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-rw-r--r--src/LexRuby.cxx1715
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diff --git a/src/LexRuby.cxx b/src/LexRuby.cxx
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--- a/src/LexRuby.cxx
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-// Scintilla source code edit control
-/** @file LexRuby.cxx
- ** Lexer for Ruby.
- **/
-// Copyright 2001- by Clemens Wyss <wys@helbling.ch>
-// The License.txt file describes the conditions under which this software may be distributed.
-
-#include <stdlib.h>
-#include <string.h>
-#include <ctype.h>
-#include <stdio.h>
-#include <stdarg.h>
-
-#include "Platform.h"
-
-#include "PropSet.h"
-#include "Accessor.h"
-#include "KeyWords.h"
-#include "Scintilla.h"
-#include "SciLexer.h"
-
-#ifdef SCI_NAMESPACE
-using namespace Scintilla;
-#endif
-
-//XXX Identical to Perl, put in common area
-static inline bool isEOLChar(char ch) {
- return (ch == '\r') || (ch == '\n');
-}
-
-#define isSafeASCII(ch) ((unsigned int)(ch) <= 127)
-// This one's redundant, but makes for more readable code
-#define isHighBitChar(ch) ((unsigned int)(ch) > 127)
-
-static inline bool isSafeAlpha(char ch) {
- return (isSafeASCII(ch) && isalpha(ch)) || ch == '_';
-}
-
-static inline bool isSafeAlnum(char ch) {
- return (isSafeASCII(ch) && isalnum(ch)) || ch == '_';
-}
-
-static inline bool isSafeAlnumOrHigh(char ch) {
- return isHighBitChar(ch) || isalnum(ch) || ch == '_';
-}
-
-static inline bool isSafeDigit(char ch) {
- return isSafeASCII(ch) && isdigit(ch);
-}
-
-static inline bool isSafeWordcharOrHigh(char ch) {
- // Error: scintilla's KeyWords.h includes '.' as a word-char
- // we want to separate things that can take methods from the
- // methods.
- return isHighBitChar(ch) || isalnum(ch) || ch == '_';
-}
-
-static bool inline iswhitespace(char ch) {
- return ch == ' ' || ch == '\t';
-}
-
-#define MAX_KEYWORD_LENGTH 200
-
-#define STYLE_MASK 63
-#define actual_style(style) (style & STYLE_MASK)
-
-static bool followsDot(unsigned int pos, Accessor &styler) {
- styler.Flush();
- for (; pos >= 1; --pos) {
- int style = actual_style(styler.StyleAt(pos));
- char ch;
- switch (style) {
- case SCE_RB_DEFAULT:
- ch = styler[pos];
- if (ch == ' ' || ch == '\t') {
- //continue
- } else {
- return false;
- }
- break;
-
- case SCE_RB_OPERATOR:
- return styler[pos] == '.';
-
- default:
- return false;
- }
- }
- return false;
-}
-
-// Forward declarations
-static bool keywordIsAmbiguous(const char *prevWord);
-static bool keywordDoStartsLoop(int pos,
- Accessor &styler);
-static bool keywordIsModifier(const char *word,
- int pos,
- Accessor &styler);
-
-static int ClassifyWordRb(unsigned int start, unsigned int end, WordList &keywords, Accessor &styler, char *prevWord) {
- char s[MAX_KEYWORD_LENGTH];
- unsigned int i, j;
- unsigned int lim = end - start + 1; // num chars to copy
- if (lim >= MAX_KEYWORD_LENGTH) {
- lim = MAX_KEYWORD_LENGTH - 1;
- }
- for (i = start, j = 0; j < lim; i++, j++) {
- s[j] = styler[i];
- }
- s[j] = '\0';
- int chAttr;
- if (0 == strcmp(prevWord, "class"))
- chAttr = SCE_RB_CLASSNAME;
- else if (0 == strcmp(prevWord, "module"))
- chAttr = SCE_RB_MODULE_NAME;
- else if (0 == strcmp(prevWord, "def"))
- chAttr = SCE_RB_DEFNAME;
- else if (keywords.InList(s) && !followsDot(start - 1, styler)) {
- if (keywordIsAmbiguous(s)
- && keywordIsModifier(s, start, styler)) {
-
- // Demoted keywords are colored as keywords,
- // but do not affect changes in indentation.
- //
- // Consider the word 'if':
- // 1. <<if test ...>> : normal
- // 2. <<stmt if test>> : demoted
- // 3. <<lhs = if ...>> : normal: start a new indent level
- // 4. <<obj.if = 10>> : color as identifer, since it follows '.'
-
- chAttr = SCE_RB_WORD_DEMOTED;
- } else {
- chAttr = SCE_RB_WORD;
- }
- } else
- chAttr = SCE_RB_IDENTIFIER;
- styler.ColourTo(end, chAttr);
- if (chAttr == SCE_RB_WORD) {
- strcpy(prevWord, s);
- } else {
- prevWord[0] = 0;
- }
- return chAttr;
-}
-
-
-//XXX Identical to Perl, put in common area
-static bool isMatch(Accessor &styler, int lengthDoc, int pos, const char *val) {
- if ((pos + static_cast<int>(strlen(val))) >= lengthDoc) {
- return false;
- }
- while (*val) {
- if (*val != styler[pos++]) {
- return false;
- }
- val++;
- }
- return true;
-}
-
-// Do Ruby better -- find the end of the line, work back,
-// and then check for leading white space
-
-// Precondition: the here-doc target can be indented
-static bool lookingAtHereDocDelim(Accessor &styler,
- int pos,
- int lengthDoc,
- const char *HereDocDelim)
-{
- if (!isMatch(styler, lengthDoc, pos, HereDocDelim)) {
- return false;
- }
- while (--pos > 0) {
- char ch = styler[pos];
- if (isEOLChar(ch)) {
- return true;
- } else if (ch != ' ' && ch != '\t') {
- return false;
- }
- }
- return false;
-}
-
-//XXX Identical to Perl, put in common area
-static char opposite(char ch) {
- if (ch == '(')
- return ')';
- if (ch == '[')
- return ']';
- if (ch == '{')
- return '}';
- if (ch == '<')
- return '>';
- return ch;
-}
-
-// Null transitions when we see we've reached the end
-// and need to relex the curr char.
-
-static void redo_char(int &i, char &ch, char &chNext, char &chNext2,
- int &state) {
- i--;
- chNext2 = chNext;
- chNext = ch;
- state = SCE_RB_DEFAULT;
-}
-
-static void advance_char(int &i, char &ch, char &chNext, char &chNext2) {
- i++;
- ch = chNext;
- chNext = chNext2;
-}
-
-// precondition: startPos points to one after the EOL char
-static bool currLineContainsHereDelims(int& startPos,
- Accessor &styler) {
- if (startPos <= 1)
- return false;
-
- int pos;
- for (pos = startPos - 1; pos > 0; pos--) {
- char ch = styler.SafeGetCharAt(pos);
- if (isEOLChar(ch)) {
- // Leave the pointers where they are -- there are no
- // here doc delims on the current line, even if
- // the EOL isn't default style
-
- return false;
- } else {
- styler.Flush();
- if (actual_style(styler.StyleAt(pos)) == SCE_RB_HERE_DELIM) {
- break;
- }
- }
- }
- if (pos == 0) {
- return false;
- }
- // Update the pointers so we don't have to re-analyze the string
- startPos = pos;
- return true;
-}
-
-// This class is used by the enter and exit methods, so it needs
-// to be hoisted out of the function.
