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-// Scintilla source code edit control
-/** @file LexPython.cxx
- ** Lexer for Python.
- **/
-// Copyright 1998-2002 by Neil Hodgson <neilh@scintilla.org>
-// The License.txt file describes the conditions under which this software may be distributed.
-
-#include <cstdlib>
-#include <cassert>
-#include <cstring>
-
-#include <string>
-#include <vector>
-#include <map>
-#include <algorithm>
-
-#include "ILexer.h"
-#include "Scintilla.h"
-#include "SciLexer.h"
-
-#include "StringCopy.h"
-#include "WordList.h"
-#include "LexAccessor.h"
-#include "Accessor.h"
-#include "StyleContext.h"
-#include "CharacterSet.h"
-#include "CharacterCategory.h"
-#include "LexerModule.h"
-#include "OptionSet.h"
-#include "SubStyles.h"
-#include "DefaultLexer.h"
-
-using namespace Scintilla;
-
-namespace {
-// Use an unnamed namespace to protect the functions and classes from name conflicts
-
-/* Notes on f-strings: f-strings are strings prefixed with f (e.g. f'') that may
- have arbitrary expressions in {}. The tokens in the expressions are lexed as if
- they were outside of any string. Expressions may contain { and } characters as
- long as there is a closing } for every {, may be 2+ lines in a triple quoted
- string, and may have a formatting specifier following a ! or :, but both !
- and : are valid inside of a bracketed expression and != is a valid
- expression token even outside of a bracketed expression.
-
- When in an f-string expression, the lexer keeps track of the state value of
- the f-string and the nesting count for the expression (# of [, (, { seen - # of
- }, ), ] seen). f-strings may be nested (e.g. f'{ a + f"{1+2}"') so a stack of
- states and nesting counts is kept. If a f-string expression continues beyond
- the end of a line, this stack is saved in a std::map that maps a line number to
- the stack at the end of that line. std::vector is used for the stack.
-
- The PEP for f-strings is at https://www.python.org/dev/peps/pep-0498/
-*/
-struct SingleFStringExpState {
- int state;
- int nestingCount;
-};
-
-/* kwCDef, kwCTypeName only used for Cython */
-enum kwType { kwOther, kwClass, kwDef, kwImport, kwCDef, kwCTypeName, kwCPDef };
-
-enum literalsAllowed { litNone = 0, litU = 1, litB = 2, litF = 4 };
-
-constexpr int indicatorWhitespace = 1;
-
-bool IsPyComment(Accessor &styler, Sci_Position pos, Sci_Position len) {
- return len > 0 && styler[pos] == '#';
-}
-
-bool IsPyStringTypeChar(int ch, literalsAllowed allowed) noexcept {
- return
- ((allowed & litB) && (ch == 'b' || ch == 'B')) ||
- ((allowed & litU) && (ch == 'u' || ch == 'U')) ||
- ((allowed & litF) && (ch == 'f' || ch == 'F'));
-}
-
-bool IsPyStringStart(int ch, int chNext, int chNext2, literalsAllowed allowed) noexcept {
- if (ch == '\'' || ch == '"')
- return true;
- if (IsPyStringTypeChar(ch, allowed)) {
- if (chNext == '"' || chNext == '\'')
- return true;
- if ((chNext == 'r' || chNext == 'R') && (chNext2 == '"' || chNext2 == '\''))
- return true;
- }
- if ((ch == 'r' || ch == 'R') && (chNext == '"' || chNext == '\''))
- return true;
-
- return false;
-}
-
-bool IsPyFStringState(int st) noexcept {
- return ((st == SCE_P_FCHARACTER) || (st == SCE_P_FSTRING) ||
- (st == SCE_P_FTRIPLE) || (st == SCE_P_FTRIPLEDOUBLE));
-}
-
-bool IsPySingleQuoteStringState(int st) noexcept {
- return ((st == SCE_P_CHARACTER) || (st == SCE_P_STRING) ||
- (st == SCE_P_FCHARACTER) || (st == SCE_P_FSTRING));
-}
-
-bool IsPyTripleQuoteStringState(int st) noexcept {
- return ((st == SCE_P_TRIPLE) || (st == SCE_P_TRIPLEDOUBLE) ||
- (st == SCE_P_FTRIPLE) || (st == SCE_P_FTRIPLEDOUBLE));
-}
-
-char GetPyStringQuoteChar(int st) noexcept {
- if ((st == SCE_P_CHARACTER) || (st == SCE_P_FCHARACTER) ||
- (st == SCE_P_TRIPLE) || (st == SCE_P_FTRIPLE))
- return '\'';
- if ((st == SCE_P_STRING) || (st == SCE_P_FSTRING) ||
- (st == SCE_P_TRIPLEDOUBLE) || (st == SCE_P_FTRIPLEDOUBLE))
- return '"';
-
- return '\0';
-}
-
-void PushStateToStack(int state, std::vector<SingleFStringExpState> &stack, SingleFStringExpState *&currentFStringExp) {
- SingleFStringExpState single = {state, 0};
