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feat(8.2-alpha): Addition of "global" context for expressions inside XML #9734

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Merged
merged 3 commits into from
Jan 14, 2022
Merged

feat(8.2-alpha): Addition of "global" context for expressions inside XML #9734

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51056c4
fix: Converter callbacks should have caller as context.
CatchABus Jan 7, 2022
c89b662
fix: Check `global` context for indentifiers too.
CatchABus Jan 7, 2022
9c5b741
fix: Bad context check for `Identifier` expressions.
CatchABus Jan 7, 2022
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25 changes: 16 additions & 9 deletions packages/core/ui/core/bindable/bindable-expressions.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -82,20 +82,23 @@ const expressionParsers = {
object = getContext(expression.callee.name, model, changedModel);
property = expression.callee?.name;
}

const callback = expression.callee.optional ? object?.[property] : object[property];
if (isNullOrUndefined(callback)) {
throw new Error('Cannot perform a call using a null or undefined property');
}

const isConverter = isObject(callback) && (isFunction(callback.toModel) || isFunction(callback.toView));
if (!isFunction(callback) && !isConverter) {
throw new Error('Cannot perform a call using a non-callable property');
}

const parsedArgs = [];
for (let argument of expression.arguments) {
let value = convertExpressionToValue(argument, model, isBackConvert, changedModel);
argument.type == 'SpreadElement' ? parsedArgs.push(...value) : parsedArgs.push(value);
}

if (isNullOrUndefined(callback) || (!isFunction(callback) && !isConverter)) {
throw new Error('Cannot perform a call using a non-function property');
}

return isConverter ? getConverter(callback, parsedArgs, isBackConvert) : callback.apply(object, parsedArgs);
return isConverter ? getConverter(callback, object, parsedArgs, isBackConvert) : callback.apply(object, parsedArgs);
},
'ChainExpression': (expression: ASTExpression, model, isBackConvert: boolean, changedModel) => {
return convertExpressionToValue(expression.expression, model, isBackConvert, changedModel);
Expand Down Expand Up @@ -174,12 +177,16 @@ const expressionParsers = {
};

function getContext(key, model, changedModel) {
return key in changedModel ? changedModel : model;
let context = key in changedModel ? changedModel : model;
if (!(key in context)) {
context = global;
}
return context;
}

function getConverter(context, args, isBackConvert: boolean) {
function getConverter(converterSchema, context, args, isBackConvert: boolean) {
const converter = { callback: null, context, args };
let callback = isBackConvert ? context.toModel : context.toView;
let callback = isBackConvert ? converterSchema.toModel : converterSchema.toView;
if (callback == null) {
callback = Function.prototype;
}
Expand Down