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[gnome-builder/wip/chergert/perspective] libide: implement ide_workbench_open_* variants

commit 86395bd332d214a20bc1550104a440861e4731c4
Author: Christian Hergert <christian hergert me>
Date:   Sun Nov 15 15:39:22 2015 -0800

    libide: implement ide_workbench_open_* variants
    
    Keeping these in their own file since it's a rather large set of work on
    its own. It also keeps all of this similar stuff together in one place.

 libide/Makefile.am          |    1 +
 libide/ide-workbench-open.c |  300 +++++++++++++++++++++++++++++++++++++++++++
 libide/ide-workbench.c      |   15 --
 libide/ide-workbench.h      |   15 ++-
 4 files changed, 313 insertions(+), 18 deletions(-)
---
diff --git a/libide/Makefile.am b/libide/Makefile.am
index e1e830a..c4e62f1 100644
--- a/libide/Makefile.am
+++ b/libide/Makefile.am
@@ -211,6 +211,7 @@ libide_1_0_la_public_sources = \
        ide-workbench-addin.h \
        ide-workbench-header-bar.c \
        ide-workbench-header-bar.h \
+       ide-workbench-open.c \
        ide-worker.c \
        ide-worker.h \
        ide.c \
diff --git a/libide/ide-workbench-open.c b/libide/ide-workbench-open.c
new file mode 100644
index 0000000..d02522f
--- /dev/null
+++ b/libide/ide-workbench-open.c
@@ -0,0 +1,300 @@
+/* ide-workbench-open.c
+ *
+ * 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/>.
+ */
+
+#include <libpeas/peas.h>
+
+#include "ide-uri.h"
+#include "ide-workbench.h"
+#include "ide-workbench-addin.h"
+#include "ide-workbench-private.h"
+
+typedef struct
+{
+  IdeWorkbenchAddin *addin;
+  gint               priority;
+} IdeWorkbenchLoader;
+
+typedef struct
+{
+  GTask  *task;
+  IdeUri *uri;
+  GArray *loaders;
+  gchar  *content_type;
+} IdeWorkbenchOpenUriState;
+
+typedef struct
+{
+  gint          ref_count;
+  IdeWorkbench *self;
+  GTask        *task;
+  GString      *error_msg;
+} IdeWorkbenchOpenFilesState;
+
+static void ide_workbench_open_uri_try_next (IdeWorkbenchOpenUriState *open_uri_state);
+
+static void
+ide_workbench_collect_loaders (PeasExtensionSet *set,
+                               PeasPluginInfo   *plugin_info,
+                               PeasExtension    *extension,
+                               gpointer          user_data)
+{
+  IdeWorkbenchAddin *addin = (IdeWorkbenchAddin *)extension;
+  IdeWorkbenchOpenUriState *open_uri_state = user_data;
+  IdeWorkbenchLoader loader;
+  gint priority = 0;
+
+  g_assert (PEAS_IS_EXTENSION_SET (set));
+  g_assert (plugin_info != NULL);
+  g_assert (IDE_IS_WORKBENCH_ADDIN (addin));
+
+  if (ide_workbench_addin_can_open (addin,
+                                    open_uri_state->uri,
+                                    open_uri_state->content_type,
+                                    &priority))
+    {
+      loader.addin = g_object_ref (addin);
+      loader.priority = priority;
+      g_array_append_val (open_uri_state->loaders, loader);
+    }
+}
+
+static gint
+ide_workbench_loader_compare (gconstpointer a,
+                              gconstpointer b)
+{
+  const IdeWorkbenchLoader *loadera = a;
+  const IdeWorkbenchLoader *loaderb = b;
+
+  return loadera->priority - loaderb->priority;
+}
+
+static void
+ide_workbench_loader_destroy (gpointer data)
+{
+  IdeWorkbenchLoader *loader = data;
+
+  g_clear_object (&loader->addin);
+  loader->priority = 0;
+}
+
+static void
+ide_workbench_open_uri_state_free (gpointer data)
+{
+  IdeWorkbenchOpenUriState *open_uri_state = data;
+
+  g_clear_pointer (&open_uri_state->loaders, g_array_unref);
+  g_clear_pointer (&open_uri_state->uri, ide_uri_unref);
+  g_clear_pointer (&open_uri_state->content_type, g_free);
+  g_free (open_uri_state);
+}
+
+static void
+ide_workbench_open_uri_cb (GObject      *object,
+                           GAsyncResult *result,
+                           gpointer      user_data)
+{
+  IdeWorkbenchAddin *addin = (IdeWorkbenchAddin *)object;
+  IdeWorkbenchOpenUriState *open_uri_state = user_data;
+  GError *error = NULL;
+
+  g_assert (IDE_IS_WORKBENCH_ADDIN (addin));
+  g_assert (open_uri_state != NULL);
+
+  if (ide_workbench_addin_open_finish (addin, result, &error))
+    {
+      g_task_return_boolean (open_uri_state->task, TRUE);
+      g_object_unref (open_uri_state->task);
+      return;
+    }
+
+  ide_workbench_open_uri_try_next (open_uri_state);
+}
+
+static void
+ide_workbench_open_uri_try_next (IdeWorkbenchOpenUriState *open_uri_state)
+{
+  IdeWorkbenchLoader *loader;
+
+  g_assert (open_uri_state != NULL);
+  g_assert (G_IS_TASK (open_uri_state->task));
+  g_assert (open_uri_state->loaders != NULL);
+  g_assert (open_uri_state->uri != NULL);
+
+  if (open_uri_state->loaders->len == 0)
+    {
+      gchar *uristr;
+
+      uristr = ide_uri_to_string (open_uri_state->uri, IDE_URI_HIDE_AUTH_PARAMS);
+      g_task_return_new_error (open_uri_state->task,
+                               G_IO_ERROR,
+                               G_IO_ERROR_NOT_SUPPORTED,
+                               "No handler responded to %s",
+                               uristr);
+
+      g_clear_object (&open_uri_state->task);
+      g_free (uristr);
+
+      return;
+    }
+
+  loader = &g_array_index (open_uri_state->loaders, IdeWorkbenchLoader, 0);
+
+  ide_workbench_addin_open_async (loader->addin,
+                                  open_uri_state->uri,
+                                  open_uri_state->content_type,
+                                  g_task_get_cancellable (open_uri_state->task),
+                                  ide_workbench_open_uri_cb,
+                                  open_uri_state);
+}
+
+void
+ide_workbench_open_uri_async (IdeWorkbench        *self,
+                              IdeUri              *uri,
