mirror of https://github.com/sveltejs/svelte
combine multiple bindings in single handler, implement bind:indeterminate — fixes #910
Rich Harris
8 years ago
committed by
GitHub
parent
509fb1a6e3
commit
775866780e
@ -1,349 +0,0 @@
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import deindent from '../../../../utils/deindent';
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import flattenReference from '../../../../utils/flattenReference';
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import getStaticAttributeValue from '../../../../utils/getStaticAttributeValue';
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import { DomGenerator } from '../../index';
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import Block from '../../Block';
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import { Node } from '../../../../interfaces';
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import { State } from '../../interfaces';
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import getObject from '../../../../utils/getObject';
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import getTailSnippet from '../../../../utils/getTailSnippet';
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const readOnlyMediaAttributes = new Set([
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'duration',
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'buffered',
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'seekable',
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'played'
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]);
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export default function visitBinding(
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generator: DomGenerator,
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block: Block,
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state: State,
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node: Node,
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attribute: Node
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) {
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const { name } = getObject(attribute.value);
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const { snippet, contexts, dependencies } = block.contextualise(
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attribute.value
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);
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contexts.forEach(context => {
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if (!~state.allUsedContexts.indexOf(context))
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state.allUsedContexts.push(context);
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});
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const eventNames = getBindingEventName(node, attribute);
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const handler = block.getUniqueName(
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`${state.parentNode}_${eventNames.join('_')}_handler`
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);
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const isMultipleSelect =
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node.name === 'select' &&
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node.attributes.find(
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(attr: Node) => attr.name.toLowerCase() === 'multiple'
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); // TODO use getStaticAttributeValue
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const type = getStaticAttributeValue(node, 'type');
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const bindingGroup = attribute.name === 'group'
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? getBindingGroup(generator, attribute.value)
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: null;
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const isMediaElement = node.name === 'audio' || node.name === 'video';
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const isReadOnly = isMediaElement && readOnlyMediaAttributes.has(attribute.name)
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const value = getBindingValue(
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generator,
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block,
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state,
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node,
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attribute,
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isMultipleSelect,
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isMediaElement,
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bindingGroup,
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type
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);
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let setter = getSetter(generator, block, name, snippet, state.parentNode, attribute, dependencies, value);
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let updateElement = `${state.parentNode}.${attribute.name} = ${snippet};`;
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const needsLock = !isReadOnly && node.name !== 'input' || !/radio|checkbox|range|color/.test(type); // TODO others?
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const lock = `#${state.parentNode}_updating`;
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let updateConditions = needsLock ? [`!${lock}`] : [];
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if (needsLock) block.addVariable(lock, 'false');
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// <select> special case
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if (node.name === 'select') {
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if (!isMultipleSelect) {
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setter = `var selectedOption = ${state.parentNode}.querySelector(':checked') || ${state.parentNode}.options[0];\n${setter}`;
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}
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const value = block.getUniqueName('value');
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const option = block.getUniqueName('option');
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const ifStatement = isMultipleSelect
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? deindent`
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${option}.selected = ~${value}.indexOf(${option}.__value);`
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: deindent`
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if (${option}.__value === ${value}) {
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${option}.selected = true;
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break;
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}`;
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const { name } = getObject(attribute.value);
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const tailSnippet = getTailSnippet(attribute.value);
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updateElement = deindent`
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var ${value} = ${snippet};
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for (var #i = 0; #i < ${state.parentNode}.options.length; #i += 1) {
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var ${option} = ${state.parentNode}.options[#i];
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${ifStatement}
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}
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`;
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generator.hasComplexBindings = true;
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block.builders.hydrate.addBlock(
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`if (!('${name}' in state)) #component._root._beforecreate.push(${handler});`
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);
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} else if (attribute.name === 'group') {
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// <input type='checkbox|radio' bind:group='selected'> special case
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if (type === 'radio') {
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setter = deindent`
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if (!${state.parentNode}.checked) return;
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${setter}
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`;
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}
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const condition = type === 'checkbox'
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? `~${snippet}.indexOf(${state.parentNode}.__value)`
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: `${state.parentNode}.__value === ${snippet}`;
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block.builders.hydrate.addLine(
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`#component._bindingGroups[${bindingGroup}].push(${state.parentNode});`
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);
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block.builders.destroy.addBlock(
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`#component._bindingGroups[${bindingGroup}].splice(#component._bindingGroups[${bindingGroup}].indexOf(${state.parentNode}), 1);`
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);
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updateElement = `${state.parentNode}.checked = ${condition};`;
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} else if (isMediaElement) {
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generator.hasComplexBindings = true;
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block.builders.hydrate.addBlock(`#component._root._beforecreate.push(${handler});`);
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if (attribute.name === 'currentTime') {
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const frame = block.getUniqueName(`${state.parentNode}_animationframe`);
