[gnome-builder/wip/slaf/xml-pack: 7/56] xml-pack: add a xml completion provider

[Sébastien Lafargue <slafargue src gnome org>]

commit c7f89c914e3f7a8f376efcd296a14b95ee145048
Author: Sebastien Lafargue <slafargue gnome org>
Date:   Mon Apr 3 23:48:24 2017 +0200

    xml-pack: add a xml completion provider

 plugins/xml-pack/ide-xml-completion-provider.c |  232 ++++++++++++++++++++++++
 plugins/xml-pack/ide-xml-completion-provider.h |   36 ++++
 plugins/xml-pack/meson.build                   |    2 +
 plugins/xml-pack/xml-pack-plugin.c             |    4 +
 plugins/xml-pack/xml-pack.plugin               |    4 +-
 5 files changed, 277 insertions(+), 1 deletions(-)
---
diff --git a/plugins/xml-pack/ide-xml-completion-provider.c b/plugins/xml-pack/ide-xml-completion-provider.c
new file mode 100644
index 0000000..8aad1d8
--- /dev/null
+++ b/plugins/xml-pack/ide-xml-completion-provider.c
@@ -0,0 +1,232 @@
+/* ide-xml-completion-provider.c
+ *
+ * Copyright (C) 2017 Sebastien Lafargue <slafargue gnome org>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#define G_LOG_DOMAIN "xml-completion"
+
+#include <libpeas/peas.h>
+
+#include "ide-xml-completion-provider.h"
+#include "ide-xml-position.h"
+#include "ide-xml-service.h"
+
+struct _IdeXmlCompletionProvider
+{
+  IdeObject parent_instance;
+};
+
+static void completion_provider_init (GtkSourceCompletionProviderIface *);
+
+G_DEFINE_DYNAMIC_TYPE_EXTENDED (IdeXmlCompletionProvider,
+                                ide_xml_completion_provider,
+                                IDE_TYPE_OBJECT,
+                                0,
+                                G_IMPLEMENT_INTERFACE (GTK_SOURCE_TYPE_COMPLETION_PROVIDER, 
completion_provider_init)
+                                G_IMPLEMENT_INTERFACE (IDE_TYPE_COMPLETION_PROVIDER, NULL))
+
+enum {
+  PROP_0,
+  N_PROPS
+};
+
+static GParamSpec *properties [N_PROPS];
+
+typedef struct
+{
+  IdeXmlCompletionProvider    *self;
+  GtkSourceCompletionContext  *completion_context;
+  IdeFile                     *ifile;
+  IdeBuffer                   *buffer;
+  gint                         line;
+  gint                         line_offset;
+} PopulateState;
+
+static void
+populate_state_free (PopulateState *state)
+{
+  g_assert (state != NULL);
+
+  g_object_unref (state->self);
+  g_object_unref (state->completion_context);
+  g_object_unref (state->ifile);
+  g_object_unref (state->buffer);
+}
+
+static void
+populate_cb (GObject      *object,
+             GAsyncResult *result,
+             gpointer      user_data)
+{
+  IdeXmlService *service = (IdeXmlService *)object;
+  PopulateState *state = (PopulateState *)user_data;
+  IdeXmlCompletionProvider *self = state->self;
+  g_autoptr (IdeXmlPosition) position = NULL;
+  GtkSourceCompletionItem *item;
+  g_autofree gchar *text = NULL;
+  g_autofree gchar *label = NULL;
+  g_autoptr (GList) results = NULL;
+  GError *error = NULL;
+
+  g_assert (IDE_IS_XML_COMPLETION_PROVIDER (self));
+  g_assert (IDE_IS_XML_SERVICE (service));
+
+  position = ide_xml_service_get_position_from_cursor_finish (service, result, &error);
+  text = g_strdup ("xml item text");
+  label = g_strdup ("xml item label");
+  item = g_object_new (GTK_SOURCE_TYPE_COMPLETION_ITEM,
+                       "text", text,
+                       "label", label,
+                       NULL);
+
+  /* TODO: show position content for debug */
+
+  results = g_list_prepend (results, item);
+  gtk_source_completion_context_add_proposals (state->completion_context,
+                                               GTK_SOURCE_COMPLETION_PROVIDER (self),
+                                               results,
+                                               TRUE);
+
+  populate_state_free (state);
+}
+
+static void
+ide_xml_completion_provider_populate (GtkSourceCompletionProvider *self,
+                                      GtkSourceCompletionContext  *completion_context)
+{
+  IdeContext *ide_context;
+  IdeXmlService *service;
+  GtkTextIter iter;
+  GCancellable *cancellable;
+  GtkTextBuffer *buffer;
+  PopulateState *state;
+
+  g_assert (IDE_IS_XML_COMPLETION_PROVIDER (self));
+  g_assert (GTK_SOURCE_IS_COMPLETION_CONTEXT (completion_context));
+
+  ide_context = ide_object_get_context (IDE_OBJECT (self));
+  service = ide_context_get_service_typed (ide_context, IDE_TYPE_XML_SERVICE);
+
+  gtk_source_completion_context_get_iter (completion_context, &iter);
+
+  cancellable = g_cancellable_new ();
+  state = g_slice_new0 (PopulateState);
+
+  state->self = g_object_ref (self);
+  state->completion_context = g_object_ref (completion_context);
+  state->buffer = g_object_ref (gtk_text_iter_get_buffer (&iter));
+  state->ifile = g_object_ref (ide_buffer_get_file (IDE_BUFFER (buffer)));
