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564 lines
18 KiB
564 lines
18 KiB
// Scintilla source code edit control
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/** @file LexCoffeeScript.cxx
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** Lexer for CoffeeScript.
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**/
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// Copyright 1998-2011 by Neil Hodgson <neilh@scintilla.org>
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// Based on the Scintilla C++ Lexer
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// Written by Eric Promislow <ericp@activestate.com> in 2011 for the Komodo IDE
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// The License.txt file describes the conditions under which this software may be distributed.
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#include <stdlib.h>
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#include <string.h>
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#include <stdio.h>
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#include <stdarg.h>
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#include <assert.h>
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#include <ctype.h>
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#include "Platform.h"
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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 "Accessor.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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#ifdef SCI_NAMESPACE
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using namespace Scintilla;
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#endif
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static bool IsSpaceEquiv(int state) {
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return (state <= SCE_C_COMMENTDOC
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// including SCE_C_DEFAULT, SCE_C_COMMENT, SCE_C_COMMENTLINE
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|| state == SCE_C_COMMENTLINEDOC
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|| state == SCE_C_COMMENTDOCKEYWORD
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|| state == SCE_C_COMMENTDOCKEYWORDERROR
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|| state == SCE_COFFEESCRIPT_COMMENTBLOCK
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|| state == SCE_COFFEESCRIPT_VERBOSE_REGEX
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|| state == SCE_COFFEESCRIPT_VERBOSE_REGEX_COMMENT
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|| state == SCE_C_WORD
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|| state == SCE_C_REGEX);
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}
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// Preconditions: sc.currentPos points to a character after '+' or '-'.
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// The test for pos reaching 0 should be redundant,
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// and is in only for safety measures.
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// Limitation: this code will give the incorrect answer for code like
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// a = b+++/ptn/...
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// Putting a space between the '++' post-inc operator and the '+' binary op
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// fixes this, and is highly recommended for readability anyway.
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static bool FollowsPostfixOperator(StyleContext &sc, Accessor &styler) {
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int pos = (int) sc.currentPos;
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while (--pos > 0) {
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char ch = styler[pos];
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if (ch == '+' || ch == '-') {
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return styler[pos - 1] == ch;
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}
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}
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return false;
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}
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static bool followsReturnKeyword(StyleContext &sc, Accessor &styler) {
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// Don't look at styles, so no need to flush.
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int pos = (int) sc.currentPos;
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int currentLine = styler.GetLine(pos);
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int lineStartPos = styler.LineStart(currentLine);
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char ch;
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while (--pos > lineStartPos) {
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ch = styler.SafeGetCharAt(pos);
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if (ch != ' ' && ch != '\t') {
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break;
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}
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}
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const char *retBack = "nruter";
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const char *s = retBack;
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while (*s
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&& pos >= lineStartPos
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&& styler.SafeGetCharAt(pos) == *s) {
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s++;
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pos--;
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}
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return !*s;
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}
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static void ColouriseCoffeeScriptDoc(unsigned int startPos, int length, int initStyle, WordList *keywordlists[],
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Accessor &styler) {
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WordList &keywords = *keywordlists[0];
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WordList &keywords2 = *keywordlists[1];
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WordList &keywords3 = *keywordlists[2];
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WordList &keywords4 = *keywordlists[3];
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// property styling.within.preprocessor
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// For C++ code, determines whether all preprocessor code is styled in the preprocessor style (0, the default)
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// or only from the initial # to the end of the command word(1).
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bool stylingWithinPreprocessor = styler.GetPropertyInt("styling.within.preprocessor") != 0;
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CharacterSet setOKBeforeRE(CharacterSet::setNone, "([{=,:;!%^&*|?~+-");
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CharacterSet setCouldBePostOp(CharacterSet::setNone, "+-");
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CharacterSet setDoxygen(CharacterSet::setAlpha, "$@\\&<>#{}[]");
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CharacterSet setWordStart(CharacterSet::setAlpha, "_", 0x80, true);
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CharacterSet setWord(CharacterSet::setAlphaNum, "._", 0x80, true);
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// property lexer.cpp.allow.dollars
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// Set to 0 to disallow the '$' character in identifiers with the cpp lexer.