-
-class QuoteCls {
- public:
- int Count;
- char Up;
- char Down;
- QuoteCls() {
- this->New();
- }
- void New() {
- Count = 0;
- Up = '\0';
- Down = '\0';
- }
- void Open(char u) {
- Count++;
- Up = u;
- Down = opposite(Up);
- }
- QuoteCls(const QuoteCls& q) {
- // copy constructor -- use this for copying in
- Count = q.Count;
- Up = q.Up;
- Down = q.Down;
- }
- QuoteCls& operator=(const QuoteCls& q) { // assignment constructor
- if (this != &q) {
- Count = q.Count;
- Up = q.Up;
- Down = q.Down;
- }
- return *this;
- }
-
-};
-
-
-static void enterInnerExpression(int *p_inner_string_types,
- int *p_inner_expn_brace_counts,
- QuoteCls *p_inner_quotes,
- int& inner_string_count,
- int& state,
- int& brace_counts,
- QuoteCls curr_quote
- ) {
- p_inner_string_types[inner_string_count] = state;
- state = SCE_RB_DEFAULT;
- p_inner_expn_brace_counts[inner_string_count] = brace_counts;
- brace_counts = 0;
- p_inner_quotes[inner_string_count] = curr_quote;
- ++inner_string_count;
-}
-
-static void exitInnerExpression(int *p_inner_string_types,
- int *p_inner_expn_brace_counts,
- QuoteCls *p_inner_quotes,
- int& inner_string_count,
- int& state,
- int& brace_counts,
- QuoteCls& curr_quote
- ) {
- --inner_string_count;
- state = p_inner_string_types[inner_string_count];
- brace_counts = p_inner_expn_brace_counts[inner_string_count];
- curr_quote = p_inner_quotes[inner_string_count];
-}
-
-static bool isEmptyLine(int pos,
- Accessor &styler) {
- int spaceFlags = 0;
- int lineCurrent = styler.GetLine(pos);
- int indentCurrent = styler.IndentAmount(lineCurrent, &spaceFlags, NULL);
- return (indentCurrent & SC_FOLDLEVELWHITEFLAG) != 0;
-}
-
-static bool RE_CanFollowKeyword(const char *keyword) {
- if (!strcmp(keyword, "and")
- || !strcmp(keyword, "begin")
- || !strcmp(keyword, "break")
- || !strcmp(keyword, "case")
- || !strcmp(keyword, "do")
- || !strcmp(keyword, "else")
- || !strcmp(keyword, "elsif")
- || !strcmp(keyword, "if")
- || !strcmp(keyword, "next")
- || !strcmp(keyword, "return")
- || !strcmp(keyword, "when")
- || !strcmp(keyword, "unless")
- || !strcmp(keyword, "until")
- || !strcmp(keyword, "not")
- || !strcmp(keyword, "or")) {
- return true;
- }
- return false;
-}
-
-// Look at chars up to but not including endPos
-// Don't look at styles in case we're looking forward
-
-static int skipWhitespace(int startPos,
- int endPos,
- Accessor &styler) {
- for (int i = startPos; i < endPos; i++) {
- if (!iswhitespace(styler[i])) {
- return i;
- }
- }
- return endPos;
-}
-
-// This routine looks for false positives like
-// undef foo, <<
-// There aren't too many.
-//
-// iPrev points to the start of <<
-
-static bool sureThisIsHeredoc(int iPrev,
- Accessor &styler,
- char *prevWord) {
-
- // Not so fast, since Ruby's so dynamic. Check the context
- // to make sure we're OK.
- int prevStyle;
- int lineStart = styler.GetLine(iPrev);
- int lineStartPosn = styler.LineStart(lineStart);
- styler.Flush();
-
- // Find the first word after some whitespace
- int firstWordPosn = skipWhitespace(lineStartPosn, iPrev, styler);
- if (firstWordPosn >= iPrev) {
- // Have something like {^ <<}
- //XXX Look at the first previous non-comment non-white line
- // to establish the context. Not too likely though.
- return true;
- } else {
- switch (prevStyle = styler.StyleAt(firstWordPosn)) {
- case SCE_RB_WORD:
- case SCE_RB_WORD_DEMOTED:
- case SCE_RB_IDENTIFIER:
- break;
- default:
- return true;
- }
- }
- int firstWordEndPosn = firstWordPosn;
- char *dst = prevWord;
- for (;;) {
- if (firstWordEndPosn >= iPrev ||
- styler.StyleAt(firstWordEndPosn) != prevStyle) {
- *dst = 0;
- break;
- }
- *dst++ = styler[firstWordEndPosn];
- firstWordEndPosn += 1;
- }
- //XXX Write a style-aware thing to regex scintilla buffer objects
- if (!strcmp(prevWord, "undef")
- || !strcmp(prevWord, "def")
- || !strcmp(prevWord, "alias")) {
- // These keywords are what we were looking for
- return false;
- }
- return true;
-}
-
-// Routine that saves us from allocating a buffer for the here-doc target
-// targetEndPos points one past the end of the current target
-static bool haveTargetMatch(int currPos,
- int lengthDoc,
- int targetStartPos,
- int targetEndPos,
- Accessor &styler) {
- if (lengthDoc - currPos < targetEndPos - targetStartPos) {
- return false;
- }
- int i, j;
- for (i = targetStartPos, j = currPos;
- i < targetEndPos && j < lengthDoc;
- i++, j++) {
- if (styler[i] != styler[j]) {
- return false;
- }
- }
- return true;
-}
-
-// We need a check because the form
-// [identifier] <<[target]
-// is ambiguous. The Ruby lexer/parser resolves it by
-// looking to see if [identifier] names a variable or a
-// function. If it's the first, it's the start of a here-doc.
-// If it's a var, it's an operator. This lexer doesn't
-// maintain a symbol table, so it looks ahead to see what's
-// going on, in cases where we have
-// ^[white-space]*[identifier([.|::]identifier)*][white-space]*<<[target]
-//
-// If there's no occurrence of [target] on a line, assume we don't.
-
-// return true == yes, we have no heredocs
-
-static bool sureThisIsNotHeredoc(int lt2StartPos,
- Accessor &styler) {
- int prevStyle;
- // Use full document, not just part we're styling
- int lengthDoc = styler.Length();
- int lineStart = styler.GetLine(lt2StartPos);
- int lineStartPosn = styler.LineStart(lineStart);
- styler.Flush();
- const bool definitely_not_a_here_doc = true;
- const bool looks_like_a_here_doc = false;
-
- // Find the first word after some whitespace
- int firstWordPosn = skipWhitespace(lineStartPosn, lt2StartPos, styler);
- if (firstWordPosn >= lt2StartPos) {
- return definitely_not_a_here_doc;
- }
- prevStyle = styler.StyleAt(firstWordPosn);
- // If we have '<<' following a keyword, it's not a heredoc
- if (prevStyle != SCE_RB_IDENTIFIER) {
- return definitely_not_a_here_doc;
- }
- int newStyle = prevStyle;
- // Some compilers incorrectly warn about uninit newStyle
- for (firstWordPosn += 1; firstWordPosn <= lt2StartPos; firstWordPosn += 1) {
- // Inner loop looks at the name
- for (; firstWordPosn <= lt2StartPos; firstWordPosn += 1) {
- newStyle = styler.StyleAt(firstWordPosn);
- if (newStyle != prevStyle) {
- break;
- }
- }
- // Do we have '::' or '.'?