+  state->line = gtk_text_iter_get_line (&iter);
+  state->line_offset = gtk_text_iter_get_line_offset (&iter);
+
+  printf ("path:%s at (%i,%i)\n",
+          g_file_get_path (ide_file_get_file (state->ifile)),
+          state->line,
+          state->line_offset);
+
+  ide_xml_service_get_position_from_cursor_async (service,
+                                                  state->ifile,
+                                                  IDE_BUFFER (buffer),
+                                                  state->line,
+                                                  state->line_offset,
+                                                  cancellable,
+                                                  populate_cb,
+                                                  state);
+}
+
+static GdkPixbuf *
+ide_xml_completion_provider_get_icon (GtkSourceCompletionProvider *provider)
+{
+  return NULL;
+}
+
+IdeXmlCompletionProvider *
+ide_xml_completion_provider_new (void)
+{
+  return g_object_new (IDE_TYPE_XML_COMPLETION_PROVIDER, NULL);
+}
+
+static void
+ide_xml_completion_provider_finalize (GObject *object)
+{
+  IdeXmlCompletionProvider *self = (IdeXmlCompletionProvider *)object;
+
+  G_OBJECT_CLASS (ide_xml_completion_provider_parent_class)->finalize (object);
+}
+
+static void
+ide_xml_completion_provider_get_property (GObject    *object,
+                                          guint       prop_id,
+                                          GValue     *value,
+                                          GParamSpec *pspec)
+{
+  IdeXmlCompletionProvider *self = IDE_XML_COMPLETION_PROVIDER (object);
+
+  switch (prop_id)
+    {
+    default:
+      G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
+    }
+}
+
+static void
+ide_xml_completion_provider_set_property (GObject      *object,
+                                          guint         prop_id,
+                                          const GValue *value,
+                                          GParamSpec   *pspec)
+{
+  IdeXmlCompletionProvider *self = IDE_XML_COMPLETION_PROVIDER (object);
+
+  switch (prop_id)
+    {
+    default:
+      G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
+    }
+}
+
+static void
+ide_xml_completion_provider_class_finalize (IdeXmlCompletionProviderClass *klass)
+{
+}
+
+static void
+ide_xml_completion_provider_class_init (IdeXmlCompletionProviderClass *klass)
+{
+  GObjectClass *object_class = G_OBJECT_CLASS (klass);
+
+  object_class->finalize = ide_xml_completion_provider_finalize;
+  object_class->get_property = ide_xml_completion_provider_get_property;
+  object_class->set_property = ide_xml_completion_provider_set_property;
+}
+
+static void
+ide_xml_completion_provider_init (IdeXmlCompletionProvider *self)
+{
+  printf ("xml completion provider init\n");
+}
+
+static void
+completion_provider_init (GtkSourceCompletionProviderIface *iface)
+{
+  iface->get_icon = ide_xml_completion_provider_get_icon;
+  iface->populate = ide_xml_completion_provider_populate;
+}
+
+void
+_ide_xml_completion_provider_register_type (GTypeModule *module)
+{
+  ide_xml_completion_provider_register_type (module);
+}
diff --git a/plugins/xml-pack/ide-xml-completion-provider.h b/plugins/xml-pack/ide-xml-completion-provider.h
new file mode 100644
index 0000000..f60e837
--- /dev/null
+++ b/plugins/xml-pack/ide-xml-completion-provider.h
@@ -0,0 +1,36 @@
+/* ide-xml-completion-provider.h
+ *
+ * Copyright (C) 2017 Sebastien Lafargue <slafargue gnome org>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef IDE_XML_COMPLETION_PROVIDER_H
+#define IDE_XML_COMPLETION_PROVIDER_H
+
+#include <gtksourceview/gtksource.h>
+#include <ide.h>
+
+G_BEGIN_DECLS
+
+#define IDE_TYPE_XML_COMPLETION_PROVIDER (ide_xml_completion_provider_get_type())
+
+G_DECLARE_FINAL_TYPE (IdeXmlCompletionProvider, ide_xml_completion_provider, IDE, XML_COMPLETION_PROVIDER, 
IdeObject)
+
+IdeXmlCompletionProvider *ide_xml_completion_provider_new (void);
+
+G_END_DECLS
+
+#endif /* IDE_XML_COMPLETION_PROVIDER_H */
+
diff --git a/plugins/xml-pack/meson.build b/plugins/xml-pack/meson.build
index 98c1c21..bd18442 100644
--- a/plugins/xml-pack/meson.build
+++ b/plugins/xml-pack/meson.build
@@ -3,6 +3,8 @@ if get_option('with_xml_pack')
 xml_pack_sources = [
   'ide-xml-analysis.c',
   'ide-xml-analysis.h',
+  'ide-xml-completion-provider.c',
+  'ide-xml-completion-provider.h',
   'ide-xml-diagnostic-provider.c',
   'ide-xml-diagnostic-provider.h',
   'ide-xml-highlighter.c',
diff --git a/plugins/xml-pack/xml-pack-plugin.c b/plugins/xml-pack/xml-pack-plugin.c
index 8d69507..41d20db 100644
--- a/plugins/xml-pack/xml-pack-plugin.c
+++ b/plugins/xml-pack/xml-pack-plugin.c
@@ -18,12 +18,14 @@
 
