112 lines
No EOL
3.7 KiB
JavaScript
112 lines
No EOL
3.7 KiB
JavaScript
/* $This file is distributed under the terms of the license in /doc/license.txt$ */
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/**
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* For rendering images dynamically.
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*
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*/
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$.fn.image = function(src, successFunc, failureFunc){
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return this.each(function(){
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var profileImage = new Image();
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profileImage.onerror = failureFunc;
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profileImage.onload = successFunc;
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profileImage.src = src;
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return profileImage;
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});
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};
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/**
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* Function by Google Charts API Team to do "extended encode" of data.
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*/
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function extendedEncodeDataForChartURL(arrVals, maxVal) {
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var EXTENDED_MAP = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789-.';
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var EXTENDED_MAP_LENGTH = EXTENDED_MAP.length;
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var chartData = 'e:';
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for (i = 0, len = arrVals.length; i < len; i++) {
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// In case the array vals were translated to strings.
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var numericVal = new Number(arrVals[i]);
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// Scale the value to maxVal.
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var scaledVal = Math.floor(EXTENDED_MAP_LENGTH * EXTENDED_MAP_LENGTH * numericVal / maxVal);
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if (scaledVal > (EXTENDED_MAP_LENGTH * EXTENDED_MAP_LENGTH) - 1) {
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chartData += "..";
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} else if (scaledVal < 0) {
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chartData += '__';
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} else {
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// Calculate first and second digits and add them to the output.
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var quotient = Math.floor(scaledVal / EXTENDED_MAP_LENGTH);
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var remainder = scaledVal - EXTENDED_MAP_LENGTH * quotient;
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chartData += EXTENDED_MAP.charAt(quotient) + EXTENDED_MAP.charAt(remainder);
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}
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}
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return chartData;
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}
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/**
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* This will be used for getting images directly from the secure https://charts.googleapis.com
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* instead of http://charts.apis.google.com which currently throws security warnings.
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*
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* see http://code.google.com/apis/chart/docs/chart_params.html FOR chart parameters
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* see http://code.google.com/apis/chart/docs/data_formats.html FOR how to encode data
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*
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* sample constructed URL - https://chart.googleapis.com/chart?cht=ls&chs=148x58&chdlp=r&chco=3399CC&chd=e%3AW2ttpJbb..ttgAbbNtAA
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*/
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function constructVisualizationURLForSparkline(dataString, visualizationOptions) {
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/*
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* Since we are directly going to use this URL in img tag, we are supposed to enocde "&"
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* update: But since we are directly using it in an Image creating function we dont need to encode it.
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*/
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//var parameterDifferentiator = "&";
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var parameterDifferentiator = "&";
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var rootGoogleChartAPI_URL = "https://chart.googleapis.com/chart?";
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/*
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* cht=ls indicates chart of type "line chart sparklines".
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* see http://code.google.com/apis/chart/docs/gallery/chart_gall.html
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*/
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var chartType = "cht=" + visualizationOptions.chartType;
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/*
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* It seems google reduces 2px from width & height before rendering the actual image.
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* We will do the same.
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*/
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var chartSize = "chs=" + (visualizationOptions.width - 2) + "x" + (visualizationOptions.height - 2);
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/*
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* It means that legend, if present, is to be displayed to the right of the chart,
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* legend entries in a vertical column.
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*/
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var chartLabelPosition = "chdlp=" + visualizationOptions.chartLabel;
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/*
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* Color of the sparkline.
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*/
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var chartColor = "chco=" + visualizationOptions.color;
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return rootGoogleChartAPI_URL + chartType + parameterDifferentiator
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+ chartSize + parameterDifferentiator
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+ chartLabelPosition + parameterDifferentiator
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+ chartColor + parameterDifferentiator
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+ "chd=" + dataString
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}
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/*
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* In IE trim() is not supported.
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* */
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if (typeof String.prototype.trim !== 'function') {
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String.prototype.trim = function() {
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return this.replace(/^\s+|\s+$/g, '');
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}
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}
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function toTitleCase(str) {
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return str.replace(/\w\S*/g, function(txt) {
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return txt.charAt(0).toUpperCase() + txt.substr(1).toLowerCase();
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});
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} |