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/*******************************************************************************
* Copyright (c) 2015 itemis AG (http://www.itemis.eu) and others.
* This program and the accompanying materials are made available under the
* terms of the Eclipse Public License 2.0 which is available at
* http://www.eclipse.org/legal/epl-2.0.
*
* SPDX-License-Identifier: EPL-2.0
*******************************************************************************/
define(['xtext/services/XtextService', 'jquery'], function(XtextService, jQuery) {
/**
* Service class for content assist proposals. The proposals are returned as promise of
* a Deferred object.
*/
function ContentAssistService(serviceUrl, resourceId, updateService) {
this.initialize(serviceUrl, 'assist', resourceId, updateService);
}
ContentAssistService.prototype = new XtextService();
ContentAssistService.prototype.invoke = function(editorContext, params, deferred) {
if (deferred === undefined) {
deferred = jQuery.Deferred();
}
var serverData = {
contentType: params.contentType
};
if (params.offset)
serverData.caretOffset = params.offset;
else
serverData.caretOffset = editorContext.getCaretOffset();
var selection = params.selection ? params.selection : editorContext.getSelection();
if (selection.start != serverData.caretOffset || selection.end != serverData.caretOffset) {
serverData.selectionStart = selection.start;
serverData.selectionEnd = selection.end;
}
var currentText;
var httpMethod = 'GET';
var onComplete = undefined;
var knownServerState = editorContext.getServerState();
if (params.sendFullText) {
serverData.fullText = editorContext.getText();
httpMethod = 'POST';
} else {
serverData.requiredStateId = knownServerState.stateId;
if (this._updateService) {
if (knownServerState.text === undefined || knownServerState.updateInProgress) {
var self = this;
this._updateService.addCompletionCallback(function() {
self.invoke(editorContext, params, deferred);
});
return deferred.promise();
}
knownServerState.updateInProgress = true;
onComplete = this._updateService.onComplete.bind(this._updateService);
currentText = editorContext.getText();
this._updateService.computeDelta(knownServerState.text, currentText, serverData);
if (serverData.deltaText !== undefined) {
httpMethod = 'POST';
}
}
}
var self = this;
self.sendRequest(editorContext, {
type: httpMethod,
data: serverData,
success: function(result) {
if (result.conflict) {
// The server has lost its session state and the resource is loaded from the server
if (self._increaseRecursionCount(editorContext)) {
if (onComplete) {
delete knownServerState.updateInProgress;
delete knownServerState.text;
delete knownServerState.stateId;
self._updateService.addCompletionCallback(function() {
self.invoke(editorContext, params, deferred);
});
self._updateService.invoke(editorContext, params);
} else {
var paramsCopy = {};
for (var p in params) {
if (params.hasOwnProperty(p))
paramsCopy[p] = params[p];
}
paramsCopy.sendFullText = true;
self.invoke(editorContext, paramsCopy, deferred);
}
} else {
deferred.reject(result.conflict);
}
return false;
}
if (onComplete && result.stateId !== undefined && result.stateId != editorContext.getServerState().stateId) {
var listeners = editorContext.updateServerState(currentText, result.stateId);
for (var i = 0; i < listeners.length; i++) {
self._updateService.addCompletionCallback(listeners[i], params);
}
}
deferred.resolve(result.entries);
},
error: function(xhr, textStatus, errorThrown) {
if (onComplete && xhr.status == 404 && !params.loadFromServer && knownServerState.text !== undefined) {
// The server has lost its session state and the resource is not loaded from the server
delete knownServerState.updateInProgress;
delete knownServerState.text;
delete knownServerState.stateId;
self._updateService.addCompletionCallback(function() {
self.invoke(editorContext, params, deferred);
});
self._updateService.invoke(editorContext, params);
return true;
}
deferred.reject(errorThrown);
},
complete: onComplete
}, !params.sendFullText);
var result = deferred.promise();
if (onComplete) {
result.always(function() {
knownServerState.updateInProgress = false;
});
}
return result;
};
return ContentAssistService;
});
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