317 lines
10 KiB
C++
Executable File
317 lines
10 KiB
C++
Executable File
// Scintilla source code edit control
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/** @file LexProgress.cxx
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** Lexer for Progress 4GL.
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** Based on LexCPP.cxx of Neil Hodgson <neilh@scintilla.org>
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**/
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// Copyright 2006-2007 by Yuval Papish <Yuval@YuvCom.com>
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// The License.txt file describes the conditions under which this software may be distributed.
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/** TODO:
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WebSpeed support in html lexer
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Support "end triggers" expression of the triggers phrase
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**/
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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 "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 inline bool IsAWordChar(int ch) {
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return (ch < 0x80) && (isalnum(ch) || ch == '_');
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}
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static inline bool IsAWordStart(int ch) {
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return (ch < 0x80) && (isalpha(ch) || ch == '_');
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}
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enum SentenceStart { SetSentenceStart = 0xf, ResetSentenceStart = 0x10}; // true -> bit = 0
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static void Colourise4glDoc(Sci_PositionU startPos, Sci_Position length, int initStyle, WordList *keywordlists[],
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Accessor &styler) {
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WordList &keywords1 = *keywordlists[0]; // regular keywords
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WordList &keywords2 = *keywordlists[1]; // block opening keywords, only when SentenceStart
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WordList &keywords3 = *keywordlists[2]; // block opening keywords
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//WordList &keywords4 = *keywordlists[3]; // preprocessor keywords. Not implemented
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Sci_Position currentLine = styler.GetLine(startPos);
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// Initialize the block comment /* */ nesting level, if we are inside such a comment.
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int blockCommentLevel = 0;
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if (initStyle == SCE_4GL_COMMENT1 ||
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initStyle == SCE_4GL_COMMENT1_) {
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blockCommentLevel = styler.GetLineState(currentLine - 1);
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}
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// Do not leak single-line comments onto next line
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if (initStyle == SCE_4GL_COMMENT2 ||
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initStyle == SCE_4GL_COMMENT2_) {
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initStyle = SCE_4GL_DEFAULT;
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}
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int visibleChars = 0;
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int mask;
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StyleContext sc(startPos, length, 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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}
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if (sc.atLineEnd) {
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// Update the line state, so it can be seen by next line
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currentLine = styler.GetLine(sc.currentPos);
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if (sc.state == SCE_4GL_COMMENT1 ||
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sc.state == SCE_4GL_COMMENT1_) {
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// Inside a block comment, we set the line state
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styler.SetLineState(currentLine, blockCommentLevel);
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} else {
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// Reset the line state
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styler.SetLineState(currentLine, 0);
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}
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}
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// Handle line continuation generically.
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if ((sc.state & 0xf) < SCE_4GL_COMMENT1) {
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if (sc.ch == '~') {
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if (sc.chNext > ' ') {
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// skip special char after ~
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sc.Forward();
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continue;
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}
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else {
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// Skip whitespace between ~ and EOL
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while (sc.More() && (sc.chNext == ' ' || sc.chNext == '\t') ) {
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sc.Forward();
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}
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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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sc.Forward();
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continue;
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}
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}
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}
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}
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// Determine if a new state should be terminated.
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mask = sc.state & 0x10;
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switch (sc.state & 0xf) {
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case SCE_4GL_OPERATOR:
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sc.SetState(SCE_4GL_DEFAULT | mask);
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break;
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case SCE_4GL_NUMBER:
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// Hex numbers (0xnnnn) are supported so accept any
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// alphanumeric character if it follows a leading digit.
