1 files changed, 46 insertions, 54 deletions

diff --git a/src/interface-curses/interface.c b/src/interface-curses/interface.c
index 365a096..4f00bcf 100644
--- a/src/interface-curses/interface.c
+++ b/src/interface-curses/interface.c
@@ -233,63 +233,49 @@ static struct {
  * Scinterm no longer initializes all color pairs for all combinations of
  * the builtin foreground and background colors.
  * Since curses does not guarantee any number of color pairs, we cannot do that either.
- * Instead we allocate color pairs beginnig at the second half of
- * color pair space on demand (similar to what Scinterm does).
- *
- * @note Scinterm now also has scintilla_set_color_offsets(),
- * so we could use the color pairs beginning with 1 as well.
+ * Instead we allocate color pairs in the first half of
+ * color pair space on demand, while the second half is reserved to Scinterm.
  *
+ * @param attr attributes to modify (for supporting monochrome terminals)
  * @param fg curses foreground color
  * @param bg curses background color
  * @return curses color pair number
  */
 static gshort
-teco_color_pair(gshort fg, gshort bg)
+teco_color_pair(attr_t *attr, gshort fg, gshort bg)
 {
-	static gshort allocated_pairs = 0;
+	static gshort next_pair = 1;
+
+	/*
+	 * Basic support for monochrome terminals:
+	 * Every background, that is not black is assumed to be a
+	 * dark-on-bright area, rendered in reverse.
+	 * This will at least work with the terminal.tes and contrast.tes
+	 * color schemes.
+	 */
+	if (!has_colors()) {
+		if (bg != COLOR_BLACK)
+			*attr |= A_REVERSE;
+		return 0;
+	}
 
 	G_STATIC_ASSERT(sizeof(gshort)*2 <= sizeof(guint));
 	gpointer key = GUINT_TO_POINTER(((guint)fg << 8*sizeof(bg)) | bg);
 	gpointer value = g_hash_table_lookup(teco_interface.pair_table, key);
 	if (G_LIKELY(value != NULL))
 		return GPOINTER_TO_UINT(value);
-	/*
-	 * We are still adding colors with COLOR_PAIR(), which allows
-	 * at most 256 color pairs (1-255).
-	 */
-	gshort new_pair = MIN(COLOR_PAIRS, 256)/2 + allocated_pairs;
-	if (G_UNLIKELY(new_pair >= 256))
+	if (G_UNLIKELY(next_pair >= MIN(COLOR_PAIRS, G_MAXSHORT)))
 		return 0;
-	allocated_pairs++;
-	init_pair(new_pair, fg, bg);
-	g_hash_table_insert(teco_interface.pair_table, key, GUINT_TO_POINTER(new_pair));
-	return new_pair;
+	init_pair(next_pair, fg, bg);
+	g_hash_table_insert(teco_interface.pair_table, key, GUINT_TO_POINTER(next_pair));
+	return next_pair++;
 }
 
-/**
- * Curses attribute for the color combination
- * according to the color pairs initialized by
- * Scinterm.
- * This is equivalent to Scinterm's internal term_color_attr().
- *
- * @param fg foreground color
- * @param bg background color
- * @return curses attribute
- */
-static inline attr_t
-teco_color_attr(gshort fg, gshort bg)
+static inline gint
+teco_wattr_set(WINDOW *win, attr_t attr, gshort fg, gshort bg)
 {
-	if (has_colors())
-		return COLOR_PAIR(teco_color_pair(fg, bg));
-
-	/*
-	 * Basic support for monochrome terminals:
-	 * Every background, that is not black is assumed to be a
-	 * dark-on-bright area, rendered in reverse.
-	 * This will at least work with the terminal.tes and contrast.tes
-	 * color schemes.
-	 */
-	return bg != COLOR_BLACK ? A_REVERSE : 0;
+	gshort pair = teco_color_pair(&attr, fg, bg);
+	return wattr_set(win, attr, pair, NULL);
 }
 
 /**
@@ -760,6 +746,8 @@ teco_interface_init_interactive(GError **error)
 
 	teco_interface.pair_table = g_hash_table_new(g_direct_hash, g_direct_equal);
 	start_color();
+	/* Scinterm uses shorts for color pairs, so G_MAXSHORT is the maximum */
+	scintilla_set_color_offsets(0, MIN(COLOR_PAIRS, G_MAXSHORT)/2);
 
 	/*
 	 * On UNIX terminals, the escape key is usually
@@ -950,7 +938,7 @@ teco_interface_msg_literal(teco_msg_t type, const gchar *str, gsize len)
 	teco_interface_stdio_msg(type, str, len);
 #endif
 
-	short fg, bg;
+	gshort fg, bg;
 
 	fg = teco_rgb2curses(teco_interface_ssm(SCI_STYLEGETBACK, STYLE_DEFAULT, 0));
 
