/* vim:ts=4:sts=4:sw=4:
 * ***** 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 DOT viereck AT gmail DOT 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) {
"use strict";

var dom = require("../lib/dom");
var oop = require("../lib/oop");
var EventEmitter = require("../lib/event_emitter").EventEmitter;

var Gutter = function(parentEl) {
    this.element = dom.createElement("div");
    this.element.className = "ace_layer ace_gutter-layer";
    parentEl.appendChild(this.element);
    this.setShowFoldWidgets(this.$showFoldWidgets);
    
    this.gutterWidth = 0;

    this.$breakpoints = [];
    this.$annotations = [];
    this.$decorations = [];
};

(function() {

    oop.implement(this, EventEmitter);
    
    this.setSession = function(session) {
        this.session = session;
    };

    this.addGutterDecoration = function(row, className){
        if (!this.$decorations[row])
            this.$decorations[row] = "";
        this.$decorations[row] += " " + className;
    };

    this.removeGutterDecoration = function(row, className){
        this.$decorations[row] = (this.$decorations[row] || "").replace(" " + className, "");
    };

    this.setAnnotations = function(annotations) {
        // iterate over sparse array
        this.$annotations = [];
        for (var row in annotations) if (annotations.hasOwnProperty(row)) {
            var rowAnnotations = annotations[row];
            if (!rowAnnotations)
                continue;

            var rowInfo = this.$annotations[row] = {
                text: []
            };
            for (var i=0; i<rowAnnotations.length; i++) {
                var annotation = rowAnnotations[i];
                var annoText = annotation.text.replace(/"/g, "&quot;").replace(/'/g, "&#8217;").replace(/</, "&lt;");
                if (rowInfo.text.indexOf(annoText) === -1)
                    rowInfo.text.push(annoText);
                var type = annotation.type;
                if (type == "error")
                    rowInfo.className = "ace_error";
                else if (type == "warning" && rowInfo.className != "ace_error")
                    rowInfo.className = "ace_warning";
                else if (type == "info" && (!rowInfo.className))
                    rowInfo.className = "ace_info";
            }
        }
    };

    this.update = function(config) {
        this.$config = config;

        var emptyAnno = {className: "", text: []};
        var html = [];
        var i = config.firstRow;
        var lastRow = config.lastRow;
        var fold = this.session.getNextFoldLine(i);
        var foldStart = fold ? fold.start.row : Infinity;
        var foldWidgets = this.$showFoldWidgets && this.session.foldWidgets;
        var breakpoints = this.session.$breakpoints;

        while (true) {
            if(i > foldStart) {
                i = fold.end.row + 1;
                fold = this.session.getNextFoldLine(i, fold);
                foldStart = fold ?fold.start.row :Infinity;
            }
            if(i > lastRow)
                break;

            var annotation = this.$annotations[i] || emptyAnno;
            html.push("<div class='ace_gutter-cell",
                this.$decorations[i] || "",
                breakpoints[i] ? " ace_breakpoint " : " ",
                annotation.className,
                "' title='", annotation.text.join("\n"),
                "' style='height:", this.session.getRowLength(i) * config.lineHeight, "px;'>", (i+1));

            if (foldWidgets) {
                var c = foldWidgets[i];
                // check if cached value is invalidated and we need to recompute
                if (c == null)
                    c = foldWidgets[i] = this.session.getFoldWidget(i);
                if (c)
                    html.push(
                        "<span class='ace_fold-widget ", c,
                        c == "start" && i == foldStart && i < fold.end.row ? " closed" : " open",
                        "'></span>"
                    );
            }

            html.push("</div>");

            i++;
        }

        if (this.session.$useWrapMode)
            html.push(
                "<div class='ace_gutter-cell' style='pointer-events:none;opacity:0'>",
                this.session.getLength() - 1,
                "</div>"
            );

        this.element = dom.setInnerHtml(this.element, html.join(""));
        this.element.style.height = config.minHeight + "px";
        
        var gutterWidth = this.element.offsetWidth;
        if (gutterWidth !== this.gutterWidth) {
            this.gutterWidth = gutterWidth;
            this._emit("changeGutterWidth", gutterWidth);
        }
    };

    this.$showFoldWidgets = true;
    this.setShowFoldWidgets = function(show) {
        if (show)
            dom.addCssClass(this.element, "ace_folding-enabled");
        else
            dom.removeCssClass(this.element, "ace_folding-enabled");

        this.$showFoldWidgets = show;
    };
    
    this.getShowFoldWidgets = function() {
        return this.$showFoldWidgets;
    };

}).call(Gutter.prototype);

exports.Gutter = Gutter;

});