]> git.wh0rd.org - tt-rss.git/blobdiff - prefs.js
offline: only ask for offline mode when possible
[tt-rss.git] / prefs.js
index 27367d71255bfddf081cb8009b6924104d686ec5..fc7d1db3673756c5dea12c30a8cef94e867a44ea 100644 (file)
--- a/prefs.js
+++ b/prefs.js
@@ -1,61 +1,40 @@
-var xmlhttp = false;
-
 var active_feed_cat = false;
 var active_tab = false;
 
-var xmlhttp = Ajax.getTransport();
-
 var init_params = new Array();
 
 var caller_subop = false;
 var sanity_check_done = false;
 var hotkey_prefix = false;
 
-function infobox_callback() {
-       if (xmlhttp.readyState == 4) {
-               infobox_callback2(xmlhttp);
-       }
-}
-
-function infobox_submit_callback() {
-       if (xmlhttp.readyState == 4) {
-               infobox_submit_callback2(xmlhttp);
-       }
-}
-
+var color_picker_active = false;
+var selection_disabled = false;
+var mouse_is_down = false;
 
-function replace_pubkey_callback() {
-       if (xmlhttp.readyState == 4) {
-               try {   
-                       var link = document.getElementById("pubGenAddress");
+function replace_pubkey_callback(transport) {
+       try {   
+               var link = $("pubGenAddress");
 
-                       if (xmlhttp.responseXML) {
+               if (transport.responseXML) {
 
-                               var new_link = xmlhttp.responseXML.getElementsByTagName("link")[0];
+                       var new_link = transport.responseXML.getElementsByTagName("link")[0];
 
-                               if (new_link) {
-                                       link.href = new_link.firstChild.nodeValue;
-                                       //link.innerHTML = new_link.firstChild.nodeValue;
+                       if (new_link) {
+                               link.href = new_link.firstChild.nodeValue;
+                               //link.innerHTML = new_link.firstChild.nodeValue;
 
-                                       new Effect.Highlight(link);
-
-                                       notify_info("Published feed URL changed.");
-                               } else {
-                                       notify_error("Could not change feed URL.");
-                               }
+                               new Effect.Highlight(link);
 
+                               notify_info("Published feed URL changed.");
                        } else {
                                notify_error("Could not change feed URL.");
                        }
-               } catch (e) {
-                       exception_error("replace_pubkey_callback", e);
-               }
-       }
-}
 
-function feedlist_callback() {
-       if (xmlhttp.readyState == 4) {
-               return feedlist_callback2(xmlhttp);
+               } else {
+                       notify_error("Could not change feed URL.");
+               }
+       } catch (e) {
+               exception_error("replace_pubkey_callback", e);
        }
 }
 
@@ -63,7 +42,7 @@ function feedlist_callback2(transport) {
 
        try {   
 
-               var container = document.getElementById('prefContent'); 
+               var container = $('prefContent');       
                container.innerHTML=transport.responseText;
                selectTab("feedConfig", true);
 
@@ -93,7 +72,7 @@ function dlg_frefresh_callback(transport) {
 }
 
 function filterlist_callback2(transport) {
-       var container = document.getElementById('prefContent');
+       var container = $('prefContent');
        container.innerHTML=transport.responseText;
        if (typeof correctPNG != 'undefined') {
                correctPNG();
@@ -102,10 +81,26 @@ function filterlist_callback2(transport) {
        remove_splash();
 }
 
+function init_label_inline_editor() {
+       try {
+               if ($("prefLabelList")) {
+                       var elems = $("prefLabelList").getElementsByTagName("SPAN");
+
+                       for (var i = 0; i < elems.length; i++) {
+                               if (elems[i].id && elems[i].id.match("LILT-")) {
+
+                                       var id = elems[i].id.replace("LILT-", "");
+
+                                       new Ajax.InPlaceEditor(elems[i],
+                                               'backend.php?op=pref-labels&subop=save&id=' + id,
+                                               {cols: 20, rows: 1});
+
+                               }
+                       }
+               }
 
-function filterlist_callback() {
-       if (xmlhttp.readyState == 4) {
-               filterlist_callback2(xmlhttp);
+       } catch (e) {
+               exception_error("init_label_inline_editor", e);
        }
 }
 
@@ -113,23 +108,11 @@ function labellist_callback2(transport) {
 
        try {
 
-               var container = document.getElementById('prefContent');
+               var container = $('prefContent');
                        closeInfoBox();
                        container.innerHTML=transport.responseText;
-       
-                       if (document.getElementById("prefLabelList")) {
-                               var elems = document.getElementById("prefLabelList").getElementsByTagName("SPAN");
 
-                               for (var i = 0; i < elems.length; i++) {
-                                       if (elems[i].id && elems[i].id.match("LILT-")) {
-
-                                               var id = elems[i].id.replace("LILT-", "");
-                                                       new Ajax.InPlaceEditor(elems[i],
-                                                       'backend.php?op=pref-labels&subop=save&id=' + id,
-                                                       {cols: 20, rows: 1});
-                                       }
-                               }
-                       }
+                       init_label_inline_editor();
        
                        if (typeof correctPNG != 'undefined') {
                                correctPNG();
@@ -142,86 +125,67 @@ function labellist_callback2(transport) {
        }
 }
 
