Add 'Colorful tabs' extension

diff --git a/extensions/colorful-tabs.c b/extensions/colorful-tabs.c
new file mode 100644 (file)
index 0000000..bddb403
--- /dev/null
+++ b/extensions/colorful-tabs.c
@@ -0,0 +1,144 @@
+/*
+ Copyright (C) 2009 Christian Dywan <christian@twotoasts.de>
+
+ This library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Lesser General Public
+ License as published by the Free Software Foundation; either
+ version 2.1 of the License, or (at your option) any later version.
+
+ See the file COPYING for the full license text.
+*/
+
+#include <midori/midori.h>
+
+static void
+colorful_tabs_button_toggled_cb (GtkWidget*       button,
+                                 MidoriExtension* extension)
+{
+    midori_extension_set_boolean (extension, "tint",
+        !midori_extension_get_boolean (extension, "tint"));
+    /* FIXME: Update all tab colors */
+}
+
+static void
+colorful_tabs_view_notify_uri_cb (MidoriView*      view,
+                                  GParamSpec*      pspec,
+                                  MidoriExtension* extension)
+{
+    GtkWidget* label;
+    SoupURI* uri;
+    gchar* hash;
+    gchar* colorstr;
+    GdkColor color;
+
+    label = midori_view_get_proxy_tab_label (view);
+    if (!midori_extension_get_boolean (extension, "tint"))
+    {
+        gtk_widget_modify_bg (label, GTK_STATE_NORMAL, NULL);
+        gtk_widget_modify_bg (label, GTK_STATE_ACTIVE, NULL);
+        return;
+    }
+
+    /* Find a color that is unique to an address. We merely compute
+       a hash value, pick the first 6 + 1 characters and turn the
+       first into a hash sign, ie. #8b424b. In case a color is too
+       dark, we lighten it up a litte. Finally we make the event box
+       visible and modify its background. */
+
+    uri = soup_uri_new (midori_view_get_display_uri (view));
+    hash = g_compute_checksum_for_string (G_CHECKSUM_MD5, uri->host, -1);
+    soup_uri_free (uri);
+    colorstr = g_strndup (hash, 6 + 1);
+    g_free (hash);
+    colorstr[0] = '#';
+    gdk_color_parse (colorstr, &color);
+    if (color.red < 35000)
+        color.red += 25000 + (color.blue + 1) / 2;
+    if (color.green < 35000)
+        color.green += 25000 + (color.red + 1) / 2;
+    if (color.blue < 35000)
+        color.blue += 25000 + (color.green + 1) / 2;
+    gtk_event_box_set_visible_window (GTK_EVENT_BOX (label), TRUE);
+    gtk_widget_modify_bg (label, GTK_STATE_NORMAL, &color);
+    gtk_widget_modify_bg (label, GTK_STATE_ACTIVE, &color);
+}
+
+static void
+colorful_tabs_browser_add_tab_cb (MidoriBrowser*   browser,
+                                  MidoriView*      view,
+                                  MidoriExtension* extension)
+{
+    g_signal_connect (view, "notify::uri",
+        G_CALLBACK (colorful_tabs_view_notify_uri_cb), extension);
+}
+
+static void
+colorful_tabs_deactivate_cb (MidoriExtension* extension,
+                             GtkWidget*       bbox)
+{
+    gtk_widget_destroy (bbox);
+    g_signal_handlers_disconnect_by_func (
+        extension, colorful_tabs_deactivate_cb, bbox);
+    /* FIXME: Disconnect signals */
+    /* FIXME: Reset all tab colors */
+}
+
+static void
+colorful_tabs_app_add_browser_cb (MidoriApp*       app,
+                                  MidoriBrowser*   browser,
+                                  MidoriExtension* extension)
+{
+    GtkWidget* statusbar;
+    GtkWidget* bbox;
+    GtkWidget* button;
+
+    statusbar = katze_object_get_object (browser, "statusbar");
+    bbox = gtk_hbox_new (FALSE, 0);
+    button = gtk_check_button_new_with_label (_("Tint tabs distinctly"));
+    gtk_toggle_button_set_active (GTK_TOGGLE_BUTTON (button),
+        midori_extension_get_boolean (extension, "tint"));
+    gtk_box_pack_start (GTK_BOX (bbox), button, FALSE, FALSE, 2);
+    gtk_widget_show (button);
+    gtk_widget_show (bbox);
+    gtk_box_pack_start (GTK_BOX (statusbar), bbox, FALSE, FALSE, 3);
+
+    g_signal_connect (button, "toggled",
+        G_CALLBACK (colorful_tabs_button_toggled_cb), extension);
+    g_signal_connect (browser, "add-tab",
+        G_CALLBACK (colorful_tabs_browser_add_tab_cb), extension);
+    g_signal_connect (extension, "deactivate",
+        G_CALLBACK (colorful_tabs_deactivate_cb), bbox);
+}
+
+static void
+colorful_tabs_activate_cb (MidoriExtension* extension,
+                           MidoriApp*       app)
+{
+    KatzeArray* browsers;
+    MidoriBrowser* browser;
+    guint i;
+
+    browsers = katze_object_get_object (app, "browsers");
+    i = 0;
+    while ((browser = katze_array_get_nth_item (browsers, i++)))
+        colorful_tabs_app_add_browser_cb (app, browser, extension);
+    g_signal_connect (app, "add-browser",
+        G_CALLBACK (colorful_tabs_app_add_browser_cb), extension);
+}
+
+MidoriExtension*
+extension_init (void)
+{
+    MidoriExtension* extension = g_object_new (MIDORI_TYPE_EXTENSION,
+        "name", _("Colorful Tabs"),
+        "description", _("Tint each tab distinctly"),
+        "version", "0.1",
+        "authors", "Christian Dywan <christian@twotoasts.de>",
+        NULL);
+    midori_extension_install_boolean (extension, "tint", FALSE);
+
+    g_signal_connect (extension, "activate",
+        G_CALLBACK (colorful_tabs_activate_cb), NULL);
+
+    return extension;
+}