Ghost.js module

This commit is contained in:
Tim Mickel 2016-01-13 18:43:56 -05:00
parent 7e7a890d86
commit b1aad9ce58

View file

@ -1,497 +1,510 @@
var Ghost = function () {};
Ghost.maskCanvas = document.createElement('canvas');
Ghost.maskData = {};
Ghost.linemask = 16;
Ghost.maskColor = 16;
import Snap from 'snap';
Ghost.highlight = function (group) {
Ghost.clearLayer();
var g = SVGTools.createGroup(gn('draglayer'), 'ghostgroup');
g.setAttribute('class', 'active3d');
for (var i = 0; i < group.length; i++) {
Ghost.hightlightElem(g, group[i], 0.5, '5,5', 'black', 3);
}
};
import ScratchJr from '../editor/ScratchJr';
import SVGTools from './SVGTools';
import Paint from './Paint';
import PaintAction from './PaintAction';
import Layer from './Layer';
import Vector from '../geom/Vector';
import Transform from './Transform';
import SVG2Canvas from '../utils/SVG2Canvas';
import {gn, setCanvasSize, newDiv} from '../utils/lib';
Ghost.hightlightElem = function (p, elem, opacity, space, c, sw) {
if (elem.tagName == 'g') {
for (var i = 0; i < elem.childElementCount; i++) {
Ghost.hightlightElem(p, elem.childNodes[i], opacity, space, c, sw);
export let maskCanvas = document.createElement('canvas');
export let maskData = {};
export let linemask = 16;
let maskColor = 16;
export default class Ghost {
static highlight (group) {
Ghost.clearLayer();
var g = SVGTools.createGroup(gn('draglayer'), 'ghostgroup');
g.setAttribute('class', 'active3d');
for (var i = 0; i < group.length; i++) {
Ghost.hightlightElem(g, group[i], 0.5, '5,5', 'black', 3);
}
} else {
if (Ghost.hasGhost(elem)) {
}
static hightlightElem (p, elem, opacity, space, c, sw) {
if (elem.tagName == 'g') {
for (var i = 0; i < elem.childElementCount; i++) {
Ghost.hightlightElem(p, elem.childNodes[i], opacity, space, c, sw);
}
} else {
if (Ghost.hasGhost(elem)) {
Ghost.getKid(p, elem, opacity, space, c, sw);
}
}
}
static hasGhost (elem) { // too slow if there are too many--> doing this to minimize overlapping ghosts
if (!elem.id) {
return true;
}
if (elem.id.indexOf('Border') < 0) {
return true;
}
var mfill = elem.id.split('Border')[0];
if (mfill == '') {
return true;
}
return (!gn(mfill));
}
static clearLayer () {
var p = gn('draglayer');
if (!p) {
return;
}
while (p.childElementCount > 0) {
p.removeChild(p.childNodes[0]);
}
}
///////////////////////////////////
// Ghost Management
///////////////////////////////////
static findTarget (evt) {
Ghost.clearLayer();
if (evt == null) {
return null;
}
var pt = PaintAction.getScreenPt(evt);
if (Ghost.outsideArea(Vector.floor(Vector.scale(pt, Paint.currentZoom)), maskCanvas)) {
return null;
} else {
return Ghost.allTools(pt);
}
}
static findWho (evt) { // just gets the object clicked
Ghost.clearLayer();
if (evt == null) {
return null;
}
var pt = PaintAction.getScreenPt(evt);
var color = Ghost.getPtColor(pt);
var id = maskData[color];
var mt = (id && gn(id)) ? gn(id) : null;
return (mt && mt.getAttribute('fixed') != 'yes') ? mt : Ghost.getHitObject(pt);
}
static allTools (pt) {
var color = Ghost.getPtColor(pt);
var id = maskData[color];
if (id) {
return Ghost.hitSomething(pt, id, color);
} else {
return Ghost.notHitted(pt);
}
}
static hitSomething (pt, id) {
var mt = gn(id);
var dogohst = true;
if (mt && mt.getAttribute('relatedto')) {
mt = gn(mt.getAttribute('relatedto'));
}
switch (Paint.mode) {
case 'select':
case 'rotate':
case 'stamper':
case 'scissors':
case 'path':
if (mt.getAttribute('fixed') == 'yes') {
mt = Ghost.getHitObject(pt, Paint.mode == 'path');
}
dogohst = mt ? (mt.getAttribute('fixed') != 'yes') : false;
break;
case 'paintbucket':
case 'camera':
mt = Ghost.getHitObject(pt, Paint.mode == 'path');
break;
}
if (mt && dogohst) {
return Ghost.setGhostTo(mt);
}
return null;
}
static svgHit (pt) {
var rpos = Paint.root.createSVGRect();
rpos.x = pt.x;
rpos.y = pt.y;
rpos.width = 1;
rpos.height = 1;
var matches = Paint.root.getIntersectionList(rpos, null);
if (matches !== null) {
return matches;
} else {
// getIntersectionList() isn't implemented below API Level 19
// and will return null. Call the helper method to manually detect
// the intersection lists.
