mcs/class/System.Web/resources/webform.js

   1 /*
   2  * WebForm.js
   3  *
   4  * Authors:
   5  *   Chris Toshok (toshok@ximian.com)
   6  *   Lluis Sanchez Gual (lluis@novell.com)
   7  *   Igor Zelmanovich (igorz@mainsoft.com)
   8  *
   9  * (c) 2005 Novell, Inc. (http://www.novell.com)
  10  *
  11  * Permission is hereby granted, free of charge, to any person obtaining
  12  * a copy of this software and associated documentation files (the
  13  * "Software"), to deal in the Software without restriction, including
  14  * without limitation the rights to use, copy, modify, merge, publish,
  15  * distribute, sublicense, and/or sell copies of the Software, and to
  16  * permit persons to whom the Software is furnished to do so, subject to
  17  * the following conditions:
  18  *
  19  * The above copyright notice and this permission notice shall be
  20  * included in all copies or substantial portions of the Software.
  21  *
  22  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  23  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  24  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  25  * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
  26  * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  27  * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  28  * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  29  */
  30
  31
  32 function WebForm_AutoFocus (id)
  33 {
  34         var x = WebForm_GetElementById (id);
  35
  36         if (x && (!WebForm_CanFocus(x))) {
  37                 x = WebForm_FindFirstFocusableChild(x);
  38         }
  39         if (x) { x.focus(); }
  40 }
  41
  42 function WebForm_CanFocus(element) {
  43         if (!element || !(element.tagName) || element.disabled) {
  44                 return false;
  45         }
  46         if (element.type && element.type.toLowerCase() == "hidden") {
  47                 return false;
  48         }
  49         var tagName = element.tagName.toLowerCase();
  50         return (tagName == "input" ||
  51                         tagName == "textarea" ||
  52                         tagName == "select" ||
  53                         tagName == "button" ||
  54                         tagName == "a");
  55 }
  56
  57 function WebForm_FindFirstFocusableChild(element) {
  58         if (!element || !(element.tagName)) {
  59                 return null;
  60         }
  61         var tagName = element.tagName.toLowerCase();
  62         if (tagName == "undefined") {
  63                 return null;
  64         }
  65         var children = element.childNodes;
  66         if (children) {
  67                 for (var i = 0; i < children.length; i++) {
  68                         try {
  69                                 if (WebForm_CanFocus(children[i])) {
  70                                         return children[i];
  71                                 }
  72                                 else {
  73                                         var focused = WebForm_FindFirstFocusableChild(children[i]);
  74                                         if (WebForm_CanFocus(focused)) {
  75                                                 return focused;
  76                                         }
  77                                 }
  78                         } catch (e) {
  79                         }
  80                 }
  81         }
  82         return null;
  83 }
  84
  85 function WebForm_ReEnableControls (currForm)
  86 {
  87         if (typeof(currForm.__enabledControlArray) != 'undefined' && currForm.__enabledControlArray != null)
  88                 __enabledControlArray = currForm.__enabledControlArray;
  89
  90         if (typeof(__enabledControlArray) == 'undefined' || __enabledControlArray == null)
  91                 return false;
  92
  93         currForm.__disabledControlArray = new Array();
  94         for (var i = 0; i < __enabledControlArray.length; i++) {
  95                 var c = document.getElementById(__enabledControlArray[i]);
  96                 if ((typeof(c) != "undefined") && (c != null) && (c.disabled == true)) {
  97                         c.disabled = false;
  98                         currForm.__disabledControlArray[currForm.__disabledControlArray.length] = c;
  99                 }
 100         }
 101         __currForm = currForm
 102         setTimeout("WebForm_ReDisableControls (__currForm)", 0);
 103         return true;
 104 }
 105
 106 function WebForm_ReDisableControls (currForm)
 107 {
 108         for (var i = 0; i < currForm.__disabledControlArray.length; i++) {
 109                 currForm.__disabledControlArray[i].disabled = true;
 110         }
 111 }
 112
 113 // This function is only used in the context of TARGET_J2EE for portlets
 114 function PortalWebForm_DoPostback (id, par, url, apb, pval, tf, csubm, vg, currForm)
 115 {
 116         if (url != null) {
 117                 currForm = WebForm_GetFormFromCtrl (id, currForm);
 118                 if (url.indexOf ("vmw.action.page=") == 0) {
 119                         currForm.__NEXTVMWACTIONPAGE.value = url.substring ("vmw.action.page=".length);
 120                         url = currForm.action;
 121                 }
 122                 else if (url.indexOf ("vmw.render.page=") == 0)
 123                 {
 124                         currForm.__NEXTVMWRENDERPAGE.value = url.substring ("vmw.render.page=".length);
 125                         currForm.submit ();
 126                         return;
 127                 }
 128         }
 129         return WebForm_DoPostback (id, par, url, apb, pval, tf, csubm, vg, currForm);
 130 }
 131 function WebForm_DoPostback (id, par, url, apb, pval, tf, csubm, vg, currForm)
 132 {
 133         currForm = WebForm_GetFormFromCtrl (id, currForm);
 134
 135         if (typeof(SetValidatorContext) == "function")
 136                 SetValidatorContext (currForm);
 137
 138         var validationResult = true;
 139         if (pval && typeof(Page_ClientValidate) == "function")
 140                 validationResult =  Page_ClientValidate(vg);
