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@ -1,224 +1,17 @@
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import MagicString, { Bundle } from 'magic-string';
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import { walk } from 'estree-walker';
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import CodeBuilder from '../utils/CodeBuilder.js';
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import deindent from '../utils/deindent.js';
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import isReference from '../utils/isReference.js';
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import counter from './utils/counter.js';
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import flattenReference from '../utils/flattenReference.js';
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import namespaces from '../utils/namespaces.js';
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import globalWhitelist from '../utils/globalWhitelist.js';
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import getIntro from './utils/getIntro.js';
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import getOutro from './utils/getOutro.js';
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import visitors from './visitors/index.js';
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import processCss from './css/process.js';
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import createGenerator from './createGenerator.js';
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export default function generate ( parsed, source, options, names ) {
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const format = options.format || 'es';
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const renderers = [];
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const generator = {
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addElement ( name, renderStatement, needsIdentifier = false ) {
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const isToplevel = generator.current.localElementDepth === 0;
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if ( needsIdentifier || isToplevel ) {
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generator.current.initStatements.push( deindent`
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var ${name} = ${renderStatement};
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` );
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generator.createMountStatement( name );
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} else {
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generator.current.initStatements.push( deindent`
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${generator.current.target}.appendChild( ${renderStatement} );
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` );
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}
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if ( isToplevel ) {
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generator.current.detachStatements.push( deindent`
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${name}.parentNode.removeChild( ${name} );
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` );
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}
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},
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createMountStatement ( name ) {
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if ( generator.current.target === 'target' ) {
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generator.current.mountStatements.push( deindent`
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target.insertBefore( ${name}, anchor );
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` );
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} else {
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generator.current.initStatements.push( deindent`
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${generator.current.target}.appendChild( ${name} );
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` );
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}
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},
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createAnchor ( _name, description = '' ) {
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const name = `${_name}_anchor`;
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const statement = `document.createComment( ${JSON.stringify( description )} )`;
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generator.addElement( name, statement, true );
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return name;
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},
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generateBlock ( node, name ) {
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generator.push({
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name,
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target: 'target',
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localElementDepth: 0,
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initStatements: [],
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mountStatements: [],
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updateStatements: [],
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detachStatements: [],
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teardownStatements: [],
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getUniqueName: generator.getUniqueNameMaker()
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});
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// walk the children here
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node.children.forEach( generator.visit );
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generator.addRenderer( generator.current );
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generator.pop();
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// unset the children, to avoid them being visited again
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node.children = [];
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},
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addRenderer ( fragment ) {
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if ( fragment.autofocus ) {
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fragment.initStatements.push( `${fragment.autofocus}.focus();` );
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}
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const detachStatements = fragment.detachStatements.join( '\n\n' );
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const teardownStatements = fragment.teardownStatements.join( '\n\n' );
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const detachBlock = deindent`
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if ( detach ) {
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${detachStatements}
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}
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`;
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const teardownBlock = deindent`
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${teardownStatements}${detachStatements ? `\n\n${detachBlock}` : ``}
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`;
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renderers.push( deindent`
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function ${fragment.name} ( ${fragment.params}, component ) {