- if (firstWordPosn < lt2StartPos && newStyle == SCE_RB_OPERATOR) {
- char ch = styler[firstWordPosn];
- if (ch == '.') {
- // yes
- } else if (ch == ':') {
- if (styler.StyleAt(++firstWordPosn) != SCE_RB_OPERATOR) {
- return definitely_not_a_here_doc;
- } else if (styler[firstWordPosn] != ':') {
- return definitely_not_a_here_doc;
- }
- } else {
- break;
- }
- } else {
- break;
- }
- }
- // Skip next batch of white-space
- firstWordPosn = skipWhitespace(firstWordPosn, lt2StartPos, styler);
- if (firstWordPosn != lt2StartPos) {
- // Have [[^ws[identifier]ws[*something_else*]ws<<
- return definitely_not_a_here_doc;
- }
- // OK, now 'j' will point to the current spot moving ahead
- int j = firstWordPosn + 1;
- if (styler.StyleAt(j) != SCE_RB_OPERATOR || styler[j] != '<') {
- // This shouldn't happen
- return definitely_not_a_here_doc;
- }
- int nextLineStartPosn = styler.LineStart(lineStart + 1);
- if (nextLineStartPosn >= lengthDoc) {
- return definitely_not_a_here_doc;
- }
- j = skipWhitespace(j + 1, nextLineStartPosn, styler);
- if (j >= lengthDoc) {
- return definitely_not_a_here_doc;
- }
- bool allow_indent;
- int target_start, target_end;
- // From this point on no more styling, since we're looking ahead
- if (styler[j] == '-') {
- allow_indent = true;
- j++;
- } else {
- allow_indent = false;
- }
-
- // Allow for quoted targets.
- char target_quote = 0;
- switch (styler[j]) {
- case '\'':
- case '"':
- case '`':
- target_quote = styler[j];
- j += 1;
- }
-
- if (isSafeAlnum(styler[j])) {
- // Init target_end because some compilers think it won't
- // be initialized by the time it's used
- target_start = target_end = j;
- j++;
- } else {
- return definitely_not_a_here_doc;
- }
- for (; j < lengthDoc; j++) {
- if (!isSafeAlnum(styler[j])) {
- if (target_quote && styler[j] != target_quote) {
- // unquoted end
- return definitely_not_a_here_doc;
- }
-
- // And for now make sure that it's a newline
- // don't handle arbitrary expressions yet
-
- target_end = j;
- if (target_quote) {
- // Now we can move to the character after the string delimiter.
- j += 1;
- }
- j = skipWhitespace(j, lengthDoc, styler);
- if (j >= lengthDoc) {
- return definitely_not_a_here_doc;
- } else {
- char ch = styler[j];
- if (ch == '#' || isEOLChar(ch)) {
- // This is OK, so break and continue;
- break;
- } else {
- return definitely_not_a_here_doc;
- }
- }
- }
- }
-
- // Just look at the start of each line
- int last_line = styler.GetLine(lengthDoc - 1);
- // But don't go too far
- if (last_line > lineStart + 50) {
- last_line = lineStart + 50;
- }
- for (int line_num = lineStart + 1; line_num <= last_line; line_num++) {
- if (allow_indent) {
- j = skipWhitespace(styler.LineStart(line_num), lengthDoc, styler);
- } else {
- j = styler.LineStart(line_num);
- }
- // target_end is one past the end
- if (haveTargetMatch(j, lengthDoc, target_start, target_end, styler)) {
- // We got it
- return looks_like_a_here_doc;
- }
- }
- return definitely_not_a_here_doc;
-}
-
-//todo: if we aren't looking at a stdio character,
-// move to the start of the first line that is not in a
-// multi-line construct
-
-static void synchronizeDocStart(unsigned int& startPos,
- int &length,
- int &initStyle,
- Accessor &styler,
- bool skipWhiteSpace=false) {
-
- styler.Flush();
- int style = actual_style(styler.StyleAt(startPos));
- switch (style) {
- case SCE_RB_STDIN:
- case SCE_RB_STDOUT:
- case SCE_RB_STDERR:
- // Don't do anything else with these.
- return;
- }
-
- int pos = startPos;
- // Quick way to characterize each line
- int lineStart;
- for (lineStart = styler.GetLine(pos); lineStart > 0; lineStart--) {
- // Now look at the style before the previous line's EOL
- pos = styler.LineStart(lineStart) - 1;
- if (pos <= 10) {
- lineStart = 0;
- break;
- }
- char ch = styler.SafeGetCharAt(pos);
- char chPrev = styler.SafeGetCharAt(pos - 1);
- if (ch == '\n' && chPrev == '\r') {
- pos--;
- }
- if (styler.SafeGetCharAt(pos - 1) == '\\') {
- // Continuation line -- keep going
- } else if (actual_style(styler.StyleAt(pos)) != SCE_RB_DEFAULT) {
- // Part of multi-line construct -- keep going
- } else if (currLineContainsHereDelims(pos, styler)) {
- // Keep going, with pos and length now pointing
- // at the end of the here-doc delimiter
- } else if (skipWhiteSpace && isEmptyLine(pos, styler)) {
- // Keep going
- } else {
- break;
- }
- }
- pos = styler.LineStart(lineStart);
- length += (startPos - pos);
- startPos = pos;
- initStyle = SCE_RB_DEFAULT;
-}
-
-static void ColouriseRbDoc(unsigned int startPos, int length, int initStyle,
- WordList *keywordlists[], Accessor &styler) {
-
- // Lexer for Ruby often has to backtrack to start of current style to determine
- // which characters are being used as quotes, how deeply nested is the
- // start position and what the termination string is for here documents
-
- WordList &keywords = *keywordlists[0];
-
- class HereDocCls {
- public:
- int State;
- // States
- // 0: '<<' encountered
- // 1: collect the delimiter
- // 1b: text between the end of the delimiter and the EOL
- // 2: here doc text (lines after the delimiter)
- char Quote; // the char after '<<'
- bool Quoted; // true if Quote in ('\'','"','`')
- int DelimiterLength; // strlen(Delimiter)
- char Delimiter[256]; // the Delimiter, limit of 256: from Perl
- bool CanBeIndented;
- HereDocCls() {
- State = 0;
- DelimiterLength = 0;
- Delimiter[0] = '\0';
- CanBeIndented = false;
- }
- };
- HereDocCls HereDoc;
-
- QuoteCls Quote;
-
- int numDots = 0; // For numbers --
- // Don't start lexing in the middle of a num
-
- synchronizeDocStart(startPos, length, initStyle, styler, // ref args
- false);
-
- bool preferRE = true;
- int state = initStyle;
- int lengthDoc = startPos + length;
-
- char prevWord[MAX_KEYWORD_LENGTH + 1]; // 1 byte for zero
- prevWord[0] = '\0';
- if (length == 0)
- return;
-
- char chPrev = styler.SafeGetCharAt(startPos - 1);
- char chNext = styler.SafeGetCharAt(startPos);
- bool is_real_number = true; // Differentiate between constants and ?-sequences.
