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| 1 | +import { defineComponent, ref, onMounted, watch, onUnmounted, nextTick, computed, getCurrentInstance } from 'vue'; |
| 2 | +import { IMentionSuggestionItem, mentionProps, type MentionProps } from './mention-types'; |
| 3 | +import DTextarea from '../../textarea/src/textarea'; |
| 4 | +import DIcon from '../../icon/src/icon'; |
| 5 | +import './mention.scss'; |
| 6 | +import { useNamespace } from '../../shared/hooks/use-namespace'; |
| 7 | +import { debounce } from 'lodash'; |
| 8 | + |
| 9 | +export default defineComponent({ |
| 10 | + name: 'DMention', |
| 11 | + components: { |
| 12 | + DTextarea, |
| 13 | + DIcon, |
| 14 | + }, |
| 15 | + props: mentionProps, |
| 16 | + emits: ['select', 'change'], |
| 17 | + setup(props: MentionProps, { slots, emit }) { |
| 18 | + const ns = useNamespace('mention'); |
| 19 | + const textContext = ref<string>(''); |
| 20 | + const showSuggestions = ref<boolean>(false); |
| 21 | + const currentIndex = ref<number>(0); |
| 22 | + const suggestionsTop = ref<number>(); |
| 23 | + const suggestions = ref<IMentionSuggestionItem[]>([]); |
| 24 | + const filteredSuggestions = ref<IMentionSuggestionItem[]>([]); |
| 25 | + const suggestionsDom = ref<HTMLDivElement>(); |
| 26 | + const loading = computed(() => props.loading); |
| 27 | + const instance = getCurrentInstance(); |
| 28 | + |
| 29 | + const handleUpdate = debounce((val: string) => { |
| 30 | + if (props.trigger.includes(val[0])) { |
| 31 | + showSuggestions.value = true; |
| 32 | + if (props.position === 'top') { |
| 33 | + nextTick(() => { |
| 34 | + const height = window.getComputedStyle(suggestionsDom.value as Element, null).height; |
| 35 | + suggestionsTop.value = -Number(height.replace('px', '')); |
| 36 | + }); |
| 37 | + } |
| 38 | + filteredSuggestions.value = (suggestions.value as IMentionSuggestionItem[]).filter((item: IMentionSuggestionItem) => |
| 39 | + String(item[props.dmValueParse.value as keyof IMentionSuggestionItem]) |
| 40 | + .toLocaleLowerCase() |
| 41 | + .includes(val.slice(1).toLocaleLowerCase()) |
| 42 | + ); |
| 43 | + } else { |
| 44 | + showSuggestions.value = false; |
| 45 | + } |
| 46 | + emit('change', val.slice(1)); |
| 47 | + }, 300); |
| 48 | + |
| 49 | + const handleBlur = () => { |
| 50 | + setTimeout(() => { |
| 51 | + showSuggestions.value = false; |
| 52 | + }, 100); |
| 53 | + }; |
| 54 | + |
| 55 | + const handleFocus = () => { |
| 56 | + if (props.trigger.includes(textContext.value)) { |
| 57 | + showSuggestions.value = true; |
| 58 | + } |
| 59 | + }; |
| 60 | + |
| 61 | + const clickItem = (item: IMentionSuggestionItem, e: MouseEvent) => { |
| 62 | + emit('select', item); |
| 63 | + e.stopPropagation(); |
| 64 | + e.preventDefault(); |
| 65 | + showSuggestions.value = false; |
| 66 | + textContext.value += item[props.dmValueParse.value as keyof IMentionSuggestionItem]; |
| 67 | + }; |
| 68 | + |
| 69 | + const arrowKeyDown = (e: KeyboardEvent) => { |
| 70 | + if (showSuggestions.value && filteredSuggestions.value.length) { |
| 71 | + if (e.key === 'ArrowDown') { |
| 72 | + currentIndex.value++; |
| 73 | + if (currentIndex.value === filteredSuggestions.value.length) { |
| 74 | + currentIndex.value = 0; |
| 75 | + } |
| 76 | + } |
| 77 | + if (e.key === 'ArrowUp') { |
| 78 | + currentIndex.value--; |
| 79 | + if (currentIndex.value === -1) { |