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block.addVariable(frame);
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setter = deindent`
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cancelAnimationFrame(${frame});
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if (!${state.parentNode}.paused) ${frame} = requestAnimationFrame(${handler});
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${setter}
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`;
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updateConditions.push(`!isNaN(${snippet})`);
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} else if (attribute.name === 'paused') {
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// this is necessary to prevent the audio restarting by itself
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const last = block.getUniqueName(`${state.parentNode}_paused_value`);
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block.addVariable(last, 'true');
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updateConditions = [`${last} !== (${last} = ${snippet})`];
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updateElement = `${state.parentNode}[${last} ? "pause" : "play"]();`;
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}
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}
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block.builders.init.addBlock(deindent`
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function ${handler}() {
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${needsLock && `${lock} = true;`}
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${setter}
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${needsLock && `${lock} = false;`}
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}
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`);
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if (node.name === 'input' && type === 'range') {
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// need to bind to `input` and `change`, for the benefit of IE
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block.builders.hydrate.addBlock(deindent`
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@addListener(${state.parentNode}, "input", ${handler});
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@addListener(${state.parentNode}, "change", ${handler});
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`);
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block.builders.destroy.addBlock(deindent`
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@removeListener(${state.parentNode}, "input", ${handler});
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@removeListener(${state.parentNode}, "change", ${handler});
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`);
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} else {
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eventNames.forEach(eventName => {
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block.builders.hydrate.addLine(
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`@addListener(${state.parentNode}, "${eventName}", ${handler});`
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);
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block.builders.destroy.addLine(
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`@removeListener(${state.parentNode}, "${eventName}", ${handler});`
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);
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});
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}
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if (!isMediaElement) {
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node.initialUpdate = updateElement;
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node.initialUpdateNeedsStateObject = !block.contexts.has(name);
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}
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if (!isReadOnly) { // audio/video duration is read-only, it never updates
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if (updateConditions.length) {
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block.builders.update.addBlock(deindent`
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if (${updateConditions.join(' && ')}) {
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${updateElement}
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}
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`);
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} else {
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block.builders.update.addBlock(deindent`
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${updateElement}
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`);
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}
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}
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if (attribute.name === 'paused') {
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block.builders.create.addLine(
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`@addListener(${state.parentNode}, "play", ${handler});`
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);
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block.builders.destroy.addLine(
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`@removeListener(${state.parentNode}, "play", ${handler});`
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);
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}
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}
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function getBindingEventName(node: Node, attribute: Node) {
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if (node.name === 'input') {
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const typeAttribute = node.attributes.find(
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(attr: Node) => attr.type === 'Attribute' && attr.name === 'type'
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);
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const type = typeAttribute ? typeAttribute.value[0].data : 'text'; // TODO in validation, should throw if type attribute is not static
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return [type === 'checkbox' || type === 'radio' ? 'change' : 'input'];
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}
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if (node.name === 'textarea') return ['input'];
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if (attribute.name === 'currentTime') return ['timeupdate'];
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if (attribute.name === 'duration') return ['durationchange'];
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if (attribute.name === 'paused') return ['pause'];
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if (attribute.name === 'buffered') return ['progress', 'loadedmetadata'];
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if (attribute.name === 'seekable') return ['loadedmetadata'];
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if (attribute.name === 'played') return ['timeupdate'];
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return ['change'];
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}
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function getBindingValue(
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generator: DomGenerator,
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block: Block,
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state: State,
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node: Node,
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attribute: Node,
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isMultipleSelect: boolean,
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isMediaElement: boolean,
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bindingGroup: number,
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type: string
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) {
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// <select multiple bind:value='selected>
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if (isMultipleSelect) {
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return `[].map.call(${state.parentNode}.querySelectorAll(':checked'), function(option) { return option.__value; })`;
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}
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// <select bind:value='selected>
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if (node.name === 'select') {
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return 'selectedOption && selectedOption.__value';
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}
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// <input type='checkbox' bind:group='foo'>
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if (attribute.name === 'group') {
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if (type === 'checkbox') {
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return `@getBindingGroupValue(#component._bindingGroups[${bindingGroup}])`;
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}
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return `${state.parentNode}.__value`;
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}
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// <input type='range|number' bind:value>
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if (type === 'range' || type === 'number') {
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return `@toNumber(${state.parentNode}.${attribute.name})`;
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}
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if (isMediaElement && (attribute.name === 'buffered' || attribute.name === 'seekable' || attribute.name === 'played')) {
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return `@timeRangesToArray(${state.parentNode}.${attribute.name})`
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}
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// everything else
