From 12b1c76fefc78b2a0fa54138a550c73802b1847d Mon Sep 17 00:00:00 2001
From: Neil Mitchell <http://www.cs.york.ac.uk/~ndm/>
Date: Thu, 11 Jan 2007 17:07:09 +0000
Subject: Add searching on the index page

---
 html/haddock-util.js         | 27 +++++++++++++++++++++++++++
 src/Haddock/Backends/Html.hs | 14 +++++++++++---
 2 files changed, 38 insertions(+), 3 deletions(-)

diff --git a/html/haddock-util.js b/html/haddock-util.js
index 4280d19c..fe471453 100644
--- a/html/haddock-util.js
+++ b/html/haddock-util.js
@@ -13,3 +13,30 @@ function toggle(button,id)
 	n.display = "none";
    }
 }
+
+
+function quick_search()
+{
+    perform_search(false);
+}
+
+function full_search()
+{
+    perform_search(true);
+}
+
+
+function perform_search(full)
+{
+    var text = document.getElementById("searchbox").value.toLowerCase();
+    var table = document.getElementById("indexlist");
+    var children = table.firstChild.childNodes;
+    for (var i = 0; i < children.length; i++)
+    {
+    	var c = children[i];
+    	var s = c.firstChild.firstChild.data;
+    	var show = s.toLowerCase().indexOf(text) != -1;
+    
+    	c.style.display = (show ? "" : "none");
+    }
+}
diff --git a/src/Haddock/Backends/Html.hs b/src/Haddock/Backends/Html.hs
index 36be7909..d46e0df4 100644
--- a/src/Haddock/Backends/Html.hs
+++ b/src/Haddock/Backends/Html.hs
@@ -413,11 +413,12 @@ ppHtmlIndex odir doctitle maybe_package maybe_html_help_format
   let html = 
 	header (documentCharacterEncoding +++
 		thetitle (toHtml (doctitle ++ " (Index)")) +++
-		styleSheet) +++
+        styleSheet +++
+        (script ! [src jsFile, thetype "text/javascript"] $ noHtml)) +++
         body << vanillaTable << (
 	    simpleHeader doctitle maybe_contents_url Nothing
                          maybe_source_url maybe_wiki_url </>
-	    index_html
+        search_box </> index_html
 	   )
 
   writeFile (pathJoin [odir, indexHtmlFile]) (renderHtml html)
@@ -430,7 +431,14 @@ ppHtmlIndex odir doctitle maybe_package maybe_html_help_format
     Just "devhelp" -> return ()
     Just format    -> fail ("The "++format++" format is not implemented")
  where
-  index_html = td << table ! [cellpadding 0, cellspacing 5] <<
+  -- colspan 2, marginheight 5
+  search_box :: HtmlTable
+  search_box = tda [colspan 2, thestyle "padding-top:5px;"] << search
+    where
+      search :: Html
+      search = "Search: " +++ input ! [identifier "searchbox", strAttr "onkeyup" "quick_search()"] +++ " " +++ input ! [value "Search", thetype "button", onclick "full_search()"]
+ 
+  index_html = td << table ! [identifier "indexlist", cellpadding 0, cellspacing 5] <<
 	  aboves (map indexElt index) 
  	
   indexInitialLetterLinks = 
-- 
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