- // Ruby uses a different mask because bad indentation is marked by oring with 32
- styler.StartAt(startPos, 127);
- styler.StartSegment(startPos);
-
- static int q_states[] = {SCE_RB_STRING_Q,
- SCE_RB_STRING_QQ,
- SCE_RB_STRING_QR,
- SCE_RB_STRING_QW,
- SCE_RB_STRING_QW,
- SCE_RB_STRING_QX};
- static const char* q_chars = "qQrwWx";
-
- // In most cases a value of 2 should be ample for the code in the
- // Ruby library, and the code the user is likely to enter.
- // For example,
- // fu_output_message "mkdir #{options[:mode] ? ('-m %03o ' % options[:mode]) : ''}#{list.join ' '}"
- // if options[:verbose]
- // from fileutils.rb nests to a level of 2
- // If the user actually hits a 6th occurrence of '#{' in a double-quoted
- // string (including regex'es, %Q, %<sym>, %w, and other strings
- // that interpolate), it will stay as a string. The problem with this
- // is that quotes might flip, a 7th '#{' will look like a comment,
- // and code-folding might be wrong.
-
- // If anyone runs into this problem, I recommend raising this
- // value slightly higher to replacing the fixed array with a linked
- // list. Keep in mind this code will be called everytime the lexer
- // is invoked.
-
-#define INNER_STRINGS_MAX_COUNT 5
- // These vars track our instances of "...#{,,,%Q<..#{,,,}...>,,,}..."
- int inner_string_types[INNER_STRINGS_MAX_COUNT];
- // Track # braces when we push a new #{ thing
- int inner_expn_brace_counts[INNER_STRINGS_MAX_COUNT];
- QuoteCls inner_quotes[INNER_STRINGS_MAX_COUNT];
- int inner_string_count = 0;
- int brace_counts = 0; // Number of #{ ... } things within an expression
-
- int i;
- for (i = 0; i < INNER_STRINGS_MAX_COUNT; i++) {
- inner_string_types[i] = 0;
- inner_expn_brace_counts[i] = 0;
- }
- for (i = startPos; i < lengthDoc; i++) {
- char ch = chNext;
- chNext = styler.SafeGetCharAt(i + 1);
- char chNext2 = styler.SafeGetCharAt(i + 2);
-
- if (styler.IsLeadByte(ch)) {
- chNext = chNext2;
- chPrev = ' ';
- i += 1;
- continue;
- }
-
- // skip on DOS/Windows
- //No, don't, because some things will get tagged on,
- // so we won't recognize keywords, for example
-#if 0
- if (ch == '\r' && chNext == '\n') {
- continue;
- }
-#endif
-
- if (HereDoc.State == 1 && isEOLChar(ch)) {
- // Begin of here-doc (the line after the here-doc delimiter):
- HereDoc.State = 2;
- styler.ColourTo(i-1, state);
- // Don't check for a missing quote, just jump into
- // the here-doc state
- state = SCE_RB_HERE_Q;
- }
-
- // Regular transitions
- if (state == SCE_RB_DEFAULT) {
- if (isSafeDigit(ch)) {
- styler.ColourTo(i - 1, state);
- state = SCE_RB_NUMBER;
- is_real_number = true;
- numDots = 0;
- } else if (isHighBitChar(ch) || iswordstart(ch)) {
- styler.ColourTo(i - 1, state);
- state = SCE_RB_WORD;
- } else if (ch == '#') {
- styler.ColourTo(i - 1, state);
- state = SCE_RB_COMMENTLINE;
- } else if (ch == '=') {
- // =begin indicates the start of a comment (doc) block
- if (i == 0 || (isEOLChar(chPrev)
- && chNext == 'b'
- && styler.SafeGetCharAt(i + 2) == 'e'
- && styler.SafeGetCharAt(i + 3) == 'g'
- && styler.SafeGetCharAt(i + 4) == 'i'
- && styler.SafeGetCharAt(i + 5) == 'n'
- && !isSafeWordcharOrHigh(styler.SafeGetCharAt(i + 6)))) {
- styler.ColourTo(i - 1, state);
- state = SCE_RB_POD;
- } else {
- styler.ColourTo(i - 1, state);
- styler.ColourTo(i, SCE_RB_OPERATOR);
- preferRE = true;
- }
- } else if (ch == '"') {
- styler.ColourTo(i - 1, state);
- state = SCE_RB_STRING;
- Quote.New();
- Quote.Open(ch);
- } else if (ch == '\'') {
- styler.ColourTo(i - 1, state);
- state = SCE_RB_CHARACTER;
- Quote.New();
- Quote.Open(ch);
- } else if (ch == '`') {
- styler.ColourTo(i - 1, state);
- state = SCE_RB_BACKTICKS;
- Quote.New();
- Quote.Open(ch);
- } else if (ch == '@') {
- // Instance or class var
- styler.ColourTo(i - 1, state);
- if (chNext == '@') {
- state = SCE_RB_CLASS_VAR;
- advance_char(i, ch, chNext, chNext2); // pass by ref
- } else {
- state = SCE_RB_INSTANCE_VAR;
- }
- } else if (ch == '$') {
- // Check for a builtin global
- styler.ColourTo(i - 1, state);
- // Recognize it bit by bit
- state = SCE_RB_GLOBAL;
- } else if (ch == '/' && preferRE) {
- // Ambigous operator
- styler.ColourTo(i - 1, state);
- state = SCE_RB_REGEX;
- Quote.New();
- Quote.Open(ch);
- } else if (ch == '<' && chNext == '<' && chNext2 != '=') {
-
- // Recognise the '<<' symbol - either a here document or a binary op
- styler.ColourTo(i - 1, state);
- i++;
- chNext = chNext2;
- styler.ColourTo(i, SCE_RB_OPERATOR);
-
- if (! (strchr("\"\'`_-", chNext2) || isSafeAlpha(chNext2))) {
- // It's definitely not a here-doc,
- // based on Ruby's lexer/parser in the
- // heredoc_identifier routine.
- // Nothing else to do.
- } else if (preferRE) {
- if (sureThisIsHeredoc(i - 1, styler, prevWord)) {
- state = SCE_RB_HERE_DELIM;
- HereDoc.State = 0;
- }
- // else leave it in default state
- } else {
- if (sureThisIsNotHeredoc(i - 1, styler)) {
- // leave state as default
- // We don't have all the heuristics Perl has for indications
- // of a here-doc, because '<<' is overloadable and used
- // for so many other classes.
