scintilla/src/ContractionState.h

   1 // Scintilla source code edit control
   2 /** @file ContractionState.h
   3  ** Manages visibility of lines for folding and wrapping.
   4  **/
   5 // Copyright 1998-2007 by Neil Hodgson <neilh@scintilla.org>
   6 // The License.txt file describes the conditions under which this software may be distributed.
   7
   8 #ifndef CONTRACTIONSTATE_H
   9 #define CONTRACTIONSTATE_H
  10
  11 #ifdef SCI_NAMESPACE
  12 namespace Scintilla {
  13 #endif
  14
  15 /**
  16  */
  17 class ContractionState {
  18         // These contain 1 element for every document line.
  19         RunStyles *visible;
  20         RunStyles *expanded;
  21         RunStyles *heights;
  22         Partitioning *displayLines;
  23         int linesInDocument;
  24
  25         void EnsureData();
  26
  27         bool OneToOne() const {
  28                 // True when each document line is exactly one display line so need for
  29                 // complex data structures.
  30                 return visible == 0;
  31         }
  32
  33 public:
  34         ContractionState();
  35         virtual ~ContractionState();
  36
  37         void Clear();
  38
  39         int LinesInDoc() const;
  40         int LinesDisplayed() const;
  41         int DisplayFromDoc(int lineDoc) const;
  42         int DisplayLastFromDoc(int lineDoc) const;
  43         int DocFromDisplay(int lineDisplay) const;
  44
  45         void InsertLine(int lineDoc);
  46         void InsertLines(int lineDoc, int lineCount);
  47         void DeleteLine(int lineDoc);
  48         void DeleteLines(int lineDoc, int lineCount);
  49
  50         bool GetVisible(int lineDoc) const;
  51         bool SetVisible(int lineDocStart, int lineDocEnd, bool isVisible);
  52         bool HiddenLines() const;
  53
  54         bool GetExpanded(int lineDoc) const;
  55         bool SetExpanded(int lineDoc, bool isExpanded);
  56         int ContractedNext(int lineDocStart) const;
  57
  58         int GetHeight(int lineDoc) const;
  59         bool SetHeight(int lineDoc, int height);
  60
  61         void ShowAll();
  62         void Check() const;
  63 };
  64
  65 #ifdef SCI_NAMESPACE
  66 }
  67 #endif
  68
  69 #endif