-function feed_browser_callback() {
-       var container = document.getElementById('prefContent');
-       if (xmlhttp.readyState == 4) {
-               container.innerHTML=xmlhttp.responseText;
-               notify("");
-               remove_splash();
-       }
-}
-
-function userlist_callback() {
-       var container = document.getElementById('prefContent');
-       if (xmlhttp.readyState == 4) {
-               container.innerHTML=xmlhttp.responseText;
-               notify("");
-               remove_splash();
+function userlist_callback2(transport) {
+       try {
+               var container = $('prefContent');
+               if (transport.readyState == 4) {
+                       container.innerHTML=transport.responseText;
+                       notify("");
+                       remove_splash();
+               }
+       } catch (e) {
+               exception_error("userlist_callback2", e);
        }
 }
 
-function prefslist_callback() {
-       var container = document.getElementById('prefContent');
-       if (xmlhttp.readyState == 4) {
-               container.innerHTML=xmlhttp.responseText;
+function prefslist_callback2(transport) {
+       try {
+               var container = $('prefContent');
+               container.innerHTML=transport.responseText;
                notify("");
                remove_splash();
+       } catch (e) {
+               exception_error("prefslist_callback2", e);
        }
 }
 
-function gethelp_callback() {
-       var container = document.getElementById('prefHelpBox');
-       if (xmlhttp.readyState == 4) {
-
-               container.innerHTML = xmlhttp.responseText;
-               container.style.display = "block";
-
-       }
-}
-
-function notify_callback() {
-       if (xmlhttp.readyState == 4) {
-               notify_callback2(xmlhttp);
-       } 
-}
-
 function notify_callback2(transport) {
        notify_info(transport.responseText);     
 }
 
-function prefs_reset_callback() {
-       if (xmlhttp.readyState == 4) {
-               notify_info(xmlhttp.responseText);
+function prefs_reset_callback2(transport) {
+       try {
+               notify_info(transport.responseText);
                selectTab();
-       } 
+       } catch (e) {
+               exception_error("prefs_reset_callback2", e);
+       }
 }
 
 
-function changepass_callback() {
+function changepass_callback2(transport) {
        try {
-               if (xmlhttp.readyState == 4) {
        
-                       if (xmlhttp.responseText.indexOf("ERROR: ") == 0) {
-                               notify_error(xmlhttp.responseText.replace("ERROR: ", ""));
+                       if (transport.responseText.indexOf("ERROR: ") == 0) {
+                               notify_error(transport.responseText.replace("ERROR: ", ""));
                        } else {
-                               notify_info(xmlhttp.responseText);
-                               var warn = document.getElementById("default_pass_warning");
+                               notify_info(transport.responseText);
+                               var warn = $("default_pass_warning");
                                if (warn) warn.style.display = "none";
                        }
        
                        document.forms['change_pass_form'].reset();
 
-               } 
        } catch (e) {
-               exception_error("changepass_callback", e);
+               exception_error("changepass_callback2", e);
        }
 }
 
 function init_cat_inline_editor() {
        try {
 
-               if (document.getElementById("prefFeedCatList")) {
-                       var elems = document.getElementById("prefFeedCatList").getElementsByTagName("SPAN");
+               if ($("prefFeedCatList")) {
+                       var elems = $("prefFeedCatList").getElementsByTagName("SPAN");
 
                        for (var i = 0; i < elems.length; i++) {
                                if (elems[i].id && elems[i].id.match("FCATT-")) {
@@ -250,11 +214,11 @@ function updateFeedList(sort_key) {
 
        try {
 
-       var feed_search = document.getElementById("feed_search");
+       var feed_search = $("feed_search");
        var search = "";
        if (feed_search) { search = feed_search.value; }
 
-       var slat = document.getElementById("show_last_article_times");
+       var slat = $("show_last_article_times");
 
        var slat_checked = false;
        if (slat) {
@@ -277,21 +241,24 @@ function updateFeedList(sort_key) {
 
 function updateUsersList(sort_key) {
 
-       if (!xmlhttp_ready(xmlhttp)) {
-               printLockingError();
-               return
-       }
-
-       var user_search = document.getElementById("user_search");
-       var search = "";
-       if (user_search) { search = user_search.value; }
+       try {
 
-       xmlhttp.open("GET", "backend.php?op=pref-users&sort="
-               + param_escape(sort_key) +
-               "&search=" + param_escape(search), true);
-       xmlhttp.onreadystatechange=userlist_callback;
-       xmlhttp.send(null);
+               var user_search = $("user_search");
+               var search = "";
+               if (user_search) { search = user_search.value; }
+       
+               var query = "backend.php?op=pref-users&sort="
+                       + param_escape(sort_key) +
+                       "&search=" + param_escape(search);
+       
+               new Ajax.Request(query, {
+                       onComplete: function(transport) { 
+                               userlist_callback2(transport); 
+                       } });
 
+       } catch (e) {
+               exception_error("updateUsersList", e);
+       }
 }
 
 function addLabel() {
@@ -329,7 +296,7 @@ function addFeed() {
 
        try {
 
-               var link = document.getElementById("fadd_link");
+               var link = $("fadd_link");
        
                if (link.value.length == 0) {
                        alert(__("Error: No feed URL given."));
@@ -358,12 +325,7 @@ function addFeed() {
 
 function addFeedCat() {
 
-       if (!xmlhttp_ready(xmlhttp)) {
-               printLockingError();
-               return
-       }
-
-       var cat = document.getElementById("fadd_cat");
+       var cat = $("fadd_cat");
 
        if (cat.value.length == 0) {
                alert(__("Can't add category: no name specified."));
@@ -381,31 +343,36 @@ function addFeedCat() {
                link.value = "";
 
