|
|
// Copyright (c) IPython Development Team.
|
|
|
// Distributed under the terms of the Modified BSD License.
|
|
|
|
|
|
define(["widgets/js/manager",
|
|
|
"underscore",
|
|
|
"backbone",
|
|
|
"jquery",
|
|
|
"base/js/utils",
|
|
|
"base/js/namespace",
|
|
|
], function(widgetmanager, _, Backbone, $, utils, IPython){
|
|
|
"use strict";
|
|
|
|
|
|
var unpack_models = function unpack_models(value, model) {
|
|
|
/**
|
|
|
* Replace model ids with models recursively.
|
|
|
*/
|
|
|
var unpacked;
|
|
|
if ($.isArray(value)) {
|
|
|
unpacked = [];
|
|
|
_.each(value, function(sub_value, key) {
|
|
|
unpacked.push(unpack_models(sub_value, model));
|
|
|
});
|
|
|
return Promise.all(unpacked);
|
|
|
} else if (value instanceof Object) {
|
|
|
unpacked = {};
|
|
|
_.each(value, function(sub_value, key) {
|
|
|
unpacked[key] = unpack_models(sub_value, model);
|
|
|
});
|
|
|
return utils.resolve_promises_dict(unpacked);
|
|
|
} else if (typeof value === 'string' && value.slice(0,10) === "IPY_MODEL_") {
|
|
|
// get_model returns a promise already
|
|
|
return model.widget_manager.get_model(value.slice(10, value.length));
|
|
|
} else {
|
|
|
return Promise.resolve(value);
|
|
|
}
|
|
|
};
|
|
|
|
|
|
var WidgetModel = Backbone.Model.extend({
|
|
|
constructor: function (widget_manager, model_id, comm) {
|
|
|
/**
|
|
|
* Constructor
|
|
|
*
|
|
|
* Creates a WidgetModel instance.
|
|
|
*
|
|
|
* Parameters
|
|
|
* ----------
|
|
|
* widget_manager : WidgetManager instance
|
|
|
* model_id : string
|
|
|
* An ID unique to this model.
|
|
|
* comm : Comm instance (optional)
|
|
|
*/
|
|
|
this.widget_manager = widget_manager;
|
|
|
this.state_change = Promise.resolve();
|
|
|
this._buffered_state_diff = {};
|
|
|
this.pending_msgs = 0;
|
|
|
this.msg_buffer = null;
|
|
|
this.state_lock = null;
|
|
|
this.id = model_id;
|
|
|
this.views = {};
|
|
|
this._resolve_received_state = {};
|
|
|
|
|
|
if (comm !== undefined) {
|
|
|
// Remember comm associated with the model.
|
|
|
this.comm = comm;
|
|
|
comm.model = this;
|
|
|
|
|
|
// Hook comm messages up to model.
|
|
|
comm.on_close($.proxy(this._handle_comm_closed, this));
|
|
|
comm.on_msg($.proxy(this._handle_comm_msg, this));
|
|
|
|
|
|
// Assume the comm is alive.
|
|
|
this.set_comm_live(true);
|
|
|
} else {
|
|
|
this.set_comm_live(false);
|
|
|
}
|
|
|
|
|
|
// Listen for the events that lead to the websocket being terminated.
|
|
|
var that = this;
|
|
|
var died = function() {
|
|
|
that.set_comm_live(false);
|
|
|
};
|
|
|
widget_manager.notebook.events.on('kernel_disconnected.Kernel', died);
|
|
|
widget_manager.notebook.events.on('kernel_killed.Kernel', died);
|
|
|
widget_manager.notebook.events.on('kernel_restarting.Kernel', died);
|
|
|
widget_manager.notebook.events.on('kernel_dead.Kernel', died);
|
|
|
|
|
|
return Backbone.Model.apply(this);
|
|
|
},
|
|
|
|
|
|
send: function (content, callbacks, buffers) {
|
|
|
/**
|
|
|
* Send a custom msg over the comm.
|
|
|
*/
|
|
|
if (this.comm !== undefined) {
|
|
|
var data = {method: 'custom', content: content};
|
|
|
this.comm.send(data, callbacks, {}, buffers);
|
|
|
this.pending_msgs++;
|
|
|
}
|
|
|
},
|
|
|
|
|
|
request_state: function(callbacks) {
|
|
|
/**
|
|
|
* Request a state push from the back-end.
