1 | /**************************************************************************** |
2 | ** |
3 | ** Copyright (C) 2016 The Qt Company Ltd. |
4 | ** Contact: https://www.qt.io/licensing/ |
5 | ** |
6 | ** This file is part of the QtQml module of the Qt Toolkit. |
7 | ** |
8 | ** $QT_BEGIN_LICENSE:LGPL$ |
9 | ** Commercial License Usage |
10 | ** Licensees holding valid commercial Qt licenses may use this file in |
11 | ** accordance with the commercial license agreement provided with the |
12 | ** Software or, alternatively, in accordance with the terms contained in |
13 | ** a written agreement between you and The Qt Company. For licensing terms |
14 | ** and conditions see https://www.qt.io/terms-conditions. For further |
15 | ** information use the contact form at https://www.qt.io/contact-us. |
16 | ** |
17 | ** GNU Lesser General Public License Usage |
18 | ** Alternatively, this file may be used under the terms of the GNU Lesser |
19 | ** General Public License version 3 as published by the Free Software |
20 | ** Foundation and appearing in the file LICENSE.LGPL3 included in the |
21 | ** packaging of this file. Please review the following information to |
22 | ** ensure the GNU Lesser General Public License version 3 requirements |
23 | ** will be met: https://www.gnu.org/licenses/lgpl-3.0.html. |
24 | ** |
25 | ** GNU General Public License Usage |
26 | ** Alternatively, this file may be used under the terms of the GNU |
27 | ** General Public License version 2.0 or (at your option) the GNU General |
28 | ** Public license version 3 or any later version approved by the KDE Free |
29 | ** Qt Foundation. The licenses are as published by the Free Software |
30 | ** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3 |
31 | ** included in the packaging of this file. Please review the following |
32 | ** information to ensure the GNU General Public License requirements will |
33 | ** be met: https://www.gnu.org/licenses/gpl-2.0.html and |
34 | ** https://www.gnu.org/licenses/gpl-3.0.html. |
35 | ** |
36 | ** $QT_END_LICENSE$ |
37 | ** |
38 | ****************************************************************************/ |
39 | |
40 | #include "qqmlwatcher.h" |
41 | |
42 | #include "qqmlexpression.h" |
43 | #include "qqmlcontext.h" |
44 | #include "qqml.h" |
45 | |
46 | #include <private/qqmldebugservice_p.h> |
47 | #include <private/qqmlproperty_p.h> |
48 | #include <private/qqmlvaluetype_p.h> |
49 | |
50 | #include <QtCore/qmetaobject.h> |
51 | #include <QtCore/qdebug.h> |
52 | |
53 | QT_BEGIN_NAMESPACE |
54 | |
55 | |
56 | class QQmlWatchProxy : public QObject |
57 | { |
58 | Q_OBJECT |
59 | public: |
60 | QQmlWatchProxy(int id, |
61 | QObject *object, |
62 | int debugId, |
63 | const QMetaProperty &prop, |
64 | QQmlWatcher *parent = nullptr); |
65 | |
66 | QQmlWatchProxy(int id, |
67 | QQmlExpression *exp, |
68 | int debugId, |
69 | QQmlWatcher *parent = nullptr); |
70 | |
71 | public slots: |
72 | void notifyValueChanged(); // Needs to be a slot because of QQmlPropertyPrivate::connect() |
73 | |
74 | private: |
75 | friend class QQmlWatcher; |
76 | int m_id; |
77 | QQmlWatcher *m_watch; |
78 | QObject *m_object; |
79 | int m_debugId; |
80 | QMetaProperty m_property; |
81 | |
82 | QQmlExpression *m_expr; |
83 | }; |
84 | |
85 | QQmlWatchProxy::QQmlWatchProxy(int id, |
86 | QQmlExpression *exp, |
87 | int debugId, |
88 | QQmlWatcher *parent) |
89 | : QObject(parent), m_id(id), m_watch(parent), m_object(nullptr), m_debugId(debugId), m_expr(exp) |
