201 lines
		
	
	
		
			7.0 KiB
		
	
	
	
		
			JavaScript
		
	
	
	
	
	
			
		
		
	
	
			201 lines
		
	
	
		
			7.0 KiB
		
	
	
	
		
			JavaScript
		
	
	
	
	
	
ace.define("ace/ext/whitespace",["require","exports","module","ace/lib/lang"], function(require, exports, module){/**
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 * ## Whitespace management and indentation utilities extension
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 *
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 * Provides whitespace handling capabilities including automatic indentation detection, trailing whitespace trimming,
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 * and indentation format conversion. Analyzes code patterns to determine optimal tab settings and offers commands for
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 * maintaining consistent code formatting across different indentation styles (spaces vs. tabs) and sizes.
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 *
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 * @module
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 */
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"use strict";
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var lang = require("../lib/lang");
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exports.$detectIndentation = function (lines, fallback) {
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    var stats = [];
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    var changes = [];
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    var tabIndents = 0;
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    var prevSpaces = 0;
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    var max = Math.min(lines.length, 1000);
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    for (var i = 0; i < max; i++) {
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        var line = lines[i];
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        if (!/^\s*[^*+\-\s]/.test(line))
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            continue;
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        if (line[0] == "\t") {
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            tabIndents++;
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            prevSpaces = -Number.MAX_VALUE;
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        }
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        else {
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            var spaces = line.match(/^ */)[0].length;
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            if (spaces && line[spaces] != "\t") {
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                var diff = spaces - prevSpaces;
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                if (diff > 0 && !(prevSpaces % diff) && !(spaces % diff))
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                    changes[diff] = (changes[diff] || 0) + 1;
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                stats[spaces] = (stats[spaces] || 0) + 1;
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            }
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            prevSpaces = spaces;
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        }
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        while (i < max && line[line.length - 1] == "\\")
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            line = lines[i++];
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    }
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    function getScore(indent) {
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        var score = 0;
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        for (var i = indent; i < stats.length; i += indent)
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            score += stats[i] || 0;
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        return score;
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    }
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    var changesTotal = changes.reduce(function (a, b) { return a + b; }, 0);
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    var first = { score: 0, length: 0 };
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    var spaceIndents = 0;
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    for (var i = 1; i < 12; i++) {
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        var score = getScore(i);
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        if (i == 1) {
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            spaceIndents = score;
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            score = stats[1] ? 0.9 : 0.8;
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            if (!stats.length)
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                score = 0;
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        }
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        else
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            score /= spaceIndents;
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        if (changes[i])
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            score += changes[i] / changesTotal;
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        if (score > first.score)
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            first = { score: score, length: i };
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    }
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    if (first.score && first.score > 1.4)
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        var tabLength = first.length;
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    if (tabIndents > spaceIndents + 1) {
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        if (tabLength == 1 || spaceIndents < tabIndents / 4 || first.score < 1.8)
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            tabLength = undefined;
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        return { ch: "\t", length: tabLength };
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    }
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    if (spaceIndents > tabIndents + 1)
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        return { ch: " ", length: tabLength };
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};
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exports.detectIndentation = function (session) {
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    var lines = session.getLines(0, 1000);
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    var indent = exports.$detectIndentation(lines) || {};
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    if (indent.ch)
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        session.setUseSoftTabs(indent.ch == " ");
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    if (indent.length)
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        session.setTabSize(indent.length);
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    return indent;
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};
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exports.trimTrailingSpace = function (session, options) {
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    var doc = session.getDocument();
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    var lines = doc.getAllLines();
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    var min = options && options.trimEmpty ? -1 : 0;
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    var cursors = [], ci = -1;
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    if (options && options.keepCursorPosition) {
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        if (session.selection.rangeCount) {
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            session.selection.rangeList.ranges.forEach(function (x, i, ranges) {
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                var next = ranges[i + 1];
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                if (next && next.cursor.row == x.cursor.row)
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                    return;
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                cursors.push(x.cursor);
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            });
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        }
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        else {
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            cursors.push(session.selection.getCursor());
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        }
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        ci = 0;
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    }
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    var cursorRow = cursors[ci] && cursors[ci].row;
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    for (var i = 0, l = lines.length; i < l; i++) {
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        var line = lines[i];
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        var index = line.search(/\s+$/);
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        if (i == cursorRow) {
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            if (index < cursors[ci].column && index > min)
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                index = cursors[ci].column;
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            ci++;
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            cursorRow = cursors[ci] ? cursors[ci].row : -1;
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        }
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        if (index > min)
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            doc.removeInLine(i, index, line.length);
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    }
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};
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exports.convertIndentation = function (session, ch, len) {
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    var oldCh = session.getTabString()[0];
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    var oldLen = session.getTabSize();
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    if (!len)
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        len = oldLen;
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    if (!ch)
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        ch = oldCh;
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    var tab = ch == "\t" ? ch : lang.stringRepeat(ch, len);
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    var doc = session.doc;
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    var lines = doc.getAllLines();
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    var cache = {};
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    var spaceCache = {};
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    for (var i = 0, l = lines.length; i < l; i++) {
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        var line = lines[i];
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        var match = line.match(/^\s*/)[0];
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        if (match) {
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            var w = session.$getStringScreenWidth(match)[0];
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            var tabCount = Math.floor(w / oldLen);
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            var reminder = w % oldLen;
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            var toInsert = cache[tabCount] || (cache[tabCount] = lang.stringRepeat(tab, tabCount));
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            toInsert += spaceCache[reminder] || (spaceCache[reminder] = lang.stringRepeat(" ", reminder));
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            if (toInsert != match) {
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                doc.removeInLine(i, 0, match.length);
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                doc.insertInLine({ row: i, column: 0 }, toInsert);
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            }
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        }
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    }
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    session.setTabSize(len);
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    session.setUseSoftTabs(ch == " ");
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};
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exports.$parseStringArg = function (text) {
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    var indent = {};
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    if (/t/.test(text))
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        indent.ch = "\t";
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    else if (/s/.test(text))
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        indent.ch = " ";
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    var m = text.match(/\d+/);
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    if (m)
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        indent.length = parseInt(m[0], 10);
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    return indent;
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};
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exports.$parseArg = function (arg) {
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    if (!arg)
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        return {};
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    if (typeof arg == "string")
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        return exports.$parseStringArg(arg);
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    if (typeof arg.text == "string")
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        return exports.$parseStringArg(arg.text);
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    return arg;
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};
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exports.commands = [{
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        name: "detectIndentation",
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        description: "Detect indentation from content",
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        exec: function (editor) {
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            exports.detectIndentation(editor.session);
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        }
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    }, {
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        name: "trimTrailingSpace",
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        description: "Trim trailing whitespace",
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        exec: function (editor, args) {
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            exports.trimTrailingSpace(editor.session, args);
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        }
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    }, {
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        name: "convertIndentation",
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        description: "Convert indentation to ...",
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        exec: function (editor, arg) {
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            var indent = exports.$parseArg(arg);
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            exports.convertIndentation(editor.session, indent.ch, indent.length);
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        }
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    }, {
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        name: "setIndentation",
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        description: "Set indentation",
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        exec: function (editor, arg) {
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            var indent = exports.$parseArg(arg);
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            indent.length && editor.session.setTabSize(indent.length);
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            indent.ch && editor.session.setUseSoftTabs(indent.ch == " ");
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        }
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    }];
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});                (function() {
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                    ace.require(["ace/ext/whitespace"], function(m) {
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                        if (typeof module == "object" && typeof exports == "object" && module) {
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                            module.exports = m;
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                        }
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                    });
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                })();
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