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${fragment.initStatements.join( '\n\n' )}
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return {
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mount: function ( target, anchor ) {
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${fragment.mountStatements.join( '\n\n' )}
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},
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update: function ( changed, ${fragment.params} ) {
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${fragment.updateStatements.join( '\n\n' )}
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},
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teardown: function ( detach ) {
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${teardownBlock}
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}
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};
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}
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` );
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},
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addSourcemapLocations ( node ) {
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walk( node, {
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enter ( node ) {
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generator.code.addSourcemapLocation( node.start );
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generator.code.addSourcemapLocation( node.end );
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}
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});
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},
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code: new MagicString( source ),
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components: {},
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contextualise ( expression, isEventHandler ) {
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const usedContexts = [];
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const dependencies = [];
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const { contextDependencies, contexts, indexes } = generator.current;
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walk( expression, {
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enter ( node, parent ) {
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if ( isReference( node, parent ) ) {
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const { name } = flattenReference( node );
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if ( parent && parent.type === 'CallExpression' && node === parent.callee && generator.helpers[ name ] ) {
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generator.code.prependRight( node.start, `template.helpers.` );
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return;
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}
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if ( name === 'event' && isEventHandler ) {
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return;
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}
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if ( contexts[ name ] ) {
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dependencies.push( ...contextDependencies[ name ] );
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if ( !~usedContexts.indexOf( name ) ) usedContexts.push( name );
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} else if ( indexes[ name ] ) {
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const context = indexes[ name ];
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if ( !~usedContexts.indexOf( context ) ) usedContexts.push( context );
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} else if ( !globalWhitelist[ name ] ) {
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dependencies.push( name );
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generator.code.prependRight( node.start, `root.` );
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if ( !~usedContexts.indexOf( 'root' ) ) usedContexts.push( 'root' );
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}
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this.skip();
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}
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}
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});
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return {
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dependencies,
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contexts: usedContexts,
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snippet: `[✂${expression.start}-${expression.end}✂]`,
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string: generator.code.slice( expression.start, expression.end )
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};
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},
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events: {},
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getUniqueName: counter( names ),
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getUniqueNameMaker () {
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return counter( names );
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},
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cssId: parsed.css ? `svelte-${parsed.hash}` : '',
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helpers: {},
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pop () {
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const tail = generator.current;
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generator.current = tail.parent;
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return tail;
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},
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push ( fragment ) {
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const newFragment = Object.assign( {}, generator.current, fragment, {
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parent: generator.current
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});
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generator.current = newFragment;
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},
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usesRefs: false,
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source,
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visit ( node ) {
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const visitor = visitors[ node.type ];
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if ( !visitor ) throw new Error( `Not implemented: ${node.type}` );
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if ( visitor.enter ) visitor.enter( generator, node );
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if ( node.children ) {
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node.children.forEach( child => {
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generator.visit( child );
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});
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}
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if ( visitor.leave ) visitor.leave( generator, node );
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}
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};
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const generator = createGenerator( parsed, source, names );
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const templateProperties = {};
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const imports = [];
