/
builder.js
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/
builder.js
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var view = require("ui/core/view");
var fs = require("file-system");
var xml = require("xml");
var file_access_module = require("file-system/file-system-access");
var types = require("utils/types");
var componentBuilder = require("ui/builder/component-builder");
var templateBuilderDef = require("ui/builder/template-builder");
var KNOWNCOLLECTIONS = "knownCollections";
function parse(value, exports) {
var viewToReturn;
if (exports instanceof view.View) {
exports = getExports(exports);
}
var componentModule = parseInternal(value, exports);
if (componentModule) {
viewToReturn = componentModule.component;
}
return viewToReturn;
}
exports.parse = parse;
function parseInternal(value, exports) {
var rootComponentModule;
var parents = new Array();
var complexProperties = new Array();
var templateBuilder;
var xmlParser = new xml.XmlParser(function (args) {
if (templateBuilder) {
if (args.eventType === xml.ParserEventType.StartElement) {
templateBuilder.addStartElement(args.prefix, args.namespace, args.elementName, args.attributes);
}
else if (args.eventType === xml.ParserEventType.EndElement) {
if (templateBuilder.elementName !== args.elementName) {
templateBuilder.addEndElement(args.prefix, args.elementName);
}
else {
templateBuilder.build();
templateBuilder = undefined;
}
}
}
var parent = parents[parents.length - 1];
var complexProperty = complexProperties[complexProperties.length - 1];
if (args.eventType === xml.ParserEventType.StartElement) {
if (isComplexProperty(args.elementName)) {
var name = getComplexProperty(args.elementName);
complexProperties.push({
parent: parent,
name: name,
items: [],
});
if (templateBuilderDef.isKnownTemplate(name, parent.exports)) {
templateBuilder = new templateBuilderDef.TemplateBuilder({
parent: parent,
name: name,
elementName: args.elementName,
templateItems: []
});
}
}
else {
var componentModule;
if (args.prefix) {
var ns = args.namespace;
if (ns) {
var xmlPath = fs.path.join(fs.knownFolders.currentApp().path, ns, args.elementName) + ".xml";
if (fs.File.exists(xmlPath)) {
var jsPath = xmlPath.replace(".xml", ".js");
var subExports;
if (fs.File.exists(jsPath)) {
subExports = require(jsPath.replace(".js", ""));
}
componentModule = loadInternal(xmlPath, subExports);
if (types.isDefined(componentModule) && types.isDefined(componentModule.component)) {
var attr;
for (attr in args.attributes) {
componentBuilder.setPropertyValue(componentModule.component, subExports, exports, attr, args.attributes[attr]);
}
}
}
else {
componentModule = componentBuilder.getComponentModule(args.elementName, ns, args.attributes, exports);
}
}
}
else {
componentModule = componentBuilder.getComponentModule(args.elementName, ns, args.attributes, exports);
}
if (componentModule) {
if (parent) {
if (componentModule.component instanceof view.View) {
if (complexProperty) {
addToComplexProperty(parent, complexProperty, componentModule);
}
else if (parent.component._addChildFromBuilder) {
parent.component._addChildFromBuilder(args.elementName, componentModule.component);
}
}
else if (complexProperty) {
addToComplexProperty(parent, complexProperty, componentModule);
}
}
else if (parents.length === 0) {
rootComponentModule = componentModule;
}
parents.push(componentModule);
}
}
}
else if (args.eventType === xml.ParserEventType.EndElement) {
if (isComplexProperty(args.elementName)) {
if (complexProperty) {
if (parent && parent.component._addArrayFromBuilder) {
parent.component._addArrayFromBuilder(complexProperty.name, complexProperty.items);
complexProperty.items = [];
}
}
complexProperties.pop();
}
else {
parents.pop();
}
}
}, function (e) {
throw new Error("XML parse error: " + e.message);
}, true);
if (types.isString(value)) {
value = value.replace(/xmlns=("|')http:\/\/www.nativescript.org\/tns.xsd\1/, "");
xmlParser.parse(value);
}
return rootComponentModule;
}
function load(fileName, exports) {
var viewToReturn;
var componentModule = loadInternal(fileName, exports);
if (componentModule) {
viewToReturn = componentModule.component;
}
return viewToReturn;
}
exports.load = load;
function loadInternal(fileName, exports) {
var componentModule;
if (fileName && fs.File.exists(fileName)) {
var fileAccess = new file_access_module.FileSystemAccess();
fileAccess.readText(fileName, function (result) {
componentModule = parseInternal(result, exports);
}, function (e) {
throw new Error("Error loading file " + fileName + " :" + e.message);
});
}
if (componentModule && componentModule.component) {
componentModule.component.exports = exports;
}
return componentModule;
}
function isComplexProperty(name) {
return types.isString(name) && name.indexOf(".") !== -1;
}
function getComplexProperty(fullName) {
var name;
if (types.isString(fullName)) {
var names = fullName.split(".");
name = names[names.length - 1];
}
return name;
}
function isKnownCollection(name, exports) {
return KNOWNCOLLECTIONS in exports && exports[KNOWNCOLLECTIONS] && name in exports[KNOWNCOLLECTIONS];
}
function addToComplexProperty(parent, complexProperty, elementModule) {
var parentComponent = parent.component;
if (isKnownCollection(complexProperty.name, parent.exports)) {
complexProperty.items.push(elementModule.component);
}
else if (parentComponent._addChildFromBuilder) {
parentComponent._addChildFromBuilder("", elementModule.component);
}
else {
parentComponent[complexProperty.name] = elementModule.component;
}
}
function getExports(instance) {
var parent = instance.parent;
while (parent && parent.exports === undefined) {
parent = parent.parent;
}
return parent ? parent.exports : undefined;
}