[gtksourceview/wip/chergert/vim: 125/363] start on command abstraction

[Christian Hergert <chergert src gnome org>]

commit cce635e84bb4dc2daaf7f68f668d8cf53a79ebbd
Author: Christian Hergert <chergert redhat com>
Date:   Thu Oct 28 21:59:15 2021 -0700

    start on command abstraction

 gtksourceview/vim/gtk-source-vim-command.c | 277 +++++++++++++++++++++++++++++
 gtksourceview/vim/gtk-source-vim-command.h |  39 ++++
 gtksourceview/vim/meson.build              |   1 +
 3 files changed, 317 insertions(+)
---
diff --git a/gtksourceview/vim/gtk-source-vim-command.c b/gtksourceview/vim/gtk-source-vim-command.c
new file mode 100644
index 00000000..c1e7e988
--- /dev/null
+++ b/gtksourceview/vim/gtk-source-vim-command.c
@@ -0,0 +1,277 @@
+/*
+ * This file is part of GtkSourceView
+ *
+ * Copyright 2021 Christian Hergert <chergert redhat com>
+ *
+ * GtkSourceView is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * GtkSourceView 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
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with this library; if not, see <http://www.gnu.org/licenses/>.
+ *
+ * SPDX-License-Identifier: LGPL-2.1-or-later
+ */
+
+#include "config.h"
+
+#include "gtksourcebuffer.h"
+
+#include "gtk-source-vim-command.h"
+
+struct _GtkSourceVimCommand
+{
+       GtkSourceVimState parent_instance;
+       GtkSourceVimMotion *motion;
+       GtkSourceVimMotion *selection_motion;
+       char *command;
+};
+
+G_DEFINE_TYPE (GtkSourceVimCommand, gtk_source_vim_command, GTK_SOURCE_TYPE_VIM_STATE)
+
+enum {
+       PROP_0,
+       PROP_COMMAND,
+       PROP_MOTION,
+       PROP_SELECTION_MOTION,
+       N_PROPS
+};
+
+static GParamSpec *properties[N_PROPS];
+
+static void
+gtk_source_vim_command_join (GtkSourceVimCommand *self)
+{
+       GtkSourceBuffer *buffer;
+       GtkTextIter iter;
+       GtkTextIter selection;
+       GtkTextIter end;
+       guint offset;
+
+       buffer = gtk_source_vim_state_get_buffer (GTK_SOURCE_VIM_STATE (self), &iter, &selection);
+
+       gtk_text_iter_order (&iter, &selection);
+       offset = gtk_text_iter_get_offset (&iter);
+
+       end = iter;
+       if (!gtk_text_iter_ends_line (&end))
+               gtk_text_iter_forward_to_line_end (&end);
+       offset = gtk_text_iter_get_offset (&end);
+
+       gtk_source_buffer_join_lines (buffer, &iter, &selection);
+       gtk_text_buffer_get_iter_at_offset (GTK_TEXT_BUFFER (buffer), &iter, offset);
+       gtk_text_buffer_select_range (GTK_TEXT_BUFFER (buffer), &iter, &iter);
+}
+
+static void
+gtk_source_vim_command_append_command (GtkSourceVimState *state,
+                                       GString           *string)
+{
+       /* command should be empty during command */
+       g_string_truncate (string, 0);
+}
+
+static void
+gtk_source_vim_command_repeat (GtkSourceVimState *state)
+{
+       GtkSourceVimCommand *self = (GtkSourceVimCommand *)state;
+       GtkSourceBuffer *buffer;
+       GtkTextIter iter;
+       GtkTextIter selection;
+
+       g_assert (GTK_SOURCE_IS_VIM_COMMAND (self));
+
+       buffer = gtk_source_vim_state_get_buffer (state, &iter, &selection);
+
+       if (self->motion)
+       {
+               gtk_source_vim_motion_apply (self->motion, &iter, TRUE);
+       }
+
+       if (self->selection_motion)
+       {
+               gtk_source_vim_motion_apply (self->selection_motion, &selection, TRUE);
+       }
+
+       gtk_source_vim_state_select (state, &iter, &selection);
+
+       gtk_text_buffer_begin_user_action (GTK_TEXT_BUFFER (buffer));
+
+       /* XXX: obviously need to add an abstraction here for
+        * registered commands (and possible options on them).
