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294 lines
8.4 KiB
294 lines
8.4 KiB
// Scintilla source code edit control |
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/** @file LexAVS.cxx |
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** Lexer for AviSynth. |
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**/ |
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// Copyright 2012 by Bruno Barbieri <brunorex@gmail.com> |
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// Heavily based on LexPOV by Neil Hodgson |
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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 <string> |
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#include <string_view> |
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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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using namespace Lexilla; |
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static inline bool IsAWordChar(const 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 isalpha(ch) || (ch != ' ' && ch != '\n' && ch != '(' && ch != '.' && ch != ','); |
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} |
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static inline bool IsANumberChar(int ch) { |
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// Not exactly following number definition (several dots are seen as OK, etc.) |
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// but probably enough in most cases. |
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return (ch < 0x80) && |
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(isdigit(ch) || ch == '.' || ch == '-' || ch == '+'); |
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} |
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static void ColouriseAvsDoc( |
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Sci_PositionU startPos, |
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Sci_Position length, |
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int initStyle, |
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WordList *keywordlists[], |
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Accessor &styler) { |
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WordList &keywords = *keywordlists[0]; |
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WordList &filters = *keywordlists[1]; |
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WordList &plugins = *keywordlists[2]; |
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WordList &functions = *keywordlists[3]; |
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WordList &clipProperties = *keywordlists[4]; |
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WordList &userDefined = *keywordlists[5]; |
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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_AVS_COMMENTBLOCK || initStyle == SCE_AVS_COMMENTBLOCKN) { |
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blockCommentLevel = styler.GetLineState(currentLine - 1); |
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} |
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// Do not leak onto next line |
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if (initStyle == SCE_AVS_COMMENTLINE) { |
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initStyle = SCE_AVS_DEFAULT; |
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} |
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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.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_AVS_COMMENTBLOCK || sc.state == SCE_AVS_COMMENTBLOCKN) { |
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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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// Determine if the current state should terminate. |
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if (sc.state == SCE_AVS_OPERATOR) { |
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sc.SetState(SCE_AVS_DEFAULT); |
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} else if (sc.state == SCE_AVS_NUMBER) { |
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// We stop the number definition on non-numerical non-dot non-sign char |
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if (!IsANumberChar(sc.ch)) { |
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sc.SetState(SCE_AVS_DEFAULT); |
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} |
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} else if (sc.state == SCE_AVS_IDENTIFIER) { |
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if (!IsAWordChar(sc.ch)) { |
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char s[100]; |
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sc.GetCurrentLowered(s, sizeof(s)); |
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if (keywords.InList(s)) { |
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sc.ChangeState(SCE_AVS_KEYWORD); |
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} else if (filters.InList(s)) { |
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sc.ChangeState(SCE_AVS_FILTER); |
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} else if (plugins.InList(s)) { |
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sc.ChangeState(SCE_AVS_PLUGIN); |
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} else if (functions.InList(s)) { |
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sc.ChangeState(SCE_AVS_FUNCTION); |
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} else if (clipProperties.InList(s)) { |
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sc.ChangeState(SCE_AVS_CLIPPROP); |
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} else if (userDefined.InList(s)) { |
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sc.ChangeState(SCE_AVS_USERDFN); |
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} |
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sc.SetState(SCE_AVS_DEFAULT); |
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} |
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} else if (sc.state == SCE_AVS_COMMENTBLOCK) { |
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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_AVS_DEFAULT); |
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} |
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} |
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} else if (sc.state == SCE_AVS_COMMENTBLOCKN) { |
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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_AVS_DEFAULT); |
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} |
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} |
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} else if (sc.state == SCE_AVS_COMMENTLINE) { |
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if (sc.atLineEnd) { |
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sc.ForwardSetState(SCE_AVS_DEFAULT); |
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} |
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} else if (sc.state == SCE_AVS_STRING) { |
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if (sc.ch == '\"') { |
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sc.ForwardSetState(SCE_AVS_DEFAULT); |
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} |
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} else if (sc.state == SCE_AVS_TRIPLESTRING) { |
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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_AVS_DEFAULT); |
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} |
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} |
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// Determine if a new state should be entered. |
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if (sc.state == SCE_AVS_DEFAULT) { |
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if (IsADigit(sc.ch) || (sc.ch == '.' && IsADigit(sc.chNext))) { |
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sc.SetState(SCE_AVS_NUMBER); |
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} else if (IsADigit(sc.ch) || (sc.ch == ',' && IsADigit(sc.chNext))) { |
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sc.Forward(); |