return Ghost.svgHitHelper(gn('layer1'), pt);
}
}
/**
* Iterates all the path elements of the root and checks if 'pt'
* is inside the path.
* This method uses the SnapSVG library (Apache 2 license) to perform the hit test.
*/
static svgHitHelper (root, pt) {
var matches = [];
if (!root) {
return matches;
}
var paths = root.getElementsByTagName('path');
for (var i = 0; i < paths.length; ++i) {
var pathData = paths[i].getAttribute('d');
if (pathData && Snap.path.isPointInside(pathData, pt.x, pt.y)) {
matches.push(paths[i]);
}
}
return matches;
}
static setGhostTo (mt) {
var g = SVGTools.createGroup(gn('draglayer'), 'ghostlayer');
Ghost.setDashBorder(g, mt, 0.7, '5,5', 'black', 3);
return mt;
}
static notHitted (pt) {
var mt;
switch (Paint.mode) {
case 'select':
case 'rotate':
case 'stamper':
case 'scissors':
mt = Ghost.getActualHit(Ghost.getHitObject(pt, Paint.mode != 'path'), pt);
if (mt && mt.id) {
if (mt.getAttribute('relatedto')) {
mt = gn(mt.getAttribute('relatedto'));
}
var isStencil = (
(mt.id.indexOf('staticbkg') > -1) ||
(mt.getAttribute('stencil') == 'yes') ||
(mt.getAttribute('fixed') == 'yes')
);
if (isStencil) {
mt = undefined;
}
}
break;
case 'camera':
case 'paintbucket':
var targ = Ghost.getHitObject(pt, false);
var target = Ghost.getActualHit(targ, pt);
if (target && target.nodeName != 'g') {
mt = target;
}
break;
}
if (mt) {
return Ghost.setGhostTo(mt);
}
return null;
}
static getActualHit (mt, pt) {
if (!mt) {
return null;
}
pt = Vector.floor(Vector.scale(pt, Paint.currentZoom));
var list = Layer.findUnderMe(mt);
for (var i = 0; i < list.length; i++) {
var obj = list[i];
if (!Ghost.contains(mt, obj)) {
continue;
}
if (!Ghost.hittedSingleObject(obj, pt)) {
continue;
}
mt = obj;
}
return mt;
}
static contains (e1, e2) {
var box1 = SVGTools.getBox(e1);
var box2 = SVGTools.getBox(e2);
var boxi = box1.intersection(box2);
if (boxi.isEmpty()) {
return false;
}
return boxi.isEqual(box2);
}
static hittedSingleObject (obj, pt) {
var ctx = ScratchJr.workingCanvas.getContext('2d');
ctx.clearRect(0, 0, ScratchJr.workingCanvas.width, ScratchJr.workingCanvas.height);
ctx.save();
Layer.drawInContext(obj, ctx, Paint.currentZoom);
ctx.restore();
var pixel = ctx.getImageData(pt.x, pt.y, 1, 1).data;
return pixel[3] != 0;
}
static getPtColor (pt) {
pt = Vector.floor(Vector.scale(pt, Paint.currentZoom));
if (Ghost.outsideArea(pt, maskCanvas)) {
return 0;
}
var ctx = maskCanvas.getContext('2d');
var pixel = ctx.getImageData(pt.x, pt.y, 1, 1).data;
var r = pixel[0];
var g = pixel[1];
var b = pixel[2];
return Ghost.getHex([r, g, b]);
}
static outsideArea (node, canvas) {
if ((node.x < 0) || (node.x > (canvas.width - 1))) {
return true;
}
if ((node.y < 0) || (node.y > (canvas.height - 1))) {
return true;
}
return false;
}
static setDashBorder (p, elem, opacity, space, c, sw) {
