316 lines
8.7 KiB
JavaScript
316 lines
8.7 KiB
JavaScript
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var Class = require('../../core/class');
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var Transform = require('../../core/transform');
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var Color = require('../../core/color');
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var Node = require('./node');
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var DOM = require('./dom');
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var precision = 100;
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var defaultBox = { left: 0, top: 0, width: 500, height: 500 };
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module.exports = Class(Node, {
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element_initialize: Node.prototype.initialize,
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initialize: function(tag){
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this.element_initialize(tag);
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var element = this.element;
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var skew = this.skewElement = DOM.createElement('skew');
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skew.on = true;
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element.appendChild(skew);
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var fill = this.fillElement = DOM.createElement('fill');
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fill.on = false;
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element.appendChild(fill);
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var stroke = this.strokeElement = DOM.createElement('stroke');
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stroke.on = false;
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element.appendChild(stroke);
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},
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/* transform */
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_transform: function(){
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var container = this.parentNode;
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// Active Transformation Matrix
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var m = container ? new Transform(container._activeTransform).transform(this) : this;
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// Box in shape user space
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var box = this._boxCoords || this._size || defaultBox;
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var originX = box.left || 0,
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originY = box.top || 0,
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width = box.width || 1,
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height = box.height || 1;
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// Flipped
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var flip = m.yx / m.xx > m.yy / m.xy;
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if (m.xx < 0 ? m.xy >= 0 : m.xy < 0) flip = !flip;
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flip = flip ? -1 : 1;
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m = new Transform().scale(flip, 1).transform(m);
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// Rotation is approximated based on the transform
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var rotation = Math.atan2(-m.xy, m.yy) * 180 / Math.PI;
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// Reverse the rotation, leaving the final transform in box space
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var rad = rotation * Math.PI / 180, sin = Math.sin(rad), cos = Math.cos(rad);
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var transform = new Transform(
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(m.xx * cos - m.xy * sin),
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(m.yx * cos - m.yy * sin) * flip,
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(m.xy * cos + m.xx * sin) * flip,
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(m.yy * cos + m.yx * sin)
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);
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var rotationTransform = new Transform().rotate(rotation, 0, 0);
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var shapeToBox = new Transform().rotate(-rotation, 0, 0).transform(m).moveTo(0,0);
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// Scale box after reversing rotation
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width *= Math.abs(shapeToBox.xx);
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height *= Math.abs(shapeToBox.yy);
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// Place box
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var left = m.x, top = m.y;
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// Compensate for offset by center origin rotation
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var vx = -width / 2, vy = -height / 2;
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var point = rotationTransform.point(vx, vy);
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left -= point.x - vx;
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top -= point.y - vy;
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// Adjust box position based on offset
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var rsm = new Transform(m).moveTo(0,0);
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point = rsm.point(originX, originY);
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left += point.x;
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top += point.y;
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if (flip < 0) left = -left - width;
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// Place transformation origin
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var point0 = rsm.point(-originX, -originY);
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var point1 = rotationTransform.point(width, height);
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var point2 = rotationTransform.point(width, 0);
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var point3 = rotationTransform.point(0, height);
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var minX = Math.min(0, point1.x, point2.x, point3.x),
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maxX = Math.max(0, point1.x, point2.x, point3.x),
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minY = Math.min(0, point1.y, point2.y, point3.y),
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maxY = Math.max(0, point1.y, point2.y, point3.y);
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var transformOriginX = (point0.x - point1.x / 2) / (maxX - minX) * flip,
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transformOriginY = (point0.y - point1.y / 2) / (maxY - minY);
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// Adjust the origin
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point = shapeToBox.point(originX, originY);
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originX = point.x;
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originY = point.y;
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// Scale stroke
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var strokeWidth = this._strokeWidth;
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if (strokeWidth){
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// Scale is the hypothenus between the two vectors
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// TODO: Use area calculation instead
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var vx = m.xx + m.xy, vy = m.yy + m.yx;
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strokeWidth *= Math.sqrt(vx * vx + vy * vy) / Math.sqrt(2);
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}
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// convert to multiplied precision space
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originX *= precision;
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originY *= precision;
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left *= precision;
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top *= precision;
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width *= precision;
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height *= precision;
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// Set box
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var element = this.element;
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element.coordorigin = originX + ',' + originY;
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element.coordsize = width + ',' + height;
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element.style.left = left + 'px';
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element.style.top = top + 'px';
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element.style.width = width;
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element.style.height = height;
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element.style.rotation = rotation.toFixed(8);
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element.style.flip = flip < 0 ? 'x' : '';
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// Set transform
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var skew = this.skewElement;
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skew.matrix = [transform.xx.toFixed(4), transform.xy.toFixed(4), transform.yx.toFixed(4), transform.yy.toFixed(4), 0, 0];
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skew.origin = transformOriginX + ',' + transformOriginY;
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// Set stroke
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this.strokeElement.weight = strokeWidth + 'px';
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},
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/* styles */
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_createGradient: function(style, stops){
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var fill = this.fillElement;
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// Temporarily eject the fill from the DOM
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this.element.removeChild(fill);
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fill.type = style;
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fill.method = 'none';
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fill.rotate = true;
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var colors = [], color1, color2;
