declarative table layout and option (#2007)

* added scroll bar to table content

src/sql/base/browser/ui/editableDropdown/editableDropdown.component.ts

@@ -0,0 +1,75 @@
+/*---------------------------------------------------------------------------------------------
+ *  Copyright (c) Microsoft Corporation. All rights reserved.
+ *  Licensed under the Source EULA. See License.txt in the project root for license information.
+ *--------------------------------------------------------------------------------------------*/
+
+'use strict';
+
+import {
+	Component, Inject, forwardRef, ElementRef, OnInit, Input,
+	Output, OnChanges, SimpleChanges, EventEmitter
+} from '@angular/core';
+
+import { Dropdown, IDropdownOptions } from 'sql/base/browser/ui/editableDropdown/dropdown';
+import { AngularDisposable } from 'sql/base/common/lifecycle';
+
+import { IContextViewService } from 'vs/platform/contextview/browser/contextView';
+import { attachEditableDropdownStyler } from 'sql/common/theme/styler';
+import { IThemeService } from 'vs/platform/theme/common/themeService';
+
+@Component({
+	selector: 'editable-select-box',
+	template: ''
+})
+export class EditableDropDown extends AngularDisposable implements OnInit, OnChanges {
+	private _selectbox: Dropdown;
+
+	@Input() options: string[];
+	@Input() selectedOption: string;
+	@Input() onlyEmitOnChange = false;
+
+	@Output() onDidSelect = new EventEmitter<string>();
+
+	private _previousVal: string;
+
+	constructor(
+		@Inject(forwardRef(() => ElementRef)) private _el: ElementRef,
+		@Inject(IThemeService) private themeService: IThemeService,
+		@Inject(IContextViewService) private contextViewService: IContextViewService
+	) {
+		super();
+	}
+
+	ngOnInit(): void {
+		let dropdownOptions: IDropdownOptions = {
+			values: [],
+			strictSelection: false,
+			placeholder: '',
+			maxHeight: 125,
+			ariaLabel: '',
+			actionLabel: ''
+		};
+		this._selectbox = new Dropdown(this._el.nativeElement, this.contextViewService, this.themeService, dropdownOptions);
+		this._selectbox.values = this.options;
+		this._selectbox.value = this.selectedOption;
+
+		this._selectbox.onValueChange(e => {
+			if (this.onlyEmitOnChange) {
+				if (this._previousVal !== e) {
+					this.onDidSelect.emit(e);
+					this._previousVal = e;
+				}
+			} else {
+				this.onDidSelect.emit(e);
+			}
+		});
+		this._register(attachEditableDropdownStyler(this._selectbox, this.themeService));
+	}
+
+	ngOnChanges(changes: SimpleChanges): void {
+	}
+
+	public get value(): string {
+		return this._selectbox.value;
+	}
+}