Adding the ability to colour four elements of nano's interface differently.

Idea and original patch by Mark Majeres.


git-svn-id: svn://svn.savannah.gnu.org/nano/trunk/nano@4827 35c25a1d-7b9e-4130-9fde-d3aeb78583b8

ChangeLog

+2014-05-03  Benno Schulenberg  <bensberg@justemail.net>
+	* src/*.h, src/*.c: Add the ability to colour four elements of
+	nano's interface differently: title bar, status bar, key combo,
+	and function tag.  Idea and original patch by Mark Majeres.
+
 2014-04-30  Benno Schulenberg  <bensberg@justemail.net>
 	* src/*, doc/*: Update the years in the copyright notices -- there
 	were releases in 2010, 2011, and 2013, and there will be in 2014.

src/color.c

@@ -38,10 +38,38 @@
 void set_colorpairs(void)
 {
     const syntaxtype *this_syntax = syntaxes;
+    bool bright = FALSE, defok = FALSE;
+    short fg, bg;
+    size_t i;
+
+    start_color();
+
+#ifdef HAVE_USE_DEFAULT_COLORS
+    /* Use the default colors, if available. */
+    defok = (use_default_colors() != ERR);
+#endif
+
+    for (i = 0; i < NUMBER_OF_ELEMENTS; i++) {
+	if (parse_color_names(specified_color_combo[i], &fg, &bg, &bright)) {
+	    if (fg == -1 && !defok)
+		fg = COLOR_WHITE;
+	    if (bg == -1 && !defok)
+		bg = COLOR_BLACK;
+	    init_pair(i + 1, fg, bg);
+	    interface_color_pair[i] = COLOR_PAIR(i + 1);
+	}
+	else if (i != FUNCTION_TAG)
+	    interface_color_pair[i] = reverse_attr;
+
+	if (specified_color_combo[i] != NULL) {
+	    free(specified_color_combo[i]);
+	    specified_color_combo[i] = NULL;
+	}
+    }
 
     for (; this_syntax != NULL; this_syntax = this_syntax->next) {
 	colortype *this_color = this_syntax->color;
-	int color_pair = 1;
+	int color_pair = NUMBER_OF_ELEMENTS + 1;
 
 	for (; this_color != NULL; this_color = this_color->next) {
 	    const colortype *beforenow = this_syntax->color;
@@ -70,15 +98,9 @@ void color_init(void)
 
     if (has_colors()) {
 	const colortype *tmpcolor;
-#ifdef HAVE_USE_DEFAULT_COLORS
-	bool defok;
-#endif
-
-	start_color();
-
 #ifdef HAVE_USE_DEFAULT_COLORS
 	/* Use the default colors, if available. */
-	defok = (use_default_colors() != ERR);
+	bool defok = (use_default_colors() != ERR);
 #endif
 
 	for (tmpcolor = openfile->colorstrings; tmpcolor != NULL;

src/global.c

@@ -205,6 +205,12 @@ regmatch_t regmatches[10];
 
 int reverse_attr = A_REVERSE;
 	/* The curses attribute we use for reverse video. */
+#ifndef DISABLE_COLOR
+char* specified_color_combo[] = {};
+	/* The color combinations as specified in the rcfile. */
+#endif
+int interface_color_pair[] = {};
+	/* The processed color pairs for the interface elements. */
 
 char *homedir = NULL;
 	/* The user's home directory, from $HOME or /etc/passwd. */

src/nano.c

@@ -2657,6 +2657,15 @@ int main(int argc, char **argv)
     mouse_init();
 #endif
 
+#ifndef DISABLE_COLOR
+    set_colorpairs();
+#else
+    interface_color_pair[TITLE_BAR] = reverse_attr;
+    interface_color_pair[STATUS_BAR] = reverse_attr;
+    interface_color_pair[KEY_COMBO] = reverse_attr;
+    interface_color_pair[FUNCTION_TAG] = A_NORMAL;
+#endif
+
 #ifdef DEBUG
     fprintf(stderr, "Main: open file\n");
 #endif

src/nano.h

@@ -479,6 +479,15 @@ typedef struct subnfunc {
 	/* Next item in the list. */
 } subnfunc;
 
+/* The elements of the interface that can be colored differently. */
+enum
+{
+    TITLE_BAR = 0,
+    STATUS_BAR,
+    KEY_COMBO,
+    FUNCTION_TAG,
+    NUMBER_OF_ELEMENTS
+};
 
 /* Enumeration to be used in flags table. See FLAGBIT and FLAGOFF
  * definitions. */

src/prompt.c

@@ -853,7 +853,7 @@ void update_statusbar_line(const char *curranswer, size_t index)
     index = strnlenpt(curranswer, index);
     page_start = get_statusbar_page_start(start_col, start_col + index);
 
