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svelte
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move component codegen into its own file

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pull/111/head
Arpad Borsos 8 years ago
parent 5770048855
commit b75bb29408
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GPG Key ID: 908EDF65263368B4
2 changed files with 156 additions and 117 deletions
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111
compiler/generate/visitors/Component.js
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@ -0,0 +1,111 @@
import deindent from '../utils/deindent.js';
import addComponentAttributes from './attributes/addComponentAttributes.js';
export default {
enter ( generator, node ) {
const name = generator.current.counter( `${node.name[0].toLowerCase()}${node.name.slice( 1 )}` );
const local = {
name,
namespace: generator.current.namespace,
isComponent: true,
allUsedContexts: new Set(),
init: [],
mount: [],
update: [],
teardown: []
};
const isToplevel = generator.current.localElementDepth === 0;
generator.hasComponents = true;
addComponentAttributes( generator, node, local );
if ( local.staticAttributes.length || local.dynamicAttributes.length || local.bindings.length ) {
const initialProps = local.staticAttributes
.concat( local.dynamicAttributes )
.map( attribute => `${attribute.name}: ${attribute.value}` );
const statements = [];
if ( initialProps.length ) {
statements.push( deindent`
var ${name}_initialData = {
${initialProps.join( ',\n' )}
};
` );
} else {
statements.push( `var ${name}_initialData = {};` );
}
if ( local.bindings.length ) {
const bindings = local.bindings.map( binding => {
const parts = binding.value.split( '.' );
const tail = parts.pop();
return `if ( '${tail}' in ${parts.join( '.' )} ) ${name}_initialData.${binding.name} = ${binding.value};`;
});
statements.push( bindings.join( '\n' ) );
}
local.init.unshift( deindent`
${statements.join( '\n\n' )}
var ${name} = new template.components.${node.name}({
target: ${!isToplevel ? generator.current.target: 'null'},
root: component.root || component,
data: ${name}_initialData
});
` );
} else {
local.init.unshift( deindent`
var ${name} = new template.components.${node.name}({
target: ${!isToplevel ? generator.current.target: 'null'},
root: component.root || component
});
` );
}
if ( isToplevel ) {
local.mount.unshift( `${name}.mount( target, anchor );` );
}
if ( local.dynamicAttributes.length ) {
const updates = local.dynamicAttributes.map( attribute => {
return deindent`
if ( ${attribute.dependencies.map( dependency => `'${dependency}' in changed` ).join( '||' )} ) ${name}_changes.${attribute.name} = ${attribute.value};
`;
});
local.update.push( deindent`
var ${name}_changes = {};
${updates.join( '\n' )}
if ( Object.keys( ${name}_changes ).length ) ${name}.set( ${name}_changes );
` );
}
local.teardown.push( `${name}.teardown( ${isToplevel ? 'detach' : 'false'} );` );
generator.current.initStatements.push( local.init.join( '\n' ) );
if ( local.update.length ) generator.current.updateStatements.push( local.update.join( '\n' ) );
if ( local.mount.length ) generator.current.mountStatements.push( local.mount.join( '\n' ) );
generator.current.teardownStatements.push( local.teardown.join( '\n' ) );
generator.push({
namespace: local.namespace,
target: name,
parent: generator.current,
elementDepth: generator.current.elementDepth + 1,
localElementDepth: generator.current.localElementDepth + 1
});
},
leave ( generator ) {
generator.pop();
}
};