 #include <libpeas/peas.h>
 
+#include "ide-xml-completion-provider.h"
 #include "ide-xml-diagnostic-provider.h"
 #include "ide-xml-highlighter.h"
 #include "ide-xml-indenter.h"
 #include "ide-xml-service.h"
 #include "ide-xml-symbol-resolver.h"
 
+void _ide_xml_completion_provider_register_type (GTypeModule *module);
 void _ide_xml_highlighter_register_type (GTypeModule *module);
 void _ide_xml_indenter_register_type (GTypeModule *module);
 void _ide_xml_symbol_resolver_register_type (GTypeModule *module);
@@ -32,11 +34,13 @@ void _ide_xml_service_register_type (GTypeModule *module);
 void
 peas_register_types (PeasObjectModule *module)
 {
+  _ide_xml_completion_provider_register_type (G_TYPE_MODULE (module));
   _ide_xml_highlighter_register_type (G_TYPE_MODULE (module));
   _ide_xml_indenter_register_type (G_TYPE_MODULE (module));
   _ide_xml_symbol_resolver_register_type (G_TYPE_MODULE (module));
   _ide_xml_service_register_type (G_TYPE_MODULE (module));
 
+  peas_object_module_register_extension_type (module, IDE_TYPE_COMPLETION_PROVIDER, 
IDE_TYPE_XML_COMPLETION_PROVIDER);
   peas_object_module_register_extension_type (module, IDE_TYPE_DIAGNOSTIC_PROVIDER, 
IDE_TYPE_XML_DIAGNOSTIC_PROVIDER);
   peas_object_module_register_extension_type (module, IDE_TYPE_HIGHLIGHTER, IDE_TYPE_XML_HIGHLIGHTER);
   peas_object_module_register_extension_type (module, IDE_TYPE_INDENTER, IDE_TYPE_XML_INDENTER);
diff --git a/plugins/xml-pack/xml-pack.plugin b/plugins/xml-pack/xml-pack.plugin
index 62891cd..4ec42e0 100644
--- a/plugins/xml-pack/xml-pack.plugin
+++ b/plugins/xml-pack/xml-pack.plugin
@@ -1,6 +1,6 @@
 [Plugin]
 Module=xml-pack-plugin
-Name=XML Auto-Indenter, highlighter, resolver, diagnostics
+Name=XML Auto-Indenter, completion, highlighter, resolver, diagnostics
 Description=Provides language support features for XML
 Authors=Christian Hergert <christian hergert me>
 Copyright=Copyright © 2015 Christian Hergert
@@ -13,3 +13,5 @@ X-Highlighter-Languages=xml,html
 X-Highlighter-Languages-Priority=0
 X-Diagnostic-Provider-Languages=xml,html
 X-Diagnostic-Provider-Languages-Priority=0
+X-Completion-Provider-Languages=xml,html
+X-Completion-Provider-Languages-Priority=0