Subversion Repositories Applications.papyrus

/*

	Copyright (c) 2004-2006, The Dojo Foundation

	All Rights Reserved.

	Licensed under the Academic Free License version 2.1 or above OR the

	modified BSD license. For more information on Dojo licensing, see:

		http://dojotoolkit.org/community/licensing.shtml

*/

dojo.provide("dojo.gfx.path");

dojo.require("dojo.math");

dojo.require("dojo.gfx.shape");

dojo.declare("dojo.gfx.path.Path", dojo.gfx.Shape, {initializer:function (rawNode) {

	this.shape = dojo.lang.shallowCopy(dojo.gfx.defaultPath, true);

	this.segments = [];

	this.absolute = true;

	this.last = {};

	this.attach(rawNode);

}, setAbsoluteMode:function (mode) {

	this.absolute = typeof (mode) == "string" ? (mode == "absolute") : mode;

	return this;

}, getAbsoluteMode:function () {

	return this.absolute;

}, getBoundingBox:function () {

	return "l" in this.bbox ? {x:this.bbox.l, y:this.bbox.t, width:this.bbox.r - this.bbox.l, height:this.bbox.b - this.bbox.t} : null;

}, getLastPosition:function () {

	return "x" in this.last ? this.last : null;

}, _updateBBox:function (x, y) {

	if ("l" in this.bbox) {

		if (this.bbox.l > x) {

			this.bbox.l = x;

		}

		if (this.bbox.r < x) {

			this.bbox.r = x;

		}

		if (this.bbox.t > y) {

			this.bbox.t = y;

		}

		if (this.bbox.b < y) {

			this.bbox.b = y;

		}

	} else {

		this.bbox = {l:x, b:y, r:x, t:y};

	}

}, _updateWithSegment:function (segment) {

	var n = segment.args;

	var l = n.length;

	switch (segment.action) {

	  case "M":

	  case "L":

	  case "C":

	  case "S":

	  case "Q":

	  case "T":

		for (var i = 0; i < l; i += 2) {

			this._updateBBox(this.bbox, n[i], n[i + 1]);

		}

		this.last.x = n[l - 2];

		this.last.y = n[l - 1];

		this.absolute = true;

		break;

	  case "H":

		for (var i = 0; i < l; ++i) {

			this._updateBBox(this.bbox, n[i], this.last.y);

		}

		this.last.x = n[l - 1];

		this.absolute = true;

		break;

	  case "V":

		for (var i = 0; i < l; ++i) {

			this._updateBBox(this.bbox, this.last.x, n[i]);

		}

		this.last.y = n[l - 1];

		this.absolute = true;

		break;

	  case "m":

		var start = 0;

		if (!("x" in this.last)) {

			this._updateBBox(this.bbox, this.last.x = n[0], this.last.y = n[1]);

			start = 2;

		}

		for (var i = start; i < l; i += 2) {

			this._updateBBox(this.bbox, this.last.x += n[i], this.last.y += n[i + 1]);

		}

		this.absolute = false;

		break;

	  case "l":

	  case "t":

		for (var i = 0; i < l; i += 2) {

			this._updateBBox(this.bbox, this.last.x += n[i], this.last.y += n[i + 1]);

		}

		this.absolute = false;

		break;

	  case "h":

		for (var i = 0; i < l; ++i) {

			this._updateBBox(this.bbox, this.last.x += n[i], this.last.y);

		}

		this.absolute = false;

		break;

	  case "v":

		for (var i = 0; i < l; ++i) {

			this._updateBBox(this.bbox, this.last.x, this.last.y += n[i]);

		}

		this.absolute = false;

		break;

	  case "c":

		for (var i = 0; i < l; i += 6) {

			this._updateBBox(this.bbox, this.last.x + n[i], this.last.y + n[i + 1]);

			this._updateBBox(this.bbox, this.last.x + n[i + 2], this.last.y + n[i + 3]);

			this._updateBBox(this.bbox, this.last.x += n[i + 4], this.last.y += n[i + 5]);

		}

		this.absolute = false;

		break;

	  case "s":

	  case "q":

		for (var i = 0; i < l; i += 4) {

			this._updateBBox(this.bbox, this.last.x + n[i], this.last.y + n[i + 1]);

			this._updateBBox(this.bbox, this.last.x += n[i + 2], this.last.y += n[i + 3]);

		}

		this.absolute = false;

		break;

	  case "A":

		for (var i = 0; i < l; i += 7) {

			this._updateBBox(this.bbox, n[i + 5], n[i + 6]);

