[gnome-builder/wip/gtk4-port] libide/projects: add IdeTemplateLocator

[Christian Hergert <chergert src gnome org>]

commit e34e6f9eb703c90f2535ab902228cb10c7e70224
Author: Christian Hergert <chergert redhat com>
Date:   Thu May 26 14:54:47 2022 -0700

    libide/projects: add IdeTemplateLocator
    
    The goal of this is to remove more code from some template plugins.

 src/libide/projects/ide-template-locator.c | 179 +++++++++++++++++++++++++++++
 src/libide/projects/ide-template-locator.h |  51 ++++++++
 src/libide/projects/libide-projects.h      |   1 +
 src/libide/projects/meson.build            |   2 +
 4 files changed, 233 insertions(+)
---
diff --git a/src/libide/projects/ide-template-locator.c b/src/libide/projects/ide-template-locator.c
new file mode 100644
index 000000000..18d5d1c61
--- /dev/null
+++ b/src/libide/projects/ide-template-locator.c
@@ -0,0 +1,179 @@
+/* ide-template-locator.c
+ *
+ * Copyright 2022 Christian Hergert <chergert redhat 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/>.
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */
+
+#define G_LOG_DOMAIN "ide-template-locator"
+
+#include "config.h"
+
+#include <gtksourceview/gtksource.h>
+
+#include <libide-code.h>
+
+#include "ide-template-locator.h"
+
+typedef struct
+{
+  char *license_text;
+} IdeTemplateLocatorPrivate;
+
+G_DEFINE_TYPE_WITH_PRIVATE (IdeTemplateLocator, ide_template_locator, TMPL_TYPE_TEMPLATE_LOCATOR)
+
+enum {
+  PROP_0,
+  PROP_LICENSE_TEXT,
+  N_PROPS
+};
+
+static GParamSpec *properties [N_PROPS];
+
+static GInputStream *
+ide_template_locator_locate (TmplTemplateLocator  *locator,
+                             const char           *path,
+                             GError              **error)
+{
+  IdeTemplateLocator *self = (IdeTemplateLocator *)locator;
+  IdeTemplateLocatorPrivate *priv = ide_template_locator_get_instance_private (self);
+
+  g_assert (IDE_IS_TEMPLATE_LOCATOR (self));
+  g_assert (path != NULL);
+
+  if (g_str_has_prefix (path, "license."))
+    {
+      GtkSourceLanguageManager *manager = gtk_source_language_manager_get_default ();
+      GtkSourceLanguage *language = gtk_source_language_manager_guess_language (manager, path, NULL);
+
+      if (priv->license_text != NULL && language != NULL)
+        {
+          g_autofree char *header = ide_language_format_header (language, priv->license_text);
+          gsize len = strlen (header);
+
+          return g_memory_input_stream_new_from_data (g_steal_pointer (&header), len, g_free);
+        }
+
+      /* We don't want to fail here just because we didn't have any
+       * license text to expand into a header.
+       */
+      return g_memory_input_stream_new ();
+    }
+
+  return TMPL_TEMPLATE_LOCATOR_CLASS (ide_template_locator_parent_class)->locate (locator, path, error);
+}
+
+static void
+ide_template_locator_dispose (GObject *object)
+{
+  IdeTemplateLocator *self = (IdeTemplateLocator *)object;
+  IdeTemplateLocatorPrivate *priv = ide_template_locator_get_instance_private (self);
+
+  g_clear_pointer (&priv->license_text, g_free);
+
+  G_OBJECT_CLASS (ide_template_locator_parent_class)->dispose (object);
+}
+
+static void
+ide_template_locator_get_property (GObject    *object,
+                                   guint       prop_id,
+                                   GValue     *value,
+                                   GParamSpec *pspec)
+{
+  IdeTemplateLocator *self = IDE_TEMPLATE_LOCATOR (object);
+
+  switch (prop_id)
+    {
+    case PROP_LICENSE_TEXT:
+      g_value_set_string (value, ide_template_locator_get_license_text (self));
+      break;
+
+    default:
+      G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
+    }
+}
+
+static void
+ide_template_locator_set_property (GObject      *object,
+                                   guint         prop_id,
+                                   const GValue *value,
+                                   GParamSpec   *pspec)
+{
+  IdeTemplateLocator *self = IDE_TEMPLATE_LOCATOR (object);
+
+  switch (prop_id)
+    {
+    case PROP_LICENSE_TEXT:
+      ide_template_locator_set_license_text (self, g_value_get_string (value));
+      break;
+
+    default:
+      G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
