Merge pull request #1 from saurabhb17/develop

Secondary files

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diff --git a/eeschema/sch_sheet_path.h b/eeschema/sch_sheet_path.h
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+/*
+ * This program source code file is part of KiCad, a free EDA CAD application.
+ *
+ * Copyright (C) 2009 Jean-Pierre Charras, jaen-pierre.charras@gipsa-lab.inpg.com
+ * Copyright (C) 2011 Wayne Stambaugh <stambaughw@verizon.net>
+ * Copyright (C) 1992-2011 KiCad Developers, see AUTHORS.txt for contributors.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, you may find one here:
+ * http://www.gnu.org/licenses/old-licenses/gpl-2.0.html
+ * or you may search the http://www.gnu.org website for the version 2 license,
+ * or you may write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA
+ */
+
+/**
+ * @file sch_sheet_path.h
+ * @brief Definition of the SCH_SHEET_PATH and SCH_SHEET_LIST classes for Eeschema.
+ */
+
+#ifndef CLASS_DRAWSHEET_PATH_H
+#define CLASS_DRAWSHEET_PATH_H
+
+#include <base_struct.h>
+
+
+/** Info about complex hierarchies handling:
+ * A hierarchical schematic uses sheets (hierarchical sheets) included in a
+ * given sheet.  Each sheet corresponds to a schematic drawing handled by a
+ * SCH_SCREEN structure.  A SCH_SCREEN structure contains drawings, and have
+ * a filename to write it's data.  Also a SCH_SCREEN display a sheet number
+ * and the name of the sheet.
+ *
+ * In simple (and flat) hierarchies a sheet is linked to a SCH_SCREEN,
+ * and a SCH_SCREEN is used by only one hierarchical sheet.
+ *
+ * In complex hierarchies the same SCH_SCREEN (and its data) is shared between
+ * more than one sheet.  Therefore subsheets (like subsheets in a SCH_SCREEN
+ * shared by many sheets) can be also shared.  So the same SCH_SCREEN must
+ * handle different components references and parts selection depending on
+ * which sheet is currently selected, and how a given subsheet is selected.
+ * 2 sheets share the same SCH_SCREEN (the same drawings) if they have the
+ * same filename.
+ *
+ * In KiCad each component and sheet receives (when created) an unique
+ * identification called Time Stamp.  So each sheet has 2 ids: its time stamp
+ * (that cannot change) and its name ( that can be edited and therefore is
+ * not reliable for strong identification).  KiCad uses Time Stamp ( a unique
+ * 32 bit id), to identify sheets in hierarchies.
+ * A given sheet in a hierarchy is fully labeled by its path (or sheet path)
+ * that is the list of time stamp found to access it through the hierarchy
+ * the root sheet is /.  All  other sheets have a path like /1234ABCD or
+ * /4567FEDC/AA2233DD/.  This path can be displayed as human readable sheet
+ * name like: / or /sheet1/include_sheet/ or /sheet2/include_sheet/
+ *
+ * So to know for a given SCH_SCREEN (a given schematic drawings) we must:
+ *   1) Handle all references possibilities.
+ *   2) When acceded by a given selected sheet, display (update) the
+ *      corresponding references and sheet path
+ *
+ * The class SCH_SHEET_PATH handles paths used to access a sheet.  The class
+ * SCH_SHEET_LIST allows to handle the full (or partial) list of sheets and
+ * their paths in a complex hierarchy.  The class EDA_ScreenList allow to
+ * handle the list of SCH_SCREEN. It is useful to clear or save data,
+ * but is not suitable to handle the full complex hierarchy possibilities
+ * (usable in flat and simple hierarchies).
+ */
+
+
+class wxFindReplaceData;
+class SCH_SCREEN;
+class SCH_MARKER;
+class SCH_SHEET;
+class SCH_ITEM;
+class SCH_REFERENCE_LIST;
+class PART_LIBS;
+
+#define SHEET_NOT_FOUND          -1
+
+
+/**
+ * Type SCH_MULTI_UNIT_REFERENCE_MAP
+ * is used to create a map of reference designators for multi-unit parts.
+ */
+typedef std::map<wxString, SCH_REFERENCE_LIST> SCH_MULTI_UNIT_REFERENCE_MAP;
+
+/**
+ * Class SCH_SHEET_PATH
+ * handles access to a sheet by way of a path.
+ * <p>
+ * The member m_sheets stores the list of sheets from the first (usually
+ * g_RootSheet) to a given sheet in last position.