+        */
+
+       if (g_strcmp0 (self->command, ":join") == 0)
+       {
+               gtk_source_vim_command_join (self);
+       }
+
+       gtk_text_buffer_end_user_action (GTK_TEXT_BUFFER (buffer));
+}
+
+static void
+gtk_source_vim_command_leave (GtkSourceVimState *state)
+{
+       gtk_source_vim_command_repeat (state);
+}
+
+static void
+gtk_source_vim_command_dispose (GObject *object)
+{
+       GtkSourceVimCommand *self = (GtkSourceVimCommand *)object;
+
+       g_clear_object (&self->motion);
+       g_clear_object (&self->selection_motion);
+       g_clear_pointer (&self->command, g_free);
+
+       G_OBJECT_CLASS (gtk_source_vim_command_parent_class)->dispose (object);
+}
+
+static void
+gtk_source_vim_command_get_property (GObject    *object,
+                                     guint       prop_id,
+                                     GValue     *value,
+                                     GParamSpec *pspec)
+{
+       GtkSourceVimCommand *self = GTK_SOURCE_VIM_COMMAND (object);
+
+       switch (prop_id)
+       {
+               case PROP_COMMAND:
+                       g_value_set_string (value, self->command);
+                       break;
+
+               case PROP_MOTION:
+                       g_value_set_object (value, self->motion);
+                       break;
+
+               case PROP_SELECTION_MOTION:
+                       g_value_set_object (value, self->selection_motion);
+                       break;
+
+               default:
+                       G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
+       }
+}
+
+static void
+gtk_source_vim_command_set_property (GObject      *object,
+                                     guint         prop_id,
+                                     const GValue *value,
+                                     GParamSpec   *pspec)
+{
+       GtkSourceVimCommand *self = GTK_SOURCE_VIM_COMMAND (object);
+
+       switch (prop_id)
+       {
+               case PROP_COMMAND:
+                       self->command = g_value_dup_string (value);
+                       break;
+
+               case PROP_MOTION:
+                       gtk_source_vim_command_set_motion (self, g_value_get_object (value));
+                       break;
+
+               case PROP_SELECTION_MOTION:
+                       gtk_source_vim_command_set_selection_motion (self, g_value_get_object (value));
+                       break;
+
+               default:
+                       G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
+       }
+}
+
+static void
+gtk_source_vim_command_class_init (GtkSourceVimCommandClass *klass)
+{
+       GtkSourceVimStateClass *state_class = GTK_SOURCE_VIM_STATE_CLASS (klass);
+       GObjectClass *object_class = G_OBJECT_CLASS (klass);
+
+       object_class->dispose = gtk_source_vim_command_dispose;
+       object_class->get_property = gtk_source_vim_command_get_property;
+       object_class->set_property = gtk_source_vim_command_set_property;
+
+       state_class->append_command = gtk_source_vim_command_append_command;
+       state_class->leave = gtk_source_vim_command_leave;
+       state_class->repeat = gtk_source_vim_command_repeat;
+
+       properties [PROP_COMMAND] =
+               g_param_spec_string ("command",
+                                    "Command",
+                                    "The command to run",
+                                    NULL,
+                                    (G_PARAM_READWRITE | G_PARAM_CONSTRUCT_ONLY | G_PARAM_STATIC_STRINGS));
+
+       properties [PROP_MOTION] =
+               g_param_spec_object ("motion",
+                                    "Motion",
+                                    "The motion for the insertion cursor",
+                                    GTK_SOURCE_TYPE_VIM_MOTION,
+                                    (G_PARAM_READWRITE | G_PARAM_EXPLICIT_NOTIFY | G_PARAM_STATIC_STRINGS));
+
+       properties [PROP_SELECTION_MOTION] =