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@ -294,12 +87,6 @@ export default function generate ( parsed, source, options, names ) {
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elementDepth: 0,
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localElementDepth: 0,
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initStatements: [],
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mountStatements: [],
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updateStatements: [],
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detachStatements: [],
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teardownStatements: [],
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contexts: {},
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indexes: {},
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@ -307,6 +94,7 @@ export default function generate ( parsed, source, options, names ) {
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indexNames: {},
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listNames: {},
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builders: generator.getBuilders(),
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getUniqueName: generator.getUniqueNameMaker()
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});
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@ -314,15 +102,17 @@ export default function generate ( parsed, source, options, names ) {
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generator.addRenderer( generator.pop() );
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const topLevelStatements = [];
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const builders = {
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main: new CodeBuilder(),
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init: new CodeBuilder(),
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set: new CodeBuilder()
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};
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const setStatements = [ deindent`
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var oldState = state;
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state = Object.assign( {}, oldState, newState );
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` ];
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builders.set.addLine( 'var oldState = state;' );
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builders.set.addLine( 'state = Object.assign( {}, oldState, newState );' );
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if ( templateProperties.computed ) {
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const statements = [];
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const builder = new CodeBuilder();
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const dependencies = new Map();
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templateProperties.computed.properties.forEach( prop => {
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@ -344,7 +134,7 @@ export default function generate ( parsed, source, options, names ) {
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const deps = dependencies.get( key );
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deps.forEach( visit );
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statements.push( deindent`
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builder.addBlock( deindent`
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if ( ${deps.map( dep => `( '${dep}' in newState && typeof state.${dep} === 'object' || state.${dep} !== oldState.${dep} )` ).join( ' || ' )} ) {
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state.${key} = newState.${key} = template.computed.${key}( ${deps.map( dep => `state.${dep}` ).join( ', ' )} );
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}
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@ -353,57 +143,49 @@ export default function generate ( parsed, source, options, names ) {
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templateProperties.computed.properties.forEach( prop => visit( prop.key.name ) );
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topLevelStatements.push( deindent`
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builders.main.addBlock( deindent`
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function applyComputations ( state, newState, oldState ) {
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${statements.join( '\n\n' )}
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${builder}
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}
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` );
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setStatements.push( `applyComputations( state, newState, oldState )` );
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builders.set.addLine( `applyComputations( state, newState, oldState )` );
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}
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setStatements.push( deindent`
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builders.set.addBlock( deindent`
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dispatchObservers( observers.immediate, newState, oldState );
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if ( mainFragment ) mainFragment.update( newState, state );
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dispatchObservers( observers.deferred, newState, oldState );
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` );
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const importBlock = imports
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.map( ( declaration, i ) => {
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if ( format === 'es' ) {
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return source.slice( declaration.start, declaration.end );
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}
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const defaultImport = declaration.specifiers.find( x => x.type === 'ImportDefaultSpecifier' || x.type === 'ImportSpecifier' && x.imported.name === 'default' );
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const namespaceImport = declaration.specifiers.find( x => x.type === 'ImportNamespaceSpecifier' );
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const namedImports = declaration.specifiers.filter( x => x.type === 'ImportSpecifier' && x.imported.name !== 'default' );
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imports.forEach( ( declaration, i ) => {
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if ( format === 'es' ) {
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builders.main.addLine( source.slice( declaration.start, declaration.end ) );
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return;
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}
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const name = ( defaultImport || namespaceImport ) ? ( defaultImport || namespaceImport ).local.name : `__import${i}`;
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declaration.name = name; // hacky but makes life a bit easier later
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const defaultImport = declaration.specifiers.find( x => x.type === 'ImportDefaultSpecifier' || x.type === 'ImportSpecifier' && x.imported.name === 'default' );
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const namespaceImport = declaration.specifiers.find( x => x.type === 'ImportNamespaceSpecifier' );
