path: root/libempathy-gtk/empathy-theme-manager.c

/* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8 -*- */
/*
 * Copyright (C) 2005-2007 Imendio AB
 * Copyright (C) 2008 Collabora Ltd.
 *
 * This program 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 2 of the
 * License, or (at your option) any later version.
 *
 * This program 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 this program; if not, write to the
 * Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
 * Boston, MA  02110-1301  USA
 *
 * Authors: Xavier Claessens <xclaesse@gmail.com>
 */

#include "config.h"

#include <string.h>

#include <glib/gi18n-lib.h>
#include <gtk/gtk.h>

#include <telepathy-glib/util.h>
#include <libempathy/empathy-utils.h>

#include "empathy-theme-manager.h"
#include "empathy-chat-view.h"
#include "empathy-conf.h"
#include "empathy-chat-text-view.h"
#include "empathy-theme-boxes.h"
#include "empathy-theme-irc.h"

#define DEBUG_FLAG EMPATHY_DEBUG_OTHER
#include <libempathy/empathy-debug.h>

#define GET_PRIV(obj) EMPATHY_GET_PRIV (obj, EmpathyThemeManager)
typedef struct {
    gchar       *name;
    guint        name_notify_id;
    GtkSettings *settings;
    GList       *boxes_views;
} EmpathyThemeManagerPriv;

enum {
    THEME_CHANGED,
    LAST_SIGNAL
};

static guint signals[LAST_SIGNAL] = { 0 };

static const gchar *themes[] = {
    "classic", N_("Classic"),
    "simple", N_("Simple"),
    "clean", N_("Clean"),
    "blue", N_("Blue"),
    NULL
};

G_DEFINE_TYPE (EmpathyThemeManager, empathy_theme_manager, G_TYPE_OBJECT);

static void
theme_manager_gdk_color_to_hex (GdkColor *gdk_color, gchar *str_color)
{
    g_snprintf (str_color, 10,
            "#%02x%02x%02x",
            gdk_color->red >> 8,
            gdk_color->green >> 8,
            gdk_color->blue >> 8);
}

static EmpathyThemeIrc *
theme_manager_create_irc_view (EmpathyThemeManager *manager)
{
    EmpathyChatTextView *view;
    EmpathyThemeIrc     *theme;

    theme = empathy_theme_irc_new ();
    view = EMPATHY_CHAT_TEXT_VIEW (theme);

    /* Define base tags */
    empathy_chat_text_view_tag_set (view, EMPATHY_CHAT_TEXT_VIEW_TAG_SPACING,
                    "size", 2000,
                    NULL);
    empathy_chat_text_view_tag_set (view, EMPATHY_CHAT_TEXT_VIEW_TAG_TIME,
                    "foreground", "darkgrey",
                    "justification", GTK_JUSTIFY_CENTER,
                    NULL);
    empathy_chat_text_view_tag_set (view, EMPATHY_CHAT_TEXT_VIEW_TAG_ACTION,
                    "foreground", "brown4",
                    "style", PANGO_STYLE_ITALIC,
                    NULL);
    empathy_chat_text_view_tag_set (view, EMPATHY_CHAT_TEXT_VIEW_TAG_BODY,
                    "foreground-set", FALSE,
                    NULL);
    empathy_chat_text_view_tag_set (view, EMPATHY_CHAT_TEXT_VIEW_TAG_EVENT,
                    "foreground", "PeachPuff4",
                    "justification", GTK_JUSTIFY_LEFT,
                    NULL);
    empathy_chat_text_view_tag_set (view, EMPATHY_CHAT_TEXT_VIEW_TAG_LINK,
                    "foreground", "steelblue",
                    "underline", PANGO_UNDERLINE_SINGLE,
                    NULL);

    /* Define IRC tags */
    empathy_chat_text_view_tag_set (view, EMPATHY_THEME_IRC_TAG_NICK_SELF,
                    "foreground", "sea green",
                    NULL);
    empathy_chat_text_view_tag_set (view, EMPATHY_THEME_IRC_TAG_NICK_OTHER,
                    "foreground", "skyblue4",
                    NULL);
    empathy_chat_text_view_tag_set (view, EMPATHY_THEME_IRC_TAG_NICK_HIGHLIGHT,
                    "foreground", "indian red",
                    "weight", PANGO_WEIGHT_BOLD,
                    NULL);

