/*
 * Copyright (c) 2022-2022 Huawei Device Co., Ltd.
 * Licensed under the Apache License, Version 2.0 (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.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

#include "color_parser.h"
#include <cstdlib>

#include "window_manager_hilog.h"

namespace OHOS {
namespace Rosen {
namespace {
    constexpr HiviewDFX::HiLogLabel LABEL = {LOG_CORE, HILOG_DOMAIN_WINDOW, "ColorParser"};
}

bool ColorParser::Parse(const std::string& colorStr, uint32_t& colorValue)
{
    if (colorStr.empty()) {
        WLOGFE("color string is empty");
        return false;
    }

    if (colorStr[0] == '#') { // start with '#'
        std::string color = colorStr.substr(1);
        if (!IsValidHexString(color)) {
            return false;
        }
        char* ptr;
        colorValue = std::strtoul(color.c_str(), &ptr, 16); // convert hex string to number
        if (colorStr.size() == 7) { // #RRGGBB: RRGGBB -> AARRGGBB
            colorValue |= 0xff000000;
            return true;
        } else if (colorStr.size() == 9) { // #AARRGGBB
            return true;
        } else {
            // do nothing
        }
    }
    return false;
}

bool ColorParser::IsValidHexString(const std::string& colorStr)
{
    if (colorStr.empty()) {
        return false;
    }
    for (char ch : colorStr) {
        if ((ch >= '0' && ch <= '9') || (ch >= 'a' && ch <= 'f') || (ch >= 'A' && ch <= 'F')) {
            continue;
        }
        return false;
    }
    return true;
}
} // namespace Rosen
} // namespace OHOS