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Diffstat (limited to 'forms/source/xforms/binding.hxx')
| -rw-r--r-- | forms/source/xforms/binding.hxx | 407 |
1 files changed, 407 insertions, 0 deletions
diff --git a/forms/source/xforms/binding.hxx b/forms/source/xforms/binding.hxx new file mode 100644 index 000000000..d7201a5b5 --- /dev/null +++ b/forms/source/xforms/binding.hxx @@ -0,0 +1,407 @@ +/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */ +/* + * This file is part of the LibreOffice project. + * + * This Source Code Form is subject to the terms of the Mozilla Public + * License, v. 2.0. If a copy of the MPL was not distributed with this + * file, You can obtain one at http://mozilla.org/MPL/2.0/. + * + * This file incorporates work covered by the following license notice: + * + * Licensed to the Apache Software Foundation (ASF) under one or more + * contributor license agreements. See the NOTICE file distributed + * with this work for additional information regarding copyright + * ownership. The ASF licenses this file to you under the Apache + * License, Version 2.0 (the "License"); you may not use this file + * except in compliance with the License. You may obtain a copy of + * the License at http://www.apache.org/licenses/LICENSE-2.0 . + */ + +#pragma once + +#include <com/sun/star/uno/Reference.hxx> +#include <cppuhelper/implbase.hxx> +#include "propertysetbase.hxx" +#include <com/sun/star/form/binding/XValueBinding.hpp> +#include <com/sun/star/form/binding/XListEntrySource.hpp> +#include <com/sun/star/form/validation/XValidator.hpp> +#include <com/sun/star/util/XModifyBroadcaster.hpp> +#include <com/sun/star/container/XNamed.hpp> +#include <com/sun/star/xml/dom/events/XEventListener.hpp> +#include <com/sun/star/lang/XUnoTunnel.hpp> +#include <com/sun/star/util/XCloneable.hpp> + +#include "pathexpression.hxx" +#include "boolexpression.hxx" +#include "mip.hxx" +#include <rtl/ustring.hxx> +#include <vector> + +// forward declaractions +namespace xforms +{ + class Model; + class EvaluationContext; +} +namespace com::sun::star { + namespace xml { + namespace xpath { class XXPathAPI; } + namespace dom + { + class XNode; + class XNodeList; + } + } + namespace container { class XNameContainer; } + namespace xforms { class XModel; } + namespace xsd { class XDataType; } +} + + +namespace xforms +{ + +/** An XForms Binding. Contains: + * # a connection to its model + * # an ID + * # a binding expression + * # model item properties + * # (NOT YET IMPLEMENTED) child bindings (sequence of) + * + * See http://www.w3.org/TR/xforms/ for more information. + */ + +typedef cppu::ImplInheritanceHelper< + PropertySetBase, + css::form::binding::XValueBinding, + css::form::binding::XListEntrySource, + css::form::validation::XValidator, + css::util::XModifyBroadcaster, + css::container::XNamed, + css::xml::dom::events::XEventListener, + css::lang::XUnoTunnel, + css::util::XCloneable +> Binding_t; + +class Binding : public Binding_t +{ +public: + typedef std::vector<css::uno::Reference<css::util::XModifyListener> > ModifyListeners_t; + typedef std::vector<css::uno::Reference<css::form::validation::XValidityConstraintListener> > XValidityConstraintListeners_t; + typedef std::vector<css::uno::Reference<css::form::binding::XListEntryListener> > XListEntryListeners_t; + + +private: + + /// the Model to which this Binding belongs; may be NULL + css::uno::Reference<css::xforms::XModel> mxModel; + + /// binding-ID. A document-wide unique ID for this binding element. + OUString msBindingID; + + /// an XPath-expression to be instantiated on the data instance + PathExpression maBindingExpression; + + /// an XPath-expression to determine read-only status + BoolExpression maReadonly; + + /// an XPath-expression to determine relevance + BoolExpression maRelevant; + + /// an XPath-expression to determine if item is required + BoolExpression maRequired; + + /// an XPath-expression to determine if item is valid + BoolExpression maConstraint; + + /// user-readable explanation of the constraint + OUString msExplainConstraint; + + /// an XPath-expression to calculate values + ComputedExpression maCalculate; + + /// the XML namespaces used for XML names/XPath-expressions in this binding + css::uno::Reference<css::container::XNameContainer> mxNamespaces; + + /// a type name + OUString msTypeName; + + /// modify listeners + ModifyListeners_t maModifyListeners; + + /// list entry listener + XListEntryListeners_t maListEntryListeners; + + /// validity