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<h1 class="page-title">Source: editor/extensions/ext-polystar/ext-polystar.js</h1>
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<pre class="prettyprint source linenums"><code>/**
* @file ext-polystar.js
*
*
* @copyright 2010 CloudCanvas, Inc. All rights reserved
* @copyright 2021 Optimistik SAS, Inc. All rights reserved
* @license MIT
*
*/
const name = "polystar";
const loadExtensionTranslation = async function (svgEditor) {
let translationModule;
const lang = svgEditor.configObj.pref('lang');
try {
// eslint-disable-next-line no-unsanitized/method
translationModule = await import(`./locale/${lang}.js`);
} catch (_error) {
// eslint-disable-next-line no-console
console.warn(`Missing translation (${lang}) for ${name} - using 'en'`);
// eslint-disable-next-line no-unsanitized/method
translationModule = await import(`./locale/en.js`);
}
svgEditor.i18next.addResourceBundle(lang, name, translationModule.default);
};
export default {
name,
async init(_S) {
const svgEditor = this;
const { ChangeElementCommand } = _S; // , svgcontent,
const addToHistory = function (cmd) { svgCanvas.undoMgr.addCommandToHistory(cmd); };
const { svgCanvas } = svgEditor;
const { $id } = svgCanvas;
let selElems;
let started;
let newFO;
await loadExtensionTranslation(svgEditor);
/**
* @param {boolean} on true=display
* @param {string} tool "star" or "polygone"
* @returns {void}
*/
const showPanel = (on, tool) => {
if (on) {
$id(`${tool}_panel`).style.removeProperty('display');
} else {
$id(`${tool}_panel`).style.display = 'none';
}
};
/**
*
* @param {string} attr attribute to change
* @param {string|Float} val new value
* @returns {void}
*/
const setAttr = (attr, val) => {
svgCanvas.changeSelectedAttribute(attr, val);
svgCanvas.call("changed", selElems);
};
/**
* @param {Float} n angle
* @return {Float} cotangeante
*/
const cot = (n) => 1 / Math.tan(n);
/**
* @param {Float} n angle
* @returns {Float} sec
*/
const sec = (n) => 1 / Math.cos(n);
return {
name: svgEditor.i18next.t(`${name}:name`),
// The callback should be used to load the DOM with the appropriate UI items
callback() {
// Add the button and its handler(s)
// Note: the star extension needs to be loaded before the polygon extension
const fbtitle = `${name}:title`;
const title_star = `${name}:buttons.0.title`;
const title_polygon = `${name}:buttons.1.title`;
// eslint-disable-next-line no-unsanitized/property
const buttonTemplate = `
<se-flyingbutton id="tools_polygon" title="${fbtitle}">
<se-button id="tool_star" title="${title_star}" src="star.svg">
</se-button>
<se-button id="tool_polygon" title="${title_polygon}" src="polygon.svg">
</se-button>
</se-flyingbutton>
`;
svgCanvas.insertChildAtIndex($id('tools_left'), buttonTemplate, 10);
// handler
$id("tool_star").addEventListener("click", () => {
if (this.leftPanel.updateLeftPanel("tool_star")) {
svgCanvas.setMode("star");
showPanel(true, "star");
showPanel(false, "polygon");
}
});
$id("tool_polygon").addEventListener("click", () => {
if (this.leftPanel.updateLeftPanel("tool_polygon")) {
svgCanvas.setMode("polygon");
showPanel(true, "polygon");
showPanel(false, "star");
}
});
const label0 = `${name}:contextTools.0.label`;
const title0 = `${name}:contextTools.0.title`;
const label1 = `${name}:contextTools.1.label`;
const title1 = `${name}:contextTools.1.title`;
const label2 = `${name}:contextTools.2.label`;
const title2 = `${name}:contextTools.2.title`;
const label3 = `${name}:contextTools.3.label`;
const title3 = `${name}:contextTools.3.title`;
// Add the context panel and its handler(s)
const panelTemplate = document.createElement("template");
// eslint-disable-next-line no-unsanitized/property
panelTemplate.innerHTML = `
<div id="star_panel">
<se-spin-input id="starNumPoints" label="${label0}" min=1 step=1 value=5 title="${title0}">
