1 /*
2 * Copyright (c) 2022 Huawei Device Co., Ltd.
3 * Licensed under the Apache License, Version 2.0 (the "License");
4 * you may not use this file except in compliance with the License.
5 * You may obtain a copy of the License at
6 *
7 * http://www.apache.org/licenses/LICENSE-2.0
8 *
9 * Unless required by applicable law or agreed to in writing, software
10 * distributed under the License is distributed on an "AS IS" BASIS,
11 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12 * See the License for the specific language governing permissions and
13 * limitations under the License.
14 */
15
16 #include "color_parser.h"
17
18 #include <cstdlib>
19
20 namespace OHOS {
21 namespace Rosen {
Parse(const std::string & colorStr,uint32_t & colorValue)22 bool ColorParser::Parse(const std::string& colorStr, uint32_t& colorValue)
23 {
24 if (colorStr.empty()) {
25 return false;
26 }
27
28 if (colorStr[0] == '#') { // start with '#'
29 std::string color = colorStr.substr(1);
30 if (!IsValidHexString(color)) {
31 return false;
32 }
33 constexpr int HEX = 16;
34 colorValue = std::strtoul(color.c_str(), 0, HEX); // convert hex string to number
35 if (colorStr.size() == 7) { // 7 is color string length.#RRGGBB: RRGGBB -> AARRGGBB
36 colorValue |= 0xff000000;
37 return true;
38 }
39 if (colorStr.size() == 9) { // 9 is color string length.#AARRGGBB
40 return true;
41 }
42 }
43 return false;
44 }
45
IsValidHexString(const std::string & colorStr)46 bool ColorParser::IsValidHexString(const std::string& colorStr)
47 {
48 if (colorStr.empty()) {
49 return false;
50 }
51 for (char ch : colorStr) {
52 if ((ch >= '0' && ch <= '9') || (ch >= 'a' && ch <= 'f') || (ch >= 'A' && ch <= 'F')) {
53 continue;
54 }
55 return false;
56 }
57 return true;
58 }
59
60 // check color string, format:#008EF5 or #FF008EF5. Alpha must be 0xff or none.
IsValidColorNoAlpha(const std::string & colorStr)61 bool ColorParser::IsValidColorNoAlpha(const std::string& colorStr)
62 {
63 uint32_t colorValue = 0;
64 if (Parse(colorStr, colorValue)) {
65 return (colorValue & 0xff000000) == 0xff000000;
66 }
67 return false;
68 }
69 } // namespace Rosen
70 } // namespace OHOS
71