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sc.SetState(SCE_AVS_NUMBER); |
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} else if (sc.Match('/', '*')) { |
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blockCommentLevel = 1; |
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sc.SetState(SCE_AVS_COMMENTBLOCK); |
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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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blockCommentLevel = 1; |
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sc.SetState(SCE_AVS_COMMENTBLOCKN); |
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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.ch == '#') { |
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sc.SetState(SCE_AVS_COMMENTLINE); |
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} else if (sc.ch == '\"') { |
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if (sc.Match("\"\"\"")) { |
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sc.SetState(SCE_AVS_TRIPLESTRING); |
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} else { |
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sc.SetState(SCE_AVS_STRING); |
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} |
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} else if (isoperator(static_cast<char>(sc.ch))) { |
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sc.SetState(SCE_AVS_OPERATOR); |
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} else if (IsAWordStart(sc.ch)) { |
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sc.SetState(SCE_AVS_IDENTIFIER); |
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} |
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} |
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} |
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// End of file: complete any pending changeState |
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if (sc.state == SCE_AVS_IDENTIFIER) { |
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if (!IsAWordChar(sc.ch)) { |
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char s[100]; |
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sc.GetCurrentLowered(s, sizeof(s)); |
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if (keywords.InList(s)) { |
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sc.ChangeState(SCE_AVS_KEYWORD); |
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} else if (filters.InList(s)) { |
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sc.ChangeState(SCE_AVS_FILTER); |
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} else if (plugins.InList(s)) { |
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sc.ChangeState(SCE_AVS_PLUGIN); |
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} else if (functions.InList(s)) { |
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sc.ChangeState(SCE_AVS_FUNCTION); |
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} else if (clipProperties.InList(s)) { |
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sc.ChangeState(SCE_AVS_CLIPPROP); |
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} else if (userDefined.InList(s)) { |
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sc.ChangeState(SCE_AVS_USERDFN); |
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} |
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sc.SetState(SCE_AVS_DEFAULT); |
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} |
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} |
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sc.Complete(); |
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} |
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static void FoldAvsDoc( |
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Sci_PositionU startPos, |
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Sci_Position length, |
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int initStyle, |
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WordList *[], |
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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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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 levelPrev = styler.LevelAt(lineCurrent) & SC_FOLDLEVELNUMBERMASK; |
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int levelCurrent = levelPrev; |
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char chNext = 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 = 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 && style == SCE_AVS_COMMENTBLOCK) { |
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if (stylePrev != SCE_AVS_COMMENTBLOCK) { |
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levelCurrent++; |
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} else if ((styleNext != SCE_AVS_COMMENTBLOCK) && !atEOL) { |
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// Comments don't end at end of line and the next character may be unstyled. |
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levelCurrent--; |
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} |
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} |
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if (foldComment && style == SCE_AVS_COMMENTBLOCKN) { |
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if (stylePrev != SCE_AVS_COMMENTBLOCKN) { |
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levelCurrent++; |
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} else if ((styleNext != SCE_AVS_COMMENTBLOCKN) && !atEOL) { |
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// Comments don't end at end of line and the next character may be unstyled. |
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levelCurrent--; |
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} |
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} |
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if (style == SCE_AVS_OPERATOR) { |
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if (ch == '{') { |
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levelCurrent++; |
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} else if (ch == '}') { |
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levelCurrent--; |
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} |
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} |
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if (atEOL) { |
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int lev = levelPrev; |
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if (visibleChars == 0 && foldCompact) |
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lev |= SC_FOLDLEVELWHITEFLAG; |
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if ((levelCurrent > levelPrev) && (visibleChars > 0)) |
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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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levelPrev = 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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// Fill in the real level of the next line, keeping the current flags as they will be filled in later |
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int flagsNext = styler.LevelAt(lineCurrent) & ~SC_FOLDLEVELNUMBERMASK; |
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styler.SetLevel(lineCurrent, levelPrev | flagsNext); |
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} |
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static const char * const avsWordLists[] = { |
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"Keywords", |
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"Filters", |
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"Plugins", |
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"Functions", |
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"Clip properties", |
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"User defined functions", |
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0, |
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}; |
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LexerModule lmAVS(SCLEX_AVS, ColouriseAvsDoc, "avs", FoldAvsDoc, avsWordLists);
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