610 lines
19 KiB
Vue
Executable File
610 lines
19 KiB
Vue
Executable File
<template>
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<div ref="container" :class="containerClass" @click="onClick($event)">
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<div class="p-hidden-accessible">
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<input ref="focusInput" type="text" :id="inputId" readonly :disabled="disabled" @focus="onFocus" @blur="onBlur" @keydown="onKeyDown" :tabindex="tabindex"
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aria-haspopup="listbox" :aria-expanded="overlayVisible" :aria-labelledby="ariaLabelledBy"/>
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</div>
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<input v-if="editable" type="text" class="p-dropdown-label p-inputtext" :disabled="disabled" @focus="onFocus" @blur="onBlur" :placeholder="placeholder" :value="editableInputValue" @input="onEditableInput"
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aria-haspopup="listbox" :aria-expanded="overlayVisible">
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<span v-if="!editable" :class="labelClass">
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<slot name="value" :value="modelValue" :placeholder="placeholder">
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{{label}}
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</slot>
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</span>
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<i v-if="showClear && modelValue != null" class="p-dropdown-clear-icon pi pi-times" @click="onClearClick($event)"></i>
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<div class="p-dropdown-trigger" role="button" aria-haspopup="listbox" :aria-expanded="overlayVisible">
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<span class="p-dropdown-trigger-icon pi pi-chevron-down"></span>
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</div>
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<transition name="p-connected-overlay" @enter="onOverlayEnter" @leave="onOverlayLeave">
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<div :ref="overlayRef" class="p-dropdown-panel p-component" v-if="overlayVisible">
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<div class="p-dropdown-header" v-if="filter">
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<div class="p-dropdown-filter-container">
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<input type="text" ref="filterInput" v-model="filterValue" autoComplete="off" class="p-dropdown-filter p-inputtext p-component" :placeholder="filterPlaceholder" @keydown="onFilterKeyDown" @input="onFilterChange"/>
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<span class="p-dropdown-filter-icon pi pi-search"></span>
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</div>
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</div>
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<div class="p-dropdown-items-wrapper" :style="{'max-height': scrollHeight}">
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<ul class="p-dropdown-items" role="listbox">
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<li v-for="(option, i) of visibleOptions" :class="['p-dropdown-item', {'p-highlight': isSelected(option), 'p-disabled': isOptionDisabled(option)}]" v-ripple
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:aria-label="getOptionLabel(option)" :key="getOptionRenderKey(option)" @click="onOptionSelect($event, option)" role="option" :aria-selected="isSelected(option)">
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<slot name="option" :option="option" :index="i">
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{{getOptionLabel(option)}}
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</slot>
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</li>
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<li v-if="filterValue && (!visibleOptions || (visibleOptions && visibleOptions.length === 0))" class="p-dropdown-empty-message">{{emptyFilterMessage}}</li>
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</ul>
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</div>
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</div>
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</transition>
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</div>
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</template>
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<script>
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import ConnectedOverlayScrollHandler from '../utils/ConnectedOverlayScrollHandler';
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import ObjectUtils from '../utils/ObjectUtils';
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import DomHandler from '../utils/DomHandler';
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import Ripple from '../ripple/Ripple';
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export default {
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emits: ['update:modelValue', 'before-show', 'before-hide', 'show', 'hide', 'change', 'filter'],
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props: {
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modelValue: null,
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options: Array,
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optionLabel: null,
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optionValue: null,
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optionDisabled: null,
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scrollHeight: {
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type: String,
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default: '200px'
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},
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filter: Boolean,
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filterPlaceholder: String,
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filterLocale: String,
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editable: Boolean,
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placeholder: String,
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disabled: Boolean,
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dataKey: null,
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showClear: Boolean,
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inputId: String,
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tabindex: String,
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ariaLabelledBy: null,
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appendTo: {
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type: String,
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default: null
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},
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emptyFilterMessage: {
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type: String,
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default: 'No results found'
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}
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},
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data() {
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return {
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focused: false,
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filterValue: null,
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overlayVisible: false
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};
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},
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outsideClickListener: null,
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scrollHandler: null,
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resizeListener: null,
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searchTimeout: null,
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currentSearchChar: null,
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previousSearchChar: null,
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searchValue: null,
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overlay: null,
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beforeUnmount() {
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this.restoreAppend();
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this.unbindOutsideClickListener();
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this.unbindResizeListener();
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if (this.scrollHandler) {
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this.scrollHandler.destroy();
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this.scrollHandler = null;
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}
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this.overlay = null;
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},
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methods: {
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getOptionLabel(option) {
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return this.optionLabel ? ObjectUtils.resolveFieldData(option, this.optionLabel) : option;
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},
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getOptionValue(option) {
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return this.optionValue ? ObjectUtils.resolveFieldData(option, this.optionValue) : option;
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},
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getOptionRenderKey(option) {
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return this.dataKey ? ObjectUtils.resolveFieldData(option, this.dataKey) : this.getOptionLabel(option);
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},
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isOptionDisabled(option) {
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return this.optionDisabled ? ObjectUtils.resolveFieldData(option, this.optionDisabled) : false;
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},
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getSelectedOption() {
