From 36912a581525bdf6931019990b9fe73c70839d88 Mon Sep 17 00:00:00 2001
From: Yoshiki Shibukawa <yoshiki@shibu.jp>
Date: Tue, 3 Oct 2017 23:47:00 +0900
Subject: [PATCH] fix: #4108 - Search word highlight breaks SVG

---
 CHANGES                                  |  1 +
 sphinx/themes/basic/static/basic.css_t   |  6 ++-
 sphinx/themes/basic/static/doctools.js_t | 52 +++++++++++++++++-------
 3 files changed, 44 insertions(+), 15 deletions(-)

diff --git a/CHANGES b/CHANGES
index d90b29cb7..0d5eecd2d 100644
--- a/CHANGES
+++ b/CHANGES
@@ -23,6 +23,7 @@ Bugs fixed
 * #3987: Changing theme from alabaster causes HTML build to fail
 * #4096: C++, don't crash when using the wrong role type. Thanks to mitya57.
 * #4070, #4111: crashes when the warning message contains format strings (again)
+* #4108: Search word highlighting breaks SVG images
 
 Testing
 --------
diff --git a/sphinx/themes/basic/static/basic.css_t b/sphinx/themes/basic/static/basic.css_t
index 1cbc649f9..d16c760cb 100644
--- a/sphinx/themes/basic/static/basic.css_t
+++ b/sphinx/themes/basic/static/basic.css_t
@@ -445,10 +445,14 @@ dd {
     margin-left: 30px;
 }
 
-dt:target, .highlighted {
+dt:target, span.highlighted {
     background-color: #fbe54e;
 }
 
+rect.highlighted {
+    fill: #fbe54e;
+}
+
 dl.glossary dt {
     font-weight: bold;
     font-size: 1.1em;
diff --git a/sphinx/themes/basic/static/doctools.js_t b/sphinx/themes/basic/static/doctools.js_t
index 41830e44f..9ceecef79 100644
--- a/sphinx/themes/basic/static/doctools.js_t
+++ b/sphinx/themes/basic/static/doctools.js_t
@@ -45,7 +45,7 @@ jQuery.urlencode = encodeURIComponent;
  * it will always return arrays of strings for the value parts.
  */
 jQuery.getQueryParameters = function(s) {
-  if (typeof s == 'undefined')
+  if (typeof s === 'undefined')
     s = document.location.search;
   var parts = s.substr(s.indexOf('?') + 1).split('&');
   var result = {};
@@ -66,29 +66,53 @@ jQuery.getQueryParameters = function(s) {
  * span elements with the given class name.
  */
 jQuery.fn.highlightText = function(text, className) {
-  function highlight(node) {
-    if (node.nodeType == 3) {
+  function highlight(node, addItems) {
+    if (node.nodeType === 3) {
       var val = node.nodeValue;
       var pos = val.toLowerCase().indexOf(text);
       if (pos >= 0 && !jQuery(node.parentNode).hasClass(className)) {
-        var span = document.createElement("span");
-        span.className = className;
+        var span;
+        var isInSVG = jQuery(node).closest("body, svg, foreignObject").is("svg");
+        if (isInSVG) {
+          span = document.createElementNS("http://www.w3.org/2000/svg", "tspan");
+        } else {
+          span = document.createElement("span");
+          span.className = className;
+        }
         span.appendChild(document.createTextNode(val.substr(pos, text.length)));
         node.parentNode.insertBefore(span, node.parentNode.insertBefore(
           document.createTextNode(val.substr(pos + text.length)),
           node.nextSibling));
         node.nodeValue = val.substr(0, pos);
+        if (isInSVG) {
+          var bbox = span.getBBox();
+          var rect = document.createElementNS("http://www.w3.org/2000/svg", "rect");
+       	  rect.x.baseVal.value = bbox.x;
+          rect.y.baseVal.value = bbox.y;
+          rect.width.baseVal.value = bbox.width;
+          rect.height.baseVal.value = bbox.height;
+          rect.setAttribute('class', className);
+          var parentOfText = node.parentNode.parentNode;
+          addItems.push({
+              "parent": node.parentNode,
+              "target": rect});
+        }
       }
     }
     else if (!jQuery(node).is("button, select, textarea")) {
       jQuery.each(node.childNodes, function() {
-        highlight(this);
+        highlight(this, addItems);
       });
     }
   }
-  return this.each(function() {
-    highlight(this);
+  var addItems = [];
+  var result = this.each(function() {
+    highlight(this, addItems);
   });
+  for (var i = 0; i < addItems.length; ++i) {
+    jQuery(addItems[i].parent).before(addItems[i].target);
+  }
+  return result;
 };
 
 /*
@@ -133,21 +157,21 @@ var Documentation = {
    * i18n support
    */
   TRANSLATIONS : {},
-  PLURAL_EXPR : function(n) { return n == 1 ? 0 : 1; },
+  PLURAL_EXPR : function(n) { return n === 1 ? 0 : 1; },
   LOCALE : 'unknown',
 
   // gettext and ngettext don't access this so that the functions
   // can safely bound to a different name (_ = Documentation.gettext)
   gettext : function(string) {
     var translated = Documentation.TRANSLATIONS[string];
-    if (typeof translated == 'undefined')
+    if (typeof translated === 'undefined')
       return string;
-    return (typeof translated == 'string') ? translated : translated[0];
+    return (typeof translated === 'string') ? translated : translated[0];
   },
 
   ngettext : function(singular, plural, n) {
     var translated = Documentation.TRANSLATIONS[singular];
-    if (typeof translated == 'undefined')
+    if (typeof translated === 'undefined')
       return (n == 1) ? singular : plural;
     return translated[Documentation.PLURALEXPR(n)];
   },
@@ -218,7 +242,7 @@ var Documentation = {
       var src = $(this).attr('src');
       var idnum = $(this).attr('id').substr(7);
       $('tr.cg-' + idnum).toggle();
-      if (src.substr(-9) == 'minus.png')
+      if (src.substr(-9) === 'minus.png')
         $(this).attr('src', src.substr(0, src.length-9) + 'plus.png');
       else
         $(this).attr('src', src.substr(0, src.length-8) + 'minus.png');
@@ -250,7 +274,7 @@ var Documentation = {
     var path = document.location.pathname;
     var parts = path.split(/\//);
     $.each(DOCUMENTATION_OPTIONS.URL_ROOT.split(/\//), function() {
-      if (this == '..')
+      if (this === '..')
         parts.pop();
     });
     var url = parts.join('/');