/*
 * (c) Copyright Ascensio System SIA 2010-2024
 *
 * This program is a free software product. You can redistribute it and/or
 * modify it under the terms of the GNU Affero General Public License (AGPL)
 * version 3 as published by the Free Software Foundation. In accordance with
 * Section 7(a) of the GNU AGPL its Section 15 shall be amended to the effect
 * that Ascensio System SIA expressly excludes the warranty of non-infringement
 * of any third-party rights.
 *
 * This program is distributed WITHOUT ANY WARRANTY; without even the implied
 * warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR  PURPOSE. For
 * details, see the GNU AGPL at: http://www.gnu.org/licenses/agpl-3.0.html
 *
 * You can contact Ascensio System SIA at 20A-6 Ernesta Birznieka-Upish
 * street, Riga, Latvia, EU, LV-1050.
 *
 * The  interactive user interfaces in modified source and object code versions
 * of the Program must display Appropriate Legal Notices, as required under
 * Section 5 of the GNU AGPL version 3.
 *
 * Pursuant to Section 7(b) of the License you must retain the original Product
 * logo when distributing the program. Pursuant to Section 7(e) we decline to
 * grant you any rights under trademark law for use of our trademarks.
 *
 * All the Product's GUI elements, including illustrations and icon sets, as
 * well as technical writing content are licensed under the terms of the
 * Creative Commons Attribution-ShareAlike 4.0 International. See the License
 * terms at http://creativecommons.org/licenses/by-sa/4.0/legalcode
 *
 */

"use strict";

(function (/** Window */window, undefined) {

	/*
	 * Import
	 * -----------------------------------------------------------------------------
	 */
	var FontStyle = AscFonts.FontStyle;

	var asc = window["Asc"];
	var asc_round = asc.round;
	var asc_floor = asc.floor;

	function colorObjToAscColor(color) {
		if (!color) {
			return AscCommon.CreateAscColorCustom(0, 0, 0, true);
		}

		var oRes = null;
		var r = color.getR();
		var g = color.getG();
		var b = color.getB();
		var bTheme = false;
		if (color instanceof AscCommonExcel.ThemeColor && null != color.theme) {
			var array_colors_types = [6, 15, 7, 16, 0, 1, 2, 3, 4, 5];
			var themePresentation = array_colors_types[color.theme];
			var tintExcel = 0;
			if (null != color.tint) {
				tintExcel = color.tint;
			}
			var tintPresentation = 0;
			var basecolor = AscCommonExcel.g_oColorManager.getThemeColor(color.theme);
			var oThemeColorTint = AscCommonExcel.g_oThemeColorsDefaultModsSpreadsheet[AscCommon.GetDefaultColorModsIndex(
				basecolor.getR(), basecolor.getG(), basecolor.getB())];
			if (null != oThemeColorTint) {
				for (var i = 0, length = oThemeColorTint.length; i < length; ++i) {
					var cur = oThemeColorTint[i];
					//0.005 установлено экспериментально
					if (Math.abs(cur - tintExcel) < 0.005) {
						bTheme = true;
						tintPresentation = i;
						break;
					}
				}
			}
			if (bTheme) {
				oRes = new Asc.asc_CColor();
				oRes.r = r;
				oRes.g = g;
				oRes.b = b;
				oRes.a = 255;
				oRes.type = Asc.c_oAscColor.COLOR_TYPE_SCHEME;
				oRes.value = themePresentation;
			}
		}
		if (!bTheme) {
			oRes = AscCommon.CreateAscColorCustom(r, g, b);
		}
		return oRes;
	}

	var oldPpi = undefined, cvt = undefined;

	/**
	 * Gets ratio to convert units
	 * @param {Number} fromUnits  Units (0=px, 1=pt, 2=in, 3=mm)
	 * @param {Number} toUnits    Units (0=px, 1=pt, 2=in, 3=mm)
	 * @param {Number} ppi        Points per inch
	 * @return {Number}  Ratio
	 */
	function getCvtRatio(fromUnits, toUnits, ppi) {
		if (ppi !== oldPpi || oldPpi === undefined) {
			var _ppi = 1 / ppi, _72 = 1 / 72, _25_4 = 1 / 25.4;
			cvt = [/*    px          pt       in        mm    */
				/*px*/[1, 72 * _ppi, _ppi, 25.4 * _ppi], /*pt*/[ppi * _72, 1, _72, 25.4 * _72], /*in*/
				[ppi, 72, 1, 25.4], /*mm*/[ppi * _25_4, 72 * _25_4, _25_4, 1]];
			oldPpi = ppi;
		}
		return cvt[fromUnits][toUnits];
	}

	/** @const */
	var MATRIX_ORDER_PREPEND = AscCommon.MATRIX_ORDER_PREPEND;
	var MATRIX_ORDER_APPEND = AscCommon.MATRIX_ORDER_APPEND;

	/**
	 * @constructor
	 */
	function Matrix() {
		if (!(this instanceof Matrix)) {
			return new Matrix();
		}

		this.sx = 1.0;
		this.shx = 0.0;
		this.shy = 0.0;
		this.sy = 1.0;
		this.tx = 0.0;
		this.ty = 0.0;

		return this;
	}

	Matrix.prototype.reset = function () {
		this.sx = 1.0;
		this.shx = 0.0;
		this.shy = 0.0;
		this.sy = 1.0;
		this.tx = 0.0;
		this.ty = 0.0;
	};

	Matrix.prototype.assign = function (sx, shx, shy, sy, tx, ty) {
		this.sx = sx;
		this.shx = shx;
		this.shy = shy;
		this.sy = sy;
		this.tx = tx;
		this.ty = ty;
	};

	Matrix.prototype.copyFrom = function (matrix) {
		this.sx = matrix.sx;
		this.shx = matrix.shx;
		this.shy = matrix.shy;
		this.sy = matrix.sy;
		this.tx = matrix.tx;
		this.ty = matrix.ty;
	};

	Matrix.prototype.clone = function () {
		var m = new Matrix();
		m.copyFrom(this);
		return m;
	};

