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       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 SD_OUTLINER_HXX
      21             : #define SD_OUTLINER_HXX
      22             : 
      23             : #include <svx/svdobj.hxx>
      24             : #include <svx/svdoutl.hxx>
      25             : #include "pres.hxx"
      26             : #include "OutlinerIterator.hxx"
      27             : #include <editeng/SpellPortions.hxx>
      28             : #include <memory>
      29             : #include <boost/shared_ptr.hpp>
      30             : #include <boost/weak_ptr.hpp>
      31             : #include <boost/noncopyable.hpp>
      32             : 
      33             : class Dialog;
      34             : class SdrObject;
      35             : class SdrTextObj;
      36             : class SdDrawDocument;
      37             : 
      38             : namespace sd {
      39             : 
      40             : class View;
      41             : class ViewShell;
      42             : class Window;
      43             : 
      44             : /** The main purpose of this class is searching and replacing as well as
      45             :     spelling of impress documents.  The main part of both tasks lies in
      46             :     iterating over the pages and view modes of a document and apply the
      47             :     respective function to all objects containing text on those pages.
      48             : 
      49             :     <p>Relevant objects: There are two sets of objects to search/spell
      50             :     check.  One is the set of all selected objects.  The other consists of
      51             :     all objects on all pages in draw-, notes-, and handout view as well as
      52             :     slide- and background view (draw pages and master pages).</p>
      53             : 
      54             :     <p>Iteration: Search/replace and spelling functions operate on shapes
      55             :     containing text.  To cover all relevant objects an order has to be
      56             :     defined on the objects.  For the set of all selected objects this order
      57             :     is simply the order in which they can be retrieved from the selection
      58             :     object.<br>
      59             :     When there is no selection the order is nested.  The three modes of the
      60             :     draw view are on the outer level: draw mode, notes mode, handout mode.
      61             :     The inner level switches between draw pages and master pages.  This
      62             :     leads to the following order:
      63             :     <ol>
      64             :     <li>draw pages of draw mode</li>
      65             :     <li>master pages of draw mode</li>
      66             :     <li>draw pages of notes mode</li>
      67             :     <li>master pages of notes mode</li>
      68             :     <li>draw pages of handout mode</li>
      69             :     <li>master pages of handout mode</li>
      70             :     </ol>
      71             :     Iteration starts at the top of the current page.  When reaching the end
      72             :     of the document, i.e. the last master page of the handout mode, it jumps
      73             :     to the first draw page of draw mode.  In backward searches this order is
      74             :     reversed.  When doing a <em>replace all</em> then the whole document is
      75             :     searched for matches starting at the first page of the draw/slide view
      76             :     (or last page of handout/background view even though search
      77             :     direction).</p>
      78             : 
      79             :     <p>The start position is restored after finishing spell checking or
      80             :     replacing all matches in a document.</p>
      81             : 
      82             :     <p>Some related pieces of information:
      83             :     The search dialog (<type>SvxSearchDialog</type>) can be controlled in
      84             :     more than one way:
      85             :     <ul><li>A set of option flags returned by the slot call
      86             :     SID_SEARCH_OPTIONS handled by the
      87             :     <member>SdDrawDocument::GetState()</member> method.</li>
      88             :     <li>The contents of the search item of type
      89             :     <type>SvxSearchItem</type>.</li>
      90             :     <li>The <member>HasSelection()</member> view shell method that returns
      91             :     whether or not a selection exists.  However, it is called from the
      92             :     search dialog with an argument so that only text selections are
      93             :     queried.  This is only sufficient for searching the outline view.
      94             :     </p>
      95             : */
      96             : class Outliner
      97             :     : public SdrOutliner,
      98             :       public ::boost::noncopyable
      99             : {
     100             : public:
     101             :     friend class ::sd::outliner::OutlinerContainer;
     102             : 
     103             :     /** Create a new sd outliner object.
