src/apps/haikudepot/textview/TextDocument.h

   1 /*
   2  * Copyright 2013-2014, Stephan Aßmus <superstippi@gmx.de>.
   3  * All rights reserved. Distributed under the terms of the MIT License.
   4  */
   5 #ifndef TEXT_DOCUMENT_H
   6 #define TEXT_DOCUMENT_H
   7
   8 #include <Referenceable.h>
   9
  10 #include "CharacterStyle.h"
  11 #include "List.h"
  12 #include "Paragraph.h"
  13 #include "TextListener.h"
  14 #include "UndoableEditListener.h"
  15
  16
  17 typedef List<Paragraph, false>                                  ParagraphList;
  18 typedef List<TextListenerRef, false>                    TextListenerList;
  19 typedef List<UndoableEditListenerRef, false>    UndoListenerList;
  20
  21 class TextDocument;
  22 typedef BReference<TextDocument> TextDocumentRef;
  23
  24
  25 class TextDocument : public BReferenceable {
  26 public:
  27                                                                 TextDocument();
  28                                                                 TextDocument(
  29                                                                         CharacterStyle characterStyle,
  30                                                                         ParagraphStyle paragraphStyle);
  31                                                                 TextDocument(const TextDocument& other);
  32
  33                         TextDocument&           operator=(const TextDocument& other);
  34                         bool                            operator==(const TextDocument& other) const;
  35                         bool                            operator!=(const TextDocument& other) const;
  36
  37                         // Text insertion and removing
  38                         status_t                        Insert(int32 textOffset, const BString& text);
  39                         status_t                        Insert(int32 textOffset, const BString& text,
  40                                                                         CharacterStyle style);
  41                         status_t                        Insert(int32 textOffset, const BString& text,
  42                                                                         CharacterStyle characterStyle,
  43                                                                         ParagraphStyle paragraphStyle);
  44
  45                         status_t                        Remove(int32 textOffset, int32 length);
  46
  47                         status_t                        Replace(int32 textOffset, int32 length,
  48                                                                         const BString& text);
  49                         status_t                        Replace(int32 textOffset, int32 length,
  50                                                                         const BString& text,
  51                                                                         CharacterStyle style);
  52                         status_t                        Replace(int32 textOffset, int32 length,
  53                                                                         const BString& text,
  54                                                                         CharacterStyle characterStyle,
  55                                                                         ParagraphStyle paragraphStyle);
  56                         status_t                        Replace(int32 textOffset, int32 length,
  57                                                                         TextDocumentRef document);
  58
  59                         // Style access
  60                         const CharacterStyle& CharacterStyleAt(int32 textOffset) const;
  61                         const ParagraphStyle& ParagraphStyleAt(int32 textOffset) const;
  62
  63                         // Paragraph access
  64                         const ParagraphList& Paragraphs() const
  65                                                                         { return fParagraphs; }
  66
  67                         int32                           CountParagraphs() const;
  68
  69                         int32                           ParagraphIndexFor(int32 textOffset,
  70                                                                         int32& paragraphOffset) const;
  71
  72                         const Paragraph&        ParagraphAt(int32 textOffset,
  73                                                                         int32& paragraphOffset) const;
  74
  75                         const Paragraph&        ParagraphAt(int32 index) const;
  76
  77                         bool                            Append(const Paragraph& paragraph);
  78
  79                         // Query information
  80                         int32                           Length() const;
  81
  82                         BString                         Text() const;
  83                         BString                         Text(int32 textOffset, int32 length) const;
  84                         TextDocumentRef         SubDocument(int32 textOffset,
  85                                                                         int32 length) const;
  86
  87                         void                            PrintToStream() const;
  88
  89                         // Support
  90         static  TextDocumentRef         NormalizeText(const BString& text,
  91                                                                         CharacterStyle characterStyle,
  92                                                                         ParagraphStyle paragraphStyle);
  93
  94                         // Listener support
  95                         bool                            AddListener(TextListenerRef listener);
  96                         bool                            RemoveListener(TextListenerRef listener);
  97                         bool                            AddUndoListener(
  98                                                                         UndoableEditListenerRef listener);
  99                         bool                            RemoveUndoListener(
 100                                                                         UndoableEditListenerRef listener);
 101
 102 private:
 103                         status_t                        _Insert(int32 textOffset,
 104                                                                         TextDocumentRef document,
 105                                                                         int32& firstParagraph,
 106                                                                         int32& paragraphCount);
 107                         status_t                        _Remove(int32 textOffset, int32 length,
 108                                                                         int32& firstParagraph,
 109                                                                         int32& paragraphCount);
 110
 111 private:
 112                         void                            _NotifyTextChanging(
 113                                                                         TextChangingEvent& event) const;
 114                         void                            _NotifyTextChanged(
 115                                                                         const TextChangedEvent& event) const;
 116                         void                            _NotifyUndoableEditHappened(
 117                                                                         const UndoableEditRef& edit) const;
 118
 119 private:
 120                         ParagraphList           fParagraphs;
 121                         Paragraph                       fEmptyLastParagraph;
 122                         CharacterStyle          fDefaultCharacterStyle;
 123
 124                         TextListenerList        fTextListeners;
 125                         UndoListenerList        fUndoListeners;
 126 };
 127
 128
 129 #endif // TEXT_DOCUMENT_H