	Matrix.prototype.multiply = function (matrix, order) {
		if (MATRIX_ORDER_PREPEND === order) {
			var m = matrix.clone();
			m.multiply(this, MATRIX_ORDER_APPEND);
			this.copyFrom(m);
		} else {
			var t0 = this.sx * matrix.sx + this.shy * matrix.shx;
			var t2 = this.shx * matrix.sx + this.sy * matrix.shx;
			var t4 = this.tx * matrix.sx + this.ty * matrix.shx + matrix.tx;
			this.shy = this.sx * matrix.shy + this.shy * matrix.sy;
			this.sy = this.shx * matrix.shy + this.sy * matrix.sy;
			this.ty = this.tx * matrix.shy + this.ty * matrix.sy + matrix.ty;
			this.sx = t0;
			this.shx = t2;
			this.tx = t4;
		}
	};

	Matrix.prototype.translate = function (x, y, order) {
		var m = new Matrix();
		m.tx = x;
		m.ty = y;
		this.multiply(m, order);
	};

	Matrix.prototype.scale = function (x, y, order) {
		var m = new Matrix();
		m.sx = x;
		m.sy = y;
		this.multiply(m, order);
	};

	Matrix.prototype.rotate = function (a, order) {
		var m = new Matrix();
		var rad = AscCommon.deg2rad(a);
		m.sx = Math.cos(rad);
		m.shx = Math.sin(rad);
		m.shy = -Math.sin(rad);
		m.sy = Math.cos(rad);
		this.multiply(m, order);
	};

	Matrix.prototype.rotateAt = function (a, x, y, order) {
		this.translate(-x, -y, order);
		this.rotate(a, order);
		this.translate(x, y, order);
	};

	Matrix.prototype.determinant = function () {
		return this.sx * this.sy - this.shy * this.shx;
	};

	Matrix.prototype.invert = function () {
		var det = this.determinant();
		if (0.0001 > det) {
			return;
		}
		var d = 1 / det;

		var t0 = this.sy * d;
		this.sy = this.sx * d;
		this.shy = -this.shy * d;
		this.shx = -this.shx * d;

		var t4 = -this.tx * t0 - this.ty * this.shx;
		this.ty = -this.tx * this.shy - this.ty * this.sy;

		this.sx = t0;
		this.tx = t4;
	};

	Matrix.prototype.transformPointX = function (x, y) {
		return x * this.sx + y * this.shx + this.tx;
	};

	Matrix.prototype.transformPointY = function (x, y) {
		return x * this.shy + y * this.sy + this.ty;
	};

	/** Calculates rotation angle */
	Matrix.prototype.getRotation = function () {
		var x1 = 0.0;
		var y1 = 0.0;
		var x2 = 1.0;
		var y2 = 0.0;
		this.transformPoint(x1, y1);
		this.transformPoint(x2, y2);
		var a = Math.atan2(y2 - y1, x2 - x1);
		return AscCommon.rad2deg(a);
	};

	/**
	 * Creates text metrics
	 * -----------------------------------------------------------------------------
	 * @constructor
	 * @param {Number} width
	 * @param {Number} height
	 * @param {Number} lineHeight
	 * @param {Number} baseline
	 * @param {Number} descender
	 * @param {Number} fontSize
	 * @param {Number} widthBB
	 *
	 * @memberOf Asc
	 */
	function TextMetrics(width, height, lineHeight, baseline, descender, fontSize, widthBB) {
		this.width = width || 0;
		this.height = height || 0;
		this.lineHeight = lineHeight || 0;
		this.baseline = baseline || 0;
		this.descender = descender || 0;
		this.fontSize = fontSize || 0;
		this.widthBB = widthBB || 0;

		return this;
	}


	/**
	 * Creates font metrics
	 * -----------------------------------------------------------------------------
	 * @constructor
	 *
	 * @memberOf Asc
	 */
	function FontMetrics() {
		this.ascender = 0;
		this.descender = 0;
		this.lineGap = 0;

		this.nat_scale = 0;
		this.nat_y1 = 0;
		this.nat_y2 = 0;
	}

	FontMetrics.prototype.clone = function () {
		var res = new FontMetrics();
		res.ascender = this.ascender;
		res.descender = this.descender;
		res.lineGap = this.lineGap;

		res.nat_scale = this.nat_scale;
		res.nat_y1 = this.nat_y1;
		res.nat_y2 = this.nat_y2;
		return res;
	};

	function NativeContext() {
		this.ctx = window["native"];
	}

	NativeContext.prototype.save = function () {
		this.ctx["PD_Save"]();
	};
	NativeContext.prototype.restore = function () {
		this.ctx["PD_Restore"]();
	};
	NativeContext.prototype.rect = function (x, y, w, h) {
		this.ctx["PD_rect"](x, y, w, h);
	};
	NativeContext.prototype.clip = function () {
		this.ctx["PD_clip"]();
	};
	NativeContext.prototype.fill = function () {
		this.ctx["PD_Fill"]();
	};
	NativeContext.prototype.stroke = function () {
		this.ctx["PD_Stroke"]();
	};
	NativeContext.prototype.fillRect = function (x, y, w, h) {
		this.rect(x, y, w, h);
		this.fill();
	};
	NativeContext.prototype.strokeRect = function (x, y, w, h) {
		this.rect(x, y, w, h);
		this.stroke();
	};
	NativeContext.prototype.beginPath = function () {
		this.ctx["PD_PathStart"]();
	};
	NativeContext.prototype.closePath = function () {
		this.ctx["PD_PathClose"]();
	};
	NativeContext.prototype.moveTo = function (x, y) {
		this.ctx["PD_PathMoveTo"](x, y);
	};
	NativeContext.prototype.lineTo = function (x, y) {
		this.ctx["PD_PathLineTo"](x, y);
	};
	NativeContext.prototype.lineHor = function (x1, y, x2) {
		this.ctx["PD_PathMoveTo"](x1, y);
		this.ctx["PD_PathLineTo"](x2, y);
	};
	NativeContext.prototype.lineVer = function (x, y1, y2) {
		this.ctx["PD_PathMoveTo"](x, y1);
		this.ctx["PD_PathLineTo"](x, y2);
	};
	NativeContext.prototype.bezierCurveTo = function (x1, y1, x2, y2, x3, y3) {
		this.ctx["PD_PathCurveTo"](x1, y1, x2, y2, x3, y3);
	};
	NativeContext.prototype.setStrokeStyle = function (r, g, b, a) {
		this.ctx["PD_p_color"](r, g, b, a * 255);
	};
	NativeContext.prototype.setFillStyle = function (r, g, b, a) {
		this.ctx["PD_b_color1"](r, g, b, a * 255);
	};

