feat(core): setSelection method for editable text components (NativeScript#9175)

farfromrefug · web-flow · commit 58b254299770 · 2021-01-28T15:32:22.000-08:00
diff --git a/packages/core/ui/editable-text-base/editable-text-base-common.ts b/packages/core/ui/editable-text-base/editable-text-base-common.ts
@@ -23,6 +23,7 @@ export abstract class EditableTextBase extends TextBase implements EditableTextB
 
 	public abstract dismissSoftInput();
 	public abstract _setInputType(inputType: number): void;
+	public abstract setSelection(start: number, stop?: number);
 
 	private _focusHandler = () => this._goToVisualState('focus');
 	private _blurHandler = () => this._goToVisualState('blur');
diff --git a/packages/core/ui/editable-text-base/index.android.ts b/packages/core/ui/editable-text-base/index.android.ts
@@ -144,6 +144,7 @@ export abstract class EditableTextBase extends EditableTextBaseCommon {
 	/* tslint:enable */
 
 	nativeViewProtected: android.widget.EditText;
+	nativeTextViewProtected: android.widget.EditText;
 	private _keyListenerCache: android.text.method.KeyListener;
 	private _inputType: number;
 
@@ -466,4 +467,15 @@ export abstract class EditableTextBase extends EditableTextBaseCommon {
 			this.nativeTextViewProtected.setFilters(newFilters);
 		}
 	}
+
+	public setSelection(start: number, stop?: number) {
+		const view = this.nativeTextViewProtected;
+		if (view) {
+			if (stop !== undefined) {
+				view.setSelection(start, stop);
+			} else {
+				view.setSelection(start);
+			}
+		}
+	}
 }
diff --git a/packages/core/ui/editable-text-base/index.d.ts b/packages/core/ui/editable-text-base/index.d.ts
@@ -64,6 +64,11 @@ export class EditableTextBase extends TextBase {
 	 */
 	public _setInputType(inputType: number): void;
 	//@endprivate
+
+	/**
+	 * Set the selection anchor to start and the selection edge to stop
+	 */
+	public setSelection(start: number, stop?: number);
 }
 
 export type ReturnKeyType = 'done' | 'next' | 'go' | 'search' | 'send';
diff --git a/packages/core/ui/editable-text-base/index.ios.ts b/packages/core/ui/editable-text-base/index.ios.ts
@@ -5,6 +5,7 @@ export * from './editable-text-base-common';
 
 export abstract class EditableTextBase extends EditableTextBaseCommon {
 	public nativeViewProtected: UITextField | UITextView;
+	public readonly nativeTextViewProtected: UITextField | UITextView;
 	public dismissSoftInput() {
 		this.nativeTextViewProtected.resignFirstResponder();
 		this.notify({ eventName: EditableTextBase.blurEvent, object: this });
@@ -189,6 +190,21 @@ export abstract class EditableTextBase extends EditableTextBaseCommon {
 
 		this.nativeTextViewProtected.autocorrectionType = newValue;
 	}
+	public setSelection(start: number, stop?: number) {
+		const view = this.nativeTextViewProtected;
+		if (view) {
+			if (stop !== undefined) {
+				const begin = view.beginningOfDocument;
+				const fromPosition = view.positionFromPositionOffset(begin, start);
+				const toPosition = view.positionFromPositionOffset(begin, stop);
+				view.selectedTextRange = view.textRangeFromPositionToPosition(fromPosition, toPosition);
+			} else {
+				const begin = view.beginningOfDocument;
+				const pos = view.positionFromPositionOffset(begin, start);
+				view.selectedTextRange = view.textRangeFromPositionToPosition(pos, pos);
+			}
+		}
+	}
 }
 
 export function _updateCharactersInRangeReplacementString(formattedText: FormattedString, rangeLocation: number, rangeLength: number, replacementString: string): void {