|
|
|
*/
|
|
|
if (!this.comm) {
|
|
|
console.error("Could not request_state because comm doesn't exist!");
|
|
|
return;
|
|
|
}
|
|
|
|
|
|
var msg_id = this.comm.send({method: 'request_state'}, callbacks || this.widget_manager.callbacks());
|
|
|
|
|
|
// Promise that is resolved when a state is received
|
|
|
// from the back-end.
|
|
|
var that = this;
|
|
|
var received_state = new Promise(function(resolve) {
|
|
|
that._resolve_received_state[msg_id] = resolve;
|
|
|
});
|
|
|
return received_state;
|
|
|
},
|
|
|
|
|
|
set_comm_live: function(live) {
|
|
|
/**
|
|
|
* Change the comm_live state of the model.
|
|
|
*/
|
|
|
if (this.comm_live === undefined || this.comm_live != live) {
|
|
|
this.comm_live = live;
|
|
|
this.trigger(live ? 'comm:live' : 'comm:dead', {model: this});
|
|
|
}
|
|
|
},
|
|
|
|
|
|
close: function(comm_closed) {
|
|
|
/**
|
|
|
* Close model
|
|
|
*/
|
|
|
if (this.comm && !comm_closed) {
|
|
|
this.comm.close();
|
|
|
}
|
|
|
this.stopListening();
|
|
|
this.trigger('destroy', this);
|
|
|
delete this.comm.model; // Delete ref so GC will collect widget model.
|
|
|
delete this.comm;
|
|
|
delete this.model_id; // Delete id from model so widget manager cleans up.
|
|
|
_.each(this.views, function(v, id, views) {
|
|
|
v.then(function(view) {
|
|
|
view.remove();
|
|
|
delete views[id];
|
|
|
});
|
|
|
});
|
|
|
},
|
|
|
|
|
|
_handle_comm_closed: function (msg) {
|
|
|
/**
|
|
|
* Handle when a widget is closed.
|
|
|
*/
|
|
|
this.trigger('comm:close');
|
|
|
this.close(true);
|
|
|
},
|
|
|
|
|
|
_handle_comm_msg: function (msg) {
|
|
|
/**
|
|
|
* Handle incoming comm msg.
|
|
|
*/
|
|
|
var method = msg.content.data.method;
|
|
|
|
|
|
var that = this;
|
|
|
switch (method) {
|
|
|
case 'update':
|
|
|
this.state_change = this.state_change
|
|
|
.then(function() {
|
|
|
var state = msg.content.data.state || {};
|
|
|
var buffer_keys = msg.content.data.buffers || [];
|
|
|
var buffers = msg.buffers || [];
|
|
|
for (var i=0; i<buffer_keys.length; i++) {
|
|
|
state[buffer_keys[i]] = buffers[i];
|
|
|
}
|
|
|
|
|
|
// deserialize fields that have custom deserializers
|
|
|
var serializers = that.constructor.serializers;
|
|
|
if (serializers) {
|
|
|
for (var k in state) {
|
|
|
if (serializers[k] && serializers[k].deserialize) {
|
|
|
state[k] = (serializers[k].deserialize)(state[k], that);
|
|
|
}
|
|
|
}
|
|
|
}
|
|
|
return utils.resolve_promises_dict(state);
|
|
|
}).then(function(state) {
|
|
|
return that.set_state(state);
|
|
|
}).catch(utils.reject("Couldn't process update msg for model id '" + String(that.id) + "'", true))
|
|
|
.then(function() {
|
|
|
var parent_id = msg.parent_header.msg_id;
|
|
|
if (that._resolve_received_state[parent_id] !== undefined) {
|
|
|
that._resolve_received_state[parent_id].call();
|
|
|
delete that._resolve_received_state[parent_id];
|
|
|
}
|
|
|
}).catch(utils.reject("Couldn't resolve state request promise", true));
|
|
|
break;
|
|
|
case 'custom':
|
|
|
this.trigger('msg:custom', msg.content.data.content, msg.buffers);
|
|
|
break;
|
|
|
case 'display':
|
|
|
this.state_change = this.state_change.then(function() {
|
|
|
that.widget_manager.display_view(msg, that);
|
|
|
}).catch(utils.reject('Could not process display view msg', true));
|
|
|
break;
|
|
|
}
|
|
|
},
|
|
|
|
|
|
set_state: function (state) {
|
|
|
var that = this;
|
|
|
// Handle when a widget is updated via the python side.