+ * The _last_ sheet is usually the sheet we want to select or reach (which is
+ * what the function Last() returns).
+ * Others sheets constitute the "path" from the first to the last sheet.
+ * </p>
+ */
+class SCH_SHEET_PATH
+{
+#define DSLSZ 32          // Max number of levels for a sheet path
+
+    SCH_SHEET* m_sheets[ DSLSZ ];
+    unsigned   m_numSheets;
+
+public:
+    SCH_SHEET_PATH();
+
+    void Clear()
+    {
+        m_numSheets = 0;
+    }
+
+    unsigned GetCount()
+    {
+        return m_numSheets;
+    }
+
+    SCH_SHEET* GetSheet( unsigned index )
+    {
+        if( index < m_numSheets )
+            return m_sheets[index];
+
+        return NULL;
+    }
+
+    /**
+     * Function Cmp
+     * Compare if this is the same sheet path as aSheetPathToTest
+     * @param aSheetPathToTest = sheet path to compare
+     * @return 1 if this sheet path has more sheets than aSheetPathToTest, 
+     *   -1 if this sheet path has fewer sheets than aSheetPathToTest, 
+     *   or 0 if same
+     */
+    int Cmp( const SCH_SHEET_PATH& aSheetPathToTest ) const;
+
+    /**
+     * Function Last
+     * returns a pointer to the last sheet of the list
+     * One can see the others sheet as the "path" to reach this last sheet
+     */
+    SCH_SHEET* Last() const;
+
+    /**
+     * Function LastScreen
+     * @return the SCH_SCREEN relative to the last sheet in list
+     */
+    SCH_SCREEN* LastScreen() const;
+
+    /**
+     * Function LastDrawList
+     * @return a pointer to the first schematic item handled by the
+     * SCH_SCREEN relative to the last sheet in list
+     */
+    SCH_ITEM* LastDrawList() const;
+
+    /**
+     * Get the last schematic item relative to the first sheet in the list.
+     *
+     * @return Last schematic item relative to the first sheet in the list if list
+     *         is not empty.  Otherwise NULL.
+     */
+    SCH_ITEM* FirstDrawList() const;
+
+    /**
+     * Function Push
+     * store (push) aSheet in list
+     * @param aSheet = pointer to the SCH_SHEET to store in list
+     * Push is used when entered a sheet to select or analyze it
+     * This is like cd &ltdirectory&gt in directories navigation
+     */
+    void Push( SCH_SHEET* aSheet );
+
+    /**
+     * Function Pop
+     * retrieves (pop) the last entered sheet and remove it from list
+     * @return a SCH_SHEET* pointer to the removed sheet in list
+     * Pop is used when leaving a sheet after a selection or analyze
+     * This is like cd .. in directories navigation
+     */
+    SCH_SHEET* Pop();
+
+    /**
+     * Function Path
+     * the path uses the time stamps which do not changes even when editing
+     * sheet parameters
+     * a path is something like / (root) or /34005677 or /34005677/00AE4523
+     */
+    wxString Path() const;
+
+    /**
+     * Function PathHumanReadable
+     * returns the sheet path in a human readable form, i.e. as a path made
+     * from sheet names.  The the "normal" path instead uses the time
+     * stamps in the path.  (Time stamps do not change even when editing
+     * sheet parameters).
+     */
+    wxString PathHumanReadable() const;
+
+    /**
+     * Function BuildSheetPathInfoFromSheetPathValue
+     * Fill this with data to access to the hierarchical sheet known by its path \a aPath
+     * @param aPath = path of the sheet to reach (in non human readable format)
+     * @param aFound - Please document me.
+     * @return true if success else false
+     */
+    bool BuildSheetPathInfoFromSheetPathValue( const wxString& aPath, bool aFound = false );
+
+    /**
+     * Function UpdateAllScreenReferences
+     * updates the reference and the m_Multi parameter (part selection) for all
+     * components on a screen depending on the actual sheet path.
+     * Mandatory in complex hierarchies because sheets use the same screen
+     * (basic schematic)
+     * but with different references and part selections according to the
+     * displayed sheet
+     */
+    void UpdateAllScreenReferences();
+
+    /**
+     * Function AnnotatePowerSymbols
+     * annotates the power symbols only starting at \a aReference in the sheet path.
+     * @param aLibs the library list to use
+     * @param aReference A pointer to the number for the reference designator of the
+     *                   first power symbol to be annotated.  If the pointer is NULL
+     *                   the annotation starts at 1.  The number is incremented for
+     *                   each power symbol annotated.