        }
-
 }
-function addUser() {
 
-       if (!xmlhttp_ready(xmlhttp)) {
-               printLockingError();
-               return
-       }
+function addUser() {
 
-       var sqlexp = document.getElementById("uadd_box");
+       try {
 
-       if (sqlexp.value.length == 0) {
-               alert(__("Can't add user: no login specified."));
-       } else {
+               var login = prompt(__("Please enter login:"), "");
+       
+               if (login == null) { 
+                       return false;
+               }
+       
+               if (login == "") {
+                       alert(__("Can't create user: no login specified."));
+                       return false;
+               }
+       
                notify_progress("Adding user...");
+       
+               var query = "backend.php?op=pref-users&subop=add&login=" +
+                       param_escape(login);
+                               
+               new Ajax.Request(query, {
+                       onComplete: function(transport) { 
+                               userlist_callback2(transport); 
+                       } });
 
-               xmlhttp.open("GET", "backend.php?op=pref-users&subop=add&login=" +
-                       param_escape(sqlexp.value), true);                      
-                       
-               xmlhttp.onreadystatechange=userlist_callback;
-               xmlhttp.send(null);
-
-               sqlexp.value = "";
+       } catch (e) {
+               exception_error("addUser", e);
        }
-
 }
 
 function editUser(id) {
@@ -537,28 +504,33 @@ function removeSelectedLabels() {
 
 function removeSelectedUsers() {
 
-       if (!xmlhttp_ready(xmlhttp)) {
-               printLockingError();
-               return
-       }
-
-       var sel_rows = getSelectedUsers();
-
-       if (sel_rows.length > 0) {
-
-               var ok = confirm(__("Remove selected users?"));
+       try {
 
-               if (ok) {
-                       notify_progress("Removing selected users...");
+               var sel_rows = getSelectedUsers();
+       
+               if (sel_rows.length > 0) {
+       
+                       var ok = confirm(__("Remove selected users?"));
+       
+                       if (ok) {
+                               notify_progress("Removing selected users...");
+               
+                               var query = "backend.php?op=pref-users&subop=remove&ids="+
+                                       param_escape(sel_rows.toString());
        
-                       xmlhttp.open("GET", "backend.php?op=pref-users&subop=remove&ids="+
-                               param_escape(sel_rows.toString()), true);
-                       xmlhttp.onreadystatechange=userlist_callback;
-                       xmlhttp.send(null);
+                               new Ajax.Request(query, {
+                                       onComplete: function(transport) { 
+                                               userlist_callback2(transport); 
+                                       } });
+       
+                       }
+       
+               } else {
+                       alert(__("No users are selected."));
                }
 
-       } else {
-               alert(__("No users are selected."));
+       } catch (e) {
+               exception_error("removeSelectedUsers", e);
        }
 
        return false;
@@ -566,27 +538,32 @@ function removeSelectedUsers() {
 
 function removeSelectedFilters() {
 
-       if (!xmlhttp_ready(xmlhttp)) {
-               printLockingError();
-               return
-       }
-
-       var sel_rows = getSelectedFilters();
-
-       if (sel_rows.length > 0) {
-
-               var ok = confirm(__("Remove selected filters?"));
+       try {
 
-               if (ok) {
-                       notify_progress("Removing selected filters...");
+               var sel_rows = getSelectedFilters();
+       
+               if (sel_rows.length > 0) {
+       
+                       var ok = confirm(__("Remove selected filters?"));
+       
+                       if (ok) {
+                               notify_progress("Removing selected filters...");
+               
+                               var query = "backend.php?op=pref-filters&subop=remove&ids="+
+                                       param_escape(sel_rows.toString());
        
-                       xmlhttp.open("GET", "backend.php?op=pref-filters&subop=remove&ids="+
-                               param_escape(sel_rows.toString()), true);
-                       xmlhttp.onreadystatechange=filterlist_callback;
-                       xmlhttp.send(null);
+                               new Ajax.Request(query, {
+                                               onComplete: function(transport) {
+                                                               filterlist_callback2(transport);
+                                       } });
+       
+                       }
+               } else {
+                       alert(__("No filters are selected."));
                }
-       } else {
-               alert(__("No filters are selected."));
+
+       } catch (e) {
+               exception_error("removeSelectedFilters", e);
        }
 
        return false;
@@ -656,11 +633,6 @@ function clearSelectedFeeds() {
 
 function purgeSelectedFeeds() {
 
-       if (!xmlhttp_ready(xmlhttp)) {
-               printLockingError();
-               return
-       }
-
        var sel_rows = getSelectedFeeds();
 
        if (sel_rows.length > 0) {
@@ -692,11 +664,6 @@ function purgeSelectedFeeds() {
 
 function removeSelectedFeedCats() {
 
-       if (!xmlhttp_ready(xmlhttp)) {
-               printLockingError();
-               return
-       }
-
        var sel_rows = getSelectedFeedCats();
 
        if (sel_rows.length > 0) {
@@ -727,14 +694,9 @@ function removeSelectedFeedCats() {
 
 function feedEditCancel() {
 
-       if (!xmlhttp_ready(xmlhttp)) {
-               printLockingError();
-               return
-       }
-
        try {
-               document.getElementById("subscribe_to_feed_btn").disabled = false;
-               document.getElementById("top25_feeds_btn").disabled = false;
+               $("subscribe_to_feed_btn").disabled = false;
+               $("top25_feeds_btn").disabled = false;
        } catch (e) {
                // this button is not always available, no-op if not found
        }
@@ -773,11 +735,6 @@ function feedEditSave() {
 
 function userEditCancel() {
 
-       if (!xmlhttp_ready(xmlhttp)) {
-               printLockingError();
-               return
-       }
-
        selectPrefRows('user', false); // cleanup feed selection
        closeInfoBox();
 