</se-spin-input>
<se-spin-input id="RadiusMultiplier" label="${label1}" min=1 step=2.5 value=3 title="${title1}">
</se-spin-input>
<se-spin-input id="radialShift" min=0 step=1 value=0 label="${label2}" title="${title2}">
</se-spin-input>
</div>
<div id="polygon_panel">
<se-spin-input size="3" id="polySides" min=1 step=1 value=5 label="${label3}" title="${title3}">
</se-spin-input>
</div>
`;
//add handlers for the panel
$id("tools_top").appendChild(panelTemplate.content.cloneNode(true));
// don't display the panels on start
showPanel(false, "star");
showPanel(false, "polygon");
$id("starNumPoints").addEventListener("change", (event) => {
setAttr("point", event.target.value);
const orient = 'point';
const point = event.target.value;
let i = selElems.length;
while (i--) {
const elem = selElems[i];
if (elem.hasAttribute('r')) {
const oldPoint = elem.getAttribute('point');
const oldPoints = elem.getAttribute('points');
const radialshift = elem.getAttribute('radialshift');
let xpos = 0;
let ypos = 0;
if (elem.points) {
const list = elem.points;
const len = list.numberOfItems;
for (let i = 0; i < len; ++i) {
const pt = list.getItem(i);
xpos += parseFloat(pt.x);
ypos += parseFloat(pt.y);
}
const cx = xpos / len;
const cy = ypos / len;
const circumradius = Number(elem.getAttribute('r'));
const inradius = circumradius / elem.getAttribute('starRadiusMultiplier');
let polyPoints = "";
for (let s = 0; point >= s; s++) {
let angle = 2.0 * Math.PI * (s / point);
if (orient === "point") {
angle -= Math.PI / 2;
} else if (orient === "edge") {
angle = angle + Math.PI / point - Math.PI / 2;
}
let x = circumradius * Math.cos(angle) + cx;
let y = circumradius * Math.sin(angle) + cy;
polyPoints += x + "," + y + " ";
if (!isNaN(inradius)) {
angle = 2.0 * Math.PI * (s / point) + Math.PI / point;
if (orient === "point") {
angle -= Math.PI / 2;
} else if (orient === "edge") {
angle = angle + Math.PI / point - Math.PI / 2;
}
angle += radialshift;
x = inradius * Math.cos(angle) + cx;
y = inradius * Math.sin(angle) + cy;
polyPoints += x + "," + y + " ";
}
}
elem.setAttribute("points", polyPoints);
addToHistory(new ChangeElementCommand(elem, { 'point': oldPoint, 'points': oldPoints }));
}
}
}
});
$id("RadiusMultiplier").addEventListener("change", (event) => {
setAttr("starRadiusMultiplier", event.target.value);
});
$id("radialShift").addEventListener("change", (event) => {
setAttr("radialshift", event.target.value);
});
$id("polySides").addEventListener("change", (event) => {
setAttr("sides", event.target.value);
const sides = event.target.value;
let i = selElems.length;
while (i--) {
const elem = selElems[i];
if (elem.hasAttribute('edge')) {
const oldSides = elem.getAttribute('sides');
const oldPoints = elem.getAttribute('points');
let xpos = 0;
let ypos = 0;
if (elem.points) {
const list = elem.points;
const len = list.numberOfItems;
for (let i = 0; i < len; ++i) {
const pt = list.getItem(i);
xpos += parseFloat(pt.x);
ypos += parseFloat(pt.y);
}
const cx = xpos / len;
const cy = ypos / len;
const edg = elem.getAttribute('edge');
const inradius = (edg / 2) * cot(Math.PI / sides);
const circumradius = inradius * sec(Math.PI / sides);
let points = "";
for (let s = 0; sides >= s; s++) {
const angle = (2.0 * Math.PI * s) / sides;
const x = circumradius * Math.cos(angle) + cx;
const y = circumradius * Math.sin(angle) + cy;
points += x + "," + y + " ";
}
elem.setAttribute("points", points);
addToHistory(new ChangeElementCommand(elem, { 'sides': oldSides, 'points': oldPoints }));
}
}
}
});
},
mouseDown(opts) {
if (svgCanvas.getMode() === "star") {
const rgb = svgCanvas.getColor("fill");
const sRgb = svgCanvas.getColor("stroke");
const sWidth = svgCanvas.getStrokeWidth();
started = true;
newFO = svgCanvas.addSVGElementFromJson({
