core: move nick coloring from irc plugin to core (closes #262)

Options moved from irc.conf to weechat.conf:

* "irc.look.nick_color_force" moved to "weechat.look.nick_color_force"
* "irc.look.nick_color_hash" moved to "weechat.look.nick_color_hash"
* "irc.look.nick_color_stop_chars" moved to
  "weechat.look.nick_color_stop_chars"

New info (for API function "info_get"):

* "nick_color" (replaces "irc_nick_color")
* "nick_color_name" (replaced "irc_nick_color_name")

Info "irc_nick_color" and "irc_nick_color_name" are now deprecated.

And a bug has been fixed in nick coloring: stop chars are removed before
looking at a forced color.

12 files changed, 488 insertions, 342 deletions

diff --git a/src/core/wee-config.c b/src/core/wee-config.c
index 798bfea7a..e17743090 100644
--- a/src/core/wee-config.c
+++ b/src/core/wee-config.c
@@ -37,6 +37,7 @@
 
 #include "weechat.h"
 #include "wee-config.h"
+#include "wee-hashtable.h"
 #include "wee-hook.h"
 #include "wee-log.h"
 #include "wee-network.h"
@@ -148,6 +149,9 @@ struct t_config_option *config_look_key_bind_safe;
 struct t_config_option *config_look_key_grab_delay;
 struct t_config_option *config_look_mouse;
 struct t_config_option *config_look_mouse_timer_delay;
+struct t_config_option *config_look_nick_color_force;
+struct t_config_option *config_look_nick_color_hash;
+struct t_config_option *config_look_nick_color_stop_chars;
 struct t_config_option *config_look_nick_prefix;
 struct t_config_option *config_look_nick_suffix;
 struct t_config_option *config_look_paste_auto_add_newline;
@@ -307,6 +311,9 @@ struct t_config_look_word_char_item *config_word_chars_highlight = NULL;
 int config_word_chars_highlight_count = 0;
 struct t_config_look_word_char_item *config_word_chars_input = NULL;
 int config_word_chars_input_count = 0;
+char **config_nick_colors = NULL;
+int config_num_nick_colors = 0;
+struct t_hashtable *config_hashtable_nick_color_force = NULL;
 
 
 /*
@@ -660,6 +667,74 @@ config_compute_prefix_max_length_all_buffers ()
 }
 
 /*
+ * Sets nick colors using option "weechat.color.chat_nick_colors".
+ */
+
+void
+config_set_nick_colors ()
+{
+    if (config_nick_colors)
+    {
+        string_free_split (config_nick_colors);
+        config_nick_colors = NULL;
+        config_num_nick_colors = 0;
+    }
+
+    config_nick_colors = string_split (
+        CONFIG_STRING(config_color_chat_nick_colors),
+        ",", 0, 0,
+        &config_num_nick_colors);
+}
+
+/*
+ * Callback for changes on option "weechat.look.nick_color_force".
+ */
+
+void
+config_change_look_nick_color_force (const void *pointer, void *data,
+                                     struct t_config_option *option)
+{
+    char **items, *pos;
+    int num_items, i;
+
+    /* make C compiler happy */
+    (void) pointer;
+    (void) data;
+    (void) option;
+
+    if (!config_hashtable_nick_color_force)
+    {
+        config_hashtable_nick_color_force = hashtable_new (
+            32,
+            WEECHAT_HASHTABLE_STRING,
+            WEECHAT_HASHTABLE_STRING,
+            NULL, NULL);
+    }
+    else
+    {
+        hashtable_remove_all (config_hashtable_nick_color_force);
+    }
+
+    items = string_split (CONFIG_STRING(config_look_nick_color_force),
+                          ";", 0, 0, &num_items);
+    if (items)
+    {
+        for (i = 0; i < num_items; i++)
+        {
+            pos = strchr (items[i], ':');
+            if (pos)
+            {
+                pos[0] = '\0';
+                hashtable_set (config_hashtable_nick_color_force,
+                               items[i],
+                               pos + 1);
+            }
+        }
+        string_free_split (items);
+    }
+}
+
+/*
  * Callback for changes on options "weechat.look.nick_prefix" and
  * "weechat.look.nick_suffix".
  */
@@ -1047,6 +1122,7 @@ config_change_nick_colors (const void *pointer, void *data,
     (void) data;
     (void) option;
 
+    config_set_nick_colors ();
     gui_color_buffer_display ();
 }
 
@@ -1208,6 +1284,8 @@ config_weechat_init_after_read ()
 
     /* apply filters on all buffers */
     gui_filter_all_buffers ();
+
+    config_change_look_nick_color_force (NULL, NULL, NULL);
 }
 
