416 lines
11 KiB
C++
416 lines
11 KiB
C++
// Scintilla source code edit control
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/**
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* @file LexRegistry.cxx
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* @date July 26 2014
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* @brief Lexer for Windows registration files(.reg)
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* @author nkmathew
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*
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* The License.txt file describes the conditions under which this software may be
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* distributed.
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*
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*/
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#include <cstdlib>
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#include <cassert>
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#include <cctype>
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#include <cstdio>
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#include <string>
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#include <vector>
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#include <map>
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#include "ILexer.h"
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#include "Scintilla.h"
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#include "SciLexer.h"
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#include "WordList.h"
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#include "LexAccessor.h"
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#include "StyleContext.h"
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#include "CharacterSet.h"
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#include "LexerModule.h"
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#include "OptionSet.h"
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#include "DefaultLexer.h"
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using namespace Scintilla;
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static const char *const RegistryWordListDesc[] = {
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0
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};
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struct OptionsRegistry {
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bool foldCompact;
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bool fold;
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OptionsRegistry() {
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foldCompact = false;
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fold = false;
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}
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};
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struct OptionSetRegistry : public OptionSet<OptionsRegistry> {
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OptionSetRegistry() {
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DefineProperty("fold.compact", &OptionsRegistry::foldCompact);
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DefineProperty("fold", &OptionsRegistry::fold);
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DefineWordListSets(RegistryWordListDesc);
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}
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};
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class LexerRegistry : public DefaultLexer {
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OptionsRegistry options;
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OptionSetRegistry optSetRegistry;
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static bool IsStringState(int state) {
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return (state == SCE_REG_VALUENAME || state == SCE_REG_STRING);
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}
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static bool IsKeyPathState(int state) {
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return (state == SCE_REG_ADDEDKEY || state == SCE_REG_DELETEDKEY);
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}
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static bool AtValueType(LexAccessor &styler, Sci_Position start) {
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Sci_Position i = 0;
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while (i < 10) {
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i++;
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char curr = styler.SafeGetCharAt(start+i, '\0');
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if (curr == ':') {
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return true;
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} else if (!curr) {
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return false;
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}
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}
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return false;
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}
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static bool IsNextNonWhitespace(LexAccessor &styler, Sci_Position start, char ch) {
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Sci_Position i = 0;
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while (i < 100) {
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i++;
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char curr = styler.SafeGetCharAt(start+i, '\0');
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char next = styler.SafeGetCharAt(start+i+1, '\0');
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bool atEOL = (curr == '\r' && next != '\n') || (curr == '\n');
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if (curr == ch) {
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return true;
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} else if (!isspacechar(curr) || atEOL) {
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return false;
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}
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}
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return false;
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}
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// Looks for the equal sign at the end of the string
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static bool AtValueName(LexAccessor &styler, Sci_Position start) {
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bool atEOL = false;
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Sci_Position i = 0;
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bool escaped = false;
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while (!atEOL) {
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i++;
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char curr = styler.SafeGetCharAt(start+i, '\0');
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char next = styler.SafeGetCharAt(start+i+1, '\0');
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atEOL = (curr == '\r' && next != '\n') || (curr == '\n');
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if (escaped) {
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escaped = false;
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continue;
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}
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escaped = curr == '\\';
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if (curr == '"') {
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return IsNextNonWhitespace(styler, start+i, '=');
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} else if (!curr) {
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return false;
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}
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}
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return false;
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}
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static bool AtKeyPathEnd(LexAccessor &styler, Sci_Position start) {
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bool atEOL = false;
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Sci_Position i = 0;
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while (!atEOL) {
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i++;
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char curr = styler.SafeGetCharAt(start+i, '\0');
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char next = styler.SafeGetCharAt(start+i+1, '\0');
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atEOL = (curr == '\r' && next != '\n') || (curr == '\n');
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if (curr == ']' || !curr) {
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// There's still at least one or more square brackets ahead
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return false;
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}
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}
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return true;
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}
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static bool AtGUID(LexAccessor &styler, Sci_Position start) {
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int count = 8;
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int portion = 0;
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int offset = 1;
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char digit = '\0';
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while (portion < 5) {
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int i = 0;
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while (i < count) {
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digit = styler.SafeGetCharAt(start+offset);
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if (!(isxdigit(digit) || digit == '-')) {
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return false;
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}
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offset++;
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i++;
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}
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portion++;
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count = (portion == 4) ? 13 : 5;
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}
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digit = styler.SafeGetCharAt(start+offset);
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if (digit == '}') {
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return true;
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} else {
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return false;
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}
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}
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public:
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LexerRegistry() {}
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virtual ~LexerRegistry() {}
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int SCI_METHOD Version() const override {
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return lvRelease4;
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}
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void SCI_METHOD Release() override {