- } else {
- state = SCE_RB_HERE_DELIM;
- HereDoc.State = 0;
- }
- }
- preferRE = (state != SCE_RB_HERE_DELIM);
- } else if (ch == ':') {
- styler.ColourTo(i - 1, state);
- if (chNext == ':') {
- // Mark "::" as an operator, not symbol start
- styler.ColourTo(i + 1, SCE_RB_OPERATOR);
- advance_char(i, ch, chNext, chNext2); // pass by ref
- state = SCE_RB_DEFAULT;
- preferRE = false;
- } else if (isSafeWordcharOrHigh(chNext)) {
- state = SCE_RB_SYMBOL;
- } else if (strchr("[*!~+-*/%=<>&^|", chNext)) {
- // Do the operator analysis in-line, looking ahead
- // Based on the table in pickaxe 2nd ed., page 339
- bool doColoring = true;
- switch (chNext) {
- case '[':
- if (chNext2 == ']' ) {
- char ch_tmp = styler.SafeGetCharAt(i + 3);
- if (ch_tmp == '=') {
- i += 3;
- ch = ch_tmp;
- chNext = styler.SafeGetCharAt(i + 1);
- } else {
- i += 2;
- ch = chNext2;
- chNext = ch_tmp;
- }
- } else {
- doColoring = false;
- }
- break;
-
- case '*':
- if (chNext2 == '*') {
- i += 2;
- ch = chNext2;
- chNext = styler.SafeGetCharAt(i + 1);
- } else {
- advance_char(i, ch, chNext, chNext2);
- }
- break;
-
- case '!':
- if (chNext2 == '=' || chNext2 == '~') {
- i += 2;
- ch = chNext2;
- chNext = styler.SafeGetCharAt(i + 1);
- } else {
- advance_char(i, ch, chNext, chNext2);
- }
- break;
-
- case '<':
- if (chNext2 == '<') {
- i += 2;
- ch = chNext2;
- chNext = styler.SafeGetCharAt(i + 1);
- } else if (chNext2 == '=') {
- char ch_tmp = styler.SafeGetCharAt(i + 3);
- if (ch_tmp == '>') { // <=> operator
- i += 3;
- ch = ch_tmp;
- chNext = styler.SafeGetCharAt(i + 1);
- } else {
- i += 2;
- ch = chNext2;
- chNext = ch_tmp;
- }
- } else {
- advance_char(i, ch, chNext, chNext2);
- }
- break;
-
- default:
- // Simple one-character operators
- advance_char(i, ch, chNext, chNext2);
- break;
- }
- if (doColoring) {
- styler.ColourTo(i, SCE_RB_SYMBOL);
- state = SCE_RB_DEFAULT;
- }
- } else if (!preferRE) {
- // Don't color symbol strings (yet)
- // Just color the ":" and color rest as string
- styler.ColourTo(i, SCE_RB_SYMBOL);
- state = SCE_RB_DEFAULT;
- } else {
- styler.ColourTo(i, SCE_RB_OPERATOR);
- state = SCE_RB_DEFAULT;
- preferRE = true;
- }
- } else if (ch == '%') {
- styler.ColourTo(i - 1, state);
- bool have_string = false;
- if (strchr(q_chars, chNext) && !isSafeWordcharOrHigh(chNext2)) {
- Quote.New();
- const char *hit = strchr(q_chars, chNext);
- if (hit != NULL) {
- state = q_states[hit - q_chars];
- Quote.Open(chNext2);
- i += 2;
- ch = chNext2;
- chNext = styler.SafeGetCharAt(i + 1);
- have_string = true;
- }
- } else if (preferRE && !isSafeWordcharOrHigh(chNext)) {
- // Ruby doesn't allow high bit chars here,
- // but the editor host might
- state = SCE_RB_STRING_QQ;
- Quote.Open(chNext);
- advance_char(i, ch, chNext, chNext2); // pass by ref
- have_string = true;
- }
- if (!have_string) {
- styler.ColourTo(i, SCE_RB_OPERATOR);
- // stay in default
- preferRE = true;
- }
- } else if (ch == '?') {
- styler.ColourTo(i - 1, state);
- if (iswhitespace(chNext) || chNext == '\n' || chNext == '\r') {
- styler.ColourTo(i, SCE_RB_OPERATOR);
- } else {
- // It's the start of a character code escape sequence
- // Color it as a number.
- state = SCE_RB_NUMBER;
- is_real_number = false;
- }
- } else if (isoperator(ch) || ch == '.') {
- styler.ColourTo(i - 1, state);
- styler.ColourTo(i, SCE_RB_OPERATOR);
- // If we're ending an expression or block,
- // assume it ends an object, and the ambivalent
- // constructs are binary operators
- //
- // So if we don't have one of these chars,
- // we aren't ending an object exp'n, and ops
- // like : << / are unary operators.
-
- if (ch == '{') {
- ++brace_counts;
- preferRE = true;
- } else if (ch == '}' && --brace_counts < 0
- && inner_string_count > 0) {
- styler.ColourTo(i, SCE_RB_OPERATOR);
- exitInnerExpression(inner_string_types,
- inner_expn_brace_counts,
- inner_quotes,
- inner_string_count,
- state, brace_counts, Quote);
- } else {
- preferRE = (strchr(")}].", ch) == NULL);
- }
- // Stay in default state
- } else if (isEOLChar(ch)) {
- // Make sure it's a true line-end, with no backslash
- if ((ch == '\r' || (ch == '\n' && chPrev != '\r'))
- && chPrev != '\\') {
- // Assume we've hit the end of the statement.
- preferRE = true;
- }
- }
- } else if (state == SCE_RB_WORD) {
- if (ch == '.' || !isSafeWordcharOrHigh(ch)) {
- // Words include x? in all contexts,
- // and <letters>= after either 'def' or a dot
- // Move along until a complete word is on our left
-
- // Default accessor treats '.' as word-chars,
- // but we don't for now.
-
- if (ch == '='
- && isSafeWordcharOrHigh(chPrev)
- && (chNext == '('
- || strchr(" \t\n\r", chNext) != NULL)
- && (!strcmp(prevWord, "def")
- || followsDot(styler.GetStartSegment(), styler))) {
- // <name>= is a name only when being def'd -- Get it the next time
- // This means that <name>=<name> is always lexed as
- // <name>, (op, =), <name>
- } else if ((ch == '?' || ch == '!')
- && isSafeWordcharOrHigh(chPrev)
- && !isSafeWordcharOrHigh(chNext)) {
- // <name>? is a name -- Get it the next time
- // But <name>?<name> is always lexed as
- // <name>, (op, ?), <name>
- // Same with <name>! to indicate a method that
- // modifies its target
- } else if (isEOLChar(ch)
- && isMatch(styler, lengthDoc, i - 7, "__END__")) {
- styler.ColourTo(i, SCE_RB_DATASECTION);
- state = SCE_RB_DATASECTION;
- // No need to handle this state -- we'll just move to the end
- preferRE = false;
- } else {
- int wordStartPos = styler.GetStartSegment();
- int word_style = ClassifyWordRb(wordStartPos, i - 1, keywords, styler, prevWord);
- switch (word_style) {
- case SCE_RB_WORD:
- preferRE = RE_CanFollowKeyword(prevWord);
- break;
-
- case SCE_RB_WORD_DEMOTED:
- preferRE = true;
- break;
-
- case SCE_RB_IDENTIFIER:
- if (isMatch(styler, lengthDoc, wordStartPos, "print")) {
- preferRE = true;
- } else if (isEOLChar(ch)) {
- preferRE = true;
- } else {
- preferRE = false;
- }
- break;
- default:
- preferRE = false;
- }
- if (ch == '.') {
- // We might be redefining an operator-method
- preferRE = false;
- }
- // And if it's the first
- redo_char(i, ch, chNext, chNext2, state); // pass by ref
- }
- }
- } else if (state == SCE_RB_NUMBER) {
- if (!is_real_number) {
- if (ch != '\\') {
- styler.ColourTo(i, state);
- state = SCE_RB_DEFAULT;
- preferRE = false;
- } else if (strchr("\\ntrfvaebs", chNext)) {
- // Terminal escape sequence -- handle it next time
- // Nothing more to do this time through the loop
- } else if (chNext == 'C' || chNext == 'M') {
- if (chNext2 != '-') {
- // \C or \M ends the sequence -- handle it next time
- } else {
- // Move from abc?\C-x
- // ^
- // to
- // ^
- i += 2;
- ch = chNext2;
- chNext = styler.SafeGetCharAt(i + 1);
- }
- } else if (chNext == 'c') {
- // Stay here, \c is a combining sequence
- advance_char(i, ch, chNext, chNext2); // pass by ref
- } else {
- // ?\x, including ?\\ is final.