@@ -786,13 +743,8 @@ function userEditCancel() {
 
 function filterEditCancel() {
 
-       if (!xmlhttp_ready(xmlhttp)) {
-               printLockingError();
-               return
-       }
-
        try {
-               document.getElementById("create_filter_btn").disabled = false;
+               $("create_filter_btn").disabled = false;
                selectPrefRows('filter', false); // cleanup feed selection
        } catch (e) { }
 
@@ -803,59 +755,56 @@ function filterEditCancel() {
 
 function userEditSave() {
 
-       if (!xmlhttp_ready(xmlhttp)) {
-               printLockingError();
-               return
-       }
-
-       var login = document.forms["user_edit_form"].login.value;
+       try {
 
-       if (login.length == 0) {
-               alert(__("Login field cannot be blank."));
-               return;
-       }
+               var login = document.forms["user_edit_form"].login.value;
        
-       notify_progress("Saving user...");
-
-       closeInfoBox();
-
-       var query = Form.serialize("user_edit_form");
+               if (login.length == 0) {
+                       alert(__("Login field cannot be blank."));
+                       return;
+               }
+               
+               notify_progress("Saving user...");
        
-       xmlhttp.open("GET", "backend.php?" + query, true);                      
-       xmlhttp.onreadystatechange=userlist_callback;
-       xmlhttp.send(null);
+               closeInfoBox();
+       
+               var query = Form.serialize("user_edit_form");
+               
+               new Ajax.Request("backend.php", {
+                       parameters: query,
+                       onComplete: function(transport) { 
+                               userlist_callback2(transport); 
+                       } });
+       
+       } catch (e) {
+               exception_error("userEditSave", e);
+       }
 
        return false;
+
 }
 
 
 function filterEditSave() {
 
-       if (!xmlhttp_ready(xmlhttp)) {
-               printLockingError();
-               return
-       }
+       try {
 
-/*     if (!is_opera()) {
-               var reg_exp = document.forms["filter_edit_form"].reg_exp.value;
+               notify_progress("Saving filter...");
        
-               if (reg_exp.length == 0) {
-                       alert("Filter expression field cannot be blank.");
-                       return;
-               }
-       } */
-
-       notify_progress("Saving filter...");
-
-       var query = Form.serialize("filter_edit_form");
-
-       closeInfoBox();
+               var query = "backend.php?" + Form.serialize("filter_edit_form");
+       
+               closeInfoBox();
+       
+               $("create_filter_btn").disabled = false;
 
-       document.getElementById("create_filter_btn").disabled = false;
+               new Ajax.Request(query, {
+                               onComplete: function(transport) {
+                                               filterlist_callback2(transport);
+                       } });
 
-       xmlhttp.open("GET", "backend.php?" + query, true);
-       xmlhttp.onreadystatechange=filterlist_callback;
-       xmlhttp.send(null);
+       } catch (e) {
+               exception_error("filterEditSave", e);
+       }
 
        return false;
 }
@@ -880,29 +829,40 @@ function editSelectedUser() {
 }
 
 function resetSelectedUserPass() {
-       var rows = getSelectedUsers();
 
-       if (rows.length == 0) {
-               alert(__("No users are selected."));
-               return;
-       }
-
-       if (rows.length > 1) {
-               alert(__("Please select only one user."));
-               return;
-       }
-
-       var ok = confirm(__("Reset password of selected user?"));
+       try {
 
-       if (ok) {
-               notify_progress("Resetting password for selected user...");
+               var rows = getSelectedUsers();
        
-               var id = rows[0];
+               if (rows.length == 0) {
+                       alert(__("No users are selected."));
+                       return;
+               }
+       
+               if (rows.length > 1) {
+                       alert(__("Please select only one user."));
+                       return;
+               }
+       
+               var ok = confirm(__("Reset password of selected user?"));
+       
+               if (ok) {
+                       notify_progress("Resetting password for selected user...");
+               
+                       var id = rows[0];
+               
+                       var query = "backend.php?op=pref-users&subop=resetPass&id=" +
+                               param_escape(id);
        
-               xmlhttp.open("GET", "backend.php?op=pref-users&subop=resetPass&id=" +
-                       param_escape(id), true);
-               xmlhttp.onreadystatechange=userlist_callback;
-               xmlhttp.send(null);
+                       new Ajax.Request(query, {
+                               onComplete: function(transport) { 
+                                       userlist_callback2(transport); 
+                               } });
+       
+               }
+
+       } catch (e) {
+               exception_error("resetSelectedUserPass", e);
        }
 }
 