|
|
|
return new Promise(function(resolve, reject) {
|
|
|
that.state_lock = state;
|
|
|
try {
|
|
|
WidgetModel.__super__.set.call(that, state);
|
|
|
} finally {
|
|
|
that.state_lock = null;
|
|
|
}
|
|
|
resolve();
|
|
|
}).catch(utils.reject("Couldn't set model state", true));
|
|
|
},
|
|
|
|
|
|
get_state: function() {
|
|
|
// Get the serializable state of the model.
|
|
|
// Equivalent to Backbone.Model.toJSON()
|
|
|
return _.clone(this.attributes);
|
|
|
},
|
|
|
|
|
|
_handle_status: function (msg, callbacks) {
|
|
|
/**
|
|
|
* Handle status msgs.
|
|
|
*
|
|
|
* execution_state : ('busy', 'idle', 'starting')
|
|
|
*/
|
|
|
if (this.comm !== undefined) {
|
|
|
if (msg.content.execution_state ==='idle') {
|
|
|
// Send buffer if this message caused another message to be
|
|
|
// throttled.
|
|
|
if (this.msg_buffer !== null &&
|
|
|
(this.get('msg_throttle') || 3) === this.pending_msgs) {
|
|
|
var data = {method: 'backbone', sync_method: 'update', sync_data: this.msg_buffer};
|
|
|
this.comm.send(data, callbacks);
|
|
|
this.msg_buffer = null;
|
|
|
} else {
|
|
|
--this.pending_msgs;
|
|
|
}
|
|
|
}
|
|
|
}
|
|
|
},
|
|
|
|
|
|
callbacks: function(view) {
|
|
|
/**
|
|
|
* Create msg callbacks for a comm msg.
|
|
|
*/
|
|
|
var callbacks = this.widget_manager.callbacks(view);
|
|
|
|
|
|
if (callbacks.iopub === undefined) {
|
|
|
callbacks.iopub = {};
|
|
|
}
|
|
|
|
|
|
var that = this;
|
|
|
callbacks.iopub.status = function (msg) {
|
|
|
that._handle_status(msg, callbacks);
|
|
|
};
|
|
|
return callbacks;
|
|
|
},
|
|
|
|
|
|
set: function(key, val, options) {
|
|
|
/**
|
|
|
* Set a value.
|
|
|
*/
|
|
|
var return_value = WidgetModel.__super__.set.apply(this, arguments);
|
|
|
|
|
|
// Backbone only remembers the diff of the most recent set()
|
|
|
// operation. Calling set multiple times in a row results in a
|
|
|
// loss of diff information. Here we keep our own running diff.
|
|
|
this._buffered_state_diff = $.extend(this._buffered_state_diff, this.changedAttributes() || {});
|
|
|
return return_value;
|
|
|
},
|
|
|
|
|
|
sync: function (method, model, options) {
|
|
|
/**
|
|
|
* Handle sync to the back-end. Called when a model.save() is called.
|
|
|
*
|
|
|
* Make sure a comm exists.