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var addColor = function(offset, color){
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color = Color.detach(color);
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if (color1 == null) color1 = color2 = color;
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else color2 = color;
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colors.push(offset + ' ' + color[0]);
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};
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// Enumerate stops, assumes offsets are enumerated in order
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if ('length' in stops) for (var i = 0, l = stops.length - 1; i <= l; i++) addColor(i / l, stops[i]);
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else for (var offset in stops) addColor(offset, stops[offset]);
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fill.color = color1[0];
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fill.color2 = color2[0];
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//if (fill.colors) fill.colors.value = colors; else
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fill.colors = colors;
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// Opacity order gets flipped when color stops are specified
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fill.opacity = color2[1];
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fill['ao:opacity2'] = color1[1];
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fill.on = true;
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this.element.appendChild(fill);
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return fill;
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},
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_setColor: function(type, color){
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var element = type == 'fill' ? this.fillElement : this.strokeElement;
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if (color == null){
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element.on = false;
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} else {
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color = Color.detach(color);
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element.color = color[0];
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element.opacity = color[1];
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element.on = true;
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}
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},
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fill: function(color){
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if (arguments.length > 1){
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this.fillLinear(arguments);
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} else {
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this._boxCoords = defaultBox;
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var fill = this.fillElement;
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fill.type = 'solid';
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fill.color2 = '';
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fill['ao:opacity2'] = '';
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if (fill.colors) fill.colors.value = '';
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this._setColor('fill', color);
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}
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return this;
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},
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fillRadial: function(stops, focusX, focusY, radiusX, radiusY, centerX, centerY){
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var fill = this._createGradient('gradientradial', stops);
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if (focusX == null) focusX = this.left + this.width * 0.5;
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if (focusY == null) focusY = this.top + this.height * 0.5;
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if (radiusY == null) radiusY = radiusX || (this.height * 0.5);
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if (radiusX == null) radiusX = this.width * 0.5;
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if (centerX == null) centerX = focusX;
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if (centerY == null) centerY = focusY;
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centerX += centerX - focusX;
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centerY += centerY - focusY;
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var box = this._boxCoords = {
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left: centerX - radiusX * 2,
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top: centerY - radiusY * 2,
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width: radiusX * 4,
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height: radiusY * 4
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};
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focusX -= box.left;
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focusY -= box.top;
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focusX /= box.width;
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focusY /= box.height;
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fill.focussize = '0 0';
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fill.focusposition = focusX + ',' + focusY;
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fill.focus = '50%';
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this._transform();
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return this;
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},
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fillLinear: function(stops, x1, y1, x2, y2){
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var fill = this._createGradient('gradient', stops);
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fill.focus = '100%';
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if (arguments.length == 5){
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var w = Math.abs(x2 - x1), h = Math.abs(y2 - y1);
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this._boxCoords = {
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left: Math.min(x1, x2),
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top: Math.min(y1, y2),
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width: w < 1 ? h : w,
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height: h < 1 ? w : h
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};
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fill.angle = (360 + Math.atan2((x2 - x1) / h, (y2 - y1) / w) * 180 / Math.PI) % 360;
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} else {
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this._boxCoords = null;
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fill.angle = (x1 == null) ? 0 : (90 + x1) % 360;
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}
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this._transform();
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return this;
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},
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fillImage: function(url, width, height, left, top, color1, color2){
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var fill = this.fillElement;
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if (color1 != null){
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color1 = Color.detach(color1);
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if (color2 != null) color2 = Color.detach(color2);
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fill.type = 'pattern';
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fill.color = color1[0];
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fill.color2 = color2 == null ? color1[0] : color2[0];
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fill.opacity = color2 == null ? 0 : color2[1];
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fill['ao:opacity2'] = color1[1];
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} else {
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fill.type = 'tile';
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fill.color = '';
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fill.color2 = '';
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fill.opacity = 1;
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fill['ao:opacity2'] = 1;
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}
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if (fill.colors) fill.colors.value = '';
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fill.rotate = true;
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fill.src = url;
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fill.size = '1,1';
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fill.position = '0,0';
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fill.origin = '0,0';
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fill.aspect = 'ignore'; // ignore, atleast, atmost
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fill.on = true;
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if (!left) left = 0;
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if (!top) top = 0;
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this._boxCoords = width ? { left: left + 0.5, top: top + 0.5, width: width, height: height } : null;
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this._transform();
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return this;
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},
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/* stroke */
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stroke: function(color, width, cap, join){
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var stroke = this.strokeElement;
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this._strokeWidth = (width != null) ? width : 1;
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stroke.weight = (width != null) ? width + 'px' : 1;
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stroke.endcap = (cap != null) ? ((cap == 'butt') ? 'flat' : cap) : 'round';
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stroke.joinstyle = (join != null) ? join : 'round';
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this._setColor('stroke', color);
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return this;
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}
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});
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