	Object.defineProperty(NativeContext.prototype, "lineWidth", {
		set: function (value) {
			this.ctx["PD_p_width"](value);
		}
	});

	NativeContext.prototype.clearRect = function (x, y, w, h) {};
	NativeContext.prototype.getImageData = function (sx,sy,sw,sh) {};
	NativeContext.prototype.putImageData = function (image_data,dx,dy,dirtyX,dirtyY,dirtyWidth,dirtyHeight) {};
	
	// В текущей реализации используется несколько разных DrawingContext, но ссылающихся на одни и те же
	// FontManager, чтобы разрулить правильное выставление шрифта используем здесь локальные переменные
	let setupFontSize  = -1;
	let setupFontName  = "";
	let setupFontStyle = -1;
	let setupRotated   = false;
	let setupPpiX      = -1;
	let setupPpiY      = -1;
	
	function resetDrawingContextFonts() {
		setupFontSize  = -1;
		setupFontName  = "";
		setupFontStyle = -1;
		setupRotated   = false;
		setupPpiX      = -1;
		setupPpiY      = -1;
	}
	
	/**
	 * Emulates scalable canvas context
	 * -----------------------------------------------------------------------------
	 * @constructor
	 * @param {Object} settings  Settings : {
	 *   canvas : HTMLElement
	 *   units  : units (0=px, 1=pt, 2=in, 3=mm)
	 *   font   : AscCommonExcel.Font
	 * }
	 *
	 * @memberOf Asc
	 */
	function DrawingContext(settings) {
		this.canvas = null;
		this.ctx = null;

		this.setCanvas(settings.canvas);

		this.textRotated = false;
		this.ppiX = 96;
		this.ppiY = 96;
		this.scaleFactor = 1;
		this._ppiInit();

		this.LastFontOriginInfo = undefined;

		this._mct = new Matrix();  // units transform
		this._mt = new Matrix();  // user transform
		this._mbt = new Matrix();  // bound transform
		this._mft = new Matrix();  // full transform
		this._mift = new Matrix();  // inverted full transform
		this._im = new Matrix();

		this.units = 3/*mm*/;
		this.changeUnits(undefined !== settings.units ? settings.units : this.units);

		this.fmgrGraphics = undefined !== settings.fmgrGraphics ? settings.fmgrGraphics : null;

		if (null === this.fmgrGraphics) {
			throw "Can not set graphics in DrawingContext";
		}

		/** @type AscCommonExcel.Font */
		this.font = undefined !== settings.font ? settings.font : null;
		// Font должен быть передан (он общий для всех DrawingContext, т.к. может возникнуть ситуация как в баге http://bugzilla.onlyoffice.com/show_bug.cgi?id=19784)
		if (null === this.font) {
			throw "Can not set font in DrawingContext";
		}

		// AscCommon.CColor
		this.fillColor = new AscCommon.CColor(255, 255, 255);
		return this;
	}

	DrawingContext.prototype._ppiInit = function () {
		this.scaleFactor = 1;

		if (window["IS_NATIVE_EDITOR"]) {
			this.ppiX = this.ppiY = window["native"]["GetDeviceDPI"]();
		} else {
            this.ppiX = AscCommon.AscBrowser.convertToRetinaValue(96, true);
            this.ppiY = AscCommon.AscBrowser.convertToRetinaValue(96, true);
		}
	};
	
	DrawingContext.prototype.toDataURL = function (type) {
		type = type || 'image/png';
		var canvas = this.getCanvas();
		return canvas.toDataURL(type);
	};

	/**
	 * Returns width of drawing context in current units
	 * @param {Number} [units]  Единицы измерения (0=px, 1=pt, 2=in, 3=mm) в которых будет возвращена ширина
	 * @return {Number}
	 */
	DrawingContext.prototype.getWidth = function (units) {
		var i = units >= 0 && units <= 3 ? units : this.units;
		return this.canvas.width * getCvtRatio(0/*px*/, i, this.ppiX);
	};

	/**
	 * Returns height of drawing context in current units
	 * @param {Number} [units]  Единицы измерения (0=px, 1=pt, 2=in, 3=mm) в которых будет возвращена высота
	 * @return {Number}
	 */
	DrawingContext.prototype.getHeight = function (units) {
		var i = units >= 0 && units <= 3 ? units : this.units;
		return this.canvas.height * getCvtRatio(0/*px*/, i, this.ppiY);
	};

	/**
	 * Returns canvas element
	 * @type {Element}
	 */
	DrawingContext.prototype.getCanvas = function () {
		return this.canvas;
	};

	/**
	 *
	 * @param canvas
	 */
	DrawingContext.prototype.setCanvas = function (canvas) {
		this.canvas = canvas || null;
		this.ctx = window["IS_NATIVE_EDITOR"] ? new NativeContext() : (this.canvas && AscCommon.AscBrowser.getContext2D(this.canvas));
	};

	/**
	 * Returns pixels per inch ratio
	 * @type {Number}
	 */
	DrawingContext.prototype.getPPIX = function () {
		return this.ppiX;
	};

	/**
	 * Returns pixels per inch ratio
	 * @type {Number}
	 */
	DrawingContext.prototype.getPPIY = function () {
		return this.ppiY;
	};

	/**
	 * Returns currrent units (0=px, 1=pt, 2=in, 3=mm)
	 * @type {Number}
	 */
	DrawingContext.prototype.getUnits = function () {
		return this.units;
	};

	DrawingContext.prototype.moveImageDataSafari = function (sx, sy, w, h, x, y) {
		var sr = this._calcRect(sx, sy, w, h);
		var r = this._calcRect(x, y);
		var imgData = this.ctx.getImageData(sr.x, sr.y, sr.w, sr.h);

		var minX, maxX, minY, maxY;
		if (sx < x) {
			minX = sr.x;
			maxX = r.x;
		} else {
			minX = r.x;
			maxX = sr.x;
		}
		if (sy < y) {
			minY = sr.y;
			maxY = r.y;
		} else {
			minY = r.y;
			maxY = sr.y;
		}
		this.ctx.clearRect(minX, minY, maxX + sr.w, maxY + sr.h);
		this.ctx.putImageData(imgData, r.x, r.y);
		return this;
	};
	DrawingContext.prototype.moveImageData = function (sx, sy, w, h, x, y) {
		var sr = this._calcRect(sx, sy, w, h);
		var r = this._calcRect(x, y);

		this.ctx.save();
		this.ctx.globalCompositeOperation = 'copy';
		this.ctx.beginPath();
		this.ctx.rect(r.x, r.y, sr.w, sr.h);
		this.ctx.clip();

		this.ctx.drawImage(this.getCanvas(), sr.x, sr.y, sr.w, sr.h, r.x, r.y, sr.w, sr.h);

		this.ctx.restore();
		this.ctx.beginPath();

		return this;
	};