- stack.push_back(single);
-
- currentFStringExp = &stack.back();
-}
-
-int PopFromStateStack(std::vector<SingleFStringExpState> &stack, SingleFStringExpState *&currentFStringExp) noexcept {
- int state = 0;
-
- if (!stack.empty()) {
- state = stack.back().state;
- stack.pop_back();
- }
-
- if (stack.empty()) {
- currentFStringExp = nullptr;
- } else {
- currentFStringExp = &stack.back();
- }
-
- return state;
-}
-
-/* Return the state to use for the string starting at i; *nextIndex will be set to the first index following the quote(s) */
-int GetPyStringState(Accessor &styler, Sci_Position i, Sci_PositionU *nextIndex, literalsAllowed allowed) {
- char ch = styler.SafeGetCharAt(i);
- char chNext = styler.SafeGetCharAt(i + 1);
- const int firstIsF = (ch == 'f' || ch == 'F');
-
- // Advance beyond r, u, or ur prefix (or r, b, or br in Python 2.7+ and r, f, or fr in Python 3.6+), but bail if there are any unexpected chars
- if (ch == 'r' || ch == 'R') {
- i++;
- ch = styler.SafeGetCharAt(i);
- chNext = styler.SafeGetCharAt(i + 1);
- } else if (IsPyStringTypeChar(ch, allowed)) {
- if (chNext == 'r' || chNext == 'R')
- i += 2;
- else
- i += 1;
- ch = styler.SafeGetCharAt(i);
- chNext = styler.SafeGetCharAt(i + 1);
- }
-
- if (ch != '"' && ch != '\'') {
- *nextIndex = i + 1;
- return SCE_P_DEFAULT;
- }
-
- if (ch == chNext && ch == styler.SafeGetCharAt(i + 2)) {
- *nextIndex = i + 3;
-
- if (ch == '"')
- return (firstIsF ? SCE_P_FTRIPLEDOUBLE : SCE_P_TRIPLEDOUBLE);
- else
- return (firstIsF ? SCE_P_FTRIPLE : SCE_P_TRIPLE);
- } else {
- *nextIndex = i + 1;
-
- if (ch == '"')
- return (firstIsF ? SCE_P_FSTRING : SCE_P_STRING);
- else
- return (firstIsF ? SCE_P_FCHARACTER : SCE_P_CHARACTER);
- }
-}
-
-inline bool IsAWordChar(int ch, bool unicodeIdentifiers) {
- if (IsASCII(ch))
- return (IsAlphaNumeric(ch) || ch == '.' || ch == '_');
-
- if (!unicodeIdentifiers)
- return false;
-
- // Python uses the XID_Continue set from Unicode data
- return IsXidContinue(ch);
-}
-
-inline bool IsAWordStart(int ch, bool unicodeIdentifiers) {
- if (IsASCII(ch))
- return (IsUpperOrLowerCase(ch) || ch == '_');
-
- if (!unicodeIdentifiers)
- return false;
-
- // Python uses the XID_Start set from Unicode data
- return IsXidStart(ch);
-}
-
-bool IsFirstNonWhitespace(Sci_Position pos, Accessor &styler) {
- const Sci_Position line = styler.GetLine(pos);
- const Sci_Position start_pos = styler.LineStart(line);
- for (Sci_Position i = start_pos; i < pos; i++) {
- const char ch = styler[i];
- if (!(ch == ' ' || ch == '\t'))
- return false;
- }
- return true;
-}
-
-// Options used for LexerPython
-struct OptionsPython {
- int whingeLevel;
- bool base2or8Literals;
- bool stringsU;
- bool stringsB;
- bool stringsF;
- bool stringsOverNewline;
- bool keywords2NoSubIdentifiers;
- bool fold;
- bool foldQuotes;
- bool foldCompact;
- bool unicodeIdentifiers;
-
- OptionsPython() {
- whingeLevel = 0;
- base2or8Literals = true;
- stringsU = true;
- stringsB = true;
- stringsF = true;
- stringsOverNewline = false;
- keywords2NoSubIdentifiers = false;
- fold = false;
- foldQuotes = false;
- foldCompact = false;
- unicodeIdentifiers = true;
- }
-
- literalsAllowed AllowedLiterals() const noexcept {
- literalsAllowed allowedLiterals = stringsU ? litU : litNone;
- if (stringsB)
- allowedLiterals = static_cast<literalsAllowed>(allowedLiterals | litB);
- if (stringsF)
- allowedLiterals = static_cast<literalsAllowed>(allowedLiterals | litF);
- return allowedLiterals;
- }
-};
-
-const char *const pythonWordListDesc[] = {
- "Keywords",
- "Highlighted identifiers",
- nullptr
-};
-
-struct OptionSetPython : public OptionSet<OptionsPython> {
- OptionSetPython() {
- DefineProperty("tab.timmy.whinge.level", &OptionsPython::whingeLevel,
- "For Python code, checks whether indenting is consistent. "
- "The default, 0 turns off indentation checking, "
- "1 checks whether each line is potentially inconsistent with the previous line, "
- "2 checks whether any space characters occur before a tab character in the indentation, "
- "3 checks whether any spaces are in the indentation, and "
- "4 checks for any tab characters in the indentation. "
