[evolution/gnome-3-36] I#799 - EAlertBar: Text part doesn't work well for long text

[Milan Crha <mcrha src gnome org>]

commit 41e37a1289f3767ad6325f3f13e7dcacbadf96de
Author: Milan Crha <mcrha redhat com>
Date:   Fri Mar 6 09:52:45 2020 +0100

    I#799 - EAlertBar: Text part doesn't work well for long text
    
    Closes https://gitlab.gnome.org/GNOME/evolution/issues/799

 src/e-util/e-alert-bar.c | 37 +++++++++++++++++++++++++++++++++++--
 1 file changed, 35 insertions(+), 2 deletions(-)
---
diff --git a/src/e-util/e-alert-bar.c b/src/e-util/e-alert-bar.c
index 23cfe68ee0..aa511e95ad 100644
--- a/src/e-util/e-alert-bar.c
+++ b/src/e-util/e-alert-bar.c
@@ -53,10 +53,10 @@ e_scrolled_window_get_preferred_height (GtkWidget *widget,
        max_height = gtk_scrolled_window_get_max_content_height (scrolled_window);
 
        if (min_height > 0 && min_height < *minimum_size)
-               *minimum_size = min_height + 1;
+               *minimum_size = min_height + 2;
 
        if (max_height > 0 && max_height < *natural_size)
-               *natural_size = max_height + 1;
+               *natural_size = max_height + 2;
 }
 
 static void
@@ -350,6 +350,29 @@ alert_bar_dispose (GObject *object)
        G_OBJECT_CLASS (e_alert_bar_parent_class)->dispose (object);
 }
 
+static void
+alert_bar_add_css_style (GtkWidget *widget,
+                        const gchar *css)
+{
+       GtkCssProvider *provider;
+       GError *error = NULL;
+
+       provider = gtk_css_provider_new ();
+
+       if (gtk_css_provider_load_from_data (provider, css, -1, &error)) {
+               GtkStyleContext *style_context;
+
+               style_context = gtk_widget_get_style_context (widget);
+
+               gtk_style_context_add_provider (style_context, GTK_STYLE_PROVIDER (provider), 
GTK_STYLE_PROVIDER_PRIORITY_APPLICATION);
+       } else {
+               g_warning ("%s: Failed to parse CSS for %s: %s", G_STRFUNC, G_OBJECT_TYPE_NAME (widget), 
error ? error->message : "Unknown error");
+       }
+
+       g_clear_object (&provider);
+       g_clear_error (&error);
+}
+
 static void
 alert_bar_constructed (GObject *object)
 {
@@ -412,6 +435,16 @@ alert_bar_constructed (GObject *object)
        g_signal_connect (priv->message_label, "size-allocate",
                G_CALLBACK (alert_bar_message_label_size_allocate_cb), object);
 
+       widget = gtk_bin_get_child (GTK_BIN (container));
+
+       if (GTK_IS_VIEWPORT (widget)) {
+               gtk_viewport_set_shadow_type (GTK_VIEWPORT (widget), GTK_SHADOW_NONE);
+
+               alert_bar_add_css_style (widget, "viewport { background: none; border: none; }");
+       }
+
+       alert_bar_add_css_style (container, "scrolledwindow { background: none; border: none; }");
+
        /* Disable animation of the revealer, until GtkInfoBar's bug #710888 is fixed */
        revealer = gtk_widget_get_template_child (GTK_WIDGET (object), GTK_TYPE_INFO_BAR, "revealer");
        if (revealer) {