element: "polygon",
attr: {
cx: opts.start_x,
cy: opts.start_y,
id: svgCanvas.getNextId(),
shape: "star",
point: $id("starNumPoints").value,
r: 0,
radialshift: $id("radialShift").value,
r2: 0,
orient: "point",
fill: rgb,
strokecolor: sRgb,
strokeWidth: sWidth
}
});
return {
started: true
};
}
if (svgCanvas.getMode() === "polygon") {
// const e = opts.event;
const rgb = svgCanvas.getColor("fill");
// const ccRgbEl = rgb.substring(1, rgb.length);
const sRgb = svgCanvas.getColor("stroke");
// ccSRgbEl = sRgb.substring(1, rgb.length);
const sWidth = svgCanvas.getStrokeWidth();
started = true;
newFO = svgCanvas.addSVGElementFromJson({
element: "polygon",
attr: {
cx: opts.start_x,
cy: opts.start_y,
id: svgCanvas.getNextId(),
shape: "regularPoly",
sides: $id("polySides").value,
orient: "x",
edge: 0,
fill: rgb,
strokecolor: sRgb,
strokeWidth: sWidth
}
});
return {
started: true
};
}
return undefined;
},
mouseMove(opts) {
if (!started) {
return undefined;
}
if (svgCanvas.getMode() === "star") {
const cx = Number(newFO.getAttribute("cx"));
const cy = Number(newFO.getAttribute("cy"));
const point = Number(newFO.getAttribute("point"));
const orient = newFO.getAttribute("orient");
const fill = newFO.getAttribute("fill");
const strokecolor = newFO.getAttribute("strokecolor");
const strokeWidth = Number(newFO.getAttribute("strokeWidth"));
const radialshift = Number(newFO.getAttribute("radialshift"));
let x = opts.mouse_x;
let y = opts.mouse_y;
const circumradius =
Math.sqrt((x - cx) * (x - cx) + (y - cy) * (y - cy)) / 1.5;
const RadiusMultiplier = document.getElementById("RadiusMultiplier").value;
const inradius =
circumradius / RadiusMultiplier;
newFO.setAttribute("r", circumradius);
newFO.setAttribute("r2", inradius);
newFO.setAttribute('starRadiusMultiplier', RadiusMultiplier);
let polyPoints = "";
for (let s = 0; point >= s; s++) {
let angle = 2.0 * Math.PI * (s / point);
if (orient === "point") {
angle -= Math.PI / 2;
} else if (orient === "edge") {
angle = angle + Math.PI / point - Math.PI / 2;
}
x = circumradius * Math.cos(angle) + cx;
y = circumradius * Math.sin(angle) + cy;
polyPoints += x + "," + y + " ";
if (!isNaN(inradius)) {
angle = 2.0 * Math.PI * (s / point) + Math.PI / point;
if (orient === "point") {
angle -= Math.PI / 2;
} else if (orient === "edge") {
angle = angle + Math.PI / point - Math.PI / 2;
}
angle += radialshift;
x = inradius * Math.cos(angle) + cx;
y = inradius * Math.sin(angle) + cy;
polyPoints += x + "," + y + " ";
}
}
newFO.setAttribute("points", polyPoints);
newFO.setAttribute("fill", fill);
newFO.setAttribute("stroke", strokecolor);
newFO.setAttribute("stroke-width", strokeWidth);
/* const shape = */ newFO.getAttribute("shape");
return {
started: true
};
}
if (svgCanvas.getMode() === "polygon") {
const cx = Number(newFO.getAttribute("cx"));
const cy = Number(newFO.getAttribute("cy"));
const sides = Number(newFO.getAttribute("sides"));
// const orient = newFO.getAttribute('orient');
const fill = newFO.getAttribute("fill");
const strokecolor = newFO.getAttribute("strokecolor");
const strokeWidth = Number(newFO.getAttribute("strokeWidth"));
let x = opts.mouse_x;
let y = opts.mouse_y;
const edg =
Math.sqrt((x - cx) * (x - cx) + (y - cy) * (y - cy)) / 1.5;
newFO.setAttribute("edge", edg);
const inradius = (edg / 2) * cot(Math.PI / sides);
const circumradius = inradius * sec(Math.PI / sides);
let points = "";
for (let s = 0; sides >= s; s++) {
const angle = (2.0 * Math.PI * s) / sides;
x = circumradius * Math.cos(angle) + cx;
y = circumradius * Math.sin(angle) + cy;
points += x + "," + y + " ";
}
// const poly = newFO.createElementNS(NS.SVG, 'polygon');
newFO.setAttribute("points", points);
newFO.setAttribute("fill", fill);
newFO.setAttribute("stroke", strokecolor);
newFO.setAttribute("stroke-width", strokeWidth);
