Adds a taglist view with edit/delete buttons

* The tag list can be sort alphabetically or by most used tag
  * Edit/Delete are perform using AJAX, or fallback to 'do=changetag' page
  * New features aren't backported to vintage theme

tpl/default/changetag.html

@@ -11,7 +11,7 @@
     <h2 class="window-title">{"Manage tags"|t}</h2>
     <form method="POST" action="#" name="changetag" id="changetag">
       <div>
-        <input type="text" name="fromtag" placeholder="{'Tag'|t}"
+        <input type="text" name="fromtag" placeholder="{'Tag'|t}" value="{$fromtag}"
                list="tagsList" autocomplete="off" class="awesomplete autofocus" data-minChars="1">
         <datalist id="tagsList">
           {loop="$tags"}<option>{$key}</option>{/loop}
@@ -31,6 +31,8 @@
         <input type="submit" value="{'Delete'|t}" name="deletetag" class="button button-red confirm-delete">
       </div>
     </form>
+
+    <p>You can also edit tags in the <a href="?do=taglist&sort=usage">tag list</a>.</p>
   </div>
 </div>
 {include="page.footer"}

tpl/default/css/shaarli.css

@@ -751,10 +751,11 @@ body, .pure-g [class*="pure-u"] {
 .page-form a {
     color: #1b926c;
     font-weight: bold;
+    text-decoration: none;
 }
 
 .page-form p {
-    padding: 0 10px;
+    padding: 5px 10px;
     margin: 0;
 }
 
@@ -1070,7 +1071,7 @@ form[name="linkform"].page-form {
 }
 
 #cloudtag, #cloudtag a {
-    color: #000;
+    color: #252525;
     text-decoration: none;
 }
 
@@ -1078,6 +1079,38 @@ form[name="linkform"].page-form {
     color: #7f7f7f;
 }
 
+/**
+ * TAG LIST
+ */
+#taglist {
+    padding: 0 10px;
+}
+
+#taglist a {
+    color: #252525;
+    text-decoration: none;
+}
+
+#taglist .count {
+    display: inline-block;
+    width: 35px;
+    text-align: right;
+    color: #7f7f7f;
+}
+
+#taglist .delete-tag {
+    color: #ac2925;
+    display: none;
+}
+
+#taglist .rename-tag {
+    color: #0b5ea6;
+}
+
+#taglist .validate-rename-tag {
+    color: #1b926c;
+}
+
 /**
  * Picture wall CSS
  */
@@ -1227,3 +1260,16 @@ form[name="linkform"].page-form {
 .pure-button {
     -moz-user-select: auto;
 }
+
+.tag-sort {
+    margin-top: 30px;
+    text-align: center;
+}
+
+.tag-sort a {
+    display: inline-block;
+    margin: 0 15px;
+    color: white;
+    text-decoration: none;
+    font-weight: bold;
+}