if (elem.tagName == 'g') {
for (var i = 0; i < elem.childElementCount; i++) {
Ghost.setDashBorder(p, elem.childNodes[i], opacity, space, c, sw);
}
} else {
Ghost.getKid(p, elem, opacity, space, c, sw);
}
}
};
Ghost.hasGhost = function (elem) { // too slow if there are too many--> doing this to minimize overlapping ghosts
if (!elem.id) {
return true;
}
if (elem.id.indexOf('Border') < 0) {
return true;
}
var mfill = elem.id.split('Border')[0];
if (mfill == '') {
return true;
}
return (!gn(mfill));
};
Ghost.clearLayer = function () {
var p = gn('draglayer');
if (!p) {
return;
}
while (p.childElementCount > 0) {
p.removeChild(p.childNodes[0]);
}
};
///////////////////////////////////
// Ghost Management
///////////////////////////////////
Ghost.findTarget = function (evt) {
Ghost.clearLayer();
if (evt == null) {
return null;
}
var pt = PaintAction.getScreenPt(evt);
if (Ghost.outsideArea(Vector.floor(Vector.scale(pt, Paint.currentZoom)), Ghost.maskCanvas)) {
return null;
} else {
return Ghost.allTools(pt);
}
};
Ghost.findWho = function (evt) { // just gets the object clicked
Ghost.clearLayer();
if (evt == null) {
return null;
}
var pt = PaintAction.getScreenPt(evt);
var color = Ghost.getPtColor(pt);
var id = Ghost.maskData[color];
var mt = (id && gn(id)) ? gn(id) : null;
return (mt && mt.getAttribute('fixed') != 'yes') ? mt : Ghost.getHitObject(pt);
};
Ghost.allTools = function (pt) {
var color = Ghost.getPtColor(pt);
var id = Ghost.maskData[color];
if (id) {
return Ghost.hitSomething(pt, id, color);
} else {
return Ghost.notHitted(pt);
}
};
Ghost.hitSomething = function (pt, id) {
var mt = gn(id);
var dogohst = true;
if (mt && mt.getAttribute('relatedto')) {
mt = gn(mt.getAttribute('relatedto'));
}
switch (Paint.mode) {
case 'select':
case 'rotate':
case 'stamper':
case 'scissors':
case 'path':
if (mt.getAttribute('fixed') == 'yes') {
mt = Ghost.getHitObject(pt, Paint.mode == 'path');
static getKid (p, elem, opacity, space, c, sw) {
if (!sw) {
sw = elem.getAttribute('stroke-width');
}
dogohst = mt ? (mt.getAttribute('fixed') != 'yes') : false;
break;
case 'paintbucket':
case 'camera':
mt = Ghost.getHitObject(pt, Paint.mode == 'path');
break;
}
if (mt && dogohst) {
return Ghost.setGhostTo(mt);
}
return null;
};
Ghost.svgHit = function (pt) {
var rpos = Paint.root.createSVGRect();
rpos.x = pt.x;
rpos.y = pt.y;
rpos.width = 1;
rpos.height = 1;
var matches = Paint.root.getIntersectionList(rpos, null);
if (matches !== null) {
return matches;
} else {
// getIntersectionList() isn't implemented below API Level 19
// and will return null. Call the helper method to manually detect
// the intersection lists.
return Ghost.svgHitHelper(gn('layer1'), pt);
}
};
/**
* Iterates all the path elements of the root and checks if 'pt'
* is inside the path.
