diff options
| author | xue <> | 2005-12-05 01:00:16 +0000 |
|---|---|---|
| committer | xue <> | 2005-12-05 01:00:16 +0000 |
| commit | ccf76e430b7703db028966a845a966f50956f490 (patch) | |
| tree | 9762b746f8b7d432dbe5e5cb8f38f90007e0e1b5 /framework/Web/Javascripts/base/focus.js | |
| parent | 418baf36d477bcbdd6fb4eaf4037ea6a2d93f21c (diff) | |
Diffstat (limited to 'framework/Web/Javascripts/base/focus.js')
| -rw-r--r-- | framework/Web/Javascripts/base/focus.js | 99 |
1 files changed, 99 insertions, 0 deletions
diff --git a/framework/Web/Javascripts/base/focus.js b/framework/Web/Javascripts/base/focus.js new file mode 100644 index 00000000..6c1359cd --- /dev/null +++ b/framework/Web/Javascripts/base/focus.js @@ -0,0 +1,99 @@ +Prado.Focus = Class.create();
+
+Prado.Focus.setFocus = function(id)
+{
+ var target = document.getElementById ? document.getElementById(id) : document.all[id];
+ if(target && !Prado.Focus.canFocusOn(target))
+ {
+ target = Prado.Focus.findTarget(target);
+ }
+ if(target)
+ {
+ try
+ {
+ target.focus();
+ target.scrollIntoView(false);
+ if (window.__smartNav)
+ {
+ window.__smartNav.ae = target.id;
+ }
+ }
+ catch (e)
+ {
+ }
+ }
+}
+
+Prado.Focus.canFocusOn = function(element)
+{
+ if(!element || !(element.tagName))
+ return false;
+ var tagName = element.tagName.toLowerCase();
+ return !element.disabled && (!element.type || element.type.toLowerCase() != "hidden") && Prado.Focus.isFocusableTag(tagName) && Prado.Focus.isVisible(element);
+}
+
+Prado.Focus.isFocusableTag = function(tagName)
+{
+ return (tagName == "input" || tagName == "textarea" || tagName == "select" || tagName == "button" || tagName == "a");
+}
+
+
+Prado.Focus.findTarget = function(element)
+{
+ if(!element || !(element.tagName))
+ {
+ return null;
+ }
+ var tagName = element.tagName.toLowerCase();
+ if (tagName == "undefined")
+ {
+ return null;
+ }
+ var children = element.childNodes;
+ if (children)
+ {
+ for(var i=0;i<children.length;i++)
+ {
+ try
+ {
+ if(Prado.Focus.canFocusOn(children[i]))
+ {
+ return children[i];
+ }
+ else
+ {
+ var target = Prado.Focus.findTarget(children[i]);
+ if(target)
+ {
+ return target;
+ }
+ }
+ }
+ catch (e)
+ {
+ }
+ }
+ }
+ return null;
+}
+
+Prado.Focus.isVisible = function(element)
+{
+ var current = element;
+ while((typeof(current) != "undefined") && (current != null))
+ {
+ if(current.disabled || (typeof(current.style) != "undefined" && ((typeof(current.style.display) != "undefined" && current.style.display == "none") || (typeof(current.style.visibility) != "undefined" && current.style.visibility == "hidden") )))
+ {
+ return false;
+ }
+ if(typeof(current.parentNode) != "undefined" && current.parentNode != null && current.parentNode != current && current.parentNode.tagName.toLowerCase() != "body")
+ {
+ current = current.parentNode;
+ }
+ else
+ {
+ return true;
+ }
+ }
+ return true;
+}
|