tpl/default/js/shaarli.js

@@ -412,8 +412,139 @@ window.onload = function () {
             }
         });
     }
+
+    /**
+     * Tag list operations
+     *
+     * TODO: support error code in the backend for AJAX requests
+     */
+    // Display/Hide rename form
+    var renameTagButtons = document.querySelectorAll('.rename-tag');
+    [].forEach.call(renameTagButtons, function(rename) {
+        rename.addEventListener('click', function(event) {
+            event.preventDefault();
+            var block = findParent(event.target, 'div', {'class': 'tag-list-item'});
+            var form = block.querySelector('.rename-tag-form');
+            form.style.display = form.style.display == 'none' ? 'block' : 'none';
+        });
+    });
+
+    // Rename a tag with an AJAX request
+    var renameTagSubmits = document.querySelectorAll('.validate-rename-tag');
+    [].forEach.call(renameTagSubmits, function(rename) {
+        rename.addEventListener('click', function(event) {
+            event.preventDefault();
+            var block = findParent(event.target, 'div', {'class': 'tag-list-item'});
+            var input = block.querySelector('.rename-tag-input');
+            var totag = input.value.replace('/"/g', '\\"');
+            if (totag.trim() == '') {
+                return;
+            }
+            var fromtag = block.getAttribute('data-tag');
+            var token = document.getElementById('token').value;
+
+            xhr = new XMLHttpRequest();
+            xhr.open('POST', '?do=changetag');
+            xhr.setRequestHeader('Content-Type', 'application/x-www-form-urlencoded');
+            xhr.onload = function() {
+                if (xhr.status !== 200) {
+                    alert('An error occurred. Return code: '+ xhr.status);
+                    location.reload();
+                } else {
+                    block.setAttribute('data-tag', totag);
+                    input.setAttribute('name', totag);
+                    input.setAttribute('value', totag);
+                    input.parentNode.style.display = 'none';
+                    block.querySelector('a.tag-link').innerHTML = htmlEntities(totag);
+                    block.querySelector('a.tag-link').setAttribute('href', '?searchtags='+ encodeURIComponent(totag));
+                    block.querySelector('a.rename-tag').setAttribute('href', '?do=changetag&fromtag='+ encodeURIComponent(totag));
+                }
+            };
+            xhr.send('renametag=1&fromtag='+ encodeURIComponent(fromtag) +'&totag='+ encodeURIComponent(totag) +'&token='+ token);
+            refreshToken();
+        });
+    });
+
+    // Validate input with enter key
+    var renameTagInputs = document.querySelectorAll('.rename-tag-input');
+    [].forEach.call(renameTagInputs, function(rename) {
+        rename.addEventListener('keypress', function(event) {
+            if (event.keyCode === 13) { // enter
+                findParent(event.target, 'div', {'class': 'tag-list-item'}).querySelector('.validate-rename-tag').click();
+            }
+        });
+    });
+
+    // Delete a tag with an AJAX query (alert popup confirmation)
+    var deleteTagButtons = document.querySelectorAll('.delete-tag');
+    [].forEach.call(deleteTagButtons, function(rename) {
+        rename.style.display = 'inline';
+        rename.addEventListener('click', function(event) {
+            event.preventDefault();
+            var block = findParent(event.target, 'div', {'class': 'tag-list-item'});
+            var tag = block.getAttribute('data-tag');
+            var token = document.getElementById('token').value;
+
+            if (confirm('Are you sure you want to delete the tag "'+ tag +'"?')) {
+                xhr = new XMLHttpRequest();
+                xhr.open('POST', '?do=changetag');
+                xhr.setRequestHeader('Content-Type', 'application/x-www-form-urlencoded');
+                xhr.onload = function() {
+                    block.remove();
+                };
+                xhr.send(encodeURI('deletetag=1&fromtag='+ tag +'&token='+ token));
+                refreshToken();
+            }
+        });
+    });
 };
 
+function findParent(element, tagName, attributes)
+{
+    while (element) {
+        if (element.tagName.toLowerCase() == tagName) {
+            var match = true;
+            for (var key in attributes) {
+                if (! element.hasAttribute(key)
+                    || (attributes[key] != '' && element.getAttribute(key).indexOf(attributes[key]) == -1)
+                ) {
+                    match = false;
+                    break;
+                }
+            }
+
+            if (match) {
+                return element;
+            }
+        }
+        element = element.parentElement;
+    }
+    return null;
+}
+
+function refreshToken()
+{
+    var xhr = new XMLHttpRequest();
+    xhr.open('GET', '?do=token');
+    xhr.onload = function() {
+        var token = document.getElementById('token');
+        token.setAttribute('value', xhr.responseText);
+    };
+    xhr.send();
+}
+
+/**
+ * html_entities in JS
+ *
+ * @see http://stackoverflow.com/questions/18749591/encode-html-entities-in-javascript
+ */
+function htmlEntities(str)
+{
+    return str.replace(/[\u00A0-\u9999<>\&]/gim, function(i) {
+        return '&#'+i.charCodeAt(0)+';';
+    });
+}
+
 function activateFirefoxSocial(node) {
     var loc = location.href;
     var baseURL = loc.substring(0, loc.lastIndexOf("/"));
@@ -445,8 +576,11 @@ function activateFirefoxSocial(node) {
  * @param currentContinent Current selected continent
  * @param reset            Set to true to reset the selected value
  */
-function hideTimezoneCities(cities, currentContinent, reset = false) {
+function hideTimezoneCities(cities, currentContinent) {
     var first = true;
+    if (reset == null) {
+        reset = false;
+    }
     [].forEach.call(cities, function (option) {
         if (option.getAttribute('data-continent') != currentContinent) {
             option.className = 'hidden';