+     */
+    void AnnotatePowerSymbols( PART_LIBS* aLibs, int* aReference );
+
+    /**
+     * Function GetComponents
+     * adds a SCH_REFERENCE() object to \a aReferences for each component in the sheet.
+     * @param aLibs the library list to use
+     * @param aReferences List of references to populate.
+     * @param aIncludePowerSymbols : false to only get normal components.
+     */
+    void GetComponents( PART_LIBS* aLibs, SCH_REFERENCE_LIST& aReferences,
+                        bool aIncludePowerSymbols = true  );
+
+    /**
+     * Function GetMultiUnitComponents
+     * adds a SCH_REFERENCE_LIST object to \a aRefList for each same-reference set of
+     * multi-unit parts in the sheet. The map key for each element will be the
+     * reference designator.
+     * @param aLibs the library list to use
+     * @param aRefList Map of reference designators to reference lists
+     * @param aIncludePowerSymbols : false to only get normal components.
+     */
+    void GetMultiUnitComponents( PART_LIBS* aLibs, SCH_MULTI_UNIT_REFERENCE_MAP &aRefList,
+                                 bool aIncludePowerSymbols = true );
+
+    /**
+     * Function SetFootprintField
+     * searches last sheet in the path for a component with \a aReference and set the footprint
+     * field to \a aFootPrint if found.
+     *
+     * @param aReference The reference designator of the component.
+     * @param aFootPrint The value to set the footprint field.
+     * @param aSetVisible The value to set the field visibility flag.
+     * @return True if \a aReference was found otherwise false.
+     */
+    bool SetComponentFootprint( const wxString& aReference, const wxString& aFootPrint,
+                                bool aSetVisible );
+
+    /**
+     * Find the next schematic item in this sheet object.
+     *
+     * @param aType - The type of schematic item object to search for.
+     * @param aLastItem - Start search from aLastItem.  If no aLastItem, search from
+     *                    the beginning of the list.
+     * @param aWrap - Wrap around the end of the list to find the next item if aLastItem
+     *                is defined.
+     * @return - The next schematic item if found.  Otherwise, NULL is returned.
+     */
+    SCH_ITEM* FindNextItem( KICAD_T aType, SCH_ITEM* aLastItem = NULL, bool aWrap = false ) const;
+
+    /**
+     * Find the previous schematic item in this sheet path object.
+     *
+     * @param aType - The type of schematic item object to search for.
+     * @param aLastItem - Start search from aLastItem.  If no aLastItem, search from
+     *                    the end of the list.
+     * @param aWrap - Wrap around the beginning of the list to find the next item if aLastItem
+     *                is defined.
+     * @return - The previous schematic item if found.  Otherwise, NULL is returned.
+     */
+    SCH_ITEM* FindPreviousItem( KICAD_T aType, SCH_ITEM* aLastItem = NULL, bool aWrap = false ) const;
+
+    /**
+     * Function TestForRecursion
+     *
+     * test the SCH_SHEET_PATH file names to check adding the sheet stored in the file
+     * \a aSrcFileName to the sheet stored in file \a aDestFileName  will cause a sheet
+     * path recursion.
+     *
+     * @param aSrcFileName is the source file name of the sheet add to \a aDestFileName.
+     * @param aDestFileName is the file name of the destination sheet for \a aSrcFileName.
+     * @return true if \a aFileName will cause recursion in the sheet path.  Otherwise false.
+     */
+    bool TestForRecursion( const wxString& aSrcFileName, const wxString& aDestFileName ) const;
+
+    int FindSheet( const wxString& aFileName ) const;
+
+    /**
+     * Function FindSheetByName
+     *
+     * searches the #SCH_SHEET_PATH for a sheet named \a aSheetName.
+     *
+     * @param aSheetName is the name of the sheet to find.
+     * @return a pointer to the sheet named \a aSheetName if found or NULL if not found.
+     */
+    SCH_SHEET* FindSheetByName( const wxString& aSheetName );
+
+    SCH_SHEET_PATH& operator=( const SCH_SHEET_PATH& d1 );
+
+    bool operator==( const SCH_SHEET_PATH& d1 ) const;
+
+    bool operator!=( const SCH_SHEET_PATH& d1 ) const { return !( *this == d1 ) ; }
+};
+
+
+/**
+ * Class SCH_SHEET_LIST
+ * handles the list of Sheets in a hierarchy.
+ * Sheets are not unique, there can be many sheets with the same
+ * filename and the same SCH_SCREEN reference.
