/* ***** BEGIN LICENSE BLOCK *****
 * Distributed under the BSD license:
 *
 * Copyright (c) 2010, Ajax.org B.V.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *     * Redistributions of source code must retain the above copyright
 *       notice, this list of conditions and the following disclaimer.
 *     * Redistributions in binary form must reproduce the above copyright
 *       notice, this list of conditions and the following disclaimer in the
 *       documentation and/or other materials provided with the distribution.
 *     * Neither the name of Ajax.org B.V. nor the
 *       names of its contributors may be used to endorse or promote products
 *       derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 * DISCLAIMED. IN NO EVENT SHALL AJAX.ORG B.V. BE LIABLE FOR ANY
 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 *
 * ***** END LICENSE BLOCK ***** */

define(function(require, exports, module) {

var Editor = require("ace/editor").Editor;

require("../config").defineOptions(Editor.prototype, "editor", {
    enableLinking: {
        set: function(val) {
            if (val) {
                this.on("click", onClick);
                this.on("mousemove", onMouseMove);
            } else {
                this.off("click", onClick);
                this.off("mousemove", onMouseMove);
            }
        },
        value: false
    }
});

exports.previousLinkingHover = false;

function onMouseMove(e) {
    var editor = e.editor;
    var ctrl = e.getAccelKey();

    if (ctrl) {
        var editor = e.editor;
        var docPos = e.getDocumentPosition();
        var session = editor.session;
        var token = session.getTokenAt(docPos.row, docPos.column);

        if (exports.previousLinkingHover && exports.previousLinkingHover != token) {
            editor._emit("linkHoverOut");
        }
        editor._emit("linkHover", {position: docPos, token: token});
        exports.previousLinkingHover = token;
    } else if (exports.previousLinkingHover) {
        editor._emit("linkHoverOut");
        exports.previousLinkingHover = false;
    }
}

function onClick(e) {
    var ctrl = e.getAccelKey();
    var button = e.getButton();

    if (button == 0 && ctrl) {
        var editor = e.editor;
        var docPos = e.getDocumentPosition();
        var session = editor.session;
        var token = session.getTokenAt(docPos.row, docPos.column);

        editor._emit("linkClick", {position: docPos, token: token});
    }
}

});