remove x11 dependency for color parsing

this means we can use the same, portable color-parsing code
everywhere, including ncurses

src/colours.cc

@@ -91,7 +91,6 @@ unsigned int adjust_colours(unsigned int colour) {
 }
 
 #ifdef BUILD_GUI
-#ifdef BUILD_WAYLAND
 static int hex_nibble_value(char c) {
   if (c >= '0' && c <= '9') {
     return c - '0';
@@ -139,7 +138,7 @@ Colour Colour::from_ncurses(int nccolor) {
 }
 #endif /*BUILD_NCURSES*/
 
-Colour manually_get_x11_color(const char *name) {
+Colour parse_color(const char *name) {
   unsigned short r, g, b;
   size_t len = strlen(name);
   if (OsLookupColor(-1, name, len, &r, &g, &b)) {
@@ -172,52 +171,8 @@ err:
   NORM_ERR("can't parse X color '%s' (%d)", name, len);
   return error_colour;
 }
-#endif /* BUILD_WAYLAND */
 
-Colour get_x11_color(const char *name) {
+Colour parse_color(const std::string &colour) {
-#ifdef BUILD_X11
+  return parse_color(colour.c_str());
-#ifdef BUILD_WAYLAND
-  if (!display) { return manually_get_x11_color(name); }
-#endif /*BUILD_WAYLAND*/
-
-  if (out_to_x.get(*state)) {
-  assert(display != nullptr);
-  XColor color;
-
-  color.pixel = 0;
-  if (XParseColor(display, DefaultColormap(display, screen), name, &color) ==
-      0) {
-    /* lets check if it's a hex colour with the # missing in front
-     * if yes, then do something about it */
-    char newname[DEFAULT_TEXT_BUFFER_SIZE];
-
-    newname[0] = '#';
-    strncpy(&newname[1], name, DEFAULT_TEXT_BUFFER_SIZE - 1);
-    /* now lets try again */
-    if (XParseColor(display, DefaultColormap(display, screen), &newname[0],
-                    &color) == 0) {
-      NORM_ERR("can't parse X color '%s'", name);
-      return error_colour;
-    }
-  }
-  if (XAllocColor(display, DefaultColormap(display, screen), &color) == 0) {
-    NORM_ERR("can't allocate X color '%s'", name);
-  }
-
-  Colour out;
-  out.red = color.red;
-  out.green = color.green;
-  out.blue = color.blue;
-  out.alpha = 0xff;
-  return out;
-  }
-#endif /*BUILD_X11*/
-#ifdef BUILD_WAYLAND
-  return manually_get_x11_color(name);
-#endif /*BUILD_WAYLAND*/
-}
-
-Colour get_x11_color(const std::string &colour) {
-  return get_x11_color(colour.c_str());
 }
 #endif /*BUILD_GUI*/

src/colours.h

@@ -114,8 +114,8 @@ public:
 };
 
 
-Colour get_x11_color(const std::string &colour);
+Colour parse_color(const std::string &colour);
 // XXX: when everyone uses C++ strings, remove this C version
-Colour get_x11_color(const char *);
+Colour parse_color(const char *);
 
 #endif /* _COLOURS_H */

src/core.cc

@@ -403,7 +403,7 @@ struct text_object *construct_text_object(char *s, const char *arg, long line,
 
 #ifdef BUILD_GUI
   if (s[0] == '#') {
-    obj->data.l = get_x11_color(s).to_argb32();
+    obj->data.l = parse_color(s).to_argb32();
     obj->callbacks.print = &new_fg;
   } else
 #endif /* BUILD_GUI */
@@ -750,33 +750,15 @@ struct text_object *construct_text_object(char *s, const char *arg, long line,
 #endif /* BUILD_GUI */
   END OBJ(color, nullptr)
 #ifdef BUILD_GUI
-      if (out_to_gui(*state)) {
+  if (out_to_gui(*state)) {
-    Colour c = arg != nullptr ? get_x11_color(arg) : default_color.get(*state);
+    Colour c = arg != nullptr ? parse_color(arg) : default_color.get(*state);
     obj->data.l = c.to_argb32();
     set_current_text_color(c);
   }
 #endif /* BUILD_GUI */
 #ifdef BUILD_NCURSES
   if (out_to_ncurses.get(*state)) {
-    obj->data.l = COLOR_WHITE;
+    Colour c = arg != nullptr ? parse_color(arg) : default_color.get(*state);
-    if (arg != nullptr) {
-      if (strcasecmp(arg, "red") == 0) {
-        obj->data.l = COLOR_RED;
-      } else if (strcasecmp(arg, "green") == 0) {
-        obj->data.l = COLOR_GREEN;
-      } else if (strcasecmp(arg, "yellow") == 0) {
-        obj->data.l = COLOR_YELLOW;
-      } else if (strcasecmp(arg, "blue") == 0) {
-        obj->data.l = COLOR_BLUE;
-      } else if (strcasecmp(arg, "magenta") == 0) {
-        obj->data.l = COLOR_MAGENTA;
-      } else if (strcasecmp(arg, "cyan") == 0) {
-        obj->data.l = COLOR_CYAN;
-      } else if (strcasecmp(arg, "black") == 0) {
-        obj->data.l = COLOR_BLACK;
-      }
-    }
-    Colour c = Color::from_ncurses(obj->data.l);
     obj->data.l = c.to_argb32();
     set_current_text_color(c);
     init_pair(c.to_ncurses(), c.to_ncurses(), COLOR_BLACK);
@@ -1457,14 +1439,14 @@ struct text_object *construct_text_object(char *s, const char *arg, long line,
   END OBJ(shadecolor, nullptr)
 #ifdef BUILD_GUI
       obj->data.l =
-      (arg != nullptr ? get_x11_color(arg) : default_shade_color.get(*state))
+      (arg != nullptr ? parse_color(arg) : default_shade_color.get(*state))
         .to_argb32();
   obj->callbacks.print = &new_bg;
 #endif /* BUILD_GUI */
   END OBJ(outlinecolor, nullptr)
 #ifdef BUILD_GUI
       obj->data.l =
-      (arg != nullptr ? get_x11_color(arg) : default_outline_color.get(*state))
+      (arg != nullptr ? parse_color(arg) : default_outline_color.get(*state))
         .to_argb32();
   obj->callbacks.print = &new_outline;
 #endif /* BUILD_GUI */

src/gui.h

@@ -107,7 +107,7 @@ struct colour_traits {
 
   static inline std::pair<Type, bool> convert(lua::state &l, int index,
                                               const std::string &) {
-    return {get_x11_color(l.tostring(index)), true};
+    return {parse_color(l.tostring(index)), true};
   }
 };