libs/cbi/htdocs/luci-static/resources/cbi.js

   1 /*
   2         LuCI - Lua Configuration Interface
   3
   4         Copyright 2008 Steven Barth <steven@midlink.org>
   5         Copyright 2008 Jo-Philipp Wich <xm@leipzig.freifunk.net>
   6
   7         Licensed under the Apache License, Version 2.0 (the "License");
   8         you may not use this file except in compliance with the License.
   9         You may obtain a copy of the License at
  10
  11         http://www.apache.org/licenses/LICENSE-2.0
  12
  13         $Id$
  14 */
  15
  16 var cbi_d = [];
  17
  18 function cbi_d_add(field, dep, next) {
  19         var obj = document.getElementById(field);
  20         if (obj) {
  21                 var entry
  22                 for (var i=0; i<cbi_d.length; i++) {
  23                         if (cbi_d[i].id == field) {
  24                                 entry = cbi_d[i];
  25                                 break;
  26                         }
  27                 }
  28                 if (!entry) {
  29                         entry = {
  30                                 "node": obj,
  31                                 "id": field,
  32                                 "parent": obj.parentNode.id,
  33                                 "next": next,
  34                                 "deps": []
  35                         };
  36                         cbi_d.unshift(entry);
  37                 }
  38                 entry.deps.push(dep)
  39         }
  40 }
  41
  42 function cbi_d_checkvalue(target, ref) {
  43         var t = document.getElementById(target);
  44         var value;
  45
  46         if (!t || !t.value) {
  47                 value = "";
  48         } else {
  49                 value = t.value;
  50
  51                 if (t.type == "checkbox") {
  52                         value = t.checked ? value : "";
  53                 }
  54         }
  55
  56         return (value == ref)
  57 }
  58
  59 function cbi_d_check(deps) {
  60         for (var i=0; i<deps.length; i++) {
  61                 var istat = true
  62                 for (var j in deps[i]) {
  63                         istat = (istat && cbi_d_checkvalue(j, deps[i][j]))
  64                 }
  65                 if (istat) {
  66                         return true
  67                 }
  68         }
  69 }
  70
  71 function cbi_d_update() {
  72         var state = false;
  73         for (var i=0; i<cbi_d.length; i++) {
  74                 var entry = cbi_d[i];
  75                 var next  = document.getElementById(entry.next)
  76                 var node  = document.getElementById(entry.id)
  77                 var parent = document.getElementById(entry.parent)
  78
  79                 if (node && node.parentNode && !cbi_d_check(entry.deps)) {
  80                         node.parentNode.removeChild(node);
  81                         state = (state || !node.parentNode)
  82                 } else if ((!node || !node.parentNode) && cbi_d_check(entry.deps)) {
  83                         if (!next) {
  84                                 parent.appendChild(entry.node);
  85                         } else {
  86                                 next.parentNode.insertBefore(entry.node, next);
  87                         }
  88                         state = (state || (node && node.parentNode))
  89                 }
  90         }
  91         if (state) {
  92                 cbi_d_update();
  93         }
  94 }
  95
  96 function cbi_bind(obj, type, callback, mode) {
  97         if (typeof mode == "undefined") {
  98                 mode = false;
  99         }
 100         if (!obj.addEventListener) {
 101                 ieCallback = function(){
 102                         var e = window.event;
 103                         if (!e.target && e.srcElement) {
 104                                 e.target = e.srcElement;
 105                         };
 106                         e.target['_eCB' + type + callback] = callback;
 107                         e.target['_eCB' + type + callback](e);
 108                         e.target['_eCB' + type + callback] = null;
 109                 };
 110                 obj.attachEvent('on' + type, ieCallback);
 111         } else {
 112                 obj.addEventListener(type, callback, mode);
 113         }
 114         return obj;
 115 }
 116
 117 function cbi_combobox(id, values, def, man) {
 118         var selid = "cbi.combobox." + id;
 119         if (document.getElementById(selid)) {
 120                 return
 121         }
 122
 123         var obj = document.getElementById(id)
 124         var sel = document.createElement("select");
 125         sel.id = selid;
 126         sel.className = 'cbi-input-select';
 127         if (obj.nextSibling) {
 128                 obj.parentNode.insertBefore(sel, obj.nextSibling);
 129         } else {
 130                 obj.parentNode.appendChild(sel);
 131         }
 132
 133         if (!values[obj.value]) {
 134                 if (obj.value == "") {
 135                         var optdef = document.createElement("option");
 136                         optdef.value = "";
 137                         optdef.appendChild(document.createTextNode(def));
 138                         sel.appendChild(optdef);
 139                 } else {
 140                         var opt = document.createElement("option");
 141                         opt.value = obj.value;
 142                         opt.selected = "selected";
 143                         opt.appendChild(document.createTextNode(obj.value));
 144                         sel.appendChild(opt);
 145                 }
 146         }
 147
 148         for (var i in values) {
 149                 var opt = document.createElement("option");
 150                 opt.value = i;
 151
 152                 if (obj.value == i) {
 153                         opt.selected = "selected";
 154                 }
 155
 156                 opt.appendChild(document.createTextNode(values[i]));
 157                 sel.appendChild(opt);
 158         }
 159
 160         var optman = document.createElement("option");
 161         optman.value = "";
 162         optman.appendChild(document.createTextNode(man));
 163         sel.appendChild(optman);
 164
 165         obj.style.display = "none";
 166
 167         cbi_bind(sel, "change", function() {
 168                 if (sel.selectedIndex == sel.options.length - 1) {
 169                         obj.style.display = "inline";
 170                         sel.parentNode.removeChild(sel);
 171                         obj.focus();
 172                 } else {
 173                         obj.value = sel.options[sel.selectedIndex].value;
 174                 }
 175         })
 176 }
 177
 178 function cbi_combobox_init(id, values, def, man) {
 179         var obj = document.getElementById(id);
 180         cbi_bind(obj, "blur", function() {
 181                 cbi_combobox(id, values, def, man)
 182         });
 183         cbi_combobox(id, values, def, man);
 184 }
 185
 186 function cbi_filebrowser(id, url, defpath) {
 187         var field   = document.getElementById(id);
 188         var browser = window.open(
 189                 url + ( field.value || defpath || '' ) + '?field=' + id,
 190                 "luci_filebrowser", "width=300,height=400,left=100,top=200,scrollbars=yes"
 191         );
 192
 193         browser.focus();
 194 }
 195
 196 //Hijacks the CBI form to send via XHR (requires Prototype)
 197 function cbi_hijack_forms(layer, win, fail, load) {
 198         layer.select('form').each(function(form) {
 199                 form.observe('submit', function(event) {
 200                         // Prevent the form from also submitting the regular way
 201                         event.stop();
 202
 203                         var form = event.element();
 204
 205                         if (load) {
 206                                 load();
 207                         }
 208
 209                         // Submit via XHR
 210                         form.request({
 211                                 onSuccess: win,
 212                                 onFailure: fail
 213                         });
 214                 });
 215         });
 216 }