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return `${state.parentNode}.${attribute.name}`;
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}
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function getBindingGroup(generator: DomGenerator, value: Node) {
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const { parts } = flattenReference(value); // TODO handle cases involving computed member expressions
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const keypath = parts.join('.');
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// TODO handle contextual bindings — `keypath` should include unique ID of
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// each block that provides context
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let index = generator.bindingGroups.indexOf(keypath);
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if (index === -1) {
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index = generator.bindingGroups.length;
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generator.bindingGroups.push(keypath);
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}
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return index;
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}
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function getSetter(
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generator: DomGenerator,
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block: Block,
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name: string,
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snippet: string,
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_this: string,
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attribute: Node,
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dependencies: string[],
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value: string,
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) {
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const tail = attribute.value.type === 'MemberExpression'
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? getTailSnippet(attribute.value)
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: '';
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if (block.contexts.has(name)) {
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const prop = dependencies[0];
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const computed = isComputed(attribute.value);
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return deindent`
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var list = ${_this}._svelte.${block.listNames.get(name)};
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var index = ${_this}._svelte.${block.indexNames.get(name)};
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${computed && `var state = #component.get();`}
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list[index]${tail} = ${value};
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${computed
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? `#component.set({${dependencies.map((prop: string) => `${prop}: state.${prop}`).join(', ')} });`
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: `#component.set({${dependencies.map((prop: string) => `${prop}: #component.get('${prop}')`).join(', ')} });`}
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`;
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}
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if (attribute.value.type === 'MemberExpression') {
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// This is a little confusing, and should probably be tidied up
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// at some point. It addresses a tricky bug (#893), wherein
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// Svelte tries to `set()` a computed property, which throws an
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// error in dev mode. a) it's possible that we should be
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// replacing computations with *their* dependencies, and b)
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// we should probably populate `generator.readonly` sooner so
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// that we don't have to do the `.some()` here
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dependencies = dependencies.filter(prop => !generator.computations.some(computation => computation.key === prop));
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return deindent`
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var state = #component.get();
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${snippet} = ${value};
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#component.set({ ${dependencies.map((prop: string) => `${prop}: state.${prop}`).join(', ')} });
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`;
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}
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return `#component.set({ ${name}: ${value} });`;
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}
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function isComputed(node: Node) {
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while (node.type === 'MemberExpression') {
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if (node.computed) return true;
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node = node.object;
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}
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return false;
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}
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@ -1,111 +0,0 @@
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import deindent from '../../../../utils/deindent';
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import flattenReference from '../../../../utils/flattenReference';
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import validCalleeObjects from '../../../../utils/validCalleeObjects';
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import { DomGenerator } from '../../index';
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import Block from '../../Block';
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import { Node } from '../../../../interfaces';
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import { State } from '../../interfaces';
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export default function visitEventHandler(
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generator: DomGenerator,
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block: Block,
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state: State,
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node: Node,
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attribute: Node
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) {
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const name = attribute.name;
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const isCustomEvent = generator.events.has(name);
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const shouldHoist = !isCustomEvent && state.inEachBlock;
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const context = shouldHoist ? null : state.parentNode;
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const usedContexts: string[] = [];
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if (attribute.expression) {
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generator.addSourcemapLocations(attribute.expression);
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const flattened = flattenReference(attribute.expression.callee);
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if (!validCalleeObjects.has(flattened.name)) {
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// allow event.stopPropagation(), this.select() etc
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// TODO verify that it's a valid callee (i.e. built-in or declared method)
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generator.code.prependRight(
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attribute.expression.start,
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`${block.alias('component')}.`
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);
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if (shouldHoist) state.usesComponent = true; // this feels a bit hacky but it works!
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}
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|
||||||
attribute.expression.arguments.forEach((arg: Node) => {
|
|
||||||
const { contexts } = block.contextualise(arg, context, true);
|
|
||||||
|
|
||||||
contexts.forEach(context => {
|
|
||||||
if (!~usedContexts.indexOf(context)) usedContexts.push(context);
|
|
||||||
if (!~state.allUsedContexts.indexOf(context))
|
|
||||||
state.allUsedContexts.push(context);
|
|
||||||
});
|
|
||||||
});
|
|
||||||
}
|
|
||||||
|
|
||||||
const _this = context || 'this';
|
|
||||||
const declarations = usedContexts.map(name => {
|
|
||||||
if (name === 'state') {
|
|
||||||
if (shouldHoist) state.usesComponent = true;
|
|
||||||
return `var state = ${block.alias('component')}.get();`;
|
|
||||||
}
|
|
||||||
|
|
||||||
const listName = block.listNames.get(name);
|
|
||||||
const indexName = block.indexNames.get(name);
|
|
||||||
const contextName = block.contexts.get(name);
|
|
||||||
|
|
||||||
return `var ${listName} = ${_this}._svelte.${listName}, ${indexName} = ${_this}._svelte.${indexName}, ${contextName} = ${listName}[${indexName}];`;
|
|
||||||
});
|
|
||||||
|
|
||||||
// get a name for the event handler that is globally unique
|
|
||||||
// if hoisted, locally unique otherwise
|
|
||||||
const handlerName = (shouldHoist ? generator : block).getUniqueName(
|
|
||||||
`${name.replace(/[^a-zA-Z0-9_$]/g, '_')}_handler`
|
|
||||||
);
|
|
||||||
|
|
||||||
// create the handler body
|
|
||||||
const handlerBody = deindent`
|
|
||||||
${state.usesComponent &&
|
|
||||||
`var ${block.alias('component')} = ${_this}._svelte.component;`}
|
|
||||||
${declarations}
|
|
||||||
${attribute.expression ?
