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svelte
mirror of https://github.com/sveltejs/svelte
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Code Issues Projects Releases Wiki Activity

move generate/index.js over to CodeBuilder

Browse Source
pull/183/head
Rich-Harris 8 years ago
parent a1225d5adf
commit 18baae69c1
1 changed files with 48 additions and 56 deletions
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84
src/generate/index.js
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@ -1,5 +1,6 @@
import MagicString, { Bundle } from 'magic-string';
import { walk } from 'estree-walker';
import CodeBuilder from '../utils/CodeBuilder.js';
import deindent from '../utils/deindent.js';
import isReference from '../utils/isReference.js';
import counter from './utils/counter.js';
@ -304,15 +305,17 @@ export default function generate ( parsed, source, options, names ) {
generator.addRenderer( generator.pop() );
const topLevelStatements = [];
const builders = {
main: new CodeBuilder(),
init: new CodeBuilder(),
set: new CodeBuilder()
};
const setStatements = [ deindent`
var oldState = state;
state = Object.assign( {}, oldState, newState );
` ];
builders.set.addLine( 'var oldState = state;' );
builders.set.addLine( 'state = Object.assign( {}, oldState, newState );' );
if ( templateProperties.computed ) {
const statements = [];
const builder = new CodeBuilder();
const dependencies = new Map();
templateProperties.computed.properties.forEach( prop => {
@ -334,7 +337,7 @@ export default function generate ( parsed, source, options, names ) {
const deps = dependencies.get( key );
deps.forEach( visit );
statements.push( deindent`
builder.addBlock( deindent`
if ( ${deps.map( dep => `( '${dep}' in newState && typeof state.${dep} === 'object' || state.${dep} !== oldState.${dep} )` ).join( ' || ' )} ) {
state.${key} = newState.${key} = template.computed.${key}( ${deps.map( dep => `state.${dep}` ).join( ', ' )} );
}
@ -343,25 +346,25 @@ export default function generate ( parsed, source, options, names ) {
templateProperties.computed.properties.forEach( prop => visit( prop.key.name ) );
topLevelStatements.push( deindent`
builders.main.addBlock( deindent`
function applyComputations ( state, newState, oldState ) {
${statements.join( '\n\n' )}
${builder}
}
` );
setStatements.push( `applyComputations( state, newState, oldState )` );
builders.set.addLine( `applyComputations( state, newState, oldState )` );
}
setStatements.push( deindent`
builders.set.addBlock( deindent`
dispatchObservers( observers.immediate, newState, oldState );
if ( mainFragment ) mainFragment.update( newState, state );
dispatchObservers( observers.deferred, newState, oldState );
` );
const importBlock = imports
.map( ( declaration, i ) => {
imports.forEach( ( declaration, i ) => {
if ( format === 'es' ) {
return source.slice( declaration.start, declaration.end );
builders.main.addLine( source.slice( declaration.start, declaration.end ) );
return;
}
const defaultImport = declaration.specifiers.find( x => x.type === 'ImportDefaultSpecifier' || x.type === 'ImportSpecifier' && x.imported.name === 'default' );
@ -371,29 +374,21 @@ export default function generate ( parsed, source, options, names ) {
const name = ( defaultImport || namespaceImport ) ? ( defaultImport || namespaceImport ).local.name : `__import${i}`;
declaration.name = name; // hacky but makes life a bit easier later
const statements = namedImports.map( specifier => {
return `var ${specifier.local.name} = ${name}.${specifier.imported.name}`;
namedImports.forEach( specifier => {
builders.main.addLine( `var ${specifier.local.name} = ${name}.${specifier.imported.name}` );
});
if ( defaultImport ) {
statements.push( `${name} = ( ${name} && ${name}.__esModule ) ? ${name}['default'] : ${name};` );
builders.main.addLine( `${name} = ( ${name} && ${name}.__esModule ) ? ${name}['default'] : ${name};` );
}
return statements.join( '\n' );
})
.filter( Boolean )
.join( '\n' );
});
if ( parsed.js ) {
if ( imports.length ) {
topLevelStatements.push( importBlock );
}
topLevelStatements.push( `[✂${parsed.js.content.start}-${parsed.js.content.end}✂]` );
builders.main.addBlock( `[✂${parsed.js.content.start}-${parsed.js.content.end}✂]` );
}
if ( parsed.css && options.css !== false ) {
topLevelStatements.push( deindent`
builders.main.addBlock( deindent`
let addedCss = false;
function addCss () {
var style = document.createElement( 'style' );
@ -405,33 +400,30 @@ export default function generate ( parsed, source, options, names ) {
` );
}
topLevelStatements.push( ...renderers.reverse() );
let i = renderers.length;
while ( i-- ) builders.main.addBlock( renderers[i] );
const constructorName = options.name || 'SvelteComponent';
const initStatements = [];
if ( parsed.css && options.css !== false ) {
initStatements.push( `if ( !addedCss ) addCss();` );
builders.init.addLine( `if ( !addedCss ) addCss();` );
}
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 );
` );
@ -445,12 +437,12 @@ 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 {
@ -461,7 +453,7 @@ 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 || {};
@ -512,7 +504,7 @@ 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 ) {
@ -562,15 +554,15 @@ 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+)$/;

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