+    }
+}
+
+static void
+ide_template_locator_class_init (IdeTemplateLocatorClass *klass)
+{
+  TmplTemplateLocatorClass *locator_class = TMPL_TEMPLATE_LOCATOR_CLASS (klass);
+  GObjectClass *object_class = G_OBJECT_CLASS (klass);
+
+  object_class->dispose = ide_template_locator_dispose;
+  object_class->get_property = ide_template_locator_get_property;
+  object_class->set_property = ide_template_locator_set_property;
+
+  locator_class->locate = ide_template_locator_locate;
+
+  properties [PROP_LICENSE_TEXT] =
+    g_param_spec_string ("license-text",
+                         "License Text",
+                         "The text of the license to include in headers",
+                         NULL,
+                         (G_PARAM_READWRITE | G_PARAM_EXPLICIT_NOTIFY | G_PARAM_STATIC_STRINGS));
+
+  g_object_class_install_properties (object_class, N_PROPS, properties);
+}
+
+static void
+ide_template_locator_init (IdeTemplateLocator *self)
+{
+}
+
+const char *
+ide_template_locator_get_license_text (IdeTemplateLocator *self)
+{
+  IdeTemplateLocatorPrivate *priv = ide_template_locator_get_instance_private (self);
+
+  g_return_val_if_fail (IDE_IS_TEMPLATE_LOCATOR (self), NULL);
+
+  return priv->license_text;
+}
+
+void
+ide_template_locator_set_license_text (IdeTemplateLocator *self,
+                                       const char         *license_text)
+{
+  IdeTemplateLocatorPrivate *priv = ide_template_locator_get_instance_private (self);
+
+  g_return_if_fail (IDE_IS_TEMPLATE_LOCATOR (self));
+
+  if (g_strcmp0 (license_text, priv->license_text) != 0)
+    {
+      g_free (priv->license_text);
+      priv->license_text = g_strdup (license_text);
+      g_object_notify_by_pspec (G_OBJECT (self), properties [PROP_LICENSE_TEXT]);
+    }
+}
diff --git a/src/libide/projects/ide-template-locator.h b/src/libide/projects/ide-template-locator.h
new file mode 100644
index 000000000..5394a10fa
--- /dev/null
+++ b/src/libide/projects/ide-template-locator.h
@@ -0,0 +1,51 @@
+/* ide-template-locator.h
+ *
+ * Copyright 2022 Christian Hergert <chergert redhat 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/>.
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */
+
+#pragma once
+
+#if !defined (IDE_PROJECTS_INSIDE) && !defined (IDE_PROJECTS_COMPILATION)
+# error "Only <libide-projects.h> can be included directly."
+#endif
+
+#include <tmpl-glib.h>
+
+#include <libide-core.h>
+
+G_BEGIN_DECLS
+
+#define IDE_TYPE_TEMPLATE_LOCATOR (ide_template_locator_get_type())
+
+IDE_AVAILABLE_IN_ALL
+G_DECLARE_DERIVABLE_TYPE (IdeTemplateLocator, ide_template_locator, IDE, TEMPLATE_LOCATOR, 
TmplTemplateLocator)
+
+struct _IdeTemplateLocatorClass
+{
+  TmplTemplateLocatorClass parent_class;
+};
+
+IDE_AVAILABLE_IN_ALL
+IdeTemplateLocator *ide_template_locator_new              (void);
+IDE_AVAILABLE_IN_ALL
+const char         *ide_template_locator_get_license_text (IdeTemplateLocator *self);
+IDE_AVAILABLE_IN_ALL
+void                ide_template_locator_set_license_text (IdeTemplateLocator *self,
+                                                           const char         *license_text);
+
+G_END_DECLS
diff --git a/src/libide/projects/libide-projects.h b/src/libide/projects/libide-projects.h
index 62e1cfc75..94f09d500 100644
--- a/src/libide/projects/libide-projects.h
+++ b/src/libide/projects/libide-projects.h
@@ -36,6 +36,7 @@
 #include "ide-recent-projects.h"
 #include "ide-similar-file-locator.h"
 #include "ide-template-base.h"
+#include "ide-template-locator.h"
 #include "ide-template-provider.h"
 
 #undef IDE_PROJECTS_INSIDE
diff --git a/src/libide/projects/meson.build b/src/libide/projects/meson.build
index e4c36399d..9e8bca9da 100644
--- a/src/libide/projects/meson.build
+++ b/src/libide/projects/meson.build
@@ -17,6 +17,7 @@ libide_projects_public_headers = [
   'ide-recent-projects.h',
   'ide-similar-file-locator.h',
   'ide-template-base.h',
+  'ide-template-locator.h',
   'ide-template-provider.h',
   'libide-projects.h',
 ]
@@ -46,6 +47,7 @@ libide_projects_public_sources = [
   'ide-recent-projects.c',
   'ide-similar-file-locator.c',
   'ide-template-base.c',
+  'ide-template-locator.c',
   'ide-template-provider.c',
 ]