|
|
|
|
|
|
* Parameters
|
|
|
* ----------
|
|
|
* method : create, update, patch, delete, read
|
|
|
* create/update always send the full attribute set
|
|
|
* patch - only send attributes listed in options.attrs, and if we are queuing
|
|
|
* up messages, combine with previous messages that have not been sent yet
|
|
|
* model : the model we are syncing
|
|
|
* will normally be the same as `this`
|
|
|
* options : dict
|
|
|
* the `attrs` key, if it exists, gives an {attr: value} dict that should be synced,
|
|
|
* otherwise, sync all attributes
|
|
|
*
|
|
|
*/
|
|
|
var error = options.error || function() {
|
|
|
console.error('Backbone sync error:', arguments);
|
|
|
};
|
|
|
if (this.comm === undefined) {
|
|
|
error();
|
|
|
return false;
|
|
|
}
|
|
|
|
|
|
var attrs = (method === 'patch') ? options.attrs : model.get_state(options);
|
|
|
|
|
|
// the state_lock lists attributes that are currently be changed right now from a kernel message
|
|
|
// we don't want to send these non-changes back to the kernel, so we delete them out of attrs
|
|
|
// (but we only delete them if the value hasn't changed from the value stored in the state_lock
|
|
|
if (this.state_lock !== null) {
|
|
|
var keys = Object.keys(this.state_lock);
|
|
|
for (var i=0; i<keys.length; i++) {
|
|
|
var key = keys[i];
|
|
|
if (attrs[key] === this.state_lock[key]) {
|
|
|
delete attrs[key];
|
|
|
}
|
|
|
}
|
|
|
}
|
|
|
|
|
|
if (_.size(attrs) > 0) {
|
|
|
|
|
|
// If this message was sent via backbone itself, it will not
|
|
|
// have any callbacks. It's important that we create callbacks
|
|
|
// so we can listen for status messages, etc...
|
|
|
var callbacks = options.callbacks || this.callbacks();
|
|
|
|
|
|
// Check throttle.
|
|
|
if (this.pending_msgs >= (this.get('msg_throttle') || 3)) {
|
|
|
// The throttle has been exceeded, buffer the current msg so
|
|
|
// it can be sent once the kernel has finished processing
|
|
|
// some of the existing messages.
|
|
|
|
|
|
// Combine updates if it is a 'patch' sync, otherwise replace updates
|
|
|
switch (method) {
|
|
|
case 'patch':
|
|
|
this.msg_buffer = $.extend(this.msg_buffer || {}, attrs);
|
|
|
break;
|
|
|
case 'update':
|
|
|
case 'create':
|
|
|
this.msg_buffer = attrs;
|
|
|
break;
|
|
|
default:
|
|
|
error();
|
|
|
return false;
|
|
|
}
|
|
|
this.msg_buffer_callbacks = callbacks;
|
|
|
|
|
|
} else {
|
|
|
// We haven't exceeded the throttle, send the message like
|
|
|
// normal.
|
|
|
this.send_sync_message(attrs, callbacks);
|
|
|
this.pending_msgs++;
|
|
|
}
|
|
|
}
|
|
|
// Since the comm is a one-way communication, assume the message
|
|
|
// arrived. Don't call success since we don't have a model back from the server
|
|
|
// this means we miss out on the 'sync' event.
|
|
|
this._buffered_state_diff = {};
|
|
|
},
|
|
|
|
|
|
|
|
|
send_sync_message: function(attrs, callbacks) {
|
|
|
// prepare and send a comm message syncing attrs
|
|
|
var that = this;
|
|
|
// first, build a state dictionary with key=the attribute and the value
|
|
|
// being the value or the promise of the serialized value
|
|
|
var serializers = this.constructor.serializers;
|
|
|
if (serializers) {
|
|
|
for (k in attrs) {
|
|
|
if (serializers[k] && serializers[k].serialize) {
|
|
|
attrs[k] = (serializers[k].serialize)(attrs[k], this);
|
|
|
}
|
|
|
}
|
|
|
}
|
|
|
utils.resolve_promises_dict(attrs).then(function(state) {
|
|
|
// get binary values, then send
|
|
|
var keys = Object.keys(state);
|
|
|
var buffers = [];
|
|
|
var buffer_keys = [];
|
|
|
for (var i=0; i<keys.length; i++) {
|
|
|
var key = keys[i];
|
|
|
var value = state[key];
|
|
|
if (value.buffer instanceof ArrayBuffer
|
|
|
|| value instanceof ArrayBuffer) {
|
|
|
buffers.push(value);
|
|
|
buffer_keys.push(key);
|
|
|
delete state[key];
|
|
|
}
|
|
|
}
|
|
|
that.comm.send({method: 'backbone', sync_data: state, buffer_keys: buffer_keys}, callbacks, {}, buffers);
|
|
|
}).catch(function(error) {
|
|
|
that.pending_msgs--;
|
|
|
return (utils.reject("Couldn't send widget sync message", true))(error);
|
|
|
});
|
|
|
},
|
|
|
|
|
|
save_changes: function(callbacks) {
|
|
|
/**
|
|
|
* Push this model's state to the back-end
|
|
|
*
|
|
|
* This invokes a Backbone.Sync.