	/**
	 * Changes units of drawing context
	 * @param {Number} units  New units of drawing context (0=px, 1=pt, 2=in, 3=mm)
	 */
	DrawingContext.prototype.changeUnits = function (units) {
		var i = units >= 0 && units <= 3 ? units : 0;
		this._mct.sx = getCvtRatio(i, 0/*px*/, this.ppiX);
		this._mct.sy = getCvtRatio(i, 0/*px*/, this.ppiY);
		this._calcMFT();
		this.units = units;
		return this;
	};

	/**
	 * Returns currrent zoom ratio
	 * @type {Number}
	 */
	DrawingContext.prototype.getZoom = function () {
		return this.scaleFactor;
	};

	/**
	 * Changes scale factor of drawing context by changing its PPI
	 * @param {Number} factor
	 */
	DrawingContext.prototype.changeZoom = function (factor) {
		if (!factor) {
			factor = this.scaleFactor;
			this._ppiInit();
		}

		factor = asc_round(factor * 1000) / 1000;

		this.ppiX = asc_round(this.ppiX / this.scaleFactor * factor * 1000) / 1000;
		this.ppiY = asc_round(this.ppiY / this.scaleFactor * factor * 1000) / 1000;
		this.scaleFactor = factor;

		// reinitialize
		this.changeUnits(this.units);
		this.setFont(this.font);

		return this;
	};

	/**
	 * Resets dimensions of drawing context (canvas 'width' and 'height' attributes)
	 * @param {Number} width   New width in current units
	 * @param {Number} height  New height in current units
	 */
	DrawingContext.prototype.resetSize = function (width, height) {
		var w = asc_round(width * getCvtRatio(this.units, 0/*px*/, this.ppiX)), h = asc_round(
			height * getCvtRatio(this.units, 0/*px*/, this.ppiY));
		if (w !== this.canvas.width) {
			this.canvas.width = w;
		}
		if (h !== this.canvas.height) {
			this.canvas.height = h;
		}
		return this;
	};

	/**
	 * Expands dimensions of drawing context (canvas 'width' and 'height' attributes)
	 * @param {Number} width   New width in current units
	 * @param {Number} height  New height in current units
	 */
	DrawingContext.prototype.expand = function (width, height) {
		var w = asc_round(width * getCvtRatio(this.units, 0/*px*/, this.ppiX)), h = asc_round(
			height * getCvtRatio(this.units, 0/*px*/, this.ppiY));
		if (w > this.canvas.width) {
			this.canvas.width = w;
		}
		if (h > this.canvas.height) {
			this.canvas.height = h;
		}
		return this;
	};

	// Canvas methods

	DrawingContext.prototype.clear = function () {
		this.clearRect(0, 0, this.getWidth(), this.getHeight());
		return this;
	};

	DrawingContext.prototype.AddClipRect = function (x, y, w, h) {
		return this.save().beginPath().rect(x, y, w, h).clip();
	};

	DrawingContext.prototype.RemoveClipRect = function () {
		return this.restore();
	};

	DrawingContext.prototype.save = function () {
		this.ctx.save();
		return this;
	};

	DrawingContext.prototype.restore = function () {
		this.ctx.restore();
		return this;
	};

	DrawingContext.prototype.scale = function (kx, ky) {
		//TODO: implement scale()
		return this;
	};

	DrawingContext.prototype.rotate = function (a) {
		//TODO: implement rotate()
		return this;
	};

	DrawingContext.prototype.translate = function (dx, dy) {
		//TODO: implement translate()
		return this;
	};

	DrawingContext.prototype.transform = function (sx, shy, shx, sy, tx, ty) {
		//TODO: implement transform()
		return this;
	};

	DrawingContext.prototype.setTransform = function (sx, shy, shx, sy, tx, ty) {
		this._mbt.assign(sx, shx, shy, sy, tx, ty);
		return this;
	};

	DrawingContext.prototype.setTextTransform = function (sx, shy, shx, sy, tx, ty) {
		this._mt.assign(sx, shx, shy, sy, tx, ty);
		return this;
	};

	DrawingContext.prototype.updateTransforms = function () {
		this._calcMFT();
		this.fmgrGraphics[1].SetTextMatrix(this._mt.sx, this._mt.shy, this._mt.shx, this._mt.sy, this._mt.tx,
			this._mt.ty);
	};

	DrawingContext.prototype.resetTransforms = function () {
		this.setTransform(this._im.sx, this._im.shy, this._im.shx, this._im.sy, this._im.tx, this._im.ty);
		this.setTextTransform(this._im.sx, this._im.shy, this._im.shx, this._im.sy, this._im.tx, this._im.ty);
		this._calcMFT();

      	if (window["IS_NATIVE_EDITOR"]) {
			window["native"]["PD_transform"](this._im.sx, this._im.shy, this._im.shx, this._im.sy, this._im.tx, this._im.ty);
      	}
	};

	// Style methods

	DrawingContext.prototype.getFillStyle = function () {
		return this.ctx.fillStyle;
	};

	DrawingContext.prototype.getStrokeStyle = function () {
		return this.ctx.strokeStyle;
	};

	DrawingContext.prototype.getLineWidth = function () {
		return this.ctx.lineWidth;
	};

	DrawingContext.prototype.getLineCap = function () {
		return this.ctx.lineCap;
	};

	DrawingContext.prototype.getLineJoin = function () {
		return this.ctx.lineJoin;
	};

	/**
	 * @param {AscCommonExcel.RgbColor || AscCommonExcel.ThemeColor || AscCommon.CColor} val
	 * @returns {DrawingContext}
	 */
	DrawingContext.prototype.setFillStyle = function (val) {
		var _r = val.getR();
		var _g = val.getG();
		var _b = val.getB();
		var _a = val.getA();
		this.fillColor = new AscCommon.CColor(_r, _g, _b, _a);
		if (this.ctx.fillStyle) {
			this.ctx.fillStyle = "rgba(" + _r + "," + _g + "," + _b + "," + _a + ")";
		} else {
			this.ctx.setFillStyle(_r, _g, _b, _a);
		}
		return this;
	};

