scintilla/src/EditModel.cxx

   1 // Scintilla source code edit control
   2 /** @file EditModel.cxx
   3  ** Defines the editor state that must be visible to EditorView.
   4  **/
   5 // Copyright 1998-2014 by Neil Hodgson <neilh@scintilla.org>
   6 // The License.txt file describes the conditions under which this software may be distributed.
   7
   8 #include <cstddef>
   9 #include <cstdlib>
  10 #include <cstdint>
  11 #include <cassert>
  12 #include <cstring>
  13 #include <cmath>
  14
  15 #include <stdexcept>
  16 #include <string>
  17 #include <string_view>
  18 #include <vector>
  19 #include <map>
  20 #include <set>
  21 #include <optional>
  22 #include <algorithm>
  23 #include <memory>
  24
  25 #include "ScintillaTypes.h"
  26 #include "ILoader.h"
  27 #include "ILexer.h"
  28
  29 #include "Debugging.h"
  30 #include "Geometry.h"
  31 #include "Platform.h"
  32
  33 #include "CharacterCategoryMap.h"
  34
  35 #include "Position.h"
  36 #include "UniqueString.h"
  37 #include "SplitVector.h"
  38 #include "Partitioning.h"
  39 #include "RunStyles.h"
  40 #include "ContractionState.h"
  41 #include "CellBuffer.h"
  42 #include "Indicator.h"
  43 #include "LineMarker.h"
  44 #include "Style.h"
  45 #include "ViewStyle.h"
  46 #include "CharClassify.h"
  47 #include "Decoration.h"
  48 #include "CaseFolder.h"
  49 #include "Document.h"
  50 #include "UniConversion.h"
  51 #include "Selection.h"
  52 #include "PositionCache.h"
  53 #include "EditModel.h"
  54
  55 using namespace Scintilla;
  56 using namespace Scintilla::Internal;
  57
  58 Caret::Caret() noexcept :
  59         active(false), on(false), period(500) {}
  60
  61 EditModel::EditModel() : braces{} {
  62         inOverstrike = false;
  63         xOffset = 0;
  64         trackLineWidth = false;
  65         posDrag = SelectionPosition(Sci::invalidPosition);
  66         braces[0] = Sci::invalidPosition;
  67         braces[1] = Sci::invalidPosition;
  68         bracesMatchStyle = StyleBraceBad;
  69         highlightGuideColumn = 0;
  70         hasFocus = false;
  71         primarySelection = true;
  72         imeInteraction = IMEInteraction::Windowed;
  73         bidirectional = Bidirectional::Disabled;
  74         foldFlags = FoldFlag::None;
  75         foldDisplayTextStyle = FoldDisplayTextStyle::Hidden;
  76         hotspot = Range(Sci::invalidPosition);
  77         hotspotSingleLine = true;
  78         hoverIndicatorPos = Sci::invalidPosition;
  79         wrapWidth = LineLayout::wrapWidthInfinite;
  80         pdoc = new Document(DocumentOption::Default);
  81         pdoc->AddRef();
  82         pcs = ContractionStateCreate(pdoc->IsLarge());
  83 }
  84
  85 EditModel::~EditModel() {
  86         try {
  87                 // This never throws but isn't marked noexcept for compatibility
  88                 pdoc->Release();
  89         } catch (...) {
  90                 // Ignore any exception
  91         }
  92         pdoc = nullptr;
  93 }
  94
  95 bool EditModel::BidirectionalEnabled() const noexcept {
  96         return (bidirectional != Bidirectional::Disabled) &&
  97                 (CpUtf8 == pdoc->dbcsCodePage);
  98 }
  99
 100 bool EditModel::BidirectionalR2L() const noexcept {
 101         return bidirectional == Bidirectional::R2L;
 102 }
 103
 104 SurfaceMode EditModel::CurrentSurfaceMode() const noexcept {
 105         return SurfaceMode(pdoc->dbcsCodePage, BidirectionalR2L());
 106 }
 107
 108 void EditModel::SetDefaultFoldDisplayText(const char *text) {
 109         defaultFoldDisplayText = IsNullOrEmpty(text) ? UniqueString() : UniqueStringCopy(text);
 110 }
 111
 112 const char *EditModel::GetDefaultFoldDisplayText() const noexcept {
 113         return defaultFoldDisplayText.get();
 114 }
 115
 116 const char *EditModel::GetFoldDisplayText(Sci::Line lineDoc) const noexcept {
 117         if (foldDisplayTextStyle == FoldDisplayTextStyle::Hidden || pcs->GetExpanded(lineDoc)) {
 118                 return nullptr;
 119         }
 120
 121         const char *text = pcs->GetFoldDisplayText(lineDoc);
 122         return text ? text : defaultFoldDisplayText.get();
 123 }
 124
 125 InSelection EditModel::LineEndInSelection(Sci::Line lineDoc) const {
 126         const Sci::Position posAfterLineEnd = pdoc->LineStart(lineDoc + 1);
 127         return sel.InSelectionForEOL(posAfterLineEnd);
 128 }
 129
 130 int EditModel::GetMark(Sci::Line line) const {
 131         return pdoc->GetMark(line, FlagSet(changeHistoryOption, ChangeHistoryOption::Markers));
 132 }