atom/vendor/ace/keyboard/keybinding.js

/* ***** BEGIN LICENSE BLOCK *****
 * Version: MPL 1.1/GPL 2.0/LGPL 2.1
 *
 * The contents of this file are subject to the Mozilla Public License Version
 * 1.1 (the "License"); you may not use this file except in compliance with
 * the License. You may obtain a copy of the License at
 * http://www.mozilla.org/MPL/
 *
 * Software distributed under the License is distributed on an "AS IS" basis,
 * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
 * for the specific language governing rights and limitations under the
 * License.
 *
 * The Original Code is Ajax.org Code Editor (ACE).
 *
 * The Initial Developer of the Original Code is
 * Ajax.org B.V.
 * Portions created by the Initial Developer are Copyright (C) 2010
 * the Initial Developer. All Rights Reserved.
 *
 * Contributor(s):
 *      Fabian Jakobs <fabian AT ajax DOT org>
 *      Julian Viereck <julian.viereck@gmail.com>
 *
 * Alternatively, the contents of this file may be used under the terms of
 * either the GNU General Public License Version 2 or later (the "GPL"), or
 * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
 * in which case the provisions of the GPL or the LGPL are applicable instead
 * of those above. If you wish to allow use of your version of this file only
 * under the terms of either the GPL or the LGPL, and not to allow others to
 * use your version of this file under the terms of the MPL, indicate your
 * decision by deleting the provisions above and replace them with the notice
 * and other provisions required by the GPL or the LGPL. If you do not delete
 * the provisions above, a recipient may use your version of this file under
 * the terms of any one of the MPL, the GPL or the LGPL.
 *
 * ***** END LICENSE BLOCK ***** */

define(function(require, exports, module) {

var useragent = require("pilot/useragent");
var keyUtil  = require("pilot/keys");
var event = require("pilot/event");
var settings  = require("pilot/settings").settings;
var canon = require("pilot/canon");
require("ace/commands/default_commands");

var KeyBinding = function(editor) {
    this.$editor = editor;
    this.$data = { };
    this.$keyboardHandler = null;
};

(function() {
    this.setKeyboardHandler = function(keyboardHandler) {
        if (this.$keyboardHandler != keyboardHandler) {
            this.$data = { };
            this.$keyboardHandler = keyboardHandler;
        }
    };

    this.getKeyboardHandler = function() {
        return this.$keyboardHandler;
    };

    this.$callKeyboardHandler = function (e, hashId, keyOrText, keyCode) {
        var env = {editor: this.$editor},
            toExecute;

        if (this.$keyboardHandler) {
            toExecute =
                this.$keyboardHandler.handleKeyboard(this.$data, hashId, keyOrText, keyCode, e);
        }

        // If there is nothing to execute yet, then use the default keymapping.
        if (!toExecute || !toExecute.command) {
            if (hashId != 0 || keyCode != 0) {
                toExecute = {
                    command: canon.findKeyCommand(env, "editor", hashId, keyOrText)
                }
            } else {
                toExecute = {
                    command: "inserttext",
                    args: {
                        text: keyOrText
                    }
                }
            }
        }

        var success = false;
        if (toExecute) {
            success = canon.exec(toExecute.command,
                                        env, "editor", toExecute.args);
            if (success) {
                event.stopEvent(e);
            }
        }
        return success;
    };

    this.onCommandKey = function(e, hashId, keyCode, keyString) {
        // In case there is no keyString, try to interprete the keyCode.
        if (!keyString) {
            keyString = keyUtil.keyCodeToString(keyCode);
        }
        return this.$callKeyboardHandler(e, hashId, keyString, keyCode);
    };

    this.onTextInput = function(text) {
        return this.$callKeyboardHandler({}, 0, text, 0);
    }

}).call(KeyBinding.prototype);

exports.KeyBinding = KeyBinding;
});