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const namedImports = declaration.specifiers.filter( x => x.type === 'ImportSpecifier' && x.imported.name !== 'default' );
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const statements = namedImports.map( specifier => {
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return `var ${specifier.local.name} = ${name}.${specifier.imported.name}`;
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});
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const name = ( defaultImport || namespaceImport ) ? ( defaultImport || namespaceImport ).local.name : `__import${i}`;
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declaration.name = name; // hacky but makes life a bit easier later
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if ( defaultImport ) {
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statements.push( `${name} = ( ${name} && ${name}.__esModule ) ? ${name}['default'] : ${name};` );
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}
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return statements.join( '\n' );
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})
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.filter( Boolean )
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.join( '\n' );
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namedImports.forEach( specifier => {
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builders.main.addLine( `var ${specifier.local.name} = ${name}.${specifier.imported.name}` );
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});
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if ( parsed.js ) {
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if ( imports.length ) {
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topLevelStatements.push( importBlock );
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if ( defaultImport ) {
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builders.main.addLine( `${name} = ( ${name} && ${name}.__esModule ) ? ${name}['default'] : ${name};` );
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}
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});
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topLevelStatements.push( `[✂${parsed.js.content.start}-${parsed.js.content.end}✂]` );
|
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|
if ( parsed.js ) {
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|
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builders.main.addBlock( `[✂${parsed.js.content.start}-${parsed.js.content.end}✂]` );
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}
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if ( parsed.css && options.css !== false ) {
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topLevelStatements.push( deindent`
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|
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|
|
builders.main.addBlock( deindent`
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|
|
let addedCss = false;
|
|
|
|
|
function addCss () {
|
|
|
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|
var style = document.createElement( 'style' );
|
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|
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|
@ -415,33 +197,30 @@ export default function generate ( parsed, source, options, names ) {
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` );
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}
|
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|
topLevelStatements.push( ...renderers.reverse() );
|
|
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|
let i = generator.renderers.length;
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|
while ( i-- ) builders.main.addBlock( generator.renderers[i] );
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const constructorName = options.name || 'SvelteComponent';
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const initStatements = [];
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|
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|
if ( parsed.css && options.css !== false ) {
|
|
|
|
|
initStatements.push( `if ( !addedCss ) addCss();` );
|
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|
|
builders.init.addLine( `if ( !addedCss ) addCss();` );
|
|
|
|
|
}
|
|
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|
|
|
|
|
|
|
if ( generator.hasComponents ) {
|
|
|
|
|
initStatements.push( deindent`
|
|
|
|
|
this.__renderHooks = [];
|
|
|
|
|
` );
|
|
|
|
|
builders.init.addLine( `this.__renderHooks = [];` );
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
if ( generator.hasComplexBindings ) {
|
|
|
|
|
initStatements.push( deindent`
|
|
|
|
|
builders.init.addBlock( deindent`
|
|
|
|
|
this.__bindings = [];
|
|
|
|
|
var mainFragment = renderMainFragment( state, this );
|
|
|
|
|
if ( options.target ) this._mount( options.target );
|
|
|
|
|
while ( this.__bindings.length ) this.__bindings.pop()();
|
|
|
|
|
` );
|
|
|
|
|
|
|
|
|
|
setStatements.push( `while ( this.__bindings.length ) this.__bindings.pop()();` );
|
|
|
|
|
builders.set.addLine( `while ( this.__bindings.length ) this.__bindings.pop()();` );
|
|
|
|
|
} else {
|
|
|
|
|
initStatements.push( deindent`
|
|
|
|
|
builders.init.addBlock( deindent`
|
|
|
|
|
var mainFragment = renderMainFragment( state, this );
|
|
|
|
|
if ( options.target ) this._mount( options.target );
|
|
|
|
|
` );
|
|
|
|
|
@ -455,12 +234,12 @@ export default function generate ( parsed, source, options, names ) {
|
|
|
|
|
}
|
|
|
|
|
`;
|
|
|
|
|
|
|
|
|
|
initStatements.push( statement );
|
|
|
|
|
setStatements.push( statement );
|
|
|
|
|
builders.init.addBlock( statement );
|
|
|
|
|
builders.set.addBlock( statement );
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
if ( templateProperties.onrender ) {
|
|
|
|
|
initStatements.push( deindent`
|
|
|
|
|
builders.init.addBlock( deindent`
|
|
|
|
|
if ( options.root ) {
|
|
|
|
|
options.root.__renderHooks.push({ fn: template.onrender, context: this });
|
|
|
|
|
} else {
|
|
|
|
|
@ -471,7 +250,7 @@ export default function generate ( parsed, source, options, names ) {
|
|
|
|
|
|
|
|
|
|
const initialState = templateProperties.data ? `Object.assign( template.data(), options.data )` : `options.data || {}`;
|
|
|
|
|
|
|
|
|
|
topLevelStatements.push( deindent`
|
|
|
|
|
builders.main.addBlock( deindent`
|
|
|
|
|
function ${constructorName} ( options ) {
|
|
|
|
|
options = options || {};
|
|
|
|
|
|
|
|
|
|
@ -522,7 +301,7 @@ export default function generate ( parsed, source, options, names ) {
|
|
|
|
|
};
|
|
|
|
|
|
|
|
|
|
this.set = function set ( newState ) {
|
|
|
|
|
${setStatements.join( '\n\n' )}
|
|
|
|
|
${builders.set}
|
|
|
|
|
};
|
|
|
|
|
|
|
|
|
|
this._mount = function mount ( target, anchor ) {
|
|
|
|
|
@ -572,15 +351,15 @@ export default function generate ( parsed, source, options, names ) {
|
|
|
|
|
this.root = options.root;
|
|
|
|
|
this.yield = options.yield;
|
|
|
|
|
|
|
|
|
|
${initStatements.join( '\n\n' )}
|
|
|
|
|
${builders.init}
|
|
|
|
|
}
|
|
|
|
|
` );
|
|
|
|
|
|
|
|
|
|
if ( templateProperties.methods ) {
|
|
|
|
|
topLevelStatements.push( `${constructorName}.prototype = template.methods;` );
|
|
|
|
|
builders.main.addBlock( `${constructorName}.prototype = template.methods;` );
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
const result = topLevelStatements.join( '\n\n' );
|
|
|
|
|
const result = builders.main.toString();
|
|
|
|
|
|
|
|
|
|
const pattern = /\[✂(\d+)-(\d+)$/;
|
|
|
|
|
|
|
|
|
|
|
Rich Harris
8 years ago