- "1 is a good level to use.");
-
- DefineProperty("lexer.python.literals.binary", &OptionsPython::base2or8Literals,
- "Set to 0 to not recognise Python 3 binary and octal literals: 0b1011 0o712.");
-
- DefineProperty("lexer.python.strings.u", &OptionsPython::stringsU,
- "Set to 0 to not recognise Python Unicode literals u\"x\" as used before Python 3.");
-
- DefineProperty("lexer.python.strings.b", &OptionsPython::stringsB,
- "Set to 0 to not recognise Python 3 bytes literals b\"x\".");
-
- DefineProperty("lexer.python.strings.f", &OptionsPython::stringsF,
- "Set to 0 to not recognise Python 3.6 f-string literals f\"var={var}\".");
-
- DefineProperty("lexer.python.strings.over.newline", &OptionsPython::stringsOverNewline,
- "Set to 1 to allow strings to span newline characters.");
-
- DefineProperty("lexer.python.keywords2.no.sub.identifiers", &OptionsPython::keywords2NoSubIdentifiers,
- "When enabled, it will not style keywords2 items that are used as a sub-identifier. "
- "Example: when set, will not highlight \"foo.open\" when \"open\" is a keywords2 item.");
-
- DefineProperty("fold", &OptionsPython::fold);
-
- DefineProperty("fold.quotes.python", &OptionsPython::foldQuotes,
- "This option enables folding multi-line quoted strings when using the Python lexer.");
-
- DefineProperty("fold.compact", &OptionsPython::foldCompact);
-
- DefineProperty("lexer.python.unicode.identifiers", &OptionsPython::unicodeIdentifiers,
- "Set to 0 to not recognise Python 3 Unicode identifiers.");
-
- DefineWordListSets(pythonWordListDesc);
- }
-};
-
-const char styleSubable[] = { SCE_P_IDENTIFIER, 0 };
-
-LexicalClass lexicalClasses[] = {
- // Lexer Python SCLEX_PYTHON SCE_P_:
- 0, "SCE_P_DEFAULT", "default", "White space",
- 1, "SCE_P_COMMENTLINE", "comment line", "Comment",
- 2, "SCE_P_NUMBER", "literal numeric", "Number",
- 3, "SCE_P_STRING", "literal string", "String",
- 4, "SCE_P_CHARACTER", "literal string", "Single quoted string",
- 5, "SCE_P_WORD", "keyword", "Keyword",
- 6, "SCE_P_TRIPLE", "literal string", "Triple quotes",
- 7, "SCE_P_TRIPLEDOUBLE", "literal string", "Triple double quotes",
- 8, "SCE_P_CLASSNAME", "identifier", "Class name definition",
- 9, "SCE_P_DEFNAME", "identifier", "Function or method name definition",
- 10, "SCE_P_OPERATOR", "operator", "Operators",
- 11, "SCE_P_IDENTIFIER", "identifier", "Identifiers",
- 12, "SCE_P_COMMENTBLOCK", "comment", "Comment-blocks",
- 13, "SCE_P_STRINGEOL", "error literal string", "End of line where string is not closed",
- 14, "SCE_P_WORD2", "identifier", "Highlighted identifiers",
- 15, "SCE_P_DECORATOR", "preprocessor", "Decorators",
- 16, "SCE_P_FSTRING", "literal string interpolated", "F-String",
- 17, "SCE_P_FCHARACTER", "literal string interpolated", "Single quoted f-string",
- 18, "SCE_P_FTRIPLE", "literal string interpolated", "Triple quoted f-string",
- 19, "SCE_P_FTRIPLEDOUBLE", "literal string interpolated", "Triple double quoted f-string",
-};
-
-}
-
-class LexerPython : public DefaultLexer {
- WordList keywords;
- WordList keywords2;
- OptionsPython options;
- OptionSetPython osPython;
- enum { ssIdentifier };
- SubStyles subStyles;
- std::map<Sci_Position, std::vector<SingleFStringExpState> > ftripleStateAtEol;
-public:
- explicit LexerPython() :
- DefaultLexer("python", SCLEX_PYTHON, lexicalClasses, ELEMENTS(lexicalClasses)),
- subStyles(styleSubable, 0x80, 0x40, 0) {
- }
- ~LexerPython() override {
- }
- void SCI_METHOD Release() override {
- delete this;
- }
- int SCI_METHOD Version() const override {
- return lvRelease5;
- }
- const char *SCI_METHOD PropertyNames() override {
- return osPython.PropertyNames();
- }
- int SCI_METHOD PropertyType(const char *name) override {
- return osPython.PropertyType(name);
- }
- const char *SCI_METHOD DescribeProperty(const char *name) override {
- return osPython.DescribeProperty(name);
- }
- Sci_Position SCI_METHOD PropertySet(const char *key, const char *val) override;
- const char * SCI_METHOD PropertyGet(const char *key) override {
- return osPython.PropertyGet(key);
- }
- const char *SCI_METHOD DescribeWordListSets() override {
