// Copyright (c) 2006, Rodrigo Braz Monteiro
// All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are met:
//
//   * Redistributions of source code must retain the above copyright notice,
//     this list of conditions and the following disclaimer.
//   * Redistributions in binary form must reproduce the above copyright notice,
//     this list of conditions and the following disclaimer in the documentation
//     and/or other materials provided with the distribution.
//   * Neither the name of the Aegisub Group nor the names of its contributors
//     may be used to endorse or promote products derived from this software
//     without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
// AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
// ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
// LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
// CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
// SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
// INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
// CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
// ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
// POSSIBILITY OF SUCH DAMAGE.
//
// Aegisub Project http://www.aegisub.org/
//
// $Id$

/// @file subs_grid.cpp
/// @brief Subtitles grid control in main window
/// @ingroup main_ui
///

#include "config.h"

#ifndef AGI_PRE
#include <algorithm>
#include <utility>

#include <wx/clipbrd.h>
#include <wx/filename.h>
#include <wx/regex.h>
#include <wx/tokenzr.h>
#endif

#include "include/aegisub/audio_provider.h"
#include "ass_file.h"
#include "ass_karaoke.h"
#include "ass_override.h"
#include "ass_style.h"
#include "audio_box.h"
#include "audio_display.h"
#include "charset_conv.h"
#include "dialog_paste_over.h"
#include "frame_main.h"
#include "hotkeys.h"
#include "main.h"
#include "subs_edit_box.h"
#include "subs_grid.h"
#include "utils.h"
#include "video_context.h"
#include "video_display.h"

BEGIN_EVENT_TABLE(SubtitlesGrid, BaseGrid)
	EVT_KEY_DOWN(SubtitlesGrid::OnKeyDown)
	EVT_MENU(MENU_SWAP,SubtitlesGrid::OnSwap)
	EVT_MENU(MENU_DUPLICATE,SubtitlesGrid::OnDuplicate)
	EVT_MENU(MENU_DUPLICATE_NEXT_FRAME,SubtitlesGrid::OnDuplicateNextFrame)
	EVT_MENU(MENU_JOIN_CONCAT,SubtitlesGrid::OnJoinConcat)
	EVT_MENU(MENU_JOIN_REPLACE,SubtitlesGrid::OnJoinReplace)
	EVT_MENU(MENU_ADJOIN,SubtitlesGrid::OnAdjoin)
	EVT_MENU(MENU_ADJOIN2,SubtitlesGrid::OnAdjoin2)
	EVT_MENU(MENU_INSERT_BEFORE,SubtitlesGrid::OnInsertBefore)
	EVT_MENU(MENU_INSERT_AFTER,SubtitlesGrid::OnInsertAfter)
	EVT_MENU(MENU_INSERT_BEFORE_VIDEO,SubtitlesGrid::OnInsertBeforeVideo)
	EVT_MENU(MENU_INSERT_AFTER_VIDEO,SubtitlesGrid::OnInsertAfterVideo)
	EVT_MENU(MENU_COPY,SubtitlesGrid::OnCopyLines)
	EVT_MENU(MENU_PASTE,SubtitlesGrid::OnPasteLines)
	EVT_MENU(MENU_CUT,SubtitlesGrid::OnCutLines)
	EVT_MENU(MENU_DELETE,SubtitlesGrid::OnDeleteLines)
	EVT_MENU(MENU_SET_START_TO_VIDEO,SubtitlesGrid::OnSetStartToVideo)
	EVT_MENU(MENU_SET_END_TO_VIDEO,SubtitlesGrid::OnSetEndToVideo)
	EVT_MENU(MENU_SET_VIDEO_TO_START,SubtitlesGrid::OnSetVideoToStart)
	EVT_MENU(MENU_SET_VIDEO_TO_END,SubtitlesGrid::OnSetVideoToEnd)
	EVT_MENU(MENU_JOIN_AS_KARAOKE,SubtitlesGrid::OnJoinAsKaraoke)
	EVT_MENU(MENU_SPLIT_BY_KARAOKE,SubtitlesGrid::OnSplitByKaraoke)
	EVT_MENU(MENU_RECOMBINE,SubtitlesGrid::OnRecombine)
	EVT_MENU(MENU_AUDIOCLIP,SubtitlesGrid::OnAudioClip)
	EVT_MENU_RANGE(MENU_SHOW_COL,MENU_SHOW_COL+15,SubtitlesGrid::OnShowColMenu)
END_EVENT_TABLE()

/// @brief Constructor 
/// @param parentFr 
/// @param parent   
/// @param id       
/// @param pos      
/// @param size     
/// @param style    
/// @param name     
SubtitlesGrid::SubtitlesGrid(FrameMain* parentFr, wxWindow *parent, wxWindowID id, AssFile *subs, const wxPoint& pos, const wxSize& size, long style, const wxString& name)
: BaseGrid(parent,id,pos,size,style,name)
, ass(subs)
{
	byFrame = false;
	editBox = NULL;
	parentFrame = parentFr;
}

/// @brief Destructor 
SubtitlesGrid::~SubtitlesGrid() {
	ClearMaps();
}

/// @brief Popup menu 
/// @param alternate 
void SubtitlesGrid::OnPopupMenu(bool alternate) {
	// Alternate
	if (alternate) {
		const wxString strings[] = {
			_("Line Number"),
			_("Layer"),
			_("Start"),
			_("End"),
			_("Style"),
			_("Actor"),
			_("Effect"),
			_("Left"),
			_("Right"),
			_("Vert"),
		};