	DrawingContext.prototype.setFillPattern = function (val) {
		this.ctx.fillStyle = val;
		return this;
	};

	/**
	 * @param {AscCommonExcel.RgbColor || AscCommonExcel.ThemeColor || AscCommon.CColor} val
	 * @returns {DrawingContext}
	 */
	DrawingContext.prototype.setStrokeStyle = function (val) {
		var _r = val.getR();
		var _g = val.getG();
		var _b = val.getB();
		var _a = val.getA();
		if (this.ctx.strokeStyle) {
			this.ctx.strokeStyle = "rgba(" + _r + "," + _g + "," + _b + "," + _a + ")";
		} else {
			this.ctx.setStrokeStyle(_r, _g, _b, _a);
		}
		return this;
	};

	DrawingContext.prototype.setLineWidth = function (width) {
		this.ctx.lineWidth = width;
		return this;
	};

	DrawingContext.prototype.setLineCap = function (cap) {
		this.ctx.lineCap = cap;
		return this;
	};

	DrawingContext.prototype.setLineJoin = function (join) {
		this.ctx.lineJoin = join;
		return this;
	};

	DrawingContext.prototype.setLineDash = function (segments) {
		if (this.ctx.setLineDash) {
			this.ctx.setLineDash(segments);
		}
		return this;
	};

	DrawingContext.prototype.fillRect = function (x, y, w, h) {
		var r = this._calcRect(x, y, w, h);
		this.ctx.fillRect(r.x, r.y, r.w, r.h);
		return this;
	};

	DrawingContext.prototype.strokeRect = function (x, y, w, h) {
		var isEven = 0 !== this.ctx.lineWidth % 2 ? 0.5 : 0;
		var r = this._calcRect(x, y, w, h);
		this.ctx.strokeRect(r.x + isEven, r.y + isEven, r.w, r.h);
		return this;
	};

	DrawingContext.prototype.clearRect = function (x, y, w, h) {
		var r = this._calcRect(x, y, w, h);
		this.ctx.clearRect(r.x, r.y, r.w, r.h);
		return this;
	};

	DrawingContext.prototype.clearRectByX = function (x, y, w, h) {
		var r = this._calcRect(x, y, w, h);
		this.ctx.clearRect(r.x - 1, r.y, r.w + 1, r.h);
	};
	DrawingContext.prototype.clearRectByY = function (x, y, w, h) {
		var r = this._calcRect(x, y, w, h);
		this.ctx.clearRect(r.x, r.y - 1, r.w, r.h + 1);
	};

	// Font and text methods

	DrawingContext.prototype.getFont = function () {
		return this.font.clone();
	};

	DrawingContext.prototype.getFontSize = function () {
		return this.font.getSize();
	};

	/**
	 * @param {Number} [units]  Units of result (0=px, 1=pt, 2=in, 3=mm)
	 * @return {FontMetrics}
	 */
	DrawingContext.prototype.getFontMetrics = function (units) {
		var fm = this.fmgrGraphics[3];
		var d = Math.abs(fm.m_lDescender);
		var ppiX = AscCommon.AscBrowser.convertToRetinaValue(96, true);

		var r = getCvtRatio(0/*px*/, units >= 0 && units <= 3 ? units : this.units, ppiX);
		var r2 = getCvtRatio(1/*pt*/, units >= 0 && units <= 3 ? units : this.units, ppiX);
		var factor = this.getFontSize() * r / fm.m_lUnits_Per_Em;

		var res = new FontMetrics();
		res.ascender = factor * fm.m_lAscender;
		res.descender = factor * d;
		res.lineGap = factor * (fm.m_lLineHeight - fm.m_lAscender - d);

		var faceMetrics = fm.m_pFont.cellGetMetrics();
		res.nat_scale = faceMetrics[0];
		res.nat_y1 = faceMetrics[1];
		res.nat_y2 = faceMetrics[2];

		res.nat_y1 *= r2;
		res.nat_y2 *= r2;
		return res;
	};

	DrawingContext.prototype.nativeTextDecorationTransform = function(isStart)
	{
		// текст рисуется с трансформом, а strikeout/underline - без (матрица применяется ДО отрисовщика)
		if (isStart)
			window["native"]["PD_transform"](this._im.sx, this._im.shy, this._im.shx, this._im.sy, this._im.tx, this._im.ty);
		else
			window["native"]["PD_transform"](this._mt.sx, this._mt.shy, this._mt.shx, this._mt.sy, this._mt.tx, this._mt.ty);
	};

	/**
	 *
	 * @param font
	 * @param [angle]
	 * @returns {DrawingContext}
	 */
	DrawingContext.prototype.setFont = function (font, angle) {

		this.font.assign(font);

		var italic = this.font.getItalic();
		var bold = this.font.getBold();
		var fontStyle;
		if (italic && bold) {
			fontStyle = FontStyle.FontStyleBoldItalic;
		} else if (italic) {
			fontStyle = FontStyle.FontStyleItalic;
		} else if (bold) {
			fontStyle = FontStyle.FontStyleBold;
		} else {
			fontStyle = FontStyle.FontStyleRegular;
		}
		
		this.setTextRotated(!!angle);
		this._setFont(this.font.getName(), this.font.getSize(), fontStyle);
		return this;
	};
	
