Geany disabled C preprocessor highlighter

c-preproc-hl.c

/*
 * Copyright 2015 Colomban Wendling <colomban@geany.org>
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

#include <glib.h>
#include <geanyplugin.h>
#include <SciLexer.h>


GeanyPlugin    *geany_plugin;
GeanyData      *geany_data;
GeanyFunctions *geany_functions;

PLUGIN_VERSION_CHECK (211) /* FIXME */
PLUGIN_SET_INFO ("C Proprocessor highlight", "Highlights disabled C code",
                 "0.1", "Colomban Wendling <colomban@geany.org>")


#define BG_COLOR_ADD -0x111111
#define FG_COLOR_ADD +0x333333

#define ACTIVITY_FLAG 0x40 /* see LexCPP */


static void on_filetype_set (GObject       *obj,
                             GeanyDocument *doc,
                             GeanyFiletype *filetype_old,
                             gpointer       user_data)
{
  sptr_t lexer = scintilla_send_message (doc->editor->sci, SCI_GETLEXER, 0, 0);

  if (lexer == SCLEX_CPP) {
    uptr_t i;

    for (i = 0; i < ACTIVITY_FLAG; i++) {
      sptr_t v;
      
      v = scintilla_send_message (doc->editor->sci, SCI_STYLEGETBACK, i, 0);
      scintilla_send_message (doc->editor->sci, SCI_STYLESETBACK,
                              i | ACTIVITY_FLAG, v + BG_COLOR_ADD);
      v = scintilla_send_message (doc->editor->sci, SCI_STYLEGETFORE, i, 0);
      scintilla_send_message (doc->editor->sci, SCI_STYLESETFORE,
                              i | ACTIVITY_FLAG, v + FG_COLOR_ADD);

#define COPY_SCI_STYLE(which)                                                 \
  v = scintilla_send_message (doc->editor->sci, SCI_STYLEGET##which, i, 0);   \
  scintilla_send_message (doc->editor->sci, SCI_STYLESET##which,              \
                          i | ACTIVITY_FLAG, v);

      COPY_SCI_STYLE (BOLD)
      COPY_SCI_STYLE (ITALIC)
      COPY_SCI_STYLE (SIZE)
      COPY_SCI_STYLE (EOLFILLED)
      COPY_SCI_STYLE (UNDERLINE)
      COPY_SCI_STYLE (CASE)
      COPY_SCI_STYLE (VISIBLE)

#undef COPY_SCI_STYLE
    }
  }
}

void plugin_init (GeanyData *data)
{
  plugin_signal_connect (geany_plugin, NULL, "document-filetype-set", TRUE,
                         G_CALLBACK (on_filetype_set), NULL);
}

void plugin_cleanup (void)
{
}

Makefile

#!/usr/bin/make -f

PLUGIN = c-preproc-hl

VPATH ?= .

# fetch from https://github.com/b4n/geany-plugin.mk
include $(VPATH)/geany-plugin.mk