|
|
|
*/
|
|
|
this.save(this._buffered_state_diff, {patch: true, callbacks: callbacks});
|
|
|
},
|
|
|
|
|
|
on_some_change: function(keys, callback, context) {
|
|
|
/**
|
|
|
* on_some_change(["key1", "key2"], foo, context) differs from
|
|
|
* on("change:key1 change:key2", foo, context).
|
|
|
* If the widget attributes key1 and key2 are both modified,
|
|
|
* the second form will result in foo being called twice
|
|
|
* while the first will call foo only once.
|
|
|
*/
|
|
|
this.on('change', function() {
|
|
|
if (keys.some(this.hasChanged, this)) {
|
|
|
callback.apply(context, arguments);
|
|
|
}
|
|
|
}, this);
|
|
|
|
|
|
},
|
|
|
|
|
|
toJSON: function(options) {
|
|
|
/**
|
|
|
* Serialize the model. See the types.js deserialization function
|
|
|
* and the kernel-side serializer/deserializer
|
|
|
*/
|
|
|
return "IPY_MODEL_"+this.id;
|
|
|
}
|
|
|
});
|
|
|
widgetmanager.WidgetManager.register_widget_model('WidgetModel', WidgetModel);
|
|
|
|
|
|
|
|
|
var WidgetView = Backbone.View.extend({
|
|
|
initialize: function(parameters) {
|
|
|
/**
|
|
|
* Public constructor.
|
|
|
*/
|
|
|
this.model.on('change',this.update,this);
|
|
|
|
|
|
// Bubble the comm live events.
|
|
|
this.model.on('comm:live', function() {
|
|
|
this.trigger('comm:live', this);
|
|
|
}, this);
|
|
|
this.model.on('comm:dead', function() {
|
|
|
this.trigger('comm:dead', this);
|
|
|
}, this);
|
|
|
|
|
|
this.options = parameters.options;
|
|
|
this.on('displayed', function() {
|
|
|
this.is_displayed = true;
|
|
|
}, this);
|
|
|
},
|
|
|
|
|
|
update: function(){
|
|
|
/**
|
|
|
* Triggered on model change.
|
|
|
*
|
|
|
* Update view to be consistent with this.model
|
|
|
*/
|
|
|
},
|
|
|
|
|
|
create_child_view: function(child_model, options) {
|
|
|
/**
|
|
|
* Create and promise that resolves to a child view of a given model
|
|
|
*/
|
|
|
var that = this;
|
|
|
options = $.extend({ parent: this }, options || {});
|
|
|
return this.model.widget_manager.create_view(child_model, options).catch(utils.reject("Couldn't create child view", true));
|
|
|
},
|
|
|
|
|
|
callbacks: function(){
|
|
|
/**
|
|
|
* Create msg callbacks for a comm msg.
|
|
|
*/
|
|
|
return this.model.callbacks(this);
|
|
|
},
|
|
|
|
|
|
render: function(){
|
|
|
/**
|
|
|
* Render the view.
|
|
|
*
|
|
|
* By default, this is only called the first time the view is created
|
|
|
*/
|
|
|
},
|
|
|
|
|
|
send: function (content, buffers) {
|
|
|
/**
|
|
|
* Send a custom msg associated with this view.
|
|
|
*/
|
|
|
this.model.send(content, this.callbacks(), buffers);
|
|
|
},
|
|
|
|
|
|
touch: function () {
|
|
|
this.model.save_changes(this.callbacks());
|
|
|
},
|
|
|
|
|
|
after_displayed: function (callback, context) {
|
|
|
/**
|
|
|
* Calls the callback right away is the view is already displayed
|
|
|
* otherwise, register the callback to the 'displayed' event.
|
|
|
*/
|
|
|
if (this.is_displayed) {
|
|
|
callback.apply(context);
|
|
|
} else {
|
|
|
this.on('displayed', callback, context);
|
|
|
}
|
|
|
},
|
|
|
|
|
|
remove: function () {
|
|
|
// Raise a remove event when the view is removed.