* This method uses the SnapSVG library (Apache 2 license) to perform the hit test.
*/
Ghost.svgHitHelper = function (root, pt) {
var matches = [];
if (!root) {
return matches;
}
var paths = root.getElementsByTagName('path');
for (var i = 0; i < paths.length; ++i) {
var pathData = paths[i].getAttribute('d');
if (pathData && Snap.path.isPointInside(pathData, pt.x, pt.y)) {
matches.push(paths[i]);
var attr = SVGTools.attributeTable[elem.tagName];
if (!attr) {
attr = [];
}
}
var drawattr = SVGTools.attributePenTable[elem.tagName];
if (!drawattr) {
drawattr = [];
}
// black outline
var shape = document.createElementNS(Paint.xmlns, elem.tagName);
p.appendChild(shape);
return matches;
};
Ghost.setGhostTo = function (mt) {
var g = SVGTools.createGroup(gn('draglayer'), 'ghostlayer');
Ghost.setDashBorder(g, mt, 0.7, '5,5', 'black', 3);
return mt;
};
Ghost.notHitted = function (pt) {
var mt;
switch (Paint.mode) {
case 'select':
case 'rotate':
case 'stamper':
case 'scissors':
mt = Ghost.getActualHit(Ghost.getHitObject(pt, Paint.mode != 'path'), pt);
if (mt && mt.id) {
if (mt.getAttribute('relatedto')) {
mt = gn(mt.getAttribute('relatedto'));
attr = attr.concat(drawattr);
for (var i = 0; i < attr.length; i++) {
if (elem.getAttribute(attr[i]) == null) {
continue;
}
var isStencil = (
(mt.id.indexOf('staticbkg') > -1) ||
(mt.getAttribute('stencil') == 'yes') ||
(mt.getAttribute('fixed') == 'yes')
);
if (isStencil) {
mt = undefined;
shape.setAttribute(attr[i], elem.getAttribute(attr[i]));
}
shape.setAttribute('fill', 'none');
shape.setAttribute('stroke', c);
shape.setAttribute('stroke-width', sw / Paint.currentZoom);
shape.setAttribute('class', 'active3d');
var ang = Transform.getRotationAngle(elem);
if (ang != 0) {
Transform.applyRotation(shape, ang);
}
if (opacity) {
shape.setAttribute('opacity', opacity);
}
// white dashed
var dash = document.createElementNS(Paint.xmlns, elem.tagName);
p.appendChild(dash);
attr = attr.concat(drawattr);
for (var j = 0; j < attr.length; j++) {
if (elem.getAttribute(attr[j]) == null) {
continue;
}
dash.setAttribute(attr[j], elem.getAttribute(attr[j]));
}
dash.setAttribute('fill', 'none');
dash.setAttribute('stroke', 'white');
dash.setAttribute('stroke-width', 3 / Paint.currentZoom);
dash.setAttribute('stroke-dasharray', space);
dash.setAttribute('class', 'active3d');
if (opacity) {
dash.setAttribute('opacity', opacity);
}
if (ang != 0) {
Transform.applyRotation(dash, ang);
}
return dash;
}
//////////////////////////////////////////////////
// Offscreen for cursor
//////////////////////////////////////////////////
static drawOffscreen () {
setCanvasSize(
maskCanvas,
Math.round(Number(Paint.root.getAttribute('width')) * Paint.currentZoom),
Math.round(Number(Paint.root.getAttribute('height')) * Paint.currentZoom)
);
var ctx = maskCanvas.getContext('2d');
