# HG changeset patch
# User Alexander Plavin <me@aplavin.ru>
# Date 1373630293 -14400
# Node ID 5ec5097b4c0fa4b52440e3cdae2650cf2381a842
# Parent  c8490dcc5fb3c0da8fe713c07533471752550a7d
hgweb: add line wrapping switch to file source view

This uses classList property, which is well-supported now: both Chromium 8.0+,
Firefox 3.6+ and Opera 11.5+ support it, as well as relatively modern versions
of other browsers.

diff -r c8490dcc5fb3 -r 5ec5097b4c0f mercurial/templates/paper/filerevision.tmpl
--- a/mercurial/templates/paper/filerevision.tmpl	Tue Jul 09 02:08:24 2013 +0400
+++ b/mercurial/templates/paper/filerevision.tmpl	Fri Jul 12 15:58:13 2013 +0400
@@ -67,8 +67,9 @@
 </table>
 
 <div class="overflow">
+<div class="sourcefirst linewraptoggle">line wrap: <a class="linewraplink" href="javascript:toggleLinewrap()">on</a></div>
 <div class="sourcefirst"> line source</div>
-<pre class="sourcelines">{text%fileline}</pre>
+<pre class="sourcelines wrap">{text%fileline}</pre>
 <div class="sourcelast"></div>
 </div>
 </div>
diff -r c8490dcc5fb3 -r 5ec5097b4c0f mercurial/templates/static/mercurial.js
--- a/mercurial/templates/static/mercurial.js	Tue Jul 09 02:08:24 2013 +0400
+++ b/mercurial/templates/static/mercurial.js	Fri Jul 12 15:58:13 2013 +0400
@@ -271,3 +271,29 @@
     document.getElementById('diffstatdetails').style.display = curexpand;
     document.getElementById('diffstatexpand').style.display = curdetails;
 }
+
+function toggleLinewrap() {
+    function getLinewrap() {
+        var nodes = document.getElementsByClassName('sourcelines');
+        // if there are no such nodes, error is thrown here
+        return nodes[0].classList.contains('wrap');
+    }
+
+    function setLinewrap(enable) {
+        var nodes = document.getElementsByClassName('sourcelines');
+        for (var i = 0; i < nodes.length; i++) {
+            if (enable) {
+                nodes[i].classList.add('wrap');
+            } else {
+                nodes[i].classList.remove('wrap');
+            }
+        }
+
+        var links = document.getElementsByClassName('linewraplink');
+        for (var i = 0; i < links.length; i++) {
+            links[i].innerHTML = enable ? 'on' : 'off';
+        }
+    }
+
+    setLinewrap(!getLinewrap());
+}
diff -r c8490dcc5fb3 -r 5ec5097b4c0f mercurial/templates/static/style-paper.css
--- a/mercurial/templates/static/style-paper.css	Tue Jul 09 02:08:24 2013 +0400
+++ b/mercurial/templates/static/style-paper.css	Fri Jul 12 15:58:13 2013 +0400
@@ -214,11 +214,18 @@
   position: relative;
 }
 
+.wrap > span {
+    white-space: pre-wrap;
+}
+
+.linewraptoggle {
+    float: right;
+}
+
 .sourcelines > span {
   display: inline-block;
   width: 100%;
   padding: 1px 0px;
-  white-space: pre-wrap;
   counter-increment: lineno;
 }
 
diff -r c8490dcc5fb3 -r 5ec5097b4c0f tests/test-hgweb-commands.t
--- a/tests/test-hgweb-commands.t	Tue Jul 09 02:08:24 2013 +0400
+++ b/tests/test-hgweb-commands.t	Fri Jul 12 15:58:13 2013 +0400
@@ -667,8 +667,9 @@
   </table>
   
   <div class="overflow">
+  <div class="sourcefirst linewraptoggle">line wrap: <a class="linewraplink" href="javascript:toggleLinewrap()">on</a></div>
   <div class="sourcefirst"> line source</div>
-  <pre class="sourcelines">
+  <pre class="sourcelines wrap">
   <span id="l1">foo</span><a href="#l1"></a></pre>
   <div class="sourcelast"></div>
   </div>
diff -r c8490dcc5fb3 -r 5ec5097b4c0f tests/test-highlight.t
--- a/tests/test-highlight.t	Tue Jul 09 02:08:24 2013 +0400
+++ b/tests/test-highlight.t	Fri Jul 12 15:58:13 2013 +0400
@@ -136,8 +136,9 @@
   </table>
   
   <div class="overflow">
+  <div class="sourcefirst linewraptoggle">line wrap: <a class="linewraplink" href="javascript:toggleLinewrap()">on</a></div>
   <div class="sourcefirst"> line source</div>
-  <pre class="sourcelines">
+  <pre class="sourcelines wrap">
   <span id="l1"><span class="c">#!/usr/bin/env python</span></span><a href="#l1"></a>
   <span id="l2"></span><a href="#l2"></a>
   <span id="l3"><span class="sd">&quot;&quot;&quot;Fun with generators. Corresponding Haskell implementation:</span></span><a href="#l3"></a>