|
|
// Copyright (c) IPython Development Team.
|
|
|
// Distributed under the terms of the Modified BSD License.
|
|
|
|
|
|
define(["widgets/js/manager",
|
|
|
"underscore",
|
|
|
"backbone",
|
|
|
"jquery",
|
|
|
"base/js/namespace",
|
|
|
], function(widgetmanager, _, Backbone, $, IPython){
|
|
|
|
|
|
var WidgetModel = Backbone.Model.extend({
|
|
|
constructor: function (widget_manager, model_id, comm) {
|
|
|
// Constructor
|
|
|
//
|
|
|
// Creates a WidgetModel instance.
|
|
|
//
|
|
|
// Parameters
|
|
|
// ----------
|
|
|
// widget_manager : WidgetManager instance
|
|
|
// model_id : string
|
|
|
// An ID unique to this model.
|
|
|
// comm : Comm instance (optional)
|
|
|
this.widget_manager = widget_manager;
|
|
|
this._buffered_state_diff = {};
|
|
|
this.pending_msgs = 0;
|
|
|
this.msg_buffer = null;
|
|
|
this.key_value_lock = null;
|
|
|
this.id = model_id;
|
|
|
this.views = [];
|
|
|
|
|
|
if (comm !== undefined) {
|
|
|
// Remember comm associated with the model.
|
|
|
this.comm = comm;
|
|
|
comm.model = this;
|
|
|
|
|
|
// Hook comm messages up to model.
|
|
|
comm.on_close($.proxy(this._handle_comm_closed, this));
|
|
|
comm.on_msg($.proxy(this._handle_comm_msg, this));
|
|
|
}
|
|
|
return Backbone.Model.apply(this);
|
|
|
},
|
|
|
|
|
|
send: function (content, callbacks) {
|
|
|
// Send a custom msg over the comm.
|
|
|
if (this.comm !== undefined) {
|
|
|
var data = {method: 'custom', content: content};
|
|
|
this.comm.send(data, callbacks);
|
|
|
this.pending_msgs++;
|
|
|
}
|
|
|
},
|
|
|
|
|
|
_handle_comm_closed: function (msg) {
|
|
|
// Handle when a widget is closed.
|
|
|
this.trigger('comm:close');
|
|
|
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(view, i) {
|
|
|
view.remove();
|
|
|
});
|
|
|
},
|
|
|
|
|
|
_handle_comm_msg: function (msg) {
|
|
|
// Handle incoming comm msg.
|
|
|
var method = msg.content.data.method;
|
|
|
switch (method) {
|
|
|
case 'update':
|
|
|
this.apply_update(msg.content.data.state);
|
|
|
break;
|
|
|
case 'custom':
|
|
|
this.trigger('msg:custom', msg.content.data.content);
|
|
|
break;
|
|
|
case 'display':
|
|
|
this.widget_manager.display_view(msg, this);
|
|
|
break;
|
|
|
}
|
|
|
},
|
|
|
|
|
|
apply_update: function (state) {
|
|
|
// Handle when a widget is updated via the python side.
|
|
|
var that = this;
|
|
|
_.each(state, function(value, key) {
|
|
|
that.key_value_lock = [key, value];
|
|
|
try {
|
|
|
WidgetModel.__super__.set.apply(that, [key, that._unpack_models(value)]);
|
|
|
} finally {
|
|
|
that.key_value_lock = null;
|
|
|
}
|
|
|
});
|
|
|
},
|
|
|
|
|
|
_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.
|
|
|
var error = options.error || function() {
|
|
|
console.error('Backbone sync error:', arguments);
|
|
|
};
|
|
|
if (this.comm === undefined) {
|
|
|
error();
|
|
|
return false;
|
|
|
}
|
|
|
|
|
|
// Delete any key value pairs that the back-end already knows about.
|
|
|
var attrs = (method === 'patch') ? options.attrs : model.toJSON(options);
|
|
|
if (this.key_value_lock !== null) {
|
|
|
var key = this.key_value_lock[0];
|
|
|
var value = this.key_value_lock[1];
|
|
|
if (attrs[key] === value) {
|
|
|
delete attrs[key];
|
|
|
}
|
|
|
}
|
|
|
|
|
|
// Only sync if there are attributes to send to the back-end.
|
|
|
attrs = this._pack_models(attrs);
|
|
|
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 = $.extend(this.msg_buffer || {}, attrs);
|
|
|
break;
|
|
|
case 'update':
|
|
|
case 'create':
|
|
|
this.msg_buffer = attrs;
|
|
|
break;
|
|
|
default:
|
|
|
error();
|
|
|
return false;
|
|
|
}
|
|
|
this.msg_buffer_callbacks = callbacks;
|
|
|
|
|
|
} else {
|
|
|
// We haven't exceeded the throttle, send the message like
|
|
|
// normal.
