ngx-split-view
Version:
A resizable flex-box split layout component for Angular
223 lines • 25.3 kB
JavaScript
import { __decorate } from "tslib";
import { AfterContentInit, Component, ContentChildren, Directive, Input, OnChanges, OnDestroy, QueryList, SimpleChanges, ViewContainerRef, HostBinding, Output, EventEmitter, ContentChild, TemplateRef, ChangeDetectionStrategy, } from '@angular/core';
import { Subject, Subscription } from 'rxjs';
import { map, mergeAll, startWith, switchMap } from 'rxjs/operators';
import Split from 'split.js';
let SplitPaneDirective = class SplitPaneDirective {
constructor(viewContainerRef) {
this.viewContainerRef = viewContainerRef;
this.splitRatio = 1;
this.minSize = 100;
this.sizeChanges = new Subject();
this.minSizeChanges = new Subject();
}
ngOnChanges(changes) {
if (changes.splitRatio) {
this.sizeChanges.next();
}
if (changes.minSize) {
this.minSizeChanges.next();
}
}
};
SplitPaneDirective.ctorParameters = () => [
{ type: ViewContainerRef }
];
__decorate([
Input()
], SplitPaneDirective.prototype, "splitRatio", void 0);
__decorate([
Input()
], SplitPaneDirective.prototype, "minSize", void 0);
SplitPaneDirective = __decorate([
Directive({
// tslint:disable-next-line: directive-selector
selector: '[splitPane]'
})
], SplitPaneDirective);
export { SplitPaneDirective };
let SplitViewGutterDirective = class SplitViewGutterDirective {
constructor(template) {
this.template = template;
}
};
SplitViewGutterDirective.ctorParameters = () => [
{ type: TemplateRef }
];
SplitViewGutterDirective = __decorate([
Directive({
// tslint:disable-next-line: directive-selector
selector: '[gutterTemplate]'
})
], SplitViewGutterDirective);
export { SplitViewGutterDirective };
let SplitViewComponent = class SplitViewComponent {
constructor(viewContainerRef) {
this.viewContainerRef = viewContainerRef;
this.dragging = new EventEmitter();
this.dragStart = new EventEmitter();
this.dragEnd = new EventEmitter();
this.expandToMin = false;
this.gutterSize = 10;
this.gutterAlign = 'center';
this.snapOffset = 30;
this.dragInterval = 1;
this.direction = 'horizontal';
this.subscriptions = new Subscription();
}
get isHorizontal() { return this.direction === 'horizontal'; }
get isVertical() { return this.direction === 'vertical'; }
ngOnChanges(changes) {
if (changes.direction ||
changes.gutterSize ||
changes.gutterAlign ||
changes.snapOffset ||
changes.dragInterval ||
changes.expandToMin) {
this.refresh();
}
}
ngAfterContentInit() {
const splitPaneChanges = this.splitPanes.changes
.pipe(startWith(this.splitPanes));
const childrenChanges = splitPaneChanges
.subscribe(() => this.refresh());
const sizeChanges = splitPaneChanges
.pipe(switchMap(() => this.splitPanes.map(p => p.sizeChanges)), mergeAll())
.subscribe(() => { var _a; return (_a = this.split) === null || _a === void 0 ? void 0 : _a.setSizes(this.getSizes()); });
const dragEndEvents = this.dragEnd
.pipe(map(event => event.sizes))
.subscribe(sizes => {
const panes = this.splitPanes.toArray();
for (let i = 0; i < panes.length; i++) {
panes[i].splitRatio = sizes[i];
}
});
this.subscriptions.add(childrenChanges);
this.subscriptions.add(sizeChanges);
this.subscriptions.add(dragEndEvents);
}
ngOnDestroy() {
this.subscriptions.unsubscribe();
this.destroySplit();
}
refresh() {
this.destroySplit();
if (!this.splitPanes || this.splitPanes.length === 0) {
return;
}
const panes = new Array();
const minSizes = new Array();
this.splitPanes.forEach(d => {
panes.push(d.viewContainerRef.element.nativeElement);
minSizes.push(d.minSize);
});
const splitOptions = {
sizes: this.getSizes(),
minSize: minSizes,
expandToMin: this.expandToMin,
gutterSize: this.gutterSize,
gutterAlign: this.gutterAlign,
snapOffset: this.snapOffset,
dragInterval: this.dragInterval,
direction: this.direction,
elementStyle: (dimension, size, gutterSize) => ({
flexBasis: 'calc(' + size + '% - ' + gutterSize + 'px)'
}),
gutterStyle: (dimension, gutterSize) => ({
flexBasis: gutterSize + 'px'
}),
onDrag: (sizes) => {
if (this.dragging.observers.length > 0) {
this.dragging.emit({ source: this, sizes });
}
},
onDragStart: (sizes) => this.dragStart.emit({ source: this, sizes }),
onDragEnd: (sizes) => this.dragEnd.emit({ source: this, sizes })
};
if (this.gutterDef) {
splitOptions.gutter = (index, direction) => {
const view = this.viewContainerRef.createEmbeddedView(this.gutterDef.template);
const elements = view.rootNodes.filter(e => e instanceof HTMLElement);