 141
 142         if (validationResult && url != null)
 143                 currForm.action = url;
 144
 145         if (csubm)
 146                 currForm.__doPostBack (id, par);
 147 }
 148
 149 function WebForm_DoCallback (id, arg, callback, ctx, errorCallback, currForm)
 150 {
 151         currForm = WebForm_GetFormFromCtrl (id, currForm);
 152         var qs = WebForm_getFormData (currForm) + "__CALLBACKTARGET=" + id + "&__CALLBACKARGUMENT=" + encodeURIComponent(arg);
 153         if (currForm["__EVENTVALIDATION"]) qs += "&__EVENTVALIDATION=" + encodeURIComponent(currForm["__EVENTVALIDATION"].value);
 154         WebForm_httpPost (currForm.serverURL || document.URL, qs, function (httpPost) { WebForm_ClientCallback (httpPost, ctx, callback, errorCallback, currForm); });
 155 }
 156
 157 function WebForm_ClientCallback (httpPost, ctx, callback, errorCallback, currForm)
 158 {
 159         var doc = httpPost.responseText;
 160         if (doc.charAt(0) == "e") {
 161                 if ((typeof(errorCallback) != "undefined") && (errorCallback != null))
 162                         errorCallback(doc.substring(1), ctx);
 163         } else {
 164                 var separatorIndex = doc.indexOf("|");
 165                 if (separatorIndex != -1) {
 166                         var validationFieldLength = parseInt(doc.substring(0, separatorIndex));
 167                         if (!isNaN(validationFieldLength)) {
 168                                 var validationField = doc.substring(separatorIndex + 1, separatorIndex + validationFieldLength + 1);
 169                                 if (validationField != "") {
 170                                         var validationFieldElement = currForm["__EVENTVALIDATION"];
 171                                         if (!validationFieldElement) {
 172                                                 validationFieldElement = document.createElement("INPUT");
 173                                                 validationFieldElement.type = "hidden";
 174                                                 validationFieldElement.name = "__EVENTVALIDATION";
 175                                                 currForm.appendChild(validationFieldElement);
 176                                         }
 177                                         validationFieldElement.value = validationField;
 178                                 }
 179                                 if ((typeof(callback) != "undefined") && (callback != null))
 180                                         callback (doc.substring(separatorIndex + validationFieldLength + 1), ctx);
 181                         }
 182                 } else {
 183                         if ((typeof(callback) != "undefined") && (callback != null))
 184                                 callback (doc, ctx);
 185                 }
 186         }
 187 }
 188
 189 function WebForm_getFormData (currForm)
 190 {
 191         var qs = "";
 192         var len = currForm.elements.length;
 193         for (n=0; n<len; n++) {
 194                 var elem = currForm.elements [n];
 195                 var tagName = elem.tagName.toLowerCase();
 196                 if (tagName == "input") {
 197                         var type = elem.type;
 198                         if ((type == "text" || type == "hidden" || type == "password" ||
 199                                 ((type == "checkbox" || type == "radio") && elem.checked)) &&
 200                                 (elem.id != "__EVENTVALIDATION")) {
 201                                 qs += elem.name + "=" + encodeURIComponent (elem.value) + "&";
 202                         }
 203                 }
 204                 else if (tagName == "select") {
 205                         var selectCount = elem.options.length;
 206                         for (var j = 0; j < selectCount; j++) {
 207                                 var selectChild = elem.options[j];
 208                                 if (selectChild.selected == true) {
 209                                         qs += elem.name + "=" + encodeURIComponent (elem.value) + "&";
 210                                 }
 211                         }
 212                 }
 213                 else if (tagName == "textarea") {
 214                         qs += elem.name + "=" + encodeURIComponent (elem.value) + "&";
 215                 }
 216         }
 217         return qs;
 218 }
 219
 220 var axName = null;
 221 function WebForm_httpPost (url, data, callback)
 222 {
 223         var httpPost = null;
 224
 225         if (typeof XMLHttpRequest != "undefined") {
 226                 httpPost = new XMLHttpRequest ();
 227         } else {
 228                 if (axName != null)
 229                         httpPost = new ActiveXObject (axName);
 230                 else {
 231                         var clsnames = new Array ("MSXML", "MSXML2", "MSXML3", "Microsoft");
 232                         for (n = 0; n < clsnames.length && httpPost == null; n++) {
 233                                 axName = clsnames [n] + ".XMLHTTP";
 234                                 try {
 235                                         httpPost = new ActiveXObject (axName);
 236                                 } catch (e) { axName = null; }
 237                         }
 238                         if (httpPost == null)
 239                                 throw new Error ("XMLHTTP object could not be created.");
 240                 }
 241         }
 242         httpPost.onreadystatechange = function () { if (httpPost.readyState == 4) callback (httpPost); };
 243
 244         httpPost.open ("POST", url, true);      // async
 245         httpPost.setRequestHeader ("Content-Type", "application/x-www-form-urlencoded");
 246         setTimeout (function () { httpPost.send (data); }, 10);
 247 }
 248
 249 function WebForm_GetFormFromCtrl (id, currForm)
 250 {
 251         if (currForm)
 252                 return currForm;
 253
 254         // We need to translate the id from ASPX UniqueID to its ClientID.