ctx.clearRect(0, 0, maskCanvas.width, maskCanvas.height);
var p = gn('layer1');
if (!p) {
return;
}
maskData = {};
maskColor = 16;
Ghost.drawElements(p, ctx);
}
static drawElements (p, ctx) {
for (var i = 0; i < p.childElementCount; i++) {
var elem = p.childNodes[i];
if (elem.id == 'pathdots') {
continue;
}
if (elem.tagName == 'image') {
continue;
}
if (elem.tagName == 'clipPath') {
continue;
}
if (elem.nodeName == 'g') {
Ghost.drawElements(elem, ctx);
} else {
Ghost.drawElement(elem, ctx);
}
}
break;
case 'camera':
case 'paintbucket':
var targ = Ghost.getHitObject(pt, false);
var target = Ghost.getActualHit(targ, pt);
if (target && target.nodeName != 'g') {
mt = target;
}
break;
}
if (mt) {
return Ghost.setGhostTo(mt);
}
return null;
};
Ghost.getActualHit = function (mt, pt) {
if (!mt) {
return null;
}
pt = Vector.floor(Vector.scale(pt, Paint.currentZoom));
var list = Layer.findUnderMe(mt);
for (var i = 0; i < list.length; i++) {
var obj = list[i];
if (!Ghost.contains(mt, obj)) {
continue;
}
if (!Ghost.hittedSingleObject(obj, pt)) {
continue;
}
mt = obj;
}
return mt;
};
Ghost.contains = function (e1, e2) {
var box1 = SVGTools.getBox(e1);
var box2 = SVGTools.getBox(e2);
var boxi = box1.intersection(box2);
if (boxi.isEmpty()) {
return false;
}
return boxi.isEqual(box2);
};
Ghost.hittedSingleObject = function (obj, pt) {
var ctx = ScratchJr.workingCanvas.getContext('2d');
ctx.clearRect(0, 0, ScratchJr.workingCanvas.width, ScratchJr.workingCanvas.height);
ctx.save();
Layer.drawInContext(obj, ctx, Paint.currentZoom);
ctx.restore();
var pixel = ctx.getImageData(pt.x, pt.y, 1, 1).data;
return pixel[3] != 0;
};
Ghost.getPtColor = function (pt) {
pt = Vector.floor(Vector.scale(pt, Paint.currentZoom));
if (Ghost.outsideArea(pt, Ghost.maskCanvas)) {
return 0;
}
var ctx = Ghost.maskCanvas.getContext('2d');
var pixel = ctx.getImageData(pt.x, pt.y, 1, 1).data;
var r = pixel[0];
var g = pixel[1];
var b = pixel[2];
return Ghost.getHex([r, g, b]);
};
Ghost.outsideArea = function (node, canvas) {
if ((node.x < 0) || (node.x > (canvas.width - 1))) {
return true;
}
if ((node.y < 0) || (node.y > (canvas.height - 1))) {
return true;
}
return false;
};
Ghost.setDashBorder = function (p, elem, opacity, space, c, sw) {
if (elem.tagName == 'g') {
for (var i = 0; i < elem.childElementCount; i++) {
Ghost.setDashBorder(p, elem.childNodes[i], opacity, space, c, sw);
}
} else {
Ghost.getKid(p, elem, opacity, space, c, sw);
}
};
Ghost.getKid = function (p, elem, opacity, space, c, sw) {
if (!sw) {
sw = elem.getAttribute('stroke-width');
}
var attr = SVGTools.attributeTable[elem.tagName];
if (!attr) {
attr = [];
}
var drawattr = SVGTools.attributePenTable[elem.tagName];
if (!drawattr) {
drawattr = [];
}
// black outline
var shape = document.createElementNS(Paint.xmlns, elem.tagName);
p.appendChild(shape);
attr = attr.concat(drawattr);
