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-rw-r--r--src/LexTeX.cxx207
1 files changed, 203 insertions, 4 deletions
diff --git a/src/LexTeX.cxx b/src/LexTeX.cxx
index 55f0d3405..fb1df2423 100644
--- a/src/LexTeX.cxx
+++ b/src/LexTeX.cxx
@@ -12,6 +12,10 @@
// If you run into strange boundary cases, just tell me and I'll look into it.
+
+// TeX Folding code added by instanton (soft_share@126.com) with borrowed code from VisualTeX source by Alex Romanenko.
+// Version: June 22, 2007
+
#include <stdlib.h>
#include <string.h>
#include <ctype.h>
@@ -173,9 +177,9 @@ static void ColouriseTeXDoc(
styler.StartSegment(startPos) ;
bool processComment = styler.GetPropertyInt("lexer.tex.comment.process", 0) == 1 ;
- bool useKeywords = styler.GetPropertyInt("lexer.tex.use.keywords", 1) == 1 ;
+ bool useKeywords = styler.GetPropertyInt("lexer.tex.use.keywords", 1) == 1 ;
bool autoIf = styler.GetPropertyInt("lexer.tex.auto.if", 1) == 1 ;
- int defaultInterface = styler.GetPropertyInt("lexer.tex.interface.default", 1) ;
+ int defaultInterface = styler.GetPropertyInt("lexer.tex.interface.default", 1) ;
char key[100] ;
int k ;
@@ -276,7 +280,202 @@ static void ColouriseTeXDoc(
}
-// Hooks into the system:
+static inline bool isnumber(int ch) {
+ return
+ (ch == '0') || (ch == '1') || (ch == '2') ||
+ (ch == '3') || (ch == '4') || (ch == '5') ||
+ (ch == '6') || (ch == '7') || (ch == '8') || (ch == '9');
+}
+
+static inline bool iswordchar(int ch) {
+ return ((ch >= 'a') && (ch <= 'z')) || ((ch >= 'A') && (ch <= 'Z'));
+}
+
+static int ParseTeXCommand(unsigned int pos, Accessor &styler, char *command)
+{
+ int length=0;
+ char ch=styler.SafeGetCharAt(pos+1);
+
+ if(ch==',' || ch==':' || ch==';' || ch=='%'){
+ command[0]=ch;
+ command[1]=0;
+ return 1;
+ }
+
+ // find end
+ while(iswordchar(ch) && !isnumber(ch) && ch!='_' && ch!='.' && length<100){
+ command[length]=ch;
+ length++;
+ ch=styler.SafeGetCharAt(pos+length+1);
+ }
+
+ command[length]='\0';
+ if(!length) return 0;
+ return length+1;
+}
+
+static int classifyFoldPointTeXPaired(const char* s) {
+ int lev=0;
+ if (!(isdigit(s[0]) || (s[0] == '.'))){
+ if (strcmp(s, "begin")==0||strcmp(s,"FoldStart")==0||
+ strcmp(s,"abstract")==0||strcmp(s,"unprotect")==0||
+ strcmp(s,"title")==0||strncmp(s,"start",5)==0||strncmp(s,"Start",5)==0||
+ strcmp(s,"documentclass")==0||strncmp(s,"if",2)==0
+ )
+ lev=1;
+ if (strcmp(s, "end")==0||strcmp(s,"FoldStop")==0||
+ strcmp(s,"maketitle")==0||strcmp(s,"protect")==0||
+ strncmp(s,"stop",4)==0||strncmp(s,"Stop",4)==0||
+ strcmp(s,"fi")==0
+ )
+ lev=-1;
+ }
+ return lev;
+}
+
+static int classifyFoldPointTeXUnpaired(const char* s) {
+ int lev=0;
+ if (!(isdigit(s[0]) || (s[0] == '.'))){
+ if (strcmp(s,"part")==0||
+ strcmp(s,"chapter")==0||
+ strcmp(s,"section")==0||
+ strcmp(s,"subsection")==0||
+ strcmp(s,"subsubsection")==0||
+ strcmp(s,"CJKfamily")==0||
+ strcmp(s,"appendix")==0||
+ strcmp(s,"Topic")==0||strcmp(s,"topic")==0||
+ strcmp(s,"subject")==0||strcmp(s,"subsubject")==0||
+ strcmp(s,"def")==0||strcmp(s,"gdef")==0||strcmp(s,"edef")==0||
+ strcmp(s,"xdef")==0||strcmp(s,"framed")==0||
+ strcmp(s,"frame")==0||
+ strcmp(s,"foilhead")==0||strcmp(s,"overlays")==0||strcmp(s,"slide")==0
+ ){
+ lev=1;
+ }
+ }
+ return lev;
+}
+
+static bool IsTeXCommentLine(int line, Accessor &styler) {
+ int pos = styler.LineStart(line);
+ int eol_pos = styler.LineStart(line + 1) - 1;
+
+ int startpos = pos;
