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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,119 @@ | ||
| import { Widget } from '@lumino/widgets'; | ||
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| import { FilterFileBrowserModel } from './model'; | ||
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| export class Paging extends Widget { | ||
| /** | ||
| * Construct a new file browser directory listing widget. | ||
| * | ||
| * @param model - The file browser view model. | ||
| */ | ||
| constructor(options: Paging.IOptions) { | ||
| super(); | ||
| this._model = options.model; | ||
| this._model.fileChanged.connect(this._onchange, this); | ||
| this._model.refreshed.connect(this._onchange, this); | ||
| this._model.pathChanged.connect(this._onchange, this); | ||
| this.addClass("jp-DirPagination"); | ||
| this._onchange(); | ||
| } | ||
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| /** | ||
| * Get the model used by the listing. | ||
| */ | ||
| get model(): FilterFileBrowserModel { | ||
| return this._model; | ||
| } | ||
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| /** | ||
| * Update the node | ||
| */ | ||
| private _onchange(): void { | ||
| const max_page = this._model.max_page; | ||
| const page = this._model.page; | ||
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| while (this.node.firstChild) { | ||
| this.node.removeChild(this.node.firstChild); | ||
| } | ||
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| // Don't show the paging widget if paging is not needed | ||
| if (this._model.max_page === 1) { | ||
| return; | ||
| } | ||
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| /* | ||
| if max_page <= 7 | ||
| show all items | ||
| otherwise | ||
| if page <= 4 | ||
| show 1-5 and the right ellipse | ||
| if max_page-3 <= page | ||
| show the left ellipse and max_page-4 to max_page | ||
| if 4 < page < max_page-3 | ||
| show left ellipse, page-1, page, page+1, right ellipse | ||
| */ | ||
| if ( max_page <= 7 ) { | ||
| for (let i = 1; i <= max_page; i++) { | ||
| this._createButton(i, page); | ||
| } | ||
| } else if (page <= 4) { | ||
| for (let i = 1; i <= 5; i++) { | ||
| this._createButton(i, page); | ||
| } | ||
| this._createEllipse(); | ||
| this._createButton(max_page, page); | ||
| } else if (page >= max_page - 3) { | ||
| this._createButton(1, page); | ||
| this._createEllipse(); | ||
| for (let i = max_page-4; i <= max_page; i++) { | ||
| this._createButton(i, page); | ||
| } | ||
| } else { | ||
| this._createButton(1, page); | ||
| this._createEllipse(); | ||
| this._createButton(page - 1, page); | ||
| this._createButton(page, page); | ||
| this._createButton(page + 1, page); | ||
| this._createEllipse(); | ||
| this._createButton(max_page, page); | ||
| } | ||
| } | ||
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| private _createButton(i:number, activePage:number) { | ||
| let button = document.createElement("a"); | ||
| button.textContent = i.toString(); | ||
| button.onclick = () => { | ||
| this._model.cd_page(i); | ||
| } | ||
| if (i === activePage) { | ||
| button.className = 'active'; | ||
| } | ||
| this.node.appendChild(button); | ||
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| } | ||
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| // TODO: remove the hover effect | ||
| private _createEllipse() { | ||
| let button = document.createElement("span"); | ||
| button.textContent = "..." | ||
| this.node.appendChild(button); | ||
| } | ||
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| private _model: FilterFileBrowserModel; | ||
| } | ||
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| export namespace Paging { | ||
| /** | ||
| * An options object for initializing a file browser directory listing. | ||
| */ | ||
| export interface IOptions { | ||
| /** | ||
| * A file browser model instance. | ||
| */ | ||
| model: FilterFileBrowserModel; | ||
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| } | ||
| } |
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