    return theme;
}

static void
theme_manager_boxes_weak_notify_cb (gpointer data,
                    GObject *where_the_object_was)
{
    EmpathyThemeManagerPriv *priv = GET_PRIV (data);

    priv->boxes_views = g_list_remove (priv->boxes_views, where_the_object_was);
}

static EmpathyThemeBoxes *
theme_manager_create_boxes_view (EmpathyThemeManager *manager)
{
    EmpathyThemeManagerPriv *priv = GET_PRIV (manager);
    EmpathyThemeBoxes       *theme;

    theme = empathy_theme_boxes_new ();
    priv->boxes_views = g_list_prepend (priv->boxes_views, theme);
    g_object_weak_ref (G_OBJECT (theme),
               theme_manager_boxes_weak_notify_cb,
               manager);

    return theme;
}

static void
theme_manager_update_boxes_tags (EmpathyThemeBoxes *theme,
                 const gchar       *header_foreground,
                 const gchar       *header_background,
                 const gchar       *header_line_background,
                 const gchar       *action_foreground,
                 const gchar       *time_foreground,
                 const gchar       *event_foreground,
                 const gchar       *link_foreground,
                 const gchar       *text_foreground,
                 const gchar       *text_background,
                 const gchar       *highlight_foreground)

{
    EmpathyChatTextView *view = EMPATHY_CHAT_TEXT_VIEW (theme);
    GtkTextTag          *tag;

    DEBUG ("Update view with new colors:\n"
        "header_foreground = %s\n"
        "header_background = %s\n"
        "header_line_background = %s\n"
        "action_foreground = %s\n"
        "time_foreground = %s\n"
        "event_foreground = %s\n"
        "link_foreground = %s\n"
        "text_foreground = %s\n"
        "text_background = %s\n"
        "highlight_foreground = %s\n",
        header_foreground, header_background, header_line_background,
        action_foreground, time_foreground, event_foreground,
        link_foreground, text_foreground, text_background,
        highlight_foreground);


    /* FIXME: GtkTextTag don't support to set color properties to NULL.
     * See bug #542523 */
    
    #define TAG_SET(prop, prop_set, value) \
        if (value != NULL) { \
            g_object_set (tag, prop, value, NULL); \
        } else { \
            g_object_set (tag, prop_set, FALSE, NULL); \
        }

    /* Define base tags */
    tag = empathy_chat_text_view_tag_set (view, EMPATHY_CHAT_TEXT_VIEW_TAG_HIGHLIGHT,
                          "weight", PANGO_WEIGHT_BOLD,
                          "pixels-above-lines", 4,
                          NULL);
    TAG_SET ("paragraph-background", "paragraph-background-set", text_background);
    TAG_SET ("foreground", "foreground-set",highlight_foreground);

    empathy_chat_text_view_tag_set (view, EMPATHY_CHAT_TEXT_VIEW_TAG_SPACING,
                    "size", 3000,
                    "pixels-above-lines", 8,
                    NULL);
    tag = empathy_chat_text_view_tag_set (view, EMPATHY_CHAT_TEXT_VIEW_TAG_TIME,
                          "justification", GTK_JUSTIFY_CENTER,
                          NULL);
    TAG_SET ("foreground", "foreground-set", time_foreground);
    tag = empathy_chat_text_view_tag_set (view, EMPATHY_CHAT_TEXT_VIEW_TAG_ACTION,
                          "style", PANGO_STYLE_ITALIC,
                          "pixels-above-lines", 4,
                          NULL);
    TAG_SET ("paragraph-background", "paragraph-background-set", text_background);
    TAG_SET ("foreground", "foreground-set", action_foreground);
    tag = empathy_chat_text_view_tag_set (view, EMPATHY_CHAT_TEXT_VIEW_TAG_BODY,
                          "pixels-above-lines", 4,
                          NULL);
    TAG_SET ("paragraph-background", "paragraph-background-set", text_background);
    TAG_SET ("foreground", "foreground-set", text_foreground);
    tag = empathy_chat_text_view_tag_set (view, EMPATHY_CHAT_TEXT_VIEW_TAG_EVENT,
                          "justification", GTK_JUSTIFY_LEFT,
                          NULL);
    TAG_SET ("foreground", "foreground-set", event_foreground);
    tag = empathy_chat_text_view_tag_set (view, EMPATHY_CHAT_TEXT_VIEW_TAG_LINK,
                          "underline", PANGO_UNDERLINE_SINGLE,
                          NULL);
    TAG_SET ("foreground", "foreground-set", link_foreground);