 /*
@@ -2926,6 +3004,37 @@ config_weechat_init_options ()
            "wait this delay before processing event"),
         NULL, 1, 10000, "100", NULL, 0,
         NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL);
+    config_look_nick_color_force = config_file_new_option (
+        weechat_config_file, ptr_section,
+        "nick_color_force", "string",
+        N_("force color for some nicks: hash computed with nickname "
+           "to find color will not be used for these nicks (format is: "
+           "\"nick1:color1;nick2:color2\"); look up for nicks is with "
+           "exact case then lower case, so it's possible to use only lower "
+           "case for nicks in this option"),
+        NULL, 0, 0, "", NULL, 0,
+        NULL, NULL, NULL,
+        &config_change_look_nick_color_force, NULL, NULL,
+        NULL, NULL, NULL);
+    config_look_nick_color_hash = config_file_new_option (
+        weechat_config_file, ptr_section,
+        "nick_color_hash", "integer",
+        N_("hash algorithm used to find the color for a nick: djb2 = variant "
+           "of djb2 (position of letters matters: anagrams of a nick have "
+           "different color), sum = sum of letters"),
+        "djb2|sum", 0, 0, "sum", NULL, 0,
+        NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL);
+    config_look_nick_color_stop_chars = config_file_new_option (
+        weechat_config_file, ptr_section,
+        "nick_color_stop_chars", "string",
+        N_("chars used to stop in nick when computing color with letters of "
+           "nick (at least one char outside this list must be in string before "
+           "stopping) (example: nick \"|nick|away\" with \"|\" in chars will "
+           "return color of nick \"|nick\")"),
+        NULL, 0, 0, "_|[", NULL, 0,
+        NULL, NULL, NULL,
+        NULL, NULL, NULL,
+        NULL, NULL, NULL);
     config_look_nick_prefix = config_file_new_option (
         weechat_config_file, ptr_section,
         "nick_prefix", "string",
@@ -4387,4 +4496,17 @@ config_weechat_free ()
         config_word_chars_input = NULL;
         config_word_chars_input_count = 0;
     }
+
+    if (config_nick_colors)
+    {
+        string_free_split (config_nick_colors);
+        config_nick_colors = NULL;
+        config_num_nick_colors = 0;
+    }
+
+    if (config_hashtable_nick_color_force)
+    {
+        hashtable_free (config_hashtable_nick_color_force);
+        config_hashtable_nick_color_force = NULL;
+    }
 }
diff --git a/src/core/wee-config.h b/src/core/wee-config.h
index 9681b03cb..e4c4a3d33 100644
--- a/src/core/wee-config.h
+++ b/src/core/wee-config.h
@@ -53,6 +53,12 @@ enum t_config_look_buffer_search_where
     CONFIG_LOOK_BUFFER_SEARCH_PREFIX_MESSAGE,
 };
 
+enum t_config_look_nick_color_hash
+{
+    CONFIG_LOOK_NICK_COLOR_HASH_DJB2 = 0,
+    CONFIG_LOOK_NICK_COLOR_HASH_SUM,
+};
+
 enum t_config_look_prefix_align
 {
     CONFIG_LOOK_PREFIX_ALIGN_NONE = 0,
@@ -193,6 +199,9 @@ extern struct t_config_option *config_look_key_bind_safe;
 extern struct t_config_option *config_look_key_grab_delay;
 extern struct t_config_option *config_look_mouse;
 extern struct t_config_option *config_look_mouse_timer_delay;
+extern struct t_config_option *config_look_nick_color_force;
+extern struct t_config_option *config_look_nick_color_hash;
+extern struct t_config_option *config_look_nick_color_stop_chars;
 extern struct t_config_option *config_look_nick_prefix;
 extern struct t_config_option *config_look_nick_suffix;
 extern struct t_config_option *config_look_paste_auto_add_newline;
@@ -338,7 +347,11 @@ extern struct t_config_look_word_char_item *config_word_chars_highlight;
 extern int config_word_chars_highlight_count;
 extern struct t_config_look_word_char_item *config_word_chars_input;
 extern int config_word_chars_input_count;
+extern char **config_nick_colors;
+extern int config_num_nick_colors;
+extern struct t_hashtable *config_hashtable_nick_color_force;
 
+extern void config_set_nick_colors ();
 extern struct t_config_option *config_weechat_debug_get (const char *plugin_name);
 extern int config_weechat_debug_set (const char *plugin_name,
                                      const char *value);
diff --git a/src/gui/CMakeLists.txt b/src/gui/CMakeLists.txt
index 6a4d89156..26da7e7f0 100644
--- a/src/gui/CMakeLists.txt
+++ b/src/gui/CMakeLists.txt
@@ -36,11 +36,13 @@ gui-layout.c gui-layout.h
 gui-line.c gui-line.h
 gui-main.h
 gui-mouse.c gui-mouse.h
+gui-nick.c gui-nick.h
 gui-nicklist.c gui-nicklist.h
 gui-window.c gui-window.h)
 
 include_directories(${CMAKE_BINARY_DIR})
 add_library(weechat_gui_common STATIC ${LIB_GUI_COMMON_SRC})
+list(APPEND STATIC_LIBS weechat_gui_common)
 
 if(ENABLE_NCURSES)
   subdirs(curses)
diff --git a/src/gui/Makefile.am b/src/gui/Makefile.am
index 6ecaca6f8..528a7a66f 100644
--- a/src/gui/Makefile.am
+++ b/src/gui/Makefile.am
@@ -56,6 +56,8 @@ lib_weechat_gui_common_a_SOURCES = gui-bar.c \
                                    gui-main.h \
                                    gui-mouse.c \
                                    gui-mouse.h \
+                                   gui-nick.c \
+                                   gui-nick.h \
                                    gui-nicklist.c \
                                    gui-nicklist.h \
                                    gui-window.c \
diff --git a/src/gui/curses/CMakeLists.txt b/src/gui/curses/CMakeLists.txt
index 81af7bd34..8fadce2d2 100644
--- a/src/gui/curses/CMakeLists.txt
+++ b/src/gui/curses/CMakeLists.txt
@@ -81,7 +81,7 @@ add_executable(${EXECUTABLE} ${WEECHAT_CURSES_MAIN_SRC})
 
 add_dependencies(${EXECUTABLE} weechat_gui_curses)
 