		// Create Menu
		wxMenu menu;
		for (size_t i=0;i<columns;i++) {
			menu.Append(MENU_SHOW_COL + i,strings[i],_T(""),wxITEM_CHECK)->Check(showCol[i]);
		}
		PopupMenu(&menu);

		return;
	}

	// Get selections
	bool continuous;
	wxArrayInt selections = GetSelection(&continuous);
	int sels = selections.Count();

	// Show menu if at least one is selected
	if (sels > 0) {
		wxMenu menu;
		bool state;

		// Insert
		state = (sels == 1);
		menu.Append(MENU_INSERT_BEFORE,_("&Insert (before)"),_T("Inserts a line before current"))->Enable(state);
		menu.Append(MENU_INSERT_AFTER,_("Insert (after)"),_T("Inserts a line after current"))->Enable(state);
		state = (sels == 1 && context->IsLoaded());
		menu.Append(MENU_INSERT_BEFORE_VIDEO,_("Insert at video time (before)"),_T("Inserts a line after current, starting at video time"))->Enable(state);
		menu.Append(MENU_INSERT_AFTER_VIDEO,_("Insert at video time (after)"),_T("Inserts a line after current, starting at video time"))->Enable(state);
		menu.AppendSeparator();

		// Duplicate selection
		menu.Append(MENU_DUPLICATE,_("&Duplicate"),_("Duplicate the selected lines"))->Enable(continuous);
		menu.Append(MENU_DUPLICATE_NEXT_FRAME,_("&Duplicate and shift by 1 frame"),_("Duplicate lines and shift by one frame"))->Enable(continuous && context->TimecodesLoaded());
		menu.Append(MENU_SPLIT_BY_KARAOKE,_("Split (by karaoke)"),_("Uses karaoke timing to split line into multiple smaller lines"))->Enable(sels > 0);

		// Swaps selection
		state = (sels == 2);
		menu.Append(MENU_SWAP,_("&Swap"),_("Swaps the two selected lines"))->Enable(state);

		// Join selection
		state = (sels >= 2 && continuous);
		menu.Append(MENU_JOIN_CONCAT,_("&Join (concatenate)"),_("Joins selected lines in a single one, concatenating text together"))->Enable(state);
		menu.Append(MENU_JOIN_REPLACE,_("Join (keep first)"),_("Joins selected lines in a single one, keeping text of first and discarding remaining"))->Enable(state);
		menu.Append(MENU_JOIN_AS_KARAOKE,_("Join (as Karaoke)"),_("Joins selected lines in a single one, making each line into a karaoke syllable"))->Enable(state);
		menu.AppendSeparator();

		// Adjoin selection
		state = (sels >= 1 && continuous);
		menu.Append(MENU_ADJOIN,_("&Make times continuous (change start)"),_("Changes times of subs so start times begin on previous's end time"))->Enable(state);
		menu.Append(MENU_ADJOIN2,_("&Make times continuous (change end)"),_("Changes times of subs so end times begin on next's start time"))->Enable(state);

		// Recombine selection
		state = (sels > 1);
		menu.Append(MENU_RECOMBINE,_("Recombine Lines"),_("Recombine subtitles when they have been split and merged"))->Enable(state);
		menu.AppendSeparator();

		//Make audio clip
		state = parentFrame->audioBox->audioDisplay->loaded==true;
		menu.Append(MENU_AUDIOCLIP,_("Create audio clip"),_("Create an audio clip of the selected line"))->Enable(state);
		menu.AppendSeparator();


		// Copy/cut/paste
		menu.Append(MENU_COPY,_("&Copy"),_("Copies selected lines to clipboard"));
		menu.Append(MENU_CUT,_("C&ut"),_("Cuts selected lines to clipboard"));
		menu.Append(MENU_PASTE,_("&Paste"),_("Paste lines from clipboard"));
		menu.AppendSeparator();

		// Delete
		menu.Append(MENU_DELETE,_("Delete"),_("Delete currently selected lines"));

		PopupMenu(&menu);
	}
}

/// @brief Process a show/hide column event 
/// @param event 
void SubtitlesGrid::OnShowColMenu(wxCommandEvent &event) {
	int item = event.GetId()-MENU_SHOW_COL;
	showCol[item] = !showCol[item];

	std::vector<bool> map(showCol, showCol + columns);
	OPT_SET("Subtitle/Grid/Column")->SetListBool(map);

	// Update
	SetColumnWidths();
	Refresh(false);
}

/// @brief Process keyboard events 
/// @param event 
void SubtitlesGrid::OnKeyDown(wxKeyEvent &event) {
	// Get key
#ifdef __APPLE__
	Hotkeys.SetPressed(event.GetKeyCode(),event.m_metaDown,event.m_altDown,event.m_shiftDown);
#else
	Hotkeys.SetPressed(event.GetKeyCode(),event.m_controlDown,event.m_altDown,event.m_shiftDown);
#endif

	// Get selection
	bool continuous = false;
	wxArrayInt sels = GetSelection(&continuous);
	int n_found = sels.Count();
	int n = 0;
	int n2 = 0;
	int nrows = GetRows();
	if (n_found > 0) {
		n = sels[0];
		n2 = sels[n_found-1];
	}

	if (n_found == 1) {
		// Move down
		if (Hotkeys.IsPressed(_T("Grid move row down"))) {
			if (n < nrows-1) {
				SwapLines(n,n+1);
				SelectRow(n+1);
				//editBox->SetToLine(n+1);
			}
			return;
		}

