src/stc/scintilla/src/AutoComplete.cxx

   1 // Scintilla source code edit control
   2 /** @file AutoComplete.cxx
   3  ** Defines the auto completion list box.
   4  **/
   5 // Copyright 1998-2003 by Neil Hodgson <neilh@scintilla.org>
   6 // The License.txt file describes the conditions under which this software may be distributed.
   7
   8 #include <stdlib.h>
   9 #include <string.h>
  10 #include <stdio.h>
  11
  12 #include "Platform.h"
  13
  14 #include "CharClassify.h"
  15 #include "AutoComplete.h"
  16
  17 #ifdef SCI_NAMESPACE
  18 using namespace Scintilla;
  19 #endif
  20
  21 AutoComplete::AutoComplete() :
  22         active(false),
  23         separator(' '),
  24         typesep('?'),
  25         ignoreCase(false),
  26         chooseSingle(false),
  27         lb(0),
  28         posStart(0),
  29         startLen(0),
  30         cancelAtStartPos(true),
  31         autoHide(true),
  32         dropRestOfWord(false)   {
  33         lb = ListBox::Allocate();
  34         stopChars[0] = '\0';
  35         fillUpChars[0] = '\0';
  36 }
  37
  38 AutoComplete::~AutoComplete() {
  39         if (lb) {
  40                 lb->Destroy();
  41                 delete lb;
  42                 lb = 0;
  43         }
  44 }
  45
  46 bool AutoComplete::Active() {
  47         return active;
  48 }
  49
  50 void AutoComplete::Start(Window &parent, int ctrlID,
  51         int position, Point location, int startLen_,
  52         int lineHeight, bool unicodeMode) {
  53         if (active) {
  54                 Cancel();
  55         }
  56         lb->Create(parent, ctrlID, location, lineHeight, unicodeMode);
  57         lb->Clear();
  58         active = true;
  59         startLen = startLen_;
  60         posStart = position;
  61 }
  62
  63 void AutoComplete::SetStopChars(const char *stopChars_) {
  64         strncpy(stopChars, stopChars_, sizeof(stopChars));
  65         stopChars[sizeof(stopChars) - 1] = '\0';
  66 }
  67
  68 bool AutoComplete::IsStopChar(char ch) {
  69         return ch && strchr(stopChars, ch);
  70 }
  71
  72 void AutoComplete::SetFillUpChars(const char *fillUpChars_) {
  73         strncpy(fillUpChars, fillUpChars_, sizeof(fillUpChars));
  74         fillUpChars[sizeof(fillUpChars) - 1] = '\0';
  75 }
  76
  77 bool AutoComplete::IsFillUpChar(char ch) {
  78         return ch && strchr(fillUpChars, ch);
  79 }
  80
  81 void AutoComplete::SetSeparator(char separator_) {
  82         separator = separator_;
  83 }
  84
  85 char AutoComplete::GetSeparator() {
  86         return separator;
  87 }
  88
  89 void AutoComplete::SetTypesep(char separator_) {
  90         typesep = separator_;
  91 }
  92
  93 char AutoComplete::GetTypesep() {
  94         return typesep;
  95 }
  96
  97 void AutoComplete::SetList(const char *list) {
  98         lb->SetList(list, separator, typesep);
  99 }
 100
 101 void AutoComplete::Show(bool show) {
 102         lb->Show(show);
 103         if (show)
 104                 lb->Select(0);
 105 }
 106
 107 void AutoComplete::Cancel() {
 108         if (lb->Created()) {
 109                 lb->Clear();
 110                 lb->Destroy();
 111                 active = false;
 112         }
 113 }
 114
 115
 116 void AutoComplete::Move(int delta) {
 117         int count = lb->Length();
 118         int current = lb->GetSelection();
 119         current += delta;
 120         if (current >= count)
 121                 current = count - 1;
 122         if (current < 0)
 123                 current = 0;
 124         lb->Select(current);
 125 }
 126
 127 void AutoComplete::Select(const char *word) {
 128         size_t lenWord = strlen(word);
 129         int location = -1;
 130         const int maxItemLen=1000;
 131         char item[maxItemLen];
 132         int start = 0; // lower bound of the api array block to search
 133         int end = lb->Length() - 1; // upper bound of the api array block to search
 134         while ((start <= end) && (location == -1)) { // Binary searching loop
 135                 int pivot = (start + end) / 2;
 136                 lb->GetValue(pivot, item, maxItemLen);
 137                 int cond;
 138                 if (ignoreCase)
 139                         cond = CompareNCaseInsensitive(word, item, lenWord);
 140                 else
 141                         cond = strncmp(word, item, lenWord);
 142                 if (!cond) {
 143                         // Find first match
 144                         while (pivot > start) {
 145                                 lb->GetValue(pivot-1, item, maxItemLen);
 146                                 if (ignoreCase)
 147                                         cond = CompareNCaseInsensitive(word, item, lenWord);
 148                                 else
 149                                         cond = strncmp(word, item, lenWord);
 150                                 if (0 != cond)
 151                                         break;
 152                                 --pivot;
 153                         }
 154                         location = pivot;
 155                         if (ignoreCase) {
 156                                 // Check for exact-case match
 157                                 for (; pivot <= end; pivot++) {
 158                                         lb->GetValue(pivot, item, maxItemLen);
 159                                         if (!strncmp(word, item, lenWord)) {
 160                                                 location = pivot;
 161                                                 break;
 162                                         }
 163                                         if (CompareNCaseInsensitive(word, item, lenWord))
 164                                                 break;
 165                                 }
 166                         }
 167                 } else if (cond < 0) {
 168                         end = pivot - 1;
 169                 } else if (cond > 0) {
 170                         start = pivot + 1;
 171                 }
 172         }
 173         if (location == -1 && autoHide)
 174                 Cancel();
 175         else
 176                 lb->Select(location);
 177 }
 178