Fix playback of same tag when adding new frames (fix https://communit…

…y.aseprite.org/t/6486)

src/app/cmd/set_tag_range.cpp

@@ -1,5 +1,5 @@
 // Aseprite
-// Copyright (C) 2019  Igara Studio S.A.
+// Copyright (C) 2019-2020  Igara Studio S.A.
 // Copyright (C) 2001-2015  David Capello
 //
 // This program is distributed under the terms of
@@ -11,7 +11,11 @@
 
 #include "app/cmd/set_tag_range.h"
 
+#include "app/doc.h"
+#include "app/doc_event.h"
+#include "doc/sprite.h"
 #include "doc/tag.h"
+#include "doc/tags.h"
 
 namespace app {
 namespace cmd {
@@ -37,5 +41,16 @@ void SetTagRange::onUndo()
   tag()->incrementVersion();
 }
 
+void SetTagRange::onFireNotifications()
+{
+  Tag* tag = this->tag();
+  Sprite* sprite = tag->owner()->sprite();
+  Doc* doc = static_cast<Doc*>(sprite->document());
+  DocEvent ev(doc);
+  ev.sprite(sprite);
+  ev.tag(tag);
+  doc->notify_observers<DocEvent&>(&DocObserver::onTagChange, ev);
+}
+
 } // namespace cmd
 } // namespace app

src/app/cmd/set_tag_range.h

@@ -1,5 +1,5 @@
 // Aseprite
-// Copyright (C) 2019  Igara Studio S.A.
+// Copyright (C) 2019-2020  Igara Studio S.A.
 // Copyright (C) 2001-2015  David Capello
 //
 // This program is distributed under the terms of
@@ -25,6 +25,7 @@ namespace cmd {
   protected:
     void onExecute() override;
     void onUndo() override;
+    void onFireNotifications() override;
     size_t onMemSize() const override {
       return sizeof(*this);
     }

src/app/doc_observer.h

@@ -1,5 +1,5 @@
 // Aseprite
-// Copyright (C) 2018-2019  Igara Studio S.A.
+// Copyright (C) 2018-2020  Igara Studio S.A.
 // Copyright (C) 2001-2018  David Capello
 //
 // This program is distributed under the terms of
@@ -73,6 +73,9 @@ namespace app {
     virtual void onSelectionChanged(DocEvent& ev) { }
     virtual void onSelectionBoundariesChanged(DocEvent& ev) { }
 
+    // Tags
+    virtual void onTagChange(DocEvent& ev) { }
+
     // Slices
     virtual void onSliceNameChange(DocEvent& ev) { }
 

src/app/ui/doc_view.cpp

@@ -417,6 +417,12 @@ void DocView::onRemoveFrame(DocEvent& ev)
   }
 }
 
+void DocView::onTagChange(DocEvent& ev)
+{
+  if (m_previewDelegate)
+    m_previewDelegate->onTagChangeEditor(m_editor, ev);
+}
+
 void DocView::onAddCel(DocEvent& ev)
 {
   UIContext::instance()->notifyActiveSiteChanged();

src/app/ui/doc_view.h

@@ -30,6 +30,7 @@ namespace app {
     virtual void onScrollOtherEditor(Editor* editor) = 0;
     virtual void onDisposeOtherEditor(Editor* editor) = 0;
     virtual void onPreviewOtherEditor(Editor* editor) = 0;
+    virtual void onTagChangeEditor(Editor* editor, DocEvent& ev) = 0;
   };
 
   class DocView : public ui::Box,
@@ -75,6 +76,7 @@ namespace app {
     void onAddLayer(DocEvent& ev) override;
     void onAddFrame(DocEvent& ev) override;
     void onRemoveFrame(DocEvent& ev) override;
+    void onTagChange(DocEvent& ev) override;
     void onAddCel(DocEvent& ev) override;
     void onRemoveCel(DocEvent& ev) override;
     void onTotalFramesChanged(DocEvent& ev) override;

src/app/ui/editor/play_state.cpp

@@ -51,6 +51,11 @@ PlayState::PlayState(const bool playOnce,
     &PlayState::onBeforeCommandExecution, this);
 }
 
+Tag* PlayState::playingTag() const
+{
+  return m_tag;
+}
+
 void PlayState::onEnterState(Editor* editor)
 {
   StateWithWheelBehavior::onEnterState(editor);

src/app/ui/editor/play_state.h

@@ -1,4 +1,5 @@
 // Aseprite
+// Copyright (C) 2020  Igara Studio S.A.
 // Copyright (C) 2001-2017  David Capello
 //
 // This program is distributed under the terms of
@@ -27,6 +28,8 @@ namespace app {
     PlayState(const bool playOnce,
               const bool playAll);
 