-# Due to circular references, we must link two times with libweechat_core.a
+# Due to circular references, we must link two times with libweechat_core.a and libweechat_gui_common.a
 target_link_libraries(${EXECUTABLE} ${STATIC_LIBS} weechat_gui_curses ${EXTRA_LIBS} ${STATIC_LIBS})
 
 # Create a symbolic link weechat-curses -> weechat
diff --git a/src/gui/gui-nick.c b/src/gui/gui-nick.c
new file mode 100644
index 000000000..899ee444f
--- /dev/null
+++ b/src/gui/gui-nick.c
@@ -0,0 +1,259 @@
+/*
+ * gui-nick.c - nick functions (used by all GUI)
+ *
+ * Copyright (C) 2003-2016 Sébastien Helleu <flashcode@flashtux.org>
+ *
+ * This file is part of WeeChat, the extensible chat client.
+ *
+ * WeeChat is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * WeeChat is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with WeeChat.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+#include <stdlib.h>
+#include <string.h>
+
+#include "../core/weechat.h"
+#include "../core/wee-config.h"
+#include "../core/wee-hashtable.h"
+#include "../core/wee-string.h"
+#include "../core/wee-utf8.h"
+#include "gui-nick.h"
+#include "gui-color.h"
+
+
+/*
+ * Hashes a nickname to find color.
+ *
+ * Returns a number which is the index of color in the nicks colors of option
+ * "weechat.color.chat_nick_colors".
+ */
+
+int
+gui_nick_hash_color (const char *nickname)
+{
+    unsigned long color;
+    const char *ptr_nick;
+
+    if (!nickname || !nickname[0])
+        return 0;
+
+    if (!config_nick_colors)
+        config_set_nick_colors ();
+
+    if (config_num_nick_colors == 0)
+        return 0;
+
+    ptr_nick = nickname;
+    color = 0;
+
+    switch (CONFIG_INTEGER(config_look_nick_color_hash))
+    {
+        case CONFIG_LOOK_NICK_COLOR_HASH_DJB2:
+            /* variant of djb2 hash */
+            color = 5381;
+            while (ptr_nick && ptr_nick[0])
+            {
+                color ^= (color << 5) + (color >> 2) + utf8_char_int (ptr_nick);
+                ptr_nick = utf8_next_char (ptr_nick);
+            }
+            break;
+        case CONFIG_LOOK_NICK_COLOR_HASH_SUM:
+            /* sum of letters */
+            color = 0;
+            while (ptr_nick && ptr_nick[0])
+            {
+                color += utf8_char_int (ptr_nick);
+                ptr_nick = utf8_next_char (ptr_nick);
+            }
+            break;
+    }
+
+    return (color % config_num_nick_colors);
+}
+
+/*
+ * Gets forced color for a nick.
+ *
+ * Returns the name of color (for example: "green"), NULL if no color is forced
+ * for nick.
+ */
+
+const char *
+gui_nick_get_forced_color (const char *nickname)
+{
+    const char *forced_color;
+    char *nick_lower;
+
+    if (!nickname || !nickname[0])
+        return NULL;
+
+    forced_color = hashtable_get (config_hashtable_nick_color_force, nickname);
+    if (forced_color)
+        return forced_color;
+
+    nick_lower = strdup (nickname);
+    if (nick_lower)
+    {
+        string_tolower (nick_lower);
+        forced_color = hashtable_get (config_hashtable_nick_color_force,
+                                      nick_lower);
+        free (nick_lower);
+    }
+
+    return forced_color;
+}
+
+/*
+ * Duplicates a nick and stops at first char in list (using option
+ * weechat.look.nick_color_stop_chars).
+ *
+ * Note: result must be freed after use.
+ */
+
+char *
+gui_nick_strdup_for_color (const char *nickname)
+{
+    int char_size, other_char_seen;
+    char *result, *pos, utf_char[16];
+
+    if (!nickname)
+        return NULL;
+
+    result = malloc (strlen (nickname) + 1);
+    pos = result;
+    other_char_seen = 0;
+    while (nickname[0])
+    {
+        char_size = utf8_char_size (nickname);
+        memcpy (utf_char, nickname, char_size);
+        utf_char[char_size] = '\0';
+
+        if (strstr (CONFIG_STRING(config_look_nick_color_stop_chars),
+                    utf_char))
+        {
+            if (other_char_seen)
+            {
+                pos[0] = '\0';
+                return result;
+            }
+        }
+        else
+        {
+            other_char_seen = 1;
+        }
+        memcpy (pos, utf_char, char_size);
+        pos += char_size;
+
+        nickname += char_size;
+    }
+    pos[0] = '\0';
+    return result;
+}
+
+/*
+ * Finds a color code for a nick (according to nick letters).
+ *
+ * Returns a WeeChat color code (that can be used for display).
+ */
+
+const char *
+gui_nick_find_color (const char *nickname)
+{
