370 lines
14 KiB
Vue
370 lines
14 KiB
Vue
<template>
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<div :class="cx('root')" :style="sx('root')" :data-p-resizing="false" v-bind="ptm('root')" data-pc-name="splitter">
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<template v-for="(panel, i) of panels" :key="i">
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<component :is="panel" tabindex="-1"></component>
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<div
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v-if="i !== panels.length - 1"
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ref="gutter"
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:class="cx('gutter')"
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role="separator"
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tabindex="-1"
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@mousedown="onGutterMouseDown($event, i)"
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@touchstart="onGutterTouchStart($event, i)"
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@touchmove="onGutterTouchMove($event, i)"
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@touchend="onGutterTouchEnd($event, i)"
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:data-p-gutter-resizing="false"
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v-bind="ptm('gutter')"
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>
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<div :class="cx('gutterHandler')" tabindex="0" :style="[gutterStyle]" :aria-orientation="layout" :aria-valuenow="prevSize" @keyup="onGutterKeyUp" @keydown="onGutterKeyDown($event, i)" v-bind="ptm('gutterHandler')"></div>
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</div>
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</template>
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</div>
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</template>
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<script>
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import { DomHandler, ObjectUtils } from 'primevue/utils';
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import BaseSplitter from './BaseSplitter.vue';
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export default {
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name: 'Splitter',
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extends: BaseSplitter,
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emits: ['resizestart', 'resizeend'],
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dragging: false,
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mouseMoveListener: null,
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mouseUpListener: null,
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touchMoveListener: null,
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touchEndListener: null,
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size: null,
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gutterElement: null,
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startPos: null,
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prevPanelElement: null,
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nextPanelElement: null,
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nextPanelSize: null,
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prevPanelSize: null,
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panelSizes: null,
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prevPanelIndex: null,
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timer: null,
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data() {
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return {
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prevSize: null
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};
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},
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mounted() {
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if (this.panels && this.panels.length) {
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let initialized = false;
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if (this.isStateful()) {
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initialized = this.restoreState();
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}
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if (!initialized) {
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let children = [...this.$el.children].filter((child) => child.getAttribute('data-pc-name') === 'splitterpanel');
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let _panelSizes = [];
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this.panels.map((panel, i) => {
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let panelInitialSize = panel.props && panel.props.size ? panel.props.size : null;
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let panelSize = panelInitialSize || 100 / this.panels.length;
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_panelSizes[i] = panelSize;
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children[i].style.flexBasis = 'calc(' + panelSize + '% - ' + (this.panels.length - 1) * this.gutterSize + 'px)';
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});
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this.panelSizes = _panelSizes;
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this.prevSize = parseFloat(_panelSizes[0]).toFixed(4);
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}
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}
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},
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beforeUnmount() {
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this.clear();
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this.unbindMouseListeners();
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},
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methods: {
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isSplitterPanel(child) {
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return child.type.name === 'SplitterPanel';
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},
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onResizeStart(event, index, isKeyDown) {
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this.gutterElement = event.currentTarget || event.target.parentElement;
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this.size = this.horizontal ? DomHandler.getWidth(this.$el) : DomHandler.getHeight(this.$el);
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if (!isKeyDown) {
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this.dragging = true;
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this.startPos = this.layout === 'horizontal' ? event.pageX || event.changedTouches[0].pageX : event.pageY || event.changedTouches[0].pageY;
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}
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this.prevPanelElement = this.gutterElement.previousElementSibling;
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this.nextPanelElement = this.gutterElement.nextElementSibling;
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if (isKeyDown) {
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this.prevPanelSize = this.horizontal ? DomHandler.getOuterWidth(this.prevPanelElement, true) : DomHandler.getOuterHeight(this.prevPanelElement, true);
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this.nextPanelSize = this.horizontal ? DomHandler.getOuterWidth(this.nextPanelElement, true) : DomHandler.getOuterHeight(this.nextPanelElement, true);
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} else {
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this.prevPanelSize = (100 * (this.horizontal ? DomHandler.getOuterWidth(this.prevPanelElement, true) : DomHandler.getOuterHeight(this.prevPanelElement, true))) / this.size;
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this.nextPanelSize = (100 * (this.horizontal ? DomHandler.getOuterWidth(this.nextPanelElement, true) : DomHandler.getOuterHeight(this.nextPanelElement, true))) / this.size;
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}
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this.prevPanelIndex = index;
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this.$emit('resizestart', { originalEvent: event, sizes: this.panelSizes });
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this.$refs.gutter[index].setAttribute('data-p-gutter-resizing', true);
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this.$el.setAttribute('data-p-resizing', true);
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},
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onResize(event, step, isKeyDown) {
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let newPos, newPrevPanelSize, newNextPanelSize;
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if (isKeyDown) {
