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highlight keywords

This commit is contained in:
Ben Harris 2019-08-05 12:02:39 -04:00
parent 1f2dd407b0
commit d2a7328b09
1 changed files with 48 additions and 0 deletions
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48
kilo.c
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@ -38,6 +38,9 @@ enum editorKey {
enum editorHighlight {
HL_NORMAL = 0,
HL_COMMENT,
HL_KEYWORD1,
HL_KEYWORD2,
HL_STRING,
HL_NUMBER,
HL_MATCH
@ -51,6 +54,8 @@ enum editorHighlight {
struct editorSyntax {
char *filetype;
char **filematch;
char **keywords;
char *singleline_comment_start;
int flags;
};
@ -84,11 +89,19 @@ struct editorConfig E;
/*** filetypes ***/
char *C_HL_extensions[] = { ".c", ".h", ".cpp", NULL };
char *C_HL_keywords[] = {
"switch", "if", "while", "for", "break", "continue", "return", "else",
"struct", "union", "typedef", "static", "enum", "class", "case",
"int|", "long|", "double|", "float|", "char|" , "unsigned|", "signed|",
"void|", NULL
};
struct editorSyntax HLDB[] = {
{
"c",
C_HL_extensions,
C_HL_keywords,
"//",
HL_HIGHLIGHT_NUMBERS | HL_HIGHLIGHT_STRINGS
},
};
@ -243,6 +256,11 @@ void editorUpdateSyntax(erow *row) {
if (E.syntax == NULL)
return;
char **keywords = E.syntax->keywords;
char *scs = E.syntax->singleline_comment_start;
int scs_len = scs ? strlen(scs) : 0;
int prev_sep = 1;
int in_string = 0;
@ -251,6 +269,13 @@ void editorUpdateSyntax(erow *row) {
char c = row->render[i];
unsigned char prev_hl = (i > 0) ? row->hl[i - 1] : HL_NORMAL;
if (scs_len && !in_string) {
if (!strncmp(&row->render[i], scs, scs_len)) {
memset(&row->hl[i], HL_COMMENT, row->rsize - 1);
break;
}
}
if (E.syntax->flags & HL_HIGHLIGHT_STRINGS) {
if (in_string) {
row->hl[i] = HL_STRING;
@ -284,6 +309,26 @@ void editorUpdateSyntax(erow *row) {
}
}
if (prev_sep) {
int j;
for (j = 0; keywords[j]; j++) {
int klen = strlen(keywords[j]);
int kw2 = keywords[j][klen - 1] == '|';
if (kw2) klen--;
if (!strncmp(&row->render[i], keywords[j], klen) &&
is_separator(row->render[i + klen])) {
memset(&row->hl[i], kw2 ? HL_KEYWORD2 : HL_KEYWORD1, klen);
i += klen;
break;
}
}
if (keywords[j] != NULL) {
prev_sep = 0;
continue;
}
}
prev_sep = is_separator(c);
i++;
}
@ -291,6 +336,9 @@ void editorUpdateSyntax(erow *row) {
int editorSyntaxToColor(int hl) {
switch (hl) {
case HL_COMMENT: return 36;
case HL_KEYWORD1: return 33;
case HL_KEYWORD2: return 32;
case HL_STRING: return 35;
case HL_NUMBER: return 31;
case HL_NORMAL: return 34;