	
	DrawingContext.prototype._setFont = function(fontName, fontSize, fontStyle) {
		let isRotated = this.textRotated;
		
		if (setupFontName === fontName
			&& setupFontSize === fontSize
			&& setupFontStyle === fontStyle
			&& setupPpiX === this.ppiX
			&& setupPpiY === this.ppiY
			&& setupRotated === isRotated) {
			if (!window["IS_NATIVE_EDITOR"]) {
				// disable this optimization (see m_isPassCommands (core-ext))
				return;
			}
		}
		
		setupFontSize  = fontSize;
		setupFontName  = fontName;
		setupFontStyle = fontStyle;
		setupRotated   = isRotated;
		setupPpiX      = this.ppiX;
		setupPpiY      = this.ppiY;
		
		this.font.setName(fontName);
		this.font.setSize(fontSize);
		this.font.setBold(fontStyle & FontStyle.FontStyleBold);
		this.font.setItalic(fontStyle & FontStyle.FontStyleItalic);
		
		if (window["IS_NATIVE_EDITOR"]) {
			var fontInfo = AscFonts.g_fontApplication.GetFontInfo(fontName, fontStyle, this.LastFontOriginInfo);
			fontInfo = AscCommon.GetLoadInfoForMeasurer(fontInfo, fontStyle);
			
			var flag = 0;
			if (fontInfo.NeedBold) {
				flag |= 0x01;
			}
			if (fontInfo.NeedItalic) {
				flag |= 0x02;
			}
			if (fontInfo.SrcBold) {
				flag |= 0x04;
			}
			if (fontInfo.SrcItalic) {
				flag |= 0x08;
			}
			
			// выставляем шрифт и отрисовщику...
			var drawFontSize = fontSize * this.scaleFactor * 96.0 / 25.4;
			window["native"]["PD_LoadFont"](fontInfo.Path, fontInfo.FaceIndex, drawFontSize, flag);
			
			// на отрисовке ячейки трансформ выставляется/сбрасывается. так что тут - только если есть angle
			if (isRotated)
				window["native"]["PD_transform"](this._mt.sx, this._mt.shy, this._mt.shx, this._mt.sy, this._mt.tx, this._mt.ty);
			
			// ...и измерятелю
			AscFonts.g_fontApplication.LoadFont(fontName, AscCommon.g_font_loader, this.fmgrGraphics[3], fontSize, fontStyle, this.ppiX, this.ppiY);
		} else {
			let r;
			if (isRotated) {
				r = AscFonts.g_fontApplication.LoadFont(fontName, AscCommon.g_font_loader, this.fmgrGraphics[1], fontSize, fontStyle, this.ppiX, this.ppiY);
			} else {
				r = AscFonts.g_fontApplication.LoadFont(fontName, AscCommon.g_font_loader, this.fmgrGraphics[0], fontSize, fontStyle, this.ppiX, this.ppiY);
				AscFonts.g_fontApplication.LoadFont(fontName, AscCommon.g_font_loader, this.fmgrGraphics[3], fontSize, fontStyle, this.ppiX, this.ppiY);
			}
			
			if (isRotated) {
				this.fmgrGraphics[1].SetTextMatrix(this._mt.sx, this._mt.shy, this._mt.shx, this._mt.sy, this._mt.tx, this._mt.ty);
			}
			
			if (r === false) {
				throw "Can not use " + fontName + " font. (Check whether font file is loaded)";
			}
		}
		
	};
	
	DrawingContext.prototype.SetFontInternal = function(name, size, style) {
		this._setFont(name, size, style);
	};
	
	DrawingContext.prototype.setTextRotated = function(isRotated) {
		this.textRotated = isRotated;
	};

	/**
	 * Returns dimensions of first char of string
	 * @param {String} text   Character to measure
	 * @param {Number} units  Units (0 = px, 1 = pt, 2 = in, 3 = mm)
	 * @return {TextMetrics}  Returns the char dimension
	 */
	DrawingContext.prototype.measureChar = function (text, units, code) {
		return this.measureText(text ? text.charAt(0) : null, units, [code]);
	};

	/**
	 * Returns dimensions of string
	 * @param {String} text   String to measure
	 * @param {Number} units  Units (0 = px, 1 = pt, 2 = in, 3 = mm)
	 * @return {TextMetrics}  Returns the dimension of string {width: w, height: h}
	 */
	DrawingContext.prototype.measureText = function (text, units, aCodes) {
		var code;
		var fm = this.fmgrGraphics[3];
		var r = getCvtRatio(0/*px*/, units >= 0 && units <= 3 ? units : this.units, this.ppiX);
		var textLength = aCodes ? aCodes.length : text.length;
		for (var tmp, w = 0, w2 = 0, i = 0; i < textLength; ++i) {
			code = aCodes ? aCodes[i] : text.charCodeAt(i);
			// Replace Non-breaking space(0xA0) with White-space(0x20)
			tmp = fm.MeasureChar(0xA0 === code ? 0x20 : code);
			w += asc_round(tmp.fAdvanceX); // ToDo скачет при wrap в ячейке и zoom
		}
		w2 = w - tmp.fAdvanceX + tmp.oBBox.fMaxX - tmp.oBBox.fMinX + 1;
		return this._calcTextMetrics(w * r, w2 * r, fm, r);
	};

	DrawingContext.prototype.fillGlyph = function (pGlyph, fmgr) {
		var nW = pGlyph.oBitmap.nWidth;
		var nH = pGlyph.oBitmap.nHeight;

		if (!(nW > 0 && nH > 0)) {
			return;
		}

		var nX = asc_floor(fmgr.m_oGlyphString.m_fX + pGlyph.fX + pGlyph.oBitmap.nX);
		var nY = asc_floor(fmgr.m_oGlyphString.m_fY + pGlyph.fY - pGlyph.oBitmap.nY);

		var _r = this.fillColor.r;
		var _g = this.fillColor.g;
		var _b = this.fillColor.b;

		pGlyph.oBitmap.oGlyphData.checkColor(_r, _g, _b, nW, nH);
		pGlyph.oBitmap.draw(this.ctx, nX, nY);
	};

	DrawingContext.prototype.fillText = function (text, x, y, maxWidth, charWidths, angle) {
		var code, pGlyph;
		var manager = angle ? this.fmgrGraphics[1] : this.fmgrGraphics[0];

		var _x = this._mift.transformPointX(x, y);
		var _y = this._mift.transformPointY(x, y);

		var length = text.length;
		for (var i = 0; i < length; ++i) {
			code = text.charCodeAt ? text.charCodeAt(i) : text[i];
			// Replace Non-breaking space(0xA0) with White-space(0x20)
			code = 0xA0 === code ? 0x20 : code;
			if (window["IS_NATIVE_EDITOR"]) {
				window["native"]["PD_FillText"](_x, _y, code);
				// убрать это!!! все сдвиги ДОЛЖНЫ быть вщять из измерятеля/шейпера
				_x += asc_round((this.measureChar(undefined, 3, code).width) * this.scaleFactor * 96.0 / 25.4);
			} else {
				_x = asc_round(manager.LoadString4C(code, _x, _y));
				pGlyph = manager.m_oGlyphString.m_pGlyphsBuffer[0];
				if (null === pGlyph || null === pGlyph.oBitmap) {
					continue;
				}

				this.fillGlyph(pGlyph, manager);
			}
		}

		return this;
	};