-    wattron(bottomwin, reverse_attr);
+    wattron(bottomwin, interface_color_pair[TITLE_BAR]);
 
     blank_statusbar();
 
@@ -866,7 +866,7 @@ void update_statusbar_line(const char *curranswer, size_t index)
     waddstr(bottomwin, expanded);
     free(expanded);
 
-    wattroff(bottomwin, reverse_attr);
+    wattroff(bottomwin, interface_color_pair[TITLE_BAR]);
     statusbar_pww = statusbar_xplustabs();
     reset_statusbar_cursor();
     wnoutrefresh(bottomwin);
@@ -1273,12 +1273,12 @@ int do_yesno_prompt(bool all, const char *msg)
 	onekey("^C", _("Cancel"), width);
     }
 
-    wattron(bottomwin, reverse_attr);
+    wattron(bottomwin, interface_color_pair[TITLE_BAR]);
 
     blank_statusbar();
     mvwaddnstr(bottomwin, 0, 0, msg, actual_x(msg, COLS - 1));
 
-    wattroff(bottomwin, reverse_attr);
+    wattroff(bottomwin, interface_color_pair[TITLE_BAR]);
 
     /* Refresh the edit window and the statusbar before getting
      * input. */

src/proto.h

@@ -131,6 +131,10 @@ extern regmatch_t regmatches[10];
 #endif
 
 extern int reverse_attr;
+#ifndef DISABLE_COLOR
+extern char* specified_color_combo[NUMBER_OF_ELEMENTS];
+#endif
+extern int interface_color_pair[NUMBER_OF_ELEMENTS];
 
 extern char *homedir;
 
@@ -551,6 +555,7 @@ void parse_magic_syntax(char *ptr);
 void parse_include(char *ptr);
 short color_to_short(const char *colorname, bool *bright);
 void parse_colors(char *ptr, bool icase);
+bool parse_color_names(char *combostr, short *fg, short *bg, bool *bright);
 void reset_multis(filestruct *fileptr, bool force);
 void alloc_multidata_if_needed(filestruct *fileptr);
 #endif

src/rcfile.c

@@ -99,6 +99,12 @@ static const rcoption rcopts[] = {
     {"whitespace", 0},
     {"wordbounds", WORD_BOUNDS},
     {"softwrap", SOFTWRAP},
+#endif
+#ifndef DISABLE_COLOR
+    {"titlecolor", 0},
+    {"statuscolor", 0},
+    {"keycolor", 0},
+    {"functioncolor", 0},
 #endif
     {NULL, 0}
 };
@@ -703,7 +709,7 @@ short color_to_short(const char *colorname, bool *bright)
 void parse_colors(char *ptr, bool icase)
 {
     short fg, bg;
-    bool bright = FALSE, no_fgcolor = FALSE;
+    bool bright = FALSE;
     char *fgstr;
 
     assert(ptr != NULL);
@@ -721,36 +727,8 @@ void parse_colors(char *ptr, bool icase)
 
     fgstr = ptr;
     ptr = parse_next_word(ptr);
-
-    if (strchr(fgstr, ',') != NULL) {
-	char *bgcolorname;
-
-	strtok(fgstr, ",");
-	bgcolorname = strtok(NULL, ",");
-	if (bgcolorname == NULL) {
-	    /* If we have a background color without a foreground color,
-	     * parse it properly. */
-	    bgcolorname = fgstr + 1;
-	    no_fgcolor = TRUE;
-	}
-	if (strncasecmp(bgcolorname, "bright", 6) == 0) {
-	    rcfile_error(
-		N_("Background color \"%s\" cannot be bright"),
-		bgcolorname);
-	    return;
-	}
-	bg = color_to_short(bgcolorname, &bright);
-    } else
-	bg = -1;
-
-    if (!no_fgcolor) {
-	fg = color_to_short(fgstr, &bright);
-
-	/* Don't try to parse screwed-up foreground colors. */
-	if (fg == -1)
-	    return;
-    } else
-	fg = -1;
+    if (!parse_color_names(fgstr, &fg, &bg, &bright))
+	return;
 
     if (*ptr == '\0') {
 	rcfile_error(N_("Missing regex string"));
@@ -862,6 +840,44 @@ void parse_colors(char *ptr, bool icase)
     }
 }
 