@@ -972,7 +960,7 @@ teco_interface_msg_literal(teco_msg_t type, const gchar *str, gsize len)
 	}
 
 	wmove(teco_interface.msg_window, 0, 0);
-	wattrset(teco_interface.msg_window, teco_color_attr(fg, bg));
+	teco_wattr_set(teco_interface.msg_window, 0, fg, bg);
 	teco_curses_format_str(teco_interface.msg_window, str, len, -1);
 	teco_curses_clrtobot(teco_interface.msg_window);
 }
@@ -983,11 +971,11 @@ teco_interface_msg_clear(void)
 	if (!teco_interface.input_pad) /* batch mode */
 		return;
 
-	short fg = teco_rgb2curses(teco_interface_ssm(SCI_STYLEGETBACK, STYLE_DEFAULT, 0));
-	short bg = teco_rgb2curses(teco_interface_ssm(SCI_STYLEGETFORE, STYLE_DEFAULT, 0));
+	gshort fg = teco_rgb2curses(teco_interface_ssm(SCI_STYLEGETBACK, STYLE_DEFAULT, 0));
+	gshort bg = teco_rgb2curses(teco_interface_ssm(SCI_STYLEGETFORE, STYLE_DEFAULT, 0));
 
 	wmove(teco_interface.msg_window, 0, 0);
-	wattrset(teco_interface.msg_window, teco_color_attr(fg, bg));
+	teco_wattr_set(teco_interface.msg_window, 0, fg, bg);
 	teco_curses_clrtobot(teco_interface.msg_window);
 }
 
@@ -1161,11 +1149,11 @@ teco_interface_draw_info(void)
 	 * the current buffer's STYLE_DEFAULT.
 	 * The same style is used for MSG_USER messages.
 	 */
-	short fg = teco_rgb2curses(teco_interface_ssm(SCI_STYLEGETBACK, STYLE_DEFAULT, 0));
-	short bg = teco_rgb2curses(teco_interface_ssm(SCI_STYLEGETFORE, STYLE_DEFAULT, 0));
+	gshort fg = teco_rgb2curses(teco_interface_ssm(SCI_STYLEGETBACK, STYLE_DEFAULT, 0));
+	gshort bg = teco_rgb2curses(teco_interface_ssm(SCI_STYLEGETFORE, STYLE_DEFAULT, 0));
 
 	wmove(teco_interface.info_window, 0, 0);
-	wattrset(teco_interface.info_window, teco_color_attr(fg, bg));
+	teco_wattr_set(teco_interface.info_window, 0, fg, bg);
 
 	const gchar *info_type_str;
 
@@ -1734,11 +1722,13 @@ teco_interface_popup_show(gsize prefix_len)
 		/* batch mode */
 		return;
 
-	short fg = teco_rgb2curses(teco_interface_ssm(SCI_STYLEGETFORE, STYLE_CALLTIP, 0));
-	short bg = teco_rgb2curses(teco_interface_ssm(SCI_STYLEGETBACK, STYLE_CALLTIP, 0));
+	gshort fg = teco_rgb2curses(teco_interface_ssm(SCI_STYLEGETFORE, STYLE_CALLTIP, 0));
+	gshort bg = teco_rgb2curses(teco_interface_ssm(SCI_STYLEGETBACK, STYLE_CALLTIP, 0));
 
 	teco_interface.popup_prefix_len = prefix_len;
-	teco_curses_info_popup_show(&teco_interface.popup, teco_color_attr(fg, bg));
+	attr_t attr = 0;
+	gshort pair = teco_color_pair(&attr, fg, bg);
+	teco_curses_info_popup_show(&teco_interface.popup, attr, pair);
 }
 
 void
@@ -1938,9 +1928,11 @@ teco_interface_process_mevent(MEVENT *event, GError **error)
 		else if (event->bstate & BUTTON_NUM(5))
 			teco_curses_info_popup_scroll(&teco_interface.popup, +2);
 
-		short fg = teco_rgb2curses(teco_interface_ssm(SCI_STYLEGETFORE, STYLE_CALLTIP, 0));
-		short bg = teco_rgb2curses(teco_interface_ssm(SCI_STYLEGETBACK, STYLE_CALLTIP, 0));
-		teco_curses_info_popup_show(&teco_interface.popup, teco_color_attr(fg, bg));
+		gshort fg = teco_rgb2curses(teco_interface_ssm(SCI_STYLEGETFORE, STYLE_CALLTIP, 0));
+		gshort bg = teco_rgb2curses(teco_interface_ssm(SCI_STYLEGETBACK, STYLE_CALLTIP, 0));
+		attr_t attr = 0;
+		gshort pair = teco_color_pair(&attr, fg, bg);
+		teco_curses_info_popup_show(&teco_interface.popup, attr, pair);
 
 		return TRUE;
 	}