return {
started: true
};
}
return undefined;
},
mouseUp() {
if (svgCanvas.getMode() === "star") {
const r = newFO.getAttribute("r");
return {
keep: r !== "0",
element: newFO
};
}
if (svgCanvas.getMode() === "polygon") {
const edge = newFO.getAttribute("edge");
const keep = edge !== "0";
// svgCanvas.addToSelection([newFO], true);
return {
keep,
element: newFO
};
}
return undefined;
},
selectedChanged(opts) {
// Use this to update the current selected elements
selElems = opts.elems;
let i = selElems.length;
while (i--) {
const elem = selElems[i];
if (elem && elem.getAttribute("shape") === "star") {
if (opts.selectedElement && !opts.multiselected) {
$id("starNumPoints").value = elem.getAttribute("point");
$id("radialShift").value = elem.getAttribute("radialshift");
showPanel(true, "star");
} else {
showPanel(false, "star");
}
} else if (elem && elem.getAttribute("shape") === "regularPoly") {
if (opts.selectedElement && !opts.multiselected) {
$id("polySides").value = elem.getAttribute("sides");
showPanel(true, "polygon");
} else {
showPanel(false, "polygon");
}
} else {
showPanel(false, "star");
showPanel(false, "polygon");
}
}
}
};
}
};
</code></pre>
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href="module-svgcanvas.PrivateMethods.html">PrivateMethods</a></li><li><a href="module-SVGEditor.Config.html">Config</a></li><li><a href="module-SVGEditor.Prefs.html">Prefs</a></li><li><a href="module-SVGthis.CustomHandler.html">CustomHandler</a></li><li><a href="module-units.ElementContainer.html">ElementContainer</a></li><li><a href="module-utilities.EditorContext.html">EditorContext</a></li></ul><h3>Events</h3><ul><li><a href="module-history-Command.html#event:event:history">history</a></li><li><a href="module-svgcanvas.SvgCanvas.html#event:event:changed">changed</a></li><li><a href="module-svgcanvas.SvgCanvas.html#event:event:cleared">cleared</a></li><li><a href="module-svgcanvas.SvgCanvas.html#event:event:contextset">contextset</a></li><li><a href="module-svgcanvas.SvgCanvas.html#event:event:exported">exported</a></li><li><a href="module-svgcanvas.SvgCanvas.html#event:event:exportedPDF">exportedPDF</a></li><li><a href="module-svgcanvas.SvgCanvas.html#event:event:ext_addLangData">ext_addLangData</a></li><li><a href="module-svgcanvas.SvgCanvas.html#event:event:ext_callback">ext_callback</a></li><li><a href="module-svgcanvas.SvgCanvas.html#event:event:ext_canvasUpdated">ext_canvasUpdated</a></li><li><a href="module-svgcanvas.SvgCanvas.html#event:event:ext_elementChanged">ext_elementChanged</a></li><li><a href="module-svgcanvas.SvgCanvas.html#event:event:ext_elementTransition">ext_elementTransition</a></li><li><a href="module-svgcanvas.SvgCanvas.html#event:event:ext_IDsUpdated">ext_IDsUpdated</a></li><li><a href="module-svgcanvas.SvgCanvas.html#event:event:ext_langChanged">ext_langChanged</a></li><li><a href="module-svgcanvas.SvgCanvas.html#event:event:ext_langReady">ext_langReady</a></li><li><a href="module-svgcanvas.SvgCanvas.html#event:event:ext_mouseDown">ext_mouseDown</a></li><li><a href="module-svgcanvas.SvgCanvas.html#event:event:ext_mouseMove">ext_mouseMove</a></li><li><a href="module-svgcanvas.SvgCanvas.html#event:event:ext_mouseUp">ext_mouseUp</a></li><li><a href="module-svgcanvas.SvgCanvas.html#event:event:ext_onNewDocument">ext_onNewDocument</a></li><li><a href="module-svgcanvas.SvgCanvas.html#event:event:ext_selectedChanged">ext_selectedChanged</a></li><li><a href="module-svgcanvas.SvgCanvas.html#event:event:ext_toolButtonStateUpdate">ext_toolButtonStateUpdate</a></li><li><a href="module-svgcanvas.SvgCanvas.html#event:event:ext_workareaResized">ext_workareaResized</a></li><li><a href="module-svgcanvas.SvgCanvas.html#event:event:ext_zoomChanged">ext_zoomChanged</a></li><li><a