     104             :         @param pDoc
     105             :             The draw document from which to take the content.
     106             :         @param nMode
     107             :             The valid values <const>OUTLINERMODE_DONTKNOW</const>,
     108             :             <const>OUTLINERMODE_TEXTOBJECT</const>,
     109             :             <const>OUTLINERMODE_TITLEOBJECT</const>,
     110             :             <const>OUTLINERMODE_OUTLINEOBJECT</const>, and
     111             :             <const>OUTLINERMODE_OUTLINEVIEW</const> are defined in
     112             :             editeng/outliner.hxx.
     113             :     */
     114             :     Outliner( SdDrawDocument* pDoc, sal_uInt16 nMode );
     115             :     virtual ~Outliner();
     116             : 
     117             :     /** Despite the name this method is called prior to spell cheking *and*
     118             :         searching and replacing.  The position of current view
     119             :         mode/page/object/caret position is remembered and, depending on the
     120             :         search mode, may be restored after finishing searching/spell
     121             :         checking.
     122             :     */
     123             :     void PrepareSpelling (void);
     124             : 
     125             :     /** Initialize a spell check but do not start it yet.  This method
     126             :         is a better candiate for the name PrepareSpelling.
     127             :     */
     128             :     void StartSpelling (void);
     129             : 
     130             :     /** Proxy for method from base class to avoid compiler warning */
     131             :     void StartSpelling(EditView&, unsigned char);
     132             : 
     133             :     /** Initiate a find and/or replace on the next relevant text object.
     134             :         @return
     135             :             Returns </sal_True> when the search/replace is finished (as
     136             :             indicated by user input to the search dialog).  A </sal_False> value
     137             :             indicates that another call to this method is required.
     138             :     */
     139             :     bool StartSearchAndReplace (const SvxSearchItem* pSearchItem);
     140             : 
     141             :     /** Iterate over the sentences in all text shapes and stop at the
     142             :         next sentence with spelling errors. While doing so the view
     143             :         mode may be changed and text shapes are set into edit mode.
     144             :     */
     145             :     ::svx::SpellPortions GetNextSpellSentence (void);
     146             : 
     147             :     /** Release all resources that have been created during the find&replace
     148             :         or spell check.
     149             :     */
     150             :     void EndSpelling (void);
     151             : 
     152             :     /** callback for textconversion */
     153             :     sal_Bool ConvertNextDocument (void);
     154             : 
     155             :     /** Starts the text conversion (hangul/hanja or Chinese simplified/traditional)
     156             :     for the current viewshell */
     157             :     void StartConversion( sal_Int16 nSourceLanguage,  sal_Int16 nTargetLanguage,
     158             :                 const Font *pTargetFont, sal_Int32 nOptions, sal_Bool bIsInteractive );
     159             : 
     160             :     /** This is called internaly when text conversion is started.
     161             :         The position of current view mode/page/object/caret position
     162             :         is remembered and will be restored after conversion.
     163             :     */
     164             :     void BeginConversion (void);
     165             : 
     166             :     /** Release all resources that have been created during the conversion */
     167             :     void EndConversion (void);
     168             : 
     169             :     DECL_LINK( SpellError, void * );
     170             : 
     171             :     enum ChangeHint { CH_VIEW_SHELL_INVALID, CH_VIEW_SHELL_VALID };
     172             : 
     173           0 :     int         GetIgnoreCurrentPageChangesLevel() const     { return mnIgnoreCurrentPageChangesLevel; };
     174           0 :     void        IncreIgnoreCurrentPageChangesLevel()     { mnIgnoreCurrentPageChangesLevel++; };
     175           0 :     void        DecreIgnoreCurrentPageChangesLevel()     { mnIgnoreCurrentPageChangesLevel--; };
     176             : 
     177             : private:
     178             :     class Implementation;
     179             :     ::std::auto_ptr<Implementation> mpImpl;
     180             : 
     181             :     /// Specifies whether to search and replace, to spell check or to do a
     182             :     /// text conversion.