		// Move up
		if (Hotkeys.IsPressed(_T("Grid move row up"))) {
			if (n > 0) {
				SwapLines(n-1,n);
				SelectRow(n-1);
				//editBox->SetToLine(n-1);
			}
			return;
		}
	}

	if (n_found >= 1) {
		// Copy
		if (Hotkeys.IsPressed(_T("Copy"))) {
			CopyLines(GetSelection());
			return;
		}

		// Cut
		if (Hotkeys.IsPressed(_T("Cut"))) {
			CutLines(GetSelection());
			return;
		}

		// Paste
		if (Hotkeys.IsPressed(_T("Paste"))) {
			PasteLines(GetFirstSelRow());
			return;
		}

		// Delete
		if (Hotkeys.IsPressed(_T("Grid delete rows"))) {
			DeleteLines(GetSelection());
			return;
		}

		if (continuous) {
			// Duplicate
			if (Hotkeys.IsPressed(_T("Grid duplicate rows"))) {
				DuplicateLines(n,n2,false);
				return;
			}

			// Duplicate and shift
			if (context->TimecodesLoaded()) {
				if (Hotkeys.IsPressed(_T("Grid duplicate and shift one frame"))) {
					DuplicateLines(n,n2,true);
					return;
				}
			}
		}
	}

	event.Skip();
}

void SubtitlesGrid::OnDuplicate (wxCommandEvent &) {
	BeginBatch();
	wxArrayInt sels = GetSelection();
	DuplicateLines(sels.front(),sels.back());
	EndBatch();
}

void SubtitlesGrid::OnDuplicateNextFrame (wxCommandEvent &) {
	BeginBatch();
	wxArrayInt sels = GetSelection();
	DuplicateLines(sels.front(),sels.back(),true);
	EndBatch();
}

/// @brief Call swap 
void SubtitlesGrid::OnSwap (wxCommandEvent &) {
	BeginBatch();
	wxArrayInt sels = GetSelection();
	SwapLines(sels.front(),sels.back());
	EndBatch();
}

/// @brief Call join (concatenate) 
void SubtitlesGrid::OnJoinConcat (wxCommandEvent &) {
	BeginBatch();
	wxArrayInt sels = GetSelection();
	JoinLines(sels.front(),sels.back(),true);
	EndBatch();
}

/// @brief Call join (replace) 
void SubtitlesGrid::OnJoinReplace (wxCommandEvent &) {
	BeginBatch();
	wxArrayInt sels = GetSelection();
	JoinLines(sels.front(),sels.back(),false);
	EndBatch();
}

/// @brief Adjoin lines 
void SubtitlesGrid::OnAdjoin (wxCommandEvent &) {
	BeginBatch();
	wxArrayInt sels = GetSelection();
	AdjoinLines(sels.front(),sels.back(),true);
	EndBatch();
}

/// @brief DOCME
void SubtitlesGrid::OnAdjoin2 (wxCommandEvent &) {
	BeginBatch();
	wxArrayInt sels = GetSelection();
	AdjoinLines(sels.front(),sels.back(),false);
	EndBatch();
}

/// @brief Call join as karaoke 
void SubtitlesGrid::OnJoinAsKaraoke (wxCommandEvent &) {
	BeginBatch();
	wxArrayInt sels = GetSelection();
	JoinAsKaraoke(sels.front(),sels.back());
	EndBatch();
}

/// @brief Call split by karaoke 
void SubtitlesGrid::OnSplitByKaraoke (wxCommandEvent &) {
	BeginBatch();
	wxArrayInt sels = GetSelection();
	bool didSplit = false;
	for (int i = sels.size()-1; i >= 0; i--) {
		didSplit |= SplitLineByKaraoke(sels[i]);
	}
	if (didSplit) {
		ass->Commit(_("splitting"));
		CommitChanges();
	}
	EndBatch();
}

/// @brief Call insert before 
void SubtitlesGrid::OnInsertBefore (wxCommandEvent &) {
	BeginBatch();
	// Find line
	int n = GetFirstSelRow();

	// Create line to add
	AssDialogue *def = new AssDialogue;
	if (n == 0) {
		def->Start.SetMS(0);
		def->End = GetDialogue(n)->Start;
	}
	else if (GetDialogue(n-1)->End.GetMS() > GetDialogue(n)->Start.GetMS()) {
		def->Start.SetMS(GetDialogue(n)->Start.GetMS()-OPT_GET("Timing/Default Duration")->GetInt());
		def->End = GetDialogue(n)->Start;
	}
	else {
		def->Start = GetDialogue(n-1)->End;
		def->End = GetDialogue(n)->Start;
	}
	if (def->End.GetMS() < def->Start.GetMS()) def->End.SetMS(def->Start.GetMS()+OPT_GET("Timing/Default Duration")->GetInt());
	def->Style = GetDialogue(n)->Style;

	// Insert it
	InsertLine(def,n,false);
	SelectRow(n);
	SetActiveLine(def);
	EndBatch();
}

/// @brief Call insert after 
void SubtitlesGrid::OnInsertAfter (wxCommandEvent &) {
	BeginBatch();
	// Find line
	int n = GetFirstSelRow();
	int nrows = GetRows();

