fpicker/source/office/fpsmartcontent.hxx

   1 /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
   2 /*
   3  * This file is part of the LibreOffice project.
   4  *
   5  * This Source Code Form is subject to the terms of the Mozilla Public
   6  * License, v. 2.0. If a copy of the MPL was not distributed with this
   7  * file, You can obtain one at http://mozilla.org/MPL/2.0/.
   8  *
   9  * This file incorporates work covered by the following license notice:
  10  *
  11  *   Licensed to the Apache Software Foundation (ASF) under one or more
  12  *   contributor license agreements. See the NOTICE file distributed
  13  *   with this work for additional information regarding copyright
  14  *   ownership. The ASF licenses this file to you under the Apache
  15  *   License, Version 2.0 (the "License"); you may not use this file
  16  *   except in compliance with the License. You may obtain a copy of
  17  *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
  18  */
  19
  20 #ifndef SVTOOLS_SOURCE_FILEPICKER_FPSMARTCONTENT_HXX
  21 #define SVTOOLS_SOURCE_FILEPICKER_FPSMARTCONTENT_HXX
  22
  23 #include "fpinteraction.hxx"
  24
  25 #include <com/sun/star/ucb/XCommandEnvironment.hpp>
  26 #include <com/sun/star/task/XInteractionHandler.hpp>
  27 #include <ucbhelper/content.hxx>
  28
  29 //........................................................................
  30 namespace svt
  31 {
  32 //........................................................................
  33
  34     //====================================================================
  35     //= SmartContent
  36     //====================================================================
  37     /** a "smart content" which basically wraps an UCB content, but caches some information
  38         so that repeatedly recreating it may be faster
  39     */
  40     class SmartContent
  41     {
  42     public:
  43         enum State
  44         {
  45             NOT_BOUND,  // never bound
  46             UNKNOWN,    // bound, but validity is unknown
  47             VALID,      // bound to an URL, and valid
  48             INVALID     // bound to an URL, and invalid
  49         };
  50
  51     private:
  52         OUString                                                                  m_sURL;
  53         ::ucbhelper::Content*                                                            m_pContent;
  54         State                                                                            m_eState;
  55         ::com::sun::star::uno::Reference < ::com::sun::star::ucb::XCommandEnvironment >  m_xCmdEnv;
  56         ::com::sun::star::uno::Reference < ::com::sun::star::task::XInteractionHandler > m_xOwnInteraction;
  57         ::svt::OFilePickerInteractionHandler*                                            m_pOwnInteraction;
  58
  59     private:
  60         enum Type { Folder, Document };
  61         /// checks if the currently bound content is a folder or document
  62         sal_Bool implIs( const OUString& _rURL, Type _eType );
  63
  64         SmartContent( const SmartContent& _rSource );               // never implemented
  65         SmartContent& operator=( const SmartContent& _rSource );    // never implemented
  66
  67     public:
  68         SmartContent();
  69         SmartContent( const OUString& _rInitialURL );
  70         ~SmartContent();
  71
  72     public:
  73
  74         /** create and set a specialized interaction handler at the internal used command environment.
  75
  76             @param eInterceptions
  77                     will be directly forwarded to OFilePickerInteractionHandler::enableInterceptions()
  78         */
  79         void enableOwnInteractionHandler(::svt::OFilePickerInteractionHandler::EInterceptedInteractions eInterceptions);
  80
  81         /** disable the specialized interaction handler and use the global UI interaction handler only.
  82         */
  83         void enableDefaultInteractionHandler();
  84
  85         /** return the internal used interaction handler object ...
  86             Because this pointer will be valid only, if the uno object is hold
  87             alive by it's uno reference (and this reference is set on the
  88             command environment) we must return NULL, in case this environment does
  89             not exist!
  90         */
  91         ::svt::OFilePickerInteractionHandler* getOwnInteractionHandler() const;
  92
  93         /** describes different types of interaction handlers
  94          */
  95         enum InteractionHandlerType
  96         {
  97             IHT_NONE,
  98             IHT_OWN,
  99             IHT_DEFAULT
 100         };
 101
 102         /** return the type of the internal used interaction handler object ...