     183             :     enum mode {SEARCH, SPELL, TEXT_CONVERSION} meMode;
     184             : 
     185             :     /// The view which displays the searched objects.
     186             :     ::sd::View* mpView;
     187             :     /** The view shell containing the view.  It is held as weak
     188             :         pointer to avoid keeping it alive when the view is changed
     189             :         during searching.
     190             :     */
     191             :     ::boost::weak_ptr<ViewShell> mpWeakViewShell;
     192             :     /// This window contains the view.
     193             :     ::sd::Window* mpWindow;
     194             :     /// The document on whose objects and pages this class operates.
     195             :     SdDrawDocument* mpDrawDocument;
     196             : 
     197             :     /** this is the language that is used for current text conversion.
     198             :         Only valid if meMode is TEXT_CONVERSION.
     199             :     */
     200             :     sal_Int16 mnConversionLanguage;
     201             : 
     202             :     /** While the value of this flag is greater than 0 changes of the current page
     203             :         do not lead to selecting the corresponding text in the outliner.
     204             :     */
     205             :     int mnIgnoreCurrentPageChangesLevel;
     206             : 
     207             :     /// Specifies whether the search string has been found so far.
     208             :     bool mbStringFound;
     209             : 
     210             :     /** This flag indicates whether there may exist a match of the search
     211             :         string before/after the current position in the document.  It can be
     212             :         set to </sal_False> only when starting from the beginning/end of the
     213             :         document.  When reaching the end/beginning with it still be set to
     214             :         </sal_False> then there exists no match and the search can be terminated.
     215             :     */
     216             :     bool mbMatchMayExist;
     217             : 
     218             :     /// The number of pages in the current view.
     219             :     sal_uInt16 mnPageCount;
     220             : 
     221             :     /// Number of objects on the current page / in the current selection.
     222             :     sal_Int32 mnObjectCount;
     223             : 
     224             :     /** A <TRUE/> value indicates that the end of the find&replace or spell
     225             :         check has been reached.
     226             :     */
     227             :     bool mbEndOfSearch;
     228             : 
     229             :     /** Set to <TRUE/> when an object has been prepared successfully for
     230             :         searching/spell checking.  This flag directs the internal iteration
     231             :         which stops when set to </sal_True>.
     232             :     */
     233             :     bool mbFoundObject;
     234             : 
     235             :     /** When set to <TRUE/> this flag indicates that an error has occurred
     236             :         that should terminate the iteration over the objects to search/spell
     237             :         check.
     238             :     */
     239             :     bool mbError;
     240             : 
     241             :     /** This flag indicates whether to search forward or backwards.
     242             :     */
     243             :     bool mbDirectionIsForward;
     244             : 
     245             :     /** This flag indicates that only the selected objects are to be
     246             :         searched.
     247             :     */
     248             :     bool mbRestrictSearchToSelection;
     249             : 
     250             :     /** When the search is restricted to the current selection then
     251             :         this list contains pointers to all the objects of the
     252             :         selection.  This copy is necessary because during the search
     253             :         process the mark list is modified.
     254             :     */
     255             :     ::std::vector<SdrObjectWeakRef> maMarkListCopy;
     256             : 
     257             :     /**  This flag inidcates that only the current view is to be used for
     258             :          searching and spelling.  Automatically switching to other view does
     259             :          not take place when this flag is set.
     260             :     */
     261             :     bool mbProcessCurrentViewOnly;
     262             : 
     263             :     /** Current object that may be a text object.  The object pointer to
     264             :         corresponds to <member>mnObjIndex</member>.  While iterating over the
     265             :         objects on a page <member>mpObj</member> will point to every object
     266             :         while <member>mpTextObj</member> will be set only to valid text
     267             :         objects.
