[gnome-builder/gnome-builder-3-18] vala: start on a simple vala symbol resolver

[Christian Hergert <chergert src gnome org>]

commit 5e118dbef54725e35ddecbb9c0341e5fca92a8a8
Author: Christian Hergert <christian hergert me>
Date:   Sat Sep 26 01:29:42 2015 -0700

    vala: start on a simple vala symbol resolver

 plugins/vala-pack/Makefile.am                   |    1 +
 plugins/vala-pack/ide-vala-symbol-resolver.vala |   67 +++++++++++++++++++++++
 plugins/vala-pack/vala-pack.plugin              |    2 +
 3 files changed, 70 insertions(+), 0 deletions(-)
---
diff --git a/plugins/vala-pack/Makefile.am b/plugins/vala-pack/Makefile.am
index 439e928..f83fccc 100644
--- a/plugins/vala-pack/Makefile.am
+++ b/plugins/vala-pack/Makefile.am
@@ -17,6 +17,7 @@ libvala_pack_plugin_la_SOURCES = \
        ide-vala-index.vala \
        ide-vala-locator.vala \
        ide-vala-source-file.vala \
+       ide-vala-symbol-resolver.vala \
        vala-pack-plugin.vala \
        $(NULL)
 
diff --git a/plugins/vala-pack/ide-vala-symbol-resolver.vala b/plugins/vala-pack/ide-vala-symbol-resolver.vala
new file mode 100644
index 0000000..8c740ef
--- /dev/null
+++ b/plugins/vala-pack/ide-vala-symbol-resolver.vala
@@ -0,0 +1,67 @@
+/* ide-vala-symbol-resolver.vala
+ *
+ * Copyright (C) 2015 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/>.
+ */
+
+using GLib;
+using Ide;
+using Vala;
+
+namespace Ide
+{
+       public class ValaSymbolResolver: Ide.Object, Ide.SymbolResolver
+       {
+               public async Ide.SymbolTree? get_symbol_tree_async (GLib.File file,
+                                                                   GLib.Cancellable? cancellable)
+                       throws GLib.Error
+               {
+                       return null;
+               }
+
+               public async Ide.Symbol? lookup_symbol_async (Ide.SourceLocation location,
+                                                             GLib.Cancellable? cancellable)
+                       throws GLib.Error
+               {
+                       Vala.Symbol? symbol = null;
+
+                       var context = this.get_context ();
+                       var service = (Ide.ValaService)context.get_service_typed (typeof (Ide.ValaService));
+                       var index = service.index;
+                       var file = location.get_file ();
+                       var line = (int)location.get_line () + 1;
+                       var column = (int)location.get_line_offset () + 1;
+
+                       symbol = yield index.find_symbol_at (file.get_file (), line, column);
+
+                       if (symbol != null) {
+                               var kind = Ide.SymbolKind.FUNCTION;
+                               var flags = Ide.SymbolFlags.SYMBOL_FLAGS_NONE;
+                               var source_reference = symbol.source_reference;
+
+                               if (source_reference != null) {
+                                       var loc = new Ide.SourceLocation (file,
+                                                                         source_reference.begin.line - 1,
+                                                                         source_reference.begin.column - 1,
+                                                                         0);
+                                       return new Ide.Symbol (symbol.name, kind, flags, loc, loc, loc);
+                               }
+                       }
+
+                       return null;
+               }
+       }
+}
+
diff --git a/plugins/vala-pack/vala-pack.plugin b/plugins/vala-pack/vala-pack.plugin
index 50f1cf6..9bb3a62 100644
--- a/plugins/vala-pack/vala-pack.plugin
+++ b/plugins/vala-pack/vala-pack.plugin
@@ -10,3 +10,5 @@ X-Completion-Provider-Languages=vala
 X-Diagnostic-Provider-Languages=vala
 X-Indenter-Languages=vala
 X-Indenter-Languages-Priority=0
+X-Symbol-Resolver-Languages=vala
+X-Symbol-Resolver-Languages-Priority=100