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if (styler.GetPropertyInt("lexer.cpp.allow.dollars", 1) != 0) {
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setWordStart.Add('$');
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setWord.Add('$');
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}
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int chPrevNonWhite = ' ';
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int visibleChars = 0;
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bool lastWordWasUUID = false;
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int styleBeforeDCKeyword = SCE_C_DEFAULT;
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bool continuationLine = false;
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bool isIncludePreprocessor = false;
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if (initStyle == SCE_C_PREPROCESSOR) {
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// Set continuationLine if last character of previous line is '\'
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int lineCurrent = styler.GetLine(startPos);
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if (lineCurrent > 0) {
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int chBack = styler.SafeGetCharAt(startPos-1, 0);
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int chBack2 = styler.SafeGetCharAt(startPos-2, 0);
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int lineEndChar = '!';
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if (chBack2 == '\r' && chBack == '\n') {
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lineEndChar = styler.SafeGetCharAt(startPos-3, 0);
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} else if (chBack == '\n' || chBack == '\r') {
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lineEndChar = chBack2;
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}
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continuationLine = lineEndChar == '\\';
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}
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}
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// look back to set chPrevNonWhite properly for better regex colouring
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int endPos = startPos + length;
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if (startPos > 0 && IsSpaceEquiv(initStyle)) {
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unsigned int back = startPos;
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styler.Flush();
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while (back > 0 && IsSpaceEquiv(styler.StyleAt(--back)))
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;
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if (styler.StyleAt(back) == SCE_C_OPERATOR) {
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chPrevNonWhite = styler.SafeGetCharAt(back);
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}
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if (startPos != back) {
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initStyle = styler.StyleAt(back);
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if (IsSpaceEquiv(initStyle)) {
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initStyle = SCE_C_DEFAULT;
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}
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}
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startPos = back;
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}
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StyleContext sc(startPos, endPos - startPos, initStyle, styler);
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for (; sc.More(); sc.Forward()) {
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if (sc.atLineStart) {
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// Reset states to begining of colourise so no surprises
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// if different sets of lines lexed.
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visibleChars = 0;
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lastWordWasUUID = false;
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isIncludePreprocessor = false;
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}
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// Handle line continuation generically.
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if (sc.ch == '\\') {
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if (sc.chNext == '\n' || sc.chNext == '\r') {
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sc.Forward();
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if (sc.ch == '\r' && sc.chNext == '\n') {
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sc.Forward();
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}
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continuationLine = true;
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continue;
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}
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}
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// Determine if the current state should terminate.
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switch (sc.state) {
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case SCE_C_OPERATOR:
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sc.SetState(SCE_C_DEFAULT);
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break;
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case SCE_C_NUMBER:
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// We accept almost anything because of hex. and number suffixes
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if (!setWord.Contains(sc.ch)) {
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sc.SetState(SCE_C_DEFAULT);
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}
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break;
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case SCE_C_IDENTIFIER:
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if (!setWord.Contains(sc.ch) || (sc.ch == '.') || (sc.ch == '$')) {
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char s[1000];
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sc.GetCurrent(s, sizeof(s));
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if (keywords.InList(s)) {
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lastWordWasUUID = strcmp(s, "uuid") == 0;
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sc.ChangeState(SCE_C_WORD);
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} else if (keywords2.InList(s)) {
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sc.ChangeState(SCE_C_WORD2);
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} else if (keywords4.InList(s)) {
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sc.ChangeState(SCE_C_GLOBALCLASS);
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}
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sc.SetState(SCE_C_DEFAULT);
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}
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break;
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case SCE_C_PREPROCESSOR:
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if (sc.atLineStart && !continuationLine) {
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sc.SetState(SCE_C_DEFAULT);
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} else if (stylingWithinPreprocessor) {
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if (IsASpace(sc.ch)) {
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sc.SetState(SCE_C_DEFAULT);
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}
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} else {
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if (sc.Match('/', '*') || sc.Match('/', '/')) {
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sc.SetState(SCE_C_DEFAULT);
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}
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}
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break;
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case SCE_C_COMMENT:
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if (sc.Match('*', '/')) {
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sc.Forward();
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sc.ForwardSetState(SCE_C_DEFAULT);
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}
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break;
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case SCE_C_COMMENTDOC:
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if (sc.Match('*', '/')) {
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sc.Forward();
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sc.ForwardSetState(SCE_C_DEFAULT);
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} else if (sc.ch == '@' || sc.ch == '\\') { // JavaDoc and Doxygen support
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// Verify that we have the conditions to mark a comment-doc-keyword