- return osPython.DescribeWordListSets();
- }
- Sci_Position SCI_METHOD WordListSet(int n, const char *wl) override;
- void SCI_METHOD Lex(Sci_PositionU startPos, Sci_Position length, int initStyle, IDocument *pAccess) override;
- void SCI_METHOD Fold(Sci_PositionU startPos, Sci_Position length, int initStyle, IDocument *pAccess) override;
-
- void *SCI_METHOD PrivateCall(int, void *) override {
- return nullptr;
- }
-
- int SCI_METHOD LineEndTypesSupported() override {
- return SC_LINE_END_TYPE_UNICODE;
- }
-
- int SCI_METHOD AllocateSubStyles(int styleBase, int numberStyles) override {
- return subStyles.Allocate(styleBase, numberStyles);
- }
- int SCI_METHOD SubStylesStart(int styleBase) override {
- return subStyles.Start(styleBase);
- }
- int SCI_METHOD SubStylesLength(int styleBase) override {
- return subStyles.Length(styleBase);
- }
- int SCI_METHOD StyleFromSubStyle(int subStyle) override {
- const int styleBase = subStyles.BaseStyle(subStyle);
- return styleBase;
- }
- int SCI_METHOD PrimaryStyleFromStyle(int style) override {
- return style;
- }
- void SCI_METHOD FreeSubStyles() override {
- subStyles.Free();
- }
- void SCI_METHOD SetIdentifiers(int style, const char *identifiers) override {
- subStyles.SetIdentifiers(style, identifiers);
- }
- int SCI_METHOD DistanceToSecondaryStyles() override {
- return 0;
- }
- const char *SCI_METHOD GetSubStyleBases() override {
- return styleSubable;
- }
-
- static ILexer5 *LexerFactoryPython() {
- return new LexerPython();
- }
-
-private:
- void ProcessLineEnd(StyleContext &sc, std::vector<SingleFStringExpState> &fstringStateStack, SingleFStringExpState *&currentFStringExp, bool &inContinuedString);
-};
-
-Sci_Position SCI_METHOD LexerPython::PropertySet(const char *key, const char *val) {
- if (osPython.PropertySet(&options, key, val)) {
- return 0;
- }
- return -1;
-}
-
-Sci_Position SCI_METHOD LexerPython::WordListSet(int n, const char *wl) {
- WordList *wordListN = nullptr;
- switch (n) {
- case 0:
- wordListN = &keywords;
- break;
- case 1:
- wordListN = &keywords2;
- break;
- }
- Sci_Position firstModification = -1;
- if (wordListN) {
- WordList wlNew;
- wlNew.Set(wl);
- if (*wordListN != wlNew) {
- wordListN->Set(wl);
- firstModification = 0;
- }
- }
- return firstModification;
-}
-
-void LexerPython::ProcessLineEnd(StyleContext &sc, std::vector<SingleFStringExpState> &fstringStateStack, SingleFStringExpState *&currentFStringExp, bool &inContinuedString) {
- long deepestSingleStateIndex = -1;
- unsigned long i;
-
- // Find the deepest single quote state because that string will end; no \ continuation in f-string
- for (i = 0; i < fstringStateStack.size(); i++) {
- if (IsPySingleQuoteStringState(fstringStateStack[i].state)) {
- deepestSingleStateIndex = i;
- break;
- }
- }
-
- if (deepestSingleStateIndex != -1) {
- sc.SetState(fstringStateStack[deepestSingleStateIndex].state);
- while (fstringStateStack.size() > static_cast<unsigned long>(deepestSingleStateIndex)) {
- PopFromStateStack(fstringStateStack, currentFStringExp);
- }
- }
- if (!fstringStateStack.empty()) {
- std::pair<Sci_Position, std::vector<SingleFStringExpState> > val;
- val.first = sc.currentLine;
- val.second = fstringStateStack;
-
- ftripleStateAtEol.insert(val);
- }
-
- if ((sc.state == SCE_P_DEFAULT)
- || IsPyTripleQuoteStringState(sc.state)) {
- // Perform colourisation of white space and triple quoted strings at end of each line to allow
- // tab marking to work inside white space and triple quoted strings
- sc.SetState(sc.state);
- }
- if (IsPySingleQuoteStringState(sc.state)) {
- if (inContinuedString || options.stringsOverNewline) {
- inContinuedString = false;
- } else {
- sc.ChangeState(SCE_P_STRINGEOL);
- sc.ForwardSetState(SCE_P_DEFAULT);
- }
- }
-}
-
-void SCI_METHOD LexerPython::Lex(Sci_PositionU startPos, Sci_Position length, int initStyle, IDocument *pAccess) {
- Accessor styler(pAccess, nullptr);
-
- // Track whether in f-string expression; vector is used for a stack to
- // handle nested f-strings such as f"""{f'''{f"{f'{1}'}"}'''}"""
- std::vector<SingleFStringExpState> fstringStateStack;