- styler.ColourTo(i + 1, state);
- state = SCE_RB_DEFAULT;
- preferRE = false;
- advance_char(i, ch, chNext, chNext2);
- }
- } else if (isSafeAlnumOrHigh(ch) || ch == '_') {
- // Keep going
- } else if (ch == '.' && ++numDots == 1) {
- // Keep going
- } else {
- styler.ColourTo(i - 1, state);
- redo_char(i, ch, chNext, chNext2, state); // pass by ref
- preferRE = false;
- }
- } else if (state == SCE_RB_COMMENTLINE) {
- if (isEOLChar(ch)) {
- styler.ColourTo(i - 1, state);
- state = SCE_RB_DEFAULT;
- // Use whatever setting we had going into the comment
- }
- } else if (state == SCE_RB_HERE_DELIM) {
- // See the comment for SCE_RB_HERE_DELIM in LexPerl.cxx
- // Slightly different: if we find an immediate '-',
- // the target can appear indented.
-
- if (HereDoc.State == 0) { // '<<' encountered
- HereDoc.State = 1;
- HereDoc.DelimiterLength = 0;
- if (ch == '-') {
- HereDoc.CanBeIndented = true;
- advance_char(i, ch, chNext, chNext2); // pass by ref
- } else {
- HereDoc.CanBeIndented = false;
- }
- if (isEOLChar(ch)) {
- // Bail out of doing a here doc if there's no target
- state = SCE_RB_DEFAULT;
- preferRE = false;
- } else {
- HereDoc.Quote = ch;
-
- if (ch == '\'' || ch == '"' || ch == '`') {
- HereDoc.Quoted = true;
- HereDoc.Delimiter[0] = '\0';
- } else {
- HereDoc.Quoted = false;
- HereDoc.Delimiter[0] = ch;
- HereDoc.Delimiter[1] = '\0';
- HereDoc.DelimiterLength = 1;
- }
- }
- } else if (HereDoc.State == 1) { // collect the delimiter
- if (isEOLChar(ch)) {
- // End the quote now, and go back for more
- styler.ColourTo(i - 1, state);
- state = SCE_RB_DEFAULT;
- i--;
- chNext = ch;
- chNext2 = chNext;
- preferRE = false;
- } else if (HereDoc.Quoted) {
- if (ch == HereDoc.Quote) { // closing quote => end of delimiter
- styler.ColourTo(i, state);
- state = SCE_RB_DEFAULT;
- preferRE = false;
- } else {
- if (ch == '\\' && !isEOLChar(chNext)) {
- advance_char(i, ch, chNext, chNext2);
- }
- HereDoc.Delimiter[HereDoc.DelimiterLength++] = ch;
- HereDoc.Delimiter[HereDoc.DelimiterLength] = '\0';
- }
- } else { // an unquoted here-doc delimiter
- if (isSafeAlnumOrHigh(ch) || ch == '_') {
- HereDoc.Delimiter[HereDoc.DelimiterLength++] = ch;
- HereDoc.Delimiter[HereDoc.DelimiterLength] = '\0';
- } else {
- styler.ColourTo(i - 1, state);
- redo_char(i, ch, chNext, chNext2, state);
- preferRE = false;
- }
- }
- if (HereDoc.DelimiterLength >= static_cast<int>(sizeof(HereDoc.Delimiter)) - 1) {
- styler.ColourTo(i - 1, state);
- state = SCE_RB_ERROR;
- preferRE = false;
- }
- }
- } else if (state == SCE_RB_HERE_Q) {
- // Not needed: HereDoc.State == 2
- // Indentable here docs: look backwards
- // Non-indentable: look forwards, like in Perl
- //
- // Why: so we can quickly resolve things like <<-" abc"
-
- if (!HereDoc.CanBeIndented) {
- if (isEOLChar(chPrev)
- && isMatch(styler, lengthDoc, i, HereDoc.Delimiter)) {
- styler.ColourTo(i - 1, state);
- i += HereDoc.DelimiterLength - 1;
- chNext = styler.SafeGetCharAt(i + 1);
- if (isEOLChar(chNext)) {
- styler.ColourTo(i, SCE_RB_HERE_DELIM);
- state = SCE_RB_DEFAULT;
- HereDoc.State = 0;
- preferRE = false;
- }
- // Otherwise we skipped through the here doc faster.
- }
- } else if (isEOLChar(chNext)
- && lookingAtHereDocDelim(styler,
- i - HereDoc.DelimiterLength + 1,
- lengthDoc,
- HereDoc.Delimiter)) {
- styler.ColourTo(i - 1 - HereDoc.DelimiterLength, state);
- styler.ColourTo(i, SCE_RB_HERE_DELIM);
- state = SCE_RB_DEFAULT;
- preferRE = false;
- HereDoc.State = 0;
- }
- } else if (state == SCE_RB_CLASS_VAR
- || state == SCE_RB_INSTANCE_VAR
- || state == SCE_RB_SYMBOL) {
- if (!isSafeWordcharOrHigh(ch)) {
- styler.ColourTo(i - 1, state);
- redo_char(i, ch, chNext, chNext2, state); // pass by ref
- preferRE = false;
- }
- } else if (state == SCE_RB_GLOBAL) {
- if (!isSafeWordcharOrHigh(ch)) {
- // handle special globals here as well
- if (chPrev == '$') {
- if (ch == '-') {
- // Include the next char, like $-a
- advance_char(i, ch, chNext, chNext2);
- }
- styler.ColourTo(i, state);
- state = SCE_RB_DEFAULT;
- } else {
- styler.ColourTo(i - 1, state);
- redo_char(i, ch, chNext, chNext2, state); // pass by ref
- }
- preferRE = false;
- }
- } else if (state == SCE_RB_POD) {
- // PODs end with ^=end\s, -- any whitespace can follow =end
- if (strchr(" \t\n\r", ch) != NULL
- && i > 5
- && isEOLChar(styler[i - 5])
- && isMatch(styler, lengthDoc, i - 4, "=end")) {
- styler.ColourTo(i - 1, state);
- state = SCE_RB_DEFAULT;
- preferRE = false;
- }
- } else if (state == SCE_RB_REGEX || state == SCE_RB_STRING_QR) {
- if (ch == '\\' && Quote.Up != '\\') {
- // Skip one
- advance_char(i, ch, chNext, chNext2);
- } else if (ch == Quote.Down) {
- Quote.Count--;
- if (Quote.Count == 0) {
- // Include the options
- while (isSafeAlpha(chNext)) {
- i++;
- ch = chNext;
- chNext = styler.SafeGetCharAt(i + 1);
- }
- styler.ColourTo(i, state);
- state = SCE_RB_DEFAULT;
- preferRE = false;
- }
- } else if (ch == Quote.Up) {
- // Only if close quoter != open quoter
- Quote.Count++;
-
- } else if (ch == '#' ) {
- if (chNext == '{'
- && inner_string_count < INNER_STRINGS_MAX_COUNT) {
- // process #{ ... }
- styler.ColourTo(i - 1, state);
- styler.ColourTo(i + 1, SCE_RB_OPERATOR);
- enterInnerExpression(inner_string_types,
- inner_expn_brace_counts,
- inner_quotes,
- inner_string_count,
- state,
- brace_counts,
- Quote);
- preferRE = true;
- // Skip one
- advance_char(i, ch, chNext, chNext2);
- } else {
- //todo: distinguish comments from pound chars
- // for now, handle as comment
- styler.ColourTo(i - 1, state);
- bool inEscape = false;
- while (++i < lengthDoc) {
- ch = styler.SafeGetCharAt(i);
- if (ch == '\\') {
- inEscape = true;
- } else if (isEOLChar(ch)) {
- // Comment inside a regex
- styler.ColourTo(i - 1, SCE_RB_COMMENTLINE);
- break;
- } else if (inEscape) {
- inEscape = false; // don't look at char
- } else if (ch == Quote.Down) {
- // Have the regular handler deal with this
- // to get trailing modifiers.