@@ -1009,7 +969,7 @@ function editSelectedFeeds() {
 function piggie(enable) {
        if (enable) {
                debug("I LOVEDED IT!");
-               var piggie = document.getElementById("piggie");
+               var piggie = $("piggie");
 
                Element.show(piggie);
                Position.Center(piggie);
@@ -1020,7 +980,7 @@ function piggie(enable) {
 
 function validateOpmlImport() {
        
-       var opml_file = document.getElementById("opml_file");
+       var opml_file = $("opml_file");
 
        if (opml_file.value.length == 0) {
                alert(__("No OPML file to upload."));
@@ -1031,21 +991,24 @@ function validateOpmlImport() {
 }
 
 function updateFilterList(sort_key) {
+       try {
 
-       if (!xmlhttp_ready(xmlhttp)) {
-               printLockingError();
-               return
-       }
+               var filter_search = $("filter_search");
+               var search = "";
+               if (filter_search) { search = filter_search.value; }
+       
+               var query = "backend.php?op=pref-filters&sort=" + 
+                       param_escape(sort_key) + 
+                       "&search=" + param_escape(search);
 
-       var filter_search = document.getElementById("filter_search");
-       var search = "";
-       if (filter_search) { search = filter_search.value; }
+               new Ajax.Request(query, {
+                               onComplete: function(transport) {
+                                               filterlist_callback2(transport);
+                       } });
 
-       xmlhttp.open("GET", "backend.php?op=pref-filters&sort=" + 
-               param_escape(sort_key) + 
-               "&search=" + param_escape(search), true);
-       xmlhttp.onreadystatechange=filterlist_callback;
-       xmlhttp.send(null);
+       } catch (e) {
+               exception_error("updateFilterList", e);
+       }
 
 }
 
@@ -1053,7 +1016,7 @@ function updateLabelList(sort_key) {
 
        try {
 
-               var label_search = document.getElementById("label_search");
+               var label_search = $("label_search");
                var search = "";
                if (label_search) { search = label_search.value; }
        
@@ -1073,14 +1036,12 @@ function updateLabelList(sort_key) {
 
 function updatePrefsList() {
 
-       if (!xmlhttp_ready(xmlhttp)) {
-               printLockingError();
-               return
-       }
+       var query = "backend.php?op=pref-prefs";
 
-       xmlhttp.open("GET", "backend.php?op=pref-prefs", true);
-       xmlhttp.onreadystatechange=prefslist_callback;
-       xmlhttp.send(null);
+       new Ajax.Request(query, {
+               onComplete: function(transport) { 
+                       prefslist_callback2(transport); 
+               } });
 
 }
 
@@ -1092,13 +1053,8 @@ function selectTab(id, noupdate, subop) {
 
        try {
 
-               if (!xmlhttp_ready(xmlhttp)) {
-                       printLockingError();
-                       return
-               }
-
                try {
-                       var c = document.getElementById('prefContent'); 
+                       var c = $('prefContent');       
                        c.scrollTop = 0;
                } catch (e) { };
 
@@ -1132,7 +1088,7 @@ function selectTab(id, noupdate, subop) {
 
                /* clean selection from all tabs */
        
-               var tabs_holder = document.getElementById("prefTabs");
+               var tabs_holder = $("prefTabs");
                var tab = tabs_holder.firstChild;
 
                while (tab) {
@@ -1144,7 +1100,7 @@ function selectTab(id, noupdate, subop) {
 
                /* mark new tab as selected */
 
-               tab = document.getElementById(id + "Tab");
+               tab = $(id + "Tab");
        
                if (tab) {
                        if (!tab.className.match("Selected")) {
@@ -1159,73 +1115,72 @@ function selectTab(id, noupdate, subop) {
        }
 }
 
-function backend_sanity_check_callback() {
+function backend_sanity_check_callback2(transport) {
 
-       if (xmlhttp.readyState == 4) {
+       try {
 
-               try {
+               if (sanity_check_done) {
+                       fatalError(11, "Sanity check request received twice. This can indicate "+
+                     "presence of Firebug or some other disrupting extension. "+
+                               "Please disable it and try again.");
+                       return;
+               }
 
-                       if (sanity_check_done) {
-                               fatalError(11, "Sanity check request received twice. This can indicate "+
-                             "presence of Firebug or some other disrupting extension. "+
-                                       "Please disable it and try again.");
-                               return;
-                       }
+               if (!transport.responseXML) {
+                       fatalError(3, "Sanity Check: Received reply is not XML", 
+                               transport.responseText);
+                       return;
+               }
 
-                       if (!xmlhttp.responseXML) {
-                               fatalError(3, "Sanity Check: Received reply is not XML", 
-                                       xmlhttp.responseText);
-                               return;
-                       }
-       
-                       var reply = xmlhttp.responseXML.firstChild.firstChild;
-       
-                       if (!reply) {
-                               fatalError(3, "Sanity Check: Invalid RPC reply", xmlhttp.responseText);
-                               return;
-                       }
-       
-                       var error_code = reply.getAttribute("error-code");
-               
-                       if (error_code && error_code != 0) {
-                               return fatalError(error_code, reply.getAttribute("error-msg"));
-                       }
+               var reply = transport.responseXML.firstChild.firstChild;
+
+               if (!reply) {
+                       fatalError(3, "Sanity Check: Invalid RPC reply", transport.responseText);
+                       return;
+               }
+
+               var error_code = reply.getAttribute("error-code");
        