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if (this.horizontal) {
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newPrevPanelSize = (100 * (this.prevPanelSize + step)) / this.size;
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newNextPanelSize = (100 * (this.nextPanelSize - step)) / this.size;
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} else {
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newPrevPanelSize = (100 * (this.prevPanelSize - step)) / this.size;
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newNextPanelSize = (100 * (this.nextPanelSize + step)) / this.size;
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}
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} else {
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if (this.horizontal) newPos = (event.pageX * 100) / this.size - (this.startPos * 100) / this.size;
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else newPos = (event.pageY * 100) / this.size - (this.startPos * 100) / this.size;
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newPrevPanelSize = this.prevPanelSize + newPos;
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newNextPanelSize = this.nextPanelSize - newPos;
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}
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this.prevSize = parseFloat(newPrevPanelSize).toFixed(4);
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if (this.validateResize(newPrevPanelSize, newNextPanelSize)) {
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this.prevPanelElement.style.flexBasis = 'calc(' + newPrevPanelSize + '% - ' + (this.panels.length - 1) * this.gutterSize + 'px)';
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this.nextPanelElement.style.flexBasis = 'calc(' + newNextPanelSize + '% - ' + (this.panels.length - 1) * this.gutterSize + 'px)';
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this.panelSizes[this.prevPanelIndex] = newPrevPanelSize;
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this.panelSizes[this.prevPanelIndex + 1] = newNextPanelSize;
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}
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},
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onResizeEnd(event) {
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if (this.isStateful()) {
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this.saveState();
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}
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this.$emit('resizeend', { originalEvent: event, sizes: this.panelSizes });
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this.$refs.gutter.forEach((gutter) => gutter.setAttribute('data-p-gutter-resizing', false));
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this.$el.setAttribute('data-p-resizing', false);
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this.clear();
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},
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repeat(event, index, step) {
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this.onResizeStart(event, index, true);
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this.onResize(event, step, true);
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},
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setTimer(event, index, step) {
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this.clearTimer();
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this.timer = setTimeout(() => {
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this.repeat(event, index, step);
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}, 40);
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},
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clearTimer() {
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if (this.timer) {
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clearTimeout(this.timer);
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}
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},
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onGutterKeyUp() {
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this.clearTimer();
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this.onResizeEnd();
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},
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onGutterKeyDown(event, index) {
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switch (event.code) {
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case 'ArrowLeft': {
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if (this.layout === 'horizontal') {
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this.setTimer(event, index, this.step * -1);
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}
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event.preventDefault();
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break;
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}
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case 'ArrowRight': {
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if (this.layout === 'horizontal') {
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this.setTimer(event, index, this.step);
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}
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event.preventDefault();
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break;
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}
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case 'ArrowDown': {
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if (this.layout === 'vertical') {
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this.setTimer(event, index, this.step * -1);
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}
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event.preventDefault();
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break;
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}
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case 'ArrowUp': {
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if (this.layout === 'vertical') {
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this.setTimer(event, index, this.step);
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}
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event.preventDefault();
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break;
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}
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default:
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//no op
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break;
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}
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},
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onGutterMouseDown(event, index) {
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this.onResizeStart(event, index);
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this.bindMouseListeners();
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},
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onGutterTouchStart(event, index) {
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this.onResizeStart(event, index);
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this.bindTouchListeners();
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event.preventDefault();
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},
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onGutterTouchMove(event) {
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this.onResize(event);
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event.preventDefault();
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},
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onGutterTouchEnd(event) {
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this.onResizeEnd(event);
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this.unbindTouchListeners();
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event.preventDefault();
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},
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bindMouseListeners() {
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if (!this.mouseMoveListener) {
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this.mouseMoveListener = (event) => this.onResize(event);
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document.addEventListener('mousemove', this.mouseMoveListener);
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}
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if (!this.mouseUpListener) {
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this.mouseUpListener = (event) => {
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this.onResizeEnd(event);
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this.unbindMouseListeners();
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};
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document.addEventListener('mouseup', this.mouseUpListener);
