/*

 *  Copyright (C) 2000 Harri Porten (porten@kde.org)

 *  Copyright (C) 2006 Jon Shier (jshier@iastate.edu)

 *  Copyright (C) 2003, 2004, 2005, 2006, 2007 Apple Inc. All rights reseved.

 *  Copyright (C) 2006 Alexey Proskuryakov (ap@webkit.org)

 *

 *  This library is free software; you can redistribute it and/or

 *  modify it under the terms of the GNU Lesser General Public

 *  License as published by the Free Software Foundation; either

 *  version 2 of the License, or (at your option) any later version.

 *

 *  This library is distributed in the hope that it will be useful,

 *  but WITHOUT ANY WARRANTY; without even the implied warranty of

 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU

 *  Lesser General Public License for more details.

 *

 *  You should have received a copy of the GNU Lesser General Public

 *  License along with this library; if not, write to the Free Software

 *  Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301

 *  USA

 */

#include "config.h"

#include "WindowFeatures.h"

#include "PlatformString.h"

#include "StringHash.h"

#include <wtf/Assertions.h>

#include <wtf/HashMap.h>

#include <wtf/MathExtras.h>

namespace WebCore {

// Though isspace() considers \t and \v to be whitespace, Win IE doesn't.

static bool isSeparator(UChar c)

{

    return c == ' ' || c == '\t' || c == '\n' || c == '\r' || c == '=' || c == ',' || c == '\0';

}

WindowFeatures::WindowFeatures(const String& features)

    : xSet(false)

    , ySet(false)

    , widthSet(false)

    , heightSet(false)

    , fullscreen(false)

    , dialog(false)

{

    /*

     The IE rule is: all features except for channelmode and fullscreen default to YES, but

     if the user specifies a feature string, all features default to NO. (There is no public

     standard that applies to this method.)

     <http://msdn.microsoft.com/workshop/author/dhtml/reference/methods/open_0.asp>

     We always allow a window to be resized, which is consistent with Firefox.

     */

    if (features.length() == 0) {

        menuBarVisible = true;

        statusBarVisible = true;

        toolBarVisible = true;

        locationBarVisible = true;

        scrollbarsVisible = true;

        resizable = true;

        return;

    }

    menuBarVisible = false;

    statusBarVisible = false;

    toolBarVisible = false;

    locationBarVisible = false;

    scrollbarsVisible = false;

    resizable = true;

    // Tread lightly in this code -- it was specifically designed to mimic Win IE's parsing behavior.

    int keyBegin, keyEnd;

    int valueBegin, valueEnd;

    int i = 0;

    int length = features.length();

    String buffer = features.lower();

    while (i < length) {

        // skip to first non-separator, but don't skip past the end of the string

        while (isSeparator(buffer[i])) {

            if (i >= length)

                break;

            i++;

        }

        keyBegin = i;

        // skip to first separator

        while (!isSeparator(buffer[i]))

            i++;

        keyEnd = i;

        // skip to first '=', but don't skip past a ',' or the end of the string

        while (buffer[i] != '=') {

            if (buffer[i] == ',' || i >= length)

                break;

            i++;

        }

        // skip to first non-separator, but don't skip past a ',' or the end of the string

        while (isSeparator(buffer[i])) {

            if (buffer[i] == ',' || i >= length)

                break;

            i++;

        }

        valueBegin = i;

        // skip to first separator

        while (!isSeparator(buffer[i]))

            i++;

        valueEnd = i;

        ASSERT(i <= length);

        String keyString(buffer.substring(keyBegin, keyEnd - keyBegin));

        String valueString(buffer.substring(valueBegin, valueEnd - valueBegin));

        setWindowFeature(keyString, valueString);

    }

}

void WindowFeatures::setWindowFeature(const String& keyString, const String& valueString)

{

    int value;

    // Listing a key with no value is shorthand for key=yes

    if (valueString.length() == 0 || valueString == "yes")

        value = 1;

    else

        value = valueString.toInt();

    // We ignore a keyString of "resizable", which is consistent with Firefox.

    if (keyString == "left" || keyString == "screenx") {

        xSet = true;

        x = value;

    } else if (keyString == "top" || keyString == "screeny") {

        ySet = true;

        y = value;

    } else if (keyString == "width" || keyString == "innerwidth") {

        widthSet = true;

        width = value;

    } else if (keyString == "height" || keyString == "innerheight") {

        heightSet = true;

        height = value;

    } else if (keyString == "menubar")

        menuBarVisible = value;

    else if (keyString == "toolbar")

        toolBarVisible = value;

    else if (keyString == "location")

        locationBarVisible = value;

    else if (keyString == "status")

        statusBarVisible = value;

    else if (keyString == "fullscreen")

        fullscreen = value;

    else if (keyString == "scrollbars")

        scrollbarsVisible = value;

    else if (value == 1)

        additionalFeatures.append(keyString);

}

bool WindowFeatures::boolFeature(const HashMap<String, String>& features, const char* key, bool defaultValue)

{

    HashMap<String, String>::const_iterator it = features.find(key);

    if (it == features.end())

        return defaultValue;

    const String& value = it->second;

    return value.isNull() || value == "1" || value == "yes" || value == "on";

}

float WindowFeatures::floatFeature(const HashMap<String, String>& features, const char* key, float min, float max, float defaultValue)

{

    HashMap<String, String>::const_iterator it = features.find(key);

    if (it == features.end())

        return defaultValue;

    // FIXME: Can't distinguish "0q" from string with no digits in it -- both return d == 0 and ok == false.

    // Would be good to tell them apart somehow since string with no digits should be default value and

    // "0q" should be minimum value.

    bool ok;

    double d = it->second.toDouble(&ok);

    if ((d == 0 && !ok) || isnan(d))

        return defaultValue;

    if (d < min || max <= min)

        return min;

    if (d > max)

        return max;

    return static_cast<int>(d);

}

} // namespace WebCore