    /* Define BOXES tags */
    tag = empathy_chat_text_view_tag_set (view, EMPATHY_THEME_BOXES_TAG_HEADER,
                          "weight", PANGO_WEIGHT_BOLD,
                          NULL);
    TAG_SET ("foreground", "foreground-set", header_foreground);
    TAG_SET ("paragraph-background", "paragraph-background-set", header_background);
    tag = empathy_chat_text_view_tag_set (view, EMPATHY_THEME_BOXES_TAG_HEADER_LINE,
                          "size", 1,
                          NULL);
    TAG_SET ("paragraph-background", "paragraph-background-set", header_line_background);

    #undef TAG_SET
}

static void
theme_manager_update_simple_tags (EmpathyThemeBoxes *theme)
{
    GtkStyle *style;
    gchar     color1[10];
    gchar     color2[10];
    gchar     color3[10];
    gchar     color4[10];

    style = gtk_widget_get_default_style ();

    theme_manager_gdk_color_to_hex (&style->base[GTK_STATE_SELECTED], color1);
    theme_manager_gdk_color_to_hex (&style->bg[GTK_STATE_SELECTED], color2);
    theme_manager_gdk_color_to_hex (&style->dark[GTK_STATE_SELECTED], color3);
    theme_manager_gdk_color_to_hex (&style->fg[GTK_STATE_SELECTED], color4);

    theme_manager_update_boxes_tags (theme,
                     color4,     /* header_foreground */
                     color2,     /* header_background */
                     color3,     /* header_line_background */
                     color1,     /* action_foreground */
                     "darkgrey", /* time_foreground */
                     "darkgrey", /* event_foreground */
                     color1,     /* link_foreground */
                     NULL,       /* text_foreground */
                     NULL,       /* text_background */
                     NULL);      /* highlight_foreground */
}

static void
theme_manager_update_boxes_theme (EmpathyThemeManager *manager,
                  EmpathyThemeBoxes   *theme)
{
    EmpathyThemeManagerPriv *priv = GET_PRIV (manager);

    if (strcmp (priv->name, "simple") == 0) {
        theme_manager_update_simple_tags (theme);
    }
    else if (strcmp (priv->name, "clean") == 0) {
        theme_manager_update_boxes_tags (theme,
                         "black",    /* header_foreground */
                         "#efefdf",  /* header_background */
                         "#e3e3d3",  /* header_line_background */
                         "brown4",   /* action_foreground */
                         "darkgrey", /* time_foreground */
                         "darkgrey", /* event_foreground */
                         "#49789e",  /* link_foreground */
                         NULL,       /* text_foreground */
                         NULL,       /* text_background */
                         NULL);      /* highlight_foreground */
    }
    else if (strcmp (priv->name, "blue") == 0) {
        theme_manager_update_boxes_tags (theme,
                         "black",    /* header_foreground */
                         "#88a2b4",  /* header_background */
                         "#7f96a4",  /* header_line_background */
                         "brown4",   /* action_foreground */
                         "darkgrey", /* time_foreground */
                         "#7f96a4",  /* event_foreground */
                         "#49789e",  /* link_foreground */
                         "black",    /* text_foreground */
                         "#adbdc8",  /* text_background */
                         "black");   /* highlight_foreground */
    }
}

EmpathyChatView *
empathy_theme_manager_create_view (EmpathyThemeManager *manager)
{
    EmpathyThemeManagerPriv *priv = GET_PRIV (manager);
    EmpathyThemeBoxes       *theme;

    g_return_val_if_fail (EMPATHY_IS_THEME_MANAGER (manager), NULL);

    DEBUG ("Using theme %s", priv->name);

    if (strcmp (priv->name, "classic") == 0)  {
        return EMPATHY_CHAT_VIEW (theme_manager_create_irc_view (manager));
    }

    theme = theme_manager_create_boxes_view (manager);
    theme_manager_update_boxes_theme (manager, theme);

    return EMPATHY_CHAT_VIEW (theme);
}

static void
theme_manager_color_hash_notify_cb (EmpathyThemeManager *manager)
{
    EmpathyThemeManagerPriv *priv = GET_PRIV (manager);

    /* FIXME: Make that work, it should update color when theme changes but
     * it doesnt seems to work with all themes. */

    if (strcmp (priv->name, "simple") == 0) {
        GList *l;

