[gnome-builder/wip/code-assistance: 3/5] code-assist: add plumbing for code-assist module.

[Christian Hergert <chergert src gnome org>]

commit 3db950dc31a39741d7e62c2f910a0fa9a461c0cc
Author: Christian Hergert <christian hergert me>
Date:   Sat Oct 18 13:32:44 2014 -0700

    code-assist: add plumbing for code-assist module.

 src/code-assistant/gb-source-code-assistant.c |  284 -------------------------
 src/code-assistant/gb-source-code-assistant.h |   56 -----
 src/editor/gb-editor-code-assistant.c         |  109 ++++++++++
 src/editor/gb-editor-code-assistant.h         |   31 +++
 src/editor/gb-editor-tab-private.h            |    7 +
 src/editor/gb-editor-tab.c                    |   31 +++-
 src/gnome-builder.mk                          |    5 +-
 7 files changed, 179 insertions(+), 344 deletions(-)
---
diff --git a/src/editor/gb-editor-code-assistant.c b/src/editor/gb-editor-code-assistant.c
new file mode 100644
index 0000000..71e03f4
--- /dev/null
+++ b/src/editor/gb-editor-code-assistant.c
@@ -0,0 +1,109 @@
+/* gb-editor-code-assistant.c
+ *
+ * Copyright (C) 2014 Christian Hergert <christian hergert me>
+ *
+ * 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 "code-assistant"
+
+#include "gb-editor-code-assistant.h"
+#include "gb-editor-tab-private.h"
+#include "gb-log.h"
+#include "gca-service.h"
+
+static void
+gb_editor_code_assistant_buffer_changed (GbEditorDocument *document,
+                                         GbEditorTab      *tab)
+{
+  g_return_if_fail (GB_IS_EDITOR_TAB (tab));
+  g_return_if_fail (GB_IS_EDITOR_DOCUMENT (document));
+
+}
+
+/**
+ * gb_editor_code_assistant_init:
+ *
+ * Initializes the code assistant based on the open file, source language,
+ * and document buffer.
+ *
+ * This will hook to the gnome-code-assistance service to provide warnings
+ * if possible.
+ */
+void
+gb_editor_code_assistant_init (GbEditorTab *tab)
+{
+  GbEditorTabPrivate *priv;
+  GtkSourceLanguage *language;
+  const gchar *lang_id;
+  gchar *name;
+  gchar *path;
+
+  ENTRY;
+
+  g_return_if_fail (GB_IS_EDITOR_TAB (tab));
+  g_return_if_fail (!tab->priv->gca_service);
+
+  priv = tab->priv;
+
+  language = gtk_source_buffer_get_language (GTK_SOURCE_BUFFER (priv->document));
+  if (!language)
+    EXIT;
+
+  lang_id = gtk_source_language_get_id (language);
+  name = g_strdup_printf ("org.gnome.CodeAssist.v1.%s", lang_id);
+  path = g_strdup_printf ("/org/gnome/CodeAssist/v1/%s", lang_id);
+
+  priv->gca_service =
+    gca_service_proxy_new_for_bus_sync (G_BUS_TYPE_SESSION,
+                                        G_DBUS_PROXY_FLAGS_NONE,
+                                        name, path, NULL, NULL);
+
+  g_free (name);
+  g_free (path);
+
+  if (!priv->gca_service)
+    {
+      g_message ("No code assistance found for language \"%s\"", lang_id);
+      EXIT;
+    }
+
+  priv->gca_buffer_changed_handler =
+    g_signal_connect (priv->document, "changed",
+                      G_CALLBACK (gb_editor_code_assistant_buffer_changed),
+                      tab);
+}
+
+void
+gb_editor_code_assistant_destroy (GbEditorTab *tab)
+{
+  GbEditorTabPrivate *priv;
+
+  ENTRY;
+
+  g_return_if_fail (GB_IS_EDITOR_TAB (tab));
+
+  priv = tab->priv;
+
+  g_clear_object (&priv->gca_service);
+
+  if (priv->gca_buffer_changed_handler)
+    {
+      g_signal_handler_disconnect (priv->document,
+                                   priv->gca_buffer_changed_handler);
+      priv->gca_buffer_changed_handler = 0;
+    }
+
+  EXIT;
+}
diff --git a/src/editor/gb-editor-code-assistant.h b/src/editor/gb-editor-code-assistant.h
new file mode 100644
index 0000000..aa65e5e
--- /dev/null
+++ b/src/editor/gb-editor-code-assistant.h
@@ -0,0 +1,31 @@
+/* gb-editor-code-assistant.h
+ *
+ * Copyright (C) 2014 Christian Hergert <christian hergert me>
+ *
+ * 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 GB_EDITOR_CODE_ASSISTANT_H
+#define GB_EDITOR_CODE_ASSISTANT_H
+
+#include "gb-editor-tab.h"
+
+G_BEGIN_DECLS
+
+void gb_editor_code_assistant_init    (GbEditorTab *editor_tab);
+void gb_editor_code_assistant_destroy (GbEditorTab *editor_tab);
+
+G_END_DECLS
+
+#endif /* GB_EDITOR_CODE_ASSISTANT_H */
diff --git a/src/editor/gb-editor-tab-private.h b/src/editor/gb-editor-tab-private.h
index 2854b3e..65ce8fa 100644
--- a/src/editor/gb-editor-tab-private.h
+++ b/src/editor/gb-editor-tab-private.h
@@ -31,6 +31,7 @@
 #include "gb-source-change-monitor.h"
 #include "gb-source-search-highlighter.h"
 #include "gb-source-view.h"
+#include "gca-service.h"
 #include "gd-tagged-entry.h"
 #include "nautilus-floating-bar.h"
 