|
|
|
WidgetView.__super__.remove.apply(this, arguments);
|
|
|
this.trigger('remove');
|
|
|
}
|
|
|
});
|
|
|
|
|
|
|
|
|
var DOMWidgetView = WidgetView.extend({
|
|
|
initialize: function (parameters) {
|
|
|
/**
|
|
|
* Public constructor
|
|
|
*/
|
|
|
DOMWidgetView.__super__.initialize.apply(this, [parameters]);
|
|
|
this.model.on('change:visible', this.update_visible, this);
|
|
|
this.model.on('change:_css', this.update_css, this);
|
|
|
|
|
|
this.model.on('change:_dom_classes', function(model, new_classes) {
|
|
|
var old_classes = model.previous('_dom_classes');
|
|
|
this.update_classes(old_classes, new_classes);
|
|
|
}, this);
|
|
|
|
|
|
this.model.on('change:color', function (model, value) {
|
|
|
this.update_attr('color', value); }, this);
|
|
|
|
|
|
this.model.on('change:background_color', function (model, value) {
|
|
|
this.update_attr('background', value); }, this);
|
|
|
|
|
|
this.model.on('change:width', function (model, value) {
|
|
|
this.update_attr('width', value); }, this);
|
|
|
|
|
|
this.model.on('change:height', function (model, value) {
|
|
|
this.update_attr('height', value); }, this);
|
|
|
|
|
|
this.model.on('change:border_color', function (model, value) {
|
|
|
this.update_attr('border-color', value); }, this);
|
|
|
|
|
|
this.model.on('change:border_width', function (model, value) {
|
|
|
this.update_attr('border-width', value); }, this);
|
|
|
|
|
|
this.model.on('change:border_style', function (model, value) {
|
|
|
this.update_attr('border-style', value); }, this);
|
|
|
|
|
|
this.model.on('change:font_style', function (model, value) {
|
|
|
this.update_attr('font-style', value); }, this);
|
|
|
|
|
|
this.model.on('change:font_weight', function (model, value) {
|
|
|
this.update_attr('font-weight', value); }, this);
|
|
|
|
|
|
this.model.on('change:font_size', function (model, value) {
|
|
|
this.update_attr('font-size', this._default_px(value)); }, this);
|
|
|
|
|
|
this.model.on('change:font_family', function (model, value) {
|
|
|
this.update_attr('font-family', value); }, this);
|
|
|
|
|
|
this.model.on('change:padding', function (model, value) {
|
|
|
this.update_attr('padding', value); }, this);
|
|
|
|
|
|
this.model.on('change:margin', function (model, value) {
|
|
|
this.update_attr('margin', this._default_px(value)); }, this);
|
|
|
|
|
|
this.model.on('change:border_radius', function (model, value) {
|
|
|
this.update_attr('border-radius', this._default_px(value)); }, this);
|
|
|
|
|
|
this.after_displayed(function() {
|
|
|
this.update_visible(this.model, this.model.get("visible"));
|
|
|
this.update_classes([], this.model.get('_dom_classes'));
|
|
|
|
|
|
this.update_attr('color', this.model.get('color'));
|
|
|
this.update_attr('background', this.model.get('background_color'));
|
|
|
this.update_attr('width', this.model.get('width'));
|
|
|
this.update_attr('height', this.model.get('height'));
|
|
|
this.update_attr('border-color', this.model.get('border_color'));
|
|
|
this.update_attr('border-width', this.model.get('border_width'));
|
|
|
this.update_attr('border-style', this.model.get('border_style'));
|
|
|
this.update_attr('font-style', this.model.get('font_style'));
|
|
|
this.update_attr('font-weight', this.model.get('font_weight'));
|
|
|
this.update_attr('font-size', this._default_px(this.model.get('font_size')));
|
|
|
this.update_attr('font-family', this.model.get('font_family'));
|
|
|
this.update_attr('padding', this.model.get('padding'));
|
|
|
this.update_attr('margin', this._default_px(this.model.get('margin')));
|
|
|
this.update_attr('border-radius', this._default_px(this.model.get('border_radius')));
|
|
|
|
|
|
this.update_css(this.model, this.model.get("_css"));
|
|
|
}, this);
|
|
|
},
|
|
|
|
|
|
_default_px: function(value) {
|
|
|
/**
|
|
|
* Makes browser interpret a numerical string as a pixel value.