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if ((IsASpace(sc.chPrev) || sc.chPrev == '*') && (!IsASpace(sc.chNext))) {
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styleBeforeDCKeyword = SCE_C_COMMENTDOC;
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sc.SetState(SCE_C_COMMENTDOCKEYWORD);
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}
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}
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break;
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case SCE_C_COMMENTLINE:
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if (sc.atLineStart) {
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sc.SetState(SCE_C_DEFAULT);
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}
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break;
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case SCE_C_COMMENTLINEDOC:
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if (sc.atLineStart) {
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sc.SetState(SCE_C_DEFAULT);
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} else if (sc.ch == '@' || sc.ch == '\\') { // JavaDoc and Doxygen support
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// Verify that we have the conditions to mark a comment-doc-keyword
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if ((IsASpace(sc.chPrev) || sc.chPrev == '/' || sc.chPrev == '!') && (!IsASpace(sc.chNext))) {
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styleBeforeDCKeyword = SCE_C_COMMENTLINEDOC;
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sc.SetState(SCE_C_COMMENTDOCKEYWORD);
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}
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}
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break;
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case SCE_C_COMMENTDOCKEYWORD:
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if ((styleBeforeDCKeyword == SCE_C_COMMENTDOC) && sc.Match('*', '/')) {
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sc.ChangeState(SCE_C_COMMENTDOCKEYWORDERROR);
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sc.Forward();
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sc.ForwardSetState(SCE_C_DEFAULT);
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} else if (!setDoxygen.Contains(sc.ch)) {
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char s[100];
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sc.GetCurrent(s, sizeof(s));
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if (!IsASpace(sc.ch) || !keywords3.InList(s + 1)) {
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sc.ChangeState(SCE_C_COMMENTDOCKEYWORDERROR);
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}
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sc.SetState(styleBeforeDCKeyword);
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}
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break;
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case SCE_C_STRING:
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if (isIncludePreprocessor) {
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if (sc.ch == '>') {
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sc.ForwardSetState(SCE_C_DEFAULT);
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isIncludePreprocessor = false;
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}
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} else if (sc.ch == '\\') {
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if (sc.chNext == '\"' || sc.chNext == '\'' || sc.chNext == '\\') {
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sc.Forward();
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}
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} else if (sc.ch == '\"') {
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sc.ForwardSetState(SCE_C_DEFAULT);
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}
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break;
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case SCE_C_CHARACTER:
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if (sc.ch == '\\') {
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if (sc.chNext == '\"' || sc.chNext == '\'' || sc.chNext == '\\') {
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sc.Forward();
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}
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} else if (sc.ch == '\'') {
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sc.ForwardSetState(SCE_C_DEFAULT);
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}
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break;
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case SCE_C_REGEX:
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if (sc.atLineStart) {
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sc.SetState(SCE_C_DEFAULT);
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} else if (sc.ch == '/') {
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sc.Forward();
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while ((sc.ch < 0x80) && islower(sc.ch))
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sc.Forward(); // gobble regex flags
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sc.SetState(SCE_C_DEFAULT);
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} else if (sc.ch == '\\') {
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// Gobble up the quoted character
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if (sc.chNext == '\\' || sc.chNext == '/') {
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sc.Forward();
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}
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}
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break;
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case SCE_C_STRINGEOL:
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if (sc.atLineStart) {
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sc.SetState(SCE_C_DEFAULT);
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}
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break;
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case SCE_C_VERBATIM:
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if (sc.ch == '\"') {
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if (sc.chNext == '\"') {
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sc.Forward();
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} else {
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sc.ForwardSetState(SCE_C_DEFAULT);
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}
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}
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break;
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case SCE_C_UUID:
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if (sc.ch == '\r' || sc.ch == '\n' || sc.ch == ')') {
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sc.SetState(SCE_C_DEFAULT);
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}
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break;
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case SCE_COFFEESCRIPT_COMMENTBLOCK:
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if (sc.Match("###")) {
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sc.Forward();
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sc.Forward();
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sc.ForwardSetState(SCE_C_DEFAULT);
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} else if (sc.ch == '\\') {
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sc.Forward();
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}
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break;
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case SCE_COFFEESCRIPT_VERBOSE_REGEX:
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if (sc.Match("///")) {
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sc.Forward();
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sc.Forward();
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sc.ForwardSetState(SCE_C_DEFAULT);
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} else if (sc.Match('#')) {
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sc.SetState(SCE_COFFEESCRIPT_VERBOSE_REGEX_COMMENT);
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} else if (sc.ch == '\\') {
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sc.Forward();
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}
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break;
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case SCE_COFFEESCRIPT_VERBOSE_REGEX_COMMENT:
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if (sc.atLineStart) {
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sc.SetState(SCE_COFFEESCRIPT_VERBOSE_REGEX);
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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 (sc.state == SCE_C_DEFAULT) {
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if (sc.Match('@', '\"')) {