	// Create line to add
	AssDialogue *def = new AssDialogue;
	if (n == nrows-1) {
		def->Start = GetDialogue(n)->End;
		def->End = GetDialogue(n)->End;
		def->End.SetMS(def->End.GetMS()+OPT_GET("Timing/Default Duration")->GetInt());
	}
	else {
		def->Start = GetDialogue(n)->End;
		def->End = GetDialogue(n+1)->Start;
	}
	if (def->End.GetMS() < def->Start.GetMS()) def->End.SetMS(def->Start.GetMS()+OPT_GET("Timing/Default Duration")->GetInt());
	def->Style = GetDialogue(n)->Style;

	// Insert it
	InsertLine(def,n,true);
	SelectRow(n+1);
	SetActiveLine(def);
	EndBatch();
}

/// @brief Call insert before with video 
void SubtitlesGrid::OnInsertBeforeVideo (wxCommandEvent &) {
	BeginBatch();
	// Find line
	int n = GetFirstSelRow();

	// Create line to add
	AssDialogue *def = new AssDialogue;
	int video_ms = context->TimeAtFrame(context->GetFrameN(),agi::vfr::START);
	def->Start.SetMS(video_ms);
	def->End.SetMS(video_ms+OPT_GET("Timing/Default Duration")->GetInt());
	def->Style = GetDialogue(n)->Style;

	// Insert it
	InsertLine(def,n,false);
	SelectRow(n);
	SetActiveLine(def);
	EndBatch();
}

/// @brief Call insert after with video 
void SubtitlesGrid::OnInsertAfterVideo (wxCommandEvent &) {
	BeginBatch();
	// Find line
	int n = GetFirstSelRow();

	// Create line to add
	AssDialogue *def = new AssDialogue;
	int video_ms = context->TimeAtFrame(context->GetFrameN(),agi::vfr::START);
	def->Start.SetMS(video_ms);
	def->End.SetMS(video_ms+OPT_GET("Timing/Default Duration")->GetInt());
	def->Style = GetDialogue(n)->Style;

	// Insert it
	InsertLine(def,n,true);
	SelectRow(n+1);
	SetActiveLine(def);
	EndBatch();
}

/// Copy selection to clipboard
void SubtitlesGrid::OnCopyLines (wxCommandEvent &) {
	CopyLines(GetSelection());
}

/// Cuts selection to clipboard
void SubtitlesGrid::OnCutLines (wxCommandEvent &) {
	CutLines(GetSelection());
}

/// Paste from clipboard
void SubtitlesGrid::OnPasteLines (wxCommandEvent &) {
	PasteLines(GetFirstSelRow());
}

/// Copy selection to clipboard
void SubtitlesGrid::OnDeleteLines (wxCommandEvent &) {
	BeginBatch();
	DeleteLines(GetSelection());
	EndBatch();
}

/// @brief Set start to video pos 
void SubtitlesGrid::OnSetStartToVideo(wxCommandEvent &) {
	BeginBatch();
	SetSubsToVideo(true);
	EndBatch();
}

/// @brief Set end to video pos 
void SubtitlesGrid::OnSetEndToVideo(wxCommandEvent &) {
	BeginBatch();
	SetSubsToVideo(false);
	EndBatch();
}

/// @brief Set video pos to start 
void SubtitlesGrid::OnSetVideoToStart(wxCommandEvent &) {
	BeginBatch();
	SetVideoToSubs(true);
	EndBatch();
}

/// @brief Set video pos to end 
void SubtitlesGrid::OnSetVideoToEnd(wxCommandEvent &) {
	BeginBatch();
	SetVideoToSubs(false);
	EndBatch();
}

static void trim_text(AssDialogue *diag) {
	static wxRegEx start(L"^( |\\t|\\\\[nNh])+");
	static wxRegEx end(L"( |\\t|\\\\[nNh])+$");
	start.ReplaceFirst(&diag->Text, "");
	end.ReplaceFirst(&diag->Text, "");
}
static void expand_times(AssDialogue *src, AssDialogue *dst) {
	dst->Start.SetMS(std::min(dst->Start.GetMS(), src->Start.GetMS()));
	dst->End.SetMS(std::max(dst->End.GetMS(), src->End.GetMS()));
}

/// @brief Recombine 
void SubtitlesGrid::OnRecombine(wxCommandEvent &) {
	using namespace std;

	Selection selectedSet = GetSelectedSet();
	if (selectedSet.size() < 2) return;

	AssDialogue *activeLine = GetActiveLine();

	vector<AssDialogue*> sel;
	sel.reserve(selectedSet.size());
	copy(selectedSet.begin(), selectedSet.end(), back_inserter(sel));
	for_each(sel.begin(), sel.end(), trim_text);
	sort(sel.begin(), sel.end(), &AssFile::CompStart);

	typedef vector<AssDialogue*>::iterator diag_iter;
	diag_iter end = sel.end() - 1;
	for (diag_iter cur = sel.begin(); cur != end; ++cur) {
		AssDialogue *d1 = *cur;
		diag_iter d2 = cur + 1;

		// 1, 1+2 (or 2+1), 2 gets turned into 1, 2, 2 so kill the duplicate
		if (d1->Text == (*d2)->Text) {
			expand_times(d1, *d2);
			delete d1;
			ass->Line.remove(d1);
			continue;
		}

		// 1, 1+2, 1 turns into 1, 2, [empty]
		if (d1->Text.empty()) {
			delete d1;
			ass->Line.remove(d1);
			continue;
		}

		// 1, 1+2
		while (d2 <= end && (*d2)->Text.StartsWith(d1->Text, &(*d2)->Text)) {
			expand_times(*d2, d1);
			trim_text(*d2);
			++d2;
		}

