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 function WebForm_Initialize(webForm) {
  32
  33 webForm.__pendingCallbacks = new Array();
  34
  35 webForm.WebForm_AutoFocus = function (id)
  36 {
  37         var x = this.WebForm_GetElementById (id);
  38
  39         if (x && (!this.WebForm_CanFocus(x))) {
  40                 x = this.WebForm_FindFirstFocusableChild(x);
  41         }
  42         if (x) { x.focus(); }
  43 }
  44
  45 webForm.WebForm_CanFocus = function (element) {
  46         if (!element || !(element.tagName) || element.disabled) {
  47                 return false;
  48         }
  49         if (element.type && element.type.toLowerCase() == "hidden") {
  50                 return false;
  51         }
  52         var tagName = element.tagName.toLowerCase();
  53         return (tagName == "input" ||
  54                         tagName == "textarea" ||
  55                         tagName == "select" ||
  56                         tagName == "button" ||
  57                         tagName == "a");
  58 }
  59
  60 webForm.WebForm_FindFirstFocusableChild = function (element) {
  61         if (!element || !(element.tagName)) {
  62                 return null;
  63         }
  64         var tagName = element.tagName.toLowerCase();
  65         if (tagName == "undefined") {
  66                 return null;
  67         }
  68         var children = element.childNodes;
  69         if (children) {
  70                 for (var i = 0; i < children.length; i++) {
  71                         try {
  72                                 if (this.WebForm_CanFocus(children[i])) {
  73                                         return children[i];
  74                                 }
  75                                 else {
  76                                         var focused = this.WebForm_FindFirstFocusableChild(children[i]);
  77                                         if (this.WebForm_CanFocus(focused)) {
  78                                                 return focused;
  79                                         }
  80                                 }
  81                         } catch (e) {
  82                         }
  83                 }
  84         }
  85         return null;
  86 }
  87
  88 webForm.WebForm_ReEnableControls = function  ()
  89 {
  90         if (typeof(this._form.__enabledControlArray) != 'undefined' && this._form.__enabledControlArray != null)
  91                 __enabledControlArray = this._form.__enabledControlArray;
  92
  93         if (typeof(__enabledControlArray) == 'undefined' || __enabledControlArray == null)
  94                 return false;
  95
  96         this._form.__disabledControlArray = new Array();
  97         for (var i = 0; i < __enabledControlArray.length; i++) {
  98                 var c = this.WebForm_GetElementById (__enabledControlArray[i]);
  99                 if ((typeof(c) != "undefined") && (c != null) && (c.disabled == true)) {
 100                         c.disabled = false;
 101                         this._form.__disabledControlArray[this._form.__disabledControlArray.length] = c;
 102                 }
 103         }
 104         setTimeout((this._instanceVariableName ? this._instanceVariableName + "." : "") + "WebForm_ReDisableControls ()", 0);
 105         return true;
 106 }
 107
 108 webForm.WebForm_ReDisableControls = function  ()
 109 {
 110         for (var i = 0; i < this._form.__disabledControlArray.length; i++) {
 111                 this._form.__disabledControlArray[i].disabled = true;
 112         }
 113 }
 114
 115 webForm.WebForm_DoPostback = function  (id, par, url, apb, pval, tf, csubm, vg)
 116 {
 117         var validationResult = true;
 118         if (pval && typeof(this.Page_ClientValidate) == "function")
 119                 validationResult =  this.Page_ClientValidate(vg);
 120
 121         if (validationResult) {
 122                 if ((typeof(url) != "undefined") && (url != null) && (url.length > 0))
 123                         this._form.action = url;
 124                 if (tf) {
 125                         var lastFocus = this._form.elements["__LASTFOCUS"];
 126                         if ((typeof(lastFocus) != "undefined") && (lastFocus != null))
 127                                 lastFocus.value = id;
 128                 }
 129         }
 130         if (csubm)
 131                 this.__doPostBack (id, par);
 132 }
 133
 134 webForm.WebForm_DoCallback = function (id, arg, callback, ctx, errorCallback, useAsync)
 135 {
 136         var qs = webForm.WebForm_getFormData () + "__CALLBACKTARGET=" + id + "&__CALLBACKARGUMENT=" + encodeURIComponent(arg);
 137
 138   if (webForm._form["__EVENTVALIDATION"])
 139     qs += "&__EVENTVALIDATION=" + encodeURIComponent(webForm._form["__EVENTVALIDATION"].value);
 140