+
+ while (startpos<eol_pos){
+ char ch = styler[startpos];
+ if (ch!='%' && ch!=' ') return false;
+ else if (ch=='%') return true;
+ startpos++;
+ }
+
+ return false;
+}
+
+// FoldTeXDoc: borrowed from VisualTeX with modifications
+
+static void FoldTexDoc(unsigned int startPos, int length, int, WordList *[], Accessor &styler)
+{
+ bool foldCompact = styler.GetPropertyInt("fold.compact", 1) != 0;
+ unsigned int endPos = startPos+length;
+ int visibleChars=0;
+ int lineCurrent=styler.GetLine(startPos);
+ int levelPrev=styler.LevelAt(lineCurrent) & SC_FOLDLEVELNUMBERMASK;
+ int levelCurrent=levelPrev;
+ char chNext=styler[startPos];
+ char buffer[100]="";
+
+ for (unsigned int i=startPos; i < endPos; i++) {
+ char ch=chNext;
+ chNext=styler.SafeGetCharAt(i+1);
+ bool atEOL = (ch == '\r' && chNext != '\n') || (ch == '\n');
+
+ if(ch=='\\') {
+ ParseTeXCommand(i, styler, buffer);
+ levelCurrent += classifyFoldPointTeXPaired(buffer)+classifyFoldPointTeXUnpaired(buffer);
+ }
+
+ if((ch == '\r' || ch=='\n') && (chNext == '\\')){
+ ParseTeXCommand(i+1, styler, buffer);
+ levelCurrent -= classifyFoldPointTeXUnpaired(buffer);
+ }
+
+ char chNext2;
+ char chNext3;
+ char chNext4;
+ char chNext5;
+ chNext2=styler.SafeGetCharAt(i+2);
+ chNext3=styler.SafeGetCharAt(i+3);
+ chNext4=styler.SafeGetCharAt(i+4);
+ chNext5=styler.SafeGetCharAt(i+5);
+
+ bool atEOfold = (ch == '%') &&
+ (chNext == '%') && (chNext2=='}') &&
+ (chNext3=='}')&& (chNext4=='-')&& (chNext5=='-');
+
+ bool atBOfold = (ch == '%') &&
+ (chNext == '%') && (chNext2=='-') &&
+ (chNext3=='-')&& (chNext4=='{')&& (chNext5=='{');
+
+ if(atBOfold){
+ levelCurrent+=1;
+ }
+
+ if(atEOfold){
+ levelCurrent-=1;
+ }
+
+ if(ch=='\\' && chNext=='['){
+ levelCurrent+=1;
+ }
+
+ if(ch=='\\' && chNext==']'){
+ levelCurrent-=1;
+ }
+
+ bool foldComment = styler.GetPropertyInt("fold.comment") != 0;
+
+ if (foldComment && atEOL && IsTeXCommentLine(lineCurrent, styler))
+ {
+ if (lineCurrent==0 && IsTeXCommentLine(lineCurrent + 1, styler)
+ )
+ levelCurrent++;
+ else if (lineCurrent!=0 && !IsTeXCommentLine(lineCurrent - 1, styler)
+ && IsTeXCommentLine(lineCurrent + 1, styler)
+ )
+ levelCurrent++;
+ else if (lineCurrent!=0 && IsTeXCommentLine(lineCurrent - 1, styler) &&
+ !IsTeXCommentLine(lineCurrent+1, styler))
+ levelCurrent--;
+ }
+
+//---------------------------------------------------------------------------------------------
+
+ if (atEOL) {
+ int lev = levelPrev;
+ if (visibleChars == 0 && foldCompact)
+ lev |= SC_FOLDLEVELWHITEFLAG;
+ if ((levelCurrent > levelPrev) && (visibleChars > 0))
+ lev |= SC_FOLDLEVELHEADERFLAG;
+ if (lev != styler.LevelAt(lineCurrent)) {
+ styler.SetLevel(lineCurrent, lev);
+ }
+ lineCurrent++;
+ levelPrev = levelCurrent;
+ visibleChars = 0;
+ }
+
+ if (!isspacechar(ch))
+ visibleChars++;
+ }
+
+ // Fill in the real level of the next line, keeping the current flags as they will be filled in later
+ int flagsNext = styler.LevelAt(lineCurrent) & ~SC_FOLDLEVELNUMBERMASK;
+ styler.SetLevel(lineCurrent, levelPrev | flagsNext);
+}
+
+
+
static const char * const texWordListDesc[] = {
"TeX, eTeX, pdfTeX, Omega",
@@ -289,4 +488,4 @@ static const char * const texWordListDesc[] = {
0,
} ;
-LexerModule lmTeX(SCLEX_TEX, ColouriseTeXDoc, "tex", 0, texWordListDesc);
+LexerModule lmTeX(SCLEX_TEX, ColouriseTeXDoc, "tex", FoldTexDoc, texWordListDesc);
generated by cgit v1.2.3 (git 2.25.1) at 2025-10-13 04:53:39 +0000