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if (!(IsAlphaNumeric(sc.ch))) {
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sc.SetState(SCE_4GL_DEFAULT | mask);
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}
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break;
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case SCE_4GL_IDENTIFIER:
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if (!IsAWordChar(sc.ch) && sc.ch != '-') {
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char s[1000];
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sc.GetCurrentLowered(s, sizeof(s));
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if ((((sc.state & 0x10) == 0) && keywords2.InListAbbreviated(s, '(')) || keywords3.InListAbbreviated(s, '(')) {
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sc.ChangeState(SCE_4GL_BLOCK | ResetSentenceStart);
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}
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else if (keywords1.InListAbbreviated(s, '(')) {
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if ((s[0] == 'e' && s[1] =='n' && s[2] == 'd' && !isalnum(s[3]) && s[3] != '-') ||
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(s[0] == 'f' && s[1] =='o' && s[2] == 'r' && s[3] == 'w' && s[4] =='a' && s[5] == 'r' && s[6] == 'd'&& !isalnum(s[7]))) {
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sc.ChangeState(SCE_4GL_END | ResetSentenceStart);
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}
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else if ((s[0] == 'e' && s[1] =='l' && s[2] == 's' && s[3] == 'e') ||
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(s[0] == 't' && s[1] =='h' && s[2] == 'e' && s[3] == 'n')) {
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sc.ChangeState(SCE_4GL_WORD & SetSentenceStart);
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}
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else {
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sc.ChangeState(SCE_4GL_WORD | ResetSentenceStart);
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}
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}
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sc.SetState(SCE_4GL_DEFAULT | (sc.state & 0x10));
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}
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break;
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case SCE_4GL_PREPROCESSOR:
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if (sc.atLineStart) {
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sc.SetState(SCE_4GL_DEFAULT & SetSentenceStart);
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}
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/* code removed to allow comments inside preprocessor
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else if (sc.ch == '*' && sc.chNext == '/') {
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sc.ForwardSetState(SCE_4GL_DEFAULT | sentenceStartState); } */
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break;
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case SCE_4GL_STRING:
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if (sc.ch == '\"') {
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sc.ForwardSetState(SCE_4GL_DEFAULT | mask);
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}
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break;
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case SCE_4GL_CHARACTER:
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if (sc.ch == '\'') {
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sc.ForwardSetState(SCE_4GL_DEFAULT | mask);
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}
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break;
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case SCE_4GL_COMMENT1:
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if (sc.Match('/', '*')) {
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blockCommentLevel++;
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sc.Forward();
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} else if (sc.Match('*', '/') && blockCommentLevel > 0) {
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blockCommentLevel--;
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sc.Forward();
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if (blockCommentLevel == 0) {
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sc.ForwardSetState(SCE_4GL_DEFAULT | mask);
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}
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}
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break;
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case SCE_4GL_COMMENT2:
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if (sc.atLineEnd) {
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sc.ForwardSetState(SCE_4GL_DEFAULT | mask);
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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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mask = sc.state & 0x10;
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if ((sc.state & 0xf) == SCE_4GL_DEFAULT) {
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if (IsADigit(sc.ch) || (sc.ch == '.' && IsADigit(sc.chNext))) {
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sc.SetState(SCE_4GL_NUMBER | ResetSentenceStart);
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} else if (IsAWordStart(sc.ch) || (sc.ch == '@')) {
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sc.SetState(SCE_4GL_IDENTIFIER | mask);
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} else if (sc.Match('/', '*')) {
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blockCommentLevel = 1;
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sc.SetState(SCE_4GL_COMMENT1 | mask);
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sc.Forward();
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} else if (sc.Match('/', '/') &&
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(sc.atLineStart || sc.chPrev == ' ' || sc.chPrev == '\t')) {
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sc.SetState(SCE_4GL_COMMENT2 | mask);
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} else if (sc.ch == '\"') {
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sc.SetState(SCE_4GL_STRING | ResetSentenceStart);
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} else if (sc.ch == '\'') {
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sc.SetState(SCE_4GL_CHARACTER | ResetSentenceStart);
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} else if (sc.ch == '&' && visibleChars == 0 && ((sc.state & 0x10) == 0)) {
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sc.SetState(SCE_4GL_PREPROCESSOR | ResetSentenceStart);
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// Skip whitespace between & and preprocessor word
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do {
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sc.Forward();
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} while ((sc.ch == ' ' || sc.ch == '\t') && sc.More());
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// Handle syntactical line termination
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} else if ((sc.ch == '.' || sc.ch == ':' || sc.ch == '}') && (sc.chNext == ' ' || sc.chNext == '\t' || sc.chNext == '\n' || sc.chNext == '\r')) {
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sc.SetState(sc.state & SetSentenceStart);
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} else if (isoperator(static_cast<char>(sc.ch))) {
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/* This code allows highlight of handles. Alas, it would cause the phrase "last-event:function"
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to be recognized as a BlockBegin */
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if (sc.ch == ':')
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sc.SetState(SCE_4GL_OPERATOR & SetSentenceStart);
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/* else */
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sc.SetState(SCE_4GL_OPERATOR | ResetSentenceStart);
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}
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}
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if (!IsASpace(sc.ch)) {
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visibleChars++;
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}
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}
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sc.Complete();
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}
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static bool IsStreamCommentStyle(int style) {
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return (style & 0xf) == SCE_4GL_COMMENT1 ;
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}
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// Store both the current line's fold level and the next lines in the
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// level store to make it easy to pick up with each increment
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// and to make it possible to fiddle the current level for "} else {".
