From 244a54a18b7db6af177c9d10f3224772f08d7484 Mon Sep 17 00:00:00 2001 From: Robin Haberkorn Date: Mon, 9 Dec 2024 12:58:25 +0300 Subject: implemented Scintilla lexer for SciTECO code, i.e. TECO syntax highlighting * this works by embedding the SciTECO parser and driving it always (exclusively) in parse-only mode. * A new teco_state_t::style determines the Scintilla style for any character accepted in the given state. * Therefore, the SciTECO lexer is always 100% exact and corresponds to the current SciTECO grammer - it does not have to be maintained separately. There are a few exceptions and tweaks, though. * The contents of curly-brace escapes (`@^Uq{...}`) are rendered as ordinary code using a separate parser instance. This can be disabled with the lexer.sciteco.macrodef property. Unfortunately, SciTECO does not currently allow setting lexer properties (FIXME). * Labels and comments are currently styled the same. This could change in the future once we introduce real comments. * Lexers are usually implemented in C++, but I did not want to draw in C++. Especially not since we'd have to include parser.h and other SciTECO headers, that really do not want to keep C++-compatible. Instead, the lexer is implemented "in the container". @ES/SCI_SETILEXER/sciteco/ is internally translated to SCI_SETILEXER(NULL) and we get Scintilla notifications when styling the view becomes necessary. This is then centrally forwarded to the teco_lexer_style() which uses the ordinary teco_view_ssm() API for styling. * Once the command line becomes a Scintilla view even on Curses, we can enabled syntax highlighting of the command line macro. --- src/view.c | 13 +++++++++++++ 1 file changed, 13 insertions(+) (limited to 'src/view.c') diff --git a/src/view.c b/src/view.c index 7cdc987..f14c658 100644 --- a/src/view.c +++ b/src/view.c @@ -46,6 +46,7 @@ #include "qreg.h" #include "eol.h" #include "memory.h" +#include "lexer.h" #include "view.h" /** @memberof teco_view_t */ @@ -636,3 +637,15 @@ teco_view_get_character(teco_view_t *ctx, gsize pos, gsize len) */ return (gint32)g_utf8_get_char_validated(buf, -1); } + +void +teco_view_process_notify(teco_view_t *ctx, SCNotification *notify) +{ +#ifdef DEBUG + g_printf("SCINTILLA NOTIFY: code=%d\n", notify->nmhdr.code); +#endif + + if (notify->nmhdr.code == SCN_STYLENEEDED) + /* Lexing in the container: only used for SciTECO */ + teco_lexer_style(ctx, notify->position); +} -- cgit v1.2.3