[evolution] I#1867 - itip-formatter: Colorize meeting summary with the event color

[Milan Crha <mcrha src gnome org>]

commit 4d98959063b2868930362798f911a3400110185e
Author: Milan Crha <mcrha redhat com>
Date:   Wed Apr 20 11:13:46 2022 +0200

    I#1867 - itip-formatter: Colorize meeting summary with the event color
    
    Closes https://gitlab.gnome.org/GNOME/evolution/-/issues/1867

 src/modules/itip-formatter/itip-view.c | 45 +++++++++++++++++++++++++++++++++-
 1 file changed, 44 insertions(+), 1 deletion(-)
---
diff --git a/src/modules/itip-formatter/itip-view.c b/src/modules/itip-formatter/itip-view.c
index 262f77efd8..8781f549c0 100644
--- a/src/modules/itip-formatter/itip-view.c
+++ b/src/modules/itip-formatter/itip-view.c
@@ -1113,7 +1113,7 @@ append_text_table_row (GString *buffer,
                g_string_append_printf (
                        buffer,
                        "<tr id=\"%s\"%s><td colspan=\"2\">%s</td></tr>\n",
-                       id, g_strcmp0 (id, TABLE_ROW_SUMMARY) == 0 ? "" : " hidden=\"\"", value ? value : "");
+                       id, g_strcmp0 (id, TABLE_ROW_SUMMARY) == 0 ? " class=\"itip-summary\"" : " 
hidden=\"\"", value ? value : "");
 
        }
 
@@ -6847,6 +6847,49 @@ itip_view_init_view (ItipView *view)
        itip_view_extract_attendee_info (view);
 
        icomp = e_cal_component_get_icalcomponent (view->priv->comp);
+       prop = i_cal_component_get_first_property (icomp, I_CAL_COLOR_PROPERTY);
+       if (!prop && view->priv->main_comp)
+               prop = i_cal_component_get_first_property (view->priv->main_comp, I_CAL_COLOR_PROPERTY);
+       if (prop) {
+               GdkRGBA bgcolor, fgcolor;
+               const gchar *color_spec;
+
+               color_spec = i_cal_property_get_color (prop);
+               if (color_spec && gdk_rgba_parse (&bgcolor, color_spec)) {
+                       EWebView *web_view;
+
+                       web_view = itip_view_ref_web_view (view);
+                       if (web_view) {
+                               gchar *css;
+
+                               fgcolor = e_utils_get_text_color_for_background (&bgcolor);
+
+                               #define as_uchar_color(_val) ((guchar) (_val * 255))
+
+                               css = g_strdup_printf (
+                                       "   background-color: #%02x%02x%02x;"
+                                       "   color: #%02x%02x%02x;",
+                                       as_uchar_color (bgcolor.red),
+                                       as_uchar_color (bgcolor.green),
+                                       as_uchar_color (bgcolor.blue),
+                                       as_uchar_color (fgcolor.red),
+                                       as_uchar_color (fgcolor.green),
+                                       as_uchar_color (fgcolor.blue));
+
+                               #undef as_uchar_color
+
+                               e_web_view_jsc_run_script (WEBKIT_WEB_VIEW (web_view), 
e_web_view_get_cancellable (web_view),
+                                       "Evo.AddRuleIntoStyleSheet(%s, %s, %s, %s);",
+                                       view->priv->part_id, "itip-css", ".itip-summary", css);
+
+                               g_object_unref (web_view);
+                               g_free (css);
+                       }
+               }
+
+               g_clear_object (&prop);
+       }
+
        prop = e_cal_util_component_find_x_property (icomp, "X-ALT-DESC");
 
        if (prop) {