90 | { |
91 | QObject::connect(sender: m_expr, signal: &QQmlExpression::valueChanged, |
92 | receiver: this, slot: &QQmlWatchProxy::notifyValueChanged); |
93 | } |
94 | |
95 | QQmlWatchProxy::QQmlWatchProxy(int id, |
96 | QObject *object, |
97 | int debugId, |
98 | const QMetaProperty &prop, |
99 | QQmlWatcher *parent) |
100 | : QObject(parent), m_id(id), m_watch(parent), m_object(object), m_debugId(debugId), m_property(prop), m_expr(nullptr) |
101 | { |
102 | static int refreshIdx = -1; |
103 | if(refreshIdx == -1) |
104 | refreshIdx = QQmlWatchProxy::staticMetaObject.indexOfMethod(method: "notifyValueChanged()" ); |
105 | |
106 | if (prop.hasNotifySignal()) |
107 | QQmlPropertyPrivate::connect(sender: m_object, signal_index: prop.notifySignalIndex(), receiver: this, method_index: refreshIdx); |
108 | } |
109 | |
110 | void QQmlWatchProxy::notifyValueChanged() |
111 | { |
112 | const QVariant v = m_expr ? m_expr->evaluate() : m_property.read(obj: m_object); |
113 | emit m_watch->propertyChanged(id: m_id, objectId: m_debugId, property: m_property, value: v); |
114 | } |
115 | |
116 | |
117 | QQmlWatcher::QQmlWatcher(QObject *parent) |
118 | : QObject(parent) |
119 | { |
120 | } |
121 | |
122 | bool QQmlWatcher::addWatch(int id, quint32 debugId) |
123 | { |
124 | QObject *object = QQmlDebugService::objectForId(id: debugId); |
125 | if (object) { |
126 | int propCount = object->metaObject()->propertyCount(); |
127 | for (int ii=0; ii<propCount; ii++) |
128 | addPropertyWatch(id, object, objectId: debugId, property: object->metaObject()->property(index: ii)); |
129 | return true; |
130 | } |
131 | return false; |
132 | } |
133 | |
134 | bool QQmlWatcher::addWatch(int id, quint32 debugId, const QByteArray &property) |
135 | { |
136 | QObject *object = QQmlDebugService::objectForId(id: debugId); |
137 | if (object) { |
138 | int index = object->metaObject()->indexOfProperty(name: property.constData()); |
139 | if (index >= 0) { |
140 | addPropertyWatch(id, object, objectId: debugId, property: object->metaObject()->property(index)); |
141 | return true; |
142 | } |
143 | } |
144 | return false; |
145 | } |
146 | |
147 | bool QQmlWatcher::addWatch(int id, quint32 objectId, const QString &expr) |
148 | { |
149 | QObject *object = QQmlDebugService::objectForId(id: objectId); |
150 | QQmlContext *context = qmlContext(object); |
151 | if (context) { |
152 | QQmlExpression *exprObj = new QQmlExpression(context, object, expr); |
153 | exprObj->setNotifyOnValueChanged(true); |
154 | QQmlWatchProxy *proxy = new QQmlWatchProxy(id, exprObj, objectId, this); |
155 | exprObj->setParent(proxy); |
156 | m_proxies[id].append(t: proxy); |
157 | proxy->notifyValueChanged(); |
158 | return true; |
159 | } |
160 | return false; |
161 | } |
162 | |
163 | bool QQmlWatcher::removeWatch(int id) |
164 | { |
165 | if (!m_proxies.contains(akey: id)) |
166 | return false; |
167 | |
168 | QList<QPointer<QQmlWatchProxy> > proxies = m_proxies.take(akey: id); |
169 | qDeleteAll(c: proxies); |
170 | return true; |
171 | } |
172 | |
173 | void QQmlWatcher::addPropertyWatch(int id, QObject *object, quint32 debugId, const QMetaProperty &property) |
174 | { |
175 | QQmlWatchProxy *proxy = new QQmlWatchProxy(id, object, debugId, property, this); |
176 | m_proxies[id].append(t: proxy); |
177 | |
178 | proxy->notifyValueChanged(); |
179 | } |
180 | |
181 | QT_END_NAMESPACE |
182 | |
183 | #include <qqmlwatcher.moc> |
184 | |
185 | #include "moc_qqmlwatcher.cpp" |
186 | |