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 WebCore {
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)
m_value(value)48 : m_value(value)
49 { }
50
shouldBlockScriptExecution()51 bool shouldBlockScriptExecution() const { return checkedValue() <= BlockingScriptExecution; }
isReady()52 bool isReady() const { return checkedValue() == Ready; }
isValid()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)
peekValueForDebug()59 Value peekValueForDebug() const { return m_value; }
60 #endif
61
invalidState()62 static HTMLImportState invalidState() { return HTMLImportState(Invalid); }
blockedState()63 static HTMLImportState blockedState() { return HTMLImportState(BlockingScriptExecution); }
64 private:
65 Value checkedValue() const;
66 Value m_value;
67 };
68
checkedValue()69 inline HTMLImportState::Value HTMLImportState::checkedValue() const
70 {
71 ASSERT(isValid());
72 return m_value;
73 }
74
75 }
76
77 #endif
78