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sc.SetState(SCE_C_VERBATIM);
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sc.Forward();
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} else if (IsADigit(sc.ch) || (sc.ch == '.' && IsADigit(sc.chNext))) {
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if (lastWordWasUUID) {
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sc.SetState(SCE_C_UUID);
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lastWordWasUUID = false;
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} else {
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sc.SetState(SCE_C_NUMBER);
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}
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} else if (setWordStart.Contains(sc.ch) || (sc.ch == '@') || (sc.ch == '$')) {
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if (lastWordWasUUID) {
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sc.SetState(SCE_C_UUID);
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lastWordWasUUID = false;
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} else {
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sc.SetState(SCE_C_IDENTIFIER);
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}
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} else if (sc.Match('/', '*')) {
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if (sc.Match("/**") || sc.Match("/*!")) { // Support of Qt/Doxygen doc. style
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sc.SetState(SCE_C_COMMENTDOC);
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} else {
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sc.SetState(SCE_C_COMMENT);
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}
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sc.Forward(); // Eat the * so it isn't used for the end of the comment
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} else if (sc.Match("///")) {
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sc.SetState(SCE_COFFEESCRIPT_VERBOSE_REGEX);
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sc.Forward();
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sc.Forward();
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} else if (sc.ch == '/'
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&& (setOKBeforeRE.Contains(chPrevNonWhite)
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|| followsReturnKeyword(sc, styler))
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&& (!setCouldBePostOp.Contains(chPrevNonWhite)
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|| !FollowsPostfixOperator(sc, styler))) {
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sc.SetState(SCE_C_REGEX); // JavaScript's RegEx
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} else if (sc.ch == '\"') {
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sc.SetState(SCE_C_STRING);
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isIncludePreprocessor = false; // ensure that '>' won't end the string
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} else if (isIncludePreprocessor && sc.ch == '<') {
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sc.SetState(SCE_C_STRING);
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} else if (sc.ch == '\'') {
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sc.SetState(SCE_C_CHARACTER);
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} else if (sc.ch == '#') {
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if (sc.Match("###")) {
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sc.SetState(SCE_COFFEESCRIPT_COMMENTBLOCK);
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sc.Forward();
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sc.Forward();
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} else {
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sc.SetState(SCE_C_COMMENTLINE);
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}
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} else if (isoperator(static_cast<char>(sc.ch))) {
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sc.SetState(SCE_C_OPERATOR);
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}
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}
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if (!IsASpace(sc.ch) && !IsSpaceEquiv(sc.state)) {
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chPrevNonWhite = sc.ch;
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visibleChars++;
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}
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continuationLine = false;
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}
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sc.Complete();
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}
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static bool IsCommentLine(int line, Accessor &styler) {
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int pos = styler.LineStart(line);
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int eol_pos = styler.LineStart(line + 1) - 1;
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for (int i = pos; i < eol_pos; i++) {
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char ch = styler[i];
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if (ch == '#')
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return true;
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else if (ch == '/'
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&& i < eol_pos - 1
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&& styler[i + 1] == '*')
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return true;
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else if (ch != ' ' && ch != '\t')
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return false;
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}
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return false;
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}
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static void FoldCoffeeScriptDoc(unsigned int startPos, int length, int,
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WordList *[], Accessor &styler) {
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// A simplified version of FoldPyDoc
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const int maxPos = startPos + length;
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const int maxLines = styler.GetLine(maxPos - 1); // Requested last line
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const int docLines = styler.GetLine(styler.Length() - 1); // Available last line
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// property fold.coffeescript.comment
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const bool foldComment = styler.GetPropertyInt("fold.coffeescript.comment") != 0;
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const bool foldCompact = styler.GetPropertyInt("fold.compact") != 0;
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// Backtrack to previous non-blank line so we can determine indent level
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// for any white space lines
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// and so we can fix any preceding fold level (which is why we go back
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// at least one line in all cases)
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int spaceFlags = 0;
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int lineCurrent = styler.GetLine(startPos);
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int indentCurrent = styler.IndentAmount(lineCurrent, &spaceFlags, NULL);
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while (lineCurrent > 0) {
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lineCurrent--;
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indentCurrent = styler.IndentAmount(lineCurrent, &spaceFlags, NULL);
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if (!(indentCurrent & SC_FOLDLEVELWHITEFLAG)
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&& !IsCommentLine(lineCurrent, styler))
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break;
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}
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int indentCurrentLevel = indentCurrent & SC_FOLDLEVELNUMBERMASK;
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// Set up initial loop state
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int prevComment = 0;
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if (lineCurrent >= 1)
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prevComment = foldComment && IsCommentLine(lineCurrent - 1, styler);
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// Process all characters to end of requested range
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// or comment that hangs over the end of the range. Cap processing in all cases
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// to end of document (in case of comment at end).