		// 1, 2+1
		while (d2 <= end && (*d2)->Text.EndsWith(d1->Text, &(*d2)->Text)) {
			expand_times(*d2, d1);
			trim_text(*d2);
			++d2;
		}

		// 1+2, 2
		while (d2 <= end && d1->Text.EndsWith((*d2)->Text, &d1->Text)) {
			expand_times(d1, *d2);
			trim_text(d1);
			++d2;
		}

		// 2+1, 2
		while (d2 <= end && d1->Text.StartsWith((*d2)->Text, &d1->Text)) {
			expand_times(d1, *d2);
			trim_text(d1);
			++d2;
		}
	}

	ass->Commit(_("combining"));
	UpdateMaps();
	CommitChanges();

	// Remove now non-existent lines from the selection
	Selection lines;
	transform(ass->Line.begin(), ass->Line.end(), inserter(lines, lines.begin()), cast<AssDialogue*>());
	Selection newSel;
	set_intersection(lines.begin(), lines.end(), selectedSet.begin(), selectedSet.end(), inserter(newSel, newSel.begin()));

	if (newSel.empty()) return;

	// Restore selection
	SetSelectedSet(newSel);
	if (find(newSel.begin(), newSel.end(), activeLine) == newSel.end()) {
		activeLine = *newSel.begin();
	}
	SetActiveLine(activeLine);
}

/// @brief Export audio clip of line 
void SubtitlesGrid::OnAudioClip(wxCommandEvent &) {
	int64_t num_samples,start=0,end=0,temp;
	AudioDisplay *audioDisplay = parentFrame->audioBox->audioDisplay;
	AudioProvider *provider = audioDisplay->provider;
	AssDialogue *cur;
	wxArrayInt sel = GetSelection();

	num_samples = provider->GetNumSamples();
	
	for(unsigned int i=0;i!=sel.GetCount();i++) {
		cur = GetDialogue(sel[i]);
		
		temp = audioDisplay->GetSampleAtMS(cur->Start.GetMS());
		start = (i==0||temp<start)?temp:start;
		temp = audioDisplay->GetSampleAtMS(cur->End.GetMS());
		end = (i==0||temp>end)?temp:end;
	}

	if (start > num_samples) {
		wxMessageBox(_("The starting point is beyond the length of the audio loaded."),_("Error"));
		return;
	}
	if (start==end||end==0) {
		wxMessageBox(_("There is no audio to save."),_("Error"));
		return;
	}

	end=(end>num_samples)?num_samples:end;


	wxString filename = wxFileSelector(_("Save audio clip"),_T(""),_T(""),_T("wav"),_T(""),wxFD_SAVE|wxFD_OVERWRITE_PROMPT,this);

	if (!filename.empty()) {
		std::ofstream outfile(filename.mb_str(csConvLocal),std::ios::binary);
		
		size_t bufsize=(end-start)*provider->GetChannels()*provider->GetBytesPerSample();
		int intval;
		short shortval;

		outfile << "RIFF";
		outfile.write((char*)&(intval=bufsize+36),4);
		outfile<< "WAVEfmt ";
		outfile.write((char*)&(intval=16),4);
		outfile.write((char*)&(shortval=1),2);
		outfile.write((char*)&(shortval=provider->GetChannels()),2);
		outfile.write((char*)&(intval=provider->GetSampleRate()),4);
		outfile.write((char*)&(intval=provider->GetSampleRate()*provider->GetChannels()*provider->GetBytesPerSample()),4);
		outfile.write((char*)&(intval=provider->GetChannels()*provider->GetBytesPerSample()),2);
		outfile.write((char*)&(shortval=provider->GetBytesPerSample()<<3),2);
		outfile << "data";
		outfile.write((char*)&bufsize,4);

		//samples per read
		size_t spr = 65536/(provider->GetBytesPerSample()*provider->GetChannels());
		for(int64_t i=start;i<end;i+=spr) {
			int len=(i+(int64_t)spr>end)?(end-i):spr;
			bufsize=len*(provider->GetBytesPerSample()*provider->GetChannels());
			void *buf = malloc(bufsize);
			if (buf) {
				provider->GetAudio(buf,i,len);
				outfile.write((char*)buf,bufsize);
				free(buf);
			}
			else if (spr>128) {
				//maybe we can allocate a smaller amount of memory
				i-=spr; //effectively redo this loop again
				spr=128;
			}
			else {
				wxMessageBox(_("Couldn't allocate memory."),_("Error"),wxICON_ERROR | wxOK);
				break; // don't return, we need to close the file
			}
		}
		
		outfile.close();
	}
}

/// @brief Clears grid and sets it to default 
/// @param _ass 
void SubtitlesGrid::LoadDefault () {
	ass->LoadDefault();
	ClearMaps();
	UpdateMaps();

	SetActiveLine(GetDialogue(0));
	SelectRow(0);
}

/// @brief Update internal data structures
void SubtitlesGrid::UpdateMaps(bool preserve_selected_rows) {
	BaseGrid::UpdateMaps(preserve_selected_rows);

	if (editBox) {
		editBox->UpdateGlobals();
	}
}

/// @brief Swaps two lines 
/// @param n1 
/// @param n2 
void SubtitlesGrid::SwapLines(int n1,int n2) {
	AssDialogue *dlg1 = GetDialogue(n1);
	AssDialogue *dlg2 = GetDialogue(n2);
	if (n1 == 0 || n2 == 0) return;
	
	std::swap(*dlg1, *dlg2);

	ass->Commit(_("swap lines"));
	CommitChanges();
}

/// @brief Insert a line 
/// @param line   
/// @param n      
/// @param after  
/// @param update 
void SubtitlesGrid::InsertLine(AssDialogue *line,int n,bool after,bool update) {
	AssDialogue *rel_line = GetDialogue(n);
	entryIter pos = std::find(ass->Line.begin(), ass->Line.end(), rel_line);
	if (after) ++pos;

	entryIter newIter = ass->Line.insert(pos,line);
	BaseGrid::UpdateMaps();

