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>
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#include <wx/timer.h>
class SelectionController;
namespace agi {
namespace dispatch {
class Queue;
}
struct Context;
}
struct AssFileCommit;
struct ProjectProperties;
class SubsController {
agi::Context *context;
agi::signal::Connection undo_connection;
agi::signal::Connection active_line_connection;
agi::signal::Connection selection_connection;
agi::signal::Connection text_selection_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;
/// Version to use for the next commit
/// Needed to handle Save -> Undo -> Edit, which would result in the file
/// being marked unmodified if we reused commit IDs
int next_commit_id = 1;
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/// Timer for triggering autosaves
wxTimer autosave_timer;
/// Queue which autosaves are performed on
std::unique_ptr<agi::dispatch::Queue> autosave_queue;
/// A new file has been opened (filename)
agi::signal::Signal<agi::fs::path> FileOpen;
/// The file has been saved
agi::signal::Signal<> FileSave;
/// The filename of the currently open file, if any
agi::fs::path filename;
/// Set the filename, updating things like the MRU and last used path
void SetFileName(agi::fs::path const& file);
/// Autosave the file if there have been any chances since the last autosave
void AutoSave();
void OnCommit(AssFileCommit c);
void OnActiveLineChanged();
void OnSelectionChanged();
void OnTextSelectionChanged();
public:
SubsController(agi::Context *context);
~SubsController();
/// Set the selection controller to use
///
/// Required due to that the selection controller is the subtitles grid, and
/// so is created long after the subtitles controller
void SetSelectionController(SelectionController *selection_controller);
/// 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
ProjectProperties 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;
/// Can the file be saved in its current format?
bool CanSave() const;
/// The file is about to be saved
/// This signal is intended for adding metadata which is awkward or
/// expensive to always keep up to date
agi::signal::Signal<> UpdateProperties;
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;
};