if (elements.length !== 1) {
throw new Error('Gutter template must contain exactly one element');
}
return elements[0];
};
}
this.split = Split(panes, splitOptions);
}
destroySplit() {
if (!this.split) {
return;
}
this.viewContainerRef.clear();
this.split.destroy(false, !!this.gutterDef);
this.split = undefined;
}
getSizes() {
const panes = new Array();
const ratios = new Array();
let totalSize = 0;
this.splitPanes.forEach(d => {
panes.push(d.viewContainerRef.element.nativeElement);
const sanitizedSize = d.splitRatio >= 0 ? d.splitRatio : 0;
ratios.push(sanitizedSize);
totalSize += sanitizedSize;
});
return ratios.map(size => (size / totalSize) * 100);
}
};
SplitViewComponent.ctorParameters = () => [
{ type: ViewContainerRef }
];
__decorate([
Output()
], SplitViewComponent.prototype, "dragging", void 0);
__decorate([
Output()
], SplitViewComponent.prototype, "dragStart", void 0);
__decorate([
Output()
], SplitViewComponent.prototype, "dragEnd", void 0);
__decorate([
Input()
], SplitViewComponent.prototype, "expandToMin", void 0);
__decorate([
Input()
], SplitViewComponent.prototype, "gutterSize", void 0);
__decorate([
Input()
], SplitViewComponent.prototype, "gutterAlign", void 0);
__decorate([
Input()
], SplitViewComponent.prototype, "snapOffset", void 0);
__decorate([
Input()
], SplitViewComponent.prototype, "dragInterval", void 0);
__decorate([
Input()
], SplitViewComponent.prototype, "direction", void 0);
__decorate([
ContentChildren(SplitPaneDirective)
], SplitViewComponent.prototype, "splitPanes", void 0);
__decorate([
ContentChild(SplitViewGutterDirective, { static: true })
], SplitViewComponent.prototype, "gutterDef", void 0);
__decorate([
HostBinding('class.split-view-horizontal')
], SplitViewComponent.prototype, "isHorizontal", null);
__decorate([
HostBinding('class.split-view-vertical')
], SplitViewComponent.prototype, "isVertical", null);
SplitViewComponent = __decorate([
Component({
// tslint:disable-next-line: component-selector
selector: 'split-view',
template: '<ng-content select="[splitPane]"></ng-content>',
changeDetection: ChangeDetectionStrategy.OnPush,
styles: [":host{display:flex}:host.split-view-horizontal{flex-direction:row}:host.split-view-vertical{flex-direction:column}::ng-deep .gutter.gutter-horizontal{cursor:col-resize}::ng-deep .gutter.gutter-vertical{cursor:row-resize}"]
})
], SplitViewComponent);
export { SplitViewComponent };
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{\n  AfterContentInit,\n  Component,\n  ContentChildren,\n  Directive,\n  Input,\n  OnChanges,\n  OnDestroy,\n  QueryList,\n  SimpleChanges,\n  ViewContainerRef,\n  HostBinding,\n  Output,\n  EventEmitter,\n  ContentChild,\n  TemplateRef,\n  ChangeDetectionStrategy,\n} from '@angular/core';\nimport { Subject, Subscription } from 'rxjs';\nimport { map, mergeAll, startWith, switchMap } from 'rxjs/operators';\nimport Split from 'split.js';\n\nexport type SplitDirection = 'horizontal' | 'vertical';\n\nexport type GutterAlignment = 'start' | 'end' | 'center';\n\nexport interface DragEvent {\n  readonly source: SplitViewComponent;\n  readonly sizes: ReadonlyArray<number>;\n}\n\n@Directive({\n  // tslint:disable-next-line: directive-selector\n  selector: '[splitPane]'\n})\nexport class SplitPaneDirective implements OnChanges {\n  @Input() splitRatio = 1;\n  @Input() minSize = 100;\n\n  sizeChanges = new Subject<void>();\n  minSizeChanges = new Subject<void>();\n\n  constructor(public readonly viewContainerRef: ViewContainerRef) {\n  }\n\n  ngOnChanges(changes: SimpleChanges): void {\n    if (changes.splitRatio) {\n      this.sizeChanges.next();\n    }\n\n    if (changes.minSize) {\n      this.minSizeChanges.next();\n    }\n  }\n}\n\n@Directive({\n  // tslint:disable-next-line: directive-selector\n  selector: '[gutterTemplate]'\n})\nexport class SplitViewGutterDirective {\n  constructor(public readonly template: TemplateRef<any>) {\n  }\n}\n\n@Component({\n  // tslint:disable-next-line: component-selector\n  selector: 'split-view',\n  template: '<ng-content select=\"[splitPane]\"></ng-content>',\n  styleUrls: ['./split-view.component.scss'],\n  changeDetection: ChangeDetectionStrategy.OnPush\n})\nexport class SplitViewComponent implements OnChanges, OnDestroy, AfterContentInit {\n\n  @Output() dragging = new EventEmitter<DragEvent>();\n  @Output() dragStart = new EventEmitter<DragEvent>();\n  @Output() dragEnd = new