taggedjs
Version:
tagged template reactive html
80 lines • 3.69 kB
JavaScript
import { forceUpdateExistingValue } from "../index.js";
import { castTextValue } from '../castTextValue.function.js';
import { paintBeforeText, paintCommands, addPaintRemover } from "../render/paint.function.js";
import { BasicTypes } from "../index.js";
import { processUpdateRegularValue } from "../tag/update/processRegularValue.function.js";
import { processSimpleAttribute } from "./processSimpleAttribute.function.js";
import { blankHandler } from "../render/dom/blankHandler.function.js";
export function deleteSimpleAttribute(contextItem) {
const element = contextItem.target;
const name = contextItem.attrName;
element.removeAttribute(name);
}
export function getSimpleTagVar(value) {
return {
component: false,
tagJsType: 'simple',
value,
processInitAttribute: processSimpleAttribute,
processInit: processSimpleValueInit,
destroy: deleteSimpleValue,
// TODO: get to using only checkSimpleValueChange
hasValueChanged: checkUpdateDeleteSimpleValueChange, // For attributes, this gets switched to checkSimpleValueChange
processUpdate: processStringUpdate, // For attributes, this gets switched to processAttributeUpdate
// processUpdate: tagValueUpdateHandler, // For attributes, this gets switched to processAttributeUpdate
};
}
function processStringUpdate(newValue, // newValue
contextItem, ownerSupport) {
if (newValue === contextItem.value) {
return 0;
}
return forceUpdateExistingValue(contextItem, newValue, ownerSupport);
}
function processSimpleValueInit(value, // TemplateValue | StringTag | SubscribeValue | SignalObject,
contextItem, ownerSupport, insertBefore, _appendTo) {
const castedValue = castTextValue(value);
insertBefore = contextItem.placeholder;
// always insertBefore for content
const paint = contextItem.paint = [paintBeforeText, [insertBefore, castedValue, function afterSimpleValue(x) {
contextItem.simpleValueElm = x;
delete contextItem.paint;
}, 'processSimpleValueInit']];
paintCommands.push(paint);
}
export function deleteSimpleValue(context) {
const elm = context.simpleValueElm;
if (!elm) {
// it has not hit the document yet
if (context.paint) {
context.paint[0] = blankHandler;
return; // I'm being deleted before my first render even occurred
}
const skip = context.value === undefined || context.value === false || context.value === null;
if (skip) {
return; // never had an element put down
}
}
delete context.simpleValueElm;
addPaintRemover(elm, 'deleteSimpleValue');
}
export function checkSimpleValueChange(newValue, contextItem) {
const isBadValue = newValue === null || newValue === undefined;
const isRegularUpdate = isBadValue || newValue === contextItem.value; // !(typeof(newValue) === BasicTypes.object)
if (isRegularUpdate) {
return 0; // no need to destroy, just update display
}
return 6; // 'changed-simple-value'
}
export function checkUpdateDeleteSimpleValueChange(newValue, contextItem) {
const isBadValue = newValue === null || newValue === undefined;
const isRegularUpdate = isBadValue || !([BasicTypes.object, BasicTypes.function].includes(typeof (newValue)));
if (isRegularUpdate) {
// This will cause all other values to render
processUpdateRegularValue(newValue, contextItem);
return 0; // no need to destroy, just update display
}
deleteSimpleValue(contextItem);
return 6; // 'changed-simple-value'
}
//# sourceMappingURL=getSimpleTagVar.function.js.map