[gtksourceview/wip/chergert/gsv-gtk4] completion: register CSS at gtk_source_init()

[Christian Hergert <chergert src gnome org>]

commit 384dff28728375c8702453f328124474cea9fd56
Author: Christian Hergert <chergert redhat com>
Date:   Sun Aug 30 14:38:56 2020 -0700

    completion: register CSS at gtk_source_init()

 gtksourceview/GtkSourceView.css           | 94 +++++++++++++++++++++++++++++++
 gtksourceview/gtksourceinit.c             | 23 ++++++++
 gtksourceview/gtksourceview.gresource.xml |  3 +
 3 files changed, 120 insertions(+)
---
diff --git a/gtksourceview/GtkSourceView.css b/gtksourceview/GtkSourceView.css
new file mode 100644
index 000000000..fd8b06ca1
--- /dev/null
+++ b/gtksourceview/GtkSourceView.css
@@ -0,0 +1,94 @@
+@define-color selected_border_color shade(@theme_selected_bg_color, 0.9);
+
+GtkSourceAssistant {
+  background-color: @theme_bg_color;
+  border-radius: 7px;
+  font: initial;
+  margin: 10px 10px 10px 10px;
+  box-shadow: 0 3px 5px 1px @wm_shadow,
+              0 0 0 1px alpha(@wm_border, 1);
+  outline: 1px solid alpha(@wm_highlight, 0.25);
+  margin: 20px;
+  background: @theme_bg_color;
+}
+
+GtkSourceAssistant.completion {
+  background-color: @content_view_bg;
+  border: none;
+  min-width: 150px;
+}
+GtkSourceAssistant.completion scrollbar.vertical slider {
+  min-height: 10px;
+}
+GtkSourceAssistant.completion scrollbar.vertical {
+  border-top-right-radius: 5px;
+}
+GtkSourceAssistant.completion scrolledwindow:last-child scrollbar.vertical {
+  border-bottom-right-radius: 5px;
+}
+GtkSourceAssistant.completion list {
+  border-top-left-radius: 5px;
+  border-top-right-radius: 5px;
+  margin: 0px;
+}
+GtkSourceAssistant.completion list,
+GtkSourceAssistant.completion list row:not(:selected):not(:hover),
+GtkSourceAssistant.completion list row cell {
+  background: transparent;
+}
+GtkSourceAssistant.completion list row {
+  transition: none;
+  box-shadow: none;
+}
+GtkSourceAssistant.completion list row:first-child {
+  border-top-left-radius: 5px;
+  border-top-right-radius: 5px;
+}
+GtkSourceAssistant.completion scrolledwindow:last-child list row:last-child {
+  border-bottom-left-radius: 5px;
+  border-bottom-right-radius: 5px;
+}
+GtkSourceAssistant.completion list row cell.icon {
+  padding: 6px;
+  min-width: 16px;
+  min-height: 16px;
+}
+GtkSourceAssistant.completion list row cell.typed-text {
+  margin-left: 6px;
+  margin-right: 6px;
+}
+GtkSourceAssistant.completion list row cell.after {
+  margin-right: 6px;
+}
+GtkSourceAssistant.completion list row cell.before {
+  opacity: 0.65;
+}
+GtkSourceAssistant.completion list row box.more button {
+  margin: 0px;
+  padding: 0px;
+}
+GtkSourceAssistant.completion list row box.more button image {
+  margin: 0px;
+  padding: 0px;
+}
+GtkSourceAssistant.completion .details {
+  border-top: 1px solid @borders;
+  border-bottom-left-radius: 5px;
+  border-bottom-right-radius: 5px;
+  background-color: @theme_bg_color;
+  padding-left: 6px;
+  padding-right: 3px;
+}
+GtkSourceAssistant.completion .details cell {
+  margin-left: 24px;
+  margin-bottom: 8px;
+}
+GtkSourceAssistant.completion .details button.flat {
+  min-height: 8px;
+  margin: 3px 0px;
+  padding: 3px 6px;
+}
+
+GtkSourceAssistant.completion-info {
+  padding: 6px;
+}
diff --git a/gtksourceview/gtksourceinit.c b/gtksourceview/gtksourceinit.c
index 0e10b0471..8e4dcd463 100644
--- a/gtksourceview/gtksourceinit.c
+++ b/gtksourceview/gtksourceinit.c
@@ -24,6 +24,10 @@
 #include "gtksourcebuffer.h"
 #include "gtksourcebufferinputstream-private.h"
 #include "gtksourcebufferoutputstream-private.h"
+#include "gtksourcecompletion.h"
+#include "gtksourcecompletioncontext.h"
+#include "gtksourcecompletionproposal.h"
+#include "gtksourcecompletionprovider.h"
 #include "gtksourcefileloader.h"
 #include "gtksourcefilesaver.h"
 #include "gtksourcegutterrenderer.h"
@@ -161,6 +165,7 @@ gtk_source_init (void)
 
        if (!done)
        {
+               GdkDisplay *display;
                gchar *locale_dir;
 
                locale_dir = get_locale_dir ();
@@ -179,6 +184,10 @@ gtk_source_init (void)
                g_type_ensure (GTK_SOURCE_TYPE_BUFFER);
                g_type_ensure (GTK_SOURCE_TYPE_BUFFER_INPUT_STREAM);
                g_type_ensure (GTK_SOURCE_TYPE_BUFFER_OUTPUT_STREAM);
+               g_type_ensure (GTK_SOURCE_TYPE_COMPLETION);
+               g_type_ensure (GTK_SOURCE_TYPE_COMPLETION_CONTEXT);
+               g_type_ensure (GTK_SOURCE_TYPE_COMPLETION_PROVIDER);
+               g_type_ensure (GTK_SOURCE_TYPE_COMPLETION_PROPOSAL);
                g_type_ensure (GTK_SOURCE_TYPE_FILE_LOADER);
                g_type_ensure (GTK_SOURCE_TYPE_FILE_SAVER);
                g_type_ensure (GTK_SOURCE_TYPE_GUTTER_RENDERER);
@@ -190,6 +199,20 @@ gtk_source_init (void)
                g_type_ensure (GTK_SOURCE_TYPE_STYLE_SCHEME_CHOOSER_WIDGET);
                g_type_ensure (GTK_SOURCE_TYPE_VIEW);
 
+               display = gdk_display_get_default ();
+
+               if (display != NULL)
+               {
+                       GtkCssProvider *css_provider = gtk_css_provider_new ();
+
+                       gtk_css_provider_load_from_resource (css_provider,
+                                                            
"/org/gnome/gtksourceview/css/GtkSourceView.css");
+                       gtk_style_context_add_provider_for_display (display,
+                                                                   GTK_STYLE_PROVIDER (css_provider),
+                                                                   
GTK_STYLE_PROVIDER_PRIORITY_APPLICATION-1);
+                       g_clear_object (&css_provider);
+               }
+
                done = TRUE;
        }
 }
diff --git a/gtksourceview/gtksourceview.gresource.xml b/gtksourceview/gtksourceview.gresource.xml
index 182638ad0..682563130 100644
--- a/gtksourceview/gtksourceview.gresource.xml
+++ b/gtksourceview/gtksourceview.gresource.xml
@@ -1,5 +1,8 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <gresources>
+  <gresource prefix="/org/gnome/gtksourceview/css/">
+    <file>GtkSourceView.css</file>
+  </gresource>
   <gresource prefix="/org/gnome/gtksourceview/ui">
     <file preprocess="xml-stripblanks">gtksourcecompletionlist.ui</file>
     <file preprocess="xml-stripblanks">gtksourcecompletionlistboxrow.ui</file>