t" ? ch : lang.stringRepeat(ch, len);
    var doc = session.doc;
    var lines = doc.getAllLines();
    var cache = {};
    var spaceCache = {};
    for (var i = 0, l = lines.length; i < l; i++) {
        var line = lines[i];
        var match = line.match(/^\s*/)[0];
        if (match) {
            var w = session.$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",
        description: "Detect indentation from content",
        exec: function (editor) {
            exports.detectIndentation(editor.session);
        }
    }, {
        name: "trimTrailingSpace",
        description: "Trim trailing whitespace",
        exec: function (editor, args) {
            exports.trimTrailingSpace(editor.session, args);
        }
    }, {
        name: "convertIndentation",
        description: "Convert indentation to ...",
        exec: function (editor, arg) {
            var indent = exports.$parseArg(arg);
            exports.convertIndentation(editor.session, indent.ch, indent.length);
        }
    }, {
        name: "setIndentation",
        description: "Set indentation",
        exec: function (editor, arg) {
            var indent = exports.$parseArg(arg);
            indent.length && editor.session.setTabSize(indent.length);
            indent.ch && editor.session.setUseSoftTabs(indent.ch == " ");
        }
    }];

});                (function() {
                    ace.require(["ace/ext/whitespace"], function(m) {
                        if (typeof module == "object" && typeof exports == "object" && module) {
                            module.exports = m;
                        }
                    });
                })();