Aegisub/src/subs_controller.h

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// Copyright (c) 2013, Thomas Goyne <plorkyeran@aegisub.org>
//
// Permission to use, copy, modify, and distribute this software for any
// purpose with or without fee is hereby granted, provided that the above
// copyright notice and this permission notice appear in all copies.
//
// THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
// WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
// MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
// ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
// WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
// ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
// OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
//
// Aegisub Project http://www.aegisub.org/
#include <libaegisub/fs_fwd.h>
#include <libaegisub/signal.h>
#include <boost/container/list.hpp>
#include <boost/filesystem/path.hpp>
#include <set>
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#include <wx/timer.h>
class AssEntry;
class AssFile;
struct AssFileCommit;
namespace agi { struct Context; }
class SubsController {
agi::Context *context;
agi::signal::Connection undo_connection;
struct UndoInfo;
boost::container::list<UndoInfo> undo_stack;
boost::container::list<UndoInfo> redo_stack;
/// Revision counter for undo coalescing and modified state tracking
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int commit_id = 0;
/// Last saved version of this file
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int saved_commit_id = 0;
/// Last autosaved version of this file
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int autosaved_commit_id = 0;
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/// Timer for triggering autosaves
wxTimer autosave_timer;
/// A new file has been opened (filename)
agi::signal::Signal<agi::fs::path> FileOpen;
/// The file is about to be saved
/// This signal is intended for adding metadata such as video filename,
/// frame number, etc. Ideally this would all be done immediately rather
/// than waiting for a save, but that causes (more) issues with undo
agi::signal::Signal<> FileSave;
/// The filename of the currently open file, if any
agi::fs::path filename;
void OnCommit(AssFileCommit c);
/// Set the filename, updating things like the MRU and last used path
void SetFileName(agi::fs::path const& file);
public:
SubsController(agi::Context *context);
/// The file's path and filename if any, or platform-appropriate "untitled"
agi::fs::path Filename() const;
/// Does the file have unsaved changes?
bool IsModified() const { return commit_id != saved_commit_id; };
/// @brief Load from a file
/// @param file File name
/// @param charset Character set of file or empty to autodetect
void Load(agi::fs::path const& file, std::string charset="");
/// @brief Save to a file
/// @param file Path to save to
/// @param encoding Encoding to use, or empty to let the writer decide (which usually means "App/Save Charset")
void Save(agi::fs::path const& file, std::string const& encoding="");
/// Close the currently open file (i.e. open a new blank file)
void Close();
/// If there are unsaved changes, asl the user if they want to save them
/// @param allow_cancel Let the user cancel the closing
/// @return wxYES, wxNO or wxCANCEL (note: all three are true in a boolean context)
int TryToClose(bool allow_cancel = true) const;
/// @brief Autosave the file if there have been any chances since the last autosave
/// @return File name used or empty if no save was performed
agi::fs::path AutoSave();
/// Can the file be saved in its current format?
bool CanSave() const;
DEFINE_SIGNAL_ADDERS(FileOpen, AddFileOpenListener)
DEFINE_SIGNAL_ADDERS(FileSave, AddFileSaveListener)
/// @brief Undo the last set of changes to the file
void Undo();
/// @brief Redo the last undone changes
void Redo();
/// Check if undo stack is empty
bool IsUndoStackEmpty() const { return undo_stack.size() <= 1; };
/// Check if redo stack is empty
bool IsRedoStackEmpty() const { return redo_stack.empty(); };
/// Get the description of the first undoable change
wxString GetUndoDescription() const;
/// Get the description of the first redoable change
wxString GetRedoDescription() const;
};