pandora/static/js/pandora/UI.js
2012-01-09 15:25:52 +05:30

194 lines
7.5 KiB
JavaScript

// vim: et:ts=4:sw=4:sts=4:ft=javascript
pandora.UI = (function() {
var self = {}, that = {};
self.previousUI = {};
that.encode = function(val) {
return val.replace(/\./g, '\\.');
};
that.getPrevious = function(key) {
// fixme: probably unneeded by now
return !key ? self.previousUI : self.previousUI[key];
};
that.reset = function() {
pandora.user.ui = pandora.site.user.ui;
pandora.user.ui._list = pandora.getListState(pandora.user.ui.find);
pandora.user.ui._filterState = pandora.getFilterState(pandora.user.ui.find);
pandora.user.ui._findState = pandora.getFindState(pandora.user.ui.find);
};
// sets pandora.user.ui.key to val
// key foo.bar.baz sets pandora.user.ui.foo.bar.baz
// val null removes a key
that.set = function(/* {key: val}[, flag] or key, val[, flag] */) {
var add = {},
args,
item,
list,
listSettings = pandora.site.listSettings,
listView,
set = {},
trigger = {},
triggerEvents;
if (Ox.isObject(arguments[0])) {
args = arguments[0];
triggerEvents = Ox.isUndefined(arguments[1]) ? true : arguments[1];
} else {
args = Ox.makeObject([arguments[0], arguments[1]]);
triggerEvents = Ox.isUndefined(arguments[2]) ? true : arguments[1];
}
Ox.Log('UI', 'SET', args)
self.previousUI = Ox.clone(pandora.user.ui, true);
self.previousUI._list = pandora.getListState(self.previousUI.find);
if ('find' in args) {
// the challenge here is that find may change list,
// and list may then change listSort and listView,
// which we don't want to trigger, since find triggers
// (values we put in add will be changed, but won't trigger)
list = pandora.getListState(args.find);
pandora.user.ui._list = list;
pandora.user.ui._filterState = pandora.getFilterState(args.find);
pandora.user.ui._findState = pandora.getFindState(args.find);
if (pandora.$ui.appPanel) {
// if we're not on page load,
// switch from item view to list view
args['item'] = '';
}
add.itemFind = pandora.site.user.ui.itemFind;
if (list != self.previousUI._list) {
Ox.Log('UI', 'FIND HAS CHANGED LIST')
// if find has changed list
Ox.forEach(listSettings, function(listSetting, setting) {
// then for each setting that corresponds to a list setting
if (!pandora.user.ui.lists[list]) {
// either add the default setting
add[setting] = pandora.site.user.ui[setting];
} else {
// or the existing list setting
add[setting] = pandora.user.ui.lists[list][listSetting]
}
});
}
add.itemFind = pandora.isItemFind(args.find)
? args.find : pandora.site.user.ui.itemFind;
} else {
list = self.previousUI._list;
}
// it is important to check for find first, so that
// if find changes list, list is correct here
item = args.item || pandora.user.ui.item;
listView = add.listView || args.listView;
if (listView) {
if (pandora.isClipView(listView)) {
// when switching to a clip view, clear list selection
// (but don't trigger an additional event)
add.listSelection = [];
} else if (['text', 'position'].indexOf(pandora.user.ui.listSort[0].key) > -1) {
// when switchin to a non-clip view, with a sort key
// that only exists in clip view, reset sort to default
args.listSort = pandora.site.user.ui.listSort;
}
}
if (!pandora.user.ui.lists[list]) {
add['lists.' + that.encode(list)] = {};
}
Ox.forEach(listSettings, function(listSetting, setting) {
// for each setting that corresponds to a list setting
// set that list setting to
var key = 'lists.' + that.encode(list) + '.' + listSetting;
if (setting in args) {
// the setting passed to UI.set
add[key] = args[setting];
} else if (setting in add) {
// or the setting changed via find
add[key] = add[setting];
} else if (!pandora.user.ui.lists[list]) {
// or the default setting
add[key] = pandora.site.user.ui[setting];
}
});
if (args.item) {
// when switching to an item, update list selection
add['listSelection'] = [args.item];
add['lists.' + that.encode(list) + '.selection'] = [args.item];
if (
!args.itemView
&& ['video', 'timeline'].indexOf(pandora.user.ui.itemView) > -1
&& !pandora.user.ui.videoPoints[item]
&& !args['videoPoints.' + item]
) {
// if the item view doesn't change, remains a video view,
// video points don't exist yet, and won't be set,
// add default video points
add['videoPoints.' + item] = {annotation: '', 'in': 0, out: 0, position: 0};
}
}
if (['video', 'timeline'].indexOf(args.itemView) > -1) {
// when switching to a video view, add it as default video view
args.videoView = args.itemView;
if (
!pandora.user.ui.videoPoints[item]
&& !args['videoPoints.' + item]
) {
// if video points don't exist yet, and won't be set,
// add default video points
add['videoPoints.' + item] = {annotation: '', 'in': 0, out: 0, position: 0};
}
}
[args, add].forEach(function(obj, isAdd) {
Ox.forEach(obj, function(val, key) {
Ox.Log('', 'key/val', key, val)
// make sure to not split at escaped dots ('\.')
var keys = key.replace(/\\\./g, '\n').split('.').map(function(key) {
return key.replace(/\n/g, '.')
}),
ui = pandora.user.ui;
while (keys.length > 1) {
ui = ui[keys.shift()];
}
if (!Ox.isEqual(ui[keys[0]], val)) {
if (val === null) {
delete ui[keys[0]]
} else {
ui[keys[0]] = val;
}
set[key] = val;
if (!isAdd) {
trigger[key] = val;
}
}
});
});
Ox.len(set) && pandora.api.setUI(set);
triggerEvents && Ox.forEach(trigger, function(val, key) {
Ox.forEach(pandora.$ui, function(element) {
element.ox && element.triggerEvent('pandora_' + key.toLowerCase(), {
value: val,
previousValue: self.previousUI[key]
});
});
});
pandora.URL.update(Object.keys(
!pandora.$ui.appPanel ? args : trigger
));
};
return that;
}());