[gnome-builder] libide: port GbSourceViewMode to IdeSourceViewMode

[Christian Hergert <chergert src gnome org>]

commit cd1b1dfef430d165aeef9fb522f4aa1d0f2421ff
Author: Christian Hergert <christian hergert me>
Date:   Tue Mar 3 15:08:58 2015 -0800

    libide: port GbSourceViewMode to IdeSourceViewMode

 libide/Makefile.am            |    2 +
 libide/ide-internal.h         |    9 ++
 libide/ide-source-view-mode.c |  244 +++++++++++++++++++++++++++++++++++++++++
 libide/ide-source-view-mode.h |   69 ++++++++++++
 4 files changed, 324 insertions(+), 0 deletions(-)
---
diff --git a/libide/Makefile.am b/libide/Makefile.am
index 00b9a17..4012c4b 100644
--- a/libide/Makefile.am
+++ b/libide/Makefile.am
@@ -141,6 +141,8 @@ libide_1_0_la_public_sources = \
        libide/ide-source-snippets.h \
        libide/ide-source-view.c \
        libide/ide-source-view.h \
+       libide/ide-source-view-mode.c \
+       libide/ide-source-view-mode.h \
        libide/ide-symbol-resolver.c \
        libide/ide-symbol-resolver.h \
        libide/ide-symbol.c \
diff --git a/libide/ide-internal.h b/libide/ide-internal.h
index c37c33c..3c9c849 100644
--- a/libide/ide-internal.h
+++ b/libide/ide-internal.h
@@ -25,6 +25,8 @@
 #include "ide-clang-translation-unit.h"
 #include "ide-diagnostic.h"
 #include "ide-types.h"
+#include "ide-source-view.h"
+#include "ide-source-view-mode.h"
 
 G_BEGIN_DECLS
 
@@ -60,6 +62,13 @@ void _ide_search_context_add_provider (IdeSearchContext  *context,
 IdeSourceRange *_ide_source_range_new (IdeSourceLocation *begin,
                                        IdeSourceLocation *end);
 
+gboolean           _ide_source_view_mode_do_event (IdeSourceViewMode     *mode,
+                                                   GdkEventKey           *event,
+                                                   gboolean              *remove);
+IdeSourceViewMode *_ide_source_view_mode_new      (GtkWidget             *view,
+                                                   const char            *mode,
+                                                   IdeSourceViewModeType  type);
+
 