+    int color;
+    char *nickname2;
+    const char *forced_color, *str_color;
+
+    if (!nickname || !nickname[0])
+        return gui_color_get_custom ("default");
+
+    if (!config_nick_colors)
+        config_set_nick_colors ();
+
+    if (config_num_nick_colors == 0)
+        return gui_color_get_custom ("default");
+
+    nickname2 = gui_nick_strdup_for_color (nickname);
+
+    /* look if color is forced */
+    forced_color = gui_nick_get_forced_color (
+        (nickname2) ? nickname2 : nickname);
+    if (forced_color)
+    {
+        forced_color = gui_color_get_custom (forced_color);
+        if (forced_color && forced_color[0])
+        {
+            if (nickname2)
+                free (nickname2);
+            return forced_color;
+        }
+    }
+
+    /* hash nickname to get color */
+    color = gui_nick_hash_color ((nickname2) ? nickname2 : nickname);
+
+    if (nickname2)
+        free (nickname2);
+
+    /* return color */
+    str_color = gui_color_get_custom (config_nick_colors[color]);
+    return (str_color[0]) ? str_color : gui_color_get_custom ("default");
+}
+
+/*
+ * Finds a color name for a nick (according to nick letters).
+ *
+ * Returns the name of a color (for example: "green").
+ */
+
+const char *
+gui_nick_find_color_name (const char *nickname)
+{
+    int color;
+    char *nickname2;
+    const char *forced_color;
+    static char *default_color = "default";
+
+    if (!nickname || !nickname[0])
+        return default_color;
+
+    if (!config_nick_colors)
+        config_set_nick_colors ();
+
+    if (config_num_nick_colors == 0)
+        return default_color;
+
+    nickname2 = gui_nick_strdup_for_color (nickname);
+
+    /* look if color is forced */
+    forced_color = gui_nick_get_forced_color (
+        (nickname2) ? nickname2 : nickname);
+    if (forced_color)
+    {
+        if (nickname2)
+            free (nickname2);
+        return forced_color;
+    }
+
+    /* hash nickname to get color */
+    color = gui_nick_hash_color ((nickname2) ? nickname2 : nickname);
+
+    if (nickname2)
+        free (nickname2);
+
+    /* return color name */
+    return config_nick_colors[color];
+}
diff --git a/src/gui/gui-nick.h b/src/gui/gui-nick.h
new file mode 100644
index 000000000..7c6bf896f
--- /dev/null
+++ b/src/gui/gui-nick.h
@@ -0,0 +1,26 @@
+/*
+ * Copyright (C) 2003-2016 Sébastien Helleu <flashcode@flashtux.org>
+ *
+ * This file is part of WeeChat, the extensible chat client.
+ *
+ * WeeChat is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * WeeChat is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with WeeChat.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef WEECHAT_GUI_NICK_H
+#define WEECHAT_GUI_NICK_H 1
+
+extern const char *gui_nick_find_color (const char *nickname);
+extern const char *gui_nick_find_color_name (const char *nickname);
+
+#endif /* WEECHAT_GUI_NICK_H */
diff --git a/src/plugins/irc/irc-config.c b/src/plugins/irc/irc-config.c
index 5365bfe9e..a488936b0 100644
--- a/src/plugins/irc/irc-config.c
+++ b/src/plugins/irc/irc-config.c
@@ -83,9 +83,6 @@ struct t_config_option *irc_config_look_join_auto_add_chantype;
 struct t_config_option *irc_config_look_msgbuffer_fallback;
 struct t_config_option *irc_config_look_new_channel_position;
 struct t_config_option *irc_config_look_new_pv_position;
-struct t_config_option *irc_config_look_nick_color_force;
-struct t_config_option *irc_config_look_nick_color_hash;
-struct t_config_option *irc_config_look_nick_color_stop_chars;
 struct t_config_option *irc_config_look_nick_completion_smart;
 struct t_config_option *irc_config_look_nick_mode;
 struct t_config_option *irc_config_look_nick_mode_empty;
@@ -150,11 +147,9 @@ struct t_config_option *irc_config_network_whois_double_nick;
 
 struct t_config_option *irc_config_server_default[IRC_SERVER_NUM_OPTIONS];
 
-struct t_hook *irc_config_hook_config_nick_colors = NULL;
-char **irc_config_nick_colors = NULL;
-int irc_config_num_nick_colors = 0;
+struct t_hook *irc_config_hook_config_nick_color_options = NULL;
+struct t_hook *irc_config_hook_config_chat_nick_colors = NULL;
 struct t_hashtable *irc_config_hashtable_display_join_message = NULL;
-struct t_hashtable *irc_config_hashtable_nick_color_force = NULL;
 struct t_hashtable *irc_config_hashtable_nick_prefixes = NULL;
 struct t_hashtable *irc_config_hashtable_color_mirc_remap = NULL;
 char **irc_config_nicks_hide_password = NULL;
@@ -234,28 +229,6 @@ irc_config_compute_nick_colors ()
 }
 