tpl/default/tag.list.html

@@ -0,0 +1,82 @@
+<!DOCTYPE html>
+<html>
+<head>
+  {include="includes"}
+</head>
+<body>
+{include="page.header"}
+
+{include="tag.sort"}
+
+<div class="pure-g">
+  <div class="pure-u-lg-1-6 pure-u-1-24"></div>
+  <div class="pure-u-lg-2-3 pure-u-22-24 page-form page-visitor">
+    {$countTags=count($tags)}
+    <h2 class="window-title">{'Tag list'|t} - {$countTags} {'tags'|t}</h2>
+
+    <div id="search-tagcloud" class="pure-g">
+      <div class="pure-u-lg-1-4"></div>
+      <div class="pure-u-1 pure-u-lg-1-2">
+        <form method="GET">
+          <input type="hidden" name="do" value="taglist">
+          <input type="text" name="searchtags" placeholder="{'Filter by tag'|t}"
+                 {if="!empty($search_tags)"}
+                 value="{$search_tags}"
+                 {/if}
+          autocomplete="off" data-multiple data-autofirst data-minChars="1"
+          data-list="{loop="$tags"}{$key}, {/loop}"
+          >
+          <button type="submit" class="search-button"><i class="fa fa-search"></i></button>
+        </form>
+      </div>
+      <div class="pure-u-lg-1-4"></div>
+    </div>
+
+    <div id="plugin_zone_start_tagcloud" class="plugin_zone">
+      {loop="$plugin_start_zone"}
+        {$value}
+      {/loop}
+    </div>
+
+    <div id="taglist">
+      {loop="tags"}
+        <div class="tag-list-item pure-g" data-tag="{$key}">
+          <div class="pure-u-1">
+            {if="isLoggedIn()===true"}
+              <a href="#" class="delete-tag"><i class="fa fa-trash"></i></a>&nbsp;&nbsp;
+              <a href="?do=changetag&fromtag={$key|urlencode}" class="rename-tag">
+                <i class="fa fa-pencil-square-o {$key}"></i>
+              </a>
+            {/if}
+
+            <a href="?addtag={$key|urlencode}" title="{'Filter by tag'|t}" class="count">{$value}</a>
+            <a href="?searchtags={$key|urlencode}" class="tag-link">{$key}</a>
+
+            {loop="$value.tag_plugin"}
+              {$value}
+            {/loop}
+          </div>
+          {if="isLoggedIn()===true"}
+            <div class="rename-tag-form pure-u-1" style="display:none;">
+              <input type="text" name="{$key}" value="{$key}" class="rename-tag-input" />
+              <a href="#" class="validate-rename-tag"><i class="fa fa-check"></i></a>
+            </div>
+          {/if}
+        </div>
+      {/loop}
+    </div>
+
+    <div id="plugin_zone_end_tagcloud" class="plugin_zone">
+      {loop="$plugin_end_zone"}
+      {$value}
+      {/loop}
+    </div>
+  </div>
+</div>
+
+{include="tag.sort"}
+
+{include="page.footer"}
+</body>
+</html>
+

tpl/default/tag.sort.html

@@ -0,0 +1,8 @@
+<div class="pure-g">
+  <div class="pure-u-1 pure-alert pure-alert-success tag-sort">
+    {'Sort by:'|t}
+    <a href="?do=tagcloud" title="cloud">{'Cloud'|t}</a> &middot;
+    <a href="?do=taglist&sort=usage" title="cloud">{'Most used'|t}</a> &middot;
+    <a href="?do=taglist&sort=alpha" title="cloud">{'Alphabetical'|t}</a>
+  </div>
+</div>