- SingleFStringExpState *currentFStringExp = nullptr;
-
- const Sci_Position endPos = startPos + length;
-
- // Backtrack to previous line in case need to fix its tab whinging
- Sci_Position lineCurrent = styler.GetLine(startPos);
- if (startPos > 0) {
- if (lineCurrent > 0) {
- lineCurrent--;
- // Look for backslash-continued lines
- while (lineCurrent > 0) {
- const Sci_Position eolPos = styler.LineStart(lineCurrent) - 1;
- const int eolStyle = styler.StyleAt(eolPos);
- if (eolStyle == SCE_P_STRING
- || eolStyle == SCE_P_CHARACTER
- || eolStyle == SCE_P_STRINGEOL) {
- lineCurrent -= 1;
- } else {
- break;
- }
- }
- startPos = styler.LineStart(lineCurrent);
- }
- initStyle = startPos == 0 ? SCE_P_DEFAULT : styler.StyleAt(startPos - 1);
- }
-
- const literalsAllowed allowedLiterals = options.AllowedLiterals();
-
- initStyle = initStyle & 31;
- if (initStyle == SCE_P_STRINGEOL) {
- initStyle = SCE_P_DEFAULT;
- }
-
- // Set up fstate stack from last line and remove any subsequent ftriple at eol states
- std::map<Sci_Position, std::vector<SingleFStringExpState> >::iterator it;
- it = ftripleStateAtEol.find(lineCurrent - 1);
- if (it != ftripleStateAtEol.end() && !it->second.empty()) {
- fstringStateStack = it->second;
- currentFStringExp = &fstringStateStack.back();
- }
- it = ftripleStateAtEol.lower_bound(lineCurrent);
- if (it != ftripleStateAtEol.end()) {
- ftripleStateAtEol.erase(it, ftripleStateAtEol.end());
- }
-
- kwType kwLast = kwOther;
- int spaceFlags = 0;
- styler.IndentAmount(lineCurrent, &spaceFlags, IsPyComment);
- bool base_n_number = false;
-
- const WordClassifier &classifierIdentifiers = subStyles.Classifier(SCE_P_IDENTIFIER);
-
- StyleContext sc(startPos, endPos - startPos, initStyle, styler);
-
- bool indentGood = true;
- Sci_Position startIndicator = sc.currentPos;
- bool inContinuedString = false;
-
- for (; sc.More(); sc.Forward()) {
-
- if (sc.atLineStart) {
- styler.IndentAmount(lineCurrent, &spaceFlags, IsPyComment);
- indentGood = true;
- if (options.whingeLevel == 1) {
- indentGood = (spaceFlags & wsInconsistent) == 0;
- } else if (options.whingeLevel == 2) {
- indentGood = (spaceFlags & wsSpaceTab) == 0;
- } else if (options.whingeLevel == 3) {
- indentGood = (spaceFlags & wsSpace) == 0;
- } else if (options.whingeLevel == 4) {
- indentGood = (spaceFlags & wsTab) == 0;
- }
- if (!indentGood) {
- styler.IndicatorFill(startIndicator, sc.currentPos, indicatorWhitespace, 0);
- startIndicator = sc.currentPos;
- }
- }
-
- if (sc.atLineEnd) {
- ProcessLineEnd(sc, fstringStateStack, currentFStringExp, inContinuedString);
- lineCurrent++;
- if (!sc.More())
- break;
- }
-
- bool needEOLCheck = false;
-
-
- if (sc.state == SCE_P_OPERATOR) {
- kwLast = kwOther;
- sc.SetState(SCE_P_DEFAULT);
- } else if (sc.state == SCE_P_NUMBER) {
- if (!IsAWordChar(sc.ch, false) &&
- !(!base_n_number && ((sc.ch == '+' || sc.ch == '-') && (sc.chPrev == 'e' || sc.chPrev == 'E')))) {
- sc.SetState(SCE_P_DEFAULT);
- }
- } else if (sc.state == SCE_P_IDENTIFIER) {
- if ((sc.ch == '.') || (!IsAWordChar(sc.ch, options.unicodeIdentifiers))) {
- char s[100];
- sc.GetCurrent(s, sizeof(s));
- int style = SCE_P_IDENTIFIER;
- if ((kwLast == kwImport) && (strcmp(s, "as") == 0)) {
- style = SCE_P_WORD;
- } else if (keywords.InList(s)) {
- style = SCE_P_WORD;
- } else if (kwLast == kwClass) {
- style = SCE_P_CLASSNAME;
- } else if (kwLast == kwDef) {
- style = SCE_P_DEFNAME;
- } else if (kwLast == kwCDef || kwLast == kwCPDef) {
- Sci_Position pos = sc.currentPos;
- unsigned char ch = styler.SafeGetCharAt(pos, '\0');
- while (ch != '\0') {
- if (ch == '(') {
- style = SCE_P_DEFNAME;
- break;
- } else if (ch == ':') {
- style = SCE_P_CLASSNAME;
- break;
- } else if (ch == ' ' || ch == '\t' || ch == '\n' || ch == '\r') {
- pos++;
- ch = styler.SafeGetCharAt(pos, '\0');
- } else {
- break;
- }
- }
- } else if (keywords2.InList(s)) {
- if (options.keywords2NoSubIdentifiers) {
- // We don't want to highlight keywords2
- // that are used as a sub-identifier,
- // i.e. not open in "foo.open".
- const Sci_Position pos = styler.GetStartSegment() - 1;
- if (pos < 0 || (styler.SafeGetCharAt(pos, '\0') != '.'))