- i--;
- ch = styler[i];
- break;
- }
- }
- chNext = styler.SafeGetCharAt(i + 1);
- chNext2 = styler.SafeGetCharAt(i + 2);
- }
- }
- // Quotes of all kinds...
- } else if (state == SCE_RB_STRING_Q || state == SCE_RB_STRING_QQ ||
- state == SCE_RB_STRING_QX || state == SCE_RB_STRING_QW ||
- state == SCE_RB_STRING || state == SCE_RB_CHARACTER ||
- state == SCE_RB_BACKTICKS) {
- if (!Quote.Down && !isspacechar(ch)) {
- Quote.Open(ch);
- } else if (ch == '\\' && Quote.Up != '\\') {
- //Riddle me this: Is it safe to skip *every* escaped char?
- advance_char(i, ch, chNext, chNext2);
- } else if (ch == Quote.Down) {
- Quote.Count--;
- if (Quote.Count == 0) {
- styler.ColourTo(i, state);
- state = SCE_RB_DEFAULT;
- preferRE = false;
- }
- } else if (ch == Quote.Up) {
- Quote.Count++;
- } else if (ch == '#' && chNext == '{'
- && inner_string_count < INNER_STRINGS_MAX_COUNT
- && state != SCE_RB_CHARACTER
- && state != SCE_RB_STRING_Q) {
- // process #{ ... }
- styler.ColourTo(i - 1, state);
- styler.ColourTo(i + 1, SCE_RB_OPERATOR);
- enterInnerExpression(inner_string_types,
- inner_expn_brace_counts,
- inner_quotes,
- inner_string_count,
- state,
- brace_counts,
- Quote);
- preferRE = true;
- // Skip one
- advance_char(i, ch, chNext, chNext2);
- }
- }
-
- if (state == SCE_RB_ERROR) {
- break;
- }
- chPrev = ch;
- }
- if (state == SCE_RB_WORD) {
- // We've ended on a word, possibly at EOF, and need to
- // classify it.
- (void) ClassifyWordRb(styler.GetStartSegment(), lengthDoc - 1, keywords, styler, prevWord);
- } else {
- styler.ColourTo(lengthDoc - 1, state);
- }
-}
-
-// Helper functions for folding, disambiguation keywords
-// Assert that there are no high-bit chars
-
-static void getPrevWord(int pos,
- char *prevWord,
- Accessor &styler,
- int word_state)
-{
- int i;
- styler.Flush();
- for (i = pos - 1; i > 0; i--) {
- if (actual_style(styler.StyleAt(i)) != word_state) {
- i++;
- break;
- }
- }
- if (i < pos - MAX_KEYWORD_LENGTH) // overflow
- i = pos - MAX_KEYWORD_LENGTH;
- char *dst = prevWord;
- for (; i <= pos; i++) {
- *dst++ = styler[i];
- }
- *dst = 0;
-}
-
-static bool keywordIsAmbiguous(const char *prevWord)
-{
- // Order from most likely used to least likely
- // Lots of ways to do a loop in Ruby besides 'while/until'
- if (!strcmp(prevWord, "if")
- || !strcmp(prevWord, "do")
- || !strcmp(prevWord, "while")
- || !strcmp(prevWord, "unless")
- || !strcmp(prevWord, "until")) {
- return true;
- } else {
- return false;
- }
-}
-
-// Demote keywords in the following conditions:
-// if, while, unless, until modify a statement
-// do after a while or until, as a noise word (like then after if)
-
-static bool keywordIsModifier(const char *word,
- int pos,
- Accessor &styler)
-{
- if (word[0] == 'd' && word[1] == 'o' && !word[2]) {
- return keywordDoStartsLoop(pos, styler);
- }
- char ch;
- int style = SCE_RB_DEFAULT;
- int lineStart = styler.GetLine(pos);
- int lineStartPosn = styler.LineStart(lineStart);
- styler.Flush();
- while (--pos >= lineStartPosn) {
- style = actual_style(styler.StyleAt(pos));
- if (style == SCE_RB_DEFAULT) {
- if (iswhitespace(ch = styler[pos])) {
- //continue
- } else if (ch == '\r' || ch == '\n') {
- // Scintilla's LineStart() and GetLine() routines aren't
- // platform-independent, so if we have text prepared with
- // a different system we can't rely on it.
- return false;
- }
- } else {
- break;
- }
- }
- if (pos < lineStartPosn) {
- return false; //XXX not quite right if the prev line is a continuation
- }
- // First things where the action is unambiguous
- switch (style) {
- case SCE_RB_DEFAULT:
- case SCE_RB_COMMENTLINE:
- case SCE_RB_POD:
- case SCE_RB_CLASSNAME:
- case SCE_RB_DEFNAME:
- case SCE_RB_MODULE_NAME:
- return false;
- case SCE_RB_OPERATOR:
- break;
- case SCE_RB_WORD:
- // Watch out for uses of 'else if'
- //XXX: Make a list of other keywords where 'if' isn't a modifier
- // and can appear legitimately
- // Formulate this to avoid warnings from most compilers
- if (strcmp(word, "if") == 0) {
- char prevWord[MAX_KEYWORD_LENGTH + 1];
- getPrevWord(pos, prevWord, styler, SCE_RB_WORD);
- return strcmp(prevWord, "else") != 0;
- }
- return true;
- default:
- return true;
- }
- // Assume that if the keyword follows an operator,
- // usually it's a block assignment, like
- // a << if x then y else z
-
- ch = styler[pos];
- switch (ch) {
- case ')':
- case ']':
- case '}':
- return true;
- default:
- return false;
- }
-}
-
-#define WHILE_BACKWARDS "elihw"
-#define UNTIL_BACKWARDS "litnu"
-
-// Nothing fancy -- look to see if we follow a while/until somewhere
-// on the current line
-
-static bool keywordDoStartsLoop(int pos,
- Accessor &styler)
-{
- char ch;
- int style;
- int lineStart = styler.GetLine(pos);
- int lineStartPosn = styler.LineStart(lineStart);
- styler.Flush();
- while (--pos >= lineStartPosn) {
- style = actual_style(styler.StyleAt(pos));
- if (style == SCE_RB_DEFAULT) {
- if ((ch = styler[pos]) == '\r' || ch == '\n') {
- // Scintilla's LineStart() and GetLine() routines aren't
- // platform-independent, so if we have text prepared with
- // a different system we can't rely on it.