	DrawingContext.prototype.fillTextCode = function (text, x, y, maxWidth, charWidths, angle) {
		return this.fillText(text, x, y, maxWidth, charWidths, angle);
	};
	
	DrawingContext.prototype.tg = function(gid, x, y, codePoints) {
		
		var _x = this._mift.transformPointX(x, y);
		var _y = this._mift.transformPointY(x, y);
		
		if (window["IS_NATIVE_EDITOR"]) {
			window["native"]["PD_FillTextG"](_x, _y, gid);
		} else {
			let fontManager = this.textRotated ? this.fmgrGraphics[1] : this.fmgrGraphics[0];
			try {
				fontManager.LoadString3C(gid, _x, _y, codePoints);
			}
			catch(err){}
			
			let glyph = fontManager.m_oGlyphString.m_pGlyphsBuffer[0];
			if (!glyph || !glyph.oBitmap)
				return this;
			
			this.fillGlyph(glyph, fontManager);
		}
		return this;
	};

	// Path methods

	DrawingContext.prototype.beginPath = function () {
		this.ctx.beginPath();
		return this;
	};

	DrawingContext.prototype.closePath = function () {
		this.ctx.closePath();
		return this;
	};

	DrawingContext.prototype.moveTo = function (x, y) {
		var r = this._calcRect(x, y);
		this.ctx.moveTo(r.x, r.y);
		return this;
	};

	DrawingContext.prototype.lineTo = function (x, y) {
		var r = this._calcRect(x, y);
		this.ctx.lineTo(r.x, r.y);
		return this;
	};

	DrawingContext.prototype.lineDiag = function (x1, y1, x2, y2) {
		var isEven = 0 !== this.ctx.lineWidth % 2 ? 0.5 : 0;
		var r1 = this._calcRect(x1, y1);
		var r2 = this._calcRect(x2, y2);
		this.ctx.moveTo(r1.x + isEven, r1.y + isEven);
		this.ctx.lineTo(r2.x + isEven, r2.y + isEven);
		return this;
	};
	DrawingContext.prototype.lineHor = function (x1, y, x2) {
		var isEven = 0 !== this.ctx.lineWidth % 2 ? 0.5 : 0;
		var r1 = this._calcRect(x1, y);
		var r2 = this._calcRect(x2, y);
		this.ctx.moveTo(r1.x, r1.y + isEven);
		this.ctx.lineTo(r2.x, r2.y + isEven);
		return this;
	};
	DrawingContext.prototype.lineVer = function (x, y1, y2) {
		var isEven = 0 !== this.ctx.lineWidth % 2 ? 0.5 : 0;
		var r1 = this._calcRect(x, y1);
		var r2 = this._calcRect(x, y2);
		this.ctx.moveTo(r1.x + isEven, r1.y);
		this.ctx.lineTo(r2.x + isEven, r2.y);
		return this;
	};

	// Отрисовка на 1px меньше
	DrawingContext.prototype.lineHorPrevPx = function (x1, y, x2) {
		var isEven = (0 !== this.ctx.lineWidth % 2 ? 0.5 : 0) - 1;
		var r1 = this._calcRect(x1, y);
		var r2 = this._calcRect(x2, y);
		this.ctx.moveTo(r1.x, r1.y + isEven);
		this.ctx.lineTo(r2.x, r2.y + isEven);
		return this;
	};
	DrawingContext.prototype.lineVerPrevPx = function (x, y1, y2) {
		var isEven = (0 !== this.ctx.lineWidth % 2 ? 0.5 : 0) - 1;
		var r1 = this._calcRect(x, y1);
		var r2 = this._calcRect(x, y2);
		this.ctx.moveTo(r1.x + isEven, r1.y);
		this.ctx.lineTo(r2.x + isEven, r2.y);
		return this;
	};

	DrawingContext.prototype.dashLineCleverHor = function (x1, y, x2) {
		var isEven = 0 !== this.ctx.lineWidth % 2 ? 0.5 : 0;
		var w_dot = AscCommonExcel.c_oAscCoAuthoringDottedWidth, w_dist = AscCommonExcel.c_oAscCoAuthoringDottedDistance;
		var _x1 = this._mct.transformPointX(x1, y);
		var _y = this._mct.transformPointY(x1, y) - 1;
		var _x2 = this._mct.transformPointX(x2, y);
		var ctx = this.ctx;

		_x1 = (_x1 >> 0);
		_y = (_y >> 0) + isEven;
		_x2 = (_x2 >> 0);

		for (; _x1 < _x2; _x1 += w_dist) {
			ctx.moveTo(_x1, _y);
			_x1 += w_dot;

			if (_x1 > _x2) {
				_x1 = _x2;
			}

			ctx.lineTo(_x1, _y);
		}
	};
	DrawingContext.prototype.dashLineCleverVer = function (x, y1, y2) {
		var isEven = 0 !== this.ctx.lineWidth % 2 ? 0.5 : 0;
		var w_dot = AscCommonExcel.c_oAscCoAuthoringDottedWidth, w_dist = AscCommonExcel.c_oAscCoAuthoringDottedDistance;
		var _y1 = this._mct.transformPointY(x, y1);
		var _x = this._mct.transformPointX(x, y1) - 1;
		var _y2 = this._mct.transformPointY(x, y2);
		var ctx = this.ctx;

		_y1 = (_y1 >> 0);
		_x = (_x >> 0) + isEven;
		_y2 = (_y2 >> 0);

		for (; _y1 < _y2; _y1 += w_dist) {
			ctx.moveTo(_x, _y1);
			_y1 += w_dot;

			if (_y1 > _y2) {
				_y1 = _y2;
			}

			ctx.lineTo(_x, _y1);
		}
	};