EventEmitter<DragEvent>();\n\n  @Input() expandToMin = false;\n  @Input() gutterSize = 10;\n  @Input() gutterAlign: GutterAlignment = 'center';\n  @Input() snapOffset = 30;\n  @Input() dragInterval = 1;\n  @Input() direction: SplitDirection = 'horizontal';\n\n  @ContentChildren(SplitPaneDirective) splitPanes: QueryList<SplitPaneDirective>;\n  @ContentChild(SplitViewGutterDirective, { static: true }) gutterDef: SplitViewGutterDirective;\n\n  private split: Split.Instance;\n  private subscriptions = new Subscription();\n\n  constructor(private readonly viewContainerRef: ViewContainerRef) {\n  }\n\n  @HostBinding('class.split-view-horizontal')\n  get isHorizontal(): boolean { return this.direction === 'horizontal'; }\n\n  @HostBinding('class.split-view-vertical')\n  get isVertical(): boolean { return this.direction === 'vertical'; }\n\n  ngOnChanges(changes: SimpleChanges): void {\n    if (changes.direction ||\n      changes.gutterSize ||\n      changes.gutterAlign ||\n      changes.snapOffset ||\n      changes.dragInterval ||\n      changes.expandToMin) {\n\n      this.refresh();\n    }\n  }\n\n  ngAfterContentInit(): void {\n    const splitPaneChanges = this.splitPanes.changes\n      .pipe(startWith(this.splitPanes));\n\n    const childrenChanges = splitPaneChanges\n      .subscribe(() => this.refresh());\n\n    const sizeChanges = splitPaneChanges\n      .pipe(\n        switchMap(() => this.splitPanes.map(p => p.sizeChanges)),\n        mergeAll())\n      .subscribe(() => this.split?.setSizes(this.getSizes()));\n\n    const dragEndEvents = this.dragEnd\n      .pipe(map(event => event.sizes))\n      .subscribe(sizes => {\n        const panes = this.splitPanes.toArray();\n        for (let i = 0; i < panes.length; i++) {\n          panes[i].splitRatio = sizes[i];\n        }\n      });\n\n    this.subscriptions.add(childrenChanges);\n    this.subscriptions.add(sizeChanges);\n    this.subscriptions.add(dragEndEvents);\n  }\n\n  ngOnDestroy(): void {\n    this.subscriptions.unsubscribe();\n    this.destroySplit();\n  }\n\n  private refresh(): void {\n    this.destroySplit();\n\n    if (!this.splitPanes || this.splitPanes.length === 0) {\n      return;\n    }\n\n    const panes = new Array<HTMLElement>();\n    const minSizes = new Array<number>();\n\n    this.splitPanes.forEach(d => {\n      panes.push(d.viewContainerRef.element.nativeElement);\n      minSizes.push(d.minSize);\n    });\n\n    const splitOptions: Split.Options = {\n      sizes: this.getSizes(),\n      minSize: minSizes,\n      expandToMin: this.expandToMin,\n      gutterSize: this.gutterSize,\n      gutterAlign: this.gutterAlign,\n      snapOffset: this.snapOffset,\n      dragInterval: this.dragInterval,\n      direction: this.direction,\n      elementStyle: (dimension, size, gutterSize) => ({\n        flexBasis: 'calc(' + size + '% - ' + gutterSize + 'px)'\n      }),\n      gutterStyle: (dimension, gutterSize) => ({\n        flexBasis: gutterSize + 'px'\n      }),\n      onDrag: (sizes) => {\n        if (this.dragging.observers.length > 0) {\n          this.dragging.emit({ source: this, sizes });\n        }\n      },\n      onDragStart: (sizes) => this.dragStart.emit({ source: this, sizes }),\n      onDragEnd: (sizes) => this.dragEnd.emit({ source: this, sizes })\n    };\n\n    if (this.gutterDef) {\n      splitOptions.gutter = (index, direction) => {\n        const view = this.viewContainerRef.createEmbeddedView(this.gutterDef.template);\n        const elements = view.rootNodes.filter(e => e instanceof HTMLElement);\n        if (elements.length !== 1) {\n          throw new Error('Gutter template must contain exactly one element');\n        }\n        return elements[0];\n      };\n    }\n\n    this.split = Split(panes, splitOptions);\n  }\n\n  private destroySplit(): void {\n    if (!this.split) {\n      return;\n    }\n\n    this.viewContainerRef.clear();\n    this.split.destroy(false, !!this.gutterDef);\n    this.split = undefined;\n  }\n\n  private getSizes(): number[] {\n    const panes = new Array<HTMLElement>();\n    const ratios = new Array<number>();\n    let totalSize = 0;\n\n    this.splitPanes.forEach(d => {\n      panes.push(d.viewContainerRef.element.nativeElement);\n\n      const sanitizedSize = d.splitRatio >= 0 ? d.splitRatio : 0;\n      ratios.push(sanitizedSize);\n      totalSize += sanitizedSize;\n    });\n\n    return ratios.map(size => (size / totalSize) * 100);\n  }\n}\n"]}