-                       debug("sanity check ok");
+               if (error_code && error_code != 0) {
+                       return fatalError(error_code, reply.getAttribute("error-msg"));
+               }
 
-                       var params = reply.nextSibling;
+               debug("sanity check ok");
 
-                       if (params) {
-                               debug('reading init-params...');
-                               var param = params.firstChild;
+               var params = reply.nextSibling;
 
-                               while (param) {
-                                       var k = param.getAttribute("key");
-                                       var v = param.getAttribute("value");
-                                       debug(k + " => " + v);
-                                       init_params[k] = v;                                     
-                                       param = param.nextSibling;
-                               }
+               if (params) {
+                       debug('reading init-params...');
+                       var param = params.firstChild;
+
+                       while (param) {
+                               var k = param.getAttribute("key");
+                               var v = param.getAttribute("value");
+                               debug(k + " => " + v);
+                               init_params[k] = v;                                     
+                               param = param.nextSibling;
                        }
+               }
 
-                       sanity_check_done = true;
+               sanity_check_done = true;
 
-                       init_second_stage();
+               init_second_stage();
 
-               } catch (e) {
-                       exception_error("backend_sanity_check_callback", e);
-               }
-       } 
+       } catch (e) {
+               exception_error("backend_sanity_check_callback", e);
+       }
 }
 
 function init_second_stage() {
 
        try {
                active_tab = getInitParam("prefs_active_tab");
-               if (!document.getElementById(active_tab+"Tab")) active_tab = "genConfig";
+               if (!$(active_tab+"Tab")) active_tab = "genConfig";
                if (!active_tab || active_tab == '0') active_tab = "genConfig";
 
                document.onkeydown = pref_hotkey_handler;
+               document.onmousedown = mouse_down_handler;
+               document.onmouseup = mouse_up_handler;
 
                var tab = getURLParam('tab');
                
@@ -1265,19 +1220,14 @@ function init() {
                        debug('debug mode activated');
                }
 
-               // IE kludge
-               if (!xmlhttp) {
-                       document.getElementById("prefContent").innerHTML = 
-                               "<b>Fatal error:</b> This program needs XmlHttpRequest " + 
-                               "to function properly. Your browser doesn't seem to support it.";
-                       return;
-               }
-
                loading_set_progress(30);
 
-               xmlhttp.open("GET", "backend.php?op=rpc&subop=sanityCheck", true);
-               xmlhttp.onreadystatechange=backend_sanity_check_callback;
-               xmlhttp.send(null);
+               var query = "backend.php?op=rpc&subop=sanityCheck";
+
+               new Ajax.Request(query, {
+                       onComplete: function(transport) { 
+                               backend_sanity_check_callback2(transport);
+                       } });
 
        } catch (e) {
                exception_error("init", e);
@@ -1286,14 +1236,9 @@ function init() {
 
 function categorizeSelectedFeeds() {
 
-       if (!xmlhttp_ready(xmlhttp)) {
-               printLockingError();
-               return
-       }
-
        var sel_rows = getSelectedFeeds();
 
-       var cat_sel = document.getElementById("sfeed_set_fcat");
+       var cat_sel = $("sfeed_set_fcat");
        var cat_id = cat_sel[cat_sel.selectedIndex].value;
 
        if (sel_rows.length > 0) {
@@ -1326,10 +1271,12 @@ function validatePrefsReset() {
                        query = query + "&subop=reset-config";
                        debug(query);
 
-                       xmlhttp.open("POST", "backend.php", true);
-                       xmlhttp.onreadystatechange=prefs_reset_callback;
-                       xmlhttp.setRequestHeader('Content-Type', 'application/x-www-form-urlencoded');
-                       xmlhttp.send(query);
+                       new Ajax.Request("backend.php", {
+                               parameters: query,
+                               onComplete: function(transport) { 
+                                       prefs_reset_callback2(transport);
+                               } });
+
                }
 
        } catch (e) {
@@ -1477,6 +1424,7 @@ function pref_hotkey_handler(e) {
                        if (Element.visible("hotkey_help_overlay")) {
                                Element.hide("hotkey_help_overlay");
                        }
+                       colorPickerHideAll();
                        hotkey_prefix = false;
                        closeInfoBox();
                } 
@@ -1533,7 +1481,7 @@ function pref_hotkey_handler(e) {
                                        "feed_search", "filter_search", "user_search", "feed_browser_search");
 
                                for (var i = 0; i < search_boxes.length; i++) {
-                                       var elem = document.getElementById(search_boxes[i]);
+                                       var elem = $(search_boxes[i]);
                                        if (elem) {
                                                focus_element(search_boxes[i]);
                                                return false;
@@ -1584,27 +1532,27 @@ function pref_hotkey_handler(e) {
 
                        hotkey_prefix = false;
 
-                       if (keycode == 49 && document.getElementById("genConfigTab")) { // 1
+                       if (keycode == 49 && $("genConfigTab")) { // 1
                                selectTab("genConfig");
                                return false;
                        }
 
-                       if (keycode == 50 && document.getElementById("feedConfigTab")) { // 2
+                       if (keycode == 50 && $("feedConfigTab")) { // 2
                                selectTab("feedConfig");
                                return false;
                        }
 
-                       if (keycode == 51 && document.getElementById("filterConfigTab")) { // 4
+                       if (keycode == 51 && $("filterConfigTab")) { // 4
                                selectTab("filterConfig");
                                return false;
                        }
 