 /*
- * Sets nick colors using option "weechat.color.chat_nick_colors".
- */
-
-void
-irc_config_set_nick_colors ()
-{
-    if (irc_config_nick_colors)
-    {
-        weechat_string_free_split (irc_config_nick_colors);
-        irc_config_nick_colors = NULL;
-        irc_config_num_nick_colors = 0;
-    }
-
-    irc_config_nick_colors =
-        weechat_string_split (
-            weechat_config_string (
-                weechat_config_get ("weechat.color.chat_nick_colors")),
-            ",", 0, 0,
-            &irc_config_num_nick_colors);
-}
-
-/*
  * Checks if channel modes arguments must be displayed or hidden
  * (according to option irc.look.item_channel_modes_hide_args).
  *
@@ -295,7 +268,7 @@ irc_config_display_channel_modes_arguments (const char *modes)
 }
 
 /*
- * Callback for changes on option "weechat.color.chat_nick_colors".
+ * Callback for changes on options changing nick colors.
  */
 
 int
@@ -308,7 +281,6 @@ irc_config_change_nick_colors_cb (const void *pointer, void *data,
     (void) option;
     (void) value;
 
-    irc_config_set_nick_colors ();
     irc_config_compute_nick_colors ();
 
     return WEECHAT_RC_OK;
@@ -566,71 +538,6 @@ irc_config_change_look_highlight_tags_restrict (const void *pointer, void *data,
 }
 
 /*
- * Callback for changes on option "irc.look.nick_color_force".
- */
-
-void
-irc_config_change_look_nick_color_force (const void *pointer, void *data,
-                                         struct t_config_option *option)
-{
-    char **items, *pos;
-    int num_items, i;
-
-    /* make C compiler happy */
-    (void) pointer;
-    (void) data;
-    (void) option;
-
-    if (!irc_config_hashtable_nick_color_force)
-    {
-        irc_config_hashtable_nick_color_force = weechat_hashtable_new (
-            32,
-            WEECHAT_HASHTABLE_STRING,
-            WEECHAT_HASHTABLE_STRING,
-            NULL, NULL);
-    }
-    else
-        weechat_hashtable_remove_all (irc_config_hashtable_nick_color_force);
-
-    items = weechat_string_split (
-        weechat_config_string (irc_config_look_nick_color_force),
-        ";", 0, 0, &num_items);
-    if (items)
-    {
-        for (i = 0; i < num_items; i++)
-        {
-            pos = strchr (items[i], ':');
-            if (pos)
-            {
-                pos[0] = '\0';
-                weechat_hashtable_set (irc_config_hashtable_nick_color_force,
-                                       items[i],
-                                       pos + 1);
-            }
-        }
-        weechat_string_free_split (items);
-    }
-
-    irc_config_compute_nick_colors ();
-}
-
-/*
- * Callback for changes on options that change nick colors.
- */
-
-void
-irc_config_change_look_nick_colors (const void *pointer, void *data,
-                                    struct t_config_option *option)
-{
-    /* make C compiler happy */
-    (void) pointer;
-    (void) data;
-    (void) option;
-
-    irc_config_compute_nick_colors ();
-}
-
-/*
  * Callback for changes on option "irc.look.item_display_server".
  */
 
@@ -2530,11 +2437,6 @@ irc_config_init ()
         WEECHAT_HASHTABLE_STRING,
         WEECHAT_HASHTABLE_STRING,
         NULL, NULL);
-    irc_config_hashtable_nick_color_force = weechat_hashtable_new (
-        32,
-        WEECHAT_HASHTABLE_STRING,
-        WEECHAT_HASHTABLE_STRING,
-        NULL, NULL);
     irc_config_hashtable_nick_prefixes = weechat_hashtable_new (
         32,
         WEECHAT_HASHTABLE_STRING,
@@ -2821,39 +2723,6 @@ irc_config_init ()
            "of server)"),
         "none|next|near_server", 0, 0, "none", NULL, 0,
         NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL);
-    irc_config_look_nick_color_force = weechat_config_new_option (
-        irc_config_file, ptr_section,
-        "nick_color_force", "string",
-        N_("force color for some nicks: hash computed with nickname "
-           "to find color will not be used for these nicks (format is: "
-           "\"nick1:color1;nick2:color2\"); look up for nicks is with "
-           "exact case then lower case, so it's possible to use only lower "
-           "case for nicks in this option"),
-        NULL, 0, 0, "", NULL, 0,
-        NULL, NULL, NULL,
-        &irc_config_change_look_nick_color_force, NULL, NULL,
-        NULL, NULL, NULL);
-    irc_config_look_nick_color_hash = weechat_config_new_option (
-        irc_config_file, ptr_section,
-        "nick_color_hash", "integer",
-        N_("hash algorithm used to find the color for a nick: djb2 = variant "
-           "of djb2 (position of letters matters: anagrams of a nick have "
-           "different color), sum = sum of letters"),
-        "djb2|sum", 0, 0, "sum", NULL, 0,
-        NULL, NULL, NULL,
-        &irc_config_change_look_nick_colors, NULL, NULL,
-        NULL, NULL, NULL);
-    irc_config_look_nick_color_stop_chars = weechat_config_new_option (
-        irc_config_file, ptr_section,
-        "nick_color_stop_chars", "string",
-        N_("chars used to stop in nick when computing color with letters of "
-           "nick (at least one char outside this list must be in string before "
-           "stopping) (example: nick \"|nick|away\" with \"|\" in chars will "
-           "return color of nick \"|nick\")"),
-        NULL, 0, 0, "_|[", NULL, 0,
-        NULL, NULL, NULL,
-        &irc_config_change_look_nick_colors, NULL, NULL,
-        NULL, NULL, NULL);
     irc_config_look_nick_completion_smart = weechat_config_new_option (
         irc_config_file, ptr_section,
         "nick_completion_smart", "integer",
@@ -3396,7 +3265,10 @@ irc_config_init ()
     }
     irc_config_section_server = ptr_section;
 