     268             :     */
     269             :     SdrObject* mpObj;
     270             : 
     271             :     /** this stores the first object that is used for text conversion.
     272             :         Conversion automaticly wraps around the document and stops when it
     273             :         finds this object again.
     274             :     */
     275             :     SdrObject* mpFirstObj;
     276             : 
     277             :     /// Candidate for being searched/spell checked.
     278             :     SdrTextObj* mpTextObj;
     279             : 
     280             :     /// Current text to be searched/spelled inside the current text object
     281             :     sal_Int32 mnText;
     282             : 
     283             :     /// Paragraph object of <member>mpTextObj</member>.
     284             :     OutlinerParaObject* mpParaObj;
     285             : 
     286             :     /// The view mode that was active when starting to search/spell check.
     287             :     PageKind meStartViewMode;
     288             : 
     289             :     /// The master page mode that was active when starting to search/spell check.
     290             :     EditMode meStartEditMode;
     291             : 
     292             :     /// The current page index on starting to search/spell check.
     293             :     sal_uInt16 mnStartPageIndex;
     294             : 
     295             :     /// The object in edit mode when searching /spell checking was started
     296             :     /// (if any).
     297             :     SdrObject* mpStartEditedObject;
     298             : 
     299             :     /// The position of the caret when searching /spell checking was started.
     300             :     ESelection maStartSelection;
     301             : 
     302             :     /** The search item contains various attributes that define the type of
     303             :         search.  It is set every time the
     304             :         <member>SearchAndReplaceAll</member> method is called.
     305             :     */
     306             :     const SvxSearchItem* mpSearchItem;
     307             : 
     308             :     /// The actual object iterator.
     309             :     ::sd::outliner::Iterator maObjectIterator;
     310             :     /// The current position of the object iterator.
     311             :     ::sd::outliner::IteratorPosition maCurrentPosition;
     312             :     /// The position when the search started.  Corresponds largely to the
     313             :     /// m?Start* members.
     314             :     ::sd::outliner::Iterator maSearchStartPosition;
     315             :     /** The last valid position desribes where the last text object has been
     316             :         found.  This position is restored when some dialogs are shown.  The
     317             :         position is initially set to the where the search begins.
     318             :     */
     319             :     ::sd::outliner::IteratorPosition maLastValidPosition;
     320             : 
     321             :     /** This flag remebers a selection change between a call to the
     322             :         selection change listener callback and the next
     323             :         <member>DetectChange()</member> method call.
     324             :     */
     325             :     bool mbSelectionHasChanged;
     326             : 
     327             :     /** This flag indicates whether a selection change event is expected due
     328             :         to a programatical change of the selection.
     329             :     */
     330             :     bool mbExpectingSelectionChangeEvent;
     331             : 
     332             :     /** This flag is set to true when the whole document has been
     333             :         processed once 'officially', i.e. a message box has been shown
     334             :         that tells the user so.
     335             :     */
     336             :     bool mbWholeDocumentProcessed;
     337             : 
     338             :     /** When this flag is true then a PrepareSpelling() is executed when
     339             :         StartSearchAndReplace() is called the next time.
     340             :     */
     341             :     bool mbPrepareSpellingPending;
     342             : 
     343             :     /** Initialize the object iterator.  Call this method after being
     344             :         invoked from the search or spellcheck dialog.  It creates a new
     345             :         iterator pointing at the current object when this has not been done
     346             :         before.  It reverses the direction of iteration if the given flag
     347             :         differs from the current direction.
     348             :         @param bDirectionIsForward
     349             :             This flag specifies in which direction to iterator over the
     350             :             objects.  If it differs from the current direction the iterator
     351             :             is reversed.
     352             :     */
     353             :     void Initialize (bool bDirectionIsForward);
     354             : 
     355             :     /** Do search and replace for whole document.
     356             :     */
     357             :     bool SearchAndReplaceAll (void);
     358             : 
     359             :     /** Do search and replace for next match.