@@ -101,6 +102,12 @@ struct _GbEditorTabPrivate
   GtkSourceFile *file;
 
   /*
+   * Code Assistance.
+   */
+  GcaService *gca_service;
+  gulong      gca_buffer_changed_handler;
+
+  /*
    * Animation for save progress.
    */
   GbAnimation *save_animation;
diff --git a/src/editor/gb-editor-tab.c b/src/editor/gb-editor-tab.c
index 0947f04..c6541ee 100644
--- a/src/editor/gb-editor-tab.c
+++ b/src/editor/gb-editor-tab.c
@@ -21,6 +21,7 @@
 #include <glib/gi18n.h>
 #include <gtksourceview/completion-providers/words/gtksourcecompletionwords.h>
 
+#include "gb-editor-code-assistant.h"
 #include "gb-editor-file-mark.h"
 #include "gb-editor-file-marks.h"
 #include "gb-editor-tab.h"
@@ -433,6 +434,23 @@ gb_editor_tab_cursor_moved (GbEditorTab      *tab,
 }
 
 static void
+gb_editor_tab_language_changed (GbEditorTab     *tab,
+                                GParamSpec      *pspec,
+                                GtkSourceBuffer *buffer)
+{
+  GtkSourceLanguage *language;
+
+  g_return_if_fail (GB_IS_EDITOR_TAB (tab));
+  g_return_if_fail (GTK_SOURCE_IS_BUFFER (buffer));
+
+  language = gtk_source_buffer_get_language (buffer);
+
+  gb_editor_code_assistant_destroy (tab);
+  if (language)
+    gb_editor_code_assistant_init (tab);
+}
+
+static void
 gb_editor_tab_modified_changed (GbEditorTab   *tab,
                                 GtkTextBuffer *buffer)
 {
@@ -1054,6 +1072,8 @@ transform_file_to_language (GBinding     *binding,
       language = gtk_source_language_manager_guess_language (manager, filename,
                                                              content_type);
 
+      gb_editor_code_assistant_destroy (tab);
+
       /* TODO: This shouldn't be set here, this function shouldn't have
        *       side effects. But easy to plumb it until we clean this up.
        */
@@ -1066,6 +1086,9 @@ transform_file_to_language (GBinding     *binding,
           settings = gb_editor_settings_new_for_language (lang_id);
           gb_editor_tab_set_settings (tab, settings);
           g_object_unref (settings);
+
+          
+          gb_editor_code_assistant_init (tab);
         }
 
       g_free (filename);
@@ -1170,6 +1193,10 @@ gb_editor_tab_constructed (GObject *object)
 
 
   g_signal_connect_swapped (priv->document,
+                            "notify::language",
+                            G_CALLBACK (gb_editor_tab_language_changed),
+                            tab);
+  g_signal_connect_swapped (priv->document,
                             "modified-changed",
                             G_CALLBACK (gb_editor_tab_modified_changed),
                             tab);
@@ -1408,10 +1435,11 @@ gb_editor_tab_dispose (GObject *object)
 
   g_assert (GB_IS_EDITOR_TAB (tab));
 
+  gb_editor_code_assistant_destroy (tab);
+
   gb_editor_tab_disconnect_settings (tab);
 
   g_clear_object (&tab->priv->change_monitor);
-  g_clear_object (&tab->priv->document);
   g_clear_object (&tab->priv->search_entry_tag);
   g_clear_object (&tab->priv->file);
   g_clear_object (&tab->priv->search_highlighter);
@@ -1419,6 +1447,7 @@ gb_editor_tab_dispose (GObject *object)
   g_clear_object (&tab->priv->search_context);
   g_clear_object (&tab->priv->settings);
   g_clear_object (&tab->priv->words_provider);
+  g_clear_object (&tab->priv->document);
 
   G_OBJECT_CLASS (gb_editor_tab_parent_class)->dispose (object);
 
diff --git a/src/gnome-builder.mk b/src/gnome-builder.mk
index 166db51..32dde7c 100644
--- a/src/gnome-builder.mk
+++ b/src/gnome-builder.mk
@@ -15,8 +15,6 @@ libgnome_builder_la_SOURCES = \
        src/auto-indent/gb-source-auto-indenter-c.h \
        src/auto-indent/gb-source-auto-indenter-xml.c \
        src/auto-indent/gb-source-auto-indenter-xml.h \
-       src/code-assistant/gb-source-code-assistant.c \
-       src/code-assistant/gb-source-code-assistant.h \
        src/commands/gb-command.c \
        src/commands/gb-command.h \
        src/commands/gb-command-bar.c \
@@ -43,6 +41,8 @@ libgnome_builder_la_SOURCES = \
        src/devhelp/gb-devhelp-workspace.h \
        src/editor/c-parse-helper.c \
        src/editor/c-parse-helper.h \
+       src/editor/gb-editor-code-assistant.c \
+       src/editor/gb-editor-code-assistant.h \
        src/editor/gb-editor-commands.c \
        src/editor/gb-editor-commands.h \
        src/editor/gb-editor-document.c \
@@ -181,7 +181,6 @@ libgnome_builder_la_CFLAGS = \
        -I$(top_srcdir)/src/animation \
        -I$(top_srcdir)/src/app \
        -I$(top_srcdir)/src/auto-indent \
-       -I$(top_srcdir)/src/code-assistant \
        -I$(top_srcdir)/src/commands \
        -I$(top_srcdir)/src/devhelp \
        -I$(top_srcdir)/src/editor \