162
compiler/generate/visitors/Element.js
Unescape View File

@ -1,16 +1,20 @@
import deindent from '../utils/deindent.js'; import deindent from '../utils/deindent.js';
import addComponentAttributes from './attributes/addComponentAttributes.js';
import addElementAttributes from './attributes/addElementAttributes.js'; import addElementAttributes from './attributes/addElementAttributes.js';
import Component from './Component.js';
export default { export default {
enter ( generator, node ) { enter ( generator, node ) {
const isComponent = node.name in generator.components; const isComponent = node.name in generator.components;
const name = generator.current.counter( isComponent ? `${node.name[0].toLowerCase()}${node.name.slice( 1 )}` : node.name ); if ( isComponent ) {
return Component.enter( generator, node );
}
const name = generator.current.counter( node.name );
const local = { const local = {
name, name,
namespace: name === 'svg' ? 'http://www.w3.org/2000/svg' : generator.current.namespace, namespace: name === 'svg' ? 'http://www.w3.org/2000/svg' : generator.current.namespace,
isComponent, isComponent: false,
allUsedContexts: new Set(), allUsedContexts: new Set(),
@ -22,124 +26,49 @@ export default {
const isToplevel = generator.current.localElementDepth === 0; const isToplevel = generator.current.localElementDepth === 0;
if ( isComponent ) { addElementAttributes( generator, node, local );
generator.hasComponents = true;
addComponentAttributes( generator, node, local );
if ( local.staticAttributes.length || local.dynamicAttributes.length || local.bindings.length ) {
const initialProps = local.staticAttributes
.concat( local.dynamicAttributes )
.map( attribute => `${attribute.name}: ${attribute.value}` );
const statements = [];
if ( initialProps.length ) {
statements.push( deindent`
var ${name}_initialData = {
${initialProps.join( ',\n' )}
};
` );
} else {
statements.push( `var ${name}_initialData = {};` );
}
if ( local.bindings.length ) {
const bindings = local.bindings.map( binding => {
const parts = binding.value.split( '.' );
const tail = parts.pop();
return `if ( '${tail}' in ${parts.join( '.' )} ) ${name}_initialData.${binding.name} = ${binding.value};`;
});
statements.push( bindings.join( '\n' ) );
}
local.init.unshift( deindent`
${statements.join( '\n\n' )}
var ${name} = new template.components.${node.name}({
target: ${!isToplevel ? generator.current.target: 'null'},
root: component.root || component,
data: ${name}_initialData
});
` );
} else {
local.init.unshift( deindent`
var ${name} = new template.components.${node.name}({
target: ${!isToplevel ? generator.current.target: 'null'},
root: component.root || component
});
` );
}
if ( isToplevel ) {
local.mount.unshift( `${name}.mount( target, anchor );` );
}
if ( local.dynamicAttributes.length ) {
const updates = local.dynamicAttributes.map( attribute => {
return deindent`
if ( ${attribute.dependencies.map( dependency => `'${dependency}' in changed` ).join( '||' )} ) ${name}_changes.${attribute.name} = ${attribute.value};
`;
});
local.update.push( deindent`
var ${name}_changes = {};
${updates.join( '\n' )}
if ( Object.keys( ${name}_changes ).length ) ${name}.set( ${name}_changes );
` );
}
local.teardown.push( `${name}.teardown( ${isToplevel ? 'detach' : 'false'} );` );
}
else {
addElementAttributes( generator, node, local );
if ( local.allUsedContexts.size ) { if ( local.allUsedContexts.size ) {
const contextNames = [...local.allUsedContexts]; const contextNames = [...local.allUsedContexts];
const initialProps = contextNames.map( contextName => { const initialProps = contextNames.map( contextName => {
if ( contextName === 'root' ) return `root: root`; if ( contextName === 'root' ) return `root: root`;
const listName = generator.current.listNames[ contextName ]; const listName = generator.current.listNames[ contextName ];
const indexName = generator.current.indexNames[ contextName ]; const indexName = generator.current.indexNames[ contextName ];
return `${listName}: ${listName},\n${indexName}: ${indexName}`; return `${listName}: ${listName},\n${indexName}: ${indexName}`;
}).join( ',\n' ); }).join( ',\n' );
const updates = contextNames.map( contextName => { const updates = contextNames.map( contextName => {
if ( contextName === 'root' ) return `${name}.__svelte.root = root;`; if ( contextName === 'root' ) return `${name}.__svelte.root = root;`;
const listName = generator.current.listNames[ contextName ]; const listName = generator.current.listNames[ contextName ];
const indexName = generator.current.indexNames[ contextName ]; const indexName = generator.current.indexNames[ contextName ];
return `${name}.__svelte.${listName} = ${listName};\n${name}.__svelte.${indexName} = ${indexName};`; return `${name}.__svelte.${listName} = ${listName};\n${name}.__svelte.${indexName} = ${indexName};`;
}).join( '\n' ); }).join( '\n' );
local.init.push( deindent` local.init.push( deindent`
${name}.__svelte = { ${name}.__svelte = {
${initialProps} ${initialProps}
}; };
` ); ` );
local.update.push( updates ); local.update.push( updates );
} }
let render = local.namespace ? let render = local.namespace ?
`var ${name} = document.createElementNS( '${local.namespace}', '${node.name}' );` : `var ${name} = document.createElementNS( '${local.namespace}', '${node.name}' );` :
`var ${name} = document.createElement( '${node.name}' );`; `var ${name} = document.createElement( '${node.name}' );`;
if ( generator.cssId && !generator.current.elementDepth ) { if ( generator.cssId && !generator.current.elementDepth ) {
render += `\n${name}.setAttribute( '${generator.cssId}', '' );`; render += `\n${name}.setAttribute( '${generator.cssId}', '' );`;
} }
local.init.unshift( render ); local.init.unshift( render );
if ( isToplevel ) { if ( isToplevel ) {
local.teardown.push( `if ( detach ) ${name}.parentNode.removeChild( ${name} );` ); local.teardown.push( `if ( detach ) ${name}.parentNode.removeChild( ${name} );` );
}
} }
// special case – bound <option> without a value attribute // special case – bound <option> without a value attribute
@ -154,8 +83,9 @@ export default {
if ( local.mount.length ) generator.current.mountStatements.push( local.mount.join( '\n' ) ); if ( local.mount.length ) generator.current.mountStatements.push( local.mount.join( '\n' ) );
generator.current.teardownStatements.push( local.teardown.join( '\n' ) ); generator.current.teardownStatements.push( local.teardown.join( '\n' ) );
generator.createMountStatement( name );
generator.push({ generator.push({
isComponent,
namespace: local.namespace, namespace: local.namespace,
target: name, target: name,
parent: generator.current, parent: generator.current,
@ -164,14 +94,12 @@ export default {
}); });
}, },
leave ( generator ) { leave ( generator, node ) {
const name = generator.current.target; const isComponent = node.name in generator.components;
const isComponent = generator.current.isComponent; if ( isComponent ) {
return Component.leave( generator, node );
}
generator.pop(); generator.pop();
if ( isComponent ) return;
generator.createMountStatement( name );
} }
}; };

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