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/*
* Copyright (C) 1999 Lars Knoll (knoll@kde.org)
* (C) 1999 Antti Koivisto (koivisto@kde.org)
* (C) 2001 Dirk Mueller ( mueller@kde.org )
* Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008 Apple Inc. All rights reserved.
* Copyright (C) 2006 Andrew Wellington (proton@wiretapped.net)
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library 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
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public License
* along with this library; see the file COPYING.LIB. If not, write to
* the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
* Boston, MA 02110-1301, USA.
*
*/
#include "config.h"
#include "Length.h"
#include "PlatformString.h"
#include <wtf/ASCIICType.h>
#include <wtf/Assertions.h>
#include <wtf/OwnArrayPtr.h>
#include <wtf/text/StringBuffer.h>
using namespace WTF;
namespace WebCore {
static Length parseLength(const UChar* data, unsigned length)
{
if (length == 0)
return Length(1, Relative);
unsigned i = 0;
while (i < length && isSpaceOrNewline(data[i]))
++i;
if (i < length && (data[i] == '+' || data[i] == '-'))
++i;
while (i < length && isASCIIDigit(data[i]))
++i;
unsigned intLength = i;
while (i < length && (isASCIIDigit(data[i]) || data[i] == '.'))
++i;
unsigned doubleLength = i;
// IE quirk: Skip whitespace between the number and the % character (20 % => 20%).
while (i < length && isSpaceOrNewline(data[i]))
++i;
bool ok;
UChar next = (i < length) ? data[i] : ' ';
if (next == '%') {
// IE quirk: accept decimal fractions for percentages.
double r = charactersToDouble(data, doubleLength, &ok);
if (ok)
return Length(r, Percent);
return Length(1, Relative);
}
int r = charactersToIntStrict(data, intLength, &ok);
if (next == '*') {
if (ok)
return Length(r, Relative);
return Length(1, Relative);
}
if (ok)
return Length(r, Fixed);
return Length(0, Relative);
}
static int countCharacter(const UChar* data, unsigned length, UChar character)
{
int count = 0;
for (int i = 0; i < static_cast<int>(length); ++i)
count += data[i] == character;
return count;
}
PassOwnArrayPtr<Length> newCoordsArray(const String& string, int& len)
{
unsigned length = string.length();
const UChar* data = string.characters();
StringBuffer spacified(length);
for (unsigned i = 0; i < length; i++) {
UChar cc = data[i];
if (cc > '9' || (cc < '0' && cc != '-' && cc != '*' && cc != '.'))
spacified[i] = ' ';
else
spacified[i] = cc;
}
RefPtr<StringImpl> str = StringImpl::adopt(spacified);
str = str->simplifyWhiteSpace();
len = countCharacter(str->characters(), str->length(), ' ') + 1;
OwnArrayPtr<Length> r = adoptArrayPtr(new Length[len]);
int i = 0;
unsigned pos = 0;
size_t pos2;
while ((pos2 = str->find(' ', pos)) != notFound) {
r[i++] = parseLength(str->characters() + pos, pos2 - pos);
pos = pos2+1;
}
r[i] = parseLength(str->characters() + pos, str->length() - pos);
ASSERT(i == len - 1);
return r.release();
}
PassOwnArrayPtr<Length> newLengthArray(const String& string, int& len)
{
RefPtr<StringImpl> str = string.impl()->simplifyWhiteSpace();
if (!str->length()) {
len = 1;
return nullptr;
}
len = countCharacter(str->characters(), str->length(), ',') + 1;
OwnArrayPtr<Length> r = adoptArrayPtr(new Length[len]);
int i = 0;
unsigned pos = 0;
size_t pos2;
while ((pos2 = str->find(',', pos)) != notFound) {
r[i++] = parseLength(str->characters() + pos, pos2 - pos);
pos = pos2+1;
}
ASSERT(i == len - 1);
// IE Quirk: If the last comma is the last char skip it and reduce len by one.
if (str->length()-pos > 0)
r[i] = parseLength(str->characters() + pos, str->length() - pos);
else
len--;
return r.release();
}
} // namespace WebCore
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