|
|
||||||
`[✂${attribute.expression.start}-${attribute.expression.end}✂];` :
|
|
||||||
`${block.alias('component')}.fire("${attribute.name}", event);`}
|
|
||||||
`;
|
|
||||||
|
|
||||||
if (isCustomEvent) {
|
|
||||||
block.addVariable(handlerName);
|
|
||||||
|
|
||||||
block.builders.hydrate.addBlock(deindent`
|
|
||||||
${handlerName} = %events-${name}.call(#component, ${state.parentNode}, function(event) {
|
|
||||||
${handlerBody}
|
|
||||||
});
|
|
||||||
`);
|
|
||||||
|
|
||||||
block.builders.destroy.addLine(deindent`
|
|
||||||
${handlerName}.teardown();
|
|
||||||
`);
|
|
||||||
} else {
|
|
||||||
const handler = deindent`
|
|
||||||
function ${handlerName}(event) {
|
|
||||||
${handlerBody}
|
|
||||||
}
|
|
||||||
`;
|
|
||||||
|
|
||||||
if (shouldHoist) {
|
|
||||||
generator.blocks.push(handler);
|
|
||||||
} else {
|
|
||||||
block.builders.init.addBlock(handler);
|
|
||||||
}
|
|
||||||
|
|
||||||
block.builders.hydrate.addLine(
|
|
||||||
`@addListener(${state.parentNode}, "${name}", ${handlerName});`
|
|
||||||
);
|
|
||||||
|
|
||||||
block.builders.destroy.addLine(
|
|
||||||
`@removeListener(${state.parentNode}, "${name}", ${handlerName});`
|
|
||||||
);
|
|
||||||
}
|
|
||||||
}
|
|
||||||
@ -1,25 +0,0 @@
|
|||||||
import deindent from '../../../../utils/deindent';
|
|
||||||
import { DomGenerator } from '../../index';
|
|
||||||
import Block from '../../Block';
|
|
||||||
import { Node } from '../../../../interfaces';
|
|
||||||
import { State } from '../../interfaces';
|
|
||||||
|
|
||||||
export default function visitRef(
|
|
||||||
generator: DomGenerator,
|
|
||||||
block: Block,
|
|
||||||
state: State,
|
|
||||||
node: Node,
|
|
||||||
attribute: Node
|
|
||||||
) {
|
|
||||||
const name = attribute.name;
|
|
||||||
|
|
||||||
block.builders.mount.addLine(
|
|
||||||
`#component.refs.${name} = ${state.parentNode};`
|
|
||||||
);
|
|
||||||
|
|
||||||
block.builders.destroy.addLine(deindent`
|
|
||||||
if (#component.refs.${name} === ${state.parentNode}) #component.refs.${name} = null;
|
|
||||||
`);
|
|
||||||
|
|
||||||
generator.usesRefs = true; // so this component.refs object is created
|
|
||||||
}
|
|
||||||
@ -0,0 +1,382 @@
|
|||||||
|
import deindent from '../../../../utils/deindent';
|
||||||
|
import flattenReference from '../../../../utils/flattenReference';
|
||||||
|
import getStaticAttributeValue from '../../../../utils/getStaticAttributeValue';
|
||||||
|
import { DomGenerator } from '../../index';
|
||||||
|
import Block from '../../Block';
|
||||||
|
import { Node } from '../../../../interfaces';
|
||||||
|
import { State } from '../../interfaces';
|
||||||
|
import getObject from '../../../../utils/getObject';
|
||||||
|
import getTailSnippet from '../../../../utils/getTailSnippet';
|
||||||
|
import stringifyProps from '../../../../utils/stringifyProps';
|
||||||
|
import { generateRule } from '../../../../shared/index';
|
||||||
|
import flatten from '../../../../utils/flattenReference';
|
||||||
|
|
||||||
|
interface Binding {
|
||||||
|
name: string;
|
||||||
|
}
|
||||||
|
|
||||||
|
const readOnlyMediaAttributes = new Set([
|
||||||
|
'duration',
|
||||||
|
'buffered',
|
||||||
|
'seekable',
|
||||||
|
'played'
|
||||||
|
]);
|
||||||
|
|
||||||
|
function isMediaNode(name: string) {
|
||||||
|
return name === 'audio' || name === 'video';
|
||||||
|
}
|
||||||
|
|
||||||
|
const events = [
|
||||||
|
{
|
||||||
|
eventNames: ['input'],
|
||||||
|
filter: (node: Node, binding: Binding) =>
|
||||||
|
node.name === 'textarea' ||
|
||||||
|
node.name === 'input' && !/radio|checkbox/.test(getStaticAttributeValue(node, 'type'))
|
||||||
|
},
|
||||||
|
{
|
||||||
|
eventNames: ['change'],
|
||||||
|
filter: (node: Node, binding: Binding) =>
|
||||||
|
node.name === 'select' ||
|
||||||
|
node.name === 'input' && /radio|checkbox|range/.test(getStaticAttributeValue(node, 'type'))
|
||||||
|
},
|
||||||
|
|
||||||
|
// media events
|
||||||
|
{
|
||||||
|
eventNames: ['timeupdate'],
