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39
40#ifndef QQMLCOMPONENT_P_H
41#define QQMLCOMPONENT_P_H
42
43//
44// W A R N I N G
45// -------------
46//
47// This file is not part of the Qt API. It exists purely as an
48// implementation detail. This header file may change from version to
49// version without notice, or even be removed.
50//
51// We mean it.
52//
53
54#include "qqmlcomponent.h"
55
56#include "qqmlengine_p.h"
57#include "qqmltypeloader_p.h"
58#include <private/qbitfield_p.h>
59#include "qqmlvme_p.h"
60#include "qqmlerror.h"
61#include "qqml.h"
62#include <private/qqmlobjectcreator_p.h>
63#include <private/qqmltypedata_p.h>
64
65#include <QtCore/QString>
66#include <QtCore/QStringList>
67#include <QtCore/QList>
68
69#include <private/qobject_p.h>
70
71QT_BEGIN_NAMESPACE
72
73class QQmlComponent;
74class QQmlEngine;
75
76class QQmlComponentAttached;
77class Q_QML_PRIVATE_EXPORT QQmlComponentPrivate : public QObjectPrivate, public QQmlTypeData::TypeDataCallback
78{
79 Q_DECLARE_PUBLIC(QQmlComponent)
80
81public:
82 QQmlComponentPrivate()
83 : progress(0.), start(-1), engine(nullptr), creationContext(nullptr) {}
84
85 void loadUrl(const QUrl &newUrl, QQmlComponent::CompilationMode mode = QQmlComponent::PreferSynchronous);
86
87 QObject *beginCreate(QQmlContextData *);
88 void completeCreate();
89 void initializeObjectWithInitialProperties(QV4::QmlContext *qmlContext, const QV4::Value &valuemap, QObject *toCreate, RequiredProperties &requiredProperties);
90 static void setInitialProperties(QV4::ExecutionEngine *engine, QV4::QmlContext *qmlContext, const QV4::Value &o, const QV4::Value &v, RequiredProperties &requiredProperties, QObject *createdComponent);
91 static QQmlError unsetRequiredPropertyToQQmlError(const RequiredPropertyInfo &unsetRequiredProperty);
92
93 virtual void incubateObject(
94 QQmlIncubator *incubationTask,
95 QQmlComponent *component,
96 QQmlEngine *engine,
97 QQmlContextData *context,
98 QQmlContextData *forContext);
99
100 QQmlRefPointer<QQmlTypeData> typeData;
101 void typeDataReady(QQmlTypeData *) override;
102 void typeDataProgress(QQmlTypeData *, qreal) override;
103
104 void fromTypeData(const QQmlRefPointer<QQmlTypeData> &data);
105
106 QUrl url;
107 qreal progress;
108
109 int start;
110 RequiredProperties& requiredProperties();
111 bool hadRequiredProperties() const;
112 QQmlRefPointer<QV4::ExecutableCompilationUnit> compilationUnit;
113
114 struct ConstructionState {
115 ConstructionState()
116 : completePending(false)
117 {}
118 ~ConstructionState()
119 {
120 }
121
122 QScopedPointer<QQmlObjectCreator> creator;
123 QList<QQmlError> errors;
124 bool completePending;
125 };
126 ConstructionState state;
127
128 struct DeferredState {
129 ~DeferredState() {
130 qDeleteAll(c: constructionStates);
131 constructionStates.clear();
132 }
133 QVector<ConstructionState *> constructionStates;
134 };
135
136 static void beginDeferred(QQmlEnginePrivate *enginePriv, QObject *object, DeferredState* deferredState);
137 static void completeDeferred(QQmlEnginePrivate *enginePriv, DeferredState *deferredState);
138
139 static void complete(QQmlEnginePrivate *enginePriv, ConstructionState *state);
140 static QQmlProperty removePropertyFromRequired(QObject *createdComponent, const QString &name, RequiredProperties& requiredProperties, bool *wasInRequiredProperties = nullptr);
141
142 QQmlEngine *engine;
143 QQmlGuardedContextData creationContext;
144
145 void clear();
146
147 static QQmlComponentPrivate *get(QQmlComponent *c) {
148 return static_cast<QQmlComponentPrivate *>(QObjectPrivate::get(o: c));
149 }
150
151 QObject *doBeginCreate(QQmlComponent *q, QQmlContext *context);
152 bool setInitialProperty(QObject *component, const QString &name, const QVariant& value);
153};
154
155QT_END_NAMESPACE
156
157#endif // QQMLCOMPONENT_P_H
158

source code of qtdeclarative/src/qml/qml/qqmlcomponent_p.h