Torne (Richard Coles) | 53e740f | 2013-05-09 18:38:43 +0100 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2012 Motorola Mobility Inc. All rights reserved. |
| 3 | * |
| 4 | * Redistribution and use in source and binary forms, with or without |
| 5 | * modification, are permitted provided that the following conditions are |
| 6 | * met: |
| 7 | * |
| 8 | * 1. Redistributions of source code must retain the above copyright |
| 9 | * notice, this list of conditions and the following disclaimer. |
| 10 | * 2. Redistributions in binary form must reproduce the above |
| 11 | * copyright notice, this list of conditions and the following disclaimer in |
| 12 | * the documentation and/or other materials provided with the distribution. |
| 13 | * 3. Neither the name of Motorola Mobility Inc. nor the names of its |
| 14 | * contributors may be used to endorse or promote products derived from this |
| 15 | * software without specific prior written permission. |
| 16 | * |
| 17 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| 18 | * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| 19 | * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
| 20 | * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
| 21 | * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| 22 | * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
| 23 | * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| 24 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| 25 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| 26 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| 27 | * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| 28 | */ |
| 29 | |
| 30 | #include "config.h" |
| 31 | #include "core/css/DOMWindowCSS.h" |
| 32 | |
| 33 | #include "core/css/CSSParser.h" |
| 34 | #include "core/css/StylePropertySet.h" |
| 35 | #include "core/page/RuntimeCSSEnabled.h" |
Ben Murdoch | e69819b | 2013-07-17 14:56:49 +0100 | [diff] [blame^] | 36 | #include "wtf/text/WTFString.h" |
Torne (Richard Coles) | 53e740f | 2013-05-09 18:38:43 +0100 | [diff] [blame] | 37 | |
| 38 | namespace WebCore { |
| 39 | |
| 40 | PassRefPtr<DOMWindowCSS> DOMWindowCSS::create() |
| 41 | { |
| 42 | return adoptRef(new DOMWindowCSS()); |
| 43 | } |
| 44 | |
| 45 | static String valueWithoutImportant(const String& value) |
| 46 | { |
| 47 | if (!value.endsWith("important", false)) |
| 48 | return value; |
| 49 | |
| 50 | String newValue = value; |
| 51 | int bangIndex = newValue.length() - 9 - 1; |
| 52 | if (newValue[bangIndex] == ' ') |
| 53 | bangIndex--; |
| 54 | newValue = newValue.left(bangIndex); |
| 55 | |
| 56 | return newValue; |
| 57 | } |
| 58 | |
| 59 | bool DOMWindowCSS::supports(const String& property, const String& value) const |
| 60 | { |
| 61 | CSSPropertyID propertyID = cssPropertyID(property.stripWhiteSpace()); |
| 62 | if (propertyID == CSSPropertyInvalid) |
| 63 | return false; |
| 64 | |
| 65 | if (!RuntimeCSSEnabled::isCSSPropertyEnabled(propertyID)) |
| 66 | return false; |
| 67 | |
| 68 | // CSSParser::parseValue() won't work correctly if !important is present, |
| 69 | // so just get rid of it. It doesn't matter to supports() if it's actually |
| 70 | // there or not, provided how it's specified in the value is correct. |
| 71 | String normalizedValue = value.stripWhiteSpace().simplifyWhiteSpace(); |
| 72 | normalizedValue = valueWithoutImportant(normalizedValue); |
| 73 | |
| 74 | if (normalizedValue.isEmpty()) |
| 75 | return false; |
| 76 | |
Torne (Richard Coles) | 93ac45c | 2013-05-29 14:40:20 +0100 | [diff] [blame] | 77 | RefPtr<MutableStylePropertySet> dummyStyle = MutableStylePropertySet::create(); |
Torne (Richard Coles) | 53e740f | 2013-05-09 18:38:43 +0100 | [diff] [blame] | 78 | return CSSParser::parseValue(dummyStyle.get(), propertyID, normalizedValue, false, CSSStrictMode, 0); |
| 79 | } |
| 80 | |
| 81 | bool DOMWindowCSS::supports(const String& conditionText) const |
| 82 | { |
| 83 | CSSParserContext context(CSSStrictMode); |
| 84 | CSSParser parser(context); |
| 85 | return parser.parseSupportsCondition(conditionText); |
| 86 | } |
| 87 | |
| 88 | } |