[gnome-builder] code-index: Implementing symbol resolver

[Christian Hergert <chergert src gnome org>]

commit 8056ad53dfcf44207eab65a74dd2d132efa6cbd2
Author: Anoop Chandu <anoopchandu96 gmail com>
Date:   Sat Aug 26 20:09:38 2017 +0530

    code-index: Implementing symbol resolver
    
    IdeCodeIndexSymbolResolver implements symbol resolver. This
    resolver will find definition of a reference using index of
    symbols and return location of that definition.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=786700

 .../code-index/ide-code-index-symbol-resolver.c    |  145 ++++++++++++++++++++
 .../code-index/ide-code-index-symbol-resolver.h    |   33 +++++
 2 files changed, 178 insertions(+), 0 deletions(-)
---
diff --git a/plugins/code-index/ide-code-index-symbol-resolver.c 
b/plugins/code-index/ide-code-index-symbol-resolver.c
new file mode 100644
index 0000000..9f6212b
--- /dev/null
+++ b/plugins/code-index/ide-code-index-symbol-resolver.c
@@ -0,0 +1,145 @@
+/* ide-code-index-symbol-resolver.c
+ *
+ * Copyright (C) 2017 Anoop Chandu <anoopchandu96 gmail com>
+ *
+ * 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-index-symbol-resolver"
+
+#include "ide-code-index-service.h"
+#include "ide-code-index-symbol-resolver.h"
+
+struct _IdeCodeIndexSymbolResolver
+{
+  IdeObject parent_instance;
+};
+
+static void symbol_resolver_iface_init (IdeSymbolResolverInterface *iface);
+
+G_DEFINE_TYPE_EXTENDED (IdeCodeIndexSymbolResolver, ide_code_index_symbol_resolver, IDE_TYPE_OBJECT, 0,
+                        G_IMPLEMENT_INTERFACE (IDE_TYPE_SYMBOL_RESOLVER, symbol_resolver_iface_init))
+
+static void
+ide_code_index_symbol_resolver_lookup_cb (GObject      *object,
+                                          GAsyncResult *result,
+                                          gpointer      user_data)
+{
+  IdeCodeIndexSymbolResolver *self;
+  IdeCodeIndexer *code_indexer = (IdeCodeIndexer *)object;
+  g_autofree gchar *key = NULL;
+  IdeContext *context;
+  IdeCodeIndexService *service;
+  IdeCodeIndexIndex *index;
+  g_autoptr(IdeSymbol) symbol = NULL;
+  g_autoptr(GError) error = NULL;
+  g_autoptr(GTask) task = user_data;
+
+  g_assert (IDE_IS_CODE_INDEXER (code_indexer));
+  g_assert (G_IS_TASK (task));
+
+  self = g_task_get_source_object (task);
+
+  key = ide_code_indexer_generate_key_finish (code_indexer, result, &error);
+
+  if (key == NULL)
+    {
+      g_message ("Key not found, %s", error->message);
+      g_task_return_error (task, g_steal_pointer (&error));
+      return;
+    }
+
+  context = ide_object_get_context (IDE_OBJECT (self));
+  service = ide_context_get_service_typed (context, IDE_TYPE_CODE_INDEX_SERVICE);
+  index = ide_code_index_service_get_index (service);
+
+  if (NULL != (symbol = ide_code_index_index_lookup_symbol (index, key)))
+    {
+      g_task_return_pointer (task, g_steal_pointer (&symbol), (GDestroyNotify)ide_symbol_unref);
+    }
+  else
+    {
+      g_task_return_new_error (task,
+                               G_IO_ERROR,
+                               G_IO_ERROR_NOT_FOUND,
+                               "Symbol with key:%s not found",
+                               key);
+    }
+}
+
+static void
+ide_code_index_symbol_resolver_lookup_symbol_async (IdeSymbolResolver   *resolver,
+                                                    IdeSourceLocation   *location,
+                                                    GCancellable        *cancellable,
+                                                    GAsyncReadyCallback  callback,
+                                                    gpointer             user_data)
+{
+  IdeCodeIndexSymbolResolver *self = (IdeCodeIndexSymbolResolver *)resolver;
+  IdeContext *context;
+  IdeCodeIndexService *service;
+  IdeCodeIndexer *code_indexer;
+  const gchar *file_name = NULL;
+  g_autoptr(GTask) task = NULL;
+
+  g_return_if_fail (IDE_IS_CODE_INDEX_SYMBOL_RESOLVER (self));
+  g_return_if_fail (location != NULL);
+  g_return_if_fail (!cancellable || G_IS_CANCELLABLE (cancellable));
+
+  context = ide_object_get_context (IDE_OBJECT (self));
+  service = ide_context_get_service_typed (context, IDE_TYPE_CODE_INDEX_SERVICE);
+
+  file_name = ide_file_get_path (ide_source_location_get_file (location));
+  code_indexer = ide_code_index_service_get_code_indexer (service, file_name);
+
+  task = g_task_new (self, cancellable, callback, user_data);
+
+  if (g_task_return_error_if_cancelled (task))
+    return;
+
+  g_debug ("Getting key");
+
+  ide_code_indexer_generate_key_async (code_indexer,
+                                       location,
+                                       cancellable,
+                                       ide_code_index_symbol_resolver_lookup_cb,
+                                       g_steal_pointer (&task));
+}
+static IdeSymbol *
+ide_code_index_symbol_resolver_lookup_symbol_finish (IdeSymbolResolver  *resolver,
+                                                     GAsyncResult       *result,
+                                                     GError            **error)
+{
+  GTask *task = (GTask *)result;
+
+  g_return_val_if_fail (G_IS_TASK (task), NULL);
+
+  return g_task_propagate_pointer (task, error);
+}
+
+static void
+symbol_resolver_iface_init (IdeSymbolResolverInterface *iface)
+{
+  iface->lookup_symbol_async = ide_code_index_symbol_resolver_lookup_symbol_async;
+  iface->lookup_symbol_finish = ide_code_index_symbol_resolver_lookup_symbol_finish;
+}
+
+static void
+ide_code_index_symbol_resolver_init (IdeCodeIndexSymbolResolver *self)
+{
+}
+
+static void
+ide_code_index_symbol_resolver_class_init (IdeCodeIndexSymbolResolverClass *self)
+{
+}
diff --git a/plugins/code-index/ide-code-index-symbol-resolver.h 
b/plugins/code-index/ide-code-index-symbol-resolver.h
new file mode 100644
index 0000000..efa3e15
--- /dev/null
+++ b/plugins/code-index/ide-code-index-symbol-resolver.h
@@ -0,0 +1,33 @@
+/* ide-code-index-symbol-resolver.h
+ *
+ * Copyright (C) 2017 Anoop Chandu <anoopchandu96 gmail com>
+ *
+ * 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_CODE_INDEX_SYMBOL_RESOLVER_H
+#define IDE_CODE_INDEX_SYMBOL_RESOLVER_H
+
+#include <ide.h>
+
+G_BEGIN_DECLS
+
+#define IDE_TYPE_CODE_INDEX_SYMBOL_RESOLVER (ide_code_index_symbol_resolver_get_type())
+
+G_DECLARE_FINAL_TYPE (IdeCodeIndexSymbolResolver, ide_code_index_symbol_resolver, IDE, 
CODE_INDEX_SYMBOL_RESOLVER, IdeObject)
+
+G_END_DECLS
+
+#endif /* IDE_CODE_INDEX_SYMBOL_RESOLVER_H */