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let selectedOption;
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if (this.modelValue != null && this.options) {
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for (let option of this.options) {
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if ((ObjectUtils.equals(this.modelValue, this.getOptionValue(option), this.equalityKey))) {
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selectedOption = option;
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break;
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}
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}
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}
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return selectedOption;
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},
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isSelected(option) {
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return ObjectUtils.equals(this.modelValue, this.getOptionValue(option), this.equalityKey);
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},
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getSelectedOptionIndex() {
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let selectedOptionIndex = -1;
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if (this.modelValue != null && this.visibleOptions) {
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for (let i = 0; i < this.visibleOptions.length; i++) {
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if ((ObjectUtils.equals(this.modelValue, this.getOptionValue(this.visibleOptions[i]), this.equalityKey))) {
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selectedOptionIndex = i;
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break;
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}
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}
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}
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return selectedOptionIndex;
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},
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show() {
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this.$emit('before-show');
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this.overlayVisible = true;
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},
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hide() {
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this.$emit('before-hide');
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this.overlayVisible = false;
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},
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onFocus() {
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this.focused = true;
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},
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onBlur() {
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this.focused = false;
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},
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onKeyDown(event) {
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switch(event.which) {
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//down
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case 40:
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this.onDownKey(event);
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break;
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//up
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case 38:
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this.onUpKey(event);
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break;
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//space
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case 32:
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if (!this.overlayVisible) {
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this.show();
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event.preventDefault();
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}
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break;
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//enter and escape
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case 13:
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case 27:
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if (this.overlayVisible) {
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this.hide();
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event.preventDefault();
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}
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break;
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//tab
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case 9:
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this.hide();
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break;
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default:
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this.search(event);
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break;
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}
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},
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onFilterKeyDown(event) {
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switch (event.which) {
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//down
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case 40:
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this.onDownKey(event);
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break;
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//up
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case 38:
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this.onUpKey(event);
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break;
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//enter and escape
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case 13:
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case 27:
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this.overlayVisible = false;
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event.preventDefault();
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break;
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default:
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break;
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}
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},
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onDownKey(event) {
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if (this.visibleOptions) {
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if (!this.overlayVisible && event.altKey) {
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this.show();
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}
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else {
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let nextOption = this.findNextOption(this.getSelectedOptionIndex());
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if (nextOption) {
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this.updateModel(event, this.getOptionValue(nextOption));
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}
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}
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}
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event.preventDefault();
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},
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onUpKey(event) {
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if (this.visibleOptions) {
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let prevOption = this.findPrevOption(this.getSelectedOptionIndex());
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if (prevOption) {
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this.updateModel(event, this.getOptionValue(prevOption));
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}
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}
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event.preventDefault();
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},
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findNextOption(index) {
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let i = index + 1;
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if (i === this.visibleOptions.length) {
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return null;
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}
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let option = this.visibleOptions[i];
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if (this.isOptionDisabled(option))
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return this.findNextOption(i);
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else
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return option;
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},
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findPrevOption(index) {
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let i = index - 1;
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if (i < 0) {
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return null;
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}
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let option = this.visibleOptions[i];
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if (this.isOptionDisabled(option))
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return this.findPrevOption(i);
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else
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return option;
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},
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onClearClick(event) {
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this.updateModel(event, null);
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},
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onClick(event) {
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if (this.disabled) {
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return;
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}