|
|
|
*/
|
|
|
if (value && /^\d+\.?(\d+)?$/.test(value.trim())) {
|
|
|
return value.trim() + 'px';
|
|
|
}
|
|
|
return value;
|
|
|
},
|
|
|
|
|
|
update_attr: function(name, value) {
|
|
|
/**
|
|
|
* Set a css attr of the widget view.
|
|
|
*/
|
|
|
this.$el.css(name, value);
|
|
|
},
|
|
|
|
|
|
update_visible: function(model, value) {
|
|
|
/**
|
|
|
* Update visibility
|
|
|
*/
|
|
|
switch(value) {
|
|
|
case null: // python None
|
|
|
this.$el.show().css('visibility', 'hidden'); break;
|
|
|
case false:
|
|
|
this.$el.hide(); break;
|
|
|
case true:
|
|
|
this.$el.show().css('visibility', ''); break;
|
|
|
}
|
|
|
},
|
|
|
|
|
|
update_css: function (model, css) {
|
|
|
/**
|
|
|
* Update the css styling of this view.
|
|
|
*/
|
|
|
if (css === undefined) {return;}
|
|
|
for (var i = 0; i < css.length; i++) {
|
|
|
// Apply the css traits to all elements that match the selector.
|
|
|
var selector = css[i][0];
|
|
|
var elements = this._get_selector_element(selector);
|
|
|
if (elements.length > 0) {
|
|
|
var trait_key = css[i][1];
|
|
|
var trait_value = css[i][2];
|
|
|
elements.css(trait_key ,trait_value);
|
|
|
}
|
|
|
}
|
|
|
},
|
|
|
|
|
|
update_classes: function (old_classes, new_classes, $el) {
|
|
|
/**
|
|
|
* Update the DOM classes applied to an element, default to this.$el.
|
|
|
*/
|
|
|
if ($el===undefined) {
|
|
|
$el = this.$el;
|
|
|
}
|
|
|
_.difference(old_classes, new_classes).map(function(c) {$el.removeClass(c);})
|
|
|
_.difference(new_classes, old_classes).map(function(c) {$el.addClass(c);})
|
|
|
},
|
|
|
|
|
|
update_mapped_classes: function(class_map, trait_name, previous_trait_value, $el) {
|
|
|
/**
|
|
|
* Update the DOM classes applied to the widget based on a single
|
|
|
* trait's value.
|
|
|
*
|
|
|
* Given a trait value classes map, this function automatically
|
|
|
* handles applying the appropriate classes to the widget element
|
|
|
* and removing classes that are no longer valid.
|
|
|
*
|
|
|
* Parameters
|
|
|
* ----------
|
|
|
* class_map: dictionary
|
|
|
* Dictionary of trait values to class lists.
|
|
|
* Example:
|
|
|
* {
|
|
|
* success: ['alert', 'alert-success'],
|
|
|
* info: ['alert', 'alert-info'],
|
|
|
* warning: ['alert', 'alert-warning'],
|
|
|
* danger: ['alert', 'alert-danger']
|
|
|
* };
|
|
|
* trait_name: string
|
|
|
* Name of the trait to check the value of.
|
|
|
* previous_trait_value: optional string, default ''
|
|
|
* Last trait value
|
|
|
* $el: optional jQuery element handle, defaults to this.$el
|
|
|
* Element that the classes are applied to.
|
|
|
*/
|
|
|
var key = previous_trait_value;
|
|
|
if (key === undefined) {
|
|
|
key = this.model.previous(trait_name);
|
|
|
}
|
|
|
var old_classes = class_map[key] ? class_map[key] : [];
|
|
|
key = this.model.get(trait_name);
|
|
|
var new_classes = class_map[key] ? class_map[key] : [];
|
|
|
|
|
|
this.update_classes(old_classes, new_classes, $el || this.$el);
|
|
|
},
|
|
|
|
|
|
_get_selector_element: function (selector) {
|
|
|
/**
|
|
|
* Get the elements via the css selector.
