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 <stdlib.h>
   8 #include <string.h>
   9 #include <stdio.h>
  10 #include <stdarg.h>
  11
  12 #include <algorithm>
  13
  14 #include "Platform.h"
  15
  16 #include "Scintilla.h"
  17 #include "SplitVector.h"
  18 #include "Partitioning.h"
  19 #include "RunStyles.h"
  20 #include "Decoration.h"
  21
  22 #ifdef SCI_NAMESPACE
  23 using namespace Scintilla;
  24 #endif
  25
  26 Decoration::Decoration(int indicator_) : next(0), indicator(indicator_) {
  27 }
  28
  29 Decoration::~Decoration() {
  30 }
  31
  32 bool Decoration::Empty() const {
  33         return (rs.Runs() == 1) && (rs.AllSameAs(0));
  34 }
  35
  36 DecorationList::DecorationList() : currentIndicator(0), currentValue(1), current(0),
  37         lengthDocument(0), root(0), clickNotified(false) {
  38 }
  39
  40 DecorationList::~DecorationList() {
  41         Decoration *deco = root;
  42         while (deco) {
  43                 Decoration *decoNext = deco->next;
  44                 delete deco;
  45                 deco = decoNext;
  46         }
  47         root = 0;
  48         current = 0;
  49 }
  50
  51 Decoration *DecorationList::DecorationFromIndicator(int indicator) {
  52         for (Decoration *deco=root; deco; deco = deco->next) {
  53                 if (deco->indicator == indicator) {
  54                         return deco;
  55                 }
  56         }
  57         return 0;
  58 }
  59
  60 Decoration *DecorationList::Create(int indicator, int length) {
  61         currentIndicator = indicator;
  62         Decoration *decoNew = new Decoration(indicator);
  63         decoNew->rs.InsertSpace(0, length);
  64
  65         Decoration *decoPrev = 0;
  66         Decoration *deco = root;
  67
  68         while (deco && (deco->indicator < indicator)) {
  69                 decoPrev = deco;
  70                 deco = deco->next;
  71         }
  72         if (decoPrev == 0) {
  73                 decoNew->next = root;
  74                 root = decoNew;
  75         } else {
  76                 decoNew->next = deco;
  77                 decoPrev->next = decoNew;
  78         }
  79         return decoNew;
  80 }
  81
  82 void DecorationList::Delete(int indicator) {
  83         Decoration *decoToDelete = 0;
  84         if (root) {
  85                 if (root->indicator == indicator) {
  86                         decoToDelete = root;
  87                         root = root->next;
  88                 } else {
  89                         Decoration *deco=root;
  90                         while (deco->next && !decoToDelete) {
  91                                 if (deco->next && deco->next->indicator == indicator) {
  92                                         decoToDelete = deco->next;
  93                                         deco->next = decoToDelete->next;
  94                                 } else {
  95                                         deco = deco->next;
  96                                 }
  97                         }
  98                 }
  99         }
 100         if (decoToDelete) {
 101                 delete decoToDelete;
 102                 current = 0;
 103         }
 104 }
 105
 106 void DecorationList::SetCurrentIndicator(int indicator) {
 107         currentIndicator = indicator;
 108         current = DecorationFromIndicator(indicator);
 109         currentValue = 1;
 110 }
 111
 112 void DecorationList::SetCurrentValue(int value) {
 113         currentValue = value ? value : 1;
 114 }
 115
 116 bool DecorationList::FillRange(int &position, int value, int &fillLength) {
 117         if (!current) {
 118                 current = DecorationFromIndicator(currentIndicator);
 119                 if (!current) {
 120                         current = Create(currentIndicator, lengthDocument);
 121                 }
 122         }
 123         bool changed = current->rs.FillRange(position, value, fillLength);
 124         if (current->Empty()) {
 125                 Delete(currentIndicator);
 126         }
 127         return changed;
 128 }
 129
 130 void DecorationList::InsertSpace(int position, int insertLength) {
 131         const bool atEnd = position == lengthDocument;
 132         lengthDocument += insertLength;
 133         for (Decoration *deco=root; deco; deco = deco->next) {
 134                 deco->rs.InsertSpace(position, insertLength);
 135                 if (atEnd) {
 136                         deco->rs.FillRange(position, 0, insertLength);
 137                 }
 138         }
 139 }
 140
 141 void DecorationList::DeleteRange(int position, int deleteLength) {
 142         lengthDocument -= deleteLength;
 143         Decoration *deco;
 144         for (deco=root; deco; deco = deco->next) {
 145                 deco->rs.DeleteRange(position, deleteLength);
 146         }
 147         DeleteAnyEmpty();
 148 }
 149
 150 void DecorationList::DeleteAnyEmpty() {
 151         Decoration *deco = root;
 152         while (deco) {
 153                 if ((lengthDocument == 0) || deco->Empty()) {
 154                         Delete(deco->indicator);
 155                         deco = root;
 156                 } else {
 157                         deco = deco->next;
 158                 }
 159         }
 160 }
 161
 162 int DecorationList::AllOnFor(int position) const {
 163         int mask = 0;
 164         for (Decoration *deco=root; deco; deco = deco->next) {
 165                 if (deco->rs.ValueAt(position)) {
 166                         mask |= 1 << deco->indicator;
 167                 }
 168         }
 169         return mask;
 170 }
 171
 172 int DecorationList::ValueAt(int indicator, int position) {
 173         Decoration *deco = DecorationFromIndicator(indicator);
 174         if (deco) {
 175                 return deco->rs.ValueAt(position);
 176         }
 177         return 0;
 178 }
 179
 180 int DecorationList::Start(int indicator, int position) {
 181         Decoration *deco = DecorationFromIndicator(indicator);
 182         if (deco) {
 183                 return deco->rs.StartRun(position);
 184         }
 185         return 0;
 186 }
 187
 188 int DecorationList::End(int indicator, int position) {
 189         Decoration *deco = DecorationFromIndicator(indicator);
 190         if (deco) {
 191                 return deco->rs.EndRun(position);
 192         }
 193         return 0;
 194 }