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Code Issues Releases Wiki Activity

Some inversion of control flow when popping Undo state

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This commit is contained in:
Paul Licameli 2018-02-16 14:49:26 -05:00
parent 2741d58880
commit 4f7d308ca3
4 changed files with 19 additions and 25 deletions
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7
src/Project.cpp
View File

@ -4673,6 +4673,8 @@ void AudacityProject::ModifyState(bool bWantsAutoSave)
// Need to keep it and its tracks "t" available for Undo/Redo/SetStateTo.
void AudacityProject::PopState(const UndoState &state)
{
mViewInfo.selectedRegion = state.selectedRegion;
// Restore tags
mTags = state.tags;
@ -4725,9 +4727,8 @@ void AudacityProject::PopState(const UndoState &state)
void AudacityProject::SetStateTo(unsigned int n)
{
const UndoState &state =
GetUndoManager()->SetStateTo(n, &mViewInfo.selectedRegion);
PopState(state);
GetUndoManager()->SetStateTo(n,
[this]( const UndoState &state ){ PopState(state); } );
HandleResize();
mTrackPanel->SetFocusedTrack(NULL);

19
src/UndoManager.cpp
View File

@ -300,8 +300,7 @@ void UndoManager::PushState(const TrackList * l,
lastAction = longDescription;
}
const UndoState &UndoManager::SetStateTo
(unsigned int n, SelectedRegion *selectedRegion)
void UndoManager::SetStateTo(unsigned int n, const Consumer &consumer)
{
n -= 1;
@ -309,36 +308,30 @@ const UndoState &UndoManager::SetStateTo
current = n;
*selectedRegion = stack[current]->state.selectedRegion;
lastAction = wxT("");
mayConsolidate = false;
return stack[current]->state;
consumer( stack[current]->state );
}
const UndoState &UndoManager::Undo(SelectedRegion *selectedRegion)
void UndoManager::Undo(const Consumer &consumer)
{
wxASSERT(UndoAvailable());
current--;
*selectedRegion = stack[current]->state.selectedRegion;
lastAction = wxT("");
mayConsolidate = false;
return stack[current]->state;
consumer( stack[current]->state );
}
const UndoState &UndoManager::Redo(SelectedRegion *selectedRegion)
void UndoManager::Redo(const Consumer &consumer)
{
wxASSERT(RedoAvailable());
current++;
*selectedRegion = stack[current]->state.selectedRegion;
/*
if (!RedoAvailable()) {
*sel0 = stack[current]->sel0;
@ -355,7 +348,7 @@ const UndoState &UndoManager::Redo(SelectedRegion *selectedRegion)
lastAction = wxT("");
mayConsolidate = false;
return stack[current]->state;
consumer( stack[current]->state );
}
bool UndoManager::UnsavedChanges()

8
src/UndoManager.h
View File

@ -118,9 +118,11 @@ class AUDACITY_DLL_API UndoManager {
wxLongLong_t GetLongDescription(unsigned int n, wxString *desc, wxString *size);
void SetLongDescription(unsigned int n, const wxString &desc);
const UndoState &SetStateTo(unsigned int n, SelectedRegion *selectedRegion);
const UndoState &Undo(SelectedRegion *selectedRegion);
const UndoState &Redo(SelectedRegion *selectedRegion);
// These functions accept a callback that uses the state
using Consumer = std::function< void( const UndoState & ) >;
void SetStateTo(unsigned int n, const Consumer &consumer);
void Undo(const Consumer &consumer);
void Redo(const Consumer &consumer);
bool UndoAvailable();
bool RedoAvailable();

10
src/menus/EditMenus.cpp
View File

@ -219,7 +219,6 @@ void DoUndo(AudacityProject &project)
{
auto trackPanel = project.GetTrackPanel();
auto &undoManager = *project.GetUndoManager();
auto &selectedRegion = project.GetViewInfo().selectedRegion;
auto mixerBoard = project.GetMixerBoard();
auto historyWindow = project.GetHistoryWindow();
@ -233,8 +232,8 @@ void DoUndo(AudacityProject &project)
return;
}
const UndoState &state = undoManager.Undo(&selectedRegion);
project.PopState(state);
undoManager.Undo(
[&]( const UndoState &state ){ project.PopState( state ); } );
trackPanel->EnsureVisible(trackPanel->GetFirstSelectedTrack());
@ -264,7 +263,6 @@ void OnRedo(const CommandContext &context)
auto &project = context.project;
auto trackPanel = project.GetTrackPanel();
auto &undoManager = *project.GetUndoManager();
auto &selectedRegion = project.GetViewInfo().selectedRegion;
auto mixerBoard = project.GetMixerBoard();
auto historyWindow = project.GetHistoryWindow();
@ -277,8 +275,8 @@ void OnRedo(const CommandContext &context)
return;
}
const UndoState &state = undoManager.Redo(&selectedRegion);
project.PopState(state);
undoManager.Redo(
[&]( const UndoState &state ){ project.PopState( state ); } );
trackPanel->EnsureVisible(trackPanel->GetFirstSelectedTrack());