- style = SCE_P_WORD2;
- } else {
- style = SCE_P_WORD2;
- }
- } else {
- int subStyle = classifierIdentifiers.ValueFor(s);
- if (subStyle >= 0) {
- style = subStyle;
- }
- }
- sc.ChangeState(style);
- sc.SetState(SCE_P_DEFAULT);
- if (style == SCE_P_WORD) {
- if (0 == strcmp(s, "class"))
- kwLast = kwClass;
- else if (0 == strcmp(s, "def"))
- kwLast = kwDef;
- else if (0 == strcmp(s, "import"))
- kwLast = kwImport;
- else if (0 == strcmp(s, "cdef"))
- kwLast = kwCDef;
- else if (0 == strcmp(s, "cpdef"))
- kwLast = kwCPDef;
- else if (0 == strcmp(s, "cimport"))
- kwLast = kwImport;
- else if (kwLast != kwCDef && kwLast != kwCPDef)
- kwLast = kwOther;
- } else if (kwLast != kwCDef && kwLast != kwCPDef) {
- kwLast = kwOther;
- }
- }
- } else if ((sc.state == SCE_P_COMMENTLINE) || (sc.state == SCE_P_COMMENTBLOCK)) {
- if (sc.ch == '\r' || sc.ch == '\n') {
- sc.SetState(SCE_P_DEFAULT);
- }
- } else if (sc.state == SCE_P_DECORATOR) {
- if (!IsAWordStart(sc.ch, options.unicodeIdentifiers)) {
- sc.SetState(SCE_P_DEFAULT);
- }
- } else if (IsPySingleQuoteStringState(sc.state)) {
- if (sc.ch == '\\') {
- if ((sc.chNext == '\r') && (sc.GetRelative(2) == '\n')) {
- sc.Forward();
- }
- if (sc.chNext == '\n' || sc.chNext == '\r') {
- inContinuedString = true;
- } else {
- // Don't roll over the newline.
- sc.Forward();
- }
- } else if (sc.ch == GetPyStringQuoteChar(sc.state)) {
- sc.ForwardSetState(SCE_P_DEFAULT);
- needEOLCheck = true;
- }
- } else if ((sc.state == SCE_P_TRIPLE) || (sc.state == SCE_P_FTRIPLE)) {
- if (sc.ch == '\\') {
- sc.Forward();
- } else if (sc.Match(R"(''')")) {
- sc.Forward();
- sc.Forward();
- sc.ForwardSetState(SCE_P_DEFAULT);
- needEOLCheck = true;
- }
- } else if ((sc.state == SCE_P_TRIPLEDOUBLE) || (sc.state == SCE_P_FTRIPLEDOUBLE)) {
- if (sc.ch == '\\') {
- sc.Forward();
- } else if (sc.Match(R"(""")")) {
- sc.Forward();
- sc.Forward();
- sc.ForwardSetState(SCE_P_DEFAULT);
- needEOLCheck = true;
- }
- }
-
- // Note if used and not if else because string states also match
- // some of the above clauses
- if (IsPyFStringState(sc.state) && sc.ch == '{') {
- if (sc.chNext == '{') {
- sc.Forward();
- } else {
- PushStateToStack(sc.state, fstringStateStack, currentFStringExp);
- sc.ForwardSetState(SCE_P_DEFAULT);
- }
- needEOLCheck = true;
- }
-
- // If in an f-string expression, check for the ending quote(s)
- // and end f-string to handle syntactically incorrect cases like
- // f'{' and f"""{"""
- if (!fstringStateStack.empty() && (sc.ch == '\'' || sc.ch == '"')) {
- long matching_stack_i = -1;
- for (unsigned long stack_i = 0; stack_i < fstringStateStack.size() && matching_stack_i == -1; stack_i++) {
- const int stack_state = fstringStateStack[stack_i].state;
- const char quote = GetPyStringQuoteChar(stack_state);
- if (sc.ch == quote) {
- if (IsPySingleQuoteStringState(stack_state)) {
- matching_stack_i = stack_i;
- } else if (quote == '"' ? sc.Match(R"(""")") : sc.Match("'''")) {
- matching_stack_i = stack_i;
- }
- }
- }
-
- if (matching_stack_i != -1) {
- sc.SetState(fstringStateStack[matching_stack_i].state);
- if (IsPyTripleQuoteStringState(fstringStateStack[matching_stack_i].state)) {
- sc.Forward();
- sc.Forward();
- }
- sc.ForwardSetState(SCE_P_DEFAULT);
- needEOLCheck = true;
-
- while (fstringStateStack.size() > static_cast<unsigned long>(matching_stack_i)) {
- PopFromStateStack(fstringStateStack, currentFStringExp);
- }
- }
- }
- // End of code to find the end of a state
-
- if (!indentGood && !IsASpaceOrTab(sc.ch)) {
- styler.IndicatorFill(startIndicator, sc.currentPos, indicatorWhitespace, 1);
- startIndicator = sc.currentPos;
- indentGood = true;
- }
-
- // One cdef or cpdef line, clear kwLast only at end of line
- if ((kwLast == kwCDef || kwLast == kwCPDef) && sc.atLineEnd) {
- kwLast = kwOther;
- }
-
- // State exit code may have moved on to end of line
- if (needEOLCheck && sc.atLineEnd) {
- ProcessLineEnd(sc, fstringStateStack, currentFStringExp, inContinuedString);
- lineCurrent++;
- styler.IndentAmount(lineCurrent, &spaceFlags, IsPyComment);
- if (!sc.More())
- break;
- }
-
- // If in f-string expression, check for }, :, ! to resume f-string state or update nesting count
