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Bug 902942 - Deleting focused element doesn't update forms.js focusedElement. r=yxl

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This commit is contained in:
Jan Jongboom 2013-08-21 08:24:25 -04:00
parent 421f950403
commit 68ac8001de
1 changed files with 25 additions and 0 deletions
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25
b2g/chrome/content/forms.js
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@ -212,6 +212,7 @@ let FormAssistant = {
scrollIntoViewTimeout: null,
_focusedElement: null,
_focusCounter: 0, // up one for every time we focus a new element
_observer: null,
_documentEncoder: null,
_editor: null,
_editing: false,
@ -230,12 +231,18 @@ let FormAssistant = {
},
setFocusedElement: function fa_setFocusedElement(element) {
let self = this;
if (element === this.focusedElement)
return;
if (this.focusedElement) {
this.focusedElement.removeEventListener('mousedown', this);
this.focusedElement.removeEventListener('mouseup', this);
if (this._observer) {
this._observer.disconnect();
this._observer = null;
}
if (!element) {
this.focusedElement.blur();
}
@ -265,6 +272,24 @@ let FormAssistant = {
// element.
this._editor.addEditorObserver(this);
}
// If our focusedElement is removed from DOM we want to handle it properly
let MutationObserver = element.ownerDocument.defaultView.MutationObserver;
this._observer = new MutationObserver(function(mutations) {
var del = [].some.call(mutations, function(m) {
return [].some.call(m.removedNodes, function(n) {
return n === element;
});
});
if (del && element === this.focusedElement) {
// item was deleted, fake a blur so all state gets set correctly
self.handleEvent({ target: element, type: "blur" });
}
});
this._observer.observe(element.parentNode, {
childList: true
});
}
this.focusedElement = element;