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if (DomHandler.hasClass(event.target, 'p-dropdown-clear-icon') || event.target.tagName === 'INPUT') {
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return;
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}
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else if (!this.overlay || !this.overlay.contains(event.target)) {
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if (this.overlayVisible)
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this.hide();
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else
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this.show();
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this.$refs.focusInput.focus();
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}
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},
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onOptionSelect(event, option) {
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let value = this.getOptionValue(option);
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this.updateModel(event, value);
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this.$refs.focusInput.focus();
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setTimeout(() => {
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this.hide();
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}, 200);
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},
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onEditableInput(event) {
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this.$emit('update:modelValue', event.target.value);
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},
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onOverlayEnter() {
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this.overlay.style.zIndex = String(DomHandler.generateZIndex());
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this.appendContainer();
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this.alignOverlay();
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this.bindOutsideClickListener();
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this.bindScrollListener();
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this.bindResizeListener();
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if (this.filter) {
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this.$refs.filterInput.focus();
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}
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this.$emit('show');
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},
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onOverlayLeave() {
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this.unbindOutsideClickListener();
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this.unbindScrollListener();
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this.unbindResizeListener();
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this.$emit('hide');
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this.overlay = null;
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},
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alignOverlay() {
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if (this.appendTo) {
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DomHandler.absolutePosition(this.overlay, this.$el);
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this.overlay.style.minWidth = DomHandler.getOuterWidth(this.$el) + 'px';
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} else {
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DomHandler.relativePosition(this.overlay, this.$el);
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}
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},
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updateModel(event, value) {
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this.$emit('update:modelValue', value);
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this.$emit('change', {originalEvent: event, value: value});
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},
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bindOutsideClickListener() {
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if (!this.outsideClickListener) {
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this.outsideClickListener = (event) => {
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if (this.overlayVisible && this.overlay && !this.$el.contains(event.target) && !this.overlay.contains(event.target)) {
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this.hide();
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}
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};
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document.addEventListener('click', this.outsideClickListener);
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}
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},
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unbindOutsideClickListener() {
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if (this.outsideClickListener) {
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document.removeEventListener('click', this.outsideClickListener);
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this.outsideClickListener = null;
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}
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},
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bindScrollListener() {
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if (!this.scrollHandler) {
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this.scrollHandler = new ConnectedOverlayScrollHandler(this.$refs.container, () => {
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if (this.overlayVisible) {
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this.hide();
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}
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});
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}
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this.scrollHandler.bindScrollListener();
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},
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unbindScrollListener() {
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if (this.scrollHandler) {
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this.scrollHandler.unbindScrollListener();
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}
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},
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bindResizeListener() {
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if (!this.resizeListener) {
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this.resizeListener = () => {
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if (this.overlayVisible) {
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this.hide();
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}
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};
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window.addEventListener('resize', this.resizeListener);
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}
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},
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unbindResizeListener() {
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if (this.resizeListener) {
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window.removeEventListener('resize', this.resizeListener);
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this.resizeListener = null;
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}
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},
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search(event) {
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if (!this.visibleOptions) {
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return;
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}
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if (this.searchTimeout) {
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clearTimeout(this.searchTimeout);
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}
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const char = String.fromCharCode(event.keyCode);
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this.previousSearchChar = this.currentSearchChar;
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this.currentSearchChar = char;
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if (this.previousSearchChar === this.currentSearchChar)
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this.searchValue = this.currentSearchChar;
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else
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this.searchValue = this.searchValue ? this.searchValue + char : char;
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let searchIndex = this.getSelectedOptionIndex();
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let newOption = this.searchOption(++searchIndex);
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if (newOption) {
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this.updateModel(event, this.getOptionValue(newOption));
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}
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this.searchTimeout = setTimeout(() => {
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this.searchValue = null;
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}, 250);
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},
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searchOption(index) {
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let option;
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if (this.searchValue) {
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option = this.searchOptionInRange(index, this.visibleOptions.length);
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if (!option) {
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option = this.searchOptionInRange(0, index);
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}
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}
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return option;
