carbon-components-angular
Version:
Next generation components
125 lines • 16.1 kB
JavaScript
import { Component, Input, ViewChild, HostBinding } from "@angular/core";
import * as i0 from "@angular/core";
import * as i1 from "carbon-components-angular/utils";
/**
* There are two ways to create a tab, this class is a collection of features
* & metadata required by both.
*/
export class BaseTabHeader {
constructor(elementRef, changeDetectorRef, eventService, renderer) {
this.elementRef = elementRef;
this.changeDetectorRef = changeDetectorRef;
this.eventService = eventService;
this.renderer = renderer;
/**
* Set to 'true' to have `Tab` items cached and not reloaded on tab switching.
* Duplicate from `n-tabs` to support standalone headers
*/
this.cacheActive = false;
this.type = "line";
this.theme = "dark";
this.tabsClass = true;
// width of the overflow buttons
this.OVERFLOW_BUTTON_OFFSET = 44;
this.longPressMultiplier = 3;
this.clickMultiplier = 1.5;
this.longPressInterval = null;
this.tickInterval = null;
}
get containedClass() {
return this.type === "contained";
}
get themeClass() {
return this.theme === "light";
}
get hasHorizontalOverflow() {
const tabList = this.headerContainer.nativeElement;
return tabList.scrollWidth > tabList.clientWidth;
}
get leftOverflowNavButtonHidden() {
const tabList = this.headerContainer.nativeElement;
return !this.hasHorizontalOverflow || !tabList.scrollLeft;
}
get rightOverflowNavButtonHidden() {
const tabList = this.headerContainer.nativeElement;
return !this.hasHorizontalOverflow ||
(tabList.scrollLeft + tabList.clientWidth) === tabList.scrollWidth;
}
handleScroll() {
this.changeDetectorRef.markForCheck();
}
handleOverflowNavClick(direction, numOftabs = 0) {
const tabList = this.headerContainer.nativeElement;
const { clientWidth, scrollLeft, scrollWidth } = tabList;
if (direction > 0) {
tabList.scrollLeft = Math.min(scrollLeft + (scrollWidth / numOftabs) * this.clickMultiplier, scrollWidth - clientWidth);
}
else if (direction < 0) {
tabList.scrollLeft = Math.max(scrollLeft - (scrollWidth / numOftabs) * this.clickMultiplier, 0);
}
}
handleOverflowNavMouseDown(direction) {
const tabList = this.headerContainer.nativeElement;
this.longPressInterval = setTimeout(() => {
// Manually overriding scroll behvior to `auto` to make animation work correctly
this.renderer.setStyle(tabList, "scroll-behavior", "auto");
this.tickInterval = setInterval(() => {
tabList.scrollLeft += (direction * this.longPressMultiplier);
// clear interval if scroll reaches left or right edge
if (this.leftOverflowNavButtonHidden || this.rightOverflowNavButtonHidden) {
return () => {
clearInterval(this.tickInterval);
this.handleOverflowNavMouseUp();
};
}
});
return () => clearInterval(this.longPressInterval);
}, 500);
}
/**
* Clear intervals/Timeout & reset scroll behavior
*/
handleOverflowNavMouseUp() {
clearInterval(this.tickInterval);
clearTimeout(this.longPressInterval);
// Reset scroll behavior
this.renderer.setStyle(this.headerContainer.nativeElement, "scroll-behavior", "smooth");
}
}
BaseTabHeader.ɵfac = i0.ɵɵngDeclareFactory({ minVersion: "12.0.0", version: "14.3.0", ngImport: i0, type: BaseTabHeader, deps: [{ token: i0.ElementRef }, { token: i0.ChangeDetectorRef }, { token: i1.EventService }, { token: i0.Renderer2 }], target: i0.ɵɵFactoryTarget.Component });
BaseTabHeader.ɵcmp = i0.ɵɵngDeclareComponent({ minVersion: "14.0.0", version: "14.3.0", type: BaseTabHeader, selector: "ng-component", inputs: { cacheActive: "cacheActive", followFocus: "followFocus", ariaLabel: "ariaLabel", ariaLabelledby: "ariaLabelledby", contentBefore: "contentBefore", contentAfter: "contentAfter", type: "type", theme: "theme" }, host: { properties: { "class.cds--tabs": "this.tabsClass", "class.cds--tabs--contained": "this.containedClass", "class.cds--tabs--light": "this.themeClass" } }, viewQueries: [{ propertyName: "headerContainer", first: true, predicate: ["tabList"], descendants: true, static: true }], ngImport: i0, template: "", isInline: true });
i0.ɵɵngDeclareClassMetadata({ minVersion: "12.0.0", version: "14.3.0", ngImport: i0, type: BaseTabHeader, decorators: [{
type: Component,
args: [{
template: ""
}]
}], ctorParameters: function () { return [{ type: i0.ElementRef }, { type: i0.ChangeDetectorRef }, { type: i1.EventService }, { type: i0.Renderer2 }]; }, propDecorators: { cacheActive: [{
type: Input
}], followFocus: [{
type: Input
}], ariaLabel: [{
type: Input
}], ariaLabelledby: [{
type: Input
}], contentBefore: [{
type: Input
}], contentAfter: [{
type: Input
}], type: [{
type: Input
}], theme: [{
type: Input
}], tabsClass: [{
type: HostBinding,
args: ["class.cds--tabs"]
}], containedClass: [{
