implemented DrawCheckButton() for XP renderer; code cleanup
[wxWidgets.git] / src / stc / scintilla / src / WindowAccessor.cxx
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1// Scintilla source code edit control
2/** @file WindowAccessor.cxx
3 ** Rapid easy access to contents of a Scintilla.
4 **/
5// Copyright 1998-2001 by Neil Hodgson <neilh@scintilla.org>
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6// The License.txt file describes the conditions under which this software may be distributed.
7
8#include <stdlib.h>
d134f170 9#include <string.h>
88a8b04e 10#include <ctype.h>
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11#include <stdio.h>
12
13#include "Platform.h"
14
15#include "PropSet.h"
16#include "Accessor.h"
17#include "WindowAccessor.h"
18#include "Scintilla.h"
19
20WindowAccessor::~WindowAccessor() {
21}
22
23bool WindowAccessor::InternalIsLeadByte(char ch) {
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24 if (SC_CP_UTF8 == codePage)
25 // For lexing, all characters >= 0x80 are treated the
26 // same so none is considered a lead byte.
88a8b04e 27 return false;
f6bcfd97 28 else
1a2fb4cd 29 return Platform::IsDBCSLeadByte(codePage, ch);
d134f170 30}
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31
32void WindowAccessor::Fill(int position) {
33 if (lenDoc == -1)
d134f170 34 lenDoc = Platform::SendScintilla(id, SCI_GETTEXTLENGTH, 0, 0);
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35 startPos = position - slopSize;
36 if (startPos + bufferSize > lenDoc)
37 startPos = lenDoc - bufferSize;
38 if (startPos < 0)
39 startPos = 0;
40 endPos = startPos + bufferSize;
41 if (endPos > lenDoc)
42 endPos = lenDoc;
43
d134f170 44 TextRange tr = {{startPos, endPos}, buf};
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45 Platform::SendScintillaPointer(id, SCI_GETTEXTRANGE, 0, &tr);
46}
47
48bool WindowAccessor::Match(int pos, const char *s) {
49 for (int i=0; *s; i++) {
50 if (*s != SafeGetCharAt(pos+i))
51 return false;
52 s++;
53 }
54 return true;
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55}
56
57char WindowAccessor::StyleAt(int position) {
58 return static_cast<char>(Platform::SendScintilla(
59 id, SCI_GETSTYLEAT, position, 0));
60}
61
62int WindowAccessor::GetLine(int position) {
d134f170 63 return Platform::SendScintilla(id, SCI_LINEFROMPOSITION, position, 0);
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64}
65
66int WindowAccessor::LineStart(int line) {
d134f170 67 return Platform::SendScintilla(id, SCI_POSITIONFROMLINE, line, 0);
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68}
69
70int WindowAccessor::LevelAt(int line) {
71 return Platform::SendScintilla(id, SCI_GETFOLDLEVEL, line, 0);
72}
73
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74int WindowAccessor::Length() {
75 if (lenDoc == -1)
d134f170 76 lenDoc = Platform::SendScintilla(id, SCI_GETTEXTLENGTH, 0, 0);
88a8b04e 77 return lenDoc;
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78}
79
80int WindowAccessor::GetLineState(int line) {
81 return Platform::SendScintilla(id, SCI_GETLINESTATE, line);
82}
83
84int WindowAccessor::SetLineState(int line, int state) {
85 return Platform::SendScintilla(id, SCI_SETLINESTATE, line, state);
86}
87
88void WindowAccessor::StartAt(unsigned int start, char chMask) {
89 Platform::SendScintilla(id, SCI_STARTSTYLING, start, chMask);
90}
91
92void WindowAccessor::StartSegment(unsigned int pos) {
93 startSeg = pos;
94}
95
96void WindowAccessor::ColourTo(unsigned int pos, int chAttr) {
97 // Only perform styling if non empty range
98 if (pos != startSeg - 1) {
99 if (pos < startSeg) {
100 Platform::DebugPrintf("Bad colour positions %d - %d\n", startSeg, pos);
101 }
102
103 if (validLen + (pos - startSeg + 1) >= bufferSize)
104 Flush();
105 if (validLen + (pos - startSeg + 1) >= bufferSize) {
106 // Too big for buffer so send directly
107 Platform::SendScintilla(id, SCI_SETSTYLING, pos - startSeg + 1, chAttr);
108 } else {
109 if (chAttr != chWhile)
110 chFlags = 0;
111 chAttr |= chFlags;
112 for (unsigned int i = startSeg; i <= pos; i++) {
113 styleBuf[validLen++] = static_cast<char>(chAttr);
114 }
115 }
116 }
117 startSeg = pos+1;
118}
119
120void WindowAccessor::SetLevel(int line, int level) {
121 Platform::SendScintilla(id, SCI_SETFOLDLEVEL, line, level);
122}
123
124void WindowAccessor::Flush() {
125 startPos = extremePosition;
126 lenDoc = -1;
127 if (validLen > 0) {
88a8b04e 128 Platform::SendScintillaPointer(id, SCI_SETSTYLINGEX, validLen,
a834585d 129 styleBuf);
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130 validLen = 0;
131 }
132}
133
134int WindowAccessor::IndentAmount(int line, int *flags, PFNIsCommentLeader pfnIsCommentLeader) {
135 int end = Length();
136 int spaceFlags = 0;
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137
138 // Determines the indentation level of the current line and also checks for consistent
f6bcfd97 139 // indentation compared to the previous line.
88a8b04e 140 // Indentation is judged consistent when the indentation whitespace of each line lines
f6bcfd97 141 // the same or the indentation of one line is a prefix of the other.
88a8b04e 142
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143 int pos = LineStart(line);
144 char ch = (*this)[pos];
145 int indent = 0;
146 bool inPrevPrefix = line > 0;
147 int posPrev = inPrevPrefix ? LineStart(line-1) : 0;
148 while ((ch == ' ' || ch == '\t') && (pos < end)) {
149 if (inPrevPrefix) {
150 char chPrev = (*this)[posPrev++];
151 if (chPrev == ' ' || chPrev == '\t') {
152 if (chPrev != ch)
153 spaceFlags |= wsInconsistent;
154 } else {
155 inPrevPrefix = false;
156 }
157 }
158 if (ch == ' ') {
159 spaceFlags |= wsSpace;
160 indent++;
161 } else { // Tab
162 spaceFlags |= wsTab;
163 if (spaceFlags & wsSpace)
164 spaceFlags |= wsSpaceTab;
165 indent = (indent / 8 + 1) * 8;
166 }
167 ch = (*this)[++pos];
168 }
88a8b04e 169
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170 *flags = spaceFlags;
171 indent += SC_FOLDLEVELBASE;
172 // if completely empty line or the start of a comment...
173 if (isspace(ch) || (pfnIsCommentLeader && (*pfnIsCommentLeader)(*this, pos, end-pos)) )
174 return indent | SC_FOLDLEVELWHITEFLAG;
175 else
176 return indent;
177}
178