		}

		this.last.x = n[l - 2];

		this.last.y = n[l - 1];

		this.absolute = true;

		break;

	  case "a":

		for (var i = 0; i < l; i += 7) {

			this._updateBBox(this.bbox, this.last.x += n[i + 5], this.last.y += n[i + 6]);

		}

		this.absolute = false;

		break;

	}

	var path = [segment.action];

	for (var i = 0; i < l; ++i) {

		path.push(dojo.gfx.formatNumber(n[i], true));

	}

	if (typeof (this.shape.path) == "string") {

		this.shape.path += path.join("");

	} else {

		this.shape.path = this.shape.path.concat(path);

	}

}, _validSegments:{m:2, l:2, h:1, v:1, c:6, s:4, q:4, t:2, a:7, z:0}, _pushSegment:function (action, args) {

	var group = this._validSegments[action.toLowerCase()];

	if (typeof (group) == "number") {

		if (group) {

			if (args.length >= group) {

				var segment = {action:action, args:args.slice(0, args.length - args.length % group)};

				this.segments.push(segment);

				this._updateWithSegment(segment);

			}

		} else {

			var segment = {action:action, args:[]};

			this.segments.push(segment);

			this._updateWithSegment(segment);

		}

	}

}, _collectArgs:function (array, args) {

	for (var i = 0; i < args.length; ++i) {

		var t = args[i];

		if (typeof (t) == "boolean") {

			array.push(t ? 1 : 0);

		} else {

			if (typeof (t) == "number") {

				array.push(t);

			} else {

				if (t instanceof Array) {

					this._collectArgs(array, t);

				} else {

					if ("x" in t && "y" in t) {

						array.push(t.x);

						array.push(t.y);

					}

				}

			}

		}

	}

}, moveTo:function () {

	var args = [];

	this._collectArgs(args, arguments);

	this._pushSegment(this.absolute ? "M" : "m", args);

	return this;

}, lineTo:function () {

	var args = [];

	this._collectArgs(args, arguments);

	this._pushSegment(this.absolute ? "L" : "l", args);

	return this;

}, hLineTo:function () {

	var args = [];

	this._collectArgs(args, arguments);

	this._pushSegment(this.absolute ? "H" : "h", args);

	return this;

}, vLineTo:function () {

	var args = [];

	this._collectArgs(args, arguments);

	this._pushSegment(this.absolute ? "V" : "v", args);

	return this;

}, curveTo:function () {

	var args = [];

	this._collectArgs(args, arguments);

	this._pushSegment(this.absolute ? "C" : "c", args);

	return this;

}, smoothCurveTo:function () {

	var args = [];

	this._collectArgs(args, arguments);

	this._pushSegment(this.absolute ? "S" : "s", args);

	return this;

}, qCurveTo:function () {

	var args = [];

	this._collectArgs(args, arguments);

	this._pushSegment(this.absolute ? "Q" : "q", args);

	return this;

}, qSmoothCurveTo:function () {

	var args = [];

	this._collectArgs(args, arguments);

	this._pushSegment(this.absolute ? "T" : "t", args);

	return this;

}, arcTo:function () {

	var args = [];

	this._collectArgs(args, arguments);

	for (var i = 2; i < args.length; i += 7) {

		args[i] = -args[i];

	}

	this._pushSegment(this.absolute ? "A" : "a", args);

	return this;

}, closePath:function () {

	this._pushSegment("Z", []);

	return this;

}, _setPath:function (path) {

	var p = path.match(dojo.gfx.pathRegExp);

	this.segments = [];

	this.absolute = true;

	this.bbox = {};

	this.last = {};

	if (!p) {

		return;

	}

	var action = "";

	var args = [];

	for (var i = 0; i < p.length; ++i) {

		var t = p[i];

		var x = parseFloat(t);

		if (isNaN(x)) {

			if (action) {

				this._pushSegment(action, args);

			}

			args = [];

			action = t;

		} else {

			args.push(x);

		}

	}

	this._pushSegment(action, args);

}, setShape:function (newShape) {

	this.shape = dojo.gfx.makeParameters(this.shape, typeof (newShape) == "string" ? {path:newShape} : newShape);

	var path = this.shape.path;

	this.shape.path = [];

	this._setPath(path);

	this.shape.path = this.shape.path.join("");

	return this;

}, _2PI:Math.PI * 2});