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}
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},
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bindTouchListeners() {
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if (!this.touchMoveListener) {
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this.touchMoveListener = (event) => this.onResize(event.changedTouches[0]);
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document.addEventListener('touchmove', this.touchMoveListener);
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}
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if (!this.touchEndListener) {
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this.touchEndListener = (event) => {
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this.resizeEnd(event);
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this.unbindTouchListeners();
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};
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document.addEventListener('touchend', this.touchEndListener);
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}
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},
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validateResize(newPrevPanelSize, newNextPanelSize) {
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let prevPanelMinSize = ObjectUtils.getVNodeProp(this.panels[0], 'minSize');
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if (this.panels[0].props && prevPanelMinSize && prevPanelMinSize > newPrevPanelSize) {
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return false;
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}
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let newPanelMinSize = ObjectUtils.getVNodeProp(this.panels[1], 'minSize');
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if (this.panels[1].props && newPanelMinSize && newPanelMinSize > newNextPanelSize) {
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return false;
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}
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return true;
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},
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unbindMouseListeners() {
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if (this.mouseMoveListener) {
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document.removeEventListener('mousemove', this.mouseMoveListener);
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this.mouseMoveListener = null;
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}
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if (this.mouseUpListener) {
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document.removeEventListener('mouseup', this.mouseUpListener);
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this.mouseUpListener = null;
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}
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},
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unbindTouchListeners() {
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if (this.touchMoveListener) {
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document.removeEventListener('touchmove', this.touchMoveListener);
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this.touchMoveListener = null;
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}
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if (this.touchEndListener) {
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document.removeEventListener('touchend', this.touchEndListener);
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this.touchEndListener = null;
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}
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},
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clear() {
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this.dragging = false;
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this.size = null;
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this.startPos = null;
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this.prevPanelElement = null;
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this.nextPanelElement = null;
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this.prevPanelSize = null;
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this.nextPanelSize = null;
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this.gutterElement = null;
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this.prevPanelIndex = null;
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},
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isStateful() {
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return this.stateKey != null;
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},
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getStorage() {
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switch (this.stateStorage) {
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case 'local':
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return window.localStorage;
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case 'session':
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return window.sessionStorage;
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default:
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throw new Error(this.stateStorage + ' is not a valid value for the state storage, supported values are "local" and "session".');
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}
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},
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saveState() {
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this.getStorage().setItem(this.stateKey, JSON.stringify(this.panelSizes));
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},
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restoreState() {
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const storage = this.getStorage();
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const stateString = storage.getItem(this.stateKey);
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if (stateString) {
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this.panelSizes = JSON.parse(stateString);
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let children = [...this.$el.children].filter((child) => child.getAttribute('data-pc-name') === 'splitterpanel');
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children.forEach((child, i) => {
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child.style.flexBasis = 'calc(' + this.panelSizes[i] + '% - ' + (this.panels.length - 1) * this.gutterSize + 'px)';
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});
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return true;
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}
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return false;
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}
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},
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computed: {
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panels() {
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const panels = [];
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this.$slots.default().forEach((child) => {
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if (this.isSplitterPanel(child)) {
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panels.push(child);
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} else if (child.children instanceof Array) {
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child.children.forEach((nestedChild) => {
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if (this.isSplitterPanel(nestedChild)) {
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panels.push(nestedChild);
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}
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});
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}
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});
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return panels;
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},
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gutterStyle() {
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if (this.horizontal) return { width: this.gutterSize + 'px' };
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else return { height: this.gutterSize + 'px' };
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},
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horizontal() {
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return this.layout === 'horizontal';
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}
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}
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};
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</script>
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