[gtksourceview/wip/chergert/gsv-gtk4] snippets: wrap snippet model with proposal model

[Christian Hergert <chergert src gnome org>]

commit a1c42486f22270107925342ae6858b3b378622a9
Author: Christian Hergert <chergert redhat com>
Date:   Wed Sep 9 20:49:53 2020 -0700

    snippets: wrap snippet model with proposal model

 .../snippets/gtksourcecompletionsnippets.c         | 98 +++++++++++++++++++++-
 1 file changed, 96 insertions(+), 2 deletions(-)
---
diff --git a/gtksourceview/completion-providers/snippets/gtksourcecompletionsnippets.c 
b/gtksourceview/completion-providers/snippets/gtksourcecompletionsnippets.c
index eb782b47..140b139a 100644
--- a/gtksourceview/completion-providers/snippets/gtksourcecompletionsnippets.c
+++ b/gtksourceview/completion-providers/snippets/gtksourcecompletionsnippets.c
@@ -49,6 +49,80 @@
  * Since: 5.0
  */
 
+struct _GtkSourceSnippetResults
+{
+       GObject     parent_instance;
+       GListModel *snippets;
+};
+
+static void list_model_iface_init (GListModelInterface *iface);
+
+#define GTK_SOURCE_TYPE_SNIPPET_RESULTS (gtk_source_snippet_results_get_type())
+G_DECLARE_FINAL_TYPE (GtkSourceSnippetResults, gtk_source_snippet_results, GTK_SOURCE, SNIPPET_RESULTS, 
GObject)
+G_DEFINE_TYPE_WITH_CODE (GtkSourceSnippetResults, gtk_source_snippet_results, G_TYPE_OBJECT,
+                         G_IMPLEMENT_INTERFACE (G_TYPE_LIST_MODEL, list_model_iface_init))
+
+static GType
+gtk_source_snippet_results_get_item_type (GListModel *model)
+{
+       return GTK_SOURCE_TYPE_COMPLETION_PROPOSAL;
+}
+
+static guint
+gtk_source_snippet_results_get_n_items (GListModel *model)
+{
+       GtkSourceSnippetResults *self = (GtkSourceSnippetResults *)model;
+       return g_list_model_get_n_items (self->snippets);
+}
+
+static gpointer
+gtk_source_snippet_results_get_item (GListModel *model,
+                                     guint       position)
+{
+       GtkSourceSnippetResults *self = (GtkSourceSnippetResults *)model;
+       GtkSourceSnippet *snippet = g_list_model_get_item (self->snippets, position);
+       return gtk_source_completion_snippets_proposal_new (snippet);
+}
+
+static void
+list_model_iface_init (GListModelInterface *iface)
+{
+       iface->get_item_type = gtk_source_snippet_results_get_item_type;
+       iface->get_n_items = gtk_source_snippet_results_get_n_items;
+       iface->get_item = gtk_source_snippet_results_get_item;
+}
+
+static GListModel *
+gtk_source_snippet_results_new (GListModel *base_model)
+{
+       GtkSourceSnippetResults *self = g_object_new (GTK_SOURCE_TYPE_SNIPPET_RESULTS, NULL);
+       self->snippets = g_object_ref (base_model);
+       return G_LIST_MODEL (self);
+}
+
+static void
+gtk_source_snippet_results_finalize (GObject *object)
+{
+       GtkSourceSnippetResults *self = (GtkSourceSnippetResults *)object;
+
+       g_clear_object (&self->snippets);
+
+       G_OBJECT_CLASS (gtk_source_snippet_results_parent_class)->finalize (object);
+}
+
+static void
+gtk_source_snippet_results_class_init (GtkSourceSnippetResultsClass *klass)
+{
+       GObjectClass *object_class = G_OBJECT_CLASS (klass);
+
+       object_class->finalize = gtk_source_snippet_results_finalize;
+}
+
+static void
+gtk_source_snippet_results_init (GtkSourceSnippetResults *self)
+{
+}
+
 typedef struct
 {
        char *title;
@@ -86,6 +160,7 @@ gtk_source_completion_snippets_populate (GtkSourceCompletionProvider  *provider,
        const gchar *language_id = NULL;
        GtkTextIter begin, end;
        GListModel *matches;
+       GListModel *results = NULL;
        gchar *word;
 
        if (!gtk_source_completion_context_get_bounds (context, &begin, &end))
@@ -114,9 +189,23 @@ gtk_source_completion_snippets_populate (GtkSourceCompletionProvider  *provider,
 
        matches = gtk_source_snippet_manager_list_matching (manager, NULL, language_id, word);
 
+       if (matches != NULL)
+       {
+               results = gtk_source_snippet_results_new (matches);
+       }
+
+       g_clear_object (&matches);
        g_free (word);
 
-       return matches;
+       if (results == NULL)
+       {
+               g_set_error (error,
+                            G_IO_ERROR,
+                            G_IO_ERROR_NOT_SUPPORTED,
+                            "No results");
+       }
+
+       return results;
 }
 
 static gchar *
@@ -189,7 +278,7 @@ gtk_source_completion_snippets_display (GtkSourceCompletionProvider *provider,
        if (column == GTK_SOURCE_COMPLETION_COLUMN_TYPED_TEXT)
        {
                gtk_source_completion_cell_set_text (cell,
-                                                    gtk_source_snippet_get_name (snippet));
+                                                    gtk_source_snippet_get_trigger (snippet));
        }
        else if (column == GTK_SOURCE_COMPLETION_COLUMN_ICON)
        {
@@ -197,6 +286,11 @@ gtk_source_completion_snippets_display (GtkSourceCompletionProvider *provider,
                                                          "completion-snippet-symbolic");
        }
        else if (column == GTK_SOURCE_COMPLETION_COLUMN_COMMENT)
+       {
+               gtk_source_completion_cell_set_text (cell,
+                                                    gtk_source_snippet_get_trigger (snippet));
+       }
+       else if (column == GTK_SOURCE_COMPLETION_COLUMN_DETAILS)
        {
                gtk_source_completion_cell_set_text (cell,
                                                     gtk_source_snippet_get_description (snippet));