-    irc_config_hook_config_nick_colors = weechat_hook_config (
+    irc_config_hook_config_nick_color_options = weechat_hook_config (
+        "weechat.look.nick_color_*",
+        &irc_config_change_nick_colors_cb, NULL, NULL);
+    irc_config_hook_config_chat_nick_colors = weechat_hook_config (
         "weechat.color.chat_nick_colors",
         &irc_config_change_nick_colors_cb, NULL, NULL);
 
@@ -3420,7 +3292,6 @@ irc_config_read ()
     {
         irc_notify_new_for_all_servers ();
         irc_config_change_look_display_join_message (NULL, NULL, NULL);
-        irc_config_change_look_nick_color_force (NULL, NULL, NULL);
         irc_config_change_look_nicks_hide_password (NULL, NULL, NULL);
         irc_config_change_color_nick_prefixes (NULL, NULL, NULL);
         irc_config_change_color_mirc_remap (NULL, NULL, NULL);
@@ -3452,16 +3323,16 @@ irc_config_free ()
 {
     weechat_config_free (irc_config_file);
 
-    if (irc_config_hook_config_nick_colors)
+    if (irc_config_hook_config_nick_color_options)
     {
-        weechat_unhook (irc_config_hook_config_nick_colors);
-        irc_config_hook_config_nick_colors = NULL;
+        weechat_unhook (irc_config_hook_config_nick_color_options);
+        irc_config_hook_config_nick_color_options = NULL;
     }
-    if (irc_config_nick_colors)
+
+    if (irc_config_hook_config_chat_nick_colors)
     {
-        weechat_string_free_split (irc_config_nick_colors);
-        irc_config_nick_colors = NULL;
-        irc_config_num_nick_colors = 0;
+        weechat_unhook (irc_config_hook_config_chat_nick_colors);
+        irc_config_hook_config_chat_nick_colors = NULL;
     }
 
     if (irc_config_nicks_hide_password)
@@ -3477,12 +3348,6 @@ irc_config_free ()
         irc_config_hashtable_display_join_message = NULL;
     }
 
-    if (irc_config_hashtable_nick_color_force)
-    {
-        weechat_hashtable_free (irc_config_hashtable_nick_color_force);
-        irc_config_hashtable_nick_color_force = NULL;
-    }
-
     if (irc_config_hashtable_nick_prefixes)
     {
         weechat_hashtable_free (irc_config_hashtable_nick_prefixes);
diff --git a/src/plugins/irc/irc-config.h b/src/plugins/irc/irc-config.h
index dc75af49e..ca1f5b531 100644
--- a/src/plugins/irc/irc-config.h
+++ b/src/plugins/irc/irc-config.h
@@ -62,12 +62,6 @@ enum t_irc_config_look_notice_as_pv
     IRC_CONFIG_LOOK_NOTICE_AS_PV_ALWAYS,
 };
 
-enum t_irc_config_look_nick_color_hash
-{
-    IRC_CONFIG_LOOK_NICK_COLOR_HASH_DJB2 = 0,
-    IRC_CONFIG_LOOK_NICK_COLOR_HASH_SUM,
-};
-
 enum t_irc_config_look_nick_mode
 {
     IRC_CONFIG_LOOK_NICK_MODE_NONE = 0,
@@ -128,9 +122,6 @@ extern struct t_config_option *irc_config_look_join_auto_add_chantype;
 extern struct t_config_option *irc_config_look_msgbuffer_fallback;
 extern struct t_config_option *irc_config_look_new_channel_position;
 extern struct t_config_option *irc_config_look_new_pv_position;
-extern struct t_config_option *irc_config_look_nick_color_force;
-extern struct t_config_option *irc_config_look_nick_color_hash;
-extern struct t_config_option *irc_config_look_nick_color_stop_chars;
 extern struct t_config_option *irc_config_look_nick_completion_smart;
 extern struct t_config_option *irc_config_look_nick_mode;
 extern struct t_config_option *irc_config_look_nick_mode_empty;
@@ -189,17 +180,12 @@ extern struct t_config_option *irc_config_network_whois_double_nick;
 
 extern struct t_config_option *irc_config_server_default[];
 
