/*
 * Copyright (C) 2011 Google Inc. 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 Google Inc. 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 THE COPYRIGHT
 * OWNER OR CONTRIBUTORS 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.
 */

WebInspector.ScriptFormatter = function()
{
    this._worker = new Worker("ScriptFormatterWorker.js");
    this._worker.onmessage = this._didFormatContent.bind(this);
    this._tasks = [];
}

WebInspector.ScriptFormatter.locationToPosition = function(lineEndings, location)
{
    var position = location.lineNumber ? lineEndings[location.lineNumber - 1] + 1 : 0;
    return position + location.columnNumber;
}

WebInspector.ScriptFormatter.lineToPosition = function(lineEndings, lineNumber)
{
    return this.locationToPosition(lineEndings, { lineNumber: lineNumber, columnNumber: 0 });
}

WebInspector.ScriptFormatter.positionToLocation = function(lineEndings, position)
{
    var location = {};
    location.lineNumber = lineEndings.upperBound(position - 1);
    if (!location.lineNumber)
        location.columnNumber = position;
    else
        location.columnNumber = position - lineEndings[location.lineNumber - 1] - 1;
    return location;
}

WebInspector.ScriptFormatter.prototype = {
    formatContent: function(mimeType, content, callback)
    {
        content = content.replace(/\r\n?|[\n\u2028\u2029]/g, "\n").replace(/^\uFEFF/, '');
        var data = { mimeType: mimeType, content: content };
        this._tasks.push({ data: data, callback: callback });
        this._worker.postMessage(data);
    },

    _didFormatContent: function(event)
    {
        var task = this._tasks.shift();
        event.data.mapping.originalLineEndings = task.data.content.lineEndings();
        task.callback(event.data.content, event.data.mapping);
    }
}