- return false;
- }
- } else if (style == SCE_RB_WORD) {
- // Check for while or until, but write the word in backwards
- char prevWord[MAX_KEYWORD_LENGTH + 1]; // 1 byte for zero
- char *dst = prevWord;
- int wordLen = 0;
- int start_word;
- for (start_word = pos;
- start_word >= lineStartPosn && actual_style(styler.StyleAt(start_word)) == SCE_RB_WORD;
- start_word--) {
- if (++wordLen < MAX_KEYWORD_LENGTH) {
- *dst++ = styler[start_word];
- }
- }
- *dst = 0;
- // Did we see our keyword?
- if (!strcmp(prevWord, WHILE_BACKWARDS)
- || !strcmp(prevWord, UNTIL_BACKWARDS)) {
- return true;
- }
- // We can move pos to the beginning of the keyword, and then
- // accept another decrement, as we can never have two contiguous
- // keywords:
- // word1 word2
- // ^
- // <- move to start_word
- // ^
- // <- loop decrement
- // ^ # pointing to end of word1 is fine
- pos = start_word;
- }
- }
- return false;
-}
-
-/*
- * Folding Ruby
- *
- * The language is quite complex to analyze without a full parse.
- * For example, this line shouldn't affect fold level:
- *
- * print "hello" if feeling_friendly?
- *
- * Neither should this:
- *
- * print "hello" \
- * if feeling_friendly?
- *
- *
- * But this should:
- *
- * if feeling_friendly? #++
- * print "hello" \
- * print "goodbye"
- * end #--
- *
- * So we cheat, by actually looking at the existing indentation
- * levels for each line, and just echoing it back. Like Python.
- * Then if we get better at it, we'll take braces into consideration,
- * which always affect folding levels.
-
- * How the keywords should work:
- * No effect:
- * __FILE__ __LINE__ BEGIN END alias and
- * defined? false in nil not or self super then
- * true undef
-
- * Always increment:
- * begin class def do for module when {
- *
- * Always decrement:
- * end }
- *
- * Increment if these start a statement
- * if unless until while -- do nothing if they're modifiers
-
- * These end a block if there's no modifier, but don't bother
- * break next redo retry return yield
- *
- * These temporarily de-indent, but re-indent
- * case else elsif ensure rescue
- *
- * This means that the folder reflects indentation rather
- * than setting it. The language-service updates indentation
- * when users type return and finishes entering de-denters.
- *
- * Later offer to fold POD, here-docs, strings, and blocks of comments
- */
-
-static void FoldRbDoc(unsigned int startPos, int length, int initStyle,
- WordList *[], Accessor &styler) {
- const bool foldCompact = styler.GetPropertyInt("fold.compact", 1) != 0;
- bool foldComment = styler.GetPropertyInt("fold.comment") != 0;
-
- synchronizeDocStart(startPos, length, initStyle, styler, // ref args
- false);
- unsigned int endPos = startPos + length;
- int visibleChars = 0;
- int lineCurrent = styler.GetLine(startPos);
- int levelPrev = startPos == 0 ? 0 : (styler.LevelAt(lineCurrent)
- & SC_FOLDLEVELNUMBERMASK
- & ~SC_FOLDLEVELBASE);
- int levelCurrent = levelPrev;
- char chNext = styler[startPos];
- int styleNext = styler.StyleAt(startPos);
- int stylePrev = startPos <= 1 ? SCE_RB_DEFAULT : styler.StyleAt(startPos - 1);
- bool buffer_ends_with_eol = false;
- for (unsigned int i = startPos; i < endPos; i++) {
- char ch = chNext;
- chNext = styler.SafeGetCharAt(i + 1);
- int style = styleNext;
- styleNext = styler.StyleAt(i + 1);
- bool atEOL = (ch == '\r' && chNext != '\n') || (ch == '\n');
- if (style == SCE_RB_COMMENTLINE) {
- if (foldComment && stylePrev != SCE_RB_COMMENTLINE) {
- if (chNext == '{') {
- levelCurrent++;
- } else if (chNext == '}' && levelCurrent > 0) {
- levelCurrent--;
- }
- }
- } else if (style == SCE_RB_OPERATOR) {
- if (strchr("[{(", ch)) {
- levelCurrent++;
- } else if (strchr(")}]", ch)) {
- // Don't decrement below 0
- if (levelCurrent > 0)
- levelCurrent--;
- }
- } else if (style == SCE_RB_WORD && styleNext != SCE_RB_WORD) {
- // Look at the keyword on the left and decide what to do
- char prevWord[MAX_KEYWORD_LENGTH + 1]; // 1 byte for zero
- prevWord[0] = 0;
- getPrevWord(i, prevWord, styler, SCE_RB_WORD);
- if (!strcmp(prevWord, "end")) {
- // Don't decrement below 0
- if (levelCurrent > 0)
- levelCurrent--;
- } else if ( !strcmp(prevWord, "if")
- || !strcmp(prevWord, "def")
- || !strcmp(prevWord, "class")
- || !strcmp(prevWord, "module")
- || !strcmp(prevWord, "begin")
- || !strcmp(prevWord, "case")
- || !strcmp(prevWord, "do")
- || !strcmp(prevWord, "while")
- || !strcmp(prevWord, "unless")
- || !strcmp(prevWord, "until")
- || !strcmp(prevWord, "for")
- ) {
- levelCurrent++;
- }
- }
- if (atEOL) {
- int lev = levelPrev;
- if (visibleChars == 0 && foldCompact)
- lev |= SC_FOLDLEVELWHITEFLAG;
- if ((levelCurrent > levelPrev) && (visibleChars > 0))
- lev |= SC_FOLDLEVELHEADERFLAG;
- styler.SetLevel(lineCurrent, lev|SC_FOLDLEVELBASE);
- lineCurrent++;
- levelPrev = levelCurrent;
- visibleChars = 0;
- buffer_ends_with_eol = true;
- } else if (!isspacechar(ch)) {
- visibleChars++;
- buffer_ends_with_eol = false;
- }
- stylePrev = style;
- }
- // Fill in the real level of the next line, keeping the current flags as they will be filled in later
- if (!buffer_ends_with_eol) {
- lineCurrent++;
- int new_lev = levelCurrent;
- if (visibleChars == 0 && foldCompact)
- new_lev |= SC_FOLDLEVELWHITEFLAG;
- if ((levelCurrent > levelPrev) && (visibleChars > 0))
- new_lev |= SC_FOLDLEVELHEADERFLAG;
- levelCurrent = new_lev;
- }
- styler.SetLevel(lineCurrent, levelCurrent|SC_FOLDLEVELBASE);
-}
-
-static const char * const rubyWordListDesc[] = {
- "Keywords",
- 0
-};
-
-LexerModule lmRuby(SCLEX_RUBY, ColouriseRbDoc, "ruby", FoldRbDoc, rubyWordListDesc);
generated by cgit v1.2.3 (git 2.25.1) at 2025-10-31 02:43:58 +0000