 141         webForm.WebForm_httpPost (webForm._form.serverURL || document.URL, qs, function (httpPost) { webForm.WebForm_ClientCallback (httpPost, ctx, callback, errorCallback); });
 142 }
 143
 144 webForm.WebForm_ClientCallback = function (httpPost, ctx, callback, errorCallback)
 145 {
 146         var doc = httpPost.responseText;
 147         if (doc.charAt(0) == "e") {
 148                 if ((typeof(errorCallback) != "undefined") && (errorCallback != null))
 149                         errorCallback(doc.substring(1), ctx);
 150         } else {
 151                 var separatorIndex = doc.indexOf("|");
 152                 if (separatorIndex != -1) {
 153                         var validationFieldLength = parseInt(doc.substring(0, separatorIndex));
 154                         if (!isNaN(validationFieldLength)) {
 155                                 var validationField = doc.substring(separatorIndex + 1, separatorIndex + validationFieldLength + 1);
 156                                 if (validationField != "") {
 157                                         var validationFieldElement = this._form["__EVENTVALIDATION"];
 158                                         if (!validationFieldElement) {
 159                                                 validationFieldElement = document.createElement("INPUT");
 160                                                 validationFieldElement.type = "hidden";
 161                                                 validationFieldElement.name = "__EVENTVALIDATION";
 162                                                 validationFieldElement.id = validationFieldElement.name;
 163                                                 this._form.appendChild(validationFieldElement);
 164                                         }
 165                                         validationFieldElement.value = validationField;
 166                                 }
 167                                 if ((typeof(callback) != "undefined") && (callback != null))
 168                                         callback (doc.substring(separatorIndex + validationFieldLength + 1), ctx);
 169                         }
 170                 } else {
 171                         if ((typeof(callback) != "undefined") && (callback != null))
 172                                 callback (doc, ctx);
 173                 }
 174         }
 175 }
 176
 177 webForm.WebForm_getFormData = function ()
 178 {
 179         var qs = "";
 180         var len = this._form.elements.length;
 181         for (n=0; n<len; n++) {
 182                 var elem = this._form.elements [n];
 183                 var tagName = elem.tagName.toLowerCase();
 184                 if (tagName == "input") {
 185                         var type = elem.type;
 186                         if ((type == "text" || type == "hidden" || type == "password" ||
 187                                 ((type == "checkbox" || type == "radio") && elem.checked)) &&
 188           (elem.id != "__EVENTVALIDATION")) {
 189                                 qs += elem.name + "=" + encodeURIComponent (elem.value) + "&";
 190                         }
 191                 } else if (tagName == "select") {
 192                         var selectCount = elem.options.length;
 193                         for (var j = 0; j < selectCount; j++) {
 194                                 var selectChild = elem.options[j];
 195                                 if (selectChild.selected == true) {
 196                                         qs += elem.name + "=" + encodeURIComponent (elem.value) + "&";
 197                                 }
 198                         }
 199                 }
 200                 else if (tagName == "textarea") {
 201                         qs += elem.name + "=" + encodeURIComponent (elem.value) + "&";
 202                 }
 203         }
 204         return qs;
 205 }
 206
 207 webForm.WebForm_httpPost = function (url, data, callback)
 208 {
 209         var httpPost = null;
 210
 211         if (typeof XMLHttpRequest != "undefined") {
 212                 httpPost = new XMLHttpRequest ();
 213         } else {
 214                 if (this.axName != null)
 215                         httpPost = new ActiveXObject (this.axName);
 216                 else {
 217                         var clsnames = new Array ("MSXML", "MSXML2", "MSXML3", "Microsoft");
 218                         for (n = 0; n < clsnames.length && httpPost == null; n++) {
 219                                 this.axName = clsnames [n] + ".XMLHTTP";
 220                                 try {
 221                                         httpPost = new ActiveXObject (this.axName);
 222                                 } catch (e) { this.axName = null; }
 223                         }
 224                         if (httpPost == null)
 225                                 throw new Error ("XMLHTTP object could not be created.");
 226                 }