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delete this;
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}
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const char *SCI_METHOD PropertyNames() override {
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return optSetRegistry.PropertyNames();
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}
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int SCI_METHOD PropertyType(const char *name) override {
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return optSetRegistry.PropertyType(name);
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}
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const char *SCI_METHOD DescribeProperty(const char *name) override {
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return optSetRegistry.DescribeProperty(name);
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}
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Sci_Position SCI_METHOD PropertySet(const char *key, const char *val) override {
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if (optSetRegistry.PropertySet(&options, key, val)) {
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return 0;
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}
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return -1;
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}
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Sci_Position SCI_METHOD WordListSet(int, const char *) override {
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return -1;
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}
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void *SCI_METHOD PrivateCall(int, void *) override {
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return 0;
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}
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static ILexer4 *LexerFactoryRegistry() {
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return new LexerRegistry;
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}
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const char *SCI_METHOD DescribeWordListSets() override {
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return optSetRegistry.DescribeWordListSets();
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}
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void SCI_METHOD Lex(Sci_PositionU startPos,
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Sci_Position length,
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int initStyle,
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IDocument *pAccess) override;
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void SCI_METHOD Fold(Sci_PositionU startPos,
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Sci_Position length,
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int initStyle,
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IDocument *pAccess) override;
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};
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void SCI_METHOD LexerRegistry::Lex(Sci_PositionU startPos,
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Sci_Position length,
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int initStyle,
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IDocument *pAccess) {
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int beforeGUID = SCE_REG_DEFAULT;
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int beforeEscape = SCE_REG_DEFAULT;
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CharacterSet setOperators = CharacterSet(CharacterSet::setNone, "-,.=:\\@()");
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LexAccessor styler(pAccess);
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StyleContext context(startPos, length, initStyle, styler);
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bool highlight = true;
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bool afterEqualSign = false;
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while (context.More()) {
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if (context.atLineStart) {
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Sci_Position currPos = static_cast<Sci_Position>(context.currentPos);
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bool continued = styler[currPos-3] == '\\';
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highlight = continued ? true : false;
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}
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switch (context.state) {
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case SCE_REG_COMMENT:
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if (context.atLineEnd) {
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context.SetState(SCE_REG_DEFAULT);
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}
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break;
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case SCE_REG_VALUENAME:
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case SCE_REG_STRING: {
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Sci_Position currPos = static_cast<Sci_Position>(context.currentPos);
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if (context.ch == '"') {
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context.ForwardSetState(SCE_REG_DEFAULT);
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} else if (context.ch == '\\') {
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beforeEscape = context.state;
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context.SetState(SCE_REG_ESCAPED);
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context.Forward();
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} else if (context.ch == '{') {
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if (AtGUID(styler, currPos)) {
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beforeGUID = context.state;
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context.SetState(SCE_REG_STRING_GUID);
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}
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}
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if (context.state == SCE_REG_STRING &&
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context.ch == '%' &&
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(isdigit(context.chNext) || context.chNext == '*')) {
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context.SetState(SCE_REG_PARAMETER);
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}
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}
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break;
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case SCE_REG_PARAMETER:
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context.ForwardSetState(SCE_REG_STRING);
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if (context.ch == '"') {
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context.ForwardSetState(SCE_REG_DEFAULT);
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}
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break;
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case SCE_REG_VALUETYPE:
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if (context.ch == ':') {
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context.SetState(SCE_REG_DEFAULT);
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afterEqualSign = false;
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}
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break;
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case SCE_REG_HEXDIGIT:
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case SCE_REG_OPERATOR:
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context.SetState(SCE_REG_DEFAULT);
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break;
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case SCE_REG_DELETEDKEY:
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case SCE_REG_ADDEDKEY: {
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Sci_Position currPos = static_cast<Sci_Position>(context.currentPos);
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if (context.ch == ']' && AtKeyPathEnd(styler, currPos)) {
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context.ForwardSetState(SCE_REG_DEFAULT);
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} else if (context.ch == '{') {
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if (AtGUID(styler, currPos)) {
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beforeGUID = context.state;
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context.SetState(SCE_REG_KEYPATH_GUID);
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}
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}
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}
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break;
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case SCE_REG_ESCAPED:
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if (context.ch == '"') {
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context.SetState(beforeEscape);
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context.ForwardSetState(SCE_REG_DEFAULT);
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} else if (context.ch == '\\') {
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context.Forward();
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} else {
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context.SetState(beforeEscape);
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beforeEscape = SCE_REG_DEFAULT;
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}
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break;
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case SCE_REG_STRING_GUID:
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case SCE_REG_KEYPATH_GUID: {
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if (context.ch == '}') {
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context.ForwardSetState(beforeGUID);
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beforeGUID = SCE_REG_DEFAULT;
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}
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Sci_Position currPos = static_cast<Sci_Position>(context.currentPos);
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if (context.ch == '"' && IsStringState(context.state)) {
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context.ForwardSetState(SCE_REG_DEFAULT);
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} else if (context.ch == ']' &&
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AtKeyPathEnd(styler, currPos) &&
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IsKeyPathState(context.state)) {
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context.ForwardSetState(SCE_REG_DEFAULT);
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} else if (context.ch == '\\' && IsStringState(context.state)) {
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beforeEscape = context.state;
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context.SetState(SCE_REG_ESCAPED);
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context.Forward();
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}
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}
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break;
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}
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// Determine if a new state should be entered.