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},
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searchOptionInRange(start, end) {
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for (let i = start; i < end; i++) {
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let opt = this.visibleOptions[i];
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let label = this.getOptionLabel(opt).toLocaleLowerCase(this.filterLocale);
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if (label.startsWith(this.searchValue.toLocaleLowerCase(this.filterLocale))) {
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return opt;
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}
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}
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return null;
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},
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appendContainer() {
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if (this.appendTo) {
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if (this.appendTo === 'body')
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document.body.appendChild(this.overlay);
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else
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document.getElementById(this.appendTo).appendChild(this.overlay);
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}
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},
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restoreAppend() {
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if (this.overlay && this.appendTo) {
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if (this.appendTo === 'body')
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document.body.removeChild(this.overlay);
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else
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document.getElementById(this.appendTo).removeChild(this.overlay);
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}
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},
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onFilterChange(event) {
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this.$emit('filter', {originalEvent: event, value: event.target.value});
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if (this.overlayVisible) {
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this.alignOverlay();
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}
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},
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overlayRef(el) {
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this.overlay = el;
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}
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},
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computed: {
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visibleOptions() {
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if (this.filterValue && this.filterValue.trim().length > 0)
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return this.options.filter(option => this.getOptionLabel(option).toLocaleLowerCase(this.filterLocale).indexOf(this.filterValue.toLocaleLowerCase(this.filterLocale)) > -1);
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else
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return this.options;
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},
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containerClass() {
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return [
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'p-dropdown p-component p-inputwrapper',
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{
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'p-disabled': this.disabled,
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'p-dropdown-clearable': this.showClear && !this.disabled,
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'p-focus': this.focused,
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'p-inputwrapper-filled': this.modelValue,
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'p-inputwrapper-focus': this.focused
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}
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];
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},
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labelClass() {
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return [
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'p-dropdown-label p-inputtext',
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{
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'p-placeholder': this.label === this.placeholder,
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'p-dropdown-label-empty': !this.$slots['value'] && (this.label === 'p-emptylabel' || this.label.length === 0)
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}
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];
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},
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label() {
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let selectedOption = this.getSelectedOption();
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if (selectedOption)
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return this.getOptionLabel(selectedOption);
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else
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return this.placeholder||'p-emptylabel';
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},
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editableInputValue() {
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let selectedOption = this.getSelectedOption();
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if (selectedOption)
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return this.getOptionLabel(selectedOption);
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else
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return this.modelValue;
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},
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equalityKey() {
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return this.optionValue ? null : this.dataKey;
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}
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},
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directives: {
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'ripple': Ripple
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}
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}
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</script>
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<style>
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.p-dropdown {
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display: inline-flex;
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cursor: pointer;
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position: relative;
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user-select: none;
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}
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.p-dropdown-clear-icon {
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position: absolute;
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top: 50%;
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margin-top: -.5rem;
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}
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.p-dropdown-trigger {
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display: flex;
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align-items: center;
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justify-content: center;
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flex-shrink: 0;
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}
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.p-dropdown-label {
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display: block;
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white-space: nowrap;
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overflow: hidden;
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flex: 1 1 auto;
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width: 1%;
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text-overflow: ellipsis;
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cursor: pointer;
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}
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.p-dropdown-label-empty {
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overflow: hidden;
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visibility: hidden;
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}
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input.p-dropdown-label {
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cursor: default;
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}
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.p-dropdown .p-dropdown-panel {
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min-width: 100%;
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}
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.p-dropdown-panel {
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position: absolute;
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}
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.p-dropdown-items-wrapper {
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overflow: auto;
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}
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|
|
.p-dropdown-item {
|
|
cursor: pointer;
|
|
font-weight: normal;
|
|
white-space: nowrap;
|
|
position: relative;
|
|
overflow: hidden;
|
|
}
|
|
|
|
.p-dropdown-items {
|
|
margin: 0;
|
|
padding: 0;
|
|
list-style-type: none;
|
|
}
|
|
|
|
.p-dropdown-filter {
|
|
width: 100%;
|
|
}
|
|
|
|
.p-dropdown-filter-container {
|
|
position: relative;
|
|
}
|
|
|
|
.p-dropdown-filter-icon {
|
|
position: absolute;
|
|
top: 50%;
|
|
margin-top: -.5rem;
|
|
}
|
|
|
|
.p-fluid .p-dropdown {
|
|
display: flex;
|
|
}
|
|
|
|
.p-fluid .p-dropdown .p-dropdown-label {
|
|
width: 1%;
|
|
}
|
|
</style>
|