// Copyright (c) 2007, Rodrigo Braz Monteiro
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// $Id$

/// @file visual_tool_clip.cpp
/// @brief Rectangular clipping visual typesetting tool
/// @ingroup visual_ts

///////////
// Headers
#include "config.h"

#include "ass_dialogue.h"
#include "ass_file.h"
#include "subs_edit_box.h"
#include "subs_grid.h"
#include "utils.h"
#include "video_display.h"
#include "visual_tool_clip.h"

/// @brief Constructor 
/// @param _parent 
VisualToolClip::VisualToolClip(VideoDisplay *parent, VideoState const& video, wxToolBar *)
: VisualTool(parent, video)
, curX1(0)
, curY1(0)
, curX2(video.w)
, curY2(video.h)
, inverse(false)
{
	AssDialogue *line = GetActiveDialogueLine();
	if (line) GetLineClip(line,curX1,curY1,curX2,curY2,inverse);
}

/// @brief Draw 
void VisualToolClip::Draw() {
	// Get current line
	AssDialogue *line = GetActiveDialogueLine();
	if (!line) return;

	// Get position
	if (!dragging && !holding) GetLineClip(line,curX1,curY1,curX2,curY2,inverse);
	int dx1 = curX1;
	int dy1 = curY1;
	int dx2 = curX2;
	int dy2 = curY2;

	// Draw rectangle
	SetLineColour(colour[3],1.0f,2);
	SetFillColour(colour[3],0.0f);
	DrawRectangle(dx1,dy1,dx2,dy2);

	// Draw outside area
	SetLineColour(colour[3],0.0f);
	SetFillColour(wxColour(0,0,0),0.5f);
	if (inverse) {
		DrawRectangle(dx1,dy1,dx2,dy2);
	}
	else {
		DrawRectangle(0,0,video.w,dy1);
		DrawRectangle(0,dy2,video.w,video.h);
		DrawRectangle(0,dy1,dx1,dy2);
		DrawRectangle(dx2,dy1,video.w,dy2);
	}

	// Draw circles
	SetLineColour(colour[0]);
	SetFillColour(colour[1],0.5);
	DrawAllFeatures();
}

/// @brief Start holding 
bool VisualToolClip::InitializeHold() {
	startX = video.x;
	startY = video.y;
	curDiag->StripTag(L"\\clip");
	curDiag->StripTag(L"\\iclip");
	return true;
}

/// @brief Update hold 
void VisualToolClip::UpdateHold() {
	// Coordinates
	curX1 = startX;
	curY1 = startY;
	curX2 = video.x;
	curY2 = video.y;

	// Make sure 1 is smaller than 2
	if (curX1 > curX2) IntSwap(curX1,curX2);
	if (curY1 > curY2) IntSwap(curY1,curY2);

	// Limit to video area
	curX1 = MID(0,curX1,video.w);
	curX2 = MID(0,curX2,video.w);
	curY1 = MID(0,curY1,video.h);
	curY2 = MID(0,curY2,video.h);
	
	// Features
	PopulateFeatureList();
}

/// @brief Commit hold 
void VisualToolClip::CommitHold() {
	int x1 = curX1;
	int x2 = curX2;
	int y1 = curY1;
	int y2 = curY2;
	parent->ToScriptCoords(&x1, &y1);
	parent->ToScriptCoords(&x2, &y2);
	SetOverride(GetActiveDialogueLine(), inverse ? L"\\iclip" : L"\\clip",wxString::Format(L"(%i,%i,%i,%i)",x1,y1,x2,y2));
}

/// @brief Populate feature list 
void VisualToolClip::PopulateFeatureList() {
	// Clear
	if (features.size() != 4) {
		features.clear();
		features.resize(4);
	}

	// Top-left
	int i = 0;
	features[i].x = curX1;
	features[i].y = curY1;
	features[i].horiz = &features[1];
	features[i].vert = &features[2];
	features[i].type = DRAG_SMALL_CIRCLE;
	i++;

	// Top-right
	features[i].x = curX2;
	features[i].y = curY1;
	features[i].horiz = &features[0];
	features[i].vert = &features[3];
	features[i].type = DRAG_SMALL_CIRCLE;
	i++;

	// Bottom-left
	features[i].x = curX1;
	features[i].y = curY2;
	features[i].horiz = &features[3];
	features[i].vert = &features[0];
	features[i].type = DRAG_SMALL_CIRCLE;
	i++;

	// Bottom-right
	features[i].x = curX2;
	features[i].y = curY2;
	features[i].horiz = &features[2];
	features[i].vert = &features[1];
	features[i].type = DRAG_SMALL_CIRCLE;
	i++;
}

/// @brief Initialize 
/// @param feature 
bool VisualToolClip::InitializeDrag(ClipCorner &feature) {
	curDiag = GetActiveDialogueLine();
	curDiag->StripTag(L"\\clip");
	curDiag->StripTag(L"\\iclip");
	return true;
}

/// @brief Update drag 
/// @param feature 
void VisualToolClip::UpdateDrag(ClipCorner &feature) {
	// Update brothers
	feature.horiz->y = feature.y;
	feature.vert->x = feature.x;

	// Get "cur" from features
	curX1 = features[0].x;
	curX2 = features[3].x;
	curY1 = features[0].y;
	curY2 = features[3].y;

	// Make sure p1 < p2
	if (curX1 > curX2) IntSwap(curX1,curX2);
	if (curY1 > curY2) IntSwap(curY1,curY2);
}

/// @brief Done dragging 
/// @param feature 
void VisualToolClip::CommitDrag(ClipCorner &feature) {
	CommitHold();
}