static void
add_general_tag (char* tag_name, Preference text_pref,
Preference background_pref, Preference font_pref)
{
GdkRGBA *fg_color, *bg_color;
char *font;
char *key;
/* initialize tag preferences */
/* text color */
key = preferences_get_key (text_pref);
fg_color = preferences_get_color (key);
preferences_notify_add (key, changed_text, tag_name);
g_free (key);
/* base color */
key = preferences_get_key (background_pref);
bg_color = preferences_get_color (key);
preferences_notify_add (key, changed_background, tag_name);
g_free (key);
/* font */
key = preferences_get_key (font_pref);
font = preferences_get_string (key);
preferences_notify_add (key, changed_font, tag_name);
g_free (key);
highlight_add_tag (tag_name, fg_color, bg_color, font);
}
static void highlight_add_tags (guint id)
{
/*
* don't call this function if you think there might be a tag by this
* name already, call highlight_check_tags first if that's the case
*/
int i;
for (i = 0; i < HIGHLIGHT_MATCHES; i++) {
GdkRGBA *text, *background;
char *font;
text = preferences_get_color (
preferences_get_highlight_match_key (id, i,
PREF_HIGHLIGHT_MATCH_TEXT_COLOR));
background = preferences_get_color (
preferences_get_highlight_match_key (id, i,
PREF_HIGHLIGHT_MATCH_BASE_COLOR));
font = preferences_get_string (
preferences_get_highlight_match_key (id, i,
PREF_HIGHLIGHT_MATCH_FONT));
highlight_add_tag (mangle_name (id, i), text, background, font);
}
}
void
highlight_apply (GtkTextBuffer *buffer, GtkTextIter *start,
GtkTextIter *end)
{
/* Use a finite state machine to highlighting a code. */
gchar *text;
gint i;
gchar *lex;
gint lex_len;
gint state;
GtkTextIter st, ed;
text = gtk_text_iter_get_text (start, end);
lex = (gchar *) g_malloc (MAX_LEX_SIZE);
lex_len = 0;
state = 0;
gtk_text_buffer_get_start_iter (buffer, &st);
gtk_text_buffer_get_end_iter (buffer, &ed);
gtk_text_buffer_apply_tag_by_name (buffer, CODE_TAG_NONE, &st, &ed);
for (i = 0; text[i]; i++)
{
if ((!CHAR (text[i]) && !DIGIT (text[i])) || text[i + 1] == 0)
{
gint start_offset;
gchar *tag;
start_offset = i - lex_len;
tag = CODE_TAG_NONE;
switch (state)
{
case 0:
if (text[i] == '\"')
{
state = 1;
lex[lex_len++] = text[i];
}
else if (text[i] == '\'')
{
state = 2;
lex[lex_len++] = text[i];
}
else if (text[i] == '/')
{
state = 3;
lex[lex_len++] = text[i];
}
else if (text[i + 1] == 0 && (CHAR (text[i]) ||
DIGIT (text[i])))
lex[lex_len++] = text[i];
break;
case 1:
lex[lex_len++] = text[i];
if (text[i] == '\"')
{
int s = 0;
int j = lex_len - 2;
for ( ; j >= 0; j--)
if (lex[j] == '\\')
s++;
else
break;
if (s % 2 == 0) {
state = 0;
tag = CODE_TAG_STRING;
}
}
break;
case 2:
lex[lex_len++] = text[i];
if (text[i] == '\'')
{
int s = 0;
int j = lex_len - 2;
for ( ; j >= 0; j--)
if (lex[j] == '\\')
s++;
else
break;
if (s % 2 == 0) {
state = 0;
tag = CODE_TAG_STRING;
}
}
break;
case 3:
lex[lex_len++] = text[i];
if (text[i] == '/')
state = 4;
else if (text[i] == '*')
state = 5;
else {
state = 0;
tag = CODE_TAG_NONE;
}
break;
case 4:
lex[lex_len++] = text[i];
if (text[i] == '\n') {
state = 0;
tag = CODE_TAG_COMMENT;
}
break;
case 5:
lex[lex_len++] = text[i];
if (text[i] == '*')
state = 6;
break;
case 6:
lex[lex_len++] = text[i];
if (text[i] == '/' && text[i - 1] == '*') {
state = 0;
tag = CODE_TAG_COMMENT;
}
break;
}
lex[lex_len] = 0;
if (state != 0)
continue;
if (tag == CODE_TAG_NONE) {
if (DIGIT (lex[0]))
tag = CODE_TAG_CONSTANT;
else if (lex[0] == '#')
tag = CODE_TAG_PREPROCESSOR;
else if (CHAR (lex[0]) && lex_len <= MAX_KEYWORD_LENTH && highlight_is_keyword (lex))
tag = CODE_TAG_KEYWORD;
}
highlight_add_tag (buffer, start, start_offset, lex_len, tag);
lex_len = 0;
}
else
lex[lex_len++] = text[i];
}
g_free (lex);
}