|
||||||
|
filter: (node: Node, binding: Binding) =>
|
||||||
|
isMediaNode(node.name) &&
|
||||||
|
(binding.name === 'currentTime' || binding.name === 'played')
|
||||||
|
},
|
||||||
|
{
|
||||||
|
eventNames: ['durationchange'],
|
||||||
|
filter: (node: Node, binding: Binding) =>
|
||||||
|
isMediaNode(node.name) &&
|
||||||
|
binding.name === 'duration'
|
||||||
|
},
|
||||||
|
{
|
||||||
|
eventNames: ['play', 'pause'],
|
||||||
|
filter: (node: Node, binding: Binding) =>
|
||||||
|
isMediaNode(node.name) &&
|
||||||
|
binding.name === 'paused'
|
||||||
|
},
|
||||||
|
{
|
||||||
|
eventNames: ['progress'],
|
||||||
|
filter: (node: Node, binding: Binding) =>
|
||||||
|
isMediaNode(node.name) &&
|
||||||
|
binding.name === 'buffered'
|
||||||
|
},
|
||||||
|
{
|
||||||
|
eventNames: ['loadedmetadata'],
|
||||||
|
filter: (node: Node, binding: Binding) =>
|
||||||
|
isMediaNode(node.name) &&
|
||||||
|
(binding.name === 'buffered' || binding.name === 'seekable')
|
||||||
|
}
|
||||||
|
];
|
||||||
|
|
||||||
|
export default function addBindings(
|
||||||
|
generator: DomGenerator,
|
||||||
|
block: Block,
|
||||||
|
state: State,
|
||||||
|
node: Node
|
||||||
|
) {
|
||||||
|
const bindings: Node[] = node.attributes.filter((a: Node) => a.type === 'Binding');
|
||||||
|
if (bindings.length === 0) return;
|
||||||
|
|
||||||
|
if (node.name === 'select' || isMediaNode(node.name)) generator.hasComplexBindings = true;
|
||||||
|
|
||||||
|
const needsLock = node.name !== 'input' || !/radio|checkbox|range|color/.test(getStaticAttributeValue(node, 'type'));
|
||||||
|
|
||||||
|
const mungedBindings = bindings.map(binding => {
|
||||||
|
const isReadOnly = isMediaNode(node.name) && readOnlyMediaAttributes.has(binding.name);
|
||||||
|
|
||||||
|
let updateCondition: string;
|
||||||
|
|
||||||
|
const { name } = getObject(binding.value);
|
||||||
|
const { snippet, contexts, dependencies } = block.contextualise(
|
||||||
|
binding.value
|
||||||
|
);
|
||||||
|
|
||||||
|
contexts.forEach(context => {
|
||||||
|
if (!~state.allUsedContexts.indexOf(context))
|
||||||
|
state.allUsedContexts.push(context);
|
||||||
|
});
|
||||||
|
|
||||||
|
// view to model
|
||||||
|
const valueFromDom = getValueFromDom(generator, node, binding);
|
||||||
|
const handler = getEventHandler(generator, block, name, snippet, binding, dependencies, valueFromDom);
|
||||||
|
|
||||||
|
// model to view
|
||||||
|
let updateDom = getDomUpdater(node, binding, snippet);
|
||||||
|
let initialUpdate = updateDom;
|
||||||
|
|
||||||
|
// special cases
|
||||||
|
if (binding.name === 'group') {
|
||||||
|
const bindingGroup = getBindingGroup(generator, binding.value);
|
||||||
|
|
||||||
|
block.builders.hydrate.addLine(
|
||||||
|
`#component._bindingGroups[${bindingGroup}].push(${node.var});`
|
||||||
|
);
|
||||||
|
|
||||||
|
block.builders.destroy.addLine(
|
||||||
|
`#component._bindingGroups[${bindingGroup}].splice(#component._bindingGroups[${bindingGroup}].indexOf(${node.var}), 1);`
|
||||||
|
);
|
||||||
|
}
|
||||||
|
|
||||||
|
if (binding.name === 'currentTime') {
|
||||||
|
updateCondition = `!isNaN(${snippet})`;
|
||||||
|
initialUpdate = null;
|
||||||
|
}
|
||||||
|
|
||||||
|
if (binding.name === 'paused') {
|
||||||
|
// this is necessary to prevent audio restarting by itself
|
||||||
|
const last = block.getUniqueName(`${node.var}_is_paused`);
|
||||||
|
block.addVariable(last, 'true');
|
||||||
|
|
||||||
|
updateCondition = `${last} !== (${last} = ${snippet})`;
|
||||||
|
updateDom = `${node.var}[${last} ? "pause" : "play"]();`;
|
||||||
|
initialUpdate = null;
|
||||||
|
}
|
||||||
|
|
||||||
|
return {
|
||||||
|
name: binding.name,
|
||||||
|
object: name,
|
||||||
|
handler,
|
||||||
|
updateDom,
|
||||||
|
initialUpdate,
|
||||||
|
needsLock: !isReadOnly && needsLock,
|
||||||
|
updateCondition
|
||||||
|
};
|
||||||
|
});
|
||||||
|
|
||||||
|
const lock = mungedBindings.some(binding => binding.needsLock) ?
