162 lines
3.6 KiB
JavaScript
162 lines
3.6 KiB
JavaScript
const VnObject = require('./object');
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const kebabToCamel = require('./string-util').kebabToCamel;
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let scopeUid = 0;
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module.exports = new Class({
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Extends: VnObject
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,initialize: function(builder, doc, objects, exprValues, thisArg, parent) {
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this.builder = builder;
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this.objects = objects;
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this.exprValues = exprValues;
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this.thisArg = thisArg;
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this.parent = parent;
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this.uid = ++scopeUid;
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this.$ = parent ? Object.create(parent.$) : {};
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if (parent) {
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parent.ref();
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// XXX: Keep commented until optimized
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//parent.on('change', this.onChange, this);
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if (!thisArg) this.thisArg = parent.thisArg;
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}
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const contexts = builder._contexts;
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for (let i = 0; i < contexts.length; i++) {
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const context = contexts[i];
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objects[i] = context.compiler.instantiate(doc, context, this);
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}
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}
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,link: function(extraObjects) {
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var contextMap = this.builder._contextMap;
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for (var id in extraObjects)
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this.$[id] = extraObjects[id];
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for (var id in contextMap)
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this.$[id] = this.objects[contextMap[id]];
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const builder = this.builder;
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const contexts = builder._contexts;
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const objects = this.objects;
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for (const compiler of builder._compilers)
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compiler.preLink(this);
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for (let i = 0; i < contexts.length; i++) {
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const context = contexts[i];
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context.compiler.link(context, objects[i], objects, this);
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}
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for (let i = 0; i < contexts.length; i++) {
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const context = contexts[i];
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context.compiler.connect(context, objects[i], objects, this);
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}
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for (const compiler of builder._compilers)
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compiler.postLink(this);
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this.digest();
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for (const object of this.objects)
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if (object.assignLot)
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object.on('change', this.onChange, this);
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}
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,digest() {
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const exprContexts = this.builder._exprContexts;
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const exprValues = this.exprValues;
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const objects = this.objects;
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for (let i = 0; i < exprContexts.length; i++) {
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const exprContext = exprContexts[i];
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let newValue;
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if (exprContext.template) {
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const values = [];
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let isEmpty = false;
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for (expr of exprContext.exprs) {
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const value = this.execExpr(expr);
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if (value == null) {
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isEmpty = true;
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break;
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}
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values.push(value);
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}
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if (!isEmpty) {
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let k = 0;
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newValue = exprContext.template.replace(/{{\d+}}/g, function() {
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return values[k++];
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});
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} else
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newValue = '';
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} else
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newValue = this.execExpr(exprContext.expr);
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if (newValue !== exprValues[i]) {
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const context = exprContext.context;
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context.compiler.setProperty(objects[context.id],
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exprContext.property, newValue);
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exprValues[i] = newValue;
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}
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}
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}
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,execExpr(expr) {
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try {
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return expr.call(this.thisArg, this.$);
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// eslint-disable-next-line no-empty
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} catch (e) {}
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}
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,onChange() {
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this.emit('change');
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this.digest();
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}
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,getMain: function() {
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return this.objects[this.builder._mainContext];
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}
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,getById: function(objectId) {
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if (!objectId) return null;
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return this.$[kebabToCamel(objectId)];
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}
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,getByTagName: function(tagName) {
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const tags = this.builder._tags[tagName];
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if (tags) {
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const arr = new Array(tags.length);
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for (let i = 0; i < tags.length; i++)
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arr[i] = this.objects[tags[i]];
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return arr;
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}
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return [];
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}
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,getHtmlId: function(nodeId) {
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return 'vn-'+ this.uid +'-'+ nodeId;
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}
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,_destroy: function() {
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for (const object of this.objects)
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if (object instanceof VnObject) {
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object.disconnectByInstance(this);
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object.unref();
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}
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if (this.parent) {
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this.parent.disconnectByInstance(this);
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this.parent.unref();
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}
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VnObject.prototype._destroy.call(this);
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}
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});
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