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/* global HTMLImageElement */ |
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/* global HTMLCanvasElement */ |
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/* global SVGElement */ |
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import getOptionsFromElement from "./getOptionsFromElement.js"; |
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// Takes an element and returns an object with information about how |
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// it should be rendered |
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// This could also return an array with these objects |
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// { |
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// element: The element that the renderer should draw on |
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// renderer: The name of the renderer |
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// afterRender (optional): If something has to done after the renderer |
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// completed, calls afterRender (function) |
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// options (optional): Options that can be defined in the element |
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// } |
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function getRenderProperties(element){ |
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// If the element is a string, query select call again |
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if(typeof element === "string"){ |
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var selector = document.querySelectorAll(element); |
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if(selector.length === 0){ |
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throw new Error("No element found"); |
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} |
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else{ |
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let returnArray = []; |
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for(let i = 0; i < selector.length; i++){ |
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returnArray.push(getRenderProperties(selector[i])); |
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} |
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return returnArray; |
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} |
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} |
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// If element is array. Recursivly call with every object in the array |
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else if(Array.isArray(element)){ |
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let returnArray = []; |
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for(let i = 0; i < element.length; i++){ |
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returnArray.push(getRenderProperties(element[i])); |
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} |
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return returnArray; |
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} |
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// If element, render on canvas and set the uri as src |
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else if(typeof HTMLCanvasElement !== 'undefined' && element instanceof HTMLImageElement){ |
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var canvas = document.createElement('canvas'); |
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return { |
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element: canvas, |
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options: getOptionsFromElement(element), |
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renderer: "canvas", |
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afterRender: function(){ |
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element.setAttribute("src", canvas.toDataURL()); |
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} |
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}; |
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} |
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// If SVG |
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else if(typeof SVGElement !== 'undefined' && element instanceof SVGElement){ |
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return { |
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element: element, |
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options: getOptionsFromElement(element), |
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renderer: "svg" |
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}; |
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} |
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// If canvas (in browser) |
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else if(typeof HTMLCanvasElement !== 'undefined' && element instanceof HTMLCanvasElement){ |
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return { |
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element: element, |
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options: getOptionsFromElement(element), |
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renderer: "canvas" |
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}; |
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} |
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// If canvas (in node) |
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else if(element.getContext){ |
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return { |
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element: element, |
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renderer: "canvas" |
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}; |
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} |
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else{ |
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throw new Error("Not supported type to render on."); |
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} |
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} |
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export default getRenderProperties; |
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lindell /
JsBarcode
