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147 lines
3.6 KiB
147 lines
3.6 KiB
2 years ago
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'use strict';
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const { dirname, extname, join } = require('path');
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const { parse: yfm } = require('hexo-front-matter');
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const Promise = require('bluebird');
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const assignIn = (target, ...sources) => {
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const length = sources.length;
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if (length < 1 || target == null) return target;
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for (let i = 0; i < length; i++) {
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const source = sources[i];
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for (const key in source) {
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target[key] = source[key];
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}
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}
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return target;
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};
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class View {
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constructor(path, data) {
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this.path = path;
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this.source = join(this._theme.base, 'layout', path);
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this.data = typeof data === 'string' ? yfm(data) : data;
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this._precompile();
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}
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render(options = {}, callback) {
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if (!callback && typeof options === 'function') {
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callback = options;
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options = {};
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}
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const { data } = this;
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const { layout = options.layout } = data;
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const locals = this._buildLocals(options);
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return this._compiled(this._bindHelpers(locals)).then(result => {
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if (result == null || !layout) return result;
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const layoutView = this._resolveLayout(layout);
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if (!layoutView) return result;
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const layoutLocals = {
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...locals,
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body: result,
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layout: false
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};
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return layoutView.render(layoutLocals, callback);
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}).asCallback(callback);
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}
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renderSync(options = {}) {
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const { data } = this;
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const { layout = options.layout } = data;
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const locals = this._buildLocals(options);
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const result = this._compiledSync(this._bindHelpers(locals));
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if (result == null || !layout) return result;
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const layoutView = this._resolveLayout(layout);
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if (!layoutView) return result;
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const layoutLocals = {
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...locals,
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body: result,
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layout: false
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};
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return layoutView.renderSync(layoutLocals);
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}
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_buildLocals(locals) {
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// eslint-disable-next-line no-unused-vars
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const { layout, _content, ...data } = this.data;
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return assignIn({}, locals, data, {
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filename: this.source
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});
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}
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_bindHelpers(locals) {
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const helpers = this._helper.list();
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const keys = Object.keys(helpers);
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for (const key of keys) {
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locals[key] = helpers[key].bind(locals);
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}
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return locals;
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}
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_resolveLayout(name) {
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// Relative path
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const layoutPath = join(dirname(this.path), name);
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let layoutView = this._theme.getView(layoutPath);
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if (layoutView && layoutView.source !== this.source) return layoutView;
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// Absolute path
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layoutView = this._theme.getView(name);
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if (layoutView && layoutView.source !== this.source) return layoutView;
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}
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_precompile() {
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const render = this._render;
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const ctx = render.context;
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const ext = extname(this.path);
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const renderer = render.getRenderer(ext);
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const data = {
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path: this.source,
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text: this.data._content
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};
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function buildFilterArguments(result) {
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const output = render.getOutput(ext) || ext;
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return [
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`after_render:${output}`,
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result,
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{
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context: ctx,
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args: [data]
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}
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];
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}
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if (renderer && typeof renderer.compile === 'function') {
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const compiled = renderer.compile(data);
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this._compiledSync = locals => {
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const result = compiled(locals);
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return ctx.execFilterSync(...buildFilterArguments(result));
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};
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this._compiled = locals => Promise.resolve(compiled(locals))
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.then(result => ctx.execFilter(...buildFilterArguments(result)));
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} else {
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this._compiledSync = locals => render.renderSync(data, locals);
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this._compiled = locals => render.render(data, locals);
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}
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}
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}
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module.exports = View;
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