 255         var ctrl = WebForm_GetElementById (id.replace(/\$/g, "_"));
 256         while (ctrl != null) {
 257                 if (ctrl.isAspForm)
 258                         return ctrl;
 259                 ctrl = ctrl.parentNode;
 260         }
 261         return theForm;
 262 }
 263
 264 function WebForm_GetElementById (id)
 265 {
 266         return document.getElementById ? document.getElementById (id) :
 267                document.all ? document.all [id] :
 268                    document [id];
 269 }
 270
 271 function WebForm_FireDefaultButton(event, target)
 272 {
 273         if (event.keyCode != 13) {
 274                 return true;
 275         }
 276         if(event.srcElement && (event.srcElement.tagName.toLowerCase() == "textarea")) {
 277                 return true;
 278         }
 279         var defaultButton = WebForm_GetElementById(target);
 280         if (defaultButton && typeof(defaultButton.click) != "undefined") {
 281                 defaultButton.click();
 282                 event.cancelBubble = true;
 283                 return false;
 284         }
 285         return true;
 286 }
 287
 288 function WebForm_SaveScrollPositionSubmit() {
 289     this.elements['__SCROLLPOSITIONX'].value = WebForm_GetScrollX();
 290     this.elements['__SCROLLPOSITIONY'].value = WebForm_GetScrollY();
 291     if ((typeof(this.oldSubmit) != "undefined") && (this.oldSubmit != null)) {
 292         return this.oldSubmit();
 293     }
 294     return true;
 295 }
 296
 297 function WebForm_SaveScrollPositionOnSubmit() {
 298     this.elements['__SCROLLPOSITIONX'].value = WebForm_GetScrollX();
 299     this.elements['__SCROLLPOSITIONY'].value = WebForm_GetScrollY();
 300     if ((typeof(this.oldOnSubmit) != "undefined") && (this.oldOnSubmit != null)) {
 301         return this.oldOnSubmit();
 302     }
 303     return true;
 304 }
 305
 306 function WebForm_RestoreScrollPosition(currForm) {
 307         currForm = currForm || theForm;
 308         var ScrollX = currForm.elements['__SCROLLPOSITIONX'].value;
 309         var ScrollY = currForm.elements['__SCROLLPOSITIONY'].value;
 310         if (ScrollX != "" || ScrollY != "")
 311         window.scrollTo(ScrollX, ScrollY);
 312     if ((typeof(this.oldOnLoad) != "undefined") && (this.oldOnLoad != null)) {
 313         return this.oldOnLoad();
 314     }
 315     return true;
 316 }
 317
 318 function WebForm_GetScrollX() {
 319     if (window.pageXOffset) {
 320         return window.pageXOffset;
 321     }
 322     else if (document.documentElement && document.documentElement.scrollLeft) {
 323         return document.documentElement.scrollLeft;
 324     }
 325     else if (document.body) {
 326         return document.body.scrollLeft;
 327     }
 328     return 0;
 329 }
 330
 331 function WebForm_GetScrollY() {
 332     if (window.pageYOffset) {
 333         return window.pageYOffset;
 334     }
 335     else if (document.documentElement && document.documentElement.scrollTop) {
 336         return document.documentElement.scrollTop;
 337     }
 338     else if (document.body) {
 339         return document.body.scrollTop;
 340     }
 341     return 0;
 342 }
 343
 344