+/* Parse the color name, or pair of color names, in combostr. */
+bool parse_color_names(char *combostr, short *fg, short *bg, bool *bright)
+{
+    bool no_fgcolor = FALSE;
+
+    if (combostr == NULL)
+	return false;
+
+    if (strchr(combostr, ',') != NULL) {
+	char *bgcolorname;
+	strtok(combostr, ",");
+	bgcolorname = strtok(NULL, ",");
+	if (bgcolorname == NULL) {
+	    /* If we have a background color without a foreground color,
+	     * parse it properly. */
+	    bgcolorname = combostr + 1;
+	    no_fgcolor = TRUE;
+	}
+	if (strncasecmp(bgcolorname, "bright", 6) == 0) {
+	    rcfile_error(N_("Background color \"%s\" cannot be bright"), bgcolorname);
+	    return false;
+	}
+	*bg = color_to_short(bgcolorname, bright);
+    } else
+	*bg = -1;
+
+    if (!no_fgcolor) {
+	*fg = color_to_short(combostr, bright);
+
+	/* Don't try to parse screwed-up foreground colors. */
+	if (*fg == -1)
+	    return false;
+    } else
+	*fg = -1;
+
+    return true;
+}
+
 /* Parse the header-line regex that may influence the choice of syntax. */
 void parse_headers(char *ptr)
 {
@@ -1149,6 +1165,17 @@ void parse_rcfile(FILE *rcstream
 			    break;
 			}
 
+#ifndef DISABLE_COLOR
+			if (strcasecmp(rcopts[i].name, "titlecolor") == 0)
+			    specified_color_combo[TITLE_BAR] = option;
+			else if (strcasecmp(rcopts[i].name, "statuscolor") == 0)
+			    specified_color_combo[STATUS_BAR] = option;
+			else if (strcasecmp(rcopts[i].name, "keycolor") == 0)
+			    specified_color_combo[KEY_COMBO] = option;
+			else if (strcasecmp(rcopts[i].name, "functioncolor") == 0)
+			    specified_color_combo[FUNCTION_TAG] = option;
+			else
+#endif
 #ifndef DISABLE_OPERATINGDIR
 			if (strcasecmp(rcopts[i].name, "operatingdir") == 0)
 			    operating_dir = option;
@@ -1357,10 +1384,6 @@ void do_rcfile(void)
 	while (getchar() != '\n')
 	    ;
     }
-
-#ifndef DISABLE_COLOR
-    set_colorpairs();
-#endif
 }
 
 #endif /* !DISABLE_NANORC */

src/winio.c

@@ -2104,7 +2104,7 @@ void titlebar(const char *path)
 
     assert(path != NULL || openfile->filename != NULL);
 
-    wattron(topwin, reverse_attr);
+    wattron(topwin, interface_color_pair[TITLE_BAR]);
 
     blank_titlebar();
 
@@ -2235,7 +2235,7 @@ void titlebar(const char *path)
 	}
     }
 
-    wattroff(topwin, reverse_attr);
+    wattroff(topwin, interface_color_pair[TITLE_BAR]);
 
     wnoutrefresh(topwin);
     reset_cursor();
@@ -2306,12 +2306,12 @@ void statusbar(const char *msg, ...)
     start_x = (COLS - foo_len - 4) / 2;
 
     wmove(bottomwin, 0, start_x);
-    wattron(bottomwin, reverse_attr);
+    wattron(bottomwin, interface_color_pair[STATUS_BAR]);
     waddstr(bottomwin, "[ ");
     waddstr(bottomwin, foo);
     free(foo);
     waddstr(bottomwin, " ]");
-    wattroff(bottomwin, reverse_attr);
+    wattroff(bottomwin, interface_color_pair[STATUS_BAR]);
     wnoutrefresh(bottomwin);
     reset_cursor();
     wnoutrefresh(edit);
@@ -2411,9 +2411,9 @@ void onekey(const char *keystroke, const char *desc, size_t len)
 
     assert(keystroke != NULL && desc != NULL);
 
-    wattron(bottomwin, reverse_attr);
+    wattron(bottomwin, interface_color_pair[KEY_COMBO]);
     waddnstr(bottomwin, keystroke, actual_x(keystroke, len));
-    wattroff(bottomwin, reverse_attr);
+    wattroff(bottomwin, interface_color_pair[KEY_COMBO]);
 
     if (len > keystroke_len)
 	len -= keystroke_len;
@@ -2421,8 +2421,10 @@ void onekey(const char *keystroke, const char *desc, size_t len)
 	len = 0;
 
     if (len > 0) {
+	wattron(bottomwin, interface_color_pair[FUNCTION_TAG]);
 	waddch(bottomwin, ' ');
 	waddnstr(bottomwin, desc, actual_x(desc, len));
+	wattroff(bottomwin, interface_color_pair[FUNCTION_TAG]);
     }
 }