+               g_param_spec_object ("selection-motion",
+                                    "Seleciton Motion",
+                                    "The motion for the selection bound",
+                                    GTK_SOURCE_TYPE_VIM_MOTION,
+                                    (G_PARAM_READWRITE | G_PARAM_EXPLICIT_NOTIFY | G_PARAM_STATIC_STRINGS));
+
+       g_object_class_install_properties (object_class, N_PROPS, properties);
+}
+
+static void
+gtk_source_vim_command_init (GtkSourceVimCommand *self)
+{
+}
+
+void
+gtk_source_vim_command_set_motion (GtkSourceVimCommand *self,
+                                   GtkSourceVimMotion  *motion)
+{
+       g_return_if_fail (GTK_SOURCE_IS_VIM_COMMAND (self));
+       g_return_if_fail (!motion || GTK_SOURCE_IS_VIM_MOTION (motion));
+
+       if (g_set_object (&self->motion, motion))
+       {
+               if (motion)
+               {
+                       gtk_source_vim_state_set_parent (GTK_SOURCE_VIM_STATE (motion),
+                                                        GTK_SOURCE_VIM_STATE (self));
+               }
+
+               g_object_notify_by_pspec (G_OBJECT (self), properties[PROP_MOTION]);
+       }
+}
+
+void
+gtk_source_vim_command_set_selection_motion (GtkSourceVimCommand *self,
+                                             GtkSourceVimMotion  *selection_motion)
+{
+       g_return_if_fail (GTK_SOURCE_IS_VIM_COMMAND (self));
+       g_return_if_fail (!selection_motion || GTK_SOURCE_IS_VIM_MOTION (selection_motion));
+
+       if (g_set_object (&self->selection_motion, selection_motion))
+       {
+               if (selection_motion)
+               {
+                       gtk_source_vim_state_set_parent (GTK_SOURCE_VIM_STATE (selection_motion),
+                                                        GTK_SOURCE_VIM_STATE (self));
+               }
+
+               g_object_notify_by_pspec (G_OBJECT (self), properties[PROP_SELECTION_MOTION]);
+       }
+}
+
+const char *
+gtk_source_vim_command_get_command (GtkSourceVimCommand *self)
+{
+       g_return_val_if_fail (GTK_SOURCE_IS_VIM_COMMAND (self), NULL);
+
+       return self->command;
+}
diff --git a/gtksourceview/vim/gtk-source-vim-command.h b/gtksourceview/vim/gtk-source-vim-command.h
new file mode 100644
index 00000000..7a6dcbc5
--- /dev/null
+++ b/gtksourceview/vim/gtk-source-vim-command.h
@@ -0,0 +1,39 @@
+/*
+ * This file is part of GtkSourceView
+ *
+ * Copyright 2021 Christian Hergert <chergert redhat com>
+ *
+ * GtkSourceView is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * GtkSourceView 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
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with this library; if not, see <http://www.gnu.org/licenses/>.
+ *
+ * SPDX-License-Identifier: LGPL-2.1-or-later
+ */
+
+#pragma once
+
+#include "gtk-source-vim-motion.h"
+#include "gtk-source-vim-state.h"
+
+G_BEGIN_DECLS
+
+#define GTK_SOURCE_TYPE_VIM_COMMAND (gtk_source_vim_command_get_type())
+
+G_DECLARE_FINAL_TYPE (GtkSourceVimCommand, gtk_source_vim_command, GTK_SOURCE, VIM_COMMAND, 
GtkSourceVimState)
+
+const char *gtk_source_vim_command_get_command          (GtkSourceVimCommand *self);
+void        gtk_source_vim_command_set_motion           (GtkSourceVimCommand *self,
+                                                         GtkSourceVimMotion  *motion);
+void        gtk_source_vim_command_set_selection_motion (GtkSourceVimCommand *self,
+                                                         GtkSourceVimMotion  *selection_motion);
+
+G_END_DECLS
diff --git a/gtksourceview/vim/meson.build b/gtksourceview/vim/meson.build
index b164ce2a..0c2e3118 100644
--- a/gtksourceview/vim/meson.build
+++ b/gtksourceview/vim/meson.build
@@ -1,5 +1,6 @@
 vim_sources = files([
   'gtk-source-vim.c',
+  'gtk-source-vim-command.c',
   'gtk-source-vim-command-bar.c',
   'gtk-source-vim-delete.c',
   'gtk-source-vim-motion.c',