perf: make the context shortcodes even shorter

On the coverage.py metacov, this makes the HTML 5% smaller.

1 files changed, 17 insertions, 17 deletions

diff --git a/coverage/htmlfiles/coverage_html.js b/coverage/htmlfiles/coverage_html.js
index 691a56c3..4c321182 100644
--- a/coverage/htmlfiles/coverage_html.js
+++ b/coverage/htmlfiles/coverage_html.js
@@ -212,11 +212,6 @@ coverage.index_ready = function () {
 coverage.LINE_FILTERS_STORAGE = "COVERAGE_LINE_FILTERS";
 
 coverage.pyfile_ready = function () {
-    cboxes = document.querySelectorAll('[id^=ctxs]')
-    cboxes.forEach(function(cbox) {
-        cbox.addEventListener("click", coverage.showContexts)
-    });
-
     // If we're directed to a particular line number, highlight the line.
     var frag = location.hash;
     if (frag.length > 2 && frag[1] === "t") {
@@ -262,6 +257,10 @@ coverage.pyfile_ready = function () {
     coverage.init_scroll_markers();
     coverage.wire_up_sticky_header();
 
+    document.querySelectorAll("[id^=ctxs]").forEach(
+        cbox => cbox.addEventListener("click", coverage.expand_contexts)
+    );
+
     // Rebuild scroll markers when the window height changes.
     window.addEventListener("resize", coverage.build_scroll_markers);
 };
@@ -600,17 +599,19 @@ coverage.wire_up_sticky_header = function () {
     updateHeader();
 };
 
-coverage.showContexts = function (e) {
-    span = e.target.nextElementSibling.nextElementSibling;
-    span_text = span.textContent;
-
-    if (/^[0-9,]+$/.test(span_text)) {
-        span.textContent = "";
-        span_text.split(",").forEach(function(s) {
-            ctx = contexts[s];
-            span.appendChild(document.createTextNode(ctx));
-            span.appendChild(document.createElement("br"));
-        })
+coverage.expand_contexts = function (e) {
+    var ctxs = e.target.parentNode.querySelector(".ctxs");
+
+    if (!ctxs.classList.contains("expanded")) {
+        var ctxs_text = ctxs.textContent;
+        var width = Number(ctxs_text[0]);
+        ctxs.textContent = "";
+        for (var i = 1; i < ctxs_text.length; i += width) {
+            key = ctxs_text.substring(i, i + width).trim();
+            ctxs.appendChild(document.createTextNode(contexts[key]));
+            ctxs.appendChild(document.createElement("br"));
+        }
+        ctxs.classList.add("expanded");
     }
 };
 
@@ -620,5 +621,4 @@ document.addEventListener("DOMContentLoaded", () => {
     } else {
         coverage.pyfile_ready();
     }
-
 });