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// Scintilla source code edit control
/** @file LexYAML.cxx
** Lexer for YAML.
**/
// Copyright 2003- by Sean O'Dell <sean@celsoft.com>
// Release under the same license as Scintilla/SciTE.
#include <stdlib.h>
#include <string.h>
#include <ctype.h>
#include <stdio.h>
#include "Platform.h"
#include "PropSet.h"
#include "Accessor.h"
#include "KeyWords.h"
#include "Scintilla.h"
#include "SciLexer.h"
static const char * const yamlWordListDesc[] = {
"Keywords",
0
};
static inline bool AtEOL(Accessor &styler, unsigned int i) {
return (styler[i] == '\n') ||
((styler[i] == '\r') && (styler.SafeGetCharAt(i + 1) != '\n'));
}
static void ColouriseYAMLLine(
char *lineBuffer,
unsigned int lengthLine,
unsigned int startLine,
unsigned int endPos,
WordList &keywords,
Accessor &styler) {
unsigned int i = 0;
bool bInQuotes = false;
unsigned int startValue, endValue, valueLen;
char scalar[256];
if (lineBuffer[0] == '#') { // Comment
styler.ColourTo(endPos, SCE_YAML_COMMENT);
return;
}
if (strncmp(lineBuffer, "---", 3) == 0) { // Document marker
styler.ColourTo(endPos, SCE_YAML_DOCUMENT);
return;
}
// Skip initial spaces
while ((i < lengthLine) && isspacechar(lineBuffer[i])) {
i++;
}
while (i < lengthLine) {
if (lineBuffer[i] == '\'' || lineBuffer[i] == '\"') {
bInQuotes = !bInQuotes;
} else if (lineBuffer[i] == ':' && !bInQuotes) {
styler.ColourTo(startLine + i, SCE_YAML_IDENTIFIER);
// Non-folding scalar
startValue = i + 1;
while ((startValue < lengthLine) && isspacechar(lineBuffer[startValue])) {
startValue++;
}
endValue = lengthLine - 1;
while ((endValue >= startValue) && isspacechar(lineBuffer[endValue])) {
endValue--;
}
valueLen = endValue - startValue + 1;
if (endValue < startValue || valueLen > sizeof(scalar)) {
break;
}
strncpy(scalar, &lineBuffer[startValue], valueLen);
scalar[valueLen] = '\0';
if (scalar[0] == '&' || scalar[0] == '*') {
styler.ColourTo(startLine + endValue, SCE_YAML_REFERENCE);
}
else if (keywords.InList(scalar)) { // Convertible value (true/false, etc.)
styler.ColourTo(startLine + endValue, SCE_YAML_KEYWORD);
} else {
startValue = 0;
while (startValue < valueLen) {
if (!isdigit(scalar[startValue]) && scalar[startValue] != '-' && scalar[startValue] != '.' && scalar[startValue] != ',') {
break;
}
startValue++;
}
if (startValue >= valueLen) {
styler.ColourTo(startLine + endValue, SCE_YAML_NUMBER);
}
}
break; // the rest of the line is coloured the default
}
i++;
}
styler.ColourTo(endPos, SCE_YAML_DEFAULT);
}
static void ColouriseYAMLDoc(unsigned int startPos, int length, int, WordList *keywordLists[], Accessor &styler) {
char lineBuffer[1024];
styler.StartAt(startPos);
styler.StartSegment(startPos);
unsigned int linePos = 0;
unsigned int startLine = startPos;
for (unsigned int i = startPos; i < startPos + length; i++) {
lineBuffer[linePos++] = styler[i];
if (AtEOL(styler, i) || (linePos >= sizeof(lineBuffer) - 1)) {
// End of line (or of line buffer) met, colourise it
lineBuffer[linePos] = '\0';
ColouriseYAMLLine(lineBuffer, linePos, startLine, i, *keywordLists[0], styler);
linePos = 0;
startLine = i + 1;
}
}
if (linePos > 0) { // Last line does not have ending characters
ColouriseYAMLLine(lineBuffer, linePos, startLine, startPos + length - 1, *keywordLists[0], styler);
}
}
static int IdentifierLevelYAMLLine(
char *lineBuffer,
unsigned int lengthLine) {
unsigned int i = 0;
bool bInQuotes = false;
int level;
if (lineBuffer[0] == '#') { // Comment
return 0xFFFFFFFF;
}
if (strncmp(lineBuffer, "---", 3) == 0) { // Document marker
return 0;
}
// Count initial spaces and '-' character
while ((i < lengthLine) && (isspacechar(lineBuffer[i]) || lineBuffer[i] == '-')) {
i++;
}
level = i;
while (i < lengthLine) {
if (lineBuffer[i] == '\'' || lineBuffer[i] == '\"') {
bInQuotes = !bInQuotes;
} else if (lineBuffer[i] == ':' && !bInQuotes) {
return level;
}
i++;
}
return -level; // Scalar
}
static void FoldYAMLDoc(unsigned int startPos, int length, int, WordList *[], Accessor &styler) {
char lineBuffer[1024];
styler.StartAt(startPos);
styler.StartSegment(startPos);
unsigned int linePos = 0;
int currentLevel;
int lastLevel = 0xFFFFFFFF;
unsigned int lineCurrent = 0;
for (unsigned int i = startPos; i < startPos + length; i++) {
lineBuffer[linePos++] = styler[i];
if (AtEOL(styler, i) || (linePos >= sizeof(lineBuffer) - 1)) {
// End of line (or of line buffer) met, colourise it
lineBuffer[linePos] = '\0';
currentLevel = IdentifierLevelYAMLLine(lineBuffer, linePos);
if (currentLevel != static_cast<int>(0xFFFFFFFF)) {
if (abs(currentLevel) > abs(lastLevel) && lastLevel >= 0) { // indented higher than last, and last was an identifier line
styler.SetLevel(lineCurrent - 1, SC_FOLDLEVELHEADERFLAG);
}
lastLevel = currentLevel;
}
linePos = 0;
lineCurrent++;
}
}
if (linePos > 0) { // Last line does not have ending characters
currentLevel = IdentifierLevelYAMLLine(lineBuffer, linePos);
if (currentLevel != static_cast<int>(0xFFFFFFFF)) {
if (abs(currentLevel) > abs(lastLevel) && lastLevel >= 0) {
styler.SetLevel(lineCurrent - 1, SC_FOLDLEVELHEADERFLAG);
}
}
}
}
LexerModule lmYAML(SCLEX_YAML, ColouriseYAMLDoc, "yaml", FoldYAMLDoc, yamlWordListDesc);
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