	// Update
	if (update) {
		ass->Commit(_("line insertion"));
		CommitChanges();
	}
}

void SubtitlesGrid::CopyLines(wxArrayInt target) {
	// Prepare text
	wxString data = _T("");
	AssDialogue *cur;
	int nrows = target.Count();
	bool first = true;
	for (int i=0;i<nrows;i++) {
		if (!first) data += _T("\r\n");
		first = false;
		cur = GetDialogue(target[i]);
		data += cur->GetEntryData();
	}

	// Send to clipboard
	if (wxTheClipboard->Open()) {
		wxTheClipboard->SetData(new wxTextDataObject(data));
		wxTheClipboard->Close();
	}
}

void SubtitlesGrid::CutLines(wxArrayInt target) {
	BeginBatch();
	CopyLines(target);
	DeleteLines(target);
	EndBatch();
}

/// @brief Paste lines from clipboard
/// @param n         
/// @param pasteOver 
void SubtitlesGrid::PasteLines(int n,bool pasteOver) {
	BeginBatch();

	// Prepare text
	wxString data;

	// Read from clipboard
	if (wxTheClipboard->Open()) {
		if (wxTheClipboard->IsSupported(wxDF_TEXT)) {
			wxTextDataObject rawdata;
			wxTheClipboard->GetData(rawdata);
			data = rawdata.GetText();
		}
		wxTheClipboard->Close();
	}

	// Check if it actually got anything
	if (!data.empty()) {
		// Insert data
		int inserted = 0;
		std::vector<bool> pasteOverOptions;
		wxStringTokenizer token (data,_T("\r\n"),wxTOKEN_STRTOK);
		while (token.HasMoreTokens()) {
			// Convert data into an AssDialogue
			wxString curdata = token.GetNextToken();
			curdata.Trim(true);
			curdata.Trim(false);
			AssDialogue *curdiag;
			try { 
				// Try to interpret the line as an ASS line
				curdiag = new AssDialogue(curdata);
			}
			catch (...) {
				// Line didn't parse correctly, assume it's plain text that
				// should be pasted in the Text field only
				curdiag = new AssDialogue();
				curdiag->Text = curdata;
				// Make sure pasted plain-text lines always are blank-timed
				curdiag->Start.SetMS(0);
				curdiag->End.SetMS(0);
			}

			// Paste over
			if (pasteOver) {
				if (n+inserted < GetRows()) {
					// Get list of options to paste over, if not asked yet
					if (pasteOverOptions.empty()) {
						DialogPasteOver diag(NULL, pasteOverOptions);
						if (!diag.ShowModal()) {
							delete curdiag;
							return;
						}
					}

					// Paste over
					AssDialogue *target = GetDialogue(n+inserted);
					if (pasteOverOptions[0]) target->Layer = curdiag->Layer;
					if (pasteOverOptions[1]) target->Start = curdiag->Start;
					if (pasteOverOptions[2]) target->End = curdiag->End;
					if (pasteOverOptions[3]) target->Style = curdiag->Style;
					if (pasteOverOptions[4]) target->Actor = curdiag->Actor;
					if (pasteOverOptions[5]) target->Margin[0] = curdiag->Margin[0];
					if (pasteOverOptions[6]) target->Margin[1] = curdiag->Margin[1];
					if (pasteOverOptions[7]) target->Margin[2] = curdiag->Margin[2];
					if (pasteOverOptions[8]) target->Effect = curdiag->Effect;
					if (pasteOverOptions[9]) target->Text = curdiag->Text;
				}
				delete curdiag;
			}

			// Paste normally
			else InsertLine(curdiag,n+inserted,false,false);

			// Increment insertion
			inserted++;
		}

		// Update data post-insertion
		if (inserted > 0) {
			// Commit
			UpdateMaps();
			ass->Commit(_("paste"));
			CommitChanges();

			// Set selection
			if (!pasteOver) {
				Selection newsel;
				for (int i=n;i<n+inserted;i++) {
					newsel.insert(GetDialogue(i));
				}
				SetSelectedSet(newsel);
				SetActiveLine(GetDialogue(GetFirstSelRow()));
			}
		}
	}
	EndBatch();
}

void SubtitlesGrid::DeleteLines(wxArrayInt target, bool flagModified) {
	entryIter before_first = std::find_if(ass->Line.begin(), ass->Line.end(), cast<AssDialogue*>()); --before_first;
	int old_active_line_index = GetDialogueIndex(GetActiveLine());

	int row = -1;
	int deleted = 0;
	for (entryIter cur = ass->Line.begin(); cur != ass->Line.end();) {
		if (dynamic_cast<AssDialogue*>(*cur) && ++row == target[deleted]) {
			cur = ass->Line.erase(cur);
			++deleted;
			if (deleted == target.size()) break;
		}
		else {
			++cur;
		}
	}

	// Add default line if file was wiped
	if (GetRows() == deleted) {
		AssDialogue *def = new AssDialogue;
		++before_first;
		ass->Line.insert(before_first, def);
		old_active_line_index = 0;
	}

