summaryrefslogtreecommitdiffstats
path: root/src/AutoComplete.cpp
blob: daa5fbb6931bf3266696bf9e1de01e9f1e93182b (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
// Scintilla source code edit control
/** @file AutoComplete.cxx
 ** Defines the auto completion list box.
 **/
// Copyright 1998-2003 by Neil Hodgson <neilh@scintilla.org>
// The License.txt file describes the conditions under which this software may be distributed.

#include <stdlib.h>
#include <string.h>
#include <stdio.h>

#include "Platform.h"

#include "PropSet.h"
#include "AutoComplete.h"

AutoComplete::AutoComplete() :
	active(false),
	separator(' '),
	typesep('?'),
	ignoreCase(false),
	chooseSingle(false),
	lb(0),
	posStart(0),
	startLen(0),
	cancelAtStartPos(true),
	autoHide(true),
	dropRestOfWord(false)	{
	lb = ListBox::Allocate();
	stopChars[0] = '\0';
	fillUpChars[0] = '\0';
}

AutoComplete::~AutoComplete() {
	if (lb) {
		lb->Destroy();
		delete lb;
		lb = 0;
	}
}

bool AutoComplete::Active() {
	return active;
}

void AutoComplete::Start(Window &parent, int ctrlID, 
	int position, Point location, int startLen_, 
	int lineHeight, bool tqunicodeMode) {
	if (active) {
		Cancel();
	}
	lb->Create(parent, ctrlID, location, lineHeight, tqunicodeMode);
	lb->Clear();
	active = true;
	startLen = startLen_;
	posStart = position;
}

void AutoComplete::SetStopChars(const char *stopChars_) {
	strncpy(stopChars, stopChars_, sizeof(stopChars));
	stopChars[sizeof(stopChars) - 1] = '\0';
}

bool AutoComplete::IsStopChar(char ch) {
	return ch && strchr(stopChars, ch);
}

void AutoComplete::SetFillUpChars(const char *fillUpChars_) {
	strncpy(fillUpChars, fillUpChars_, sizeof(fillUpChars));
	fillUpChars[sizeof(fillUpChars) - 1] = '\0';
}

bool AutoComplete::IsFillUpChar(char ch) {
	return ch && strchr(fillUpChars, ch);
}

void AutoComplete::SetSeparator(char separator_) {
	separator = separator_;
}

char AutoComplete::GetSeparator() {
	return separator;
}

void AutoComplete::SetTypesep(char separator_) {
	typesep = separator_;
}

char AutoComplete::GetTypesep() {
	return typesep;
}

void AutoComplete::SetList(const char *list) {
	lb->SetList(list, separator, typesep);
}

void AutoComplete::Show(bool show) {
	lb->Show(show);
	if (show)
		lb->Select(0);
}

void AutoComplete::Cancel() {
	if (lb->Created()) {
		lb->Clear();
		lb->Destroy();
		active = false;
	}
}


void AutoComplete::Move(int delta) {
	int count = lb->Length();
	int current = lb->GetSelection();
	current += delta;
	if (current >= count)
		current = count - 1;
	if (current < 0)
		current = 0;
	lb->Select(current);
}

void AutoComplete::Select(const char *word) {
	size_t lenWord = strlen(word);
	int location = -1;
	const int maxItemLen=1000;
	char item[maxItemLen];
	int start = 0; // lower bound of the api array block to search
	int end = lb->Length() - 1; // upper bound of the api array block to search
	while ((start <= end) && (location == -1)) { // Binary searching loop
		int pivot = (start + end) / 2;
		lb->GetValue(pivot, item, maxItemLen);
		int cond;
		if (ignoreCase)
			cond = CompareNCaseInsensitive(word, item, lenWord);
		else
			cond = strncmp(word, item, lenWord);
		if (!cond) {
			// Find first match
			while (pivot > start) {
				lb->GetValue(pivot-1, item, maxItemLen);
				if (ignoreCase)
					cond = CompareNCaseInsensitive(word, item, lenWord);
				else
					cond = strncmp(word, item, lenWord);
				if (0 != cond)
					break;
				--pivot;
			}
			location = pivot;
			if (ignoreCase) {
				// Check for exact-case match
				for (; pivot <= end; pivot++) {
					lb->GetValue(pivot, item, maxItemLen);
					if (!strncmp(word, item, lenWord)) {
						location = pivot;
						break;
					}
					if (CompareNCaseInsensitive(word, item, lenWord))
						break;
				}
			}
		} else if (cond < 0) {
			end = pivot - 1;
		} else if (cond > 0) {
			start = pivot + 1;
		}
	}
	if (location == -1 && autoHide)
		Cancel();
	else
		lb->Select(location);
}