+ * The schematic (SCH_SCREEN) is shared between these sheets,
+ * and component references are specific to a sheet path.
+ * When a sheet is entered, component references and sheet number are updated.
+ */
+class SCH_SHEET_LIST
+{
+private:
+    SCH_SHEET_PATH* m_list;
+    int             m_count;     /* Number of sheets included in hierarchy,
+                                  * starting at the given sheet in constructor .
+                                  * the given sheet is counted
+                                 */
+    int             m_index;     /* internal variable to handle GetNext(): cleared by
+                                  * GetFirst() and incremented by GetNext() after
+                                  * returning the next item in m_list.  Also used for
+                                  * internal calculations in BuildSheetList()
+                                  */
+    bool            m_isRootSheet;
+    SCH_SHEET_PATH  m_currList;
+
+public:
+
+    /**
+     * Constructor
+     * builds the list of sheets from aSheet.
+     * If aSheet == NULL (default) build the whole list of sheets in hierarchy.
+     * So usually call it with no parameter.
+     */
+    SCH_SHEET_LIST( SCH_SHEET* aSheet = NULL );
+
+    ~SCH_SHEET_LIST()
+    {
+        if( m_list )
+            delete[] m_list;
+
+        m_list = NULL;
+    }
+
+    /**
+     * Function GetCount
+     * @return the number of sheets in list:
+     * usually the number of sheets found in the whole hierarchy
+     */
+    int GetCount() const { return m_count; }
+
+    /**
+     * Function GetIndex
+     * @return the last selected screen index.
+     */
+    int GetIndex() const { return m_index; }
+
+    /**
+     * Function GetFirst
+     * @return the first item (sheet) in m_list and prepare calls to GetNext()
+     */
+    SCH_SHEET_PATH* GetFirst();
+
+    /**
+     * Function GetNext
+     * @return the next item (sheet) in m_list or NULL if no more item in
+     * sheet list
+     */
+    SCH_SHEET_PATH* GetNext();
+
+    /**
+     * Function GetLast
+     * returns the last sheet in the sheet list.
+     *
+     * @return Last sheet in the list or NULL if sheet list is empty.
+     */
+    SCH_SHEET_PATH* GetLast();
+
+    /**
+     * Function GetPrevious
+     * returns the previous sheet in the sheet list.
+     *
+     * @return The previous sheet in the sheet list or NULL if already at the
+     *         beginning of the list.
+     */
+    SCH_SHEET_PATH* GetPrevious();
+
+    /**
+     * Function GetSheet
+     *
+     * @param aIndex A index in sheet list to get the sheet.
+     * @return the sheet at \a aIndex position in m_list or NULL if \a aIndex is
+     *         outside the bounds of the index list.
+     */
+    SCH_SHEET_PATH* GetSheet( int aIndex ) const;
+
+    /**
+     * Function GetSheetByPath
+     * returns a sheet matching the path name in \a aPath.
+     *
+     * @param aPath A wxString object containing path of the sheet to get.
+     * @param aHumanReadable True uses the human readable path for comparison.
+     *                       False uses the timestamp generated path.
+     * @return The sheet that matches \a aPath or NULL if no sheet matching
+     *         \a aPath is found.
+     */
+    SCH_SHEET_PATH* GetSheetByPath( const wxString aPath, bool aHumanReadable = true );
+
+    /**
+     * Function IsModified
+     * checks the entire hierarchy for any modifications.
+     * @returns True if the hierarchy is modified otherwise false.
+     */
+    bool IsModified();
+
+    /**
+     * Function IsAutoSaveRequired
+     * checks the entire hierarchy for any modifications that require auto save.
+     * @return True if the hierarchy is modified otherwise false.
+     */
+    bool IsAutoSaveRequired();
+
+    void ClearModifyStatus();
+
+    /**
+     * Function AnnotatePowerSymbols
+     * clear and annotates the entire hierarchy of the sheet path list.
+     * @param aLib the library list to use
+     */
+    void AnnotatePowerSymbols( PART_LIBS* aLib );
+
+    /**
+     * Function GetComponents
+     * adds a SCH_REFERENCE() object to \a aReferences for each component in the list
+     * of sheets.
+     * @param aLibs the library list to use
+     * @param aReferences List of references to populate.
+     * @param aIncludePowerSymbols Set to false to only get normal components.