| 80 | + currentIndex.value = filteredSuggestions.value.length - 1; |
| 81 | + } |
| 82 | + } |
| 83 | + const itemDom = instance?.proxy?.$refs[`devui-suggestions-item-${currentIndex.value}`]; |
| 84 | + const itemOffsetTop = (itemDom as HTMLElement)?.offsetTop; |
| 85 | + const clientHeight = (suggestionsDom.value as HTMLElement)?.clientHeight; |
| 86 | + const itemTotal = Math.ceil(clientHeight / (itemDom as HTMLElement).clientHeight); |
| 87 | + if ((e.key === 'ArrowDown' && currentIndex.value >= itemTotal) || e.key === 'ArrowUp') { |
| 88 | + suggestionsDom.value?.scrollTo({ |
| 89 | + top: itemOffsetTop, |
| 90 | + }); |
| 91 | + } |
| 92 | + } |
| 93 | + }; |
| 94 | + |
| 95 | + const enterKeyDown = (e: KeyboardEvent) => { |
| 96 | + if (showSuggestions.value && filteredSuggestions.value.length) { |
| 97 | + if (e.key === 'Enter') { |
| 98 | + e.stopPropagation(); |
| 99 | + e.preventDefault(); |
| 100 | + showSuggestions.value = false; |
| 101 | + textContext.value += filteredSuggestions.value[currentIndex.value][props.dmValueParse.value as keyof IMentionSuggestionItem]; |
| 102 | + emit('select', filteredSuggestions.value[currentIndex.value]); |
| 103 | + } |
| 104 | + } |
| 105 | + }; |
| 106 | + |
| 107 | + watch( |
| 108 | + () => props.suggestions, |
| 109 | + (val) => { |
| 110 | + suggestions.value = val as IMentionSuggestionItem[]; |
| 111 | + filteredSuggestions.value = val as IMentionSuggestionItem[]; |
| 112 | + }, |
| 113 | + { immediate: true, deep: true } |
| 114 | + ); |
| 115 | + |
| 116 | + onMounted(() => { |
| 117 | + window.addEventListener('keydown', arrowKeyDown); |
| 118 | + window.addEventListener('keydown', enterKeyDown); |
| 119 | + }); |
| 120 | + |
| 121 | + onUnmounted(() => { |
| 122 | + window.removeEventListener('keydown', arrowKeyDown); |
| 123 | + window.removeEventListener('keydown', enterKeyDown); |
| 124 | + }); |
| 125 | + |
| 126 | + return () => { |
| 127 | + return ( |
| 128 | + <div class={ns.b()}> |
| 129 | + <d-textarea v-model={textContext.value} onUpdate={handleUpdate} onBlur={handleBlur} onFocus={handleFocus}></d-textarea> |
| 130 | + {showSuggestions.value ? ( |
| 131 | + loading.value ? ( |
| 132 | + <div class={[`${ns.e('suggestions')} ${ns.e('suggestions-loading')}`]}>加载中... </div> |
| 133 | + ) : ( |
| 134 | + <div |
| 135 | + class={ns.e('suggestions')} |
| 136 | + ref={suggestionsDom} |
| 137 | + style={{ |
| 138 | + marginTop: props.position === 'top' ? '0px' : '-16px', |
| 139 | + top: suggestionsTop.value ? suggestionsTop.value + 'px' : 'inherit', |
| 140 | + }}> |
| 141 | + {filteredSuggestions.value.length > 0 ? ( |
| 142 | + filteredSuggestions.value?.map((item, index) => { |
| 143 | + return ( |
| 144 | + <div |
| 145 | + ref={`devui-suggestions-item-${index}`} |
| 146 | + class={`${ns.e('suggestions-item')} |
| 147 | + ${currentIndex.value === index ? `${ns.e('suggestions-item-active')}` : ''}`} |
| 148 | + key={item.id} |
| 149 | + onClick={(e) => clickItem(item, e)}> |
| 150 | + {slots.template ? slots.template({ item }) : item.value} |
| 151 | + </div> |
| 152 | + ); |
| 153 | + }) |
| 154 | + ) : ( |
| 155 | + <div>{props.notFoundContent}</div> |
| 156 | + )} |
| 157 | + </div> |
| 158 | + ) |
| 159 | + ) : null} |
| 160 | + </div> |
| 161 | + ); |
| 162 | + }; |
| 163 | + }, |
| 164 | +}); |
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