|
||||||
|
block.getUniqueName(`${node.var}_updating`) :
|
||||||
|
null;
|
||||||
|
|
||||||
|
if (lock) block.addVariable(lock, 'false');
|
||||||
|
|
||||||
|
const groups = events
|
||||||
|
.map(event => {
|
||||||
|
return {
|
||||||
|
events: event.eventNames,
|
||||||
|
bindings: mungedBindings.filter(binding => event.filter(node, binding))
|
||||||
|
};
|
||||||
|
})
|
||||||
|
.filter(group => group.bindings.length);
|
||||||
|
|
||||||
|
groups.forEach(group => {
|
||||||
|
const handler = block.getUniqueName(`${node.var}_${group.events.join('_')}_handler`);
|
||||||
|
|
||||||
|
const needsLock = group.bindings.some(binding => binding.needsLock);
|
||||||
|
|
||||||
|
group.bindings.forEach(binding => {
|
||||||
|
if (!binding.updateDom) return;
|
||||||
|
|
||||||
|
const updateConditions = needsLock ? [`!${lock}`] : [];
|
||||||
|
if (binding.updateCondition) updateConditions.push(binding.updateCondition);
|
||||||
|
|
||||||
|
block.builders.update.addLine(
|
||||||
|
updateConditions.length ? `if (${updateConditions.join(' && ')}) ${binding.updateDom}` : binding.updateDom
|
||||||
|
);
|
||||||
|
});
|
||||||
|
|
||||||
|
const usesContext = group.bindings.some(binding => binding.handler.usesContext);
|
||||||
|
const usesState = group.bindings.some(binding => binding.handler.usesState);
|
||||||
|
const mutations = group.bindings.map(binding => binding.handler.mutation).filter(Boolean).join('\n');
|
||||||
|
|
||||||
|
const props = new Set();
|
||||||
|
group.bindings.forEach(binding => {
|
||||||
|
binding.handler.props.forEach(prop => {
|
||||||
|
props.add(prop);
|
||||||
|
});
|
||||||
|
}); // TODO use stringifyProps here, once indenting is fixed
|
||||||
|
|
||||||
|
// media bindings — awkward special case. The native timeupdate events
|
||||||
|
// fire too infrequently, so we need to take matters into our
|
||||||
|
// own hands
|
||||||
|
let animation_frame;
|
||||||
|
if (group.events[0] === 'timeupdate') {
|
||||||
|
animation_frame = block.getUniqueName(`${node.var}_animationframe`);
|
||||||
|
block.addVariable(animation_frame);
|
||||||
|
}
|
||||||
|
|
||||||
|
block.builders.init.addBlock(deindent`
|
||||||
|
function ${handler}() {
|
||||||
|
${
|
||||||
|
animation_frame && deindent`
|
||||||
|
cancelAnimationFrame(${animation_frame});
|
||||||
|
if (!${node.var}.paused) ${animation_frame} = requestAnimationFrame(${handler});`
|
||||||
|
}
|
||||||
|
${usesContext && `var context = ${node.var}._svelte;`}
|
||||||
|
${usesState && `var state = #component.get();`}
|
||||||
|
${needsLock && `${lock} = true;`}
|
||||||
|
${mutations.length > 0 && mutations}
|
||||||
|
#component.set({ ${Array.from(props).join(', ')} });
|
||||||
|
${needsLock && `${lock} = false;`}
|
||||||
|
}
|
||||||
|
`);
|
||||||
|
|
||||||
|
group.events.forEach(name => {
|
||||||
|
block.builders.hydrate.addLine(
|
||||||
|
`@addListener(${node.var}, "${name}", ${handler});`
|
||||||
|
);
|
||||||
|
|
||||||
|
block.builders.destroy.addLine(
|
||||||
|
`@removeListener(${node.var}, "${name}", ${handler});`
|
||||||
|
);
|
||||||
|
});
|
||||||
|
|
||||||
|
const allInitialStateIsDefined = group.bindings
|
||||||
|
.map(binding => `'${binding.object}' in state`)
|
||||||
|
.join(' && ');
|
||||||
|
|
||||||
|
if (node.name === 'select' || group.bindings.find(binding => binding.name === 'indeterminate' || readOnlyMediaAttributes.has(binding.name))) {
|
||||||
|
generator.hasComplexBindings = true;
|
||||||
|
|
||||||
|
block.builders.hydrate.addLine(
|
||||||
|
`if (!(${allInitialStateIsDefined})) #component._root._beforecreate.push(${handler});`
|
||||||
|
);
|
||||||
|
}
|
||||||
|
});
|
||||||
|
|
||||||
|
node.initialUpdate = mungedBindings.map(binding => binding.initialUpdate).filter(Boolean).join('\n');
|
||||||
|
}
|
||||||
|
|
||||||
|
function getDomUpdater(
|
||||||
|
node: Node,
|
||||||
|
binding: Node,
|
||||||
|
snippet: string
|
||||||
|
) {
|
||||||
|
if (readOnlyMediaAttributes.has(binding.name)) {
|
||||||
|
return null;
|
||||||
|
}
|
||||||
|
|
||||||
|
if (node.name === 'select') {
|
||||||
|
return getStaticAttributeValue(node, 'multiple') === true ?