|
|
|
var data = {method: 'backbone', sync_data: attrs};
|
|
|
this.comm.send(data, callbacks);
|
|
|
this.pending_msgs++;
|
|
|
}
|
|
|
}
|
|
|
// Since the comm is a one-way communication, assume the message
|
|
|
// arrived. Don't call success since we don't have a model back from the server
|
|
|
// this means we miss out on the 'sync' event.
|
|
|
this._buffered_state_diff = {};
|
|
|
},
|
|
|
|
|
|
save_changes: function(callbacks) {
|
|
|
// Push this model's state to the back-end
|
|
|
//
|
|
|
// This invokes a Backbone.Sync.
|
|
|
this.save(this._buffered_state_diff, {patch: true, callbacks: callbacks});
|
|
|
},
|
|
|
|
|
|
_pack_models: function(value) {
|
|
|
// Replace models with model ids recursively.
|
|
|
var that = this;
|
|
|
var packed;
|
|
|
if (value instanceof Backbone.Model) {
|
|
|
return "IPY_MODEL_" + value.id;
|
|
|
|
|
|
} else if ($.isArray(value)) {
|
|
|
packed = [];
|
|
|
_.each(value, function(sub_value, key) {
|
|
|
packed.push(that._pack_models(sub_value));
|
|
|
});
|
|
|
return packed;
|
|
|
|
|
|
} else if (value instanceof Object) {
|
|
|
packed = {};
|
|
|
_.each(value, function(sub_value, key) {
|
|
|
packed[key] = that._pack_models(sub_value);
|
|
|
});
|
|
|
return packed;
|
|
|
|
|
|
} else {
|
|
|
return value;
|
|
|
}
|
|
|
},
|
|
|
|
|
|
_unpack_models: function(value) {
|
|
|
// Replace model ids with models recursively.
|
|
|
var that = this;
|
|
|
var unpacked;
|
|
|
if ($.isArray(value)) {
|
|
|
unpacked = [];
|
|
|
_.each(value, function(sub_value, key) {
|
|
|
unpacked.push(that._unpack_models(sub_value));
|
|
|
});
|
|
|
return unpacked;
|
|
|
|
|
|
} else if (value instanceof Object) {
|
|
|
unpacked = {};
|
|
|
_.each(value, function(sub_value, key) {
|
|
|
unpacked[key] = that._unpack_models(sub_value);
|
|
|
});
|
|
|
return unpacked;
|
|
|
|
|
|
} else if (typeof value === 'string' && value.slice(0,10) === "IPY_MODEL_") {
|
|
|
var model = this.widget_manager.get_model(value.slice(10, value.length));
|
|
|
if (model) {
|
|
|
return model;
|
|
|
} else {
|
|
|
return value;
|
|
|
}
|
|
|
} else {
|
|
|
return value;
|
|
|
}
|
|
|
},
|
|
|
|
|
|
});
|
|
|
widgetmanager.WidgetManager.register_widget_model('WidgetModel', WidgetModel);
|
|
|
|
|
|
|
|
|
var WidgetView = Backbone.View.extend({
|
|
|
initialize: function(parameters) {
|
|
|
// Public constructor.
|
|
|
this.model.on('change',this.update,this);
|
|
|
this.options = parameters.options;
|
|
|
this.child_model_views = {};
|
|
|
this.child_views = {};
|
|
|
this.model.views.push(this);
|
|
|
this.id = this.id || IPython.utils.uuid();
|
|
|
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 return a child view.
|
|
|
//
|
|
|
// -given a model and (optionally) a view name if the view name is
|
|
|
// not given, it defaults to the model's default view attribute.
|
|
|
|
|
|
// TODO: this is hacky, and makes the view depend on this cell attribute and widget manager behavior
|
|
|
// it would be great to have the widget manager add the cell metadata
|
|
|
// to the subview without having to add it here.
|
|
|
options = $.extend({ parent: this }, options || {});
|
|
|
var child_view = this.model.widget_manager.create_view(child_model, options, this);
|
|
|
|
|
|
// Associate the view id with the model id.
|
|
|
if (this.child_model_views[child_model.id] === undefined) {
|
|
|
this.child_model_views[child_model.id] = [];
|
|
|
}
|
|
|
this.child_model_views[child_model.id].push(child_view.id);
|
|
|
|
|
|
// Remember the view by id.
|
|
|
this.child_views[child_view.id] = child_view;
|
|
|
return child_view;
|
|
|
},
|
|
|
|
|
|
pop_child_view: function(child_model) {
|
|
|
// Delete a child view that was previously created using create_child_view.
