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qaccessiblecache.cpp

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1 /**************************************************************************** -

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4 ** Contact: https://www.qt.io/licensing/ -

5 ** -

6 ** This file is part of the QtGui module of the Qt Toolkit. -

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8 ** $QT_BEGIN_LICENSE:LGPL$ -

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10 ** Licensees holding valid commercial Qt licenses may use this file in -

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21 ** packaging of this file. Please review the following information to -

22 ** ensure the GNU Lesser General Public License version 3 requirements -

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25 ** GNU General Public License Usage -

26 ** Alternatively, this file may be used under the terms of the GNU -

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32 ** information to ensure the GNU General Public License requirements will -

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35 ** -

36 ** $QT_END_LICENSE$ -

37 ** -

38 ****************************************************************************/ -

39 -

40 #include "qaccessiblecache_p.h" -

41 -

42 #ifndef QT_NO_ACCESSIBILITY -

43 -

44 QT_BEGIN_NAMESPACE -

45 -

46 /*! -

47 \class QAccessibleCache -

48 \internal -

49 \brief Maintains a cache of accessible interfaces. -

50 */ -

51 -

Q_GLOBAL_STATIC(QAccessibleCache, qAccessibleCache)

never executed: end of block

never executed: guard.store(QtGlobalStatic::Destroyed);

never executed: return &holder.value;

guard.load() =...c::Initialized	Description
TRUE	never evaluated
FALSE	never evaluated

53 -

54 QAccessibleCache *QAccessibleCache::instance() -

55 { -

return qAccessibleCache;

never executed: return qAccessibleCache;

57 } -

58 -

59 /* -

60 The ID is always in the range [INT_MAX+1, UINT_MAX]. -

61 This makes it easy on windows to reserve the positive integer range -

62 for the index of a child and not clash with the unique ids. -

63 */ -

64 QAccessible::Id QAccessibleCache::acquireId() const -

65 { -

66 static const QAccessible::Id FirstId = QAccessible::Id(INT_MAX) + 1; -

67 static QAccessible::Id lastUsedId = FirstId; -

68 -

while (idToInterface.contains(lastUsedId)) {

idToInterface....ns(lastUsedId)	Description
TRUE	never evaluated
FALSE	never evaluated

70 // (wrap back when when we reach UINT_MAX - 1) -

71 // -1 because on Android -1 is taken for the "View" so just avoid it completely for consistency -

if (lastUsedId == UINT_MAX - 1)

lastUsedId == ...* 2U + 1U) - 1	Description
TRUE	never evaluated
FALSE	never evaluated

lastUsedId = FirstId;

never executed: lastUsedId = FirstId;

74 else -

++lastUsedId;

never executed: ++lastUsedId;

76 } -

77 -

return lastUsedId;

never executed: return lastUsedId;

79 } -

80 -

81 QAccessibleInterface *QAccessibleCache::interfaceForId(QAccessible::Id id) const -

82 { -

return idToInterface.value(id);

never executed: return idToInterface.value(id);

84 } -

85 -

86 QAccessible::Id QAccessibleCache::idForInterface(QAccessibleInterface *iface) const -

87 { -

return interfaceToId.value(iface);

never executed: return interfaceToId.value(iface);

89 } -

90 -

91 QAccessible::Id QAccessibleCache::insert(QObject *object, QAccessibleInterface *iface) const -

92 { -

93 Q_ASSERT(iface); -

94 Q_UNUSED(object) -

95 -

96 // object might be 0 -

97 Q_ASSERT(!objectToId.contains(object)); -

98 Q_ASSERT_X(!interfaceToId.contains(iface), "", "Accessible interface inserted into cache twice!"); -

99 -

100 QAccessible::Id id = acquireId(); -

101 QObject *obj = iface->object(); -

102 Q_ASSERT(object == obj); -

103

if (obj) {

obj	Description
TRUE	never evaluated
FALSE	never evaluated

104 objectToId.insert(obj, id); -

105 connect(obj, &QObject::destroyed, this, &QAccessibleCache::objectDestroyed); -

106

}

never executed: end of block

107 idToInterface.insert(id, iface); -

108 interfaceToId.insert(iface, id); -

109

return id;

never executed: return id;

110 } -

111 -

112 void QAccessibleCache::objectDestroyed(QObject* obj) -

113 { -

114 QAccessible::Id id = objectToId.value(obj); -

115

if (id) {

id	Description
TRUE	never evaluated
FALSE	never evaluated

116 Q_ASSERT_X(idToInterface.contains(id), "", "QObject with accessible interface deleted, where interface not in cache!"); -

117 deleteInterface(id, obj); -

118

}

never executed: end of block

119

}

never executed: end of block

120 -

121 void QAccessibleCache::deleteInterface(QAccessible::Id id, QObject *obj) -

122 { -

123 QAccessibleInterface *iface = idToInterface.take(id); -

124 interfaceToId.take(iface); -

125

if (!obj)

!obj	Description
TRUE	never evaluated
FALSE	never evaluated

126

obj = iface->object();

never executed: obj = iface->object();

127

if (obj)

obj	Description
TRUE	never evaluated
FALSE	never evaluated

128

objectToId.remove(obj);

never executed: objectToId.remove(obj);

129 delete iface; -

130 -

131 #ifdef Q_OS_MAC -

132 removeCocoaElement(id); -

133 #endif -

134

}

never executed: end of block

135 -

136 QT_END_NAMESPACE -

137 -

138 #endif -

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