|
||||||
|
`@selectOptions(${node.var}, ${snippet})` :
|
||||||
|
`@selectOption(${node.var}, ${snippet})`;
|
||||||
|
}
|
||||||
|
|
||||||
|
if (binding.name === 'group') {
|
||||||
|
const type = getStaticAttributeValue(node, 'type');
|
||||||
|
|
||||||
|
const condition = type === 'checkbox'
|
||||||
|
? `~${snippet}.indexOf(${node.var}.__value)`
|
||||||
|
: `${node.var}.__value === ${snippet}`;
|
||||||
|
|
||||||
|
return `${node.var}.checked = ${condition};`
|
||||||
|
}
|
||||||
|
|
||||||
|
return `${node.var}.${binding.name} = ${snippet};`;
|
||||||
|
}
|
||||||
|
|
||||||
|
function getBindingGroup(generator: DomGenerator, value: Node) {
|
||||||
|
const { parts } = flattenReference(value); // TODO handle cases involving computed member expressions
|
||||||
|
const keypath = parts.join('.');
|
||||||
|
|
||||||
|
// TODO handle contextual bindings — `keypath` should include unique ID of
|
||||||
|
// each block that provides context
|
||||||
|
let index = generator.bindingGroups.indexOf(keypath);
|
||||||
|
if (index === -1) {
|
||||||
|
index = generator.bindingGroups.length;
|
||||||
|
generator.bindingGroups.push(keypath);
|
||||||
|
}
|
||||||
|
|
||||||
|
return index;
|
||||||
|
}
|
||||||
|
|
||||||
|
function getEventHandler(
|
||||||
|
generator: DomGenerator,
|
||||||
|
block: Block,
|
||||||
|
name: string,
|
||||||
|
snippet: string,
|
||||||
|
attribute: Node,
|
||||||
|
dependencies: string[],
|
||||||
|
value: string,
|
||||||
|
) {
|
||||||
|
if (block.contexts.has(name)) {
|
||||||
|
const tail = attribute.value.type === 'MemberExpression'
|
||||||
|
? getTailSnippet(attribute.value)
|
||||||
|
: '';
|
||||||
|
|
||||||
|
const list = `context.${block.listNames.get(name)}`;
|
||||||
|
const index = `context.${block.indexNames.get(name)}`;
|
||||||
|
|
||||||
|
return {
|
||||||
|
usesContext: true,
|
||||||
|
usesState: true,
|
||||||
|
mutation: `${list}[${index}]${tail} = ${value};`,
|
||||||
|
props: dependencies.map(prop => `${prop}: state.${prop}`)
|
||||||
|
};
|
||||||
|
}
|
||||||
|
|
||||||
|
if (attribute.value.type === 'MemberExpression') {
|
||||||
|
// This is a little confusing, and should probably be tidied up
|
||||||
|
// at some point. It addresses a tricky bug (#893), wherein
|
||||||
|
// Svelte tries to `set()` a computed property, which throws an
|
||||||
|
// error in dev mode. a) it's possible that we should be
|
||||||
|
// replacing computations with *their* dependencies, and b)
|
||||||
|
// we should probably populate `generator.readonly` sooner so
|
||||||
|
// that we don't have to do the `.some()` here
|
||||||
|
dependencies = dependencies.filter(prop => !generator.computations.some(computation => computation.key === prop));
|
||||||
|
|
||||||
|
return {
|
||||||
|
usesContext: false,
|
||||||
|
usesState: true,
|
||||||
|
mutation: `${snippet} = ${value}`,
|
||||||
|
props: dependencies.map((prop: string) => `${prop}: state.${prop}`)
|
||||||
|
};
|
||||||
|
}
|
||||||
|
|
||||||
|
return {
|
||||||
|
usesContext: false,
|
||||||
|
usesState: false,
|
||||||
|
mutation: null,
|
||||||
|
props: [`${name}: ${value}`]
|
||||||
|
};
|
||||||
|
}
|
||||||
|
|
||||||
|
function getValueFromDom(
|
||||||
|
generator: DomGenerator,
|
||||||
|
node: Node,
|
||||||
|
binding: Node
|
||||||
|
) {
|
||||||
|
// <select bind:value='selected>
|
||||||
|
if (node.name === 'select') {
|
||||||
|
return getStaticAttributeValue(node, 'multiple') === true ?