 G_END_DECLS
 
diff --git a/libide/ide-source-view-mode.c b/libide/ide-source-view-mode.c
new file mode 100644
index 0000000..fbee293
--- /dev/null
+++ b/libide/ide-source-view-mode.c
@@ -0,0 +1,244 @@
+/* ide-key-mode.c
+ *
+ * Copyright (C) 2015 Alexander Larsson <alexl 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/>.
+ */
+
+#define G_LOG_DOMAIN "ide-source-view-mode"
+
+#include <glib/gi18n.h>
+
+#include "ide-source-view-mode.h"
+
+typedef struct
+{
+  GtkWidget             *view;
+  char                  *name;
+  IdeSourceViewModeType  type;
+} IdeSourceViewModePrivate;
+
+G_DEFINE_TYPE_WITH_PRIVATE (IdeSourceViewMode, ide_source_view_mode, GTK_TYPE_WIDGET)
+
+static void
+ide_source_view_mode_finalize (GObject *object)
+{
+  IdeSourceViewMode *self = (IdeSourceViewMode *)object;
+  IdeSourceViewModePrivate *priv = ide_source_view_mode_get_instance_private (self);
+
+  g_clear_object (&priv->view);
+  g_free (priv->name);
+
+  G_OBJECT_CLASS (ide_source_view_mode_parent_class)->finalize (object);
+}
+
+static void
+proxy_closure_marshal (GClosure     *closure,
+                       GValue       *return_value,
+                       guint         n_param_values,
+                       const GValue *param_values,
+                       gpointer      invocation_hint,
+                       gpointer      marshal_data)
+{
+  IdeSourceViewMode *mode;
+  IdeSourceViewModePrivate *priv;
+  GValue *param_copy;
+
+  mode = IDE_SOURCE_VIEW_MODE (g_value_get_object (&param_values[0]));
+  priv = ide_source_view_mode_get_instance_private (mode);
+
+  param_copy = g_memdup (param_values, sizeof (GValue) * n_param_values);
+
+  param_copy[0].data[0].v_pointer = priv->view;
+  g_signal_emitv (param_copy,
+                  GPOINTER_TO_INT (closure->data),
+                  0,
+                  return_value);
+  g_free (param_copy);
+}
+
+static void
+proxy_all_action_signals (GType type)
+{
+  GClosure *proxy;
+  guint *signals;
+  guint n_signals, i;
+  GSignalQuery query;
+
+  signals = g_signal_list_ids (type, &n_signals);
+  for (i = 0; i < n_signals; i++)
+    {
+      g_signal_query (signals[i], &query);
+
+      if (query.signal_flags & G_SIGNAL_ACTION)
+        {
+          proxy = g_closure_new_simple (sizeof (GClosure), GINT_TO_POINTER (query.signal_id));
+          g_closure_set_meta_marshal (proxy, NULL, proxy_closure_marshal);
+          g_signal_newv (query.signal_name,
+                         IDE_TYPE_SOURCE_VIEW_MODE,
+                         G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
+                         proxy,
+                         NULL, NULL, NULL,
+                         query.return_type,
+                         query.n_params,
+                         (GType *)query.param_types);
+        }
+    }
+}
+
+static void
+ide_source_view_mode_class_init (IdeSourceViewModeClass *klass)
+{
+  GObjectClass *object_class = G_OBJECT_CLASS (klass);
+  GtkBindingSet *binding_set, *parent_binding_set;
+  GType type;
+
+  object_class->finalize = ide_source_view_mode_finalize;
+
+  /* Proxy all action signals from source view */
+  type = IDE_TYPE_SOURCE_VIEW;
+  while (type != G_TYPE_INVALID && type != GTK_TYPE_WIDGET)
+    {
+      proxy_all_action_signals (type);
+      type = g_type_parent (type);
+    }
+
+  /* Add unbind all entries from parent classes (which is
+     really just the GtkWidget ones) so that we *only* add
+     stuff via modes. Any default ones are handled in the
+     normal fallback paths after mode elements are done. */
+  binding_set = gtk_binding_set_by_class (klass);
+
+  type = g_type_parent (IDE_TYPE_SOURCE_VIEW_MODE);
+  while (type)
+    {
+      parent_binding_set = gtk_binding_set_find (g_type_name (type));
+      type = g_type_parent (type);
+
+      if (parent_binding_set)
+        {
+          GtkBindingEntry *entry = parent_binding_set->entries;
+
+          while (entry != NULL)
+            {
+              gtk_binding_entry_skip (binding_set, entry->keyval, entry->modifiers);
+              entry = entry->set_next;
+            }
+        }
+    }
+}
+
+static void
+ide_source_view_mode_init (IdeSourceViewMode *mode)
+{
+}
+
+static gboolean
+is_modifier_key (GdkEventKey *event)
+{
+  static const guint modifier_keyvals[] = {
+    GDK_KEY_Shift_L, GDK_KEY_Shift_R, GDK_KEY_Shift_Lock,
+    GDK_KEY_Caps_Lock, GDK_KEY_ISO_Lock, GDK_KEY_Control_L,
+    GDK_KEY_Control_R, GDK_KEY_Meta_L, GDK_KEY_Meta_R,
