44 lines
1.4 KiB
JavaScript
44 lines
1.4 KiB
JavaScript
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window.addEventListener('DOMContentLoaded', function() {
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var canvas = document.getElementById('draw_canvas');
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if (!canvas) {
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throw 'No <canvas> element found with id "draw_canvas"';
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}
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var scriptTags = document.getElementsByTagName('script');
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var paperScriptCodeFound = false;
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for(var i=0; i<scriptTags.length; i++) {
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var script = scriptTags[i];
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if (script.type == 'text/paperscript') {
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paperScriptCodeFound = true;
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}
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}
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if (!paperScriptCodeFound) {
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throw 'No paper script code found. Did you add type="text/paperscript" to your <script> tag?';
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}
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if (typeof(paper) == 'undefined') {
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throw 'No paper.js library found. Have you added proper script tag?';
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}
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})
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window.onerror = function(error, url, lineNumber) {
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//From http://sketch.paperjs.org/assets/js/editor.js
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var columNumber = 0, match;
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if (match = error.match(/(.*)\s*\((\d*):(\d*)\)/)) { // Acorn
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error = match[1];
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lineNumber = Number(match[2]);
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columNumber = match[3];
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} else if (match = error.match(/(.*)Line (\d*):\s*(.*)/i)) { // Esprima
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error = match[1] + match[3];
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lineNumber = Number(match[2]);
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}
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//Find paper script tag line number + 2 (html line and doctype line)
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var html = document.body.parentNode.innerHTML;
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var lines = html.split('\n');
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lines.forEach(function(line, lineIndex) {
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if (line.indexOf('paperscript') > 0) {
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console.log(error, 'at Line', lineIndex + lineNumber + 2);
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}
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})
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};
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