|
|
|
*/
|
|
|
var elements;
|
|
|
if (!selector) {
|
|
|
elements = this.$el;
|
|
|
} else {
|
|
|
elements = this.$el.find(selector).addBack(selector);
|
|
|
}
|
|
|
return elements;
|
|
|
},
|
|
|
|
|
|
typeset: function(element, text){
|
|
|
utils.typeset.apply(null, arguments);
|
|
|
},
|
|
|
});
|
|
|
|
|
|
|
|
|
var ViewList = function(create_view, remove_view, context) {
|
|
|
/**
|
|
|
* - create_view and remove_view are default functions called when adding or removing views
|
|
|
* - create_view takes a model and returns a view or a promise for a view for that model
|
|
|
* - remove_view takes a view and destroys it (including calling `view.remove()`)
|
|
|
* - each time the update() function is called with a new list, the create and remove
|
|
|
* callbacks will be called in an order so that if you append the views created in the
|
|
|
* create callback and remove the views in the remove callback, you will duplicate
|
|
|
* the order of the list.
|
|
|
* - the remove callback defaults to just removing the view (e.g., pass in null for the second parameter)
|
|
|
* - the context defaults to the created ViewList. If you pass another context, the create and remove
|
|
|
* will be called in that context.
|
|
|
*/
|
|
|
|
|
|
this.initialize.apply(this, arguments);
|
|
|
};
|
|
|
|
|
|
_.extend(ViewList.prototype, {
|
|
|
initialize: function(create_view, remove_view, context) {
|
|
|
this._handler_context = context || this;
|
|
|
this._models = [];
|
|
|
this.views = []; // list of promises for views
|
|
|
this._create_view = create_view;
|
|
|
this._remove_view = remove_view || function(view) {view.remove();};
|
|
|
},
|
|
|
|
|
|
update: function(new_models, create_view, remove_view, context) {
|
|
|
/**
|
|
|
* the create_view, remove_view, and context arguments override the defaults
|
|
|
* specified when the list is created.
|
|
|
* after this function, the .views attribute is a list of promises for views
|
|
|
* if you want to perform some action on the list of views, do something like
|
|
|
* `Promise.all(myviewlist.views).then(function(views) {...});`
|
|
|
*/
|
|
|
var remove = remove_view || this._remove_view;
|
|
|
var create = create_view || this._create_view;
|
|
|
context = context || this._handler_context;
|
|
|
var i = 0;
|
|
|
// first, skip past the beginning of the lists if they are identical
|
|
|
for (; i < new_models.length; i++) {
|
|
|
if (i >= this._models.length || new_models[i] !== this._models[i]) {
|
|
|
break;
|
|
|
}
|
|
|
}
|
|
|
|
|
|
var first_removed = i;
|
|
|
// Remove the non-matching items from the old list.
|
|
|
var removed = this.views.splice(first_removed, this.views.length-first_removed);
|
|
|
for (var j = 0; j < removed.length; j++) {
|
|
|
removed[j].then(function(view) {
|
|
|
remove.call(context, view)
|
|
|
});
|
|
|
}
|
|
|
|
|
|
// Add the rest of the new list items.
|
|
|
for (; i < new_models.length; i++) {
|
|
|
this.views.push(Promise.resolve(create.call(context, new_models[i])));
|
|
|
}
|
|
|
// make a copy of the input array
|
|
|
this._models = new_models.slice();
|
|
|
},
|
|
|
|
|
|
remove: function() {
|
|
|
/**
|
|
|
* removes every view in the list; convenience function for `.update([])`
|
|
|
* that should be faster
|
|
|
* returns a promise that resolves after this removal is done
|
|
|
*/
|
|
|
var that = this;
|
|
|
return Promise.all(this.views).then(function(views) {
|
|
|
for (var i = 0; i < that.views.length; i++) {
|
|
|
that._remove_view.call(that._handler_context, views[i]);
|
|
|
}
|
|
|
that.views = [];
|
|
|
that._models = [];
|
|
|
});
|
|
|
},
|
|
|
});
|
|
|
|
|
|
var widget = {
|
|
|
'unpack_models': unpack_models,
|
|
|
'WidgetModel': WidgetModel,
|
|
|
'WidgetView': WidgetView,
|
|
|
'DOMWidgetView': DOMWidgetView,
|
|
|
'ViewList': ViewList,
|
|
|
};
|
|
|
|
|
|
// For backwards compatability.
|
|
|
$.extend(IPython, widget);
|
|
|
|
|
|
return widget;
|
|
|
});
|
|
|
|