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if (context.state == SCE_REG_DEFAULT) {
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Sci_Position currPos = static_cast<Sci_Position>(context.currentPos);
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if (context.ch == ';') {
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context.SetState(SCE_REG_COMMENT);
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} else if (context.ch == '"') {
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if (AtValueName(styler, currPos)) {
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context.SetState(SCE_REG_VALUENAME);
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} else {
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context.SetState(SCE_REG_STRING);
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}
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} else if (context.ch == '[') {
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if (IsNextNonWhitespace(styler, currPos, '-')) {
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context.SetState(SCE_REG_DELETEDKEY);
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} else {
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context.SetState(SCE_REG_ADDEDKEY);
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}
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} else if (context.ch == '=') {
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afterEqualSign = true;
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highlight = true;
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} else if (afterEqualSign) {
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bool wordStart = isalpha(context.ch) && !isalpha(context.chPrev);
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if (wordStart && AtValueType(styler, currPos)) {
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context.SetState(SCE_REG_VALUETYPE);
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}
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} else if (isxdigit(context.ch) && highlight) {
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context.SetState(SCE_REG_HEXDIGIT);
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}
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highlight = (context.ch == '@') ? true : highlight;
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if (setOperators.Contains(context.ch) && highlight) {
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context.SetState(SCE_REG_OPERATOR);
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}
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}
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context.Forward();
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}
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context.Complete();
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}
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// Folding similar to that of FoldPropsDoc in LexOthers
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void SCI_METHOD LexerRegistry::Fold(Sci_PositionU startPos,
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Sci_Position length,
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int,
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IDocument *pAccess) {
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if (!options.fold) {
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return;
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}
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LexAccessor styler(pAccess);
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Sci_Position currLine = styler.GetLine(startPos);
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int visibleChars = 0;
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Sci_PositionU endPos = startPos + length;
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bool atKeyPath = false;
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for (Sci_PositionU i = startPos; i < endPos; i++) {
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atKeyPath = IsKeyPathState(styler.StyleAt(i)) ? true : atKeyPath;
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char curr = styler.SafeGetCharAt(i);
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char next = styler.SafeGetCharAt(i+1);
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bool atEOL = (curr == '\r' && next != '\n') || (curr == '\n');
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if (atEOL || i == (endPos-1)) {
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int level = SC_FOLDLEVELBASE;
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if (currLine > 0) {
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int prevLevel = styler.LevelAt(currLine-1);
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if (prevLevel & SC_FOLDLEVELHEADERFLAG) {
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level += 1;
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} else {
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level = prevLevel;
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}
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}
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if (!visibleChars && options.foldCompact) {
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level |= SC_FOLDLEVELWHITEFLAG;
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} else if (atKeyPath) {
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level = SC_FOLDLEVELBASE | SC_FOLDLEVELHEADERFLAG;
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}
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if (level != styler.LevelAt(currLine)) {
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styler.SetLevel(currLine, level);
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}
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currLine++;
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visibleChars = 0;
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atKeyPath = false;
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}
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if (!isspacechar(curr)) {
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visibleChars++;
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}
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}
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// Make the folding reach the last line in the file
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int level = SC_FOLDLEVELBASE;
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if (currLine > 0) {
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int prevLevel = styler.LevelAt(currLine-1);
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if (prevLevel & SC_FOLDLEVELHEADERFLAG) {
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level += 1;
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} else {
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level = prevLevel;
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}
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}
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styler.SetLevel(currLine, level);
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}
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LexerModule lmRegistry(SCLEX_REGISTRY,
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LexerRegistry::LexerFactoryRegistry,
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"registry",
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RegistryWordListDesc);
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