 227         }
 228         httpPost.onreadystatechange = function () { if (httpPost.readyState == 4) callback (httpPost); };
 229
 230         httpPost.open ("POST", url, true);      // async
 231         httpPost.setRequestHeader ("Content-Type", "application/x-www-form-urlencoded");
 232         setTimeout (function () { httpPost.send (data); }, 10);
 233 }
 234
 235 webForm.WebForm_GetElementById = function (id)
 236 {
 237         return document.getElementById ? document.getElementById (id) :
 238                document.all ? document.all [id] :
 239                    document [id];
 240 }
 241
 242 webForm.WebForm_FireDefaultButton = function (event, target)
 243 {
 244         if (event.keyCode != 13) {
 245                 return true;
 246         }
 247         if(event.srcElement && (event.srcElement.tagName.toLowerCase() == "textarea")) {
 248                 return true;
 249         }
 250         var defaultButton = this.WebForm_GetElementById(target);
 251         if (!defaultButton)
 252                 return true;
 253
 254         if (typeof(defaultButton.click) != "undefined") {
 255                 defaultButton.click();
 256                 event.cancelBubble = true;
 257                 return false;
 258         }
 259
 260         if (defaultButton.href && defaultButton.href.match(/^javascript:/i)) {
 261                 var jsCode = defaultButton.href.match(/^javascript:(.*)/i)[1];
 262                 eval(jsCode);
 263                 event.cancelBubble = true;
 264                 return false;
 265         }
 266
 267         return true;
 268 }
 269
 270 webForm.WebForm_SaveScrollPositionSubmit = function ()
 271 {
 272         var pos = this.WebForm_GetElementPosition(this._form);
 273         this._form.elements['__SCROLLPOSITIONX'].value = this.WebForm_GetScrollX() - pos.x;
 274         this._form.elements['__SCROLLPOSITIONY'].value = this.WebForm_GetScrollY() - pos.y;
 275         if ((typeof(this._form.oldSubmit) != "undefined") && (this._form.oldSubmit != null)) {
 276                 return this._form.oldSubmit();
 277         }
 278         return true;
 279 }
 280
 281 webForm.WebForm_SaveScrollPositionOnSubmit = function ()
 282 {
 283         var pos = this.WebForm_GetElementPosition(this._form);
 284         this._form.elements['__SCROLLPOSITIONX'].value = this.WebForm_GetScrollX() - pos.x;
 285         this._form.elements['__SCROLLPOSITIONY'].value = this.WebForm_GetScrollY() - pos.y;
 286         if ((typeof(this._form.oldOnSubmit) != "undefined") && (this._form.oldOnSubmit != null)) {
 287                 return this._form.oldOnSubmit();
 288         }
 289         return true;
 290 }
 291
 292 webForm.WebForm_RestoreScrollPosition = function ()
 293 {
 294         var pos = this.WebForm_GetElementPosition(this._form);
 295         var ScrollX = parseInt(this._form.elements['__SCROLLPOSITIONX'].value);
 296         var ScrollY = parseInt(this._form.elements['__SCROLLPOSITIONY'].value);
 297         ScrollX = (isNaN(ScrollX)) ? pos.x : (ScrollX + pos.x);
 298         ScrollY = (isNaN(ScrollY)) ? pos.y : (ScrollY + pos.y);
 299         window.scrollTo(ScrollX, ScrollY);
 300         if ((typeof(this._form.oldOnLoad) != "undefined") && (this._form.oldOnLoad != null)) {
 301                 return this._form.oldOnLoad();
 302         }
 303         return true;
 304 }
 305
 306 webForm.WebForm_GetScrollX = function () {
 307     if (window.pageXOffset) {
 308         return window.pageXOffset;
 309     }
 310     else if (document.documentElement && document.documentElement.scrollLeft) {
 311         return document.documentElement.scrollLeft;
 312     }
 313     else if (document.body) {
 314         return document.body.scrollLeft;
 315     }
 316     return 0;
 317 }
 318
 319 webForm.WebForm_GetScrollY = function () {
 320     if (window.pageYOffset) {
 321         return window.pageYOffset;
 322     }
 323     else if (document.documentElement && document.documentElement.scrollTop) {
 324         return document.documentElement.scrollTop;
 325     }
 326     else if (document.body) {
 327         return document.body.scrollTop;
 328     }
 329     return 0;
 330 }
 331
 332 webForm.WebForm_GetElementPosition = function (element)
 333 {
 334         var result = new Object();
 335         result.x = 0;
 336         result.y = 0;
 337         result.width = 0;
 338         result.height = 0;
 339         result.x = element.offsetLeft;
 340         result.y = element.offsetTop;
 341         var parent = element.offsetParent;
 342         while (parent) {
 343                 result.x += parent.offsetLeft;
 344                 result.y += parent.offsetTop;
 345                 parent = parent.offsetParent;
 346         }
 347         result.width = element.offsetWidth;
 348         result.height = element.offsetHeight;
 349         return result;
 350 }
 351 }
 352