for (var i = 0; i < attr.length; i++) {
if (elem.getAttribute(attr[i]) == null) {
continue;
}
shape.setAttribute(attr[i], elem.getAttribute(attr[i]));
}
shape.setAttribute('fill', 'none');
shape.setAttribute('stroke', c);
shape.setAttribute('stroke-width', sw / Paint.currentZoom);
shape.setAttribute('class', 'active3d');
var ang = Transform.getRotationAngle(elem);
if (ang != 0) {
Transform.applyRotation(shape, ang);
}
if (opacity) {
shape.setAttribute('opacity', opacity);
}
// white dashed
var dash = document.createElementNS(Paint.xmlns, elem.tagName);
p.appendChild(dash);
attr = attr.concat(drawattr);
for (var j = 0; j < attr.length; j++) {
if (elem.getAttribute(attr[j]) == null) {
continue;
}
dash.setAttribute(attr[j], elem.getAttribute(attr[j]));
}
dash.setAttribute('fill', 'none');
dash.setAttribute('stroke', 'white');
dash.setAttribute('stroke-width', 3 / Paint.currentZoom);
dash.setAttribute('stroke-dasharray', space);
dash.setAttribute('class', 'active3d');
if (opacity) {
dash.setAttribute('opacity', opacity);
}
if (ang != 0) {
Transform.applyRotation(dash, ang);
}
return dash;
};
//////////////////////////////////////////////////
// Offscreen for cursor
//////////////////////////////////////////////////
Ghost.drawOffscreen = function () {
setCanvasSize(
Ghost.maskCanvas,
Math.round(Number(Paint.root.getAttribute('width')) * Paint.currentZoom),
Math.round(Number(Paint.root.getAttribute('height')) * Paint.currentZoom)
);
var ctx = Ghost.maskCanvas.getContext('2d');
ctx.clearRect(0, 0, Ghost.maskCanvas.width, Ghost.maskCanvas.height);
var p = gn('layer1');
if (!p) {
return;
}
Ghost.maskData = {};
Ghost.maskColor = 16;
Ghost.drawElements(p, ctx);
};
Ghost.drawElements = function (p, ctx) {
for (var i = 0; i < p.childElementCount; i++) {
var elem = p.childNodes[i];
if (elem.id == 'pathdots') {
continue;
}
if (elem.tagName == 'image') {
continue;
}
if (elem.tagName == 'clipPath') {
continue;
}
if (elem.nodeName == 'g') {
Ghost.drawElements(elem, ctx);
} else {
Ghost.drawElement(elem, ctx);
}
}
};
Ghost.drawElement = function (elem, ctx) {
var c = Ghost.getRGB(Ghost.maskColor);
var bc = Ghost.getRGB(Ghost.maskColor + 8);
Ghost.maskColor += 16;
ctx.save();
var nostroke = (!elem.getAttribute('stroke')) || (elem.getAttribute('stroke') == 'none');
var n = Number(elem.getAttribute('stroke-width'));
ctx.lineWidth = nostroke ? 0 : n;
ctx.fillStyle = (elem.getAttribute('fill') == 'none') ?
'rgba(0,0,0,0)' : 'rgba(' + c[0] + ',' + c[1] + ',' + c[2] + ',255)';
ctx.strokeStyle = !elem.getAttribute('stroke') ?
'rgba(0,0,0,0)' : 'rgba(' + bc[0] + ',' + bc[1] + ',' + bc[2] + ',255)';
if (!SVG2Canvas.isCloseDPath(elem)) {
ctx.strokeStyle = 'rgba(' + c[0] + ',' + c[1] + ',' + c[2] + ',255)';
}
if (elem.id.indexOf('pathborder_image') > -1) {
ctx.fillStyle = 'rgba(' + c[0] + ',' + c[1] + ',' + c[2] + ',255)';