-extern char **irc_config_nick_colors;
-extern int irc_config_num_nick_colors;
-
 extern struct t_hashtable *irc_config_hashtable_display_join_message;
-extern struct t_hashtable *irc_config_hashtable_nick_color_force;
 extern struct t_hashtable *irc_config_hashtable_nick_prefixes;
 extern struct t_hashtable *irc_config_hashtable_color_mirc_remap;
 extern char **irc_config_nicks_hide_password;
 extern int irc_config_num_nicks_hide_password;
 
-extern void irc_config_set_nick_colors ();
 extern int irc_config_display_channel_modes_arguments (const char *modes);
 extern int irc_config_server_check_value_cb (const void *pointer, void *data,
                                              struct t_config_option *option,
diff --git a/src/plugins/irc/irc-info.c b/src/plugins/irc/irc-info.c
index 7133b21a1..d4f75439d 100644
--- a/src/plugins/irc/irc-info.c
+++ b/src/plugins/irc/irc-info.c
@@ -847,12 +847,14 @@ irc_info_init ()
         &irc_info_info_irc_nick_from_host_cb, NULL, NULL);
     weechat_hook_info (
         "irc_nick_color",
-        N_("get nick color code"),
+        N_("get nick color code "
+           "(*deprecated* since version 1.5, replaced by \"nick_color\")"),
         N_("nickname"),
         &irc_info_info_irc_nick_color_cb, NULL, NULL);
     weechat_hook_info (
         "irc_nick_color_name",
-        N_("get nick color name"),
+        N_("get nick color name "
+           "(*deprecated* since version 1.5, replaced by \"nick_color_name\")"),
         N_("nickname"),
         &irc_info_info_irc_nick_color_name_cb, NULL, NULL);
     weechat_hook_info (
diff --git a/src/plugins/irc/irc-nick.c b/src/plugins/irc/irc-nick.c
index 308181c76..6f01f48d8 100644
--- a/src/plugins/irc/irc-nick.c
+++ b/src/plugins/irc/irc-nick.c
@@ -93,130 +93,6 @@ irc_nick_is_nick (const char *string)
 }
 
 /*
- * Duplicates a nick and stops at first char in list (using option
- * irc.look.nick_color_stop_chars).
- *
- * Note: result must be freed after use.
- */
-
-char *
-irc_nick_strdup_for_color (const char *nickname)
-{
-    int char_size, other_char_seen;
-    char *result, *pos, utf_char[16];
-
-    result = malloc (strlen (nickname) + 1);
-    pos = result;
-    other_char_seen = 0;
-    while (nickname[0])
-    {
-        char_size = weechat_utf8_char_size (nickname);
-        memcpy (utf_char, nickname, char_size);
-        utf_char[char_size] = '\0';
-
-        if (strstr (weechat_config_string (irc_config_look_nick_color_stop_chars),
-                    utf_char))
-        {
-            if (other_char_seen)
-            {
-                pos[0] = '\0';
-                return result;
-            }
-        }
-        else
-        {
-            other_char_seen = 1;
-        }
-        memcpy (pos, utf_char, char_size);
-        pos += char_size;
-
-        nickname += char_size;
-    }
-    pos[0] = '\0';
-    return result;
-}
-
-/*
- * Hashes a nickname to find color.
- *
- * Returns a number which is the index of color in the nicks colors of option
- * "weechat.color.chat_nick_colors".
- */
-
-int
-irc_nick_hash_color (const char *nickname)
-{
-    unsigned long color;
-    const char *ptr_nick;
-
-    if (!irc_config_nick_colors)
-        irc_config_set_nick_colors ();
-
-    if (irc_config_num_nick_colors == 0)
-        return 0;
-
-    ptr_nick = nickname;
-    color = 0;
-
-    switch (weechat_config_integer (irc_config_look_nick_color_hash))
-    {
-        case IRC_CONFIG_LOOK_NICK_COLOR_HASH_DJB2:
-            /* variant of djb2 hash */
-            color = 5381;
-            while (ptr_nick && ptr_nick[0])
-            {
-                color ^= (color << 5) + (color >> 2) + weechat_utf8_char_int (ptr_nick);
-                ptr_nick = weechat_utf8_next_char (ptr_nick);
-            }
-            break;
-        case IRC_CONFIG_LOOK_NICK_COLOR_HASH_SUM:
-            /* sum of letters */
-            color = 0;
-            while (ptr_nick && ptr_nick[0])
-            {
-                color += weechat_utf8_char_int (ptr_nick);
-                ptr_nick = weechat_utf8_next_char (ptr_nick);
-            }
-            break;
-    }
-
-    return (color % irc_config_num_nick_colors);
-}
-
-/*
- * Gets forced color for a nick.
- *
- * Returns the name of color (for example: "green"), NULL if no color is forced
- * for nick.
- */
-
-const char *
-irc_nick_get_forced_color (const char *nickname)
-{
-    const char *forced_color;
-    char *nick_lower;
-
-    if (!nickname)
-        return NULL;
-
-    forced_color = weechat_hashtable_get (irc_config_hashtable_nick_color_force,
-                                          nickname);
-    if (forced_color)
-        return forced_color;
-
-    nick_lower = strdup (nickname);
-    if (nick_lower)
-    {
-        weechat_string_tolower (nick_lower);
-        forced_color = weechat_hashtable_get (irc_config_hashtable_nick_color_force,
-                                              nick_lower);
-        free (nick_lower);
-    }
-
-    return forced_color;
-}
-
-/*
  * Finds a color code for a nick (according to nick letters).
  *
  * Returns a WeeChat color code (that can be used for display).
@@ -225,34 +101,7 @@ irc_nick_get_forced_color (const char *nickname)
 const char *
 irc_nick_find_color (const char *nickname)
 {
-    int color;
-    char *nickname2;
-    const char *forced_color, *str_color;
-
-    if (!irc_config_nick_colors)
-        irc_config_set_nick_colors ();
-
-    if (irc_config_num_nick_colors == 0)
-        return weechat_color ("default");
-
-    /* look if color is forced */
-    forced_color = irc_nick_get_forced_color (nickname);
-    if (forced_color)
-    {
-        forced_color = weechat_color (forced_color);
-        if (forced_color && forced_color[0])
-            return forced_color;
-    }
-
-    /* hash nickname to get color */
-    nickname2 = irc_nick_strdup_for_color (nickname);
-    color = irc_nick_hash_color ((nickname2) ? nickname2 : nickname);
-    if (nickname2)
-        free (nickname2);
-
-    /* return color */
-    str_color = weechat_color (irc_config_nick_colors[color]);
-    return (str_color[0]) ? str_color : weechat_color("default");
+    return weechat_info_get ("nick_color", nickname);
 }
 