        /* We are using the simple theme which use the GTK theme color,
         * Update views to use the new color. */
        for (l = priv->boxes_views; l; l = l->next) {
            theme_manager_update_simple_tags (EMPATHY_THEME_BOXES (l->data));
        }
    }
}

static gboolean
theme_manager_ensure_theme_exists (const gchar *name)
{
    gint i;

    if (EMP_STR_EMPTY (name)) {
        return FALSE;
    }

    for (i = 0; themes[i]; i += 2) {
        if (strcmp (themes[i], name) == 0) {
            return TRUE;
        }
    }

    return FALSE;
}

static void
theme_manager_notify_name_cb (EmpathyConf *conf,
                  const gchar *key,
                  gpointer     user_data)
{
    EmpathyThemeManager     *manager = EMPATHY_THEME_MANAGER (user_data);
    EmpathyThemeManagerPriv *priv = GET_PRIV (manager);
    gchar                   *name = NULL;

    if (!empathy_conf_get_string (conf, key, &name) ||
        !theme_manager_ensure_theme_exists (name) ||
        !tp_strdiff (priv->name, name)) {
        if (!priv->name) {
            priv->name = g_strdup ("classic");
        }

        g_free (name);
        return;
    }

    g_free (priv->name);
    priv->name = name;

    if (!tp_strdiff (priv->name, "simple") ||
        !tp_strdiff (priv->name, "clean") ||
        !tp_strdiff (priv->name, "blue")) {
        GList *l;

        /* The theme changes to a boxed one, we can update boxed views */
        for (l = priv->boxes_views; l; l = l->next) {
            theme_manager_update_boxes_theme (manager,
                              EMPATHY_THEME_BOXES (l->data));
        }
    }

    g_signal_emit (manager, signals[THEME_CHANGED], 0, NULL);
}

static void
theme_manager_finalize (GObject *object)
{
    EmpathyThemeManagerPriv *priv = GET_PRIV (object);
    GList                   *l;

    empathy_conf_notify_remove (empathy_conf_get (), priv->name_notify_id);
    g_free (priv->name);

    for (l = priv->boxes_views; l; l = l->next) {
        g_object_weak_unref (G_OBJECT (l->data),
                     theme_manager_boxes_weak_notify_cb,
                     object);
    }
    g_list_free (priv->boxes_views);

    G_OBJECT_CLASS (empathy_theme_manager_parent_class)->finalize (object);
}

static void
empathy_theme_manager_class_init (EmpathyThemeManagerClass *klass)
{
    GObjectClass *object_class = G_OBJECT_CLASS (klass);

    signals[THEME_CHANGED] =
        g_signal_new ("theme-changed",
                  G_OBJECT_CLASS_TYPE (object_class),
                  G_SIGNAL_RUN_LAST,
                  0,
                  NULL, NULL,
                  g_cclosure_marshal_VOID__VOID,
                  G_TYPE_NONE,
                  0);

    g_type_class_add_private (object_class, sizeof (EmpathyThemeManagerPriv));

    object_class->finalize = theme_manager_finalize;
}

static void
empathy_theme_manager_init (EmpathyThemeManager *manager)
{
    EmpathyThemeManagerPriv *priv = G_TYPE_INSTANCE_GET_PRIVATE (manager,
        EMPATHY_TYPE_THEME_MANAGER, EmpathyThemeManagerPriv);

    manager->priv = priv;

    /* Take the theme name and track changes */
    priv->name_notify_id =
        empathy_conf_notify_add (empathy_conf_get (),
                     EMPATHY_PREFS_CHAT_THEME,
                     theme_manager_notify_name_cb,
                     manager);
    theme_manager_notify_name_cb (empathy_conf_get (),
                      EMPATHY_PREFS_CHAT_THEME,
                      manager);

    /* Track GTK color changes */
    priv->settings = gtk_settings_get_default ();
    g_signal_connect_swapped (priv->settings, "notify::color-hash",
                  G_CALLBACK (theme_manager_color_hash_notify_cb),
                  manager);
}

EmpathyThemeManager *
empathy_theme_manager_get (void)
{
    static EmpathyThemeManager *manager = NULL;

    if (!manager) {
        manager = g_object_new (EMPATHY_TYPE_THEME_MANAGER, NULL);
    }

    return manager;
}

const gchar **
empathy_theme_manager_get_themes (void)
{
    return themes;
}