1 /* 2 * Copyright (C) 2014 Google 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 * * Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * * Redistributions in binary form must reproduce the above 11 * copyright notice, this list of conditions and the following disclaimer 12 * in the documentation and/or other materials provided with the 13 * distribution. 14 * * Neither the name of Google Inc. nor the names of its 15 * contributors may be used to endorse or promote products derived from 16 * this software without specific prior written permission. 17 * 18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 19 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 20 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 21 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 22 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 23 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 24 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 25 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 26 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 27 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 28 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 29 */ 30 31 #ifndef HTMLImportState_h 32 #define HTMLImportState_h 33 34 #include "wtf/Assertions.h" 35 36 namespace blink { 37 38 class HTMLImportState { 39 public: 40 enum Value { 41 BlockingScriptExecution = 0, 42 Active, 43 Ready, 44 Invalid 45 }; 46 47 explicit HTMLImportState(Value value = BlockingScriptExecution) 48 : m_value(value) 49 { } 50 51 bool shouldBlockScriptExecution() const { return checkedValue() <= BlockingScriptExecution; } 52 bool isReady() const { return checkedValue() == Ready; } 53 bool isValid() const { return m_value != Invalid; } 54 bool operator==(const HTMLImportState& other) const { return m_value == other.m_value; } 55 bool operator!=(const HTMLImportState& other) const { return !(*this == other); } 56 bool operator<=(const HTMLImportState& other) const { return m_value <= other.m_value; } 57 58 #if !defined(NDEBUG) 59 Value peekValueForDebug() const { return m_value; } 60 #endif 61 62 static HTMLImportState invalidState() { return HTMLImportState(Invalid); } 63 static HTMLImportState blockedState() { return HTMLImportState(BlockingScriptExecution); } 64 private: 65 Value checkedValue() const; 66 Value m_value; 67 }; 68 69 inline HTMLImportState::Value HTMLImportState::checkedValue() const 70 { 71 ASSERT(isValid()); 72 return m_value; 73 } 74 75 } 76 77 #endif 78