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>
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 <ctype.h>
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
~WindowAccessor()20 WindowAccessor::~WindowAccessor() {
21 }
22
InternalIsLeadByte(char ch)23 bool WindowAccessor::InternalIsLeadByte(char ch) {
24 if (SC_CP_UTF8 == codePage)
25 // For lexing, all characters >= 0x80 are treated the
26 // same so none is considered a lead byte.
27 return false;
28 else
29 return Platform::IsDBCSLeadByte(codePage, ch);
30 }
31
Fill(int position)32 void WindowAccessor::Fill(int position) {
33 if (lenDoc == -1)
34 lenDoc = Platform::SendScintilla(id, SCI_GETTEXTLENGTH, 0, 0);
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
44 TextRange tr = {{startPos, endPos}, buf};
45 Platform::SendScintillaPointer(id, SCI_GETTEXTRANGE, 0, &tr);
46 }
47
Match(int pos,const char * s)48 bool 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;
55 }
56
StyleAt(int position)57 char WindowAccessor::StyleAt(int position) {
58 return static_cast<char>(Platform::SendScintilla(
59 id, SCI_GETSTYLEAT, position, 0));
60 }
61
GetLine(int position)62 int WindowAccessor::GetLine(int position) {
63 return Platform::SendScintilla(id, SCI_LINEFROMPOSITION, position, 0);
64 }
65
LineStart(int line)66 int WindowAccessor::LineStart(int line) {
67 return Platform::SendScintilla(id, SCI_POSITIONFROMLINE, line, 0);
68 }
69
LevelAt(int line)70 int WindowAccessor::LevelAt(int line) {
71 return Platform::SendScintilla(id, SCI_GETFOLDLEVEL, line, 0);
72 }
73
Length()74 int WindowAccessor::Length() {
75 if (lenDoc == -1)
76 lenDoc = Platform::SendScintilla(id, SCI_GETTEXTLENGTH, 0, 0);
77 return lenDoc;
78 }
79
GetLineState(int line)80 int WindowAccessor::GetLineState(int line) {
81 return Platform::SendScintilla(id, SCI_GETLINESTATE, line);
82 }
83
SetLineState(int line,int state)84 int WindowAccessor::SetLineState(int line, int state) {
85 return Platform::SendScintilla(id, SCI_SETLINESTATE, line, state);
86 }
87
StartAt(unsigned int start,char chMask)88 void WindowAccessor::StartAt(unsigned int start, char chMask) {
89 Platform::SendScintilla(id, SCI_STARTSTYLING, start, chMask);
90 }
91
StartSegment(unsigned int pos)92 void WindowAccessor::StartSegment(unsigned int pos) {
93 startSeg = pos;
94 }
95
ColourTo(unsigned int pos,int chAttr)96 void 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
SetLevel(int line,int level)120 void WindowAccessor::SetLevel(int line, int level) {
121 Platform::SendScintilla(id, SCI_SETFOLDLEVEL, line, level);
122 }
123
Flush()124 void WindowAccessor::Flush() {
125 startPos = extremePosition;
126 lenDoc = -1;
127 if (validLen > 0) {
128 Platform::SendScintillaPointer(id, SCI_SETSTYLINGEX, validLen,
129 styleBuf);
130 validLen = 0;
131 }
132 }
133
IndentAmount(int line,int * flags,PFNIsCommentLeader pfnIsCommentLeader)134 int WindowAccessor::IndentAmount(int line, int *flags, PFNIsCommentLeader pfnIsCommentLeader) {
135 int end = Length();
136 int spaceFlags = 0;
137
138 // Determines the indentation level of the current line and also checks for consistent
139 // indentation compared to the previous line.
140 // Indentation is judged consistent when the indentation whitespace of each line lines
141 // the same or the indentation of one line is a prefix of the other.
142
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 }
169
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
179