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Bug 951435 - Add exponential option to histogram bar graph; r=vladan

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This commit is contained in:
Jim Chen 2014-01-14 23:39:16 -06:00
parent d5c8b685d3
commit 8da93e55b1
1 changed files with 24 additions and 5 deletions
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29
toolkit/content/aboutTelemetry.js
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@ -426,9 +426,12 @@ let Histogram = {
* @param aParent Parent element
* @param aName Histogram name
* @param aHgram Histogram information
* @param aOptions Object with render options
* * exponential: bars follow logarithmic scale
*/
render: function Histogram_render(aParent, aName, aHgram) {
render: function Histogram_render(aParent, aName, aHgram, aOptions) {
let hgram = this.unpack(aHgram);
let options = aOptions || {};
let outerDiv = document.createElement("div");
outerDiv.className = "histogram";
@ -450,7 +453,8 @@ let Histogram = {
if (isRTL())
hgram.values.reverse();
let textData = this.renderValues(outerDiv, hgram.values, hgram.max, hgram.sample_count);
let textData = this.renderValues(outerDiv, hgram.values, hgram.max,
hgram.sample_count, options);
// The 'Copy' button contains the textual data, copied to clipboard on click
let copyButton = document.createElement("button");
@ -514,6 +518,16 @@ let Histogram = {
return result;
},
/**
* Return a non-negative, logarithmic representation of a non-negative number.
* e.g. 0 => 0, 1 => 1, 10 => 2, 100 => 3
*
* @param aNumber Non-negative number
*/
getLogValue: function(aNumber) {
return Math.max(0, Math.log10(aNumber) + 1);
},
/**
* Create histogram HTML bars, also returns a textual representation
* Both aMaxValue and aSumValues must be positive.
@ -523,21 +537,26 @@ let Histogram = {
* @param aValues Histogram values
* @param aMaxValue Value of the longest bar (length, not label)
* @param aSumValues Sum of all bar values
* @param aOptions Object with render options (@see #render)
*/
renderValues: function Histogram_renderValues(aDiv, aValues, aMaxValue, aSumValues) {
renderValues: function Histogram_renderValues(aDiv, aValues, aMaxValue, aSumValues, aOptions) {
let text = "";
// If the last label is not the longest string, alignment will break a little
let labelPadTo = String(aValues[aValues.length -1][0]).length;
let maxBarValue = aOptions.exponential ? this.getLogValue(aMaxValue) : aMaxValue;
for (let [label, value] of aValues) {
let barValue = aOptions.exponential ? this.getLogValue(value) : value;
// Create a text representation: <right-aligned-label> |<bar-of-#><value> <percentage>
text += EOL
+ " ".repeat(Math.max(0, labelPadTo - String(label).length)) + label // Right-aligned label
+ " |" + "#".repeat(Math.round(MAX_BAR_CHARS * value / aMaxValue)) + value // Bars and value
+ " |" + "#".repeat(Math.round(MAX_BAR_CHARS * barValue / maxBarValue)) // Bar
+ " " + value // Value
+ " " + Math.round(100 * value / aSumValues) + "%"; // Percentage
// Construct the HTML labels + bars
let belowEm = Math.round(MAX_BAR_HEIGHT * (value / aMaxValue) * 10) / 10;
let belowEm = Math.round(MAX_BAR_HEIGHT * (barValue / maxBarValue) * 10) / 10;
let aboveEm = MAX_BAR_HEIGHT - belowEm;
let barDiv = document.createElement("div");