+     */
+    void GetComponents( PART_LIBS* aLibs, SCH_REFERENCE_LIST& aReferences, bool aIncludePowerSymbols = true  );
+
+    /**
+     * Function GetMultiUnitComponents
+     * adds a SCH_REFERENCE_LIST object to \a aRefList for each same-reference set of
+     * multi-unit parts in the list of sheets. The map key for each element will be the
+     * reference designator.
+     * @param aLibs the library list to use
+     * @param aRefList Map of reference designators to reference lists
+     * @param aIncludePowerSymbols Set to false to only get normal components.
+     */
+    void GetMultiUnitComponents( PART_LIBS* aLibs, SCH_MULTI_UNIT_REFERENCE_MAP &aRefList,
+            bool aIncludePowerSymbols = true );
+
+    /**
+     * Function FindNextItem
+     * searches the entire schematic for the next schematic object.
+     *
+     * @param aType - The type of schematic item to find.
+     * @param aSheetFound - The sheet the item was found in.  NULL if the next item
+     *                      is not found.
+     * @param aLastItem - Find next item after aLastItem if not NULL.
+     * @param aWrap - Wrap past around the end of the list of sheets.
+     * @return If found, Returns the next schematic item.  Otherwise, returns NULL.
+     */
+    SCH_ITEM* FindNextItem( KICAD_T aType, SCH_SHEET_PATH** aSheetFound = NULL,
+                            SCH_ITEM* aLastItem = NULL, bool aWrap = true );
+
+    /**
+     * Function FindPreviousItem
+     * searches the entire schematic for the previous schematic item.
+     *
+     * @param aType - The type of schematic item to find.
+     * @param aSheetFound - The sheet the item was found in.  NULL if the previous item
+     *                      is not found.
+     * @param aLastItem - Find the previous item before aLastItem if not NULL.
+     * @param aWrap - Wrap past around the beginning of the list of sheets.
+     * @return If found, the previous schematic item.  Otherwise, NULL.
+     */
+    SCH_ITEM* FindPreviousItem( KICAD_T aType, SCH_SHEET_PATH** aSheetFound = NULL,
+                                SCH_ITEM* aLastItem = NULL, bool aWrap = true );
+
+    /**
+     * Function SetFootprintField
+     * searches all the sheets for a component with \a aReference and set the footprint
+     * field to \a aFootPrint if found.
+     *
+     * @param aReference The reference designator of the component.
+     * @param aFootPrint The value to set the footprint field.
+     * @param aSetVisible The value to set the field visibility flag.
+     * @return True if \a aReference was found otherwise false.
+     */
+    bool SetComponentFootprint( const wxString& aReference, const wxString& aFootPrint,
+                                bool aSetVisible );
+
+    /**
+     * Function IsComplexHierarchy
+     * searches all of the sheets for duplicate files names which indicates a complex
+     * hierarchy.
+     *
+     * @return true if the #SCH_SHEET_LIST is a complex hierarchy.
+     */
+    bool IsComplexHierarchy() const;
+
+    /**
+     * Function TestForRecursion
+     *
+     * test every SCH_SHEET_PATH in the SCH_SHEET_LIST to verify if adding the sheets stored
+     * in \a aSrcSheetHierarchy to the sheet stored in \a aDestFileName  will cause recursion.
+     *
+     * @param aSrcSheetHierarchy is the SCH_SHEET_LIST of the source sheet add to \a aDestFileName.
+     * @param aDestFileName is the file name of the destination sheet for \a aSrcFileName.
+     * @return true if \a aFileName will cause recursion in the sheet path.  Otherwise false.
+     */
+    bool TestForRecursion( const SCH_SHEET_LIST& aSrcSheetHierarchy,
+                           const wxString& aDestFileName ) const;
+
+    /**
+     * Function FindSheetByName
+     *
+     * searches the entire #SCH_SHEET_LIST for a sheet named \a aSheetName.
+     *
+     * @param aSheetName is the name of the sheet to find.
+     * @return a pointer to the sheet named \a aSheetName if found or NULL if not found.
+     */
+    SCH_SHEET* FindSheetByName( const wxString& aSheetName );
+
+private:
+
+    /**
+     * Function BuildSheetList
+     * builds the list of sheets and their sheet path from \a aSheet.
+     * If \a aSheet is the root sheet, the full sheet path and sheet list are built.
+     *
+     * @param aSheet is the starting sheet from which the list is built, or NULL
+     *               indicating that g_RootSheet should be used.
+     * @throw std::bad_alloc if the memory for the sheet path list could not be allocated.
+     */
+    void BuildSheetList( SCH_SHEET* aSheet );
+};
+
+#endif // CLASS_DRAWSHEET_PATH_H