     360             :         @return
     361             :             The return value specifies whether the search ended (</sal_True>) or
     362             :             another call to this method is required (</sal_False>).
     363             :     */
     364             :     bool SearchAndReplaceOnce (void);
     365             : 
     366             :     /** Detect changes of the document or view and react accordingly.  Such
     367             :         changes may occur because different calls to
     368             :         <member>SearchAndReplace()</member> there usually is user
     369             :         interaction.  This is at least the press of the search or replace
     370             :         button but may include any other action some of which affect the
     371             :         search.
     372             :     */
     373             :     void DetectChange (void);
     374             : 
     375             :     /** Detect whether the selection has changed.
     376             :         @return
     377             :             Return <TRUE/> when the selection has been changed since the
     378             :             last call to this method.
     379             :     */
     380             :     bool DetectSelectionChange (void);
     381             : 
     382             :     /** Remember the current edited object/caret position/page/view mode
     383             :         when starting to search/spell check so that it can be restored on
     384             :         termination.
     385             :     */
     386             :     void RememberStartPosition (void);
     387             : 
     388             :     /** Restore the position stored in the last call of
     389             :         <member>RememberStartPositiony</member>.
     390             :     */
     391             :     void RestoreStartPosition (void);
     392             : 
     393             :     /** Provide next object to search or spell check as text object in edit
     394             :         mode on the current page.  This skips all objects that do not
     395             :         match or are no text object.
     396             :     */
     397             :     void ProvideNextTextObject (void);
     398             : 
     399             :     /** Handle the situation that the iterator has reached the last object.
     400             :         This may result in setting the <member>mbEndOfSearch</member> flag
     401             :         back to </sal_False>.  This method may show either the end-of-search
     402             :         dialog or the wrap-arround dialog.
     403             :     */
     404             :     void EndOfSearch (void);
     405             : 
     406             :     /** Show a dialog that tells the user that the search has ended either
     407             :         because there are no more matches after finding at least one or that
     408             :         no match has been found at all.
     409             :     */
     410             :     void ShowEndOfSearchDialog (void);
     411             : 
     412             :     /** Show a dialog that asks the user whether to wrap arround to the
     413             :         beginning/end of the document and continue with the search/spell
     414             :         check.
     415             :     */
     416             :     bool ShowWrapArroundDialog (void);
     417             : 
     418             :     /** Check whether the object pointed to by the iterator is a valid text
     419             :         object.
     420             :         @param aPosition
     421             :             The object for which to test whether it is a valid text object.
     422             :     */
     423             :     bool IsValidTextObject (const ::sd::outliner::IteratorPosition& rPosition);
     424             : 
     425             :     /** Put text of current text object into outliner so that the text can
     426             :         be searched/spell checked.
     427             :     */
     428             :     void PutTextIntoOutliner (void);
     429             : 
     430             :     /** Prepare to do spell checking on the current text object.  This
     431             :         includes putting it into edit mode.  Under certain conditions this
     432             :         method sets <member>mbEndOfSearch</member> to <TRUE/>.
     433             :     */
     434             :     void PrepareSpellCheck (void);
     435             : 
     436             :     /** Prepare to search and replace on the current text object.  This
     437             :         includes putting it into edit mode.
     438             :     */
     439             :     void PrepareSearchAndReplace (void);
     440             : 
     441             :     /** Prepare to do a text conversion on the current text
     442             :         object. This includes putting it into edit mode.
     443             :     */
     444             :     void PrepareConversion (void);
     445             : 
     446             :     /** Switch to a new view mode.  Try to restore the original edit mode
     447             :         before doing so.
     448             :         @param ePageKind
     449             :             Specifies the new view mode.
     450             :     */
     451             :     void SetViewMode (PageKind ePageKind);
     452             : 
     453             :     /** Switch to the page or master page specified by the
     454             :         <member>mnPage</member> index.  Master page mode is specified by
     455             :         <member>meEditMode</member>.
