0.6.x/js/01_core/18_FocusUtility.js

   1
   2
   3 var FocusUtility_lastElmFocused;
   4 var FocusUtility_docActiveElmSupport = X_UA[ 'IE' ] || document.activeElement !== undefined;
   5 var FocusUtility_fixActiveElm;
   6
   7 // http://www.codingforums.com/javascript-programming/19503-determining-focus-ns6-ie6-context-sensitive-help.html
   8 // https://developer.mozilla.org/ja/docs/Web/API/Document/activeElement
   9 // IE 4+, Chrome 2+, Safari 4+, Firefox 3+ Opera 9.6+
  10
  11 function FocusUtility_getFocusedElement(){
  12         return FocusUtility_fixActiveElm ||
  13                 (
  14                         X_Script_gte15 ?
  15                                 X_Script_try( X_Object_find, [ document, 'activeElement' ] ) :
  16                                 // ieは iframe 内で focus がない場合に activeElement に触ると エラーになる
  17                                 // VBS 経由で activeElement に触り安全確認する
  18                                 ( window[ 'vbs_testAE' ]() && document.activeElement )
  19                 );
  20 };
  21
  22 /*
  23  * 通常の focus は xnode.call('focus') を使う.
  24  * フレームワーク内部で API の実行のために一時的に focus を当てたい場合に使う.focus の復帰は自動で行われる
  25  */
  26 function FocusUtility_setTemporarilyFocus( elm ){
  27         var elmActive = FocusUtility_getFocusedElement();
  28
  29         if( elmActive !== elm ){
  30                 X_EventDispatcher_ignoreActualEvent = true; // ignoreAllEvent focus, blur
  31                 elm.focus();
  32                 X_EventDispatcher_ignoreActualEvent = false;
  33                 if( !FocusUtility_lastElmFocused ){
  34                         FocusUtility_lastElmFocused = elmActive;
  35                         // ie5(IE11のエミュレーション) でしばしば空なんですけど...
  36                         elmActive && ExecuteAtEnd_add( FocusUtility_restoreFocus );
  37                 };
  38         };
  39 };
  40
  41 // こっそり復帰
  42 function FocusUtility_restoreFocus(){
  43         var elmActive = FocusUtility_getFocusedElement(),
  44                 elm = FocusUtility_lastElmFocused;
  45
  46         if( elmActive !== elm ){
  47                 X_EventDispatcher_ignoreActualEvent = true;
  48                 elm.focus();
  49                 X_EventDispatcher_ignoreActualEvent = false;
  50         };
  51         FocusUtility_lastElmFocused = null;
  52 };
  53