openmedialibrary/static/js/UI.js

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JavaScript
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'use strict';
oml.UI = (function() {
var previousUI = {},
that = {};
that.encode = function(value) {
return value.replace(/\./g, '\\.');
};
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that.getPrevious = function(key) {
return !key ? previousUI : previousUI[key];
};
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that.reset = function() {
var ui = oml.user.ui;
oml.api.resetUI({}, function() {
ui = oml.config.user.ui;
ui._list = oml.getListState(ui.find);
ui._filterState = oml.getFilterState(ui.find);
ui._findState = oml.getFindState(ui.find);
Ox.Theme(ui.theme);
oml.$ui.appPanel.reload();
});
};
// sets oml.user.ui.key to value
// key foo.bar.baz sets oml.user.ui.foo.bar.baz
// value null removes a key
that.set = function(/* {key: value}[, flag] or key, value[, flag] */) {
var add = {},
args,
item,
list,
listSettings = oml.config.listSettings,
listView,
set = {},
trigger = {},
triggerEvents,
ui = oml.user.ui;
if (Ox.isObject(arguments[0])) {
args = arguments[0];
triggerEvents = Ox.isUndefined(arguments[1]) ? true : arguments[1];
} else {
args = Ox.makeObject([arguments[0], arguments[1]]);
triggerEvents = Ox.isUndefined(arguments[2]) ? true : arguments[1];
}
Ox.print('UI SET', JSON.stringify(args));
previousUI = Ox.clone(ui, true);
previousUI._list = oml.getListState(previousUI.find);
if ('find' in args) {
// the challenge here is that find may change list,
// and list may then change listSort and listView,
// which we don't want to trigger, since find triggers
// (values we put in add will be changed, but won't trigger)
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// FIXME: ABOVE COMMENT DOES NOT APPLY
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list = oml.getListState(args.find);
ui._list = list;
ui._filterState = oml.getFilterState(args.find);
ui._findState = oml.getFindState(args.find);
if (oml.$ui.appPanel && !oml.stayInItemView) {
// if we're not on page load, and if find isn't a context change
// caused by an edit, then switch from item view to list view
args.item = '';
}
if (list != previousUI._list) {
// if find has changed list
Ox.forEach(listSettings, function(listSetting, setting) {
// then for each setting that corresponds to a list setting
if (!ui.lists[list]) {
// either add the default setting
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args[setting] = oml.config.user.ui[setting];
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} else {
// or the existing list setting
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args[setting] = ui.lists[list][listSetting];
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}
});
}
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} else {
list = previousUI._list;
}
// it is important to check for find first, so that
// if find changes list, list is correct here
item = args.item || ui.item;
listView = add.listView || args.listView;
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if (!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
args[key] = args[setting];
} else if (setting in add) {
// or the setting changed via find
args[key] = add[setting];
} else if (!ui.lists[list]) {
// or the default setting
args[key] = oml.config.user.ui[setting];
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}
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});
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if (args.item) {
// when switching to an item, update list selection
add['listSelection'] = [args.item];
add['lists.' + that.encode(list) + '.selection'] = [args.item];
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if (
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!args.itemView
&& ui.itemView == 'book'
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&& !ui.mediaState[item]
&& !args['mediaState.' + item]
) {
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// if the item view doesn't change, remains a media view,
// media state doesn't exist yet, and won't be set, add
// default media state
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add['mediaState.' + item] = {position: 0, zoom: 1};
}
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}
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if (
args.itemView == 'book'
&& !ui.mediaState[item]
&& !args['mediaState.' + item]
) {
// when switching to a media view, media state doesn't exist
// yet, and won't be set, add default media state
add['mediaState.' + item] = {position: 0, zoom: 1};
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}
// items in args trigger events, items in add do not
[args, add].forEach(function(object, isAdd) {
Ox.forEach(object, function(value, key) {
// make sure to not split at escaped dots ('\.')
var keys = key.replace(/\\\./g, '\n').split('.').map(function(key) {
return key.replace(/\n/g, '.');
}),
ui_ = ui;
while (keys.length > 1) {
ui_ = ui_[keys.shift()];
}
if (!Ox.isEqual(ui_[keys[0]], value)) {
if (value === null) {
delete ui_[keys[0]];
} else {
ui_[keys[0]] = value;
}
set[key] = value;
if (!isAdd) {
trigger[key] = value;
}
}
});
});
if (Ox.len(set)) {
oml.api.setUI(set);
}
if (triggerEvents) {
Ox.forEach(trigger, function(value, key) {
Ox.print('UI TRIGGER', 'oml_' + key.toLowerCase(), value);
Ox.forEach(oml.$ui, function($elements) {
Ox.makeArray($elements).forEach(function($element) {
$element.triggerEvent('oml_' + key.toLowerCase(), {
value: value,
previousValue: previousUI[key]
});
});
});
});
}
oml.URL.update(Object.keys(!oml.$ui.appPanel ? args : trigger));
};
return that;
}());