     456             :         @param eEditMode
     457             :             The new edit mode.
     458             :         @param nPageIndex
     459             :             The new page index.
     460             :     */
     461             :     void SetPage (EditMode eEditMode, sal_uInt16 nPageIndex);
     462             : 
     463             :     /** Switch on edit mode for the currently selected text object.
     464             :     */
     465             :     void EnterEditMode (sal_Bool bGrabFocus=sal_True);
     466             : 
     467             :     /** Return the position at which a new search is started with respect to
     468             :         the search direction as specified by the argument.
     469             :         @return
     470             :             The position mentioned above in form of a selection with start
     471             :             equals end.
     472             :     */
     473             :     ESelection GetSearchStartPosition (void);
     474             : 
     475             :     /** Detect whether there exists a previous match.  Note that only the
     476             :         absence of such a match can be detected reliably.  An existing match
     477             :         is assumed when the search started not at the beginning/end of the
     478             :         presentation.  This does not have to be true.  The user can have set
     479             :         the cursor at the middle of the text without a prior search.
     480             :         @return
     481             :             Returns </True> when there is no previous match and </False>
     482             :             when there may be one.
     483             :     */
     484             :     bool HasNoPreviousMatch (void);
     485             : 
     486             :     /** Handle a failed search (with or without replace) for the outline
     487             :         mode.  Show message boxes when the search failed completely,
     488             :         i.e. there is no match in the whole presentation, or when no further
     489             :         match exists.
     490             :         @return
     491             :             The returned value indicates whether another (wrapped arround)
     492             :             search shall take place.  If that is so, then it is the caller's
     493             :             responsibility to set the cursor position accordingly.
     494             :     */
     495             :     bool HandleFailedSearch (void);
     496             : 
     497             :     /** Take a position as returned by an object iterator and switch to the
     498             :         view and page on which the object specified by this position is
     499             :         located.
     500             :         @param rPosition
     501             :             This position points to a <type>SdrObject</type> object and
     502             :             contains the view and page where it is located.
     503             :         @return
     504             :             Return a pointer to the <type>SdrObject</type>.
     505             :     */
     506             :     SdrObject* SetObject (const ::sd::outliner::IteratorPosition& rPosition);
     507             : 
     508             :     /** Use this method when the view shell in which to search has changed.
     509             :         It handles i.e. registering at the associated view as selection
     510             :         change listener.
     511             :     */
     512             :     void SetViewShell (const ::boost::shared_ptr<ViewShell>& rpViewShell);
     513             : 
     514             :     /** Activate or deactivate the search in the current selection.  Call
     515             :         this method whenever the selection has changed.  This method creates
     516             :         a copy of the current selection and reassings the object iterator to
     517             :         the current() iterator.
     518             :     */
     519             :     void HandleChangedSelection (void);
     520             : 
     521             :     /** Initiate the spell check of the next relevant text object.
     522             :         When the outline view is active then this method is called
     523             :         after a wrap arround to continue at the beginning of the document.
     524             :         @return
     525             :             Returns <TRUE/> to indicate that another call to this method is
     526             :             required.  When all text objects have been processed then
     527             :             <FALSE/> is returned.
     528             :     */
     529             :     virtual sal_Bool SpellNextDocument (void);
     530             : 
     531             :     /** Show the given message box and make it modal.  It is assumed that
     532             :         the parent of the given dialog is NULL, i.e. the application
     533             :         window.  This function makes sure that the otherwise non-modal
     534             :         search dialog, if visible, is locked, too.
     535             :     */
     536             :     sal_uInt16 ShowModalMessageBox (Dialog& rMessageBox);
     537             : };
     538             : 
     539             : } // end of namespace sd
     540             : 
     541             : #endif
     542             : 
     543             : /* vim:set shiftwidth=4 softtabstop=4 expandtab: */

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