}
if (!elem.getAttribute('fill') && !elem.getAttribute('stroke')) {
ctx.fillStyle = 'rgba(' + bc[0] + ',' + bc[1] + ',' + bc[2] + ',255)';
}
Ghost.maskData[Ghost.getHex(c)] = elem.id;
Ghost.maskData[Ghost.getHex(bc)] = elem.id;
var rot = Transform.extract(elem, 4);
if (rot.angle != 0) {
Layer.rotateFromCenter(ctx, elem, rot.angle);
}
ctx.scale(Paint.currentZoom, Paint.currentZoom);
SVG2Canvas.processXMLnode(elem, ctx, true);
ctx.restore();
if (SVG2Canvas.isCloseDPath(elem)) {
return;
}
ctx.save();
ctx.scale(Paint.currentZoom, Paint.currentZoom);
ctx.lineWidth = (Ghost.linemask) < n ? n : Ghost.linemask;
ctx.fillStyle = 'rgba(' + c[0] + ',' + c[1] + ',' + c[2] + ',255)';
ctx.strokeStyle = 'rgba(' + bc[0] + ',' + bc[1] + ',' + bc[2] + ',255)';
rot = Transform.extract(elem, 4);
if (rot.angle != 0) {
Layer.rotateFromCenter(ctx, elem, rot.angle);
}
SVG2Canvas.renderPathTips(elem, ctx);
ctx.restore();
};
Ghost.getRGB = function (color) {
return [Number((color >> 16) & 255), Number((color >> 8) & 255), Number(color & 255)];
};
Ghost.getHex = function (rgb) {
var r = rgb[0].toString(16);
if (r.length < 2) {
r = '0' + r;
}
var g = rgb[1].toString(16);
if (g.length < 2) {
g = '0' + g;
}
var b = rgb[2].toString(16);
if (b.length < 2) {
b = '0' + b;
}
return r + g + b;
};
Ghost.getHitObject = function (pt, isTip, exclude) {
var list = Ghost.svgHit(pt);
pt = Vector.floor(Vector.scale(pt, Paint.currentZoom));
if (!Paint.root) {
return false;
}
setCanvasSize(ScratchJr.workingCanvas,
Math.round(Paint.root.getAttribute('width') * Paint.currentZoom),
Math.round(Paint.root.getAttribute('height') * Paint.currentZoom)
);
var ctx = ScratchJr.workingCanvas.getContext('2d');
if (Ghost.outsideArea(pt, ScratchJr.workingCanvas)) {
return null;
}
ctx.clearRect(0, 0, ScratchJr.workingCanvas.width, ScratchJr.workingCanvas.height);
return Ghost.findHit(list, pt, ScratchJr.workingCanvas.getContext('2d'), isTip, exclude);
};
Ghost.findHit = function (list, pt, ctx, isTip, exclude) {
for (var i = list.length - 1; i >= 0; i--) {
var elem = list[i];
if (exclude && (elem == exclude)) {
continue;
}
var lw = elem.getAttribute('stroke-width') ? elem.getAttribute('stroke-width') : 0;
static drawElement (elem, ctx) {
var c = Ghost.getRGB(maskColor);
var bc = Ghost.getRGB(maskColor + 8);
maskColor += 16;
ctx.save();
Layer.drawInContext(elem, ctx, Paint.currentZoom, lw, isTip);
ctx.restore();
var pixel = ctx.getImageData(pt.x, pt.y, 1, 1).data;
if (pixel[3] != 0) {
return elem;
var nostroke = (!elem.getAttribute('stroke')) || (elem.getAttribute('stroke') == 'none');
var n = Number(elem.getAttribute('stroke-width'));
ctx.lineWidth = nostroke ? 0 : n;
ctx.fillStyle = (elem.getAttribute('fill') == 'none') ?
'rgba(0,0,0,0)' : 'rgba(' + c[0] + ',' + c[1] + ',' + c[2] + ',255)';
ctx.strokeStyle = !elem.getAttribute('stroke') ?
