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WikiLambda Vue interface module for selecting a generic type, which can be terminal
(reference) or non terminal (function call which requires arguments)
@copyright 2020– Abstract Wikipedia team; see AUTHORS.txt
@license MIT
-->
<template>
<div class="ext-wikilambda-function-type-selector">
<!-- Main type selector -->
<cdx-field>
<template #label>
{{ label }}
</template>
<wl-z-object-selector
:disabled="disabled"
:placeholder="placeholder"
:row-id="rowId"
:selected-zid="selectedZid"
:type="type"
:return-type="type"
:strict-type="true"
@input="setValue"
></wl-z-object-selector>
</cdx-field>
<!-- Argument selectors -->
<div
v-if="hasSelected && !selectedIsTerminal"
class="ext-wikilambda-function-type-selector__args"
>
<wl-type-selector
v-for="arg of genericTypeArgs"
:key="'type-' + rowId + '-arg-' + arg.id"
data-testid="type-selector-arg"
:row-id="arg.id"
:label="getLabel( arg.key )"
:type="getExpectedTypeOfKey( arg.key )"
:disabled="disabled"
:placeholder="placeholder"
></wl-type-selector>
</div>
</div>
</template>
<script>
const { defineComponent } = require( 'vue' );
const Constants = require( '../../Constants.js' ),
typeUtils = require( '../../mixins/typeUtils.js' ),
ZObjectSelector = require( './ZObjectSelector.vue' ),
CdxField = require( '@wikimedia/codex' ).CdxField,
mapActions = require( 'vuex' ).mapActions,
mapGetters = require( 'vuex' ).mapGetters;
module.exports = exports = defineComponent( {
name: 'wl-type-selector',
components: {
'cdx-field': CdxField,
'wl-z-object-selector': ZObjectSelector
},
mixins: [ typeUtils ],
props: {
rowId: {
type: Number,
required: true
},
disabled: {
type: Boolean,
default: false
},
type: {
type: String,
default: ''
},
placeholder: {
type: String,
default: ''
},
label: {
type: String,
default: ''
}
},
computed: Object.assign( mapGetters( [
'getExpectedTypeOfKey',
'getLabel',
'getStoredObject',
'getZObjectTypeByRowId',
'getZFunctionCallFunctionId',
'getZFunctionCallArguments',
'getZReferenceTerminalValue'
] ), {
/**
* Returns the string type (mode) of the selected value,
* which can be a Reference/Z9 or a Function call/Z7.
*
* @return {string}
*/
selectedMode: function () {
return this.typeToString( this.getZObjectTypeByRowId( this.rowId ) );
},
/**
* Returns whether the selected value is terminal
* (Reference/Z9) or non-terminal (Function call/Z7).
*
* @return {boolean}
*/
selectedIsTerminal: function () {
return this.selectedMode === Constants.Z_REFERENCE;
},
/**
* Returns the selected value.
*
* @return {string}
*/
selectedZid: function () {
// If terminal, return the Zid of the selected reference;
// else, return the Zid of the selected function call.
return this.selectedIsTerminal ?
this.getZReferenceTerminalValue( this.rowId ) :
this.getZFunctionCallFunctionId( this.rowId );
},
/**
* Returns whether the field has any selected value.
*
* @return {boolean}
*/
hasSelected: function () {
return !!this.selectedZid;
},
/**
* Returns the arguments of generic type function call
*
* @return {Array}
*/
genericTypeArgs: function () {
return this.selectedIsTerminal ? [] : this.getZFunctionCallArguments( this.rowId );
}
} ),
methods: Object.assign( mapActions( [
'changeType',
'setZFunctionCallArguments'
] ), {
/**
* Persists the selected value in the global store.
* If the selected value is of the required type, we persist as a reference
* Else, the selected value is a function that returns the required type,
* so we persist as a function call and fill up with the necessary arguments.
*
* @param {string} value
*/
setValue: function ( value ) {
// TODO: what happens when we clear the field but we don't
// select a new value? What happens when we write something in the
// field but we don't select a value?
const zobject = this.getStoredObject( value );
if ( !zobject ) {
// This should not happen, the objects are requested as soon as the
// lookup menu is displayed, so they should be available by now.
return;
}
const type = this.getZObjectType( zobject[ Constants.Z_PERSISTENTOBJECT_VALUE ] );
// If the selected object type is equal to this.type, the selection is
// terminal: we set a reference. If not terminal, we set a function call.
const mode = ( type === this.type ) ? Constants.Z_REFERENCE : Constants.Z_FUNCTION_CALL;
this.changeType( {
id: this.rowId,
type: mode,
value
} );
// If the selected object is a function call, we set up its arguments:
if ( mode === Constants.Z_FUNCTION_CALL ) {
this.setZFunctionCallArguments( {
parentId: this.rowId,
functionZid: value
} );
}
}
} )
} );
</script>
<style lang="less">
@import '../../ext.wikilambda.edit.variables.less';
.ext-wikilambda-function-type-selector {
margin-bottom: @spacing-100;
&:last-child {
margin-bottom: 0;
}
&__args {
margin-top: @spacing-100;
margin-left: @spacing-100;
}
}
</style>
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