107 lines
3.1 KiB
JavaScript
107 lines
3.1 KiB
JavaScript
/*
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Copyright 2019 New Vector Ltd
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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export default class ResizeItem {
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constructor(handle, resizer, sizer) {
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const id = handle.getAttribute("data-id");
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const reverse = resizer.isReverseResizeHandle(handle);
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const domNode = reverse ? handle.nextElementSibling : handle.previousElementSibling;
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this.domNode = domNode;
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this.id = id;
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this.reverse = reverse;
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this.resizer = resizer;
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this.sizer = sizer;
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}
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_copyWith(handle, resizer, sizer) {
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const Ctor = this.constructor;
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return new Ctor(handle, resizer, sizer);
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}
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_advance(forwards) {
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// opposite direction from fromResizeHandle to get back to handle
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let handle = this.reverse ?
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this.domNode.previousElementSibling :
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this.domNode.nextElementSibling;
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const moveNext = forwards !== this.reverse; // xor
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// iterate at least once to avoid infinite loop
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do {
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if (moveNext) {
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handle = handle.nextElementSibling;
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} else {
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handle = handle.previousElementSibling;
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}
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} while (handle && !this.resizer.isResizeHandle(handle));
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if (handle) {
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const nextHandle = this._copyWith(handle, this.resizer, this.sizer);
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nextHandle.reverse = this.reverse;
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return nextHandle;
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}
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}
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next() {
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return this._advance(true);
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}
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previous() {
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return this._advance(false);
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}
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size() {
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return this.sizer.getItemSize(this.domNode);
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}
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offset() {
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return this.sizer.getItemOffset(this.domNode);
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}
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setSize(size) {
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this.sizer.setItemSize(this.domNode, size);
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const callback = this.resizer.config.onResized;
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if (callback) {
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callback(size, this.id, this.domNode);
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}
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}
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clearSize() {
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this.sizer.clearItemSize(this.domNode);
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const callback = this.resizer.config.onResized;
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if (callback) {
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callback(null, this.id, this.domNode);
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}
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}
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first() {
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const firstHandle = Array.from(this.domNode.parentElement.children).find(el => {
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return this.resizer.isResizeHandle(el);
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});
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if (firstHandle) {
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return this._copyWith(firstHandle, this.resizer, this.sizer);
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}
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}
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last() {
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const lastHandle = Array.from(this.domNode.parentElement.children).reverse().find(el => {
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return this.resizer.isResizeHandle(el);
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});
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if (lastHandle) {
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return this._copyWith(lastHandle, this.resizer, this.sizer);
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}
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}
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}
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