ext/scintilla/src/Decoration.cxx

   1 /** @file Decoration.cxx
   2  ** Visual elements added over text.
   3  **/
   4 // Copyright 1998-2007 by Neil Hodgson <neilh@scintilla.org>
   5 // The License.txt file describes the conditions under which this software may be distributed.
   6
   7 #include <stdio.h>
   8 #include <string.h>
   9 #include <stdlib.h>
  10 #include <stdarg.h>
  11
  12 #include "Platform.h"
  13
  14 #include "Scintilla.h"
  15 #include "SplitVector.h"
  16 #include "Partitioning.h"
  17 #include "RunStyles.h"
  18 #include "Decoration.h"
  19
  20 #ifdef SCI_NAMESPACE
  21 using namespace Scintilla;
  22 #endif
  23
  24 Decoration::Decoration(int indicator_) : next(0), indicator(indicator_) {
  25 }
  26
  27 Decoration::~Decoration() {
  28 }
  29
  30 bool Decoration::Empty() {
  31         return rs.Runs() == 1;
  32 }
  33
  34 DecorationList::DecorationList() : currentIndicator(0), currentValue(1), current(0),
  35         lengthDocument(0), root(0), clickNotified(false) {
  36 }
  37
  38 DecorationList::~DecorationList() {
  39         Decoration *deco = root;
  40         while (deco) {
  41                 Decoration *decoNext = deco->next;
  42                 delete deco;
  43                 deco = decoNext;
  44         }
  45         root = 0;
  46         current = 0;
  47 }
  48
  49 Decoration *DecorationList::DecorationFromIndicator(int indicator) {
  50         for (Decoration *deco=root; deco; deco = deco->next) {
  51                 if (deco->indicator == indicator) {
  52                         return deco;
  53                 }
  54         }
  55         return 0;
  56 }
  57
  58 Decoration *DecorationList::Create(int indicator, int length) {
  59         currentIndicator = indicator;
  60         Decoration *decoNew = new Decoration(indicator);
  61         decoNew->rs.InsertSpace(0, length);
  62
  63         Decoration *decoPrev = 0;
  64         Decoration *deco = root;
  65
  66         while (deco && (deco->indicator < indicator)) {
  67                 decoPrev = deco;
  68                 deco = deco->next;
  69         }
  70         if (decoPrev == 0) {
  71                 decoNew->next = root;
  72                 root = decoNew;
  73         } else {
  74                 decoNew->next = deco;
  75                 decoPrev->next = decoNew;
  76         }
  77         return decoNew;
  78 }
  79
  80 void DecorationList::Delete(int indicator) {
  81         Decoration *decoToDelete = 0;
  82         if (root) {
  83                 if (root->indicator == indicator) {
  84                         decoToDelete = root;
  85                         root = root->next;
  86                 } else {
  87                         Decoration *deco=root;
  88                         while (deco->next && !decoToDelete) {
  89                                 if (deco->next && deco->next->indicator == indicator) {
  90                                         decoToDelete = deco->next;
  91                                         deco->next = decoToDelete->next;
  92                                 } else {
  93                                         deco = deco->next;
  94                                 }
  95                         }
  96                 }
  97         }
  98         if (decoToDelete) {
  99                 delete decoToDelete;
 100                 current = 0;
 101         }
 102 }
 103
 104 void DecorationList::SetCurrentIndicator(int indicator) {
 105         currentIndicator = indicator;
 106         current = DecorationFromIndicator(indicator);
 107         currentValue = 1;
 108 }
 109
 110 void DecorationList::SetCurrentValue(int value) {
 111         currentValue = value ? value : 1;
 112 }
 113
 114 bool DecorationList::FillRange(int &position, int value, int &fillLength) {
 115         if (!current) {
 116                 current = DecorationFromIndicator(currentIndicator);
 117                 if (!current) {
 118                         current = Create(currentIndicator, lengthDocument);
 119                 }
 120         }
 121         bool changed = current->rs.FillRange(position, value, fillLength);
 122         if (current->Empty()) {
 123                 Delete(currentIndicator);
 124         }
 125         return changed;
 126 }
 127
 128 void DecorationList::InsertSpace(int position, int insertLength) {
 129         const bool atEnd = position == lengthDocument;
 130         lengthDocument += insertLength;
 131         for (Decoration *deco=root; deco; deco = deco->next) {
 132                 deco->rs.InsertSpace(position, insertLength);
 133                 if (atEnd) {
 134                         deco->rs.FillRange(position, 0, insertLength);
 135                 }
 136         }
 137 }
 138
 139 void DecorationList::DeleteRange(int position, int deleteLength) {
 140         lengthDocument -= deleteLength;
 141         Decoration *deco;
 142         for (deco=root; deco; deco = deco->next) {
 143                 deco->rs.DeleteRange(position, deleteLength);
 144         }
 145         DeleteAnyEmpty();
 146 }
 147
 148 void DecorationList::DeleteAnyEmpty() {
 149         Decoration *deco = root;
 150         while (deco) {
 151                 if (deco->Empty()) {
 152                         Delete(deco->indicator);
 153                         deco = root;
 154                 } else {
 155                         deco = deco->next;
 156                 }
 157         }
 158 }
 159
 160 int DecorationList::AllOnFor(int position) {
 161         int mask = 0;
 162         for (Decoration *deco=root; deco; deco = deco->next) {
 163                 if (deco->rs.ValueAt(position)) {
 164                         mask |= 1 << deco->indicator;
 165                 }
 166         }
 167         return mask;
 168 }
 169
 170 int DecorationList::ValueAt(int indicator, int position) {
 171         Decoration *deco = DecorationFromIndicator(indicator);
 172         if (deco) {
 173                 return deco->rs.ValueAt(position);
 174         }
 175         return 0;
 176 }
 177
 178 int DecorationList::Start(int indicator, int position) {
 179         Decoration *deco = DecorationFromIndicator(indicator);
 180         if (deco) {
 181                 return deco->rs.StartRun(position);
 182         }
 183         return 0;
 184 }
 185
 186 int DecorationList::End(int indicator, int position) {
 187         Decoration *deco = DecorationFromIndicator(indicator);
 188         if (deco) {
 189                 return deco->rs.EndRun(position);
 190         }
 191         return 0;
 192 }