+    GDK_KEY_Alt_L, GDK_KEY_Alt_R, GDK_KEY_Super_L, GDK_KEY_Super_R,
+    GDK_KEY_Hyper_L, GDK_KEY_Hyper_R, GDK_KEY_ISO_Level3_Shift,
+    GDK_KEY_ISO_Next_Group, GDK_KEY_ISO_Prev_Group,
+    GDK_KEY_ISO_First_Group, GDK_KEY_ISO_Last_Group,
+    GDK_KEY_Mode_switch, GDK_KEY_Num_Lock, GDK_KEY_Multi_key,
+    GDK_KEY_Scroll_Lock,
+    0
+  };
+  const guint *ac_val;
+
+  ac_val = modifier_keyvals;
+  while (*ac_val)
+    {
+      if (event->keyval == *ac_val++)
+        return TRUE;
+    }
+
+  return FALSE;
+}
+
+gboolean
+_ide_source_view_mode_do_event (IdeSourceViewMode *mode,
+                                GdkEventKey       *event,
+                                gboolean          *remove)
+{
+  IdeSourceViewModePrivate *priv = ide_source_view_mode_get_instance_private (mode);
+  GtkStyleContext *context;
+  gboolean handled;
+
+  g_return_val_if_fail (IDE_IS_SOURCE_VIEW_MODE (mode), FALSE);
+  g_return_val_if_fail (event, FALSE);
+  g_return_val_if_fail (remove, FALSE);
+
+  context = gtk_widget_get_style_context (GTK_WIDGET (mode));
+
+  gtk_style_context_save (context);
+
+  gtk_style_context_add_class (context, priv->name);
+
+  handled = gtk_bindings_activate_event (G_OBJECT (mode), event);
+
+  gtk_style_context_restore (context);
+
+  *remove = FALSE;
+  switch (priv->type)
+    {
+    default:
+    case IDE_SOURCE_VIEW_MODE_TYPE_TRANSIENT:
+      if (handled)
+        {
+          *remove = TRUE;
+        }
+      else
+        {
+          if (!is_modifier_key (event))
+            {
+              gtk_widget_error_bell (priv->view);
+              handled = TRUE;
+              *remove = TRUE;
+            }
+        }
+      break;
+
+    case IDE_SOURCE_VIEW_MODE_TYPE_PERMANENT:
+      break;
+
+    case IDE_SOURCE_VIEW_MODE_TYPE_MODAL:
+      handled = TRUE;
+      break;
+    }
+
+  return handled;
+}
+
+IdeSourceViewMode *
+_ide_source_view_mode_new (GtkWidget             *view,
+                           const char            *name,
+                           IdeSourceViewModeType  type)
+{
+  IdeSourceViewModePrivate *priv;
+  IdeSourceViewMode *mode;
+
+  mode = g_object_new (IDE_TYPE_SOURCE_VIEW_MODE, NULL);
+  priv = ide_source_view_mode_get_instance_private (mode);
+
+  priv->view = g_object_ref (view);
+  priv->name = g_strdup (name);
+  priv->type = type;
+
+  return g_object_ref_sink (mode);
+}
diff --git a/libide/ide-source-view-mode.h b/libide/ide-source-view-mode.h
new file mode 100644
index 0000000..e705b3e
--- /dev/null
+++ b/libide/ide-source-view-mode.h
@@ -0,0 +1,69 @@
+/* ide-key-mode.h
+ *
+ * Copyright (C) 2015 Alexander Larsson <alexl 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/>.
+ */
+
+#ifndef IDE_SOURCE_VIEW_MODE_H
+#define IDE_SOURCE_VIEW_MODE_H
+
+#include <gtk/gtk.h>
+
+#include "ide-source-view.h"
+#include "ide-types.h"
+
+G_BEGIN_DECLS
+
+#define IDE_TYPE_SOURCE_VIEW_MODE            (ide_source_view_mode_get_type())
+#define IDE_SOURCE_VIEW_MODE(obj)            (G_TYPE_CHECK_INSTANCE_CAST ((obj), IDE_TYPE_SOURCE_VIEW_MODE, 
IdeSourceViewMode))
+#define IDE_SOURCE_VIEW_MODE_CONST(obj)      (G_TYPE_CHECK_INSTANCE_CAST ((obj), IDE_TYPE_SOURCE_VIEW_MODE, 
IdeSourceViewMode const))
+#define IDE_SOURCE_VIEW_MODE_CLASS(klass)    (G_TYPE_CHECK_CLASS_CAST ((klass),  IDE_TYPE_SOURCE_VIEW_MODE, 
IdeSourceViewModeClass))
+#define IDE_IS_SOURCE_VIEW_MODE(obj)         (G_TYPE_CHECK_INSTANCE_TYPE ((obj), IDE_TYPE_SOURCE_VIEW_MODE))
+#define IDE_IS_SOURCE_VIEW_MODE_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE ((klass),  IDE_TYPE_SOURCE_VIEW_MODE))
+#define IDE_SOURCE_VIEW_MODE_GET_CLASS(obj)  (G_TYPE_INSTANCE_GET_CLASS ((obj),  IDE_TYPE_SOURCE_VIEW_MODE, 
IdeSourceViewModeClass))
+
+typedef struct _IdeSourceViewMode        IdeSourceViewMode;
+typedef struct _IdeSourceViewModeClass   IdeSourceViewModeClass;
+
+struct _IdeSourceViewMode
+{
+  GtkWidget parent;
+};
+
+struct _IdeSourceViewModeClass
+{
+  GtkWidgetClass parent_class;
+};
+
+/**
+ * IdeSourceViewModeType:
+ * @IDE_SOURCE_VIEW_MODE_TRANSIENT: Transient
+ * @IDE_SOURCE_VIEW_MODE_PERMANENT: Permanent
+ * @IDE_SOURCE_VIEW_MODE_MODAL: Modal
+ *
+ * The type of keyboard mode.
+ */
+typedef enum
+{
+  IDE_SOURCE_VIEW_MODE_TYPE_TRANSIENT,
+  IDE_SOURCE_VIEW_MODE_TYPE_PERMANENT,
+  IDE_SOURCE_VIEW_MODE_TYPE_MODAL
+} IdeSourceViewModeType;
+
+GType ide_source_view_mode_get_type (void);
+
+G_END_DECLS
+
+#endif /* IDE_SOURCE_VIEW_MODE_H */