-                       if (keycode == 52 && document.getElementById("labelConfigTab")) { // 5
+                       if (keycode == 52 && $("labelConfigTab")) { // 5
                                selectTab("labelConfig");
                                return false;
                        }
 
-                       if (keycode == 53 && document.getElementById("userConfigTab")) { // 6
+                       if (keycode == 53 && $("userConfigTab")) { // 6
                                selectTab("userConfig");
                                return false;
                        }
@@ -1615,7 +1563,7 @@ function pref_hotkey_handler(e) {
 
                }
 
-               if (document.getElementById("piggie")) {
+               if ($("piggie")) {
        
                        if (seq.match("807371717369")) {
                                seq = "";
@@ -1638,10 +1586,10 @@ function pref_hotkey_handler(e) {
 
 function editFeedCats() {
        try {
-               document.getElementById("subscribe_to_feed_btn").disabled = true;
+               $("subscribe_to_feed_btn").disabled = true;
        
                try {
-                       document.getElementById("top25_feeds_btn").disabled = true;
+                       $("top25_feeds_btn").disabled = true;
                } catch (e) {
                        // this button is not always available, no-op if not found
                }
@@ -1665,11 +1613,6 @@ function changeUserPassword() {
 
        try {
 
-               if (!xmlhttp_ready(xmlhttp)) {
-                       printLockingError();
-                       return false;
-               }
-       
                var f = document.forms["change_pass_form"];
 
                if (f) {
@@ -1703,11 +1646,13 @@ function changeUserPassword() {
                var query = Form.serialize("change_pass_form");
        
                notify_progress("Trying to change password...");
-       
-               xmlhttp.open("POST", "backend.php", true);
-               xmlhttp.onreadystatechange=changepass_callback;
-               xmlhttp.setRequestHeader('Content-Type', 'application/x-www-form-urlencoded');
-               xmlhttp.send(query);
+
+               new Ajax.Request("backend.php", {
+                       parameters: query,
+                       onComplete: function(transport) { 
+                               changepass_callback2(transport); 
+                       } });
+
 
        } catch (e) {
                exception_error("changeUserPassword", e);
@@ -1720,19 +1665,15 @@ function changeUserEmail() {
 
        try {
 
-               if (!xmlhttp_ready(xmlhttp)) {
-                       printLockingError();
-                       return false;
-               }
-       
                var query = Form.serialize("change_email_form");
        
                notify_progress("Trying to change e-mail...");
        
-               xmlhttp.open("POST", "backend.php", true);
-               xmlhttp.onreadystatechange=notify_callback;
-               xmlhttp.setRequestHeader('Content-Type', 'application/x-www-form-urlencoded');
-               xmlhttp.send(query);
+               new Ajax.Request("backend.php", {
+                       parameters: query,
+                       onComplete: function(transport) { 
+                               notify_callback2(transport); 
+                       } });
 
        } catch (e) {
                exception_error("changeUserPassword", e);
@@ -1749,42 +1690,22 @@ function feedlistToggleSLAT() {
 
 function pubRegenKey() {
 
-       if (!xmlhttp_ready(xmlhttp)) {
-               printLockingError();
-               return false;
-       }
-
        var ok = confirm(__("Replace current publishing address with a new one?"));
 
        if (ok) {
 
                notify_progress("Trying to change address...");
 
-               xmlhttp.open("GET", "backend.php?op=rpc&subop=regenPubKey");
-               xmlhttp.onreadystatechange=replace_pubkey_callback;
-               xmlhttp.send(null);
-       }
-
-       return false;
-}
+               var query = "backend.php?op=rpc&subop=regenPubKey";
 
-function pubToClipboard() {
-
-       try {
-
-               if (!xmlhttp_ready(xmlhttp)) {
-                       printLockingError();
-                       return false;
-               }
-       
-               var link = document.getElementById("pubGenAddress");
-               alert(link.href);
+               new Ajax.Request(query, {
+                       onComplete: function(transport) {
+                                       replace_pubkey_callback(transport);
+                               } });
 
-       } catch (e) {
-               exception_error("pubToClipboard", e);
        }
 
-       return false; 
+       return false;
 }
 
 function validatePrefsSave() {
@@ -1798,10 +1719,12 @@ function validatePrefsSave() {
                        query = query + "&subop=save-config";
                        debug(query);
 
-                       xmlhttp.open("POST", "backend.php", true);
-                       xmlhttp.onreadystatechange=notify_callback;
-                       xmlhttp.setRequestHeader('Content-Type', 'application/x-www-form-urlencoded');
-                       xmlhttp.send(query);
+                       new Ajax.Request("backend.php", {
+                               parameters: query,
+                               onComplete: function(transport) { 
+                               notify_callback2(transport); 
+                       } });
+
                }
 
        } catch (e) {
@@ -1813,7 +1736,7 @@ function validatePrefsSave() {
 
 function feedActionChange() {
        try {
-               var chooser = document.getElementById("feedActionChooser");
+               var chooser = $("feedActionChooser");
                var opid = chooser[chooser.selectedIndex].value;
 
                chooser.selectedIndex = 0;
@@ -1951,40 +1874,37 @@ function removeFilter(id, title) {
 
 function unsubscribeFeed(id, title) {
 
-       if (!xmlhttp_ready(xmlhttp)) {
-               printLockingError();
-               return
-       }
-
-       var msg = __("Unsubscribe from %s?").replace("%s", title);
-
-       var ok = confirm(msg);
-
-       if (ok) {
-               closeInfoBox();
+       try {
 