 /*
@@ -264,30 +113,7 @@ irc_nick_find_color (const char *nickname)
 const char *
 irc_nick_find_color_name (const char *nickname)
 {
-    int color;
-    char *nickname2;
-    const char *forced_color;
-    static char *default_color = "default";
-
-    if (!irc_config_nick_colors)
-        irc_config_set_nick_colors ();
-
-    if (irc_config_num_nick_colors == 0)
-        return default_color;
-
-    /* look if color is forced */
-    forced_color = irc_nick_get_forced_color (nickname);
-    if (forced_color)
-        return forced_color;
-
-    /* hash nickname to get color */
-    nickname2 = irc_nick_strdup_for_color (nickname);
-    color = irc_nick_hash_color ((nickname2) ? nickname2 : nickname);
-    if (nickname2)
-        free (nickname2);
-
-    /* return color name */
-    return irc_config_nick_colors[color];
+    return weechat_info_get ("nick_color_name", nickname);
 }
 
 /*
diff --git a/src/plugins/plugin-api.c b/src/plugins/plugin-api.c
index 4be88b077..cc4e4b0a9 100644
--- a/src/plugins/plugin-api.c
+++ b/src/plugins/plugin-api.c
@@ -59,6 +59,7 @@
 #include "../gui/gui-key.h"
 #include "../gui/gui-layout.h"
 #include "../gui/gui-line.h"
+#include "../gui/gui-nick.h"
 #include "../gui/gui-nicklist.h"
 #include "../gui/gui-window.h"
 #include "plugin.h"
@@ -786,6 +787,40 @@ plugin_api_info_color_rgb2term_cb (const void *pointer, void *data,
 }
 
 /*
+ * Returns nick color code for a nickname.
+ */
+
+const char *
+plugin_api_info_nick_color_cb (const void *pointer, void *data,
+                               const char *info_name,
+                               const char *arguments)
+{
+    /* make C compiler happy */
+    (void) pointer;
+    (void) data;
+    (void) info_name;
+
+    return gui_nick_find_color (arguments);
+}
+
+/*
+ * Returns nick color name for a nickname.
+ */
+
+const char *
+plugin_api_info_nick_color_name_cb (const void *pointer, void *data,
+                                    const char *info_name,
+                                    const char *arguments)
+{
+    /* make C compiler happy */
+    (void) pointer;
+    (void) data;
+    (void) info_name;
+
+    return gui_nick_find_color_name (arguments);
+}
+
+/*
  * Returns WeeChat infolist "bar".
  *
  * Note: result must be freed after use with function weechat_infolist_free().
@@ -1855,6 +1890,14 @@ plugin_api_init ()
                N_("RGB color converted to terminal color (0-255)"),
                N_("rgb,limit (limit is optional and is set to 256 by default)"),
                &plugin_api_info_color_rgb2term_cb, NULL, NULL);
+    hook_info (NULL, "nick_color",
+               N_("get nick color code"),
+               N_("nickname"),
+               &plugin_api_info_nick_color_cb, NULL, NULL);
+    hook_info (NULL, "nick_color_name",
+               N_("get nick color name"),
+               N_("nickname"),
+               &plugin_api_info_nick_color_name_cb, NULL, NULL);
 
     /* WeeChat core infolist hooks */
     hook_infolist (NULL, "bar",