+    doc::Tag* playingTag() const;
+
     void onEnterState(Editor* editor) override;
     LeaveAction onLeaveState(Editor* editor, EditorState* newState) override;
     bool onMouseDown(Editor* editor, ui::MouseMessage* msg) override;

src/app/ui/preview_editor.cpp

@@ -13,6 +13,7 @@
 
 #include "app/app.h"
 #include "app/doc.h"
+#include "app/doc_event.h"
 #include "app/ini_file.h"
 #include "app/loop_tag.h"
 #include "app/modules/editors.h"
@@ -22,6 +23,7 @@
 #include "app/ui/editor/editor_customization_delegate.h"
 #include "app/ui/editor/editor_view.h"
 #include "app/ui/editor/navigate_state.h"
+#include "app/ui/editor/play_state.h"
 #include "app/ui/skin/skin_theme.h"
 #include "app/ui/status_bar.h"
 #include "app/ui/toolbar.h"
@@ -396,28 +398,7 @@ void PreviewEditorWindow::updateUsingEditor(Editor* editor)
     miniEditor->setFrame(editor->frame());
   }
   else {
-    if (miniEditor->isPlaying()) {
-      doc::Tag* tag = editor
-        ->getCustomizationDelegate()
-        ->getTagProvider()
-        ->getTagByFrame(editor->frame(), true);
-
-      doc::Tag* playingTag = editor
-        ->getCustomizationDelegate()
-        ->getTagProvider()
-        ->getTagByFrame(m_refFrame, true);
-
-      if (tag == playingTag)
-        return;
-
-      miniEditor->stop();
-    }
-
-    if (!miniEditor->isPlaying())
-      miniEditor->setFrame(m_refFrame = editor->frame());
-
-    miniEditor->play(Preferences::instance().preview.playOnce(),
-                     Preferences::instance().preview.playAll());
+    adjustPlayingTag();
   }
 }
 
@@ -478,6 +459,11 @@ void PreviewEditorWindow::onPreviewOtherEditor(Editor* editor)
   updateUsingEditor(editor);
 }
 
+void PreviewEditorWindow::onTagChangeEditor(Editor* editor, DocEvent& ev)
+{
+  adjustPlayingTag();
+}
+
 void PreviewEditorWindow::hideWindow()
 {
   destroyDocView();
@@ -495,4 +481,34 @@ void PreviewEditorWindow::destroyDocView()
   }
 }
 
+void PreviewEditorWindow::adjustPlayingTag()
+{
+  Editor* editor = m_relatedEditor;
+  Editor* miniEditor = m_docView->editor();
+
+  ASSERT(editor);
+  ASSERT(miniEditor);
+
+  if (miniEditor->isPlaying()) {
+    doc::Tag* tag = editor
+      ->getCustomizationDelegate()
+      ->getTagProvider()
+      ->getTagByFrame(editor->frame(), true);
+
+    auto playState = dynamic_cast<PlayState*>(miniEditor->getState().get());
+    doc::Tag* playingTag = (playState ? playState->playingTag(): nullptr);
+
+    if (tag == playingTag)
+      return;
+
+    miniEditor->stop();
+  }
+
+  if (!miniEditor->isPlaying())
+    miniEditor->setFrame(m_refFrame = editor->frame());
+
+  miniEditor->play(Preferences::instance().preview.playOnce(),
+                   Preferences::instance().preview.playAll());
+}
+
 } // namespace app

src/app/ui/preview_editor.h

@@ -1,4 +1,5 @@
 // Aseprite
+// Copyright (C) 2020  Igara Studio S.A.
 // Copyright (C) 2001-2018  David Capello
 //
 // This program is distributed under the terms of
@@ -42,6 +43,7 @@ namespace app {
     void onScrollOtherEditor(Editor* editor) override;
     void onDisposeOtherEditor(Editor* editor) override;
     void onPreviewOtherEditor(Editor* editor) override;
+    void onTagChangeEditor(Editor* editor, DocEvent& ev) override;
 
   protected:
     bool onProcessMessage(ui::Message* msg) override;
@@ -59,6 +61,7 @@ namespace app {
     void hideWindow();
     void destroyDocView();
     void saveScrollPref();
+    void adjustPlayingTag();
 
     bool m_isEnabled;
     DocView* m_docView;