+                              GCancellable        *cancellable,
+                              GAsyncReadyCallback  callback,
+                              gpointer             user_data)
+{
+  IdeWorkbenchOpenUriState *open_uri_state;
+
+  g_return_if_fail (IDE_IS_WORKBENCH (self));
+  g_return_if_fail (uri != NULL);
+  g_return_if_fail (!cancellable || G_IS_CANCELLABLE (cancellable));
+
+  open_uri_state = g_new0 (IdeWorkbenchOpenUriState, 1);
+  open_uri_state->uri = ide_uri_ref (uri);
+  open_uri_state->loaders = g_array_new (FALSE, FALSE, sizeof (IdeWorkbenchLoader));
+  open_uri_state->task = g_task_new (self, cancellable, callback, user_data);
+  g_array_set_clear_func (open_uri_state->loaders, ide_workbench_loader_destroy);
+  peas_extension_set_foreach (self->addins, ide_workbench_collect_loaders, open_uri_state);
+  g_array_sort (open_uri_state->loaders, ide_workbench_loader_compare);
+  g_task_set_task_data (open_uri_state->task, open_uri_state, ide_workbench_open_uri_state_free);
+
+  ide_workbench_open_uri_try_next (open_uri_state);
+}
+
+gboolean
+ide_workbench_open_uri_finish (IdeWorkbench  *self,
+                               GAsyncResult  *result,
+                               GError       **error)
+{
+  g_return_val_if_fail (IDE_IS_WORKBENCH (self), FALSE);
+  g_return_val_if_fail (G_IS_TASK (result), FALSE);
+
+  return g_task_propagate_boolean (G_TASK (result), error);
+}
+
+static void
+ide_workbench_open_files_cb (GObject      *object,
+                             GAsyncResult *result,
+                             gpointer      user_data)
+{
+  IdeWorkbench *self = (IdeWorkbench *)object;
+  IdeWorkbenchOpenFilesState *open_files_state = user_data;
+  GError *error = NULL;
+
+  g_assert (IDE_IS_WORKBENCH (self));
+  g_assert (open_files_state->self == self);
+  g_assert (open_files_state->ref_count > 0);
+  g_assert (open_files_state->error_msg != NULL);
+  g_assert (G_IS_TASK (open_files_state->task));
+
+  if (!ide_workbench_open_uri_finish (self, result, &error))
+    {
+      g_string_append (open_files_state->error_msg, error->message);
+      g_clear_error (&error);
+    }
+
+  open_files_state->ref_count--;
+
+  if (open_files_state->ref_count == 0)
+    {
+      if (open_files_state->error_msg->len > 0)
+        g_task_return_new_error (open_files_state->task,
+                                 G_IO_ERROR,
+                                 G_IO_ERROR_FAILED,
+                                 "%s",
+                                 open_files_state->error_msg->str);
+      else
+        g_task_return_boolean (open_files_state->task, TRUE);
+
+      g_string_free (open_files_state->error_msg, TRUE);
+      g_clear_object (&open_files_state->task);
+      g_free (open_files_state);
+    }
+}
+
+void
+ide_workbench_open_files_async (IdeWorkbench         *self,
+                                GFile               **files,
+                                guint                 n_files,
+                                GCancellable         *cancellable,
+                                GAsyncReadyCallback   callback,
+                                gpointer              user_data)
+{
+  IdeWorkbenchOpenFilesState *open_files_state;
+  gint i;
+
+  g_return_if_fail (IDE_IS_WORKBENCH (self));
+  g_return_if_fail ((n_files > 0 && files != NULL) || (n_files == 0));
+  g_return_if_fail (!cancellable || G_IS_CANCELLABLE (cancellable));
+
+  if (n_files == 0)
+    {
+      GTask *task;
+
+      task = g_task_new (self, cancellable, callback, user_data);
+      g_task_return_boolean (task, TRUE);
+      g_object_unref (task);
+
+      return;
+    }
+
+  open_files_state = g_new0 (IdeWorkbenchOpenFilesState, 1);
+  open_files_state->ref_count = n_files;
+  open_files_state->self = self;
+  open_files_state->task = g_task_new (self, cancellable, callback, user_data);
+  open_files_state->error_msg = g_string_new (NULL);
+
+  g_assert (n_files > 0);
+
+  for (i = 0; i < n_files; i++)
+    {
+      IdeUri *uri;
+
+      uri = ide_uri_new_from_file (files [i]);
+      ide_workbench_open_uri_async (self,
+                                    uri,
+                                    cancellable,
+                                    ide_workbench_open_files_cb,
+                                    open_files_state);
+      ide_uri_unref (uri);
+    }
+}
+
+gboolean
+ide_workbench_open_files_finish (IdeWorkbench  *self,
+                                 GAsyncResult  *result,
+                                 GError       **error)
+{
+  GTask *task = (GTask *)result;
+
+  g_return_val_if_fail (IDE_IS_WORKBENCH (self), FALSE);
+  g_return_val_if_fail (G_IS_TASK (task), FALSE);
+
+  return g_task_propagate_boolean (task, error);
+}
diff --git a/libide/ide-workbench.c b/libide/ide-workbench.c
index f2a0d31..42bf745 100644
--- a/libide/ide-workbench.c
+++ b/libide/ide-workbench.c
@@ -546,18 +546,3 @@ ide_workbench_set_visible_perspective_name (IdeWorkbench *self,
   if (perspective != NULL)
     ide_workbench_set_visible_perspective (self, perspective);
 }
-
-void
-ide_workbench_open_async (IdeWorkbench         *self,
-                          GFile               **files,
-                          gint                  n_files,
-                          GCancellable         *cancellable,
-                          GAsyncReadyCallback   callback,
-                          gpointer              user_data)
-{
-  g_return_if_fail (IDE_IS_WORKBENCH (self));
-  g_return_if_fail (n_files > 0);
-  g_return_if_fail (!cancellable || G_IS_CANCELLABLE (cancellable));
-
-  /* TODO */
-}
diff --git a/libide/ide-workbench.h b/libide/ide-workbench.h
index 007afe6..f75d1ab 100644
--- a/libide/ide-workbench.h
+++ b/libide/ide-workbench.h
@@ -23,6 +23,7 @@
 
