gecko/mobile/android/chrome/content/SelectHelper.js

133 lines
3.8 KiB
JavaScript

/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this file,
* You can obtain one at http://mozilla.org/MPL/2.0/. */
"use strict";
var SelectHelper = {
_uiBusy: false,
handleEvent: function(aEvent) {
this.handleClick(aEvent.target);
},
handleClick: function(aTarget) {
// if we're busy looking at a select we want to eat any clicks that
// come to us, but not to process them
if (this._uiBusy || !this._isMenu(aTarget))
return;
this._uiBusy = true;
this.show(aTarget);
this._uiBusy = false;
},
show: function(aElement) {
let list = this.getListForElement(aElement);
let data = JSON.parse(sendMessageToJava({ gecko: list }));
let selected = data.button;
if (selected == -1)
return;
if (aElement instanceof Ci.nsIDOMXULMenuListElement) {
aElement.selectedIndex = selected;
} else if (aElement instanceof HTMLSelectElement) {
if (!(selected instanceof Array)) {
let temp = [];
for (let i = 0; i < list.listitems.length; i++) {
temp[i] = (i == selected);
}
selected = temp;
}
let i = 0;
this.forOptions(aElement, function(aNode) {
aNode.selected = selected[i++];
});
}
this.fireOnChange(aElement);
},
_isMenu: function(aElement) {
return (aElement instanceof HTMLSelectElement ||
aElement instanceof Ci.nsIDOMXULMenuListElement);
},
getListForElement: function(aElement) {
let result = {
type: "Prompt:Show",
multiple: aElement.multiple,
selected: [],
listitems: []
};
if (aElement.multiple) {
result.buttons = [
{ label: Strings.browser.GetStringFromName("selectHelper.closeMultipleSelectDialog") },
];
}
let index = 0;
this.forOptions(aElement, function(aNode, aOptions) {
let item = {
label: aNode.text || aNode.label,
isGroup: aOptions.isGroup,
inGroup: aOptions.inGroup,
disabled: aNode.disabled,
id: index
}
if (aOptions.inGroup)
item.disabled = item.disabled || aNode.parentNode.disabled;
result.listitems[index] = item;
result.selected[index] = aNode.selected;
index++;
});
return result;
},
forOptions: function(aElement, aFunction) {
let parent = aElement;
if (aElement instanceof Ci.nsIDOMXULMenuListElement)
parent = aElement.menupopup;
let children = parent.children;
let numChildren = children.length;
// if there are no children in this select, we add a dummy row so that at least something appears
if (numChildren == 0)
aFunction.call(this, { label: "" }, { isGroup: false, inGroup: false });
for (let i = 0; i < numChildren; i++) {
let child = children[i];
if (child instanceof HTMLOptionElement ||
child instanceof Ci.nsIDOMXULSelectControlItemElement) {
// This is a regular choice under no group.
aFunction.call(this, child, {
isGroup: false, inGroup: false
});
} else if (child instanceof HTMLOptGroupElement) {
aFunction.call(this, child, {
isGroup: true, inGroup: false
});
let subchildren = child.children;
let numSubchildren = subchildren.length;
for (let j = 0; j < numSubchildren; j++) {
let subchild = subchildren[j];
aFunction.call(this, subchild, {
isGroup: false, inGroup: true
});
}
}
}
},
fireOnChange: function(aElement) {
let evt = aElement.ownerDocument.createEvent("Events");
evt.initEvent("change", true, true, aElement.defaultView, 0,
false, false,
false, false, null);
setTimeout(function() {
aElement.dispatchEvent(evt);
}, 0);
}
};