listeners; + XValidityConstraintListeners_t maValidityListeners; + + /// nodes on which we are listening for events + std::vector<css::uno::Reference<css::xml::dom::XNode> > maEventNodes; + + /// the current MIP object for the first node we are bound to + MIP maMIP; + + /// flag to detect recursions in calculate + bool mbInCalculate; + + // flags to manage deferred notifications: + /// if >0, valueModified() and bindingModified() will only set flags + sal_Int32 mnDeferModifyNotifications; + bool mbValueModified; /// if true, valueModified needs to be called + bool mbBindingModified; /// if true, bindingModified needs to be called + + + void initializePropertySet(); + + +public: + Binding(); + virtual ~Binding() override; + + + // property methods: get/set value + + + css::uno::Reference<css::xforms::XModel> getModel() const { return mxModel;} /// get XForms model + void _setModel( const css::uno::Reference<css::xforms::XModel>& ); /// set XForms model (only called by Model) + + + OUString getModelID() const; /// get ID of XForms model + + OUString getBindingID() const { return msBindingID;} /// get ID for this binding + void setBindingID( const OUString& ); /// set ID for this binding + + OUString getBindingExpression() const; /// get binding expression + void setBindingExpression( const OUString& ); /// set binding exp. + + // MIPs (model item properties) + + OUString getReadonlyExpression() const; /// get read-only MIP + void setReadonlyExpression( const OUString& ); /// set read-only MIP + + OUString getRelevantExpression() const; /// get relevant MIP + void setRelevantExpression( const OUString& ); /// set relevant MIP + + OUString getRequiredExpression() const; /// get required MIP + void setRequiredExpression( const OUString& ); /// set required MIP + + OUString getConstraintExpression() const; /// get constraint MIP + void setConstraintExpression( const OUString& );/// set constraint MIP + + OUString getCalculateExpression() const; /// get calculate MIP + void setCalculateExpression( const OUString& ); /// set calculate MIP + + OUString getType() const { return msTypeName;} /// get type name MIP (static) + void setType( const OUString& ); /// set type name MIP (static) + + // a binding expression can only be interpreted with respect to + // suitable namespace declarations. We collect those in the model and in a binding. + + // access to a binding's namespace + // (set-method only changes local namespaces (but may add to model)) + css::uno::Reference<css::container::XNameContainer> getBindingNamespaces() const { return mxNamespaces; } + void setBindingNamespaces( const css::uno::Reference<css::container::XNameContainer>& ); /// get binding nmsp. + + // access to the model's namespaces + // (set-method changes model's namespaces (unless a local one is present)) + css::uno::Reference<css::container::XNameContainer> getModelNamespaces() const; /// set model namespaces + void setModelNamespaces( const css::uno::Reference<css::container::XNameContainer>& ); /// get model nmsp. + + + // read-only properties that map MIPs to control data source properties + bool getReadOnly() const; // MIP readonly + bool getRelevant() const; // MIP relevant + bool getExternalData() const; // mapped from model's ExternalData property + + + // missing binding properties: + // - type (static; default: xsd:string) + // - minOccurs/maxOccurs (computed XPath; default: 0/inf) + // - p3ptype (static; no default) + + + /// get this binding's context node + xforms::EvaluationContext getEvaluationContext() const; + + /// get evaluation contexts for this binding's MIPs + std::vector<xforms::EvaluationContext> getMIPEvaluationContexts(); + + /// get nodeset the bind is bound to + css::uno::Reference<css::xml::dom::XNodeList> getXNodeList(); + + /// heuristically determine whether this binding is simple binding + /// (here: simple binding == does not depend on other parts of the + /// instance, it's not a 'dynamic' binding) + bool isSimpleBinding() const; + + /// heuristically determine whether this binding's binding + /// expression is simple + bool isSimpleBindingExpression() const; + + /// update this binding (e.g. called by model for refresh ) + void update(); + + /// prevent change notifications being sent to controls + void deferNotifications( bool ); + + /// is this binding valid? (are constraint, type and required MIPs ok?) + bool isValid() const; + + /// determine whether this binding currently performs a useful + /// function, r whether is may be discarded + bool isUseful() const; + + /// explain why binding is invalid + OUString explainInvalid(); + + + // the ID for XUnoTunnel calls + static css::uno::Sequence<sal_Int8> getUnoTunnelId(); + + +private: + /// check whether object is live, and throw suitable exception if not + /// (to be used be API methods before acting on the object) + /// + /// @throws css::uno::RuntimeException + void checkLive(); + + /// determine whether object is live + /// live: has model, and model has been initialized + bool isLive() const; + + /// get the model implementation + xforms::Model* getModelImpl() const; + + /// get MIP evaluation contexts + /// (only valid if control has already been bound) + std::vector<xforms::EvaluationContext> _getMIPEvaluationContexts() const; + + /// bind this binding, and pre-compute the affected nodes + void bind( bool bForceRebind = false ); + + /// the binding value has been changed: + /// trigger a modified event on all modified listeners + void valueModified(); + + /// the binding itself has changed: + /// force rebind, then call valueModified() + void bindingModified(); + + + /// set MIPs defined by this binding on MIP item + MIP getLocalMIP() const; + + /// get the data type that applies to this binding + css::uno::Reference<css::xsd::XDataType> getDataType() const; + + /// determine whether binding is valid according to the given data type + bool isValid_DataType() const; + + /// explain validity of binding with respect to the given data type + OUString explainInvalid_DataType(); + + /// 'clear' this binding - remove all listeners, etc. + void clear(); + + /// distribute MIPs from current node recursively to children + void distributeMIP( const css::uno::Reference<css::xml::dom::XNode> &rxNode ); + + /// implement get*Namespaces() + css::uno::Reference<css::container::XNameContainer> _getNamespaces() const; + + /// implement set*Namespaces() + void _setNamespaces( const css::uno::Reference<css::container::XNameContainer>&, bool bBinding ); + + /// set a useful default binding ID (if none is set) + void _checkBindingID(); + +public: + + virtual css::uno::Sequence<css::uno::Type> SAL_CALL getSupportedValueTypes() override; + + virtual sal_Bool SAL_CALL supportsType( const css::uno::Type& aType ) override; + + virtual css::uno::Any SAL_CALL getValue( const css::uno::Type& aType ) override; + + virtual void SAL_CALL setValue( const css::uno::Any& aValue ) override; + + + // XListEntrySource + + + virtual sal_Int32 SAL_CALL getListEntryCount() override; + + virtual OUString SAL_CALL getListEntry( sal_Int32 nPosition ) override; + + virtual css::uno::Sequence<OUString> SAL_CALL getAllListEntries() override; + + virtual void SAL_CALL addListEntryListener( const css::uno::Reference<css::form::binding::XListEntryListener>& ) override; + + virtual void SAL_CALL removeListEntryListener( const css::uno::Reference<css::form::binding::XListEntryListener>&) override; + + + // XValidator: + + + virtual sal_Bool SAL_CALL isValid( + const css::uno::Any& ) override; + + virtual OUString SAL_CALL explainInvalid( + const css::uno::Any& ) override; + + virtual void SAL_CALL addValidityConstraintListener( + const css::uno::Reference<css::form::validation::XValidityConstraintListener>& xListener ) override; + + virtual void SAL_CALL removeValidityConstraintListener( + const css::uno::Reference<css::form::validation::XValidityConstraintListener>& xListener ) override; + + + // XModifyBroadcaster & friends: + // inform listeners about changes in our values + + +public: + + virtual void SAL_CALL addModifyListener( + const css::uno::Reference<css::util::XModifyListener>& xListener ) override; + + virtual void SAL_CALL removeModifyListener( + const css::uno::Reference<css::util::XModifyListener>& xListener ) override; + + + // XNamed: + // get/set name + + +public: + + virtual OUString SAL_CALL getName() override; + + virtual void SAL_CALL setName( const OUString& ) override; + + + // xml::dom::event::XEventListener + // receive an event if our node changed + + + virtual void SAL_CALL handleEvent( + const css::uno::Reference<css::xml::dom::events::XEvent>& xEvent ) override; + + + // XUnoTunnel + + + virtual sal_Int64 SAL_CALL getSomething( const css::uno::Sequence<sal_Int8>& ) override; + + + // XCloneable + + + virtual css::uno::Reference<css::util::XCloneable> SAL_CALL createClone() override; +}; + + +} // namespace xforms + +/* vim:set shiftwidth=4 softtabstop=4 expandtab: */ |