	UpdateMaps();

	if (flagModified) {
		ass->Commit(_("delete"));
		CommitChanges();
	}
}

void SubtitlesGrid::JoinLines(int n1,int n2,bool concat) {
	int min_ms = INT_MAX;
	int max_ms = INT_MIN;
	wxString finalText;

	// Collect data
	AssDialogue *cur;
	int start,end;
	bool gotfirst = false;
	bool gottime = false;
	for (int i=n1;i<=n2;i++) {
		// Get start and end time of current line
		cur = GetDialogue(i);
		start = cur->Start.GetMS();
		end = cur->End.GetMS();

		// Don't take the timing of zero lines
		if (start != 0 || end != 0) {
			if (start < min_ms) min_ms = start;
			if (end > max_ms) max_ms = end;
			gottime = true;
		}

		// Set text
		if (concat || !gotfirst) {
			if (gotfirst) finalText += _T("\\N");
			gotfirst = true;
			finalText += cur->Text;
		}
	}

	// If it didn't get any times, then it's probably because they were all 0 lines.
	if (!gottime) {
		min_ms = 0;
		max_ms = 0;
	}

	// Apply settings to first line
	cur = GetDialogue(n1);
	cur->Start.SetMS(min_ms);
	cur->End.SetMS(max_ms);
	cur->Text = finalText;

	// Delete remaining lines (this will auto commit)
	DeleteLines(GetRangeArray(n1+1,n2), false);

	ass->Commit(_("join lines"));
	CommitChanges();

	// Select new line
	SetActiveLine(cur);
	SelectRow(n1);
}

void SubtitlesGrid::AdjoinLines(int n1,int n2,bool setStart) {
	if (n1 == n2) {
		if (setStart) {
			--n1;
		}
		else {
			++n2;
		}
	}
	// Set start
	if (setStart) {
		AssDialogue *prev = GetDialogue(n1);
		AssDialogue *cur;
		for (int i=n1+1;i<=n2;i++) {
			cur = GetDialogue(i);
			if (!cur) return;
			cur->Start = prev->End;
			prev = cur;
		}
	}

	// Set end
	else {
		AssDialogue *next;
		AssDialogue *cur = GetDialogue(n1);
		for (int i=n1;i<n2;i++) {
			next = GetDialogue(i+1);
			if (!next) return;
			cur->End = next->Start;
			cur = next;
		}
	}

	ass->Commit(_("adjoin"));
	CommitChanges();
}

void SubtitlesGrid::JoinAsKaraoke(int n1,int n2) {
	wxString finalText = _T("");

	// Collect data
	AssDialogue *cur;
	int start,end;
	int firststart = 0;
	int lastend = -1;
	int len1,len2;
	for (int i=n1;i<=n2;i++) {
		cur = GetDialogue(i);

		// Get times
		start = cur->Start.GetMS();
		end = cur->End.GetMS();

		// Get len
		if (lastend == -1) {
			lastend = start;
			firststart = start;
		}
		len1 = (start - lastend) / 10;
		len2 = (end - start) / 10;

		// Create text
		if (len1 != 0) finalText += _T("{\\k") + wxString::Format(_T("%i"),len1) + _T("}");
		finalText += _T("{\\k") + wxString::Format(_T("%i"),len2) + _T("}") + cur->Text;
		lastend = end;
	}

	// Apply settings to first line
	cur = GetDialogue(n1);
	cur->Start.SetMS(firststart);
	cur->End.SetMS(lastend);
	cur->Text = finalText;

	// Delete remaining lines (this will auto commit)
	DeleteLines(GetRangeArray(n1+1,n2), false);

	ass->Commit(_("join as karaoke"));
	CommitChanges();

	// Select new line
	SetActiveLine(cur);
	SelectRow(n1);
}

void SubtitlesGrid::DuplicateLines(int n1,int n2,bool nextFrame) {
	AssDialogue *cur;
	bool update = false;
	int step=0;
	for (int i=n1;i<=n2;i++) {
		// Create
		if (i == n2) update = true;
		cur = new AssDialogue(GetDialogue(i)->GetEntryData());

		// Shift to next frame
		if (nextFrame) {
			int posFrame = context->FrameAtTime(cur->End.GetMS(),agi::vfr::END) + 1;
			cur->Start.SetMS(context->TimeAtFrame(posFrame,agi::vfr::START));
			cur->End.SetMS(context->TimeAtFrame(posFrame,agi::vfr::END));
		}

		// Insert
		InsertLine(cur,n2+step,true,update);
		step++;
	}

	// Select new lines
	Selection newsel;
	for (int i=n1;i<=n2;i++) {
		newsel.insert(GetDialogue(i+step));
	}
	SetSelectedSet(newsel);
	SetActiveLine(GetDialogue(n1+step));
}

void SubtitlesGrid::ShiftLineByTime(int n,int len,int type) {
	assert(type >= 0 && type <= 2);
	AssDialogue *cur = GetDialogue(n);

	if (type != 2) cur->Start.SetMS(cur->Start.GetMS() + len);
	if (type != 1) cur->End.SetMS(cur->End.GetMS() + len);
}

void SubtitlesGrid::ShiftLineByFrames(int n,int len,int type) {
	assert(type >= 0 && type <= 2);
	AssDialogue *cur = GetDialogue(n);

	if (type != 2) cur->Start.SetMS(context->TimeAtFrame(len + context->FrameAtTime(cur->Start.GetMS(),agi::vfr::START),agi::vfr::START));
	if (type != 1) cur->End.SetMS(context->TimeAtFrame(len + context->FrameAtTime(cur->End.GetMS(),agi::vfr::END),agi::vfr::END));
}

