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                return ch;
            }
        };

        value = ts.processText(value, tabstopOptions);

        if (settings.variables['insert_final_tabstop'] && !/\$\{0\}$/.test(value)) {
            value += '${0}';
        } else if (lastZero) {
            var common = emmet.utils ? emmet.utils.common : emmet.require('utils');
            value = common.replaceSubstring(value, '${0}', lastZero[0], lastZero[1]);
        }
        
        return value;
    }
};


var keymap = {
    expand_abbreviation: {"mac": "ctrl+alt+e", "win": "alt+e"},
    match_pair_outward: {"mac": "ctrl+d", "win": "ctrl+,"},
    match_pair_inward: {"mac": "ctrl+j", "win": "ctrl+shift+0"},
    matching_pair: {"mac": "ctrl+alt+j", "win": "alt+j"},
    next_edit_point: "alt+right",
    prev_edit_point: "alt+left",
    toggle_comment: {"mac": "command+/", "win": "ctrl+/"},
    split_join_tag: {"mac": "shift+command+'", "win": "shift+ctrl+`"},
    remove_tag: {"mac": "command+'", "win": "shift+ctrl+;"},
    evaluate_math_expression: {"mac": "shift+command+y", "win": "shift+ctrl+y"},
    increment_number_by_1: "ctrl+up",
    decrement_number_by_1: "ctrl+down",
    increment_number_by_01: "alt+up",
    decrement_number_by_01: "alt+down",
    increment_number_by_10: {"mac": "alt+command+up", "win": "shift+alt+up"},
    decrement_number_by_10: {"mac": "alt+command+down", "win": "shift+alt+down"},
    select_next_item: {"mac": "shift+command+.", "win": "shift+ctrl+."},
    select_previous_item: {"mac": "shift+command+,", "win": "shift+ctrl+,"},
    reflect_css_value: {"mac": "shift+command+r", "win": "shift+ctrl+r"},

    encode_decode_data_url: {"mac": "shift+ctrl+d", "win": "ctrl+'"},
    expand_abbreviation_with_tab: "Tab",
    wrap_with_abbreviation: {"mac": "shift+ctrl+a", "win": "shift+ctrl+a"}
};

var editorProxy = new AceEmmetEditor();
exports.commands = new HashHandler();
exports.runEmmetCommand = function runEmmetCommand(editor) {
    if (this.action == "expand_abbreviation_with_tab") {
        if (!editor.selection.isEmpty())
            return false;
        var pos = editor.selection.lead;
        var token = editor.session.getTokenAt(pos.row, pos.column);
        if (token && /\btag\b/.test(token.type))
            return false;
    }
    try {
        editorProxy.setupContext(editor);
        var actions = emmet.actions || emmet.require("actions");
        
        if (this.action == "wrap_with_abbreviation") {
            return setTimeout(function() {
                actions.run("wrap_with_abbreviation", editorProxy);
            }, 0);
        }
        
        var result = actions.run(this.action, editorProxy);
    } catch(e) {
        if (!emmet) {
            var loading = exports.load(runEmmetCommand.bind(this, editor));
            if (this.action == "expand_abbreviation_with_tab")
                return false;
            return loading;
        }
        editor._signal("changeStatus", typeof e == "string" ? e : e.message);
        config.warn(e);
        result = false;
    }
    return result;
};

for (var command in keymap) {
    exports.commands.addCommand({
        name: "emmet:" + command,
        action: command,
        bindKey: keymap[command],
        exec: exports.runEmmetCommand,
        multiSelectAction: "forEach"
    });
}

exports.updateCommands = function(editor, enabled) {
    if (enabled) {
        editor.keyBinding.addKeyboardHandler(exports.commands);
    } else {
        editor.keyBinding.removeKeyboardHandler(exports.commands);
    }
};

exports.isSupportedMode = function(mode) {
    if (!mode) return false;
    if (mode.emmetConfig) return true;
    var id = mode.$id || mode;
    return /css|less|scss|sass|stylus|html|php|twig|ejs|handlebars/.test(id);
};

exports.isAvailable = function(editor, command) {
    if (/(evaluate_math_expression|expand_abbreviation)$/.test(command))
        return true;
    var mode = editor.session.$mode;
    var isSupported = exports.isSupportedMode(mode);
    if (isSupported && mode.$modes) {
        try {
            editorProxy.setupContext(editor);
            if (/js|php/.test(editorProxy.getSyntax()))
                isSupported = false;
        } catch(e) {}
    }
    return isSupported;
};

var onChangeMode = function(e, target) {