整理した

src/client/app/desktop/views/widgets/channel.channel.form.vue

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+<template>
+<div class="form">
+	<input v-model="text" :disabled="wait" @keydown="onKeydown" placeholder="書いて">
+</div>
+</template>
+
+<script lang="ts">
+import Vue from 'vue';
+export default Vue.extend({
+	data() {
+		return {
+			text: '',
+			wait: false
+		};
+	},
+	methods: {
+		onKeydown(e) {
+			if (e.which == 10 || e.which == 13) this.post();
+		},
+		post() {
+			this.wait = true;
+
+			let reply = null;
+
+			if (/^>>([0-9]+) /.test(this.text)) {
+				const index = this.text.match(/^>>([0-9]+) /)[1];
+				reply = (this.$parent as any).posts.find(p => p.index.toString() == index);
+				this.text = this.text.replace(/^>>([0-9]+) /, '');
+			}
+
+			(this as any).api('posts/create', {
+				text: this.text,
+				replyId: reply ? reply.id : undefined,
+				channelId: (this.$parent as any).channel.id
+			}).then(data => {
+				this.text = '';
+			}).catch(err => {
+				alert('失敗した');
+			}).then(() => {
+				this.wait = false;
+			});
+		}
+	}
+});
+</script>
+
+<style lang="stylus" scoped>
+.form
+	width 100%
+	height 38px
+	padding 4px
+	border-top solid 1px #ddd
+
+	> input
+		padding 0 8px
+		width 100%
+		height 100%
+		font-size 14px
+		color #55595c
+		border solid 1px #dadada
+		border-radius 4px
+
+		&:hover
+		&:focus
+			border-color #aeaeae
+
+</style>