void SubtitlesGrid::SplitLine(AssDialogue *n1,int pos,bool estimateTimes) {
	AssDialogue *n2 = new AssDialogue(*n1);
	InsertLine(n2,GetDialogueIndex(n1),true,false);

	wxString orig = n1->Text;
	n1->Text = orig.Left(pos).Trim(true); // Trim off trailing whitespace
	n2->Text = orig.Mid(pos).Trim(false); // Trim off leading whitespace

	if (estimateTimes) {
		double splitPos = double(pos)/orig.Length();
		int splitTime = (int)((n1->End.GetMS() - n1->Start.GetMS())*splitPos) + n1->Start.GetMS();
		n1->End.SetMS(splitTime);
		n2->Start.SetMS(splitTime);
	}

	ass->Commit(_("split"));
	CommitChanges(false);
}

bool SubtitlesGrid::SplitLineByKaraoke(int lineNumber) {
	AssDialogue *line = GetDialogue(lineNumber);

	line->ParseASSTags();
	AssKaraokeVector syls;
	ParseAssKaraokeTags(line, syls);
	line->ClearBlocks();

	// If there's only 1 or 0 syllables, splitting would be counter-productive.
	// 1 syllable means there's no karaoke tags in the line at all and that is
	// the case that triggers bug #929.
	if (syls.size() < 2) return false;

	// Insert a new line for each syllable
	int start_ms = line->Start.GetMS();
	int nextpos = lineNumber;
	for (AssKaraokeVector::iterator syl = syls.begin(); syl != syls.end(); ++syl)
	{
		// Skip blank lines
		if (syl->unstripped_text.IsEmpty()) continue;

		AssDialogue *nl = new AssDialogue(line->GetEntryData());
		nl->Start.SetMS(start_ms);
		start_ms += syl->duration * 10;
		nl->End.SetMS(start_ms);
		nl->Text = syl->unstripped_text;
		InsertLine(nl, nextpos++, true, false);
	}

	// Remove the source line
	{
		wxArrayInt oia;
		oia.Add(lineNumber);
		DeleteLines(oia, false);
	}

	return true;
}

void SubtitlesGrid::CommitChanges(bool ebox, bool video, bool autosave) {
	if (video && context->IsLoaded()) {
		bool playing = false;
		if (context->IsPlaying()) {
			playing = true;
			context->Stop();
		}

		context->Refresh();

		if (playing) context->Play();
	}

	if (autosave) {
		// Autosave if option is enabled
		if (OPT_GET("App/Auto/Save on Every Change")->GetBool()) {
			if (ass->IsModified() && !ass->filename.IsEmpty()) parentFrame->SaveSubtitles(false);
		}

		// Update parent frame
		parentFrame->UpdateTitle();
		SetColumnWidths();
		Refresh(false);
	}
	if (ebox) {
		editBox->Update(false, false);
	}
}

void SubtitlesGrid::SetSubsToVideo(bool start) {
	if (!context->IsLoaded()) return;

	// Get new time
	int ms = context->TimeAtFrame(context->GetFrameN(),start ? agi::vfr::START : agi::vfr::END);

	// Update selection
	wxArrayInt sel = GetSelection();
	bool modified = false;
	for (size_t i=0;i<sel.Count();i++) {
		AssDialogue *cur = GetDialogue(sel[i]);
		if (cur) {
			modified = true;
			if (start) cur->Start.SetMS(ms);
			else cur->End.SetMS(ms);
		}
	}

	if (modified) {
		ass->Commit(_("timing"));
		CommitChanges();
		editBox->Update(true);
	}
}

void SubtitlesGrid::SetVideoToSubs(bool start) {
	wxArrayInt sel = GetSelection();
	if (sel.Count() == 0) return;
	AssDialogue *cur = GetDialogue(sel[0]);
	if (cur) {
		if (start) 
			context->JumpToTime(cur->Start.GetMS());
		else 
			context->JumpToTime(cur->End.GetMS(), agi::vfr::END);
	}
}



/// @brief Retrieve a list of selected lines in the actual ASS file (ie. not as displayed in the grid but as represented in the file)
/// @return 
///
std::vector<int> SubtitlesGrid::GetAbsoluteSelection() {
	std::vector<int> result;
	result.reserve(GetNumberSelection());

	Selection sel;
	GetSelectedSet(sel);

	int line_index = 0;
	for (entryIter it = ass->Line.begin(); it != ass->Line.end(); ++it, ++line_index) {
		if (sel.find(dynamic_cast<AssDialogue*>(*it)) != sel.end())
			result.push_back(line_index);
	}

	return result;
}

/// @brief Update list of selected lines from absolute selection
/// @param selection 
///
void SubtitlesGrid::SetSelectionFromAbsolute(std::vector<int> &selection) {
	Selection newsel;

	std::sort(selection.begin(), selection.end());

	int i = 0;
	std::list<AssEntry*>::iterator j = ass->Line.begin();
	
	for (size_t selveci = 0; selveci < selection.size(); ++selveci) {
		while (i != selection[selveci] && j != ass->Line.end()) ++i, ++j;
		if (j == ass->Line.end()) break; /// @todo Report error somehow
		AssDialogue *dlg = dynamic_cast<AssDialogue*>(*j);
		if (dlg) newsel.insert(dlg);
	}

	SetSelectedSet(newsel);
}