Initial commit

#pma/js/multi_column_sort.js

@@ -0,0 +1,81 @@
+/* vim: set expandtab sw=4 ts=4 sts=4: */
+/**
+ * @fileoverview    Implements the shiftkey + click remove column
+ *                  from order by clause funcationality
+ * @name            columndelete
+ *
+ * @requires    jQuery
+ */
+
+function captureURL(url)
+{
+    var URL = {};
+    url = '' + url;
+    // Exclude the url part till HTTP
+    url = url.substr(url.search("sql.php"), url.length);
+    // The url part between ORDER BY and &session_max_rows needs to be replaced.
+    URL.head = url.substr(0, url.indexOf('ORDER+BY') + 9);
+    URL.tail = url.substr(url.indexOf("&session_max_rows"), url.length);
+    return URL;
+}
+
+/**
+ * This function is for navigating to the generated URL
+ *
+ * @param object   target HTMLAnchor element
+ * @param object   parent HTMLDom Object
+ */
+
+function removeColumnFromMultiSort(target, parent)
+{
+    var URL = captureURL(target);
+    var begin = target.indexOf('ORDER+BY') + 8;
+    var end = target.indexOf('&session_max_rows');
+    // get the names of the columns involved
+    var between_part = target.substr(begin, end-begin);
+    var columns = between_part.split('%2C+');
+    // If the given column is not part of the order clause exit from this function
+    var index = parent.find('small').length ? parent.find('small').text() : '';
+    if (index === ''){
+        return '';
+    }
+    // Remove the current clicked column
+    columns.splice(index-1, 1);
+    // If all the columns have been removed dont submit a query with nothing
+    // After order by clause.
+    if (columns.length === 0) {
+        var head = URL.head;
+        head = head.slice(0,head.indexOf('ORDER+BY'));
+        URL.head = head;
+        // removing the last sort order should have priority over what
+        // is remembered via the RememberSorting directive
+        URL.tail += '&discard_remembered_sort=1';
+    }
+    var middle_part = columns.join('%2C+');
+    url = URL.head + middle_part + URL.tail;
+    return url;
+}
+
+AJAX.registerOnload('keyhandler.js', function () {
+    $("th.draggable.column_heading.pointer.marker a").on('click', function (event) {
+        var url = $(this).parent().find('input').val();
+        if (event.ctrlKey || event.altKey) {
+            event.preventDefault();
+            url = removeColumnFromMultiSort(url, $(this).parent());
+            if (url) {
+                AJAX.source = $(this);
+                PMA_ajaxShowMessage();
+                $.get(url, {'ajax_request' : true, 'ajax_page_request' : true}, AJAX.responseHandler);
+            }
+        } else if (event.shiftKey) {
+            event.preventDefault();
+            AJAX.source = $(this);
+            PMA_ajaxShowMessage();
+            $.get(url, {'ajax_request' : true, 'ajax_page_request' : true}, AJAX.responseHandler);
+        }
+    });
+});
+
+AJAX.registerTeardown('keyhandler.js', function () {
+    $(document).off('click', "th.draggable.column_heading.pointer.marker a");
+});