href="module-svgcanvas.SvgCanvas.html#event:event:extension_added">extension_added</a></li><li><a href="module-svgcanvas.SvgCanvas.html#event:event:extensions_added">extensions_added</a></li><li><a href="module-svgcanvas.SvgCanvas.html#event:event:GenericCanvasEvent">GenericCanvasEvent</a></li><li><a href="module-svgcanvas.SvgCanvas.html#event:event:message">message</a></li><li><a href="module-svgcanvas.SvgCanvas.html#event:event:pointsAdded">pointsAdded</a></li><li><a href="module-svgcanvas.SvgCanvas.html#event:event:saved">saved</a></li><li><a href="module-svgcanvas.SvgCanvas.html#event:event:selected">selected</a></li><li><a href="module-svgcanvas.SvgCanvas.html#event:event:setnonce">setnonce</a></li><li><a href="module-svgcanvas.SvgCanvas.html#event:event:transition">transition</a></li><li><a href="module-svgcanvas.SvgCanvas.html#event:event:unsetnonce">unsetnonce</a></li><li><a href="module-svgcanvas.SvgCanvas.html#event:event:updateCanvas">updateCanvas</a></li><li><a href="module-svgcanvas.SvgCanvas.html#event:event:zoomDone">zoomDone</a></li><li><a href="module-svgcanvas.SvgCanvas.html#event:event:zoomed">zoomed</a></li><li><a href="module-SVGEditor.html#event:event:svgEditorReadyEvent">svgEditorReadyEvent</a></li></ul><h3>Tutorials</h3><ul><li><a href="tutorial-CanvasAPI.html">CanvasAPI</a></li><li><a href="tutorial-Editor.html">Editor</a></li><li><a href="tutorial-EditorAPI.html">EditorAPI</a></li><li><a href="tutorial-Events.html">Events</a></li><li><a href="tutorial-FrequentlyAskedQuestions.html">Frequently Asked Questions (FAQ)</a></li></ul><h3>Global</h3><ul><li><a href="global.html#attributeChangedCallback">attributeChangedCallback</a></li><li><a href="global.html#connectedCallback">connectedCallback</a></li><li><a href="global.html#constructor">constructor</a></li><li><a href="global.html#expireCookie">expireCookie</a></li><li><a href="global.html#findPos">findPos</a></li><li><a href="global.html#formatValueFormatthenumericvalueasastring.Thisisusedafterincrementing/decrementingthevaluetoreformatthevalueasastring.">formatValue
Format the numeric value as a string.
This is used after incrementing/decrementing the value to reformat the
value as a string.</a></li><li><a href="global.html#get">get</a></li><li><a href="global.html#getClosest">getClosest</a></li><li><a href="global.html#getParents">getParents</a></li><li><a href="global.html#init">init</a></li><li><a href="global.html#inputsize">inputsize</a></li><li><a href="global.html#isNullish">isNullish</a></li><li><a href="global.html#loadloadConfig">load load Config</a></li><li><a href="global.html#loadFromURLLoadconfig/datafromURLifgiven">loadFromURL Load config/data from URL if given</a></li><li><a href="global.html#name">name</a></li><li><a href="global.html#observedAttributes">observedAttributes</a></li><li><a href="global.html#parseValue">parseValue</a></li><li><a href="global.html#pref">pref</a></li><li><a href="global.html#processResults">processResults</a></li><li><a href="global.html#readySignal">readySignal</a></li><li><a href="global.html#regexEscape">regexEscape</a></li><li><a href="global.html#removeStoragePrefCookie">removeStoragePrefCookie</a></li><li><a href="global.html#replaceStoragePrompt">replaceStoragePrompt</a></li><li><a href="global.html#set">set</a></li><li><a href="global.html#setupCurConfig">setupCurConfig</a></li><li><a href="global.html#setupCurPrefs">setupCurPrefs</a></li><li><a href="global.html#src">src</a></li><li><a href="global.html#stateEffects">stateEffects</a></li><li><a href="global.html#stepDown">stepDown</a></li><li><a href="global.html#stepUp">stepUp</a></li><li><a href="global.html#touchHandler">touchHandler</a></li><li><a href="global.html#updateLib">updateLib</a></li><li><a href="global.html#value">value</a></li></ul>
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