-               notify_progress("Removing feed...");
+               var msg = __("Unsubscribe from %s?").replace("%s", title);
+       
+               var ok = confirm(msg);
+       
+               if (ok) {
+                       closeInfoBox();
+       
+                       notify_progress("Removing feed...");
+               
+                       var query = "backend.php?op=pref-feeds&subop=remove&ids="+
+                               param_escape(id);
+       
+                       new Ajax.Request(query, {
+                                       onComplete: function(transport) {
+                                                       feedlist_callback2(transport);
+                               } });
+               }
        
-               xmlhttp.open("GET", "backend.php?op=pref-feeds&subop=remove&ids="+
-                       param_escape(id), true);
-               xmlhttp.onreadystatechange=filterlist_callback;
-               xmlhttp.send(null);
+       } catch (e) {
+               exception_error("unsubscribeFeed", e);
        }
 
        return false;
 
-       return false;
-
 }
 
 function feedsEditSave() {
        try {
 
-               if (!xmlhttp_ready(xmlhttp)) {
-                       printLockingError();
-                       return
-               }
-
                var ok = confirm(__("Save changes to selected feeds?"));
 
                if (ok) {
@@ -2041,7 +1961,7 @@ function feedsEditSave() {
 function batchFeedsToggleField(cb, elem, label) {
        try {
                var f = document.forms["batch_edit_feed_form"];
-               var l = document.getElementById(label);
+               var l = $(label);
 
                if (cb.checked) {
                        f[elem].disabled = false;
@@ -2066,4 +1986,149 @@ function batchFeedsToggleField(cb, elem, label) {
        }
 }
 
+function labelColorReset() {
+       try {
+               var labels = getSelectedLabels();
+
+               var ok = confirm(__("Reset label colors to default?"));
+
+               if (ok) {
+
+                       var query = "backend.php?op=pref-labels&subop=color-reset&ids="+
+                               param_escape(labels.toString());
+
+                       new Ajax.Request(query, {
+                               onComplete: function(transport) {
+                                               labellist_callback2(transport);
+                                       } });
+               }
+
+       } catch (e) {
+               exception_error("labelColorReset", e);
+       }
+}
+
+function labelColorAsk(id, kind) {
+       try {
+
+               var p = null
+
+               if (kind == "fg") {
+                       p = prompt(__("Please enter new label foreground color:"));
+               } else {
+                       p = prompt(__("Please enter new label background color:"));
+               }
+
+               if (p != null) {
+
+                       var query = "backend.php?op=pref-labels&subop=color-set&kind=" + kind +
+                               "&ids="+        param_escape(id) + "&color=" + param_escape(p);
+
+                       selectPrefRows('label', false);
+
+                       var e = $("LICID-" + id);
+
+                       if (e) {                
+                               if (kind == "fg") {
+                                       e.style.color = p
+                               } else {
+                                       e.style.backgroundColor = p;
+                               }
+                       }
+
+                       new Ajax.Request(query);
+               }
+
+       } catch (e) {
+               exception_error("labelColorReset", e);
+       }
+}
+
+
+function colorPicker(id, fg, bg) {
+       try {
+               var picker = $("colorPicker-" + id);
+
+               if (picker) Element.show(picker);
+
+       } catch (e) {
+               exception_error("colorPicker", e);
+       }
+}
+
+function colorPickerHideAll() {
+       try {
+               if ($("prefLabelList")) {
+
+                       var elems = $("prefLabelList").getElementsByTagName("DIV");
+
+                       for (var i = 0; i < elems.length; i++) {
+                               if (elems[i].id && elems[i].id.match("colorPicker-")) {
+                                       Element.hide(elems[i]);
+                               }
+                       }
+               }
+
+       } catch (e) {
+               exception_error("colorPickerHideAll", e);
+       }
+}
+
+function colorPickerDo(id, fg, bg) {
+       try {
+
+               var query = "backend.php?op=pref-labels&subop=color-set&kind=both"+
+                       "&ids=" + param_escape(id) + "&fg=" + param_escape(fg) + 
+                       "&bg=" + param_escape(bg);
+
+               var e = $("LICID-" + id);
+
+               if (e) {                
+                       e.style.color = fg;
+                       e.style.backgroundColor = bg;
+               }
+
+               new Ajax.Request(query);
+
+       } catch (e) {
+               exception_error("colorPickerDo", e);
+       }
+}
+
+function colorPickerActive(b) {
+       color_picker_active = b;
+}
+
+function mouse_down_handler(e) {
+       try {
+
+               /* do not prevent right click */
+               if (e.button && e.button == 2) return;
+
+               if (selection_disabled) {
+                       document.onselectstart = function() { return false; };
+                       return false;
+               }
+
+       } catch (e) {
+               exception_error("mouse_move_handler", e);
+       }
+}
+
+function mouse_up_handler(e) {
+       try {
+               mouse_is_down = false;
+
+               if (!selection_disabled) {
+                       document.onselectstart = null;
+               }
+
+               if (!color_picker_active) {
+                       colorPickerHideAll();
+               }
+
+       } catch (e) {
+               exception_error("mouse_move_handler", e);
+       }
+}