'rgba(0,0,0,0)' : 'rgba(' + bc[0] + ',' + bc[1] + ',' + bc[2] + ',255)';
if (!SVG2Canvas.isCloseDPath(elem)) {
ctx.strokeStyle = 'rgba(' + c[0] + ',' + c[1] + ',' + c[2] + ',255)';
}
if (elem.id.indexOf('pathborder_image') > -1) {
ctx.fillStyle = 'rgba(' + c[0] + ',' + c[1] + ',' + c[2] + ',255)';
}
if (!elem.getAttribute('fill') && !elem.getAttribute('stroke')) {
ctx.fillStyle = 'rgba(' + bc[0] + ',' + bc[1] + ',' + bc[2] + ',255)';
}
maskData[Ghost.getHex(c)] = elem.id;
maskData[Ghost.getHex(bc)] = elem.id;
var rot = Transform.extract(elem, 4);
if (rot.angle != 0) {
Layer.rotateFromCenter(ctx, elem, rot.angle);
}
ctx.scale(Paint.currentZoom, Paint.currentZoom);
SVG2Canvas.processXMLnode(elem, ctx, true);
ctx.restore();
if (SVG2Canvas.isCloseDPath(elem)) {
return;
}
ctx.save();
ctx.scale(Paint.currentZoom, Paint.currentZoom);
ctx.lineWidth = (linemask) < n ? n : linemask;
ctx.fillStyle = 'rgba(' + c[0] + ',' + c[1] + ',' + c[2] + ',255)';
ctx.strokeStyle = 'rgba(' + bc[0] + ',' + bc[1] + ',' + bc[2] + ',255)';
rot = Transform.extract(elem, 4);
if (rot.angle != 0) {
Layer.rotateFromCenter(ctx, elem, rot.angle);
}
SVG2Canvas.renderPathTips(elem, ctx);
ctx.restore();
}
return null;
};
////////////////////
// Debugging hit masks
////////////////////////
static getRGB (color) {
return [Number((color >> 16) & 255), Number((color >> 8) & 255), Number(color & 255)];
}
Ghost.showmask = function () {
var mask = newDiv(Paint.frame, 0, 0, Ghost.maskCanvas.width, Ghost.maskCanvas.height,
{
position: 'absolute',
zIndex: ScratchJr.layerTop + 20
});
mask.setAttribute('id', 'ghostmask');
mask.appendChild(Ghost.maskCanvas);
};
static getHex (rgb) {
var r = rgb[0].toString(16);
if (r.length < 2) {
r = '0' + r;
}
var g = rgb[1].toString(16);
if (g.length < 2) {
g = '0' + g;
}
var b = rgb[2].toString(16);
if (b.length < 2) {
b = '0' + b;
}
return r + g + b;
}
Ghost.off = function () {
gn('ghostmask').style.visibility = 'hidden';
};
static getHitObject (pt, isTip, exclude) {
var list = Ghost.svgHit(pt);
pt = Vector.floor(Vector.scale(pt, Paint.currentZoom));
if (!Paint.root) {
return false;
}
setCanvasSize(ScratchJr.workingCanvas,
Math.round(Paint.root.getAttribute('width') * Paint.currentZoom),
Math.round(Paint.root.getAttribute('height') * Paint.currentZoom)
);
var ctx = ScratchJr.workingCanvas.getContext('2d');
if (Ghost.outsideArea(pt, ScratchJr.workingCanvas)) {
return null;
}
ctx.clearRect(0, 0, ScratchJr.workingCanvas.width, ScratchJr.workingCanvas.height);
return Ghost.findHit(list, pt, ScratchJr.workingCanvas.getContext('2d'), isTip, exclude);
}
Ghost.on = function () {
gn('ghostmask').style.visibility = 'visible';
};
static findHit (list, pt, ctx, isTip, exclude) {
for (var i = list.length - 1; i >= 0; i--) {
var elem = list[i];
if (exclude && (elem == exclude)) {
continue;
}
var lw = elem.getAttribute('stroke-width') ? elem.getAttribute('stroke-width') : 0;
ctx.save();
Layer.drawInContext(elem, ctx, Paint.currentZoom, lw, isTip);
ctx.restore();
var pixel = ctx.getImageData(pt.x, pt.y, 1, 1).data;
if (pixel[3] != 0) {
return elem;
}
}
return null;
}
////////////////////
// Debugging hit masks
////////////////////////
static showmask () {
var mask = newDiv(Paint.frame, 0, 0, maskCanvas.width, maskCanvas.height,
{
position: 'absolute',
zIndex: ScratchJr.layerTop + 20
});
mask.setAttribute('id', 'ghostmask');
mask.appendChild(maskCanvas);
}
static off () {
gn('ghostmask').style.visibility = 'hidden';
}
static on () {
gn('ghostmask').style.visibility = 'visible';
}
}