type: HostBinding,
args: ["class.cds--tabs--contained"]
}], themeClass: [{
type: HostBinding,
args: ["class.cds--tabs--light"]
}], headerContainer: [{
type: ViewChild,
args: ["tabList", { static: true }]
}] } });
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{\n\tComponent,\n\tInput,\n\tViewChild,\n\tElementRef,\n\tTemplateRef,\n\tChangeDetectorRef,\n\tHostBinding,\n\tRenderer2\n} from \"@angular/core\";\nimport { EventService } from \"carbon-components-angular/utils\";\n\n/**\n * There are two ways to create a tab, this class is a collection of features\n * & metadata required by both.\n */\n@Component({\n\ttemplate: \"\"\n})\nexport class BaseTabHeader {\n\t/**\n\t * Set to 'true' to have `Tab` items cached and not reloaded on tab switching.\n\t * Duplicate from `n-tabs` to support standalone headers\n\t */\n\t@Input() cacheActive = false;\n\t/**\n\t * Set to 'true' to have tabs automatically activated and have their content displayed when they receive focus.\n\t */\n\t@Input() followFocus: boolean;\n\t/**\n\t * Sets the aria label on the nav element.\n\t */\n\t@Input() ariaLabel: string;\n\t/**\n\t * Sets the aria labelledby on the nav element.\n\t */\n\t@Input() ariaLabelledby: string;\n\n\t@Input() contentBefore: TemplateRef<any>;\n\t@Input() contentAfter: TemplateRef<any>;\n\n\t@Input() type: \"line\" | \"contained\" = \"line\";\n\t@Input() theme: \"dark\" | \"light\" = \"dark\";\n\n\t@HostBinding(\"class.cds--tabs\") tabsClass = true;\n\t@HostBinding(\"class.cds--tabs--contained\") get containedClass() {\n\t\treturn this.type === \"contained\";\n\t}\n\t@HostBinding(\"class.cds--tabs--light\") get themeClass() {\n\t\treturn this.theme === \"light\";\n\t}\n\n\t/**\n\t * Gets the Unordered List element that holds the `Tab` headings from the view DOM.\n\t */\n\t@ViewChild(\"tabList\", { static: true }) headerContainer;\n\n\t/**\n\t * Controls the manual focusing done by tabbing through headings.\n\t */\n\tcurrentSelectedTab: number;\n\t// width of the overflow buttons\n\treadonly OVERFLOW_BUTTON_OFFSET = 44;\n\treadonly longPressMultiplier = 3;\n\treadonly clickMultiplier = 1.5;\n\n\tprotected longPressInterval = null;\n\tprotected tickInterval = null;\n\n\tget hasHorizontalOverflow() {\n\t\tconst tabList = this.headerContainer.nativeElement;\n\t\treturn tabList.scrollWidth > tabList.clientWidth;\n\t}\n\n\tget leftOverflowNavButtonHidden() {\n\t\tconst tabList = this.headerContainer.nativeElement;\n\t\treturn !this.hasHorizontalOverflow || !tabList.scrollLeft;\n\t}\n\n\tget rightOverflowNavButtonHidden() {\n\t\tconst tabList = this.headerContainer.nativeElement;\n\t\treturn !this.hasHorizontalOverflow ||\n\t\t\t(tabList.scrollLeft + tabList.clientWidth) === tabList.scrollWidth;\n\t}\n\n\tconstructor(\n\t\tprotected elementRef: ElementRef,\n\t\tprotected changeDetectorRef: ChangeDetectorRef,\n\t\tprotected eventService: EventService,\n\t\tprotected renderer: Renderer2\n\t) { }\n\n\thandleScroll() {\n\t\tthis.changeDetectorRef.markForCheck();\n\t}\n\n\thandleOverflowNavClick(direction: number, numOftabs = 0) {\n\t\tconst tabList = this.headerContainer.nativeElement;\n\n\t\tconst { clientWidth, scrollLeft, scrollWidth } = tabList;\n\t\tif (direction > 0) {\n\t\t\ttabList.scrollLeft = Math.min(scrollLeft + (scrollWidth / numOftabs) * this.clickMultiplier,\n\t\t\t\tscrollWidth - clientWidth);\n\t\t} else if (direction < 0) {\n\t\t\ttabList.scrollLeft = Math.max(scrollLeft - (scrollWidth / numOftabs) * this.clickMultiplier, 0);\n\t\t}\n\t}\n\n\thandleOverflowNavMouseDown(direction: number) {\n\t\tconst tabList = this.headerContainer.nativeElement;\n\n\t\tthis.longPressInterval = setTimeout(() => {\n\t\t\t// Manually overriding scroll behvior to `auto` to make animation work correctly\n\t\t\tthis.renderer.setStyle(tabList, \"scroll-behavior\", \"auto\");\n\n\t\t\tthis.tickInterval = setInterval(() => {\n\t\t\t\ttabList.scrollLeft += (direction * this.longPressMultiplier);\n\t\t\t\t// clear interval if scroll reaches left or right edge\n\t\t\t\tif (this.leftOverflowNavButtonHidden || this.rightOverflowNavButtonHidden) {\n\t\t\t\t\treturn () => {\n\t\t\t\t\t\tclearInterval(this.tickInterval);\n\t\t\t\t\t\tthis.handleOverflowNavMouseUp();\n\t\t\t\t\t};\n\t\t\t\t}\n\t\t\t});\n\n\t\t\treturn () => clearInterval(this.longPressInterval);\n\t\t}, 500);\n\t}\n\n\t/**\n\t * Clear intervals/Timeout & reset scroll behavior\n\t */\n\thandleOverflowNavMouseUp() {\n\t\tclearInterval(this.tickInterval);\n\t\tclearTimeout(this.longPressInterval);\n\n\t\t// Reset scroll behavior\n\t\tthis.renderer.setStyle(this.headerContainer.nativeElement, \"scroll-behavior\", \"smooth\");\n\t}\n}\n"]}