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static void FoldNoBox4glDoc(Sci_PositionU startPos, Sci_Position length, int initStyle,
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Accessor &styler) {
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bool foldComment = styler.GetPropertyInt("fold.comment") != 0;
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bool foldCompact = styler.GetPropertyInt("fold.compact", 1) != 0;
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bool foldAtElse = styler.GetPropertyInt("fold.at.else", 0) != 0;
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Sci_PositionU endPos = startPos + length;
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int visibleChars = 0;
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Sci_Position lineCurrent = styler.GetLine(startPos);
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int levelCurrent = SC_FOLDLEVELBASE;
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if (lineCurrent > 0)
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levelCurrent = styler.LevelAt(lineCurrent-1) >> 16;
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int levelMinCurrent = levelCurrent;
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int levelNext = levelCurrent;
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char chNext = static_cast<char>(tolower(styler[startPos]));
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int styleNext = styler.StyleAt(startPos);
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int style = initStyle;
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for (Sci_PositionU i = startPos; i < endPos; i++) {
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char ch = chNext;
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chNext = static_cast<char>(tolower(styler.SafeGetCharAt(i + 1)));
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int stylePrev = style;
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style = styleNext;
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styleNext = styler.StyleAt(i + 1);
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bool atEOL = (ch == '\r' && chNext != '\n') || (ch == '\n');
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if (foldComment && IsStreamCommentStyle(style)) {
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if (!IsStreamCommentStyle(stylePrev)) {
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levelNext++;
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} else if (!IsStreamCommentStyle(styleNext)) { // && !atEOL) {
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// Comments don't end at end of line and the next character may be unstyled.
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levelNext--;
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}
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}
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else if ((style & 0xf) == SCE_4GL_BLOCK && !isalnum(chNext)) {
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levelNext++;
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}
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else if ((style & 0xf) == SCE_4GL_END && (ch == 'e' || ch == 'f')) {
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levelNext--;
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}
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if (atEOL) {
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int levelUse = levelCurrent;
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if (foldAtElse) {
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levelUse = levelMinCurrent;
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}
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int lev = levelUse | levelNext << 16;
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if (visibleChars == 0 && foldCompact)
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lev |= SC_FOLDLEVELWHITEFLAG;
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if (levelUse < levelNext)
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lev |= SC_FOLDLEVELHEADERFLAG;
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if (lev != styler.LevelAt(lineCurrent)) {
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styler.SetLevel(lineCurrent, lev);
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}
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lineCurrent++;
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levelCurrent = levelNext;
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levelMinCurrent = levelCurrent;
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visibleChars = 0;
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}
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if (!isspacechar(ch))
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visibleChars++;
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}
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}
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static void Fold4glDoc(Sci_PositionU startPos, Sci_Position length, int initStyle, WordList *[],
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Accessor &styler) {
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FoldNoBox4glDoc(startPos, length, initStyle, styler);
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}
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static const char * const FglWordLists[] = {
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"Primary keywords and identifiers",
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"Secondary keywords and identifiers",
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"Documentation comment keywords",
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"Unused",
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"Global classes and typedefs",
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0,
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};
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LexerModule lmProgress(SCLEX_PROGRESS, Colourise4glDoc, "progress", Fold4glDoc, FglWordLists);
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