 103
 104             @seealso InteractionHandlerType
 105         */
 106         InteractionHandlerType queryCurrentInteractionHandler() const;
 107
 108         /** disable internal used interaction handler object ...
 109          */
 110         void disableInteractionHandler();
 111
 112         /** returns the current state of the content
 113
 114             @seealso State
 115         */
 116         inline  State       getState( ) const { return m_eState; }
 117
 118         /** checks if the content is valid
 119             <p>Note that "not (is valid)" is not the same as "is invalid"</p>
 120         */
 121         inline  sal_Bool    isValid( ) const { return VALID == getState(); }
 122
 123         /** checks if the content is valid
 124             <p>Note that "not (is invalid)" is not the same as "is valid"</p>
 125         */
 126         inline  sal_Bool    isInvalid( ) const { return INVALID == getState(); }
 127
 128         /** checks if the content is bound
 129         */
 130         inline  sal_Bool    isBound( ) const { return NOT_BOUND != getState(); }
 131
 132         /** returns the URL of the content
 133         */
 134         inline OUString  getURL() const { return m_pContent ? m_pContent->getURL() : m_sURL; }
 135
 136         /** (re)creates the content for the given URL
 137
 138             <p>Note that getState will return either UNKNOWN or INVALID after the call returns,
 139             but never VALID. The reason is that there are content providers which allow to construct
 140             content objects, even if the respective contents are not accessible. They tell about this
 141             only upon working with the content object (e.g. when asking for the IsFolder).</p>
 142
 143             @postcond
 144                 <member>getState</member> does not return NOT_BOUND after the call returns
 145         */
 146         void    bindTo( const OUString& _rURL );
 147
 148         /** retrieves the title of the content
 149             @precond
 150                 the content is bound and not invalid
 151         */
 152         void    getTitle( OUString& /* [out] */ _rTitle );
 153
 154         /** checks if the content has a parent folder
 155             @precond
 156                 the content is bound and not invalid
 157         */
 158         sal_Bool    hasParentFolder( );
 159
 160         /** checks if sub folders below the content can be created
 161             @precond
 162                 the content is bound and not invalid
 163         */
 164         sal_Bool    canCreateFolder( );
 165
 166         /** creates a new folder with the given title and return the corresponding URL.
 167
 168             @return
 169                 the URL of the created folder or an empty string
 170           */
 171         OUString    createFolder( const OUString& _rTitle );
 172
 173         /** binds to the given URL, checks whether or not it refers to a folder
 174
 175             @postcond
 176                 the content is not in the state UNKNOWN
 177         */
 178         inline  sal_Bool    isFolder( const OUString& _rURL )
 179         {
 180             return implIs( _rURL, Folder );
 181         }
 182
 183         /** binds to the given URL, checks whether or not it refers to a document
 184
 185             @postcond
 186                 the content is not in the state UNKNOWN
 187         */
 188         inline  sal_Bool    isDocument(  const OUString& _rURL )
 189         {
 190             return implIs( _rURL, Document );
 191         }
 192
 193         /** checks if the content is existent (it is if and only if it is a document or a folder)
 194         */
 195         inline  sal_Bool    is( const OUString& _rURL )
 196         {
 197             return  implIs( _rURL, Folder ) || implIs( _rURL, Document );
 198         }
 199
 200         inline  sal_Bool    isFolder( )     { return isFolder( getURL() ); }
 201         inline  sal_Bool    isDocument( )   { return isDocument( getURL() ); }
 202         inline  sal_Bool    is( )           { return is( getURL() ); }
 203     };
 204
 205 //........................................................................
 206 } // namespace svt
 207 //........................................................................
 208
 209 #endif // SVTOOLS_SOURCE_FILEPICKER_FPSMARTCONTENT_HXX
 210
 211 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */