Added Context and UIContext classes.

Added CurrentSprite class.
Removed current_sprite global.
Moved all functions of 'sprites' module to Context/UIContext.

TODO.txt

@@ -43,10 +43,7 @@ Wish-list
 - dacap wish-list:
   + added starred file-items in the file-selector.
   + add AseContext structure to handle the current state of the
-    application (and hook changes in the context/options):
-  + src/ase/ directory
-  + src/ase/context.[ch]
-  + the current sprite should be in the AseContext
+    application (and hook changes in the context/options).
   + the commands should be enabled/disabled/checked by the current
     context state
   + the commands should use a new ase/ API and not the raster/ low-level
@@ -54,10 +51,6 @@ Wish-list
     - All "functions.c" should be in Undoable
   + the dependencies should be:
     commands/ -> ase/ -> raster/ -> jinete/
-  + the list of 'sprites' should be in the context (maybe a
-    AseSharedContext).
-  + the scripts should start with a new default AseContext (but
-    with the AseSharedContext visible)
 - manuq wish-list:
   + layer-with-constant-cel
 - Mateusz Czaplinski ideas:

makefile.gcc

@@ -80,6 +80,7 @@ $(ZLIB_LIB): $(ZLIB_OBJS)
 # Rules to build objects and the application
 
 VPATH = src					\
+	src/ase					\
 	src/commands				\
 	src/commands/fx				\
 	src/console				\

makefile.lst

@@ -6,6 +6,8 @@
 ASE = aseprite$(EXE)
 
 COMMON_SOURCES =					\
+	src/ase/context.cpp				\
+	src/ase/ui_context.cpp				\
 	src/commands/cmd_about.cpp			\
 	src/commands/cmd_advanced_mode.cpp		\
 	src/commands/cmd_background_from_layer.cpp	\

makefile.vc

@@ -94,6 +94,7 @@ $(ZLIB_LIB): $(ZLIB_OBJS)
 # Rules to build objects and the application
 
 VPATH = src					\
+	src/ase					\
 	src/commands				\
 	src/commands/fx				\
 	src/console				\

src/ase/context.cpp

@@ -0,0 +1,138 @@
+/* ASE - Allegro Sprite Editor
+ * Copyright (C) 2001-2009  David Capello
+ *
+ * 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 2 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, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ */
+
+#include "config.h"
+
+#include <cassert>
+#include <algorithm>
+
+#include "ase/context.h"
+
+Context::Context()
+{
+  m_current_sprite = NULL;
+}
+
+Context::~Context()
+{
+  for (SpriteList::iterator
+	 it = m_sprites.begin(); it != m_sprites.end(); ++it) {
+    Sprite* sprite = *it;
+    delete sprite;
+  }
+  m_sprites.clear();
+}
+
+const SpriteList& Context::get_sprite_list() const
+{
+  return m_sprites;
+}
+
+Sprite* Context::get_first_sprite() const
+{
+  if (!m_sprites.empty())
+    return m_sprites.front();
+  else
+    return NULL;
+}
+
+Sprite* Context::get_next_sprite(Sprite* sprite) const
+{
+  assert(sprite != NULL);
+
+  SpriteList::const_iterator it = std::find(m_sprites.begin(), m_sprites.end(), sprite);
+
+  if (it != m_sprites.end()) {
+    ++it;
+    if (it != m_sprites.end())
+      return *it;
+  }
+  return NULL;
+}
+
+/**
+ * Append the sprite to the context's sprites' list.
+ */
+void Context::add_sprite(Sprite* sprite)
+{
+  assert(sprite != NULL);
+
+  m_sprites.push_front(sprite);
+
+  // generate on_add_sprite event
+  on_add_sprite(sprite);
+}
+
+void Context::remove_sprite(Sprite* sprite)
+{
+  assert(sprite != NULL);
+
+  SpriteList::iterator it = std::find(m_sprites.begin(), m_sprites.end(), sprite);
+  assert(it != m_sprites.end());
+
+  // remove the item from the sprites list
+  m_sprites.erase(it);
+
+  // generate on_remove_sprite event
+  on_remove_sprite(sprite);
+
+  // the current sprite cannot be the removed sprite anymore
+  if (m_current_sprite == sprite)
+    set_current_sprite(NULL);
+}
+
+void Context::send_sprite_to_top(Sprite* sprite)
+{
+  assert(sprite);
+
+  SpriteList::iterator it = std::find(m_sprites.begin(), m_sprites.end(), sprite);
+  assert(it != m_sprites.end());
+
+  // remove the item from the sprites list
+  m_sprites.erase(it);
+
+  // add it again
+  m_sprites.push_front(sprite);
+}
+
+Sprite* Context::get_current_sprite() const
+{
+  return m_current_sprite;
+}
+
+void Context::set_current_sprite(Sprite* sprite)
+{
+  m_current_sprite = sprite;
+
+  on_set_current_sprite(sprite);
+}
+
+void Context::on_add_sprite(Sprite* sprite)
+{
+  // do nothing
+}
+
+void Context::on_remove_sprite(Sprite* sprite)
+{
+  // do nothing
+}
+
+void Context::on_set_current_sprite(Sprite* sprite)
+{
+  // do nothing
+}

src/ase/context.h

@@ -0,0 +1,65 @@
+/* ASE - Allegro Sprite Editor
+ * Copyright (C) 2001-2009  David Capello
+ *
+ * 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 2 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, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ */
+
+#ifndef ASE_CONTEXT_H
+#define ASE_CONTEXT_H
+
+#include <list>
+
+class Sprite;
+
+typedef std::list<Sprite*> SpriteList;
+
+class Context
+{
+  /**
+   * List of all sprites.
+   */
+  SpriteList m_sprites;
+
+  /**
+   * Current selected sprite to operate.
+   */
+  Sprite* m_current_sprite;
+
+public:
+
+  Context();
+  virtual ~Context();
+
+  const SpriteList& get_sprite_list() const;
+  Sprite* get_first_sprite() const;
+  Sprite* get_next_sprite(Sprite* sprite) const;
+
+  void add_sprite(Sprite* sprite);
+  void remove_sprite(Sprite* sprite);
+  void send_sprite_to_top(Sprite* sprite);
+
+  Sprite* get_current_sprite() const;
+  void set_current_sprite(Sprite* sprite);
+
+protected:
+
+  virtual void on_add_sprite(Sprite* sprite);
+  virtual void on_remove_sprite(Sprite* sprite);
+  virtual void on_set_current_sprite(Sprite* sprite);
+
+};
+
+#endif // ASE_CONTEXT_H
+

src/ase/ui_context.cpp

@@ -0,0 +1,98 @@
+/* ASE - Allegro Sprite Editor
+ * Copyright (C) 2001-2009  David Capello
+ *
+ * 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 2 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, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ */
+
+#include "config.h"
+
+#include <cassert>
+#include <allegro/file.h>
+
+#include "ase/ui_context.h"
+#include "core/app.h"
+#include "modules/editors.h"
+#include "raster/sprite.h"
+#include "widgets/tabs.h"
+
+//////////////////////////////////////////////////////////////////////
+// UIContext singleton
+
+static UIContext* g_instance = NULL;
+
+UIContext* UIContext::instance()
+{
+  if (!g_instance)
+    g_instance = new UIContext;
+  return g_instance;
+}
+
+void UIContext::destroy_instance()
+{
+  delete g_instance;
+  g_instance = NULL;
+}
+
+//////////////////////////////////////////////////////////////////////
+
+UIContext::UIContext()
+{
+}
+
+UIContext::~UIContext()
+{
+}
+
+void UIContext::show_sprite(Sprite* sprite) const
+{
+  set_sprite_in_more_reliable_editor(sprite);
+}
+
+void UIContext::on_add_sprite(Sprite* sprite)
+{
+  // base method
+  Context::on_add_sprite(sprite);
+
+  // add the tab for this sprite
+  tabs_append_tab(app_get_tabsbar(),
+		  get_filename(sprite->filename), sprite);
+
+  // rebuild the menu list of sprites
+  app_realloc_sprite_list();
+}
+
+void UIContext::on_remove_sprite(Sprite* sprite)
+{
+  // base method
+  Context::on_remove_sprite(sprite);
+
+  // remove this sprite from tabs
+  tabs_remove_tab(app_get_tabsbar(), sprite);
+
+  // rebuild the menu list of sprites
+  app_realloc_sprite_list();
+
+  // select other sprites in the editors where are this sprite
+  editors_hide_sprite(sprite);
+}
+
+void UIContext::on_set_current_sprite(Sprite* sprite)
+{
+  // base method
+  Context::on_set_current_sprite(sprite);
+
+  // select the sprite in the tabs
+  tabs_select_tab(app_get_tabsbar(), sprite);
+}

src/ase/ui_context.h

@@ -0,0 +1,44 @@
+/* ASE - Allegro Sprite Editor
+ * Copyright (C) 2001-2009  David Capello
+ *
+ * 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 2 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, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ */
+
+#ifndef ASE_UI_CONTEXT_H
+#define ASE_UI_CONTEXT_H
+
+#include "ase/context.h"
+
+class UIContext : public Context
+{
+public:
+
+  static UIContext* instance();
+  static void destroy_instance();
+
+  UIContext();
+  virtual ~UIContext();
+
+  void show_sprite(Sprite* sprite) const;
+
+protected:
+
+  virtual void on_add_sprite(Sprite* sprite);
+  virtual void on_remove_sprite(Sprite* sprite);
+  virtual void on_set_current_sprite(Sprite* sprite);
+
+};
+
+#endif // ASE_UI_CONTEXT_H

src/commands/cmd_background_from_layer.cpp

@@ -29,18 +29,19 @@
 
 static bool cmd_background_from_layer_enabled(const char *argument)
 {
+  CurrentSprite sprite;
   return
-    current_sprite != NULL &&
-    current_sprite->layer != NULL &&
-    sprite_get_background_layer(current_sprite) == NULL &&
-    layer_is_image(current_sprite->layer) &&
-    layer_is_readable(current_sprite->layer) &&
-    layer_is_writable(current_sprite->layer);
+    sprite != NULL &&
+    sprite->layer != NULL &&
+    sprite_get_background_layer(sprite) == NULL &&
+    layer_is_image(sprite->layer) &&
+    layer_is_readable(sprite->layer) &&
+    layer_is_writable(sprite->layer);
 }
 
 static void cmd_background_from_layer_execute(const char *argument)
 {
-  Sprite *sprite = current_sprite;
+  CurrentSprite sprite;
 
   // each frame of the layer to be converted as `Background' must be
   // cleared using the selected background color in the color-bar

src/commands/cmd_canvas_size.cpp

@@ -34,13 +34,14 @@
 
 static bool cmd_canvas_size_enabled(const char *argument)
 {
-  return current_sprite != NULL;
+  CurrentSprite sprite;
+  return sprite != NULL;
 }
 
 static void cmd_canvas_size_execute(const char *argument)
 {
   JWidget window, left, top, right, bottom, ok;
-  Sprite* sprite = current_sprite;
+  CurrentSprite sprite;
 
   // load the window widget
   window = load_widget("canvas.jid", "canvas_size");

src/commands/cmd_cel_properties.cpp

@@ -36,9 +36,8 @@
 
 static bool cmd_cel_properties_enabled(const char *argument)
 {
-  return
-    is_current_sprite_not_locked()
-    && current_sprite->layer;
+  CurrentSprite sprite;
+  return sprite && sprite->layer;
 }
 
 static void cmd_cel_properties_execute(const char *argument)
@@ -46,14 +45,13 @@ static void cmd_cel_properties_execute(const char *argument)
   JWidget window = NULL;
   JWidget label_frame, label_pos, label_size;
   JWidget slider_opacity, button_ok;
-  Sprite *sprite;
   Layer *layer;
   Cel *cel;
   char buf[1024];
   int memsize;
 
   /* get current sprite */
-  sprite = lock_current_sprite();
+  CurrentSprite sprite;
   if (!sprite)
     return;
 
@@ -147,8 +145,6 @@ static void cmd_cel_properties_execute(const char *argument)
 done:;
   if (window)
     jwidget_free(window);
-
-  sprite_unlock(sprite);
 }
 
 Command cmd_cel_properties = {

src/commands/cmd_change_image_type.cpp

@@ -32,12 +32,14 @@
 
 static bool cmd_change_image_type_enabled(const char *argument)
 {
-  return current_sprite != NULL;
+  CurrentSprite sprite;
+  return sprite;
 }
 
 static void cmd_change_image_type_execute(const char *argument)
 {
   JWidget window, from, radio1, radio2, radio3, dither1, dither2;
+  CurrentSprite current_sprite;
 
   /* load the window widget */
   window = load_widget("imgtype.jid", "image_type");

src/commands/cmd_clear.cpp

@@ -30,22 +30,27 @@
 
 static bool cmd_clear_enabled(const char *argument)
 {
+  CurrentSprite sprite;
   return
-    current_sprite != NULL &&
-    current_sprite->layer != NULL &&
-    layer_is_image(current_sprite->layer) &&
-    layer_is_readable(current_sprite->layer) &&
-    layer_is_writable(current_sprite->layer);
+    sprite != NULL &&
+    sprite->layer != NULL &&
+    layer_is_image(sprite->layer) &&
+    layer_is_readable(sprite->layer) &&
+    layer_is_writable(sprite->layer);
 }
 
 static void cmd_clear_execute(const char *argument)
 {
-  Sprite* sprite = current_sprite;
+  CurrentSprite sprite;
+  if (!sprite)
+    return;
+
   {
     Undoable undoable(sprite, "Clear");
     undoable.clear_mask(app_get_color_to_clear_layer(sprite->layer));
     undoable.commit();
   }
+
   update_screen_for_sprite(sprite);
 }
 

src/commands/cmd_close_file.cpp

@@ -21,6 +21,7 @@
 #include <allegro.h>
 #include "jinete/jinete.h"
 
+#include "ase/ui_context.h"
 #include "commands/commands.h"
 #include "core/app.h"
 #include "modules/sprites.h"
@@ -34,7 +35,8 @@ static bool close_current_sprite();
 
 static bool cmd_close_file_enabled(const char *argument)
 {
-  return current_sprite != NULL;
+  CurrentSprite sprite;
+  return sprite != NULL;
 }
 
 static void cmd_close_file_execute(const char *argument)
@@ -48,17 +50,23 @@ static void cmd_close_file_execute(const char *argument)
 
 static bool cmd_close_all_files_enabled(const char *argument)
 {
-  return !jlist_empty(get_sprite_list());
+  return !UIContext::instance()->get_sprite_list().empty();
 }
 
 static void cmd_close_all_files_execute(const char *argument)
 {
-  if (!current_sprite)
-    sprite_show(get_first_sprite());
+  UIContext* context = UIContext::instance();
+  if (!context->get_current_sprite())
+    context->show_sprite(context->get_first_sprite());
 
-  while (current_sprite != NULL &&
-	 close_current_sprite())
-    ;
+  while (true) {
+    if (context->get_current_sprite() != NULL) {
+      if (!close_current_sprite())
+	break;
+    }
+    else
+      break;
+  }
 }
 
 /**
@@ -67,7 +75,9 @@ static void cmd_close_all_files_execute(const char *argument)
  */
 static bool close_current_sprite()
 {
-  Sprite *sprite = current_sprite;
+  CurrentSprite sprite;
+  if (!sprite.writeable())
+    return false;
 
   /* see if the sprite has changes */
   while (sprite_is_modified(sprite)) {
@@ -83,7 +93,7 @@ static bool close_current_sprite()
     }
     else if (ret != 2) {
       /* "cancel" or "ESC" */
-      return FALSE; /* we back doing nothing */
+      return false; /* we back doing nothing */
     }
     else {
       /* "discard" */
@@ -92,9 +102,8 @@ static bool close_current_sprite()
   }
 
   /* closes the sprite */
-  sprite_unmount(sprite);
-  sprite_free(sprite);
-  return TRUE;
+  sprite.destroy();
+  return true;
 }
 
 Command cmd_close_file = {

src/commands/cmd_configure_tools.cpp

@@ -325,7 +325,7 @@ static bool view_grid_check_change_hook(JWidget widget, void *data)
 
 static bool set_grid_button_select_hook(JWidget widget, void *data)
 {
-  Sprite *sprite = current_sprite;
+  CurrentSprite sprite;
 
   if (sprite && sprite->mask && sprite->mask->bitmap) {
     JRect rect = jrect_new(sprite->mask->x,

src/commands/cmd_copy.cpp

@@ -30,20 +30,23 @@
 
 static bool cmd_copy_enabled(const char *argument)
 {
-  if ((!current_sprite) ||
-      (!current_sprite->layer) ||
-      (!layer_is_readable(current_sprite->layer)) ||
-      (!layer_is_writable(current_sprite->layer)) ||
-      (!current_sprite->mask) ||
-      (!current_sprite->mask->bitmap))
-    return FALSE;
+  CurrentSprite sprite;
+
+  if ((!sprite) ||
+      (!sprite->layer) ||
+      (!layer_is_readable(sprite->layer)) ||
+      (!layer_is_writable(sprite->layer)) ||
+      (!sprite->mask) ||
+      (!sprite->mask->bitmap))
+    return false;
   else
-    return GetImage(current_sprite) ? TRUE: FALSE;
+    return GetImage(sprite) ? true: false;
 }
 
 static void cmd_copy_execute(const char *argument)
 {
-  clipboard::copy(current_sprite);
+  CurrentSprite sprite;
+  clipboard::copy(sprite);
 }
 
 Command cmd_copy = {

src/commands/cmd_crop.cpp

@@ -38,15 +38,16 @@
 
 static bool cmd_crop_sprite_enabled(const char *argument)
 {
+  CurrentSprite sprite;
   return
-    current_sprite != NULL &&
-    current_sprite->mask != NULL &&
-    current_sprite->mask->bitmap != NULL;
+    sprite != NULL &&
+    sprite->mask != NULL &&
+    sprite->mask->bitmap != NULL;
 }
 
 static void cmd_crop_sprite_execute(const char *argument)
 {
-  Sprite *sprite = current_sprite;
+  CurrentSprite sprite;
   {
     Undoable undoable(sprite, "Sprite Crop");
     int bgcolor = get_color_for_image(sprite->imgtype,
@@ -68,12 +69,13 @@ static void cmd_crop_sprite_execute(const char *argument)
 
 static bool cmd_autocrop_sprite_enabled(const char *argument)
 {
-  return current_sprite != NULL;
+  CurrentSprite sprite;
+  return sprite != NULL;
 }
 
 static void cmd_autocrop_sprite_execute(const char *argument)
 {
-  Sprite *sprite = current_sprite;
+  CurrentSprite sprite;
   {
     Undoable undoable(sprite, "Sprite Autocrop");
     undoable.autocrop_sprite(colorbar_get_bg_color(app_get_colorbar()));

src/commands/cmd_cut.cpp

@@ -30,20 +30,22 @@
 
 static bool cmd_cut_enabled(const char *argument)
 {
-  if ((!current_sprite) ||
-      (!current_sprite->layer) ||
-      (!layer_is_readable(current_sprite->layer)) ||
-      (!layer_is_writable(current_sprite->layer)) ||
-      (!current_sprite->mask) ||
-      (!current_sprite->mask->bitmap))
-    return FALSE;
+  CurrentSprite sprite;
+  if ((!sprite) ||
+      (!sprite->layer) ||
+      (!layer_is_readable(sprite->layer)) ||
+      (!layer_is_writable(sprite->layer)) ||
+      (!sprite->mask) ||
+      (!sprite->mask->bitmap))
+    return false;
   else
-    return GetImage(current_sprite) ? TRUE: FALSE;
+    return GetImage(sprite) ? true: false;
 }
 
 static void cmd_cut_execute(const char *argument)
 {
-  clipboard::cut(current_sprite);
+  CurrentSprite sprite;
+  clipboard::cut(sprite);
 }
 
 Command cmd_cut = {

src/commands/cmd_deselect_mask.cpp

@@ -27,14 +27,13 @@
 
 static bool cmd_deselect_mask_enabled(const char *argument)
 {
-  return
-    current_sprite != NULL &&
-    !mask_is_empty(current_sprite->mask);
+  CurrentSprite sprite;
+  return sprite && !mask_is_empty(sprite->mask);
 }
 
 static void cmd_deselect_mask_execute(const char *argument)
 {
-  Sprite *sprite = current_sprite;
+  CurrentSprite sprite;
   Mask *mask;
 
   /* destroy the *deselected* mask */

src/commands/cmd_duplicate_layer.cpp

@@ -33,20 +33,20 @@ static Layer *duplicate_layer();
 
 static bool cmd_duplicate_layer_enabled(const char *argument)
 {
-  return
-    current_sprite != NULL &&
-    current_sprite->layer != NULL;
+  CurrentSprite sprite;
+  return sprite && sprite->layer;
 }
 
 static void cmd_duplicate_layer_execute(const char *argument)
 {
+  CurrentSprite sprite;
   if (duplicate_layer() != NULL)
-    update_screen_for_sprite(current_sprite);
+    update_screen_for_sprite(sprite);
 }
 
 static Layer *duplicate_layer()
 {
-  Sprite *sprite = current_sprite;
+  CurrentSprite sprite;
   Layer *layer_copy;
   char buf[1024];
 

src/commands/cmd_duplicate_sprite.cpp

@@ -22,6 +22,7 @@
 
 #include "jinete/jinete.h"
 
+#include "ase/ui_context.h"
 #include "commands/commands.h"
 #include "core/app.h"
 #include "core/cfg.h"
@@ -31,13 +32,14 @@
 
 static bool cmd_duplicate_sprite_enabled(const char *argument)
 {
-  return current_sprite != NULL;
+  CurrentSprite sprite;
+  return sprite;
 }
 
 static void cmd_duplicate_sprite_execute(const char *argument)
 {
   JWidget window, src_name, dst_name, flatten;
-  Sprite *sprite = current_sprite;
+  CurrentSprite sprite;
   char buf[1024];
 
   /* load the window widget */
@@ -74,9 +76,11 @@ static void cmd_duplicate_sprite_execute(const char *argument)
     if (sprite_copy != NULL) {
       sprite_set_filename(sprite_copy, jwidget_get_text(dst_name));
 
-      sprite_mount(sprite_copy);
-      set_current_sprite(sprite_copy);
-      sprite_show(sprite_copy);
+      UIContext* context = UIContext::instance();
+
+      context->add_sprite(sprite_copy);
+      context->set_current_sprite(sprite_copy);
+      context->show_sprite(sprite_copy);
     }
   }
 

src/commands/cmd_exit.cpp

@@ -20,6 +20,7 @@
 
 #include "jinete/jinete.h"
 
+#include "ase/ui_context.h"
 #include "commands/commands.h"
 #include "core/app.h"
 #include "modules/sprites.h"
@@ -27,7 +28,8 @@
 
 static void cmd_exit_execute(const char *argument)
 {
-  Sprite *sprite = get_first_sprite();
+  UIContext* context = UIContext::instance();
+  Sprite *sprite = context->get_first_sprite();
 
   while (sprite) {
     // check if this sprite is modified
@@ -37,7 +39,7 @@ static void cmd_exit_execute(const char *argument)
       }
       break;
     }
-    sprite = get_next_sprite(sprite);
+    sprite = context->get_next_sprite(sprite);
   }
 
   /* close the window */

src/commands/cmd_film_editor.cpp

@@ -26,7 +26,8 @@
 
 static bool cmd_film_editor_enabled(const char *argument)
 {
-  return current_sprite != NULL;
+  CurrentSprite sprite;
+  return sprite;
 }
 
 static void cmd_film_editor_execute(const char *argument)

src/commands/cmd_flatten_layers.cpp

@@ -27,12 +27,13 @@
 
 static bool cmd_flatten_layers_enabled(const char *argument)
 {
-  return current_sprite != NULL;
+  CurrentSprite sprite;
+  return sprite;
 }
 
 static void cmd_flatten_layers_execute(const char *argument)
 {
-  Sprite *sprite = current_sprite;
+  CurrentSprite sprite;
 
   if (undo_is_enabled(sprite->undo))
     undo_set_label(sprite->undo, "Flatten Layers");

src/commands/cmd_flip.cpp

@@ -36,7 +36,8 @@ static void do_flip(int horz);
 
 static bool cmd_flip_horizontal_enabled(const char *argument)
 {
-  return current_sprite != NULL;
+  CurrentSprite sprite;
+  return sprite;
 }
 
 static void cmd_flip_horizontal_execute(const char *argument)
@@ -50,7 +51,8 @@ static void cmd_flip_horizontal_execute(const char *argument)
 
 static bool cmd_flip_vertical_enabled(const char *argument)
 {
-  return current_sprite != NULL;
+  CurrentSprite sprite;
+  return sprite;
 }
 
 static void cmd_flip_vertical_execute(const char *argument)
@@ -63,7 +65,7 @@ static void cmd_flip_vertical_execute(const char *argument)
 
 static void do_flip(int horz)
 {
-  Sprite *sprite = current_sprite;
+  CurrentSprite sprite;
   Image *image, *area;
   int x1, y1, x2, y2;
   int x, y;
@@ -108,7 +110,7 @@ static void do_flip(int horz)
 		     !horz? y2-y: y1+y,
 		     image_getpixel(area, x, y));
   image_free(area);
-  update_screen_for_sprite(current_sprite);
+  update_screen_for_sprite(sprite);
 }
 
 Command cmd_flip_horizontal = {

src/commands/cmd_frame_properties.cpp

@@ -30,19 +30,21 @@ void dialogs_frame_length(int sprite_frame);
 
 static bool cmd_frame_properties_enabled(const char *argument)
 {
-  return current_sprite != NULL;
+  CurrentSprite sprite;
+  return sprite;
 }
 
 static void cmd_frame_properties_execute(const char *argument)
 {
-  dialogs_frame_length(current_sprite->frame);
+  CurrentSprite sprite;
+  dialogs_frame_length(sprite->frame);
 }
 
 /* if sprite_frame < 0, set the frame length of all frames */
 void dialogs_frame_length(int sprite_frame)
 {
   JWidget window, frame, frlen, ok;
-  Sprite* sprite = current_sprite;
+  CurrentSprite sprite;
   char buf[64];
 
   window = load_widget("frlen.jid", "frame_duration");

src/commands/cmd_goto_frame.cpp

@@ -31,14 +31,16 @@
 
 static bool cmd_goto_first_frame_enabled(const char *argument)
 {
-  return current_sprite != NULL;
+  CurrentSprite sprite;
+  return sprite != NULL;
 }
 
 static void cmd_goto_first_frame_execute(const char *argument)
 {
-  current_sprite->frame = 0;
+  CurrentSprite sprite;
+  sprite->frame = 0;
 
-  update_screen_for_sprite(current_sprite);
+  update_screen_for_sprite(sprite);
   editor_update_statusbar_for_standby(current_editor);
 }
 
@@ -48,17 +50,20 @@ static void cmd_goto_first_frame_execute(const char *argument)
 
 static bool cmd_goto_previous_frame_enabled(const char *argument)
 {
-  return current_sprite != NULL;
+  CurrentSprite sprite;
+  return sprite != NULL;
 }
 
 static void cmd_goto_previous_frame_execute(const char *argument)
 {
-  if (current_sprite->frame > 0)
-    current_sprite->frame--;
-  else
-    current_sprite->frame = current_sprite->frames-1;
+  CurrentSprite sprite;
 
-  update_screen_for_sprite(current_sprite);
+  if (sprite->frame > 0)
+    sprite->frame--;
+  else
+    sprite->frame = sprite->frames-1;
+
+  update_screen_for_sprite(sprite);
   editor_update_statusbar_for_standby(current_editor);
 }
 
@@ -68,17 +73,20 @@ static void cmd_goto_previous_frame_execute(const char *argument)
 
 static bool cmd_goto_next_frame_enabled(const char *argument)
 {
-  return current_sprite != NULL;
+  CurrentSprite sprite;
+  return sprite != NULL;
 }
 
 static void cmd_goto_next_frame_execute(const char *argument)
 {
-  if (current_sprite->frame < current_sprite->frames-1)
-    current_sprite->frame++;
-  else
-    current_sprite->frame = 0;
+  CurrentSprite sprite;
 
-  update_screen_for_sprite(current_sprite);
+  if (sprite->frame < sprite->frames-1)
+    sprite->frame++;
+  else
+    sprite->frame = 0;
+
+  update_screen_for_sprite(sprite);
   editor_update_statusbar_for_standby(current_editor);
 }
 
@@ -88,14 +96,16 @@ static void cmd_goto_next_frame_execute(const char *argument)
 
 static bool cmd_goto_last_frame_enabled(const char *argument)
 {
-  return current_sprite != NULL;
+  CurrentSprite sprite;
+  return sprite != NULL;
 }
 
 static void cmd_goto_last_frame_execute(const char *argument)
 {
-  current_sprite->frame = current_sprite->frames-1;
+  CurrentSprite sprite;
+  sprite->frame = sprite->frames-1;
 
-  update_screen_for_sprite(current_sprite);
+  update_screen_for_sprite(sprite);
   editor_update_statusbar_for_standby(current_editor);
 }
 

src/commands/cmd_goto_layer.cpp

@@ -34,26 +34,28 @@
 
 static bool cmd_goto_previous_layer_enabled(const char *argument)
 {
-  return current_sprite != NULL;
+  CurrentSprite sprite;
+  return sprite != NULL;
 }
 
 static void cmd_goto_previous_layer_execute(const char *argument)
 {
-  int i = sprite_layer2index(current_sprite, current_sprite->layer);
+  CurrentSprite sprite;
+  int i = sprite_layer2index(sprite, sprite->layer);
   
   if (i > 0)
     i--;
   else
-    i = sprite_count_layers(current_sprite)-1;
+    i = sprite_count_layers(sprite)-1;
 
-  current_sprite->layer = sprite_index2layer(current_sprite, i);
+  sprite->layer = sprite_index2layer(sprite, i);
 
-  update_screen_for_sprite(current_sprite);
+  update_screen_for_sprite(sprite);
   editor_update_statusbar_for_standby(current_editor);
 
   statusbar_show_tip(app_get_statusbar(), 1000,
 		     _("Layer `%s' selected"),
-		     current_sprite->layer->name);
+		     sprite->layer->name);
 }
 
 /* ======================== */
@@ -62,26 +64,28 @@ static void cmd_goto_previous_layer_execute(const char *argument)
 
 static bool cmd_goto_next_layer_enabled(const char *argument)
 {
-  return current_sprite != NULL;
+  CurrentSprite sprite;
+  return sprite != NULL;
 }
 
 static void cmd_goto_next_layer_execute(const char *argument)
 {
-  int i = sprite_layer2index(current_sprite, current_sprite->layer);
+  CurrentSprite sprite;
+  int i = sprite_layer2index(sprite, sprite->layer);
 
-  if (i < sprite_count_layers(current_sprite)-1)
+  if (i < sprite_count_layers(sprite)-1)
     i++;
   else
     i = 0;
 
-  current_sprite->layer = sprite_index2layer(current_sprite, i);
+  sprite->layer = sprite_index2layer(sprite, i);
 
-  update_screen_for_sprite(current_sprite);
+  update_screen_for_sprite(sprite);
   editor_update_statusbar_for_standby(current_editor);
 
   statusbar_show_tip(app_get_statusbar(), 1000,
 		     _("Layer `%s' selected"),
-		     current_sprite->layer->name);
+		     sprite->layer->name);
 }
 
 Command cmd_goto_previous_layer = {

src/commands/cmd_invert_mask.cpp

@@ -28,12 +28,13 @@
 
 static bool cmd_invert_mask_enabled(const char *argument)
 {
-  return current_sprite != NULL;
+  CurrentSprite sprite;
+  return sprite;
 }
 
 static void cmd_invert_mask_execute(const char *argument)
 {
-  Sprite *sprite = current_sprite;
+  CurrentSprite sprite;
   Mask *mask;
 
   /* change the selection */

src/commands/cmd_layer_from_background.cpp

@@ -31,18 +31,19 @@
 
 static bool cmd_layer_from_background_enabled(const char *argument)
 {
+  CurrentSprite sprite;
   return
-    current_sprite != NULL &&
-    current_sprite->layer != NULL &&
-    layer_is_image(current_sprite->layer) &&
-    layer_is_readable(current_sprite->layer) &&
-    layer_is_writable(current_sprite->layer) &&
-    layer_is_background(current_sprite->layer);
+    sprite &&
+    sprite->layer &&
+    layer_is_image(sprite->layer) &&
+    layer_is_readable(sprite->layer) &&
+    layer_is_writable(sprite->layer) &&
+    layer_is_background(sprite->layer);
 }
 
 static void cmd_layer_from_background_execute(const char *argument)
 {
-  Sprite *sprite = current_sprite;
+  CurrentSprite sprite;
 
   if (undo_is_enabled(sprite->undo))
     undo_set_label(sprite->undo, "Layer from Background");

src/commands/cmd_layer_properties.cpp

@@ -29,16 +29,15 @@
 
 static bool cmd_layer_properties_enabled(const char *argument)
 {
-  return
-    current_sprite != NULL &&
-    current_sprite->layer != NULL;
+  CurrentSprite sprite;
+  return sprite && sprite->layer;
 }
 
 static void cmd_layer_properties_execute(const char *argument)
 {
   JWidget window, box1, box2, box3, label_name, entry_name;
   JWidget button_ok, button_cancel, label_bm, view_bm, list_bm;
-  Sprite *sprite = current_sprite;
+  CurrentSprite sprite;
   Layer *layer = sprite->layer;
 
   window = jwindow_new(_("Layer Properties"));

src/commands/cmd_load_mask.cpp

@@ -31,13 +31,13 @@
 
 static bool cmd_load_mask_enabled(const char *argument)
 {
-  return current_sprite != NULL;
+  CurrentSprite sprite;
+  return sprite;
 }
 
 static void cmd_load_mask_execute(const char *argument)
 {
-  /* get current sprite */
-  Sprite *sprite = current_sprite;
+  CurrentSprite sprite;
   jstring filename = ase_file_selector(_("Load .msk File"), "", "msk");
   if (!filename.empty()) {
     Mask *mask = load_msk_file(filename.c_str());

src/commands/cmd_mask_all.cpp

@@ -27,12 +27,13 @@
 
 static bool cmd_mask_all_enabled(const char *argument)
 {
-  return current_sprite != NULL;
+  CurrentSprite sprite;
+  return sprite;
 }
   
 static void cmd_mask_all_execute(const char *argument)
 {
-  Sprite *sprite = current_sprite;
+  CurrentSprite sprite;
 
   /* undo */
   if (undo_is_enabled(sprite->undo)) {

src/commands/cmd_mask_by_color.cpp

@@ -26,7 +26,8 @@
 
 static bool cmd_mask_by_color_enabled(const char *argument)
 {
-  return current_sprite != NULL;
+  CurrentSprite sprite;
+  return sprite;
 }
 
 static void cmd_mask_by_color_execute(const char *argument)

src/commands/cmd_merge_down_layer.cpp

@@ -33,18 +33,15 @@
 
 static bool cmd_merge_down_layer_enabled(const char *argument)
 {
-  Layer *src_layer, *dst_layer;
-  Sprite *sprite;
-
-  sprite = current_sprite;
+  CurrentSprite sprite;
   if (!sprite)
     return FALSE;
 
-  src_layer = sprite->layer;
+  Layer *src_layer = sprite->layer;
   if (!src_layer || !layer_is_image(src_layer))
     return FALSE;
 
-  dst_layer = layer_get_prev(sprite->layer);
+  Layer* dst_layer = layer_get_prev(sprite->layer);
   if (!dst_layer || !layer_is_image(dst_layer))
     return FALSE;
 
@@ -53,7 +50,7 @@ static bool cmd_merge_down_layer_enabled(const char *argument)
 
 static void cmd_merge_down_layer_execute(const char *argument)
 {
-  Sprite *sprite = current_sprite;
+  CurrentSprite sprite;
   Layer *src_layer, *dst_layer;
   Cel *src_cel, *dst_cel;
   Image *src_image, *dst_image;

src/commands/cmd_new_file.cpp

@@ -24,6 +24,7 @@
 
 #include "jinete/jinete.h"
 
+#include "ase/ui_context.h"
 #include "commands/commands.h"
 #include "console/console.h"
 #include "core/app.h"
@@ -150,7 +151,8 @@ static void cmd_new_file_execute(const char *argument)
 	undo_enable(sprite->undo);
 
 	/* show the sprite to the user */
-	sprite_show(sprite);
+	UIContext* context = UIContext::instance();
+	context->show_sprite(sprite);
       }
     }
   }

src/commands/cmd_new_frame.cpp

@@ -38,17 +38,18 @@
 
 static bool cmd_new_frame_enabled(const char *argument)
 {
+  CurrentSprite sprite;
   return
-    current_sprite &&
-    current_sprite->layer &&
-    layer_is_readable(current_sprite->layer) &&
-    layer_is_writable(current_sprite->layer) &&
-    layer_is_image(current_sprite->layer);
+    sprite &&
+    sprite->layer &&
+    layer_is_readable(sprite->layer) &&
+    layer_is_writable(sprite->layer) &&
+    layer_is_image(sprite->layer);
 }
 
 static void cmd_new_frame_execute(const char *argument)
 {
-  Sprite* sprite = current_sprite;
+  CurrentSprite sprite;
   {
     Undoable undoable(sprite, "New Frame");
     undoable.new_frame();

src/commands/cmd_new_layer.cpp

@@ -31,13 +31,14 @@
 
 static bool cmd_new_layer_enabled(const char *argument)
 {
-  return current_sprite != NULL;
+  CurrentSprite sprite;
+  return sprite;
 }
 
 static void cmd_new_layer_execute(const char *argument)
 {
   JWidget window, name_widget;
-  Sprite* sprite = current_sprite; /* get current sprite */
+  CurrentSprite sprite;
 
   /* load the window widget */
   window = load_widget("newlay.jid", "new_layer");

src/commands/cmd_new_layer_set.cpp

@@ -30,15 +30,16 @@
 
 static bool cmd_new_layer_set_enabled(const char *argument)
 {
-  return current_sprite != NULL;
+  CurrentSprite sprite;
+  return sprite;
 }
 
 static void cmd_new_layer_set_execute(const char *argument)
 {
   JWidget window;
-  Sprite *sprite = current_sprite; /* get current sprite */
+  CurrentSprite sprite;
 
-  /* load the window widget */
+  // load the window widget
   window = load_widget("newlay.jid", "new_layer_set");
   if (!window)
     return;

src/commands/cmd_open_file.cpp

@@ -23,6 +23,7 @@
 
 #include "jinete/jinete.h"
 
+#include "ase/ui_context.h"
 #include "commands/commands.h"
 #include "console/console.h"
 #include "core/app.h"
@@ -56,7 +57,7 @@ static void openfile_bg(void *fop_data)
   fop_operate(fop);
 
   if (fop_is_stop(fop) && fop->sprite) {
-    sprite_free(fop->sprite);
+    delete fop->sprite;
     fop->sprite = NULL;
   }
 
@@ -197,9 +198,11 @@ static void cmd_open_file_execute(const char *argument)
 	  else {
 	    Sprite *sprite = fop->sprite;
 	    if (sprite) {
+	      UIContext* context = UIContext::instance();
+
 	      recent_file(fop->filename);
-	      sprite_mount(sprite);
-	      sprite_show(sprite);
+	      context->add_sprite(sprite);
+	      context->show_sprite(sprite);
 	    }
 	    /* if the sprite isn't NULL and the file-operation wasn't
 	       stopped by the user...  */

src/commands/cmd_palette_editor.cpp

@@ -32,7 +32,6 @@
 #include "modules/gui.h"
 #include "modules/palettes.h"
 #include "modules/sprites.h"
-#include "modules/sprites.h"
 #include "raster/image.h"
 #include "raster/palette.h"
 #include "raster/sprite.h"
@@ -75,8 +74,9 @@ static void cmd_palette_editor_execute(const char *argument)
   JWidget button_ramp, button_quantize;
   int frame, columns;
   Palette *palette = NULL;
-  int imgtype = current_sprite ? current_sprite->imgtype: IMAGE_INDEXED;
-  int frame_bak = current_sprite ? current_sprite->frame : 0;
+  CurrentSprite sprite;
+  int imgtype = sprite ? sprite->imgtype: IMAGE_INDEXED;
+  int frame_bak = sprite ? sprite->frame : 0;
   bool all_frames_same_palette = TRUE;
 
   if (imgtype == IMAGE_GRAYSCALE) {
@@ -114,16 +114,16 @@ static void cmd_palette_editor_execute(const char *argument)
   }
 
   /* create current_sprite->frames palettes */
-  if (current_sprite) {
-    palettes = (Palette **)jmalloc(sizeof(Palette *) * current_sprite->frames);
+  if (sprite) {
+    palettes = (Palette **)jmalloc(sizeof(Palette *) * sprite->frames);
     if (!palettes) {
       jalert(_("Error<<Not enough memory||&OK"));
       return;
     }
-    for (frame=0; frame<current_sprite->frames; ++frame) {
+    for (frame=0; frame<sprite->frames; ++frame) {
       palettes[frame] = palette_new(frame, MAX_PALETTE_COLORS);
       palette_copy_colors(palettes[frame],
-			  sprite_get_palette(current_sprite, frame));
+			  sprite_get_palette(sprite, frame));
 
       if (frame > 0 &&
 	  palette_count_diff(palettes[frame-1], palettes[frame], NULL, NULL) > 0) {
@@ -167,9 +167,9 @@ static void cmd_palette_editor_execute(const char *argument)
     jwidget_deselect(check_all_frames);
   
   /* frame */
-  if (current_sprite) {
-    jslider_set_range(slider_frame, 0, current_sprite->frames-1);
-    jslider_set_value(slider_frame, current_sprite->frame);
+  if (sprite) {
+    jslider_set_range(slider_frame, 0, sprite->frames-1);
+    jslider_set_value(slider_frame, sprite->frame);
     
     if (jwidget_is_selected(check_all_frames))
       jwidget_disable(slider_frame);
@@ -207,8 +207,8 @@ static void cmd_palette_editor_execute(const char *argument)
 
   /* check the killer widget */
   if (jwindow_get_killer(window) == button_ok) {
-    if (current_sprite) {
-      sprite_reset_palettes(current_sprite);
+    if (sprite) {
+      sprite_reset_palettes(sprite);
 
       /* one palette */
       if (jwidget_is_selected(check_all_frames)) {
@@ -216,7 +216,7 @@ static void cmd_palette_editor_execute(const char *argument)
 	palette_copy_colors(palettes[0],
 			    get_current_palette());
 
-	sprite_set_palette(current_sprite, palettes[0], TRUE);
+	sprite_set_palette(sprite, palettes[0], TRUE);
       }
       /* various palettes */
       else {
@@ -224,11 +224,11 @@ static void cmd_palette_editor_execute(const char *argument)
 	palette_copy_colors(palettes[frame],
 			    get_current_palette());
 
-	for (frame=0; frame<current_sprite->frames; ++frame) {
+	for (frame=0; frame<sprite->frames; ++frame) {
 	  if (frame == 0 ||
 	      palette_count_diff(palettes[frame],
 				 palettes[frame-1], NULL, NULL) > 0) {
-	    sprite_set_palette(current_sprite, palettes[frame], TRUE);
+	    sprite_set_palette(sprite, palettes[frame], TRUE);
 	  }
 	}
       }
@@ -242,9 +242,9 @@ static void cmd_palette_editor_execute(const char *argument)
   /* cancel or ESC */
   else {
     /* restore the system palette */
-    if (current_sprite) {
-      current_sprite->frame = frame_bak;
-      set_current_palette(sprite_get_palette(current_sprite, frame_bak), TRUE);
+    if (sprite) {
+      sprite->frame = frame_bak;
+      set_current_palette(sprite_get_palette(sprite, frame_bak), TRUE);
     }
     else {
       set_current_palette(NULL, TRUE);
@@ -264,9 +264,9 @@ static void cmd_palette_editor_execute(const char *argument)
   jwidget_free(window);
 
   if (palettes) {
-    assert(current_sprite);
+    assert(sprite);
 
-    for (frame=0; frame<current_sprite->frames; ++frame)
+    for (frame=0; frame<sprite->frames; ++frame)
       palette_free(palettes[frame]);
 
     jfree(palettes);
@@ -354,6 +354,7 @@ static void ramp_command(JWidget widget)
 
 static void quantize_command(JWidget widget)
 {
+  CurrentSprite sprite;
   Palette *palette = palette_new(0, MAX_PALETTE_COLORS);
   bool array[256];
 
@@ -361,8 +362,8 @@ static void quantize_command(JWidget widget)
   palette_copy_colors(palette,
 		      paledit_get_palette(palette_editor));
 
-  if (current_sprite && current_sprite->imgtype == IMAGE_RGB) {
-    sprite_quantize_ex(current_sprite, palette);
+  if (sprite && sprite->imgtype == IMAGE_RGB) {
+    sprite_quantize_ex(sprite, palette);
   }
   else {
     jalert(_("Error<<You can use this command only for RGB sprites||&OK"));
@@ -436,12 +437,13 @@ static bool slider_columns_change_hook(JWidget widget, void *data)
 
 static bool slider_frame_change_hook(JWidget widget, void *data)
 {
-  int old_frame = current_sprite->frame;
+  CurrentSprite sprite;
+  int old_frame = sprite->frame;
   int new_frame = jslider_get_value(slider_frame);
 
   palette_copy_colors(palettes[old_frame],
 		      get_current_palette());
-  current_sprite->frame = new_frame;
+  sprite->frame = new_frame;
   set_new_palette(palettes[new_frame]);
 
   return FALSE;
@@ -449,6 +451,7 @@ static bool slider_frame_change_hook(JWidget widget, void *data)
 
 static bool check_all_frames_change_hook(JWidget widget, void *data)
 {
+  CurrentSprite sprite;
   int frame = jslider_get_value(slider_frame);
 
   palette_copy_colors(palettes[frame],
@@ -458,7 +461,7 @@ static bool check_all_frames_change_hook(JWidget widget, void *data)
     bool has_two_or_more_palettes = FALSE;
     int c;
 
-    for (c=1; c<current_sprite->frames; c++) {
+    for (c=1; c<sprite->frames; c++) {
       if (palette_count_diff(palettes[c-1], palettes[c], NULL, NULL) > 0) {
 	has_two_or_more_palettes = TRUE;
 	break;

src/commands/cmd_paste.cpp

@@ -26,17 +26,19 @@
 
 static bool cmd_paste_enabled(const char *argument)
 {
-  Sprite *sprite = current_sprite;
+  CurrentSprite sprite;
 
   return (sprite && clipboard::can_paste());
 }
 
 static void cmd_paste_execute(const char *argument)
 {
-  if (undo_is_enabled(current_sprite->undo))
-    undo_set_label(current_sprite->undo, "Paste");
+  CurrentSprite sprite;
 
-  clipboard::paste(current_sprite);
+  if (undo_is_enabled(sprite->undo))
+    undo_set_label(sprite->undo, "Paste");
+
+  clipboard::paste(sprite);
 }
 
 Command cmd_paste = {

src/commands/cmd_play_animation.cpp

@@ -43,12 +43,13 @@ END_OF_STATIC_FUNCTION(speed_timer_callback);
 
 static bool cmd_play_animation_enabled(const char *argument)
 {
-  return current_sprite != NULL;
+  CurrentSprite sprite;
+  return sprite;
 }
 
 static void cmd_play_animation_execute(const char *argument)
 {
-  Sprite *sprite = current_sprite;
+  CurrentSprite sprite;
   int old_frame, msecs;
   bool done = FALSE;
   bool onionskin = get_onionskin();

src/commands/cmd_preview.cpp

@@ -43,7 +43,8 @@ static void preview_sprite(int flags);
 
 static bool cmd_preview_enabled(const char *argument)
 {
-  return current_sprite != NULL;
+  CurrentSprite sprite;
+  return sprite;
 }
 
 /* ======================== */

src/commands/cmd_redo.cpp

@@ -28,18 +28,21 @@
 
 static bool cmd_redo_enabled(const char *argument)
 {
-  return current_sprite != NULL && undo_can_redo(current_sprite->undo);
+  CurrentSprite sprite;
+  return sprite != NULL && undo_can_redo(sprite->undo);
 }
 
 static void cmd_redo_execute(const char *argument)
 {
+  CurrentSprite sprite;
+
   statusbar_show_tip(app_get_statusbar(), 1000,
 		     _("Redid %s"),
-		     undo_get_next_redo_label(current_sprite->undo));
+		     undo_get_next_redo_label(sprite->undo));
 
-  undo_do_redo(current_sprite->undo);
-  sprite_generate_mask_boundaries(current_sprite);
-  update_screen_for_sprite(current_sprite);
+  undo_do_redo(sprite->undo);
+  sprite_generate_mask_boundaries(sprite);
+  update_screen_for_sprite(sprite);
 }
 
 Command cmd_redo = {

src/commands/cmd_remove_cel.cpp

@@ -28,18 +28,19 @@
 
 static bool cmd_remove_cel_enabled(const char *argument)
 {
+  CurrentSprite sprite;
   return
-    current_sprite &&
-    current_sprite->layer &&
-    layer_is_readable(current_sprite->layer) &&
-    layer_is_writable(current_sprite->layer) &&
-    layer_is_image(current_sprite->layer) &&
-    layer_get_cel(current_sprite->layer, current_sprite->frame);
+    sprite &&
+    sprite->layer &&
+    layer_is_readable(sprite->layer) &&
+    layer_is_writable(sprite->layer) &&
+    layer_is_image(sprite->layer) &&
+    layer_get_cel(sprite->layer, sprite->frame);
 }
 
 static void cmd_remove_cel_execute(const char *argument)
 {
-  Sprite* sprite = current_sprite;
+  CurrentSprite sprite;
   Cel* cel = layer_get_cel(sprite->layer, sprite->frame);
   {
     Undoable undoable(sprite, "Remove Cel");

src/commands/cmd_remove_frame.cpp

@@ -28,14 +28,15 @@
 
 static bool cmd_remove_frame_enabled(const char *argument)
 {
+  CurrentSprite sprite;
   return
-    current_sprite != NULL &&
-    current_sprite->frames > 1;
+    sprite != NULL &&
+    sprite->frames > 1;
 }
 
 static void cmd_remove_frame_execute(const char *argument)
 {
-  Sprite *sprite = current_sprite;
+  CurrentSprite sprite;
   {
     Undoable undoable(sprite, "Remove Frame");
     undoable.remove_frame(sprite->frame);

src/commands/cmd_remove_layer.cpp

@@ -27,14 +27,15 @@
 
 static bool cmd_remove_layer_enabled(const char *argument)
 {
+  CurrentSprite sprite;
   return
-    current_sprite != NULL &&
-    current_sprite->layer != NULL;
+    sprite != NULL &&
+    sprite->layer != NULL;
 }
 
 static void cmd_remove_layer_execute(const char *argument)
 {
-  Sprite* sprite = current_sprite;
+  CurrentSprite sprite;
   {
     Undoable undoable(sprite, "Remove Layer");
     undoable.remove_layer(sprite->layer);

src/commands/cmd_reselect_mask.cpp

@@ -27,14 +27,15 @@
 
 static bool cmd_reselect_mask_enabled(const char *argument)
 {
+  CurrentSprite sprite;
   return
-    current_sprite != NULL &&
-    sprite_request_mask(current_sprite, "*deselected*") != NULL;
+    sprite != NULL &&
+    sprite_request_mask(sprite, "*deselected*") != NULL;
 }
 
 static void cmd_reselect_mask_execute(const char *argument)
 {
-  Sprite *sprite = current_sprite;
+  CurrentSprite sprite;
   Mask *mask;
 
   /* request *deselected* mask */

src/commands/cmd_save_file.cpp

@@ -145,7 +145,7 @@ static void save_sprite_in_background(Sprite* sprite, bool mark_as_saved)
 
 static void save_as_dialog(const char* dlg_title, bool mark_as_saved)
 {
-  Sprite *sprite = current_sprite;
+  CurrentSprite sprite;
   char exts[4096];
   jstring filename;
   jstring newfilename;
@@ -200,7 +200,8 @@ static void save_as_dialog(const char* dlg_title, bool mark_as_saved)
  */
 static bool cmd_save_file_enabled(const char *argument)
 {
-  return current_sprite != NULL;
+  CurrentSprite sprite;
+  return sprite;
 }
 
 /**
@@ -210,7 +211,7 @@ static bool cmd_save_file_enabled(const char *argument)
  */
 static void cmd_save_file_execute(const char *argument)
 {
-  Sprite *sprite = current_sprite;
+  CurrentSprite sprite;
 
   /* if the sprite is associated to a file in the file-system, we can
      save it directly without user interaction */
@@ -231,7 +232,8 @@ static void cmd_save_file_execute(const char *argument)
 
 static bool cmd_save_file_as_enabled(const char *argument)
 {
-  return current_sprite != NULL;
+  CurrentSprite sprite;
+  return sprite;
 }
 
 static void cmd_save_file_as_execute(const char *argument)
@@ -245,12 +247,13 @@ static void cmd_save_file_as_execute(const char *argument)
 
 static bool cmd_save_file_copy_as_enabled(const char *argument)
 {
-  return current_sprite != NULL;
+  CurrentSprite sprite;
+  return sprite;
 }
 
 static void cmd_save_file_copy_as_execute(const char *argument)
 {
-  Sprite *sprite = current_sprite;
+  CurrentSprite sprite;
   jstring old_filename = sprite->filename;
 
   // show "Save As" dialog

src/commands/cmd_save_mask.cpp

@@ -31,17 +31,17 @@
 
 static bool cmd_save_mask_enabled(const char *argument)
 {
-  if (!current_sprite)
-    return FALSE;
+  CurrentSprite sprite;
+  if (!sprite)
+    return false;
   else
-    return (current_sprite->mask &&
-	    current_sprite->mask->bitmap) ? TRUE: FALSE;
+    return (sprite->mask &&
+	    sprite->mask->bitmap) ? true: false;
 }
 
 static void cmd_save_mask_execute(const char *argument)
 {
-  /* get current sprite */
-  Sprite *sprite = current_sprite;
+  CurrentSprite sprite;
   jstring filename = "default.msk";
   int ret;
 

src/commands/cmd_screen_shot.cpp

@@ -100,7 +100,7 @@ static void cmd_screen_shot_execute(const char *argument)
     sprite_save(sprite);
 
     /* destroy the sprite */
-    sprite_free(sprite);
+    delete sprite;
   }
 
   /* destroy the bitmap */

src/commands/cmd_select_file.cpp

@@ -24,6 +24,7 @@
 
 #include "jinete/jinete.h"
 
+#include "ase/ui_context.h"
 #include "commands/commands.h"
 #include "core/app.h"
 #include "modules/sprites.h"
@@ -44,6 +45,8 @@ static bool cmd_select_file_enabled(const char *argument)
 
 static bool cmd_select_file_checked(const char *argument)
 {
+  CurrentSprite current_sprite;
+
   if (argument) {
     int sprite_id = ustrtol(argument, NULL, 10);
     GfxObj *gfxobj = gfxobj_find(sprite_id);
@@ -57,15 +60,17 @@ static bool cmd_select_file_checked(const char *argument)
 
 static void cmd_select_file_execute(const char *argument)
 {
+  UIContext* context = UIContext::instance();
+
   if (argument) {
     int sprite_id = ustrtol(argument, NULL, 10);
-    GfxObj *gfxobj = gfxobj_find(sprite_id);
+    GfxObj* gfxobj = gfxobj_find(sprite_id);
     assert(gfxobj != NULL);
 
-    sprite_show((Sprite *)gfxobj);
+    context->show_sprite((Sprite*)gfxobj);
   }
   else {
-    sprite_show(NULL);
+    context->show_sprite(NULL);
   }
 }
 

src/commands/cmd_sprite_properties.cpp

@@ -36,13 +36,14 @@ void dialogs_frame_length(int sprite_frpos);
 
 static bool cmd_sprite_properties_enabled(const char *argument)
 {
-  return current_sprite != NULL;
+  CurrentSprite sprite;
+  return sprite;
 }
 
 static void cmd_sprite_properties_execute(const char *argument)
 {
   JWidget window, killer, name, type, size, frames, speed, ok;
-  Sprite *sprite = current_sprite;
+  CurrentSprite sprite;
   jstring imgtype_text;
   char buf[256];
 

src/commands/cmd_sprite_size.cpp

@@ -46,6 +46,7 @@ class SpriteSizeJob : public Job
 public:
 
   SpriteSizeJob(Sprite* sprite, int new_width, int new_height, ResizeMethod resize_method)
+    : Job("Sprite Size")
   {
     m_sprite = sprite;
     m_new_width = new_width;
@@ -122,13 +123,16 @@ static bool height_perc_change_hook(JWidget widget, void *data);
 
 static bool cmd_sprite_size_enabled(const char *argument)
 {
-  return current_sprite != NULL;
+  CurrentSprite sprite;
+  return sprite;
 }
 
 static void cmd_sprite_size_execute(const char *argument)
 {
   JWidget window, width_px, height_px, width_perc, height_perc, lock_ratio, method, ok;
-  Sprite* sprite = current_sprite;
+  CurrentSprite sprite;
+  if (!sprite)
+    return;
 
   // load the window widget
   window = load_widget("sprsize.jid", "sprite_size");
@@ -190,6 +194,8 @@ static void cmd_sprite_size_execute(const char *argument)
 
 static bool lock_ratio_change_hook(JWidget widget, void *data)
 {
+  CurrentSprite sprite;
+
   if (widget->selected())
     width_px_change_hook(widget->find_sibling("width_px"), NULL);
 
@@ -198,14 +204,15 @@ static bool lock_ratio_change_hook(JWidget widget, void *data)
 
 static bool width_px_change_hook(JWidget widget, void *data)
 {
+  CurrentSprite sprite;
   int width = widget->text_int();
-  double perc = 100.0 * width / current_sprite->w;
+  double perc = 100.0 * width / sprite->w;
 
   widget->find_sibling("width_perc")->textf(PERC_FORMAT, perc);
 
   if (widget->find_sibling("lock_ratio")->selected()) {
     widget->find_sibling("height_perc")->textf(PERC_FORMAT, perc);
-    widget->find_sibling("height_px")->textf("%d", current_sprite->h * width / current_sprite->w);
+    widget->find_sibling("height_px")->textf("%d", sprite->h * width / sprite->w);
   }
 
   return true;
@@ -213,14 +220,15 @@ static bool width_px_change_hook(JWidget widget, void *data)
 
 static bool height_px_change_hook(JWidget widget, void *data)
 {
+  CurrentSprite sprite;
   int height = widget->text_int();
-  double perc = 100.0 * height / current_sprite->h;
+  double perc = 100.0 * height / sprite->h;
 
   widget->find_sibling("height_perc")->textf(PERC_FORMAT, perc);
 
   if (widget->find_sibling("lock_ratio")->selected()) {
     widget->find_sibling("width_perc")->textf(PERC_FORMAT, perc);
-    widget->find_sibling("width_px")->textf("%d", current_sprite->w * height / current_sprite->h);
+    widget->find_sibling("width_px")->textf("%d", sprite->w * height / sprite->h);
   }
 
   return true;
@@ -228,12 +236,13 @@ static bool height_px_change_hook(JWidget widget, void *data)
 
 static bool width_perc_change_hook(JWidget widget, void *data)
 {
+  CurrentSprite sprite;
   double width = widget->text_double();
 
-  widget->find_sibling("width_px")->textf("%d", (int)(current_sprite->w * width / 100));
+  widget->find_sibling("width_px")->textf("%d", (int)(sprite->w * width / 100));
 
   if (widget->find_sibling("lock_ratio")->selected()) {
-    widget->find_sibling("height_px")->textf("%d", (int)(current_sprite->h * width / 100));
+    widget->find_sibling("height_px")->textf("%d", (int)(sprite->h * width / 100));
     widget->find_sibling("height_perc")->text(widget->text());
   }
 
@@ -242,12 +251,13 @@ static bool width_perc_change_hook(JWidget widget, void *data)
 
 static bool height_perc_change_hook(JWidget widget, void *data)
 {
+  CurrentSprite sprite;
   double height = widget->text_double();
 
-  widget->find_sibling("height_px")->textf("%d", (int)(current_sprite->h * height / 100));
+  widget->find_sibling("height_px")->textf("%d", (int)(sprite->h * height / 100));
 
   if (widget->find_sibling("lock_ratio")->selected()) {
-    widget->find_sibling("width_px")->textf("%d", (int)(current_sprite->w * height / 100));
+    widget->find_sibling("width_px")->textf("%d", (int)(sprite->w * height / 100));
     widget->find_sibling("width_perc")->text(widget->text());
   }
 

src/commands/cmd_undo.cpp

@@ -28,18 +28,21 @@
 
 static bool cmd_undo_enabled(const char *argument)
 {
-  return current_sprite != NULL && undo_can_undo(current_sprite->undo);
+  CurrentSprite sprite;
+  return sprite != NULL && undo_can_undo(sprite->undo);
 }
 
 static void cmd_undo_execute(const char *argument)
 {
+  CurrentSprite sprite;
+
   statusbar_show_tip(app_get_statusbar(), 1000,
 		     _("Undid %s"),
-		     undo_get_next_undo_label(current_sprite->undo));
+		     undo_get_next_undo_label(sprite->undo));
 
-  undo_do_undo(current_sprite->undo);
-  sprite_generate_mask_boundaries(current_sprite);
-  update_screen_for_sprite(current_sprite);
+  undo_do_undo(sprite->undo);
+  sprite_generate_mask_boundaries(sprite);
+  update_screen_for_sprite(sprite);
 }
 
 Command cmd_undo = {

src/commands/fx/cmd_color_curve.cpp

@@ -48,7 +48,8 @@ static void make_preview();
 
 static bool cmd_color_curve_enabled(const char *argument)
 {
-  return current_sprite != NULL;
+  CurrentSprite sprite;
+  return sprite != NULL;
 }
 
 static void cmd_color_curve_execute(const char *argument)
@@ -56,7 +57,7 @@ static void cmd_color_curve_execute(const char *argument)
   JWidget window, button_ok;
   JWidget view_curve, curve_editor;
   JWidget box_target, target_button;
-  Sprite *sprite = current_sprite;
+  CurrentSprite sprite;
   Image *image;
   Effect *effect;
 
@@ -71,7 +72,7 @@ static void cmd_color_curve_execute(const char *argument)
 		 the_curve);
   }
 
-  image = GetImage(current_sprite);
+  image = GetImage(sprite);
   if (!image)
     return;
 

src/commands/fx/cmd_convolution_matrix.cpp

@@ -70,7 +70,8 @@ static void make_preview();
 
 static bool cmd_convolution_matrix_enabled(const char *argument)
 {
-  return current_sprite != NULL;
+  CurrentSprite sprite;
+  return sprite != NULL;
 }
 
 static void cmd_convolution_matrix_execute(const char *argument)
@@ -79,11 +80,11 @@ static void cmd_convolution_matrix_execute(const char *argument)
   JWidget view_convmatr, list_convmatr;
   JWidget box_target;
   JWidget reload, generate;
-  Sprite *sprite = current_sprite;
+  CurrentSprite sprite;
   Image *image;
   Effect *effect;
 
-  image = GetImage(current_sprite);
+  image = GetImage(sprite);
   if (!image)
     return;
 

src/commands/fx/cmd_despeckle.cpp

@@ -57,17 +57,19 @@ static void make_preview();
 
 static bool cmd_despeckle_enabled(const char *argument)
 {
-  return current_sprite != NULL;
+  CurrentSprite sprite;
+  return sprite;
 }
 
 static void cmd_despeckle_execute(const char *argument)
 {
   JWidget window, box_target, target_button, button_ok;
+  CurrentSprite sprite;
   Image *image;
   Effect *effect;
   char buf[32];
 
-  image = GetImage(current_sprite);
+  image = GetImage(sprite);
   if (!image)
     return;
 
@@ -86,7 +88,7 @@ static void cmd_despeckle_execute(const char *argument)
     return;
   }
 
-  effect = effect_new(current_sprite, "median");
+  effect = effect_new(sprite, "median");
   if (!effect) {
     console_printf(_("Error creating the effect applicator for this sprite\n"));
     jwidget_free(window);
@@ -98,7 +100,7 @@ static void cmd_despeckle_execute(const char *argument)
 
   preview = preview_new(effect);
 
-  target_button = target_button_new(current_sprite->imgtype, TRUE);
+  target_button = target_button_new(sprite->imgtype, TRUE);
   target_button_set_target(target_button, effect->target);
 
   sprintf(buf, "%d", get_config_int("Median", "Width", 3));
@@ -141,7 +143,7 @@ static void cmd_despeckle_execute(const char *argument)
   effect_free(effect);
 
   /* update editors */
-  update_screen_for_sprite(current_sprite);
+  update_screen_for_sprite(sprite);
 
   /* save window configuration */
   save_window_pos(window, "Median");

src/commands/fx/cmd_invert_color.cpp

@@ -51,17 +51,18 @@ static void make_preview();
 
 static bool cmd_invert_color_enabled(const char *argument)
 {
-  return current_sprite != NULL;
+  CurrentSprite sprite;
+  return sprite;
 }
 
 static void cmd_invert_color_execute(const char *argument)
 {
   JWidget window, box_target, target_button, button_ok;
-  Sprite *sprite = current_sprite;
+  CurrentSprite sprite;
   Image *image;
   Effect *effect;
 
-  image = GetImage(current_sprite);
+  image = GetImage(sprite);
   if (!image)
     return;
 

src/commands/fx/cmd_replace_color.cpp

@@ -54,7 +54,8 @@ static void make_preview();
 
 static bool cmd_replace_color_enabled(const char *argument)
 {
-  return is_current_sprite_not_locked();
+  CurrentSprite sprite;
+  return sprite;
 }
 
 static void cmd_replace_color_execute(const char *argument)
@@ -65,13 +66,12 @@ static void cmd_replace_color_execute(const char *argument)
   JWidget button_ok;
   Image *image;
   Effect *effect;
-  Sprite *sprite;
 
-  sprite = lock_current_sprite();
+  CurrentSprite sprite;
   if (!sprite)
     return;
 
-  image = GetImage(current_sprite);
+  image = GetImage(sprite);
   if (!image)
     goto done;
 
@@ -103,14 +103,14 @@ static void cmd_replace_color_execute(const char *argument)
   button_color1 = colorbutton_new
     (get_config_color("ReplaceColor", "Color1",
 		      colorbar_get_fg_color(app_get_colorbar())),
-     current_sprite->imgtype);
+     sprite->imgtype);
 
   button_color2 = colorbutton_new
     (get_config_color("ReplaceColor", "Color2",
 		      colorbar_get_bg_color(app_get_colorbar())),
-     current_sprite->imgtype);
+     sprite->imgtype);
 
-  target_button = target_button_new(current_sprite->imgtype, FALSE);
+  target_button = target_button_new(sprite->imgtype, FALSE);
   target_button_set_target(target_button, effect->target);
 
   jslider_set_value(slider_fuzziness,
@@ -149,7 +149,7 @@ static void cmd_replace_color_execute(const char *argument)
   effect_free(effect);
 
   /* update editors */
-  update_screen_for_sprite(current_sprite);
+  update_screen_for_sprite(sprite);
 
   /* save window configuration */
   save_window_pos(window, "ReplaceColor");
@@ -157,8 +157,6 @@ static void cmd_replace_color_execute(const char *argument)
 done:;
   if (window)
     jwidget_free(window);
-
-  sprite_unlock(sprite);
 }
 
 static bool color_change_hook(JWidget widget, void *data)
@@ -196,6 +194,7 @@ static bool preview_change_hook(JWidget widget, void *data)
 
 static void make_preview()
 {
+  CurrentSprite sprite;
   color_t from, to;
   int fuzziness;
 
@@ -203,8 +202,8 @@ static void make_preview()
   to = get_config_color("ReplaceColor", "Color2", color_mask());
   fuzziness = get_config_int("ReplaceColor", "Fuzziness", 0);
 
-  set_replace_colors(get_color_for_layer(current_sprite->layer, from),
-		     get_color_for_layer(current_sprite->layer, to),
+  set_replace_colors(get_color_for_layer(sprite->layer, from),
+		     get_color_for_layer(sprite->layer, to),
 		     MID(0, fuzziness, 255));
 
   if (jwidget_is_selected(check_preview))

src/core/app.cpp

@@ -30,6 +30,7 @@
 #include "jinete/jinete.h"
 #include "jinete/jintern.h"
 
+#include "ase/ui_context.h"
 #include "commands/commands.h"
 #include "console/console.h"
 #include "core/app.h"
@@ -291,10 +292,8 @@ void app_loop()
     switch (option->type) {
 
       case OPEN_GFX_FILE: {
-	Sprite *sprite;
-
 	/* load the sprite */
-	sprite = sprite_load(option->data);
+	Sprite *sprite = sprite_load(option->data);
 	if (!sprite) {
 	  /* error */
 	  if (ase_mode & MODE_GUI)
@@ -304,12 +303,13 @@ void app_loop()
 	}
 	else {
 	  /* mount and select the sprite */
-	  sprite_mount(sprite);
-	  set_current_sprite(sprite);
+	  UIContext* context = UIContext::instance();
+	  context->add_sprite(sprite);
+	  context->set_current_sprite(sprite);
 
 	  if (ase_mode & MODE_GUI) {
 	    /* show it */
-	    set_sprite_in_more_reliable_editor(get_first_sprite());
+	    set_sprite_in_more_reliable_editor(context->get_first_sprite());
 
 	    /* recent file */
 	    recent_file(option->data);
@@ -333,8 +333,11 @@ void app_loop()
     dialogs_select_language(FALSE);
 
     /* show tips? */
-    if (!current_sprite)
-      dialogs_tips(FALSE);
+    {
+      CurrentSprite sprite;
+      if (!sprite)
+	dialogs_tips(FALSE);
+    }
 
     // support to drop files from Windows explorer
     install_drop_files();
@@ -383,6 +386,7 @@ void app_exit()
 
   /* finalize modules, configuration and core */
   modules_exit();
+  UIContext::destroy_instance();
   editor_cursor_exit();
   boundary_exit();
 
@@ -426,10 +430,11 @@ void app_trigger_event(int app_event)
 void app_refresh_screen()
 {
   if (ase_mode & MODE_GUI) {
+    CurrentSprite sprite;
+
     /* update the color palette */
-    set_current_palette(current_sprite != NULL ?
-			sprite_get_palette(current_sprite,
-					   current_sprite->frame): NULL,
+    set_current_palette(sprite != NULL ?
+			sprite_get_palette(sprite, sprite->frame): NULL,
 			FALSE);
 
     /* redraw the screen */
@@ -442,15 +447,14 @@ void app_refresh_screen()
  */
 void app_realloc_sprite_list()
 {
-  Sprite* sprite;
-  JLink link;
+  UIContext* context = UIContext::instance();
+  const SpriteList& list = context->get_sprite_list();
 
   /* insert all other sprites */
-  JI_LIST_FOR_EACH(get_sprite_list(), link) {
-    sprite = reinterpret_cast<Sprite*>(link->data);
-    tabs_set_text_for_tab(tabsbar,
-			  get_filename(sprite->filename),
-			  sprite);
+  for (SpriteList::const_iterator
+	 it = list.begin(); it != list.end(); ++it) {
+    Sprite* sprite = *it;
+    tabs_set_text_for_tab(tabsbar, get_filename(sprite->filename), sprite);
   }
 }
 
@@ -510,8 +514,9 @@ bool app_realloc_recent_list()
 
 int app_get_current_image_type()
 {
-  if (current_sprite)
-    return current_sprite->imgtype;
+  CurrentSprite sprite;
+  if (sprite)
+    return sprite->imgtype;
   else if (screen != NULL && bitmap_color_depth(screen) == 8)
     return IMAGE_INDEXED;
   else
@@ -568,9 +573,11 @@ int app_get_color_to_clear_layer(Layer *layer)
 static void tabsbar_select_callback(JWidget tabs, void *data, int button)
 {
   // Note: data can be NULL (the "Nothing" tab)
+  Sprite* sprite = (Sprite*)data;
 
   // put as current sprite
-  sprite_show((Sprite *)data);
+  UIContext* context = UIContext::instance();
+  context->show_sprite(sprite);
 
   // middle button: close the sprite
   if (data && (button & 4))

src/core/job.cpp

@@ -29,7 +29,7 @@
 #include "modules/gui.h"
 #include "widgets/statebar.h"
 
-Job::Job()
+Job::Job(const char* job_name)
 {
   m_mutex = NULL;
   m_thread = NULL;
@@ -45,7 +45,7 @@ Job::Job()
   m_monitor = add_gui_monitor(&Job::monitor_proc,
 			      &Job::monitor_free,
 			      (void*)this);
-  m_alert_window = jalert_new(PACKAGE "<<Working...||&Cancel");
+  m_alert_window = jalert_new("%s<<Working...||&Cancel", job_name);
 }
 
 Job::~Job()

src/core/job.h

@@ -35,9 +35,14 @@ class Job
   bool m_done_flag;
   bool m_canceled_flag;
 
+  // these methods are privated and not defined
+  Job();
+  Job(const Job&);
+  Job& operator==(const Job&);
+  
 public:
 
-  Job();
+  Job(const char* job_name);
   virtual ~Job();
 
   void do_job();

src/core/modules.cpp

@@ -27,7 +27,6 @@
 #include "modules/palettes.h"
 #include "modules/recent.h"
 #include "modules/rootmenu.h"
-#include "modules/sprites.h"
 #include "modules/tools.h"
 
 #define DEF_MODULE(name, reqs) \
@@ -48,7 +47,6 @@ static Module module[] =
      first ones.  */
 
   DEF_MODULE(palette,		REQUIRE_INTERFACE),
-  DEF_MODULE(sprites,		REQUIRE_INTERFACE),
   DEF_MODULE(effect,		REQUIRE_INTERFACE),
   DEF_MODULE(tools,		REQUIRE_INTERFACE),
   DEF_MODULE(graphics,		REQUIRE_INTERFACE),

src/dialogs/aniedit.cpp

@@ -163,7 +163,7 @@ bool animation_editor_is_movingcel()
  */
 void switch_between_animation_and_sprite_editor()
 {
-  Sprite* sprite = current_sprite;
+  CurrentSprite sprite;
   JWidget window;
   JWidget anieditor;
   int layer;

src/dialogs/canvasze.cpp

@@ -47,7 +47,7 @@ void canvas_resize()
   JWidget check_w, check_h;
   JWidget button_offset;
   JWidget button_ok, button_cancel;
-  Sprite *sprite = current_sprite;
+  CurrentSprite sprite;
 
   if (!is_interactive () || !sprite)
     return;

src/dialogs/drawtext.cpp

@@ -53,12 +53,13 @@ void dialogs_draw_text()
   Image *image, *dest_image;
   JWidget window, button_ok, color_box, color_but;
   JWidget entry_size, entry_text;
+  CurrentSprite sprite;
   char buf[256];
 
-  if (!is_interactive() || !current_sprite)
+  if (!is_interactive() || !sprite)
     return;
 
-  dest_image = GetImage(current_sprite);
+  dest_image = GetImage(sprite);
   if (!dest_image)
     return;
 
@@ -84,7 +85,7 @@ void dialogs_draw_text()
   color_but = colorbutton_new
     (get_config_color("DrawText", "Color",
 		      colorbar_get_fg_color(app_get_colorbar())),
-     current_sprite->imgtype);
+     sprite->imgtype);
 
   jwidget_add_child(color_box, color_but);
 
@@ -126,7 +127,7 @@ void dialogs_draw_text()
       ji_font_set_size(f, size);
 
       /* setup color */
-      color = get_color_for_image(current_sprite->imgtype,
+      color = get_color_for_image(sprite->imgtype,
 				  color_with_type);
 
       /* update configuration */
@@ -137,9 +138,8 @@ void dialogs_draw_text()
       /* render text */
       image = render_text(f, text, color);
       if (image) {
-	clipboard::copy_image(image, sprite_get_palette(current_sprite,
-							current_sprite->frame));
-	clipboard::paste(current_sprite);
+	clipboard::copy_image(image, sprite_get_palette(sprite, sprite->frame));
+	clipboard::paste(sprite);
       }
       else
 	console_printf(_("Error rendering text.\n"));
@@ -186,6 +186,7 @@ static Image *render_text(FONT *f, const char *text, int color)
     }							\
   }
 
+  CurrentSprite sprite;
   int i, pixels, w, h;
   Image *image;
   BITMAP *bmp;
@@ -206,7 +207,7 @@ static Image *render_text(FONT *f, const char *text, int color)
   clear_to_color(bmp, makecol32 (255, 0, 255));
   textout(bmp, f, text, 0, 0, makecol32 (255, 255, 255));
 
-  image = image_new(current_sprite->imgtype, w, h);
+  image = image_new(sprite->imgtype, w, h);
   if (!image) {
     destroy_bitmap(bmp);
     return NULL;

src/dialogs/maskcol.cpp

@@ -58,13 +58,13 @@ void dialogs_mask_color()
   JWidget label_color, button_1, button_2;
   JWidget label_fuzziness;
   JWidget button_ok, button_cancel;
-  Sprite *sprite = current_sprite;
+  CurrentSprite sprite;
   Image *image;
 
   if (!is_interactive () || !sprite)
     return;
 
-  image = GetImage(current_sprite);
+  image = GetImage(sprite);
   if (!image)
     return;
 
@@ -190,18 +190,15 @@ static bool preview_change_hook(JWidget widget, void *data)
 static Mask *gen_mask()
 {
   int xpos, ypos, color, fuzziness;
-  Sprite *sprite;
-  Image *image;
-  Mask *mask;
+  CurrentSprite sprite;
 
-  sprite = current_sprite;
-  image = GetImage2(sprite, &xpos, &ypos, NULL);
+  Image* image = GetImage2(sprite, &xpos, &ypos, NULL);
 
   color = get_color_for_image(sprite->imgtype,
 			      colorbutton_get_color(button_color));
   fuzziness = jslider_get_value(slider_fuzziness);
 
-  mask = mask_new();
+  Mask* mask = mask_new();
   mask_by_color(mask, image, color, fuzziness);
   mask_move(mask, xpos, ypos);
 
@@ -211,7 +208,7 @@ static Mask *gen_mask()
 static void mask_preview()
 {
   if (jwidget_is_selected (check_preview)) {
-    Sprite *sprite = current_sprite;
+    CurrentSprite sprite;
     Mask *mask = gen_mask();
     Mask *old_mask = sprite->mask;
 

src/dialogs/vectmap.cpp

@@ -127,7 +127,7 @@ void dialogs_vector_map()
 {
 #define PROJECT()	project(image, x, y, dmax, &u, &v)
 
-  Sprite *sprite = current_sprite;
+  CurrentSprite sprite;
   Image *image, *image_copy;
   double u, v, dmax;
   int c, x, y;
@@ -135,7 +135,7 @@ void dialogs_vector_map()
   if (!is_interactive () || !sprite)
     return;
 
-  image = GetImage(current_sprite);
+  image = GetImage(sprite);
   if (!image)
     return;
 

src/file/file.cpp

@@ -506,7 +506,7 @@ void fop_operate(FileOp *fop)
 	    if (fop->seq.image) image_free(fop->seq.image);
 	    if (fop->seq.last_cel) cel_free(fop->seq.last_cel);
 	    if (fop->sprite) {
-	      sprite_free(fop->sprite);
+	      delete fop->sprite;
 	      fop->sprite = NULL;
 	    }
 	    break;
@@ -744,7 +744,7 @@ Image *fop_sequence_image(FileOp *fop, int imgtype, int w, int h)
 
     layer = layer_new(sprite);
     if (!layer) {
-      sprite_free(sprite);
+      delete sprite;
       return NULL;
     }
 

src/file/gif_format.cpp

@@ -254,7 +254,7 @@ error:;
   if (current_image_old) image_free(current_image_old);
   if (npal) palette_free(npal);
   if (opal) palette_free(opal);
-  if (sprite) sprite_free(sprite);
+  delete sprite;
   return ret;
 }
 

src/modules/editors.cpp

@@ -20,6 +20,7 @@
 
 #include "jinete/jinete.h"
 
+#include "ase/ui_context.h"
 #include "core/app.h"
 #include "modules/editors.h"
 #include "modules/gui.h"
@@ -174,6 +175,7 @@ void editors_draw_sprite_tiled(Sprite *sprite, int x1, int y1, int x2, int y2)
 
 void editors_hide_sprite(Sprite *sprite)
 {
+  CurrentSprite current_sprite;
   JWidget widget;
   int refresh;
   JLink link;
@@ -188,7 +190,9 @@ void editors_hide_sprite(Sprite *sprite)
   }
 
   if (refresh) {
-    set_current_sprite(editor_get_sprite(current_editor));
+    UIContext* context = UIContext::instance();
+    context->set_current_sprite(editor_get_sprite(current_editor));
+
     app_refresh_screen();
   }
 }
@@ -218,7 +222,9 @@ void set_current_editor(JWidget editor)
 
     jwidget_dirty(jwidget_get_view(current_editor));
 
-    set_current_sprite(editor_get_sprite(current_editor));
+    UIContext* context = UIContext::instance();
+    context->set_current_sprite(editor_get_sprite(current_editor));
+
     app_refresh_screen();
     app_realloc_sprite_list();
   }
@@ -227,8 +233,11 @@ void set_current_editor(JWidget editor)
 void set_sprite_in_current_editor(Sprite *sprite)
 {
   if (current_editor) {
-    set_current_sprite(sprite);
-    send_sprite_to_top(sprite);
+    UIContext* context = UIContext::instance();
+    
+    context->set_current_sprite(sprite);
+    if (sprite != NULL)
+      context->send_sprite_to_top(sprite);
 
     editor_set_sprite(current_editor, sprite);
 
@@ -420,12 +429,12 @@ static int is_sprite_in_some_editor(Sprite *sprite)
  */
 static Sprite *get_more_reliable_sprite()
 {
-  Sprite *sprite;
-  JLink link;
-
-  JI_LIST_FOR_EACH(get_sprite_list(), link) {
-    sprite = reinterpret_cast<Sprite*>(link->data);
+  UIContext* context = UIContext::instance();
+  const SpriteList& list = context->get_sprite_list();
 
+  for (SpriteList::const_iterator
+	 it = list.begin(); it != list.end(); ++it) {
+    Sprite* sprite = *it;
     if (!(is_sprite_in_some_editor(sprite)))
       return sprite;
   }

src/modules/gui.cpp

@@ -29,6 +29,7 @@
 #include "jinete/jinete.h"
 #include "jinete/jintern.h"
 
+#include "ase/ui_context.h"
 #include "commands/commands.h"
 #include "console/console.h"
 #include "core/app.h"
@@ -411,7 +412,7 @@ void gui_feedback()
 
   if (next_idle_flags & REFRESH_FULL_SCREEN) {
     next_idle_flags ^= REFRESH_FULL_SCREEN;
-    update_screen_for_sprite(current_sprite);
+    update_screen_for_sprite(UIContext::instance()->get_current_sprite());
   }
 
   /* record file if is necessary */

src/modules/sprites.cpp

@@ -18,17 +18,12 @@
 
 #include "config.h"
 
-#include <assert.h>
-#include <allegro/file.h>
+#include <cassert>
 
 #include "jinete/jlist.h"
 
-#include "core/app.h"
-#include "core/core.h"
-#include "file/file.h"
+#include "ase/ui_context.h"
 #include "effect/effect.h"
-#include "modules/editors.h"
-#include "modules/gui.h"
 #include "modules/sprites.h"
 #include "raster/cel.h"
 #include "raster/image.h"
@@ -37,151 +32,43 @@
 #include "raster/sprite.h"
 #include "raster/stock.h"
 #include "util/misc.h"
-#include "widgets/editor.h"
-#include "widgets/tabs.h"
-
-/* Current selected sprite to operate, it could be not the same of
-   editor_get_sprite(current_editor).  */
-
-Sprite* current_sprite = NULL;
-
-static JList sprites_list;
 
 static ImageRef *images_ref_get_from_layer(Sprite* sprite, Layer *layer, int target, bool write);
 static void layer_get_pos(Sprite* sprite, Layer *layer, int target, bool write, int **x, int **y, int *count);
 
-int init_module_sprites()
+//////////////////////////////////////////////////////////////////////
+
+CurrentSprite::CurrentSprite()
 {
-  sprites_list = jlist_new();
-  current_sprite = NULL;
-  return 0;
+  UIContext* context = UIContext::instance();
+
+  m_sprite = context->get_current_sprite();
+  if (m_sprite)
+    m_writeable = m_sprite->lock();
 }
 
-void exit_module_sprites()
+CurrentSprite::~CurrentSprite()
 {
-  JLink link;
-
-  JI_LIST_FOR_EACH(sprites_list, link) {
-    sprite_free(reinterpret_cast<Sprite*>(link->data));
-  }
-  jlist_free(sprites_list);
-  sprites_list = NULL;
-
-  current_sprite = NULL;
+  if (m_sprite)
+    m_sprite->unlock();
 }
 
-JList get_sprite_list()
+void CurrentSprite::destroy()
 {
-  return sprites_list;
-}
+  if (m_sprite) {
+    UIContext* context = UIContext::instance();
 
-Sprite* get_first_sprite()
-{
-  return reinterpret_cast<Sprite*>(jlist_first_data(sprites_list));
-}
+    context->remove_sprite(m_sprite);
 
-Sprite* get_next_sprite(Sprite* sprite)
-{
-  JLink link = jlist_find(sprites_list, sprite);
+    m_sprite->unlock();
 
-  if (sprites_list->end != link &&
-      sprites_list->end != link->next)
-    return reinterpret_cast<Sprite*>(link->next->data);
-  else
-    return NULL;
-}
-
-/* adds the "sprite" in the list of sprites */
-void sprite_mount(Sprite* sprite)
-{
-  /* append the sprite to the list */
-  jlist_prepend(sprites_list, sprite);
-
-  if (is_interactive()) {
-    /* add the tab for this sprite */
-    tabs_append_tab(app_get_tabsbar(),
-		    get_filename(sprite->filename), sprite);
-
-    /* rebuild the menu list of sprites */
-    app_realloc_sprite_list();
+    delete m_sprite;
+    m_sprite = NULL;
+    m_writeable = false;
   }
 }
 
-/* removes the "sprite" from the list of sprites */
-void sprite_unmount(Sprite* sprite)
-{
-  /* remove from the sprite's list */
-  jlist_remove(sprites_list, sprite);
-
-  if (is_interactive()) {
-    /* remove this sprite from tabs */
-    tabs_remove_tab(app_get_tabsbar(), sprite);
-
-    /* rebuild the menu list of sprites */
-    app_realloc_sprite_list();
-
-    /* select other sprites in the editors where are this sprite */
-    editors_hide_sprite(sprite);
-  }
-  else {
-    if (current_sprite == sprite)
-      set_current_sprite(NULL);
-  }
-}
-
-/* sets current sprite (doesn't show it, only sets the
-   "current_sprite" pointer).  */
-void set_current_sprite(Sprite* sprite)
-{
-  current_sprite = sprite;
-
-  /* select the sprite in the tabs */
-  tabs_select_tab(app_get_tabsbar(), sprite);
-}
-
-void send_sprite_to_top(Sprite* sprite)
-{
-  if (sprite && jlist_find(sprites_list, sprite) != sprites_list->end) {
-    jlist_remove(sprites_list, sprite);
-    jlist_prepend(sprites_list, sprite);
-  }
-}
-
-/* puts the sprite in some editor */
-void sprite_show(Sprite* sprite)
-{
-  if (is_interactive())
-    set_sprite_in_more_reliable_editor(sprite);
-}
-
-bool is_current_sprite_not_locked()
-{
-  return
-    current_sprite != NULL &&
-    !sprite_is_locked(current_sprite);
-}
-
-bool is_current_sprite_writable()
-{
-  return
-    current_sprite != NULL
-    && !sprite_is_locked(current_sprite)
-    && current_sprite->layer != NULL
-    && layer_is_readable(current_sprite->layer)
-    && layer_is_writable(current_sprite->layer)
-    && layer_is_image(current_sprite->layer)
-    && layer_get_cel(current_sprite->layer,
-		     current_sprite->frame) != NULL;
-}
-
-Sprite* lock_current_sprite()
-{
-  if (current_sprite != NULL &&
-      sprite_lock(current_sprite))
-    return current_sprite;
-  else
-    return NULL;
-}
+//////////////////////////////////////////////////////////////////////
 
 ImageRef *images_ref_get_from_sprite(Sprite* sprite, int target, bool write)
 {

src/modules/sprites.h

@@ -19,12 +19,14 @@
 #ifndef MODULES_SPRITES_H
 #define MODULES_SPRITES_H
 
+#include <cassert>
+
 #include "jinete/jbase.h"
+#include "raster/sprite.h"
 
 class Image;
 class Layer;
 class Cel;
-class Sprite;
 
 struct ImageRef
 {
@@ -34,26 +36,26 @@ struct ImageRef
   ImageRef* next;
 };
 
-extern Sprite* current_sprite;
+class CurrentSprite
+{
+  Sprite* m_sprite;
+  bool m_writeable;
 
-int init_module_sprites();
-void exit_module_sprites();
+public:
+  CurrentSprite();
+  ~CurrentSprite();
 
-JList get_sprite_list();
-Sprite* get_first_sprite();
-Sprite* get_next_sprite(Sprite* sprite);
+  bool writeable() const { return m_writeable; }
+  void destroy();
 
-void sprite_mount(Sprite* sprite);
-void sprite_unmount(Sprite* sprite);
+  operator Sprite* () { return m_sprite; }
 
-void set_current_sprite(Sprite* sprite);
-void send_sprite_to_top(Sprite* sprite);
-void sprite_show(Sprite* sprite);
+  Sprite* operator->() {
+    assert(m_sprite != NULL);
+    return m_sprite;
+  }
 
-bool is_current_sprite_not_locked();
-bool is_current_sprite_writable();
-
-Sprite* lock_current_sprite();
+};
 
 ImageRef* images_ref_get_from_sprite(Sprite* sprite, int target, bool write);
 void images_ref_free(ImageRef* image_ref);

src/raster/sprite.cpp

@@ -91,8 +91,8 @@ Sprite::Sprite(int imgtype, int w, int h)
   sprite_set_speed(this, 100);
 
   /* multiple access */
-  this->locked = FALSE;
-  this->mutex = jmutex_new();
+  m_locked = 0;
+  m_mutex = jmutex_new();
 
   /* file format options */
   this->format_options = NULL;
@@ -105,7 +105,7 @@ Sprite::~Sprite()
 {
   JLink link;
 
-  assert(!this->locked);
+  // assert(m_locked == 1);
 
   /* destroy images' stock */
   if (this->stock)
@@ -143,7 +143,7 @@ Sprite::~Sprite()
   if (this->bound.seg) jfree(this->bound.seg);
 
   /* destroy mutex */
-  jmutex_free(this->mutex);
+  jmutex_free(this->m_mutex);
 
   /* destroy file format options */
   if (this->format_options)
@@ -178,7 +178,7 @@ Sprite* sprite_new_copy(const Sprite* src_sprite)
   undo_enable(dst_sprite->undo);
 
   if (dst_sprite->set == NULL) {
-    sprite_free(dst_sprite);
+    delete dst_sprite;
     return NULL;
   }
 
@@ -211,7 +211,7 @@ Sprite* sprite_new_flatten_copy(const Sprite* src_sprite)
 				      0, 0, src_sprite->w, src_sprite->h,
 				      0, src_sprite->frames-1);
   if (flat_layer == NULL) {
-    sprite_free(dst_sprite);
+    delete dst_sprite;
     return NULL;
   }
 
@@ -237,7 +237,7 @@ Sprite* sprite_new_with_layer(int imgtype, int w, int h)
   /* new image */
   image = image_new(imgtype, w, h);
   if (!image) {
-    sprite_free(sprite);
+    delete sprite;
     return NULL;
   }
 
@@ -245,7 +245,7 @@ Sprite* sprite_new_with_layer(int imgtype, int w, int h)
   layer = layer_new(sprite);
   if (!layer) {
     image_free(image);
-    sprite_free(sprite);
+    delete sprite;
     return NULL;
   }
 
@@ -276,16 +276,6 @@ Sprite* sprite_new_with_layer(int imgtype, int w, int h)
   return sprite;
 }
 
-/**
- * Destroys the sprite
- */
-void sprite_free(Sprite* sprite)
-{
-  assert(sprite);
-  delete sprite;
-}
-
-
 bool sprite_is_modified(Sprite* sprite)
 {
   assert(sprite != NULL);
@@ -301,19 +291,6 @@ bool sprite_is_associated_to_file(Sprite* sprite)
   return sprite->associated_to_file;
 }
 
-bool sprite_is_locked(Sprite* sprite)
-{
-  bool locked;
-
-  assert(sprite != NULL);
-
-  jmutex_lock(sprite->mutex);
-  locked = sprite->locked;
-  jmutex_unlock(sprite->mutex);
-    
-  return locked;
-}
-
 void sprite_mark_as_saved(Sprite* sprite)
 {
   assert(sprite != NULL);
@@ -336,30 +313,27 @@ bool sprite_need_alpha(Sprite* sprite)
   return FALSE;
 }
 
-bool sprite_lock(Sprite* sprite)
+/**
+ * Lock the sprite to write or read it.
+ *
+ * @return true if the sprite can be written (because this is the first lock).
+ */
+bool Sprite::lock()
 {
-  bool res = FALSE;
+  ScopedLock hold(m_mutex);
 
-  assert(sprite != NULL);
-
-  jmutex_lock(sprite->mutex);
-  if (!sprite->locked) {
-    sprite->locked = TRUE;
-    res = TRUE;
-  }
-  jmutex_unlock(sprite->mutex);
-
-  return res;
+  if (++m_locked == 1)
+    return true;
+  else
+    return false;
 }
 
-void sprite_unlock(Sprite* sprite)
+void Sprite::unlock()
 {
-  assert(sprite != NULL);
+  ScopedLock hold(m_mutex);
 
-  jmutex_lock(sprite->mutex);
-  assert(sprite->locked);
-  sprite->locked = FALSE;
-  jmutex_unlock(sprite->mutex);
+  --m_locked;
+  assert(m_locked >= 0);
 }
 