- if (currentFStringExp && !IsPySingleQuoteStringState(sc.state) && !IsPyTripleQuoteStringState(sc.state)) {
- if (currentFStringExp->nestingCount == 0 && (sc.ch == '}' || sc.ch == ':' || (sc.ch == '!' && sc.chNext != '='))) {
- sc.SetState(PopFromStateStack(fstringStateStack, currentFStringExp));
- } else {
- if (sc.ch == '{' || sc.ch == '[' || sc.ch == '(') {
- currentFStringExp->nestingCount++;
- } else if (sc.ch == '}' || sc.ch == ']' || sc.ch == ')') {
- currentFStringExp->nestingCount--;
- }
- }
- }
-
- // Check for a new state starting character
- if (sc.state == SCE_P_DEFAULT) {
- if (IsADigit(sc.ch) || (sc.ch == '.' && IsADigit(sc.chNext))) {
- if (sc.ch == '0' && (sc.chNext == 'x' || sc.chNext == 'X')) {
- base_n_number = true;
- sc.SetState(SCE_P_NUMBER);
- } else if (sc.ch == '0' &&
- (sc.chNext == 'o' || sc.chNext == 'O' || sc.chNext == 'b' || sc.chNext == 'B')) {
- if (options.base2or8Literals) {
- base_n_number = true;
- sc.SetState(SCE_P_NUMBER);
- } else {
- sc.SetState(SCE_P_NUMBER);
- sc.ForwardSetState(SCE_P_IDENTIFIER);
- }
- } else {
- base_n_number = false;
- sc.SetState(SCE_P_NUMBER);
- }
- } else if (isoperator(sc.ch) || sc.ch == '`') {
- sc.SetState(SCE_P_OPERATOR);
- } else if (sc.ch == '#') {
- sc.SetState(sc.chNext == '#' ? SCE_P_COMMENTBLOCK : SCE_P_COMMENTLINE);
- } else if (sc.ch == '@') {
- if (IsFirstNonWhitespace(sc.currentPos, styler))
- sc.SetState(SCE_P_DECORATOR);
- else
- sc.SetState(SCE_P_OPERATOR);
- } else if (IsPyStringStart(sc.ch, sc.chNext, sc.GetRelative(2), allowedLiterals)) {
- Sci_PositionU nextIndex = 0;
- sc.SetState(GetPyStringState(styler, sc.currentPos, &nextIndex, allowedLiterals));
- while (nextIndex > (sc.currentPos + 1) && sc.More()) {
- sc.Forward();
- }
- } else if (IsAWordStart(sc.ch, options.unicodeIdentifiers)) {
- sc.SetState(SCE_P_IDENTIFIER);
- }
- }
- }
- styler.IndicatorFill(startIndicator, sc.currentPos, indicatorWhitespace, 0);
- sc.Complete();
-}
-
-static bool IsCommentLine(Sci_Position line, Accessor &styler) {
- const Sci_Position pos = styler.LineStart(line);
- const Sci_Position eol_pos = styler.LineStart(line + 1) - 1;
- for (Sci_Position i = pos; i < eol_pos; i++) {
- const char ch = styler[i];
- if (ch == '#')
- return true;
- else if (ch != ' ' && ch != '\t')
- return false;
- }
- return false;
-}
-
-static bool IsQuoteLine(Sci_Position line, const Accessor &styler) {
- const int style = styler.StyleAt(styler.LineStart(line)) & 31;
- return IsPyTripleQuoteStringState(style);
-}
-
-
-void SCI_METHOD LexerPython::Fold(Sci_PositionU startPos, Sci_Position length, int /*initStyle - unused*/, IDocument *pAccess) {
- if (!options.fold)
- return;
-
- Accessor styler(pAccess, nullptr);
-
- const Sci_Position maxPos = startPos + length;
- const Sci_Position maxLines = (maxPos == styler.Length()) ? styler.GetLine(maxPos) : styler.GetLine(maxPos - 1); // Requested last line
- const Sci_Position docLines = styler.GetLine(styler.Length()); // Available last line
-
- // Backtrack to previous non-blank line so we can determine indent level
- // for any white space lines (needed esp. within triple quoted strings)
- // and so we can fix any preceding fold level (which is why we go back
- // at least one line in all cases)
- int spaceFlags = 0;
- Sci_Position lineCurrent = styler.GetLine(startPos);
- int indentCurrent = styler.IndentAmount(lineCurrent, &spaceFlags, nullptr);
- while (lineCurrent > 0) {
- lineCurrent--;
- indentCurrent = styler.IndentAmount(lineCurrent, &spaceFlags, nullptr);
- if (!(indentCurrent & SC_FOLDLEVELWHITEFLAG) &&
- (!IsCommentLine(lineCurrent, styler)) &&
- (!IsQuoteLine(lineCurrent, styler)))
- break;
- }
- int indentCurrentLevel = indentCurrent & SC_FOLDLEVELNUMBERMASK;
-
- // Set up initial loop state
- startPos = styler.LineStart(lineCurrent);
- int prev_state = SCE_P_DEFAULT & 31;
- if (lineCurrent >= 1)
- prev_state = styler.StyleAt(startPos - 1) & 31;
- int prevQuote = options.foldQuotes && IsPyTripleQuoteStringState(prev_state);
-
- // Process all characters to end of requested range or end of any triple quote
- //that hangs over the end of the range. Cap processing in all cases
- // to end of document (in case of unclosed quote at end).