 #include "ide-context.h"
 #include "ide-perspective.h"
+#include "ide-uri.h"
 
 G_BEGIN_DECLS
 
@@ -30,13 +31,21 @@ G_BEGIN_DECLS
 
 G_DECLARE_FINAL_TYPE (IdeWorkbench, ide_workbench, IDE, WORKBENCH, GtkApplicationWindow)
 
-void            ide_workbench_open_async                   (IdeWorkbench         *self,
+void            ide_workbench_open_uri_async               (IdeWorkbench         *self,
+                                                            IdeUri               *uri,
+                                                            GCancellable         *cancellable,
+                                                            GAsyncReadyCallback   callback,
+                                                            gpointer              user_data);
+gboolean        ide_workbench_open_uri_finish              (IdeWorkbench         *self,
+                                                            GAsyncResult         *result,
+                                                            GError              **error);
+void            ide_workbench_open_files_async             (IdeWorkbench         *self,
                                                             GFile               **files,
-                                                            gint                  n_files,
+                                                            guint                 n_files,
                                                             GCancellable         *cancellable,
                                                             GAsyncReadyCallback   callback,
                                                             gpointer              user_data);
-gboolean        ide_workbench_open_finish                  (IdeWorkbench         *self,
+gboolean        ide_workbench_open_files_finish            (IdeWorkbench         *self,
                                                             GAsyncResult         *result,
                                                             GError              **error);
 void            ide_workbench_save_all_async               (IdeWorkbench         *self,
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