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while ((lineCurrent <= docLines) && ((lineCurrent <= maxLines) || prevComment)) {
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// Gather info
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int lev = indentCurrent;
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int lineNext = lineCurrent + 1;
|
|
int indentNext = indentCurrent;
|
|
if (lineNext <= docLines) {
|
|
// Information about next line is only available if not at end of document
|
|
indentNext = styler.IndentAmount(lineNext, &spaceFlags, NULL);
|
|
}
|
|
const int comment = foldComment && IsCommentLine(lineCurrent, styler);
|
|
const int comment_start = (comment && !prevComment && (lineNext <= docLines) &&
|
|
IsCommentLine(lineNext, styler) && (lev > SC_FOLDLEVELBASE));
|
|
const int comment_continue = (comment && prevComment);
|
|
if (!comment)
|
|
indentCurrentLevel = indentCurrent & SC_FOLDLEVELNUMBERMASK;
|
|
if (indentNext & SC_FOLDLEVELWHITEFLAG)
|
|
indentNext = SC_FOLDLEVELWHITEFLAG | indentCurrentLevel;
|
|
|
|
if (comment_start) {
|
|
// Place fold point at start of a block of comments
|
|
lev |= SC_FOLDLEVELHEADERFLAG;
|
|
} else if (comment_continue) {
|
|
// Add level to rest of lines in the block
|
|
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.
|
|
|
|
while ((lineNext < docLines) &&
|
|
((indentNext & SC_FOLDLEVELWHITEFLAG) ||
|
|
(lineNext <= docLines && IsCommentLine(lineNext, styler)))) {
|
|
|
|
lineNext++;
|
|
indentNext = styler.IndentAmount(lineNext, &spaceFlags, NULL);
|
|
}
|
|
|
|
const int levelAfterComments = indentNext & SC_FOLDLEVELNUMBERMASK;
|
|
const int levelBeforeComments = Platform::Maximum(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
|
|
|
|
int skipLine = lineNext;
|
|
int skipLevel = levelAfterComments;
|
|
|
|
while (--skipLine > lineCurrent) {
|
|
int skipLineIndent = styler.IndentAmount(skipLine, &spaceFlags, NULL);
|
|
|
|
if (foldCompact) {
|
|
if ((skipLineIndent & SC_FOLDLEVELNUMBERMASK) > levelAfterComments)
|
|
skipLevel = levelBeforeComments;
|
|
|
|
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-comment line
|
|
if (!comment && !(indentCurrent & SC_FOLDLEVELWHITEFLAG)) {
|
|
if ((indentCurrent & SC_FOLDLEVELNUMBERMASK) < (indentNext & SC_FOLDLEVELNUMBERMASK))
|
|
lev |= SC_FOLDLEVELHEADERFLAG;
|
|
}
|
|
|
|
// Keep track of block comment state of previous line
|
|
prevComment = comment_start || comment_continue;
|
|
|
|
// Set fold level for this line and move to next line
|
|
styler.SetLevel(lineCurrent, lev);
|
|
indentCurrent = indentNext;
|
|
lineCurrent = lineNext;
|
|
}
|
|
}
|
|
|
|
static const char *const csWordLists[] = {
|
|
"Keywords",
|
|
0,
|
|
};
|
|
|
|
LexerModule lmCoffeeScript(SCLEX_COFFEESCRIPT, ColouriseCoffeeScriptDoc, "coffeescript", FoldCoffeeScriptDoc, csWordLists);
|