 Palette* sprite_get_palette(Sprite* sprite, int frame)
@@ -838,7 +812,7 @@ static Sprite* general_copy(const Sprite* src_sprite)
   stock_free(dst_sprite->stock);
   dst_sprite->stock = stock_new_copy(src_sprite->stock);
   if (!dst_sprite->stock) {
-    sprite_free(dst_sprite);
+    delete dst_sprite;
     return NULL;
   }
 
@@ -862,7 +836,7 @@ static Sprite* general_copy(const Sprite* src_sprite)
   if (src_sprite->path) {
     dst_sprite->path = path_new_copy(src_sprite->path);
     if (!dst_sprite->path) {
-      sprite_free(dst_sprite);
+      delete dst_sprite;
       return NULL;
     }
   }
@@ -876,7 +850,7 @@ static Sprite* general_copy(const Sprite* src_sprite)
   if (src_sprite->mask) {
     dst_sprite->mask = mask_new_copy(src_sprite->mask);
     if (!dst_sprite->mask) {
-      sprite_free(dst_sprite);
+      delete dst_sprite;
       return NULL;
     }
   }

src/raster/sprite.h

@@ -70,15 +70,19 @@ public:
     int zoom;
   } preferred;
 
+private:
+
   /**
    * Mutex to modify the 'locked' flag.
    */
-  JMutex mutex;
+  JMutex m_mutex;
 
   /**
-   * True when a thread is reading/writing the sprite.
+   * Greater than zero when a thread is reading/writing the sprite.
    */
-  bool locked;
+  int m_locked;
+
+public:
 
   /**
    * Data to save the file in the same format that it was loaded
@@ -87,24 +91,22 @@ public:
 
   Sprite(int imgtype, int w, int h);
   virtual ~Sprite();
+
+  bool lock();
+  void unlock();
 };
 
 Sprite* sprite_new(int imgtype, int w, int h);
 Sprite* sprite_new_copy(const Sprite* src_sprite);
 Sprite* sprite_new_flatten_copy(const Sprite* src_sprite);
 Sprite* sprite_new_with_layer(int imgtype, int w, int h);
-void sprite_free(Sprite* sprite);
 
 bool sprite_is_modified(Sprite* sprite);
 bool sprite_is_associated_to_file(Sprite* sprite);
-bool sprite_is_locked(Sprite* sprite);
 void sprite_mark_as_saved(Sprite* sprite);
 
 bool sprite_need_alpha(Sprite* sprite);
 
-bool sprite_lock(Sprite* sprite);
-void sprite_unlock(Sprite* sprite);
-
 struct Palette* sprite_get_palette(Sprite* sprite, int frame);
 void sprite_set_palette(Sprite* sprite, struct Palette* pal, bool truncate);
 void sprite_reset_palettes(Sprite* sprite);

src/tests/raster/03sprite.cpp

@@ -112,7 +112,7 @@ void test ()
 
   image_free(image_screen);
   image_free(image_bg);
-  sprite_free(sprite);
+  delete sprite;
   destroy_bitmap(bmp);
 }
 

src/util/celmove.cpp

@@ -55,7 +55,7 @@ void set_frame_to_handle(Layer *_src_layer, int _src_frame,
 
 void move_cel()
 {
-  Sprite *sprite = current_sprite;
+  CurrentSprite sprite;
   Cel *src_cel, *dst_cel;
 
   assert(src_layer != NULL);
@@ -147,7 +147,7 @@ void move_cel()
 
 void copy_cel()
 {
-  Sprite *sprite = current_sprite;
+  CurrentSprite sprite;
   Cel *src_cel, *dst_cel;
 
   assert(src_layer != NULL);

src/util/functions.cpp

@@ -21,6 +21,7 @@
 #include <assert.h>
 #include "jinete/jinete.h"
 
+#include "ase/ui_context.h"
 #include "console/console.h"
 #include "core/app.h"
 #include "file/file.h"
@@ -69,8 +70,10 @@ Sprite *NewSprite(int imgtype, int w, int h)
     return NULL;
 
   undo_disable(sprite->undo);
-  sprite_mount(sprite);
-  set_current_sprite(sprite);
+
+  UIContext* context = UIContext::instance();
+  context->add_sprite(sprite);
+  context->set_current_sprite(sprite);
 
   assert(undo_is_disabled(sprite->undo));
   return sprite;
@@ -99,8 +102,10 @@ Sprite *LoadSprite(const char *filename)
   sprite = sprite_load(filename);
   if (sprite) {
     undo_disable(sprite->undo);
-    sprite_mount(sprite);
-    set_current_sprite(sprite);
+
+    UIContext* context = UIContext::instance();
+    context->add_sprite(sprite);
+    context->set_current_sprite(sprite);
   }
 
   assert(undo_is_disabled(sprite->undo));
@@ -112,7 +117,9 @@ Sprite *LoadSprite(const char *filename)
  */
 void SaveSprite(const char *filename)
 {
-  if (current_sprite == NULL) {
+  CurrentSprite sprite;
+
+  if (sprite == NULL) {
     console_printf("SaveSprite: No current sprite\n");
     return;
   }
@@ -122,11 +129,11 @@ void SaveSprite(const char *filename)
     return;
   }
 
-  sprite_set_filename(current_sprite, filename);
+  sprite_set_filename(sprite, filename);
   app_realloc_sprite_list();
 
-  if (sprite_save(current_sprite) == 0)
-    sprite_mark_as_saved(current_sprite);
+  if (sprite_save(sprite) == 0)
+    sprite_mark_as_saved(sprite);
   else
     console_printf("SaveSprite: Error saving sprite file %s\n", filename);
 }
@@ -137,7 +144,8 @@ void SaveSprite(const char *filename)
  */
 void SetSprite(Sprite *sprite)
 {
-  set_current_sprite(sprite);
+  UIContext* context = UIContext::instance();
+  context->set_current_sprite(sprite);
 }
 
 /*===================================================================*/
@@ -396,7 +404,7 @@ static int get_max_layer_num(Layer *layer)
 
 void RemoveCel(Layer *layer, Cel *cel)
 {
-  Sprite *sprite = current_sprite;
+  CurrentSprite sprite;
   Image *image;
   Cel *it;
   int frame;

src/util/misc.cpp

@@ -83,7 +83,8 @@ Image* GetImage2(Sprite* sprite, int* x, int* y, int* opacity)
 
 void LoadPalette(const char *filename)
 {
-  if (current_sprite) {
+  CurrentSprite sprite;
+  if (sprite) {
     DIRS *dir, *dirs;
     char buf[512];
 
@@ -101,8 +102,8 @@ void LoadPalette(const char *filename)
 	  set_current_palette(pal, FALSE);
 
 	  /* just one palette */
-	  sprite_reset_palettes(current_sprite);
-	  sprite_set_palette(current_sprite, pal, 0);
+	  sprite_reset_palettes(sprite);
+	  sprite_set_palette(sprite, pal, 0);
 
 	  /* redraw the entire screen */
 	  jmanager_refresh_screen();

src/widgets/colbar.cpp

@@ -477,11 +477,9 @@ static bool colorbar_msg_proc(JWidget widget, JMessage msg)
       /* time to refresh all the editors which have the current
 	 sprite selected? */
       if (msg->timer.timer_id == colorbar->refresh_timer_id) {
-	Sprite *sprite = current_sprite;
-
-	if (sprite != NULL) {
+	CurrentSprite sprite;
+	if (sprite != NULL)
 	  update_editors_with_sprite(sprite);
-	}
 
 	jmanager_stop_timer(colorbar->refresh_timer_id);
       }
@@ -653,8 +651,8 @@ static bool tooltip_window_msg_proc(JWidget widget, JMessage msg)
   switch (msg->type) {
 
     case JM_CLOSE: {
-      /* change the sprite palette */
-      Sprite *sprite = current_sprite;
+      // change the sprite palette
+      CurrentSprite sprite;
 
       if (sprite != NULL) {
 	Palette *pal = sprite_get_palette(sprite, sprite->frame);
@@ -726,8 +724,8 @@ static bool tooltip_window_msg_proc(JWidget widget, JMessage msg)
 	   different from the current sprite's palette, then we have
 	   to start the "refresh_timer" to refresh all the editors
 	   with that sprite */
-	if (current_sprite != NULL && bitmap_color_depth(screen) != 8) {
-	  Sprite *sprite = current_sprite;
+	CurrentSprite sprite;
+	if (sprite != NULL && bitmap_color_depth(screen) != 8) {
 	  Palette *pal = sprite_get_palette(sprite, sprite->frame);
 	  
 	  if (palette_count_diff(pal, get_current_palette(), NULL, NULL) > 0) {

src/widgets/editor/editor.cpp

@@ -26,6 +26,7 @@
 
 #include "jinete/jinete.h"
 
+#include "ase/ui_context.h"
 #include "commands/commands.h"
 #include "core/app.h"
 #include "core/cfg.h"
@@ -1026,8 +1027,10 @@ static bool editor_msg_proc(JWidget widget, JMessage msg)
       break;
 
     case JM_BUTTONPRESSED: {
+      UIContext* context = UIContext::instance();
+
       set_current_editor(widget);
-      set_current_sprite(editor->sprite);
+      context->set_current_sprite(editor->sprite);
 
       if (!editor->sprite)
 	break;
@@ -1396,7 +1399,6 @@ static void editor_update_candraw(JWidget widget)
 
   editor->cursor_candraw =
     (editor->sprite != NULL &&
-     !sprite_is_locked(editor->sprite) &&
      editor->sprite->layer != NULL &&
      layer_is_image(editor->sprite->layer) &&
      layer_is_readable(editor->sprite->layer) &&

src/widgets/fileview.cpp

@@ -751,7 +751,7 @@ static void openfile_bg(void *_data)
   sprite = fop->sprite;
   if (sprite) {
     if (fop_is_stop(fop))
-      sprite_free(fop->sprite);
+      delete fop->sprite;
     else {
       /* the palette to convert the Image to a BITMAP */
       palette_to_allegro(sprite_get_palette(sprite, 0), data->rgbpal);
@@ -760,7 +760,7 @@ static void openfile_bg(void *_data)
       image = image_new(sprite->imgtype, sprite->w, sprite->h);
       image_clear(image, 0);
       sprite_render(sprite, image, 0, 0);
-      sprite_free(sprite);
+      delete sprite;
 
       /* calculate the thumbnail size */
       thumb_w = MAX_THUMBNAIL_SIZE * image->w / MAX(image->w, image->h);

src/widgets/statebar.cpp

@@ -316,23 +316,31 @@ static bool statusbar_msg_proc(JWidget widget, JMessage msg)
 	}
       }
       /* draw current sprite size in memory */
-      else if (current_sprite != NULL) {
-	char buf[1024];
+      else {
+	CurrentSprite sprite;
+	if (sprite != NULL) {
+	  char buf[1024];
 
-	ustrcpy(buf, "Sprite:");
-	get_pretty_memsize(sprite_get_memsize(current_sprite),
-			   buf+ustrsize(buf),
-			   sizeof(buf)-ustrsize(buf));
+	  if (sprite.writeable()) {
+	    ustrcpy(buf, "Sprite:");
+	    get_pretty_memsize(sprite_get_memsize(sprite),
+			       buf+ustrsize(buf),
+			       sizeof(buf)-ustrsize(buf));
 
-	ustrcat(buf, " Undo:");
-	get_pretty_memsize(undo_get_memsize(current_sprite->undo),
-			   buf+ustrsize(buf),
-			   sizeof(buf)-ustrsize(buf));
+	    ustrcat(buf, " Undo:");
+	    get_pretty_memsize(undo_get_memsize(sprite->undo),
+			       buf+ustrsize(buf),
+			       sizeof(buf)-ustrsize(buf));
+	  }
+	  else {
+	    ustrcpy(buf, "Sprite is Locked");
+	  }
 
-	textout_right_ex(ji_screen, widget->font(), buf,
-			 rc->x2-2,
-			 (widget->rc->y1+widget->rc->y2)/2-text_height(widget->font())/2,
-			 ji_color_foreground(), -1);
+	  textout_right_ex(ji_screen, widget->font(), buf,
+			   rc->x2-2,
+			   (widget->rc->y1+widget->rc->y2)/2-text_height(widget->font())/2,
+			   ji_color_foreground(), -1);
+	}
       }
 
       jrect_free(rc);
@@ -341,7 +349,7 @@ static bool statusbar_msg_proc(JWidget widget, JMessage msg)
 
     case JM_MOUSEENTER:
       if (!jwidget_has_child(widget, statusbar->commands_box)) {
-	Sprite *sprite = current_sprite;
+	CurrentSprite sprite;
 
 	if (!sprite) {
 	  jwidget_disable(statusbar->b_first);
@@ -401,8 +409,7 @@ static bool tipwindow_msg_proc(JWidget widget, JMessage msg)
 
 static bool slider_change_hook(JWidget widget, void *data)
 {
-  Sprite *sprite = current_sprite;
-
+  CurrentSprite sprite;
   if (sprite) {
     if ((sprite->layer) &&
 	(sprite->layer->type == GFXOBJ_LAYER_IMAGE)) {
@@ -423,7 +430,7 @@ static bool slider_change_hook(JWidget widget, void *data)
 
 static void button_command(JWidget widget, void *data)
 {
-  Sprite *sprite = current_sprite;
+  CurrentSprite sprite;
 
   if (sprite) {
     const char *cmd = NULL;
@@ -462,7 +469,7 @@ static void button_command(JWidget widget, void *data)
 
 static void update_from_layer(StatusBar *statusbar)
 {
-  Sprite *sprite = current_sprite;
+  CurrentSprite sprite;
   Cel *cel;
 
   /* layer button */