- while ((lineCurrent <= docLines) && ((lineCurrent <= maxLines) || prevQuote)) {
-
- // Gather info
- int lev = indentCurrent;
- Sci_Position lineNext = lineCurrent + 1;
- int indentNext = indentCurrent;
- int quote = false;
- if (lineNext <= docLines) {
- // Information about next line is only available if not at end of document
- indentNext = styler.IndentAmount(lineNext, &spaceFlags, nullptr);
- const Sci_Position lookAtPos = (styler.LineStart(lineNext) == styler.Length()) ? styler.Length() - 1 : styler.LineStart(lineNext);
- const int style = styler.StyleAt(lookAtPos) & 31;
- quote = options.foldQuotes && IsPyTripleQuoteStringState(style);
- }
- const int quote_start = (quote && !prevQuote);
- const int quote_continue = (quote && prevQuote);
- if (!quote || !prevQuote)
- indentCurrentLevel = indentCurrent & SC_FOLDLEVELNUMBERMASK;
- if (quote)
- indentNext = indentCurrentLevel;
- if (indentNext & SC_FOLDLEVELWHITEFLAG)
- indentNext = SC_FOLDLEVELWHITEFLAG | indentCurrentLevel;
-
- if (quote_start) {
- // Place fold point at start of triple quoted string
- lev |= SC_FOLDLEVELHEADERFLAG;
- } else if (quote_continue || prevQuote) {
- // Add level to rest of lines in the string
- lev = lev + 1;
- }
-
- // Skip past any blank lines for next indent level info; we skip also
- // comments (all comments, not just those starting in column 0)
- // which effectively folds them into surrounding code rather
- // than screwing up folding. If comments end file, use the min
- // comment indent as the level after
-
- int minCommentLevel = indentCurrentLevel;
- while (!quote &&
- (lineNext < docLines) &&
- ((indentNext & SC_FOLDLEVELWHITEFLAG) ||
- (lineNext <= docLines && IsCommentLine(lineNext, styler)))) {
-
- if (IsCommentLine(lineNext, styler) && indentNext < minCommentLevel) {
- minCommentLevel = indentNext;
- }
-
- lineNext++;
- indentNext = styler.IndentAmount(lineNext, &spaceFlags, nullptr);
- }
-
- const int levelAfterComments = ((lineNext < docLines) ? indentNext & SC_FOLDLEVELNUMBERMASK : minCommentLevel);
- const int levelBeforeComments = std::max(indentCurrentLevel, levelAfterComments);
-
- // Now set all the indent levels on the lines we skipped
- // Do this from end to start. Once we encounter one line
- // which is indented more than the line after the end of
- // the comment-block, use the level of the block before
-
- Sci_Position skipLine = lineNext;
- int skipLevel = levelAfterComments;
-
- while (--skipLine > lineCurrent) {
- const int skipLineIndent = styler.IndentAmount(skipLine, &spaceFlags, nullptr);
-
- if (options.foldCompact) {
- if ((skipLineIndent & SC_FOLDLEVELNUMBERMASK) > levelAfterComments)
- skipLevel = levelBeforeComments;
-
- const int whiteFlag = skipLineIndent & SC_FOLDLEVELWHITEFLAG;
-
- styler.SetLevel(skipLine, skipLevel | whiteFlag);
- } else {
- if ((skipLineIndent & SC_FOLDLEVELNUMBERMASK) > levelAfterComments &&
- !(skipLineIndent & SC_FOLDLEVELWHITEFLAG) &&
- !IsCommentLine(skipLine, styler))
- skipLevel = levelBeforeComments;
-
- styler.SetLevel(skipLine, skipLevel);
- }
- }
-
- // Set fold header on non-quote line
- if (!quote && !(indentCurrent & SC_FOLDLEVELWHITEFLAG)) {
- if ((indentCurrent & SC_FOLDLEVELNUMBERMASK) < (indentNext & SC_FOLDLEVELNUMBERMASK))
- lev |= SC_FOLDLEVELHEADERFLAG;
- }
-
- // Keep track of triple quote state of previous line
- prevQuote = quote;
-
- // Set fold level for this line and move to next line
- styler.SetLevel(lineCurrent, options.foldCompact ? lev : lev & ~SC_FOLDLEVELWHITEFLAG);
- indentCurrent = indentNext;
- lineCurrent = lineNext;
- }
-
- // NOTE: Cannot set level of last line here because indentCurrent doesn't have
- // header flag set; the loop above is crafted to take care of this case!
- //styler.SetLevel(lineCurrent, indentCurrent);
-}
-
-LexerModule lmPython(SCLEX_PYTHON, LexerPython::LexerFactoryPython, "python",
- pythonWordListDesc);
generated by cgit v1.2.3 (git 2.25.1) at 2025-10-12 17:28:16 +0000