<template>
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<div class="ip-input-container">
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<div class="ip-segment" v-for="(segment, index) in segments" :key="index">
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<input
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type="text"
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maxlength="3"
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class="ip-segment-input"
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:value="segment"
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:placeholder="placeholder"
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:disabled="disabled"
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v-on:keydown="onInputKeydown($event, index)"
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v-on:input="onInput($event, index)"
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v-on:blur="onInputBlur()"
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v-on:paste="onPaste($event, index)"
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/>
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<i v-show="index != segments.length - 1">.</i>
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</div>
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</div>
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</template>
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<script>
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/* global document*/
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/**
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* get the cursor position of the element
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* @param {Element} el the element
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* @return {Integer} the position fo the cursor
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*/
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function getRange(el) {
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var cuRange;
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var tbRange;
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var headRange;
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var range;
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var dupRange;
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var ret = {};
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if (el.setSelectionRange) {
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// standard
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ret.begin = el.selectionStart;
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ret.end = el.selectionEnd;
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ret.result = el.value.substring(ret.begin, ret.end);
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} else if (document.selection) {
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// ie
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if (el.tagName.toLowerCase() === "input") {
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cuRange = document.selection.createRange();
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tbRange = el.createTextRange();
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tbRange.collapse(true);
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tbRange.select();
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headRange = document.selection.createRange();
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headRange.setEndPoint("EndToEnd", cuRange);
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ret.begin = headRange.text.length - cuRange.text.length;
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ret.end = headRange.text.length;
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ret.result = cuRange.text;
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cuRange.select();
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} else if (el.tagName.toLowerCase() === "textarea") {
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range = document.selection.createRange();
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dupRange = range.duplicate();
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dupRange.moveToElementText(el);
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dupRange.setEndPoint("EndToEnd", range);
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ret.begin = dupRange.text.length - range.text.length;
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ret.end = dupRange.text.length;
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ret.result = range.text;
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}
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}
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el.focus();
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return ret;
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}
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export default {
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props: {
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ip: {
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type: String,
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defalut: ""
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},
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item: {},
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placeholder: String,
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onChange: Function,
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onBlur: Function,
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onItemChange: Function,
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disabled: {
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type: Boolean,
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default: false
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}
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},
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data() {
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return {
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segments: ["", "", "", ""]
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};
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},
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watch: {
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ip(ip) {
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this.syncIp(ip);
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}
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},
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methods: {
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onInputKeydown(event, index) {
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var keyCode = event.keyCode || event.which;
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var value = event.target.value;
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if (keyCode === 8 || keyCode === 37) {
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// move the cursor to previous input if backspace and left arrow is pressed at the begin of one input
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if (
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(value.length === 0 || getRange(event.target).end === 0) &&
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index > 0
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) {
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this.$el.getElementsByTagName("input")[index - 1].focus();
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// When jump to pre input(enter "backspace"), thr cursor should in the end.
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// before fix: 127.|0.0.0 => 12|7.0.0.1
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// after fix: 127.|0.0.0 = > 127|.0.0.0
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// notes: "|" mean the cursor position.
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event.preventDefault();
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}
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} else if (keyCode === 39 && keyCode === 110) {
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if (getRange(event.target).end === value.length && index < 3) {
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// move to cursor to the next input if right arrow is pressed at the end of one input
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this.$el.getElementsByTagName("input")[index + 1].focus();
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}
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}
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},
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onInput(event, index) {
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var value = event.target.value;
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event.target.value = this.segments[index];
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var segment = Number(value);
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if (isNaN(segment)) {
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return;
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} else if (value === "") {
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this.segments.splice(index, 1, "");
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} else if (segment > 255 || segment < 0) {
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// set the segment to 255 if out of ip range
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this.segments.splice(index, 1, 255);
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} else {
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this.segments.splice(index, 1, segment);
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}
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// jump to next input
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if (
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(value.length === 3 && index < 3) ||
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value[value.length - 1] === "."
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) {
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this.$el.getElementsByTagName("input")[index + 1].focus();
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}
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},
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onInputBlur() {
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setTimeout(() => {
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this.$emit("on-blur", this.segments.join("."));
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if (this.onBlur) {
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this.onBlur(this.segments.join("."));
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}
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if (this.onItemChange) {
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this.onItemChange(this.segments.join("."), this.item)
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}
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}, 50);
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},
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onPaste(e, index) {
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var pasteText = e.clipboardData.getData("text/plain");
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var segments = pasteText.split(".");
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segments.forEach((segment, i) => {
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if (
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index + i < 4 &&
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!isNaN(segment) &&
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segment >= 0 &&
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segment <= 255
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) {
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this.segments.splice(index + i, 1, segment);
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}
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});
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e.preventDefault();
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},
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syncIp(ip) {
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if (ip && ip.indexOf(".") !== -1) {
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ip.split(".").map((segment, index) => {
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if (isNaN(segment) || segment < 0 || segment > 255) {
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segment = 255;
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}
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this.segments.splice(index, 1, segment);
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return segment;
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});
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}
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}
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},
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mounted() {
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this.syncIp(this.ip);
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this.$watch(
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() => {
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return this.segments.join(".");
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},
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(val, oldValue) => {
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if (val !== oldValue) {
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if (val === "...") {
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val = "";
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}
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if (this.onChange) {
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this.onChange(val);
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}
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}
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}
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);
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}
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};
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</script>
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<style lang="scss" scoped>
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.ip-input-container {
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display: inline-block;
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width: 100%;
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height: 32px;
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line-height: normal;
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border: 1px solid #dcdfe6;
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box-sizing: border-box;
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background-color: #fff;
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text-align: left;
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max-width: 360px;
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}
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.ip-segment {
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display: inline-block;
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width: 25%;
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height: 32px;
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line-height: normal;
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input {
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width: 90%;
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height: 32px;
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line-height: normal;
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border: none;
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outline: none;
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text-align: center;
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text-indent: 0px;
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margin: 0px;
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padding: 0px;
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background-color: transparent;
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}
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i {
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display: inline-block;
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font-size: 18px;
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}
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}
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</style>
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