|
||||||
|
`@selectMultipleValue(${node.var})` :
|
||||||
|
`@selectValue(${node.var})`;
|
||||||
|
}
|
||||||
|
|
||||||
|
const type = getStaticAttributeValue(node, 'type');
|
||||||
|
|
||||||
|
// <input type='checkbox' bind:group='foo'>
|
||||||
|
if (binding.name === 'group') {
|
||||||
|
const bindingGroup = getBindingGroup(generator, binding.value);
|
||||||
|
if (type === 'checkbox') {
|
||||||
|
return `@getBindingGroupValue(#component._bindingGroups[${bindingGroup}])`;
|
||||||
|
}
|
||||||
|
|
||||||
|
return `${node.var}.__value`;
|
||||||
|
}
|
||||||
|
|
||||||
|
// <input type='range|number' bind:value>
|
||||||
|
if (type === 'range' || type === 'number') {
|
||||||
|
return `@toNumber(${node.var}.${binding.name})`;
|
||||||
|
}
|
||||||
|
|
||||||
|
if ((binding.name === 'buffered' || binding.name === 'seekable' || binding.name === 'played')) {
|
||||||
|
return `@timeRangesToArray(${node.var}.${binding.name})`
|
||||||
|
}
|
||||||
|
|
||||||
|
// everything else
|
||||||
|
return `${node.var}.${binding.name}`;
|
||||||
|
}
|
||||||
|
|
||||||
|
function isComputed(node: Node) {
|
||||||
|
while (node.type === 'MemberExpression') {
|
||||||
|
if (node.computed) return true;
|
||||||
|
node = node.object;
|
||||||
|
}
|
||||||
|
|
||||||
|
return false;
|
||||||
|
}
|
||||||
@ -0,0 +1,11 @@
|
|||||||
|
export default function stringifyProps(props: string[]) {
|
||||||
|
if (!props.length) return '{}';
|
||||||
|
|
||||||
|
const joined = props.join(', ');
|
||||||
|
if (joined.length > 40) {
|
||||||
|
// make larger data objects readable
|
||||||
|
return `{\n\t${props.join(',\n\t')}\n}`;
|
||||||
|
}
|
||||||
|
|
||||||
|
return `{ ${joined} }`;
|
||||||
|
}
|
||||||
@ -0,0 +1,21 @@
|
|||||||
|
export default {
|
||||||
|
// This is a bit of a funny one — there's no equivalent attribute,
|
||||||
|
// so it can't be server-rendered
|
||||||
|
'skip-ssr': true,
|
||||||
|
|
||||||
|
data: {
|
||||||
|
indeterminate: true
|
||||||
|
},
|
||||||
|
|
||||||
|
html: `
|
||||||
|
<input type='checkbox'>
|
||||||
|
`,
|
||||||
|
|
||||||
|
test(assert, component, target) {
|
||||||
|
const input = target.querySelector('input');
|
||||||
|
|
||||||
|
assert.ok(input.indeterminate);
|
||||||
|
component.set({ indeterminate: false });
|
||||||
|
assert.ok(!input.indeterminate);
|
||||||
|
}
|
||||||
|
};
|
||||||
@ -0,0 +1 @@
|
|||||||
|
<input type='checkbox' indeterminate='{{indeterminate}}'>
|
||||||
@ -0,0 +1,42 @@
|
|||||||
|
export default {
|
||||||
|
'skip-ssr': true,
|
||||||
|
|
||||||
|
data: {
|
||||||
|
indeterminate: true,
|
||||||
|
},
|
||||||
|
|
||||||
|
html: `
|
||||||
|
<input type="checkbox">
|
||||||
|
<p>checked? false</p>
|
||||||
|
<p>indeterminate? true</p>
|
||||||
|
`,
|
||||||
|
|
||||||
|
test(assert, component, target, window) {
|
||||||
|
const input = target.querySelector('input');
|
||||||
|
assert.equal(input.checked, false);
|
||||||
|
assert.equal(input.indeterminate, true);
|
||||||
|
|
||||||
|
const event = new window.Event('change');
|
||||||
|
|
||||||
|
input.checked = true;
|
||||||
|
input.indeterminate = false;
|
||||||
|
input.dispatchEvent(event);
|
||||||
|
|
||||||
|
assert.equal(component.get('indeterminate'), false);
|
||||||
|
assert.equal(component.get('checked'), true);
|
||||||
|
assert.htmlEqual(target.innerHTML, `
|
||||||
|
<input type="checkbox">
|
||||||
|
<p>checked? true</p>
|
||||||
|
<p>indeterminate? false</p>
|
||||||
|
`);
|
||||||
|
|
||||||
|
component.set({ indeterminate: true });
|
||||||
|
assert.equal(input.indeterminate, true);
|
||||||
|
assert.equal(input.checked, true);
|
||||||
|
assert.htmlEqual(target.innerHTML, `
|
||||||
|
<input type="checkbox">
|
||||||
|
<p>checked? true</p>
|
||||||
|
<p>indeterminate? true</p>
|
||||||
|
`);
|
||||||
|
},
|
||||||
|
};
|
||||||
@ -0,0 +1,3 @@
|
|||||||
|
<input type='checkbox' bind:checked bind:indeterminate>
|
||||||
|
<p>checked? {{checked}}</p>
|
||||||
|
<p>indeterminate? {{indeterminate}}</p>
|
||||||
Loading…
Reference in new issue