	DrawingContext.prototype.dashLine = function (x1, y1, x2, y2, w_dot, w_dist) {
		var len = Math.sqrt((x2 - x1) * (x2 - x1) + (y2 - y1) * (y2 - y1));
		if (len < 1) {
			len = 1;
		}

		var len_x1 = Math.abs(w_dot * (x2 - x1) / len);
		var len_y1 = Math.abs(w_dot * (y2 - y1) / len);
		var len_x2 = Math.abs(w_dist * (x2 - x1) / len);
		var len_y2 = Math.abs(w_dist * (y2 - y1) / len);
		var i, j;

		if (x1 <= x2 && y1 <= y2) {
			for (i = x1, j = y1; i < x2 || j < y2; i += len_x2, j += len_y2) {
				this.moveTo(i, j);

				i += len_x1;
				j += len_y1;

				if (i > x2) {
					i = x2;
				}
				if (j > y2) {
					j = y2;
				}

				this.lineTo(i, j);
			}
		} else if (x1 <= x2 && y1 > y2) {
			for (i = x1, j = y1; i < x2 || j > y2; i += len_x2, j -= len_y2) {
				this.moveTo(i, j);

				i += len_x1;
				j -= len_y1;

				if (i > x2) {
					i = x2;
				}
				if (j < y2) {
					j = y2;
				}

				this.lineTo(i, j);
			}
		} else if (x1 > x2 && y1 <= y2) {
			for (i = x1, j = y1; i > x2 || j < y2; i -= len_x2, j += len_y2) {
				this.moveTo(i, j);

				i -= len_x1;
				j += len_y1;

				if (i < x2) {
					i = x2;
				}
				if (j > y2) {
					j = y2;
				}

				this.lineTo(i, j);
			}
		} else {
			for (i = x1, j = y1; i > x2 || j > y2; i -= len_x2, j -= len_y2) {
				this.moveTo(i, j);

				i -= len_x1;
				j -= len_y1;

				if (i < x2) {
					i = x2;
				}
				if (j < y2) {
					j = y2;
				}

				this.lineTo(i, j);
			}
		}
	};

	DrawingContext.prototype.dashRect = function (x1, y1, x2, y2, x3, y3, x4, y4, w_dot, w_dist) {
		this.dashLine(x1, y1, x2, y2, w_dot, w_dist);
		this.dashLine(x2, y2, x4, y4, w_dot, w_dist);
		this.dashLine(x4, y4, x3, y3, w_dot, w_dist);
		this.dashLine(x3, y3, x1, y1, w_dot, w_dist);
	};

	DrawingContext.prototype.rect = function (x, y, w, h) {
		var r = this._calcRect(x, y, w, h);
		this.ctx.rect(r.x, r.y, r.w, r.h);
		return this;
	};

	DrawingContext.prototype.arc = function (x, y, radius, startAngle, endAngle, antiClockwise, dx, dy) {
		var r = this._calcRect(x, y);
		dx = typeof dx !== "undefined" ? dx : 0;
		dy = typeof dy !== "undefined" ? dy : 0;
		this.ctx.arc(r.x + dx, r.y + dy, radius, startAngle, endAngle, antiClockwise);
		return this;
	};

	DrawingContext.prototype.bezierCurveTo = function (x1, y1, x2, y2, x3, y3) {
		var p1 = this._calcRect(x1, y1), p2 = this._calcRect(x2, y2), p3 = this._calcRect(x3, y3);
		this.ctx.bezierCurveTo(p1.x, p1.y, p2.x, p2.y, p3.x, p3.y);
		return this;
	};

	DrawingContext.prototype.fill = function () {
		this.ctx.fill();
		return this;
	};

	DrawingContext.prototype.stroke = function () {
		this.ctx.stroke();
		return this;
	};

	DrawingContext.prototype.clip = function () {
		this.ctx.clip();
		return this;
	};

	// Image methods
	DrawingContext.prototype.drawImage = function (img, sx, sy, sw, sh, dx, dy, dw, dh) {
		var sr = this._calcRect(sx, sy, sw, sh), dr = this._calcRect(dx, dy, dw, dh);
		this.ctx.drawImage(img, sr.x, sr.y, sr.w, sr.h, dr.x, dr.y, dr.w, dr.h);
		return this;
	};

	// Private methods
	DrawingContext.prototype._calcRect = function (x, y, w, h) {
		var wh = w !== undefined && h !== undefined, x2 = x + w, y2 = y + h, _x = this._mft.transformPointX(x,
			y), _y = this._mft.transformPointY(x, y);
		return {
			x: asc_round(_x),
			y: asc_round(_y),
			w: wh ? asc_round(this._mft.transformPointX(x2, y2) - _x) : undefined,
			h: wh ? asc_round(this._mft.transformPointY(x2, y2) - _y) : undefined
		};
	};

	DrawingContext.prototype._calcMFT = function () {
		this._mft = this._mct.clone();
		this._mft.multiply(this._mbt, MATRIX_ORDER_PREPEND);
		this._mft.multiply(this._mt, MATRIX_ORDER_PREPEND);

		this._mift = this._mt.clone();
		this._mift.invert();
		this._mift.multiply(this._mft, MATRIX_ORDER_PREPEND);
	};

	/**
	 * @param {Number} w         Ширина текста
	 * @param {Number} wBB       Ширина Bound Box текста
	 * @param {AscFonts.CFontManager} fm  Объект AscFonts.CFontManager для получения метрик шрифта
	 * @param {Number} r         Коэффициент перевода pt -> в текущие единицы измерения (this.units)
	 * @return {TextMetrics}
	 */
	DrawingContext.prototype._calcTextMetrics = function (w, wBB, fm, r) {
		var factor = this.getFontSize() * r / fm.m_lUnits_Per_Em, l = fm.m_lLineHeight * factor, b = fm.m_lAscender *
			factor, d = Math.abs(fm.m_lDescender * factor);
		return new TextMetrics(w, b + d, l, b, d, this.font.getSize(), wBB);
	};


	/*
	 * Export
	 * -----------------------------------------------------------------------------
	 */

	window['Asc'] = window['Asc'] || {};
	window["Asc"].getCvtRatio = getCvtRatio;
	window["Asc"].colorObjToAscColor = colorObjToAscColor;

	window["Asc"].TextMetrics = TextMetrics;
	window["Asc"].FontMetrics = FontMetrics;
	window["Asc"].DrawingContext = DrawingContext;
	window["Asc"].Matrix = Matrix;
	
	window['AscCommonExcel'] = window['AscCommonExcel'] || {};
	window["AscCommonExcel"].resetDrawingContextFonts = resetDrawingContextFonts;
	
})(window);