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Diffstat (limited to 'src/LexYAML.cxx')
| -rw-r--r-- | src/LexYAML.cxx | 181 |
1 files changed, 181 insertions, 0 deletions
diff --git a/src/LexYAML.cxx b/src/LexYAML.cxx new file mode 100644 index 000000000..da9816408 --- /dev/null +++ b/src/LexYAML.cxx @@ -0,0 +1,181 @@ +// 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 "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); |