|
|
|
var view_ids = this.child_model_views[child_model.id];
|
|
|
if (view_ids !== undefined) {
|
|
|
|
|
|
// Only delete the first view in the list.
|
|
|
var view_id = view_ids[0];
|
|
|
var view = this.child_views[view_id];
|
|
|
delete this.child_views[view_id];
|
|
|
view_ids.splice(0,1);
|
|
|
child_model.views.pop(view);
|
|
|
|
|
|
// Remove the view list specific to this model if it is empty.
|
|
|
if (view_ids.length === 0) {
|
|
|
delete this.child_model_views[child_model.id];
|
|
|
}
|
|
|
return view;
|
|
|
}
|
|
|
return null;
|
|
|
},
|
|
|
|
|
|
do_diff: function(old_list, new_list, removed_callback, added_callback) {
|
|
|
// Difference a changed list and call remove and add callbacks for
|
|
|
// each removed and added item in the new list.
|
|
|
//
|
|
|
// Parameters
|
|
|
// ----------
|
|
|
// old_list : array
|
|
|
// new_list : array
|
|
|
// removed_callback : Callback(item)
|
|
|
// Callback that is called for each item removed.
|
|
|
// added_callback : Callback(item)
|
|
|
// Callback that is called for each item added.
|
|
|
|
|
|
// Walk the lists until an unequal entry is found.
|
|
|
var i;
|
|
|
for (i = 0; i < new_list.length; i++) {
|
|
|
if (i >= old_list.length || new_list[i] !== old_list[i]) {
|
|
|
break;
|
|
|
}
|
|
|
}
|
|
|
|
|
|
// Remove the non-matching items from the old list.
|
|
|
for (var j = i; j < old_list.length; j++) {
|
|
|
removed_callback(old_list[j]);
|
|
|
}
|
|
|
|
|
|
// Add the rest of the new list items.
|
|
|
for (; i < new_list.length; i++) {
|
|
|
added_callback(new_list[i]);
|
|
|
}
|
|
|
},
|
|
|
|
|
|
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
|
|
|
},
|
|
|
|
|
|
show: function(){
|
|
|
// Show the widget-area
|
|
|
if (this.options && this.options.cell &&
|
|
|
this.options.cell.widget_area !== undefined) {
|
|
|
this.options.cell.widget_area.show();
|
|
|
}
|
|
|
},
|
|
|
|
|
|
send: function (content) {
|
|
|
// Send a custom msg associated with this view.
|
|
|
this.model.send(content, this.callbacks());
|
|
|
},
|
|
|
|
|
|
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);
|
|
|
}
|
|
|
},
|
|
|
});
|
|
|
|
|
|
|
|
|
var DOMWidgetView = WidgetView.extend({
|
|
|
initialize: function (parameters) {
|
|
|
// Public constructor
|
|
|
DOMWidgetView.__super__.initialize.apply(this, [parameters]);
|
|
|
this.on('displayed', this.show, this);
|
|
|
this.after_displayed(function() {
|
|
|
this.update_visible(this.model, this.model.get("visible"));
|
|
|
this.update_css(this.model, this.model.get("_css"));
|
|
|
}, this);
|
|
|
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('children');
|
|
|
this.update_classes(old_classes, new_classes);
|
|
|
}, this);
|
|
|
this.model.on('change:fore_color', function (model, value) {
|
|
|
this.update_attr('color', value); }, this);
|
|
|
this.model.on('change:back_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', value); }, this);
|
|
|
this.model.on('change:font_family', function (model, value) {
|
|
|
this.update_attr('font-family', value); }, this);
|
|
|
this.update_classes([], this.model.get('_dom_classes'));
|
|
|
},
|
|
|
|
|
|
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
|
|
|
this.$el.toggle(value);
|
|
|
},
|
|
|
|
|
|
update_css: function (model, css) {
|
|
|
// Update the css styling of this view.
|
|
|
var e = this.$el;
|
|
|
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) {
|
|
|
// Update the DOM classes applied to the topmost element.
|
|
|
this.do_diff(old_classes, new_classes, function(removed) {
|
|
|
this.$el.removeClass(removed);
|
|
|
}, function(added) {
|
|
|
this.$el.addClass(added);
|
|
|
});
|
|
|
},
|
|
|
|
|
|
_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;
|
|
|
},
|
|
|
});
|
|
|
|
|
|
var widget = {
|
|
|
'WidgetModel': WidgetModel,
|
|
|
'WidgetView': WidgetView,
|
|
|
'DOMWidgetView': DOMWidgetView,
|
|
|
};
|
|
|